TECHNICAL FIELD

The present disclosure relates to a shock event recording unit, a shock detection system, a mobile application for processing of data relating to a shock event, and to a method for detection of a shock event.

BACKGROUND ART

Shock detection systems, or shock sensors, are used for determination of whether an apparatus has been exposed to a shock event. Such a shock detection system is attached to or integrated within the apparatus to be monitored. Examples of apparatuses to be monitored are found in both military and civil applications comprising sensitive electronic and/or optical equipment.

Today, mechanical shock detection systems or shock sensors are used for determination of whether an apparatus has been exposed to a shock. Such system typically comprise a ball connected to a spring which is placed inside a transparent container. When the shock detection system is exposed to a shock above a certain magnitude, the ball detaches from the spring. Hence, occurrence of a shock event is determined by visual inspection. The mechanical shock detection system may be attached on the outside of the apparatus to be monitored, or be integrated within the apparatus to be monitored. A disadvantage of such shock detection system is that it is relatively easy to replace and/or to manipulate. Moreover, it requires maintenance and is relatively expensive, especially when the shock detection system is integrated within the apparatus to be monitored.

There is thus need for an improved shock detection system with low maintenance needs and which is difficult to manipulate. SUMMARY OF THE INVENTION

An object of the present disclosure is to provide a solution for shock detection wherein some of the above identified problems are mitigated or at least alleviated.

The disclosure proposes a shock event recording unit arranged to monitor an apparatus comprising a motion powered generator attached to or integrated within the apparatus. The motion powered generator is arranged to generate a signal relating to an acceleration to which the generator has been exposed. The shock event recording unit further comprises a control unit and a memory unit. The generator is arranged to generate the signal when the acceleration exceeds a predetermined value, wherein the signal energizes the control unit to activate it. The control unit is arranged to when activated/energized, control writing of information indicating a shock event to the memory unit. Since the generator is motion powered it does not require an additional power source, such as a battery. Thereby, the size of the shock event recording unit can be reduced as compared to a system which requires an external power source, such as a battery. Since no battery is needed, maintenance of the shock event recording unit / shock detection system due to battery replacement is not needed and hence there are no costs related to batteries and maintenance thereof.

According to some aspects, the control unit is arranged to when activated control writing of an acceleration level relating to the shock event.

According to some aspects, the memory unit is further provided with means for wireless communication with an electronic user device, such as a smartphone. By providing the memory unit with means for wireless communication with an electronic user device, it is possible to monitoring the shock event an acceleration recording is exposed to via a commercial available electronic user device such as a smartphone. By using a commercial available electronic user device for determination of shock occurrences, the shock detection system becomes cheaper as compared to a shock detection system using a custom-made device for monitoring of shock occurrences. By the use of a commercial available electronic user device, the system is more flexible as compared to a system where a custom-made electronic user device is used since readout of a shock event recording unit does not require a specific electronic user device for readout. The present disclosure also relates to a shock detection system comprising a shock event recording unit and an electronic user device, such as a smartphone, wherein the memory unit of the shock event recording unit is further provided with means for wireless communication with the electronic user device. The shock event recording unit may be attached to an apparatus to be monitored, hence the shock event recording unit and the shock detection system is cheaper as compared to a system which is integrated within an apparatus to be monitored. Since the data regarding a shock event is stored into a memory unit and determined by an electronic user device, it is difficult to manipulate the shock detection system as compared to a shock detection system in which occurrence of a shock event is determined by visual inspection.

According to some aspects, the electronic user device comprises a mobile application. By the use of a mobile application, the shock detection system may be provided with a large number of functions, such as comparison means etc. The functions may be tailor-made to fit a specific application and/or apparatus to be monitored.

According to some aspects, the mobile application comprises means for determining the magnitude of the shock event. By means for determining the magnitude of a shock, it may be possible to determine how big the damage caused to the apparatus is. It may also be possible to disregard shock events below a certain magnitude. It may also be possible to store the magnitude in a database which may be used for comparison with other shock events etc.

