JPH0447774U

JPH0447774U -

Info

Publication number: JPH0447774U
Application number: JP9093290U
Authority: JP
Priority date: 1990-08-29
Filing date: 1990-08-29
Publication date: 1992-04-23
Anticipated expiration: 2005-08-29
Also published as: JP2529800Y2

Description

[Brief explanation of the drawing]

第１図は送信機ターミナルの外観図、第２図は
入出者計数装置の概要を示す図、第３図は送信機
ターミナルの回路図、第４図は交流磁界の減衰特
性を示すグラフ、第５図はとう道に設置された入
出者計数装置の一実施例を示す図、第６図はロー
タリースイツチの正面図、第７図は送信機ターミ
ナルの内部配線図、第８図は送信機ターミナルか
ら発生する交流磁界を変調する変調信号の信号フ
オーマツト、第９図はとう道の断面図、第１０図
はとう道内における誘導線ループアンテナの配置
状態を示す断面図、第１１図はとう道の断面図、
第１２図ａは終端を抵抗で繋いだ誘導線ループア
ンテナを示す斜視図、第１２図ｂは終端を短絡し
た誘導線ループアンテナを示す斜視図である。１……閉じた空間、３……誘導線ループアンテ
ナ、４……送信機ターミナル、６……中央管理装
置、４１……発振器、４２……送信アンテナ、４
３……変調器、４４……緊急異常スイツチ、４５
……表示ＬＥＤ、４７……ＩＤ設定スイツチ、４
８……警報ブザー、６１……復調器、６２……復
号器、６３……中央管理装置本体。 Figure 1 is an external view of the transmitter terminal, Figure 2 is a diagram showing an outline of the entry/exit counting device, Figure 3 is a circuit diagram of the transmitter terminal, Figure 4 is a graph showing the attenuation characteristics of an alternating magnetic field, Figure 5 shows an example of the entry/exit counting device installed in the tunnel, Figure 6 is a front view of the rotary switch, Figure 7 is the internal wiring diagram of the transmitter terminal, and Figure 8 is the transmitter terminal. Fig. 9 is a cross-sectional view of the tunnel, Fig. 10 is a cross-sectional view showing the arrangement of the guide wire loop antenna in the tunnel, and Fig. 11 is a cross-sectional view of the tunnel. cross section,
FIG. 12a is a perspective view showing a guide wire loop antenna whose terminal ends are connected with a resistor, and FIG. 12b is a perspective view showing a guide wire loop antenna whose terminal ends are short-circuited. 1... Closed space, 3... Guide wire loop antenna, 4... Transmitter terminal, 6... Central management device, 41... Oscillator, 42... Transmission antenna, 4
3...Modulator, 44...Emergency abnormality switch, 45
...Display LED, 47...ID setting switch, 4
8... Alarm buzzer, 61... Demodulator, 62... Decoder, 63... Central management device main body.

Claims

[Scope of claim for utility model registration] A person who enters a closed space such as an underground structure or inside a building is given a transmitter terminal, the closed space is divided into multiple areas, and each area is , a guide wire loop antenna is installed to detect the alternating current magnetic field generated from the transmitter terminal, and the voltage induced in one of the guide wire loop antennas is detected via the signal transmission line to detect the presence of a person entering the premises. An entry/exit counting device for identifying an area includes a transmitting antenna and an oscillator that drives the transmitting antenna with an alternating current signal having a frequency f that is lower than the lowest frequency fo that can emit radio waves from the transmitting antenna, and the oscillator has a A modulator that modulates the AC signal of the frequency f is connected using modulation data including the identification number of the machine terminal and a normal/abnormality display code, and an ID setting switch that sets the identification number and the modulation data contained in the modulation data. An emergency error switch that changes the normal/abnormal display code to an error display state, an emergency indicator or emergency alarm for confirming the operation of the emergency error switch, and a power indicator that monitors the power supply voltage of the transmitter terminal. A transmitter terminal characterized by being provided with.