JPH08194020A - Wearing type charging detector - Google Patents

Abstract

PURPOSE: To warn a third person, except for a worker at a site, who approaches a high voltage apparatus in the middle of charging by a simple means. CONSTITUTION: A detection electrode 3 to form electrostatic capacity C01 between a high voltage apparatus and a high voltage charging part 2 when a human body approaches the high voltage apparatus, a detection circuit 4 to detect a small electrostatic induction electric current I0 flowing from the high voltage charging part 2 to the human body by the electrostatic capacity C01 connected to the detection electrode 3 and formed between the high voltage charging part 2 and the detection electrode 3 and electrostatic capacity C02 formed between the high voltage charging part 2 and the human body, a warning circuit 5 connected to the detection circuit 4 and to warn in accordance with a detection signal output from the detection circuit 4 and a transmission circuit 6 connected to the detection circuit 4 and to radio transmit the detection signal output from the detection circuit 4 toward a receiver 7 are furnished.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a body-mounted charging detector, and more particularly, when a worker approaches a high voltage device being charged at a substation or the like, it is confirmed that the high voltage device is in a charging state. The present invention relates to a wearable charging detector that alerts an operator to prevent an electric shock accident.

[0002]

2. Description of the Related Art Generally, in a substation or the like, there are not a few cases in which a worker is erroneous or careless and may be killed or seriously injured by an electric shock accident due to contact with a charged high voltage device. As a means to prevent such electric shock accidents,
Workers should carry out their work while wearing a body-worn type charging detector on a part of their body. The body-worn type charging detector detects that a high-voltage device being charged is approaching and at the same time a buzzer or the like. I am trying to warn the worker himself.

[0003]

By the way, in the conventional body-wear type charge detector, the worker himself / herself is the object of warning by a buzzer or the like that a high voltage device being charged is approached. On the other hand, at work sites, it is normal for multiple workers to work under the direction of supervisors and managers, so the managers and managers mentioned above always keep track of the work status of each worker. It is necessary to confirm the safety of each worker. However, as in the past, alerting only the worker himself to approaching a high-voltage device being charged does not mean that all workers are in the sight of the supervisor or responsible person. , It was difficult to recognize the worker in a dangerous situation.

Therefore, the present invention has been proposed in view of the above-mentioned problems, and an object of the present invention is to inform a third party other than an operator on the spot that a high voltage device being charged is approached. An object of the present invention is to provide a wearable type charging detector capable of giving an alarm by a simple means.

[0005]

As a technical means for achieving the above-mentioned object, the present invention provides a device formed between a high voltage charging part and a detection electrode when a high voltage device in a charged state is approached. The detection circuit detects a minute electrostatic induction current that flows from the high-voltage charging section to the human body due to the electrostatic capacity that is generated and the electrostatic capacity that is formed between the human body and the alarm circuit based on the detection signal. In the body-attached charging detector, the transmitter circuit for transmitting the detection signal output from the detection circuit to the receiver by radio is provided.

In the body-wearing type charge detector, it is desirable that the detector body incorporating the detection electrode, the detection circuit, the transmission circuit, and the alarm circuit be detachably attached to the work helmet.

[0007]

In the body-attached charging detector according to the present invention, the detection signal output from the transmission circuit is transmitted by the radio wave because the detection circuit output from the detection circuit is wirelessly transmitted to the receiver. In the receiver received in step 3, the worker accidentally alerts a third party other than the worker that the worker is approaching a high-voltage device being charged, based on the detection signal, so that Prevents danger when approaching live parts.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a body-mounted charging detector according to the present invention will be described with reference to FIGS.

The body-attached charge detector 1 of the present invention [hereinafter, simply
It is called a detector], and as shown in Fig.
When a voltage device is approached, electrostatic capacitance is generated between it and the high voltage charging unit 2.
Quantity C ₀₁Connected to the detection electrode 3 forming the
And is formed between the high voltage charging part 2 and the detection electrode 3.
Capacitance C₀₁, And the electrostatic capacitance C formed between the human body
₀₂The small electrostatic induction that flows from the high voltage charging unit 2 to the human body
Conductive current I₀ Detection circuit 4 for detecting the
Based on the detection signal that is connected and output from the detection circuit 4
And an alarm circuit 5 for issuing an alarm.
Output from the detection circuit 4 connected to the detection circuit 4
Transmission times for wirelessly transmitting the detected signal to the receiver 7
It is equipped with path 6.