According to some aspects, the mobile application comprises means for determining whether a shock event is harmful to the apparatus or not. By such determination means, it may be possible to only monitor shocks that are harmful to a specific application/apparatus and to disregard shocks that are non-harmful to the apparatus to be monitored for example.

According to some aspects, the mobile application comprises means for determining the time of a shock event. By determination of the time of a shock event, it may be possible to determine if there are certain times when shocks typically occurs. It may also be possible to determine who was the user of the apparatus upon a shock occurrence. Thereby it may also be possible to determine responsibility for the shock occurrence for example. According to some aspects, the mobile application comprises means for determining a pattern of shock event occurrences upon repeated shocks. By means for determining a pattern of shock events, it may for example be possible to determine when shocks typically occurs and if there is any specific occasion that triggers shocks. According to some aspects, the electronic user device has access to a database for storing and retrieving data received from the shock event recording unit. The database may enable storage of a large amount of data. The data may be retrievable/accessible via the electronic user device, not only upon readout of the memory unit. Further, the data stored in the database may be used for comparison of shock events of different apparatuses for example. The present disclosure also relates to a mobile application for processing of data relating to a shock event, the application being arranged to receive acceleration data relating to an acceleration from a memory unit, process the acceleration data and report occurrence of a shock event into a database. The mobile application may be tailor-made to a specific application/apparatus to be monitored. The present disclosure also relates to a method for monitoring if an apparatus has been exposed to a shock, comprising obtaining a signal relating to an acceleration to which the apparatus has been exposed. When the acceleration exceeds a predetermined value, the method comprises activating/energizing a control unit with the obtained signal, and control by means of the control unit writing of information indicating a shock event to the memory wherein when activated/energized. The method corresponds to the actions performed by the shock event recording unit and/or shock detection system as discussed above and have all the associated effects and advantages of the disclosed shock event recording unit and shock detection system.

The present disclosure also relates to an electronic user device comprising a mobile application for processing of data relating to a shock event, wherein the electronic user device is arranged to receive data from a shock event recording unit. BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 illustrates an example of a shock detection system according to the present disclosure.

Figure 2 illustrates an example of a shock event recording unit of a shock detection system according to figure 1, attached onto an apparatus to be monitored.

Figure 3a and Figure 3b illustrate an example of a generator of a shock event recording unit according to figure 1, and an example of an electrical circuit diagram of a generator of a shock event recording unit according to figure 1, respectively.

Figure 4 illustrates an example of a control unit of a shock event recording unit according to figure 1.

Figure 5 illustrates an example of a memory unit of a shock event recording unit according to figure 1.

Figure 6 illustrates an example of an electronic user device of a shock detection system according to figure 1.

Figure 7 is a flow diagram illustrating steps performed by a mobile application in an electronic user device of a shock detection system according to an example.

Figure 8 is a flow diagram illustrating method steps for detection of a shock event according to an example.

DETAILED DESCRIPTION

Figure 1 illustrates a shock detection system 100 according to the present disclosure. The shock detection system 100 comprises a shock event recording unit 101 and an electronic user device 140, such as a smartphone. The shock event recording unit 101 comprises a generator 110, a control unit 120 and a memory unit 130. The shock detection system 100 may further be provided with means for communication between the electronic user device 140 and a cloud service / network 150. Optionally, the shock detection system 100 may comprise additional sensors 160, 170, 180 for monitoring parameters, such as temperature, position, time and/or humidity of the shock event recording unit 101 and/or of an apparatus to be monitored.

