Title:
PORTABLE TRAIN ADVANCE JUDGING DEVICE
Document Type and Number:
Japanese Patent JP2813609
Kind Code:
B2
Abstract:
PURPOSE: To realize the convenience of conveyance and also prevent worker injury accidents and train operation hindrances by grasping train advance surely and from a distance and in an early stage regardless of day and night.
CONSTITUTION: By making a sound sensor 2 suck on the upper surface or the side of a line 1 by means of a magnet, the vibration of the line 1 following the travel of a train is detected. A transmitting portion 3 filters by means of a filter the signal of a frequency zone (20-30kHz) having the characteristic of vibration following train advance from the signal of the sound sensor 2, and decides train advance to a work site according to signal change by means of a CPU, and sounds through a speaker 24 the composite voice of an alarm generated from a composite voice generating means, and at the same time conducts wireless transmission from a wireless input/output circuit. A receiving portion 5, when it receives a wireless signal, sounds through a speaker 49 the composite voice of the alarm similarly as the transmitting portion 3, and at the same time conducts wireless transmission from the wireless input/out circuit, and makes the composite voice of the alarm sound similarly from a wireless machine 8 carried by a worker.
More Like This:
| JPH07168990 | ALARM GENERATOR |
Inventors:
Jiro Kakuyama
Takashi Kazuhito
Fukuda Masao
Hajime Suzuki
Takashi Kazuhito
Fukuda Masao
Hajime Suzuki
Application Number:
JP23961294A
Publication Date:
October 22, 1998
Filing Date:
September 07, 1994
Export Citation:
Assignee:
Nippon Denshi Kogyo Co., Ltd.
Limited company system supply
Limited company system supply
International Classes:
G08B3/10; B61L1/06; B61L23/00; B61L23/06; H04B7/26; (IPC1-7): B61L23/06; B61L1/06; G08B3/10
Domestic Patent References:
| JP6183346A | ||||
| JP63154465A | ||||
| JP439159A | ||||
| JP4113969A |
Attorney, Agent or Firm:
Keisuke Miyake