The above-mentioned detection circuit 4 operates with a certain constant current [operating current], and when the worker approaches the high-voltage equipment being charged, the high-voltage charging section 2 and the detection electrode 3 are connected. Due to the electrostatic capacitance C ₀₁ formed between them and the electrostatic capacitance C ₀₂ formed between the human body and the human body, a small electrostatic induction current I ₀ flowing from the high voltage charging unit 2 to the human body becomes an operating current. The proper detection level is set. The alarm circuit 5 includes an intermittent signal generation circuit 8 that outputs an intermittent signal based on the detection signal output from the detection circuit 4, and an acoustic frequency oscillator circuit that oscillates based on the output signal from the intermittent signal generation circuit 8. 9 and the output from the acoustic frequency oscillating circuit 9 causes the buzzer 10 incorporated in the detector 1 to ring. Further, the transmission circuit 6 modulates the detection signal output from the detection circuit 4 and wirelessly transmits the modulation signal from a transmission antenna (not shown) built in the detector 1 to the receiver 7.

Since this type of detector 1 requires an operation inspection before starting use, a push-button test switch 11 is turned on to detect a power source battery 12 such as a lithium battery. The respective operation start voltages are applied to the circuit 4, the alarm circuit 5 and the transmission circuit 6 to perform self-diagnosis and check whether or not normal operation is performed.

On the other hand, the receiver 7 includes a receiving circuit 13 connected to a receiving antenna [not shown], an alarm circuit 14 for issuing an alarm based on an output signal from the receiving circuit 13, the receiving circuit 13 and an alarm. A power supply battery 15 for operating the circuit 14 is built in. The alarm circuit 14 is composed of an intermittent signal generating circuit 16 and an acoustic frequency oscillating circuit 17, as in the detector 1 described above, and a receiver 7 is provided with a buzzer 18 which sounds by the output of the acoustic frequency oscillating circuit 17. .
In this receiver 7, the modulated signal wirelessly transmitted from the transmitting circuit 6 of the detector 1 is caught by the receiving antenna and then demodulated by the receiving circuit 13. Based on the demodulated signal, the alarm circuit 1
4 is operated to make the buzzer 18 ring.

In transmission / reception between the detector 1 and the receiver 7, the transmission / reception frequency is set to 320 MHz and the modulation / demodulation frequency is set to 32 kHz. The maximum type is about 50m.

The detector 1 having the above-mentioned circuit configuration adopts the electrostatic induction detection method, and since the detection distance is affected by the ambient conditions, the applicable conditions such as the target voltage, the place of use and the working condition. It is necessary to match with. For example, when it is used for a special high voltage circuit of 22 kV to 77 kV in a substation or the like, it is preferable to use a structure that is attached to a work helmet for the following reasons.

That is, as shown in FIG.
Is installed on the iron pedestal 20, and the worker m usually works on the special high-voltage equipment 19 on the iron pedestal 20 by using a stepladder or an aerial work vehicle. At this time, the special high-voltage equipment 19 to be worked is in a power failure state, but since many special high-voltage equipment 19 are installed in the substation or the like, the worker m selects from among the large number of special high-voltage equipment 19. When the special high-voltage equipment 19 that is the work target is erroneously selected and an attempt is made to work on the special high-voltage equipment 19 that is not in the power failure state, the high-voltage charging unit 2 of the special high-voltage equipment 19 is approached. In this way, when the worker m tries to start work on the special high-voltage equipment 19 on the iron frame 20, the worker who first approaches the high-voltage charging unit 2 of the special high-voltage equipment 19 is the operator. Since the head is m, the detector 1 may be attached to the work helmet 21 that covers the head.