The shock event recording unit 101 may be attached onto an apparatus in order to monitor if the apparatus is exposed to a shock event. Alternatively, the shock event recording unit 101 may be integrated within the apparatus to be monitored. As a further alternative, the generator 110 of the shock event recording unit 101 may be integrated within the apparatus while the control unit 120 and memory unit 130 of the shock event recording unit 101 may be attached onto the apparatus. Examples of apparatuses to be monitored are optical and/or electronic equipment which are sensitive to shock events. Examples of such optical and/or electronic equipment are found in military and police applications, e.g. weapons, wests, in training equipment such as laser transmitters and/or detectors attached to weapons and other equipment provided on a west for use in training, as well as in civil applications, e.g. rental tools.

Figure 2 illustrates an example where a shock event recording unit 101 of a shock detection system 100 is attached onto a weapon 190. In this example, the shock event recording unit 101 is attached to the weapon pipe but it may be attached anywhere onto the weapon. Typically, the shock event recording unit 101 may be attached on or adjacent to a portion of an apparatus where sensitive electronic and/or optical equipment is located.

A shock event may be defined as a strong acceleration, i.e. a mechanical force, due to a motion. A shock event may occur due to abnormal handling of the apparatus onto which the shock event recording unit 101 is attached. A shock event does not arise due to normal handling of the apparatus, such as vibrations which occurs during normal movements, for example vibrations due to transportation of the apparatus in a vehicle or vibrations due to that the apparatus is carried by a person. A shock event may for example be that the apparatus is dropped onto the ground. As a further example, a shock event may be due to a shaking of the shock event recording unit 101 or of the apparatus onto which the shock event recording unit 101 is attached. As will be discussed below, the sensitivity of the shock detection system 100 may be controlled via the generator 110 and/or control unit 120 and/or the electronic user device 140. In Figure 3a, the generator 110 of a shock event recording unit 101 according to the present disclosure is shown. The generator comprises an electrical circuit 112. The generator 110 is electrically connected to the control unit 120 of the shock event recording unit 101 via an electrical wire 122 of the electrical circuit 112. The generator 110 is a motion powered unit which is arranged to generate an electrical signal in the electrical circuit 112 which activates and energizes the control unit 120 upon exposure to a shock event.

The electrical signal is generated at least when the shock event exceeds a predetermined value. As will be discussed below, the predetermined value may be set in the generator 110 and may depend on the application of the apparatus onto which the shock event recording unit 101 is attached. In one example, the predetermined value is set to the lowest possible value needed in order to write information indicating a shock event into the memory unit 130. As an example, the predetermined value in the generator may be set to e.g. 150 G.

In Figure 3b, an example of an electrical circuit diagram of the electric circuit 112 of the generator 110 is shown. The generation of the electric signal by the electric circuit 112 of the generator 110 is not the subject of this patent application and therefore not discussed in detail herein.

As illustrated in figure 3b, the electric circuit 112 of the generator 110 generally comprises a coil 1121, a magnet 1122 and a capacitor 1223. In this example the magnet 1122 is arranged within the coil 1121. The magnet 1122 may be arranged to be movable in relation to the coil

1121. Alternatively, the coil 1121 may be arranged to be movable in relation to the magnet

1122. Upon exposure to a shock event, the magnet 1122 moves in relation to the coil 1121, or the coil 1121 moves in relation to the magnet 1122, whereby an electrical signal is generated in the coil 1121. The electrical signal generated is thus proportional to the acceleration force due to the motion, i.e. to the shock event. The capacitor 1223 is electrically connected to the coil 1121 and is arranged to accumulate the electrical signal generated. In the illustrated example in figure 3b, the electrical circuit may further comprise a comparator 1224. In the example in Figure 3b, the comparator may be arranged to compare the generated electrical signal with a predetermined value. At least when the electric signal exceeds the predetermined value, the capacitor 1223 is charged. In one example, the capacitor 1223 is discharged when the electrical signal generated exceeds the predetermined value. When the capacitor is discharged, the electrical signal is transferred to the control unit 120. As mentioned above, as an alternative, the generator may transfer all electrical signals generated in the generator to the control unit, wherein the determination whether the signal exceeds the predetermined value or not takes place in the control unit. As another example, the predetermined value may be set in a mobile application 145 of the electronic user device 140. If the predetermined value is set in the mobile application 145, the determination of whether the shock event exceeds the predetermined value takes place in the mobile application. The generator may comprise 1-3 coils for detecting shock events in the x-axis, y-axis and z-axis direction(s). As an example, if shock events are monitored in a plurality of directions, the sum of the electric signals generated in the plurality of directions are arranged to charge the capacitor.

