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WO/1997/003385 |
The sensor fault detector is one in which each sensor signal is compared with a reference signal provided by e.g. a model of the system being monitored. Prior art sensor fault detectors subtract the output of the sensor and the correspon...
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WO/1997/002095 |
A system and method of operating a centrifuge is disclosed. The operational parameters of the centrifuge are determined on the basis of the experimental protocol selected by the user. Parameters relevant to the particular experimental pr...
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WO/1997/001080 |
A verification system (10) monitors the operation of a digital control system in order to insure proper operation. The verification system (10) receives control signals and monitors these control signals to determine whether operation is...
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WO/1996/041294 |
Method and apparatus for a fault tolerant automatic control system for a dynamic device (1) having a sensor (S1) (105) and a predetermined control algorithm include structure (104) and steps for receiving a status signal from the sensor ...
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WO/1996/031812 |
Proposed is a device for operating an actuator-motor drive (11) which includes a relay-controlled switchover device (12) for the clockwise/anticlockwise running of the actuator motor (10). A first semiconductor switch (23) is fitted to f...
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WO/1996/029609 |
In a multiple-channel monitoring device for monitoring the state of operation of installations, an additional test input (45a, 45b) per channel (2, 3) is provided at the evaluating and monitoring circuit to test the supply lines (7a, 7b)...
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WO/1996/028710 |
The invention concerns a method and a responsive signal-processing system (1), in particular a safety-control system for nuclear power plants, the method calling for the allocation of the data-processing units (3), the data-transfer unit...
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WO/1996/028769 |
The invention relates to a safety switch arrangement (1) for switching the power supply to a working device on and off by means of a sensor signal which is taken to the working device via two evaluation channels (2), each with an actuato...
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WO/1996/026471 |
In a machine to be operated such that tools and a work are always brought into synchronism with each other, method and device for controlling at the time of power failure adapted to retract tools to a safe area without breaking the tools...
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WO/1996/021929 |
In order to stabilize a transient instability in a boiling-water reactor, the invention calls for the oscillating neutron flux to be measured and, when it exceeds a first limit over several periods of oscillation, for the rate of increas...
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WO/1996/019756 |
An electrically isolated transducer circuit comprises a transducer (1) to detect a physical variable (e.g. temperature) and a processor (3) connected to the transducer (1) to process signals and produce an output (7) for a process contro...
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WO/1996/019316 |
A tool breakage detecting system adapted to detect the breakage of a tool with a high accuracy which occurs in some cases even when a load is not substantially imparted to a rotary shaft and a tool feed shaft. The disturbance load torque...
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WO/1996/016369 |
When using a method for processing signals in a protection system operations being complementary to each other are executed on the signals, whereby it depends on the results thereof whether the operations can be continued. Besides logic ...
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WO/1996/014226 |
Proposed is a microprocessor arrangement for a vehicle control system with a plurality of microprocessor systems that are linked by a bus system and that carry out at least an anti-lock braking (ABS) and automatic slip control (ASR) as w...
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WO/1996/013764 |
In a process for analysing or preparing a measurement (MW) detected in a plant process (6) by a measuring system (4) and tested for plausibility at a first comparison point (16) by means of specific characteristic values (K) for the meas...
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WO/1996/010288 |
To monitor redundant control channels (8a, 8b) for the exciter (6) of an electric generator (4), the invention calls for a status value indicating the reliability of operation of the control channel (8a, 8b) to be determined for each cha...
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WO/1996/007138 |
An equivalent unit (EFE) can be taken into service via electronic input and output selector switches (EUS1, AUS1) via a combination unit (KOM) on the failure of a functional unit (FE1). The input signal (ES1) is taken to the equivalent u...
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WO/1996/003680 |
When monitoring the relation between logic signals from which a control signal is derived, a transformer is switched on and off by means of the control signal, whereby the switching transformer generates a supply voltage, which is in tur...
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WO/1996/001954 |
A control circuit for controlling a combined emergency shutdown and process protection (safety) system, especially on board platforms and vessels. There are two separate signal generators which, each by means of a control line (10, 17) o...
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WO/1995/034027 |
A transmitter (10) coupled to a control loop (16) which carries a loop current senses a process variable which is transmitted over the loop (16). Circuitry in the transmitter presents an effective capacitance Ceff to the control loop (16...
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WO/1995/034026 |
A control system is proposed for mobile machinery, in particular for construction machines such as excavators, wheel loaders, graders and the like. The system comprises at least two local control units which are functionally independent ...
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WO/1995/030189 |
The data are classified as more or less dangerous depending on the system values which they represent and, where data are unequal, are transiently processed further with the data classified as less dangerous. It is possible, especially w...
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WO/1995/017706 |
In an actively redundant computer system, in which two or more computers simultaneously control a process, live data values representing the actual state of preselected variables are simultaneously displayed along with an alphanumeric re...
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WO/1995/016226 |
A measured value judging method for comparing measured values from sensors provided at various locations of a device with pre-set reference values and judging based on the results of the comparison so made whether the device is normal or...
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WO/1995/014262 |
The method for detecting in a controlled apparatus and process the freezing or failure of a sensing process and assembly comprising a sensor generating a sensor output signal and related components converting the sensor output signal int...