As shown in FIGS. 3 (a) and 3 (b), the detector 1 constructed so as to be attached to the work helmet 21 has band holes 23 at both ends of a detector main body 22 incorporating the above-mentioned constituent circuits. It is assumed that the band 24 is provided and the band 24 is attached to the band hole 23. A sounding hole 25 for a buzzer and a push button 26 which is a test switch are provided on the front surface of the detector body 22, and a slip prevention rubber 27 is attached to the back surface of the detector body 22. This detector 1 is shown in FIG.
As shown in (a) and (b), the band is attached to the work helmet 21 by putting the band 24 on the back side of the work helmet 21 with the detector main body 22 arranged on the front side of the work helmet 21.

On the other hand, the receiver 7 which receives the detection signal from the above-mentioned detector 1 is classified into the pocket type shown in FIGS. 5 (a) and 5 (b) and the installation type shown in FIGS. 6 (a) and 6 (b). ,
The pocket type receiver 7 is of a size that can be inserted into a pocket of work clothes or the like, and the receiver main body 28 has the above-described constituent circuits built therein and leads out the receiving antenna 29. The receiver body 28 is provided with a sounding hole 30 for a buzzer and a power switch 31. Further, the receiver 7 of the installation type is a box-like one having a size that can be carried around, and like the pocket type, the receiver main body 32 has a built-in configuration circuit and the receiving antenna 3
A speaker 34 and a power switch 35 for deriving 3 and emitting a buzzer sound or a synthetic voice are provided.

There is also a type in which the above-mentioned detector 1 and receiver 7 are integrated. This type is shown in Fig. 7 (a).
As shown in (b), the main body 36 is provided with a detection unit 37 having a built-in constituent circuit including a detection circuit in the central portion thereof, and a transmission unit 38 having a transmission circuit incorporated in both side portions extending from the central portion.
And a receiving unit 39 having a built-in receiving circuit.
0 and the receiving antenna 41 are derived. still,
A sounding hole 42 for a buzzer is provided on the front surface of the detecting portion 37 of the main body 36.
Further, a push button 43 which is a test switch and a power switch 44 for the receiving unit are provided, and a non-slip rubber 45 is attached to the back surfaces of the transmitting unit 37 and the receiving unit 39, the transmitting antenna 40 and the receiving antenna 41. Has been done.

As shown in FIG. 8, a worker m puts the detector 1 on the work helmet 21, and a third party n such as a supervisor or a person other than the worker carries the receiver 7 before carrying out the work. Is started. In FIG. 8, the case where the worker m wears the detector 1 of FIGS. 3A and 3B and the third party n carries the pocket type receiver 7 of FIGS. Show.

During the work, when the worker m approaches the high-voltage charging section 2 of the special high-voltage equipment 19 on the iron frame 20,
As shown in FIG. 1, a capacitance C ₀₁ is formed between the high voltage charging unit 2 and the detection electrode 3 of the detector 1, and a capacitance C ₀₂ is formed between the worker m and the operator. . As a result, the minute electrostatic induction current I ₀ flowing from the high-voltage charging unit 2 to the worker m is detected by the detection circuit 4, and the detection signal is output to the alarm circuit 5.
And to the transmission circuit 6. In the alarm circuit 5, an intermittent signal is output from the intermittent signal generating circuit 8 based on the above-mentioned detection signal, the acoustic frequency oscillation circuit 9 oscillates by the intermittent signal, and the buzzer 10 sounds by the output signal. The ringing of the buzzer 10 allows the worker m to recognize that the high voltage charging unit 2 has been approached. On the other hand, in the transmission circuit 6, the detection signal output from the detection circuit 4 is modulated, and the modulated signal is directed from the transmission antenna (not shown) built in the detector 1 to the receiver 7 owned by the third party n. Wirelessly.