Further, the capacitor 1223 of the generator 110 is electrically connected via a wire 122 to the control unit 120. As mentioned above, in one example, the capacitor 1223 is discharged when the electrical signal generated exceeds the predetermined value. Thereby the electric signal generated in the coil 1121 activates/energizes the control unit 120. Upon activation/energization of the control unit 120, the control unit is arranged to control writing of information indicating the shock event to the memory 131 of the memory unit 130. The information is typically a bit, i.e. "a shock has occurred", corresponding to a shock event.

As an alternative, the signal from the control unit 120 may be an amplitude corresponding to the discharge of the capacitor, i.e. also corresponding to the magnitude of the shock event. If also the magnitude of the shock event is monitored, the amplitude of the shock event is stored in the memory unit 130 as well as, or instead of as, a bit.

In Figure 4, the control unit 120 of the shock event recording unit 101 is shown. The control unit 120 is connected to the generator 110 via the electrical wire 122 and is arranged to receive the electrical signal relating to an acceleration to which the generator 110 has been exposed upon a shock event. The control unit may be a microcontroller, a Field-programmable gate array (FPGA) or any other logic circuit.

In the example in Figure 4 the control unit 120 comprises a processor 124. The control unit 120 may further comprise an interface 121 enabling transfer of data between the control unit 120 and the memory unit 130. Optionally, the control unit 120 may be arranged to receive data from one or more additional sensor(s) 180. If the control unit 120 is arranged to receive data from one or more additional sensor(s) the control unit 120 may further be provided with an interface 123 and the sensor 180 may be provided with an interface 181 for communication between the control unit 120 and the one or more additional sensor(s) 180. As mentioned above, the control unit 120 may be arranged within the generator 110. Alternatively, the control unit 120 may be arranged on the outside of the generator 110.

As discussed above, the predetermined value may be set in the comparator 1224 of the generator 110. Alternatively, the predetermined value may be set in the control unit 120. As a further example, a first predetermined value may be set in the comparator 1224 of the generator 110 and a second predetermined value may be set in the control unit 120. As will be discussed below, in yet another example, the predetermined value may be set in the mobile application 145 of the electronic user device 140. As a further alternative, a first predetermined value is set in the comparator of the generator 110 and/or in the control unit 120 and a second predetermined value is set in the mobile application 145.

Data may be transferred from the control unit 120 to the memory unit 130 only when the control unit 120 is activated/energized. Alternatively, the control unit 120 may be energized by an external power source, such as a battery, continuously. The data between the control unit 120 and the memory unit 130 may be transferred by a wired interface, such as Inter- Integrated Circuit, l ² C. Alternatively, data is transferred from the control unit to the memory unit 130 via a wireless interface or via optical transmission.

Figure 5 illustrates the memory unit 130. The memory unit 130 is arranged to receive data from the control unit 120. The memory unit may comprise a memory 131 for storing the data received from the control unit 120. The memory unit 130 may further comprise an interface 132 for receiving data from the control unit 120. The memory unit 130 may further comprise an interface 133 for transferring data from the memory unit 130 to the electronic user device 140. Optionally, the memory 130 unit may be arranged to receive data from one or more additional sensor(s). If the memory unit 130 is arranged to receive data from one or more additional sensor(s) 170, the memory unit 130 may further be provided with an interface 134, and the sensor 170 may be provided with an interface 171, for communication between the memory unit 130 and the sensor 170. In addition, the memory 131 of the memory unit 130 may be provided with a real time clock 135, thus enabling writing of the time for a shock event into the memory 131 of the memory unit 130. If the memory 131 is provided with a real time clock 135, the memory is characteristically energized continuously. Alternatively, the real time clock 135 may be provided in the generator 110 or in the control unit 120. If a real time clock 135 is used, energization by an external power source is typically needed.