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WO/1995/004674 |
A circuitry for regulating braking systems of motor vehicles having an antilocking system and/or a drive slip control has circuits for processing sensor signals and for generating brake pressure control signals for piloting the hydraulic...
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WO/1994/028557 |
A method and system for monitoring an industrial process and a sensor. The method and system include generating a first and second signal characteristic of an industrial process variable. One of the signals can be an artificial signal ge...
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WO/1994/021030 |
In a numerically controlled machine there is provision for contrallably feeding the kinetic energy of a work spindle drive into the intermediate circuit in the event of a power failure and effecting a program-controlled emergency withdra...
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WO/1994/006064 |
An arrangement has several analog input units (AE1, AE2) to which sensors (TE1, TE2, KD) arranged at measurement sites and at a comparison site are connectable. The analog input units derive measurement values from the signals of the mea...
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WO/1994/003854 |
A failsafe avionics interface unit (10) serves as a protocol converter system for translating data for control purposes from a digital communication bus (65) to an analog control channel as an upgrade or interface to an existing analog c...
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WO/1994/003846 |
A method of input signal resolution in a process control system where each of the actively redundant process control computers performs a common arbitration process on corresponding input signals. Blocks of corresponding input signals ar...
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WO/1994/000682 |
A motor vehicle control device has at least two computing elements for carrying out at least the same control function. Steps are provided for testing the capacity of operation of the control device. The execution of measures steps is sh...
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WO/1993/025945 |
A stealth interface for an intelligent front-end communication system which couples a plurality of actively redundant process control computers to a computer network. The stealth interface in each of the actively redundant process contro...
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WO/1993/025965 |
An intelligent front-end communication system which is interposed between a plurality of actively redundant process control computers and a computer network. The intelligent front end communication system includes at least one front end ...
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WO/1993/020488 |
A process control interface system (10) having a network of distributed triply redundant input/output field computer units (12). The system includes a plurality of self-contained remotely located triply redundant field computer units (12...
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WO/1993/011475 |
The invention concerns a method for the automatic control of manufacturing processes by means of a process-control system in which automatic programmes access individual control modules. The method is characterized in that: a) the contro...
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WO/1993/009020 |
The proposal is for a process for dealing with errors in electronic control devices. It also comprises a device for controlling the steering angle of the rear wheels of a motor vehicle. The control device controls a setting device to whi...
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WO/1993/005991 |
An anti-skid control circuit for a wheeled vehicle and a method of processor computation confirmation within such an anti-skid control circuit includes the confirmation of proper processor operation only at a certain one of the computati...
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WO/1993/005453 |
The invention relates to an electronic control circuit of the ''Fail-Safe Emergency Shut-Down'' type comprising an input circuit, a first signal processing circuit, in which information is stored beforehand relating to the extreme values...
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WO/1993/004415 |
A method and apparatus for dealing with an instantaneous voltage drop of the power supply in a CNC equipment, by which any input unit for switching on/off the external power supply can be dispensed with and the button operation is simple...
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WO/1992/017828 |
A signal selection system has input thereto a plurality of redundant input signals (A, B, C, D) having varying values along with signals indicative of the validity of the plurality of input signals, comparison logic (42-52) compares all ...
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WO/1991/011757 |
A control system comprising a device to be controlled, a sensor to provide a signal indicative of a predetermined parameter, an electrical circuit to supply said signal to a managing means responsive to said signal to control said device...
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WO/1991/010176 |
A device is provided to prevent erroneous operation of an object to be controlled connected to the controller if the clock is interrupted. When a clock monitoring unit (15) detects that no clock pulse signal (CL) is generated from a cloc...
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WO/1991/008535 |
A backup mode of operation for a process control program sends messages, via a local area network (20), to a program running in an active mode to obtain current values of process control data and configuration information. Upon failure t...
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WO/1990/011556 |
A system for controlling the input and output signals in a PMC (programmable machine controller). In addition to an ordinary input/output signal region (23a), a false input/output signal region (23b) is provided to use the signals of the...
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WO/1990/007736 |
The device for the redundant control of a power device (R) may be comprised of two programmable switches (A1, A2) capable of elaborating a control order. Said switches (A1, A2) are fitted with two respective logical circuits designed to ...
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WO/1990/003602 |
A control system includes a microcontroller (18) which receives input signals from input sensors (14) and transmits output signals to electrically actuated solenoid valves (16) in response to the input signals. A drive circuit controller...
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WO/1990/002364 |
A fault diagnosing system adapted to diagnose a fault of CNC (numerically controlled apparatus) system having a PC (programmable controller) by the host computer at a remote site. The host computer (4) is adapted to perform a fault diagn...
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WO/1990/001732 |
This invention relates to an impingement detection/driving stop method which can quickly detect the impingement of a machine operation portion driven by a servo motor against foreign matters, can quickly stop driving of the machine opera...
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WO/1989/010865 |
An electronic control unit for steering the rear wheels of a road service vehicle comprises: a steering device (LE) controlled, in turn, in an emergency by an emergency steering signal which controls appropriately and in accordance with ...
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