In the receiver 7 carried by the third party n, the modulated signal wirelessly transmitted from the transmitting circuit 6 of the detector 1 is caught by the receiving antenna 29 [see FIGS. 4 (a) and 4 (b)]. The receiving circuit 13 demodulates and the alarm circuit 14 is activated based on the demodulated signal. In the alarm circuit 14, similarly to the alarm circuit 5 of the detector 1, the intermittent signal generating circuit 16 outputs an intermittent signal based on the demodulated signal, and the intermittent signal oscillates the acoustic frequency oscillator circuit 17 to generate an output signal. The buzzer 18 sounds. The ringing of the buzzer 18 allows the third party n to recognize that the worker m has approached the high voltage charging unit 2.

[0022]

EFFECT OF THE INVENTION According to the body-attached charging detector of the present invention, since the transmitter circuit for wirelessly transmitting the detection signal output from the detection circuit to the receiver is provided, work for carrying the receiver is carried out. It is possible to promptly alert a third party other than the worker that the worker has approached the high-voltage device being charged, and even if all the workers are out of sight,
It becomes easy for a third party to immediately recognize such a dangerous situation of the worker, and quick action can be taken to further improve safety, and its practical value is great.

[Brief description of drawings]

FIG. 1 is a circuit configuration diagram showing an embodiment of a body-mounted charging detector according to the present invention.

FIG. 2 is a front view showing a special high-voltage device such as a substation for explaining a usage state of the body-mounted charging detector.

FIG. 3 (a) is a plan view showing the external shape of a body-mounted charging detector according to the present invention, and FIG. 3 (b) is a front view thereof.

FIG. 4 (a) is a front view showing a state in which a body-mounted charging detector is mounted on a work helmet, and FIG. 4 (b) is a side view thereof.

5A is a front view showing a pocket-type receiver, and FIG. 5B is a side view thereof.

FIG. 6A is a front view showing an installation type receiver;
(B) Side view

FIG. 7 (a) is a plan view showing a modified example of the body-mounted charging detector according to the present invention, and FIG. 7 (b) is a front view thereof.

FIG. 8 is a front view showing a usage state of a body-mounted charging detector and a receiver in a substation or the like.

[Explanation of symbols]

2 High-voltage charging part 3 Detection electrode 4 Detection circuit 5 Alarm circuit 6 Transmission circuit 7 Receiver C ₀₁ Capacitance formed between high-voltage charging part and detection electrode C ₀₂ Static electricity formed between human body Capacitance I ₀ Electrostatic induction current

Front page continued (72) Inventor Yoshihisa Fujii 3-22 Nakanoshima, Kita-ku, Osaka, Osaka Prefecture 3-22 Kansai Electric Power Co., Inc. (72) Inventor Katsuji Hara 3-3-22 Nakanoshima, Kita-ku, Osaka, Osaka Kansai Inside the Electric Power Company (72) Inventor Shigeru Saida 3-3-22 Nakanoshima, Kita-ku, Osaka City, Osaka Prefecture Kansai Electric Power Company Inside (72) Inventor Yoshihiro Shimamura 3-3-22 Nakanoshima, Kita-ku, Osaka City, Osaka Prefecture Kansai Electric Power Co., Inc. (72) Inventor Sada Fujiwara, 3-29-3 Obamacho, Amagasaki City, Hyogo Prefecture Hasegawa Electric Industry Co., Ltd. (72) Inventor, Yoshihisa Furukawa 3-29-3, Obamacho, Amagasaki City, Hyogo Prefecture No. Hasegawa Electric Co., Ltd.

Claims (2)

[Claims] 1. When a high-voltage device in a charged state is approached, a high voltage is generated due to the electrostatic capacitance formed between the high-voltage charging unit and the detection electrode and the electrostatic capacitance formed between the human body. In the body-mounted charging detector, which detects a minute electrostatic induction current flowing from the charging part to the human body by the detection circuit and issues an alarm based on the detection signal by the alarm circuit, the detection signal output from the detection circuit is received by the receiver. A body wearable charge detector, comprising a transmission circuit for wirelessly transmitting to the body. 2. The detection electrode, the detection circuit, and the transmission circuit,
The body-attached charge detector according to claim 1, wherein a detector main body incorporating an alarm circuit is detachably attached to a work helmet.