For example, the memory unit 130 may transfer data to the electronic user device 140 upon request from the electronic user device 140. Alternatively, the memory unit 130 may transfer data to the electronic user device 140 upon receipt of data from the control unit 120. As a further example, the memory unit 130 may transfer data to the electronic user device 140 upon predetermined time intervals. If transferring data to the electronic user device 140 upon predetermined time intervals the memory 131 of the memory unit 130 is characteristically provided with a real time clock 135. A real time clock requires continuously energization of the memory unit 130 by an external power source, such as a battery.

Figure 6 illustrates the electronic user device 140. The electronic user device 140 is arranged to receive data from the memory unit 130. As seen in figure 6, the electronic user device 140 may comprise a mobile application 145, a so-called app, for processing data received from the memory unit 130. The electronic user device 140 may further comprise an interface 144 for data transfer between the memory unit 130 and the electronic user device 140. The electronic user device 140 may further comprise an interface 143 for data transfer between the cloud service / network 150 and the electronic user device 140. The cloud service / network 150 may comprise a database 151 for storing the data received from the memory unit 130 and/or the data being processed by the mobile application 145. Optionally, the electronic user device 140 may be arranged to receive data from one or more additional sensor(s) 160. If the electronic user device 140 is arranged to receive data from one or more additional sensor(s) 160, the electronic user device 140 may comprise an interface 142 for communication between the electronic user device 140 and the additional sensor(s) 160. Alternatively, the communication between the electronic user device 140 and the sensor 160 may take place via the cloud service / network 150. Data received from the one or more additional sensor(s) 160 may be processed by the mobile application and stored in the database 145. The electronic user device 140 is typically a Commercial off-the-shelf (COTS) device, i.e. a commercially available device, such as a smartphone or tablet. The electronic user device 140 may comprise a wireless reader, for wireless communication via e.g. Near Field Communication (NFC), Bluetooth, ZigBee, Bluetooth Low Energy (BLE), Radio Frequency Identification (RFID) or WiFi, thereby enabling data transfer between the memory unit 130 of the shock event recording unit 101 and the electronic user device 140. Upon transfer of data, the electronic user device 140 is brought close, typically at a distance of a few centimetres, to the memory unit 130, wherein the data is transferred from the memory unit 130 of the shock event recording unit 101 to the electronic user device 140. The wireless reader may further be provided with security functions, such as authentication in order to allow or deny data transfer between the memory unit 130 and the electronic user device 140.

The database 151 may be used for storing the data received from the memory unit 130 and/or for storing the data that has been processed by the mobile application 145. As mentioned above, the database 151 may be provided in a cloud service / network 150. As another example, the database 151 may be provided in the electronic user device 140. As a further example, the database 151 may be provided in the mobile application 145 of the electronic user device 140.

Since the electronic user device 140 may be used for readout of a plurality of shock event recording units 101, the database 151 may be arranged to store information regarding the plurality of shock event recording units 101 and/or apparatuses to be monitored.

The shock event recording unit 101 may be provided with an ID thus enabling identification of a specific shock event recording unit 101. The ID may be provided in the control unit 120 or in the memory unit 130. Upon occurrence of a shock event, the ID of the shock event recording unit 101 together with information regarding the shock event and/or data relating to other parameters monitored by additional sensors 160, 170, 180, such as temperature, position and/or humidity may be stored in the database 151.

Upon transfer of data from the memory unit 130 to the electronic user device 140 relating to a shock event the data may be stored in the database 151. For example, all shock events may be reported to and stored in the database 151 as they fulfil the criterion set by the predetermined value set in the generator 110 and/or in the control unit 120 of the shock event recording unit 101. Alternatively, if also the magnitude of the shock is monitored, only shock events above a certain magnitude may be stored in the database 151, for example depending of what type of apparatus that is monitored. If also the magnitude of the shock events are monitored, the actual value of the shock may be stored in the database 151 as well. The mobile application 145 may be provided with means for processing the data received from the memory unit of the shock event recording unit 101. As an example, the mobile application 145 may process the data received from the memory unit 130 and determine if the received data should be stored in the database 145 or not based on, for example, the magnitude of the shock event. The data received from the memory unit 130 may be stored directly in the database 151. Alternatively, the data received from the memory unit 130 may be processed by the mobile application 145 before being stored in the database 151. Examples of processing performed by the mobile application 145 will be discussed below.

As discussed above, the mobile application may be provided with means in order to determine if a shock event exceeds a predetermined value. The predetermined value may be determined and/or adjusted via the mobile application 145. The mobile application 145 may be provided with comparison means, hence with ability to distinguish between different types of shock events by comparing the data received from the shock event recording unit 101 with example data of shock events which are stored in the mobile application and/or database. As an example, the mobile application 145 may be able to determine if a shock has occurred due to that the apparatus to be monitored, e.g. a weapon, has been dropped on the ground or whether the shock is due to a blank firing, based on the example data of shock events stored in the database 151. As a further example, the app 145 may be provided with means for disregarding certain types of shock events, e.g. to disregard shocks due to firing of a weapon based on the data stored in the mobile application 145 and/or in the database 151.

If the shock detection system is configured to monitor the magnitude of a shock event, the mobile application 145 may be provided with a conversion table for conversion of the magnitude of the shock. The conversion table may be stored in the database 150. Such a conversion table may be obtained by mounting the shock event recording unit 101 onto a number of apparatuses and performing of tests of the apparatuses onto which the shock event recording unit is mounted. Each test corresponds to a certain chock event, such as dropping the apparatus onto the ground. The electrical signal generated for each test may be measured and stored as a reference value into the database. When a shock event recording unit onto an apparatus to be monitored is exposed to a shock event the value relating to the shock event is compared with the reference values stored in the database. If the value corresponds to any of the reference values, it may be concluded that the shock corresponds to the same type of shock event. The mobile application may be provided with means in order to determine whether a value relating to a shock event corresponds to a reference value stored in the database or not.

Upon a training situation, it may be possible to control the training and to monitor the status of training equipment, such as weapons and/or wests, by a so-called training management system. Training may be related to military training, but also to civilian training, for example police training. The data from the training management system may be used for follow-up of events occurred during a training situation. The training management system may be provided with means for determination of firing of a weapon, detection of that a player is hit by a shot or that a fired shot has not hit a player, position of a player etc. It may also be provided with means for determining the time for the shot firing and position of the weapon when the shot was fired. The training management system may further be provided with means for receiving and storing an identification, ID, of the equipment, means for determining the position of the equipment, such as GPS, etc. in order to associate the equipment with a specific player. It is also possible to connect the identity of the equipment with the user of the equipment. Such a training management system may for example be provided in the cloud service / network 150 and being accessible by the electronic user device 140. Data from the training management system may thus be used for comparison with the data regarding shock events received from the memory unit 130 of the shock event recording unit 101. Data from the training management system may for example be used for determination of a position of a weapon when it has been dropped, determination of a user of a weapon which has been dropped etc.

In addition to the data regarding occurrence of a shock event it may be of interest to determine when a shock event has occurred. In one example, a time interval for a chock occurrence is determined. The time interval determination may be made by determination of the time from a first readout of the memory unit 130 by the electronic user device 140 to the time of a next readout of the memory unit 130 by the electronic user device 140. The time interval determined may then be stored in the database 151 of the user unit 140. Alternatively, the time interval for a shock occurrence may be determined based on the time from a resetting of the memory unit 130 of the shock event recording unit 101 and the time of readout via the electronic user device 140. As an example, the data stored in the memory unit of the shock event recording unit 101 may be reset automatically upon transfer of the data to the electronic user 140.

As a further example, the time for a shock event may be determined by providing the memory 131 of the memory unit 130 with a real time clock 135 such that the exact time for a shock event may be monitored. If monitoring the time of a shock event, the data regarding the time of a shock event is transferred to the electronic user device 140 together with the transfer of data regarding the shock event. If the memory 131 is provided with a real time clock 135, the memory 131 is characteristically energized continuously. Alternatively, if the shock detection system 100 comprises a position sensor, a GPS, the time registered by the GPS relating to a shock event may be stored together with information relating to the shock event in the database 151. As a further example, the control unit 120 may be provided with a counter which may be driven by the generator 110. If a counter is used, the time registered by the counter may be subtracted from the actual time monitored by the electronic user device upon readout of the memory unit 130. Thereby an approximate time for the shock event may be obtained.

As mentioned above, the shock detection system 100 may optionally comprise one or more additional sensors 160, 170, 180 for monitoring and storing parameters such as temperature, humidity and/or position of the shock event recording unit 101 and/or of the apparatus onto which the shock detection system 100 is attached. Such sensors may typically be arranged adjacent to the shock event recording unit 101 onto the apparatus to be monitored, but may be arranged at other portions or parts of the apparatus as well. Such additional sensor(s) 160, 170, 180 may be an electronic sensor. Alternatively, the additional sensor(s) 160, 170, 180 may be driven by the generator 110. For example, the additional sensor(s) 160, 170, 180 may arranged to be driven by shaking of the shock event recording unit/apparatus onto which the shock event recording unit 101 is attached, thereby generating an electrical signal which is used for writing information relating to the parameter monitored by the additional sensor(s) into the memory unit 130. By the use of a position sensor, e.g. Global Positioning System, GPS, it may be possible to determine the geographical position where a shock event has occurred. As shown in Figure 1, such additional sensor(s) 160, 170, 180 may be connected to the memory unit 130 and/or to the control unit 120 and/or to the electronic user device 140 of the shock detection system 100. If a sensor 180 is connected to the control unit 120, the data from the sensor 180 may be transferred to the control unit 120 when the control unit 120 is activated/energized. If the sensor 170 is attached to the memory unit 130, data may be transferred to the memory unit 130 when the memory unit is energized/activated. Alternatively, such a sensor 160, 170, 180 may transfer data via a cloud service / network 150, wherein the data from the sensor(s) can be transferred by the electronic user device 140. Data received from the one or more additional sensors may be stored and processed by the mobile application 145 in the same way as the data received from the shock event recording unit 101.

Based on the data stored in the database, such as data regarding when shocks typically occur, or has occurred for a specific equipment, it may be possible to schedule maintenance of the apparatus upon appropriate intervals for a specific shock event recording unit/apparatus.

The functions described above, may be arranged also in other parts of the shock detection system 100 as well.

Figure 7 illustrates the steps 200 performed by a mobile application for processing of data relating to a shock event. The mobile application being arranged to receive acceleration data relating to an acceleration from a memory unit S21, process the acceleration data S22 and report occurrence of a shock event into a database S23.

Figure 8 illustrates the method steps of a method 300 for monitoring if an apparatus has been exposed to a shock by a shock detection system 100. The shock detection system 100 comprises a motion powered generator 110 attached to or integrated within the apparatus, a control unit 120 and a memory unit 130. The method 300 comprises obtaining a signal relating to an acceleration S31 to which the apparatus has been exposed. When the acceleration exceeds a predetermined value, the method comprises activating/energizing a control unit with the obtained signal S32 and control by means of the control unit writing of information indicating a shock event to the memory S33 wherein when activated/energized.