JPS60114774A - Electric field detecting apparatus - Google Patents

Abstract

PURPOSE:To make it possible to perform the security of safety to an electrician, the detection of the danger of the striking of a thunderbolt and the positional detection of a live wire, by issuing an alarm when the human body is positioned in an electric field. CONSTITUTION:In electric work, when the human body approaches an electric field generated from a live wire, voltage is induced in the coil part 3 provided to a housing 1 formed into a wristwatch shape and for obtaining reference potential upon the contact with the human body. Because of this, an alarm sound is generated from a speaker SP through FFTQ1 and an oscillator OSC. When the intensity of an electric field increases, a duty ratio changes and the ON-time of the oscillator OSC becomes long and, therefore, said alarm sound is confirmed as if its frequency becomes high. As a result, because the danger of an electric shock or the dangerous degree thereof can be known by said alarm sound, electric work can be safely performed corresponding to a line state.

Description

[Detailed description of the invention] (Industrial field of application) The present invention prevents electric shock accidents by keeping the device on the arm or other parts of the body at all times, and detects the entire location of buried live wires. The present invention relates to an electric field detection device that can detect lightning strikes and detect the danger of lightning strikes in advance.

(Prior Art) In general, those engaged in electrical work need to pay close attention to the entire condition of electrical lines, but conventionally they have only paid attention to the opening and closing of opening/closing grease. Therefore, a small and lightweight electric field detection device has been desired to prevent serious accidents.

Furthermore, there has been no simple and accurate means to detect the risk of lightning strikes outdoors. I rarely need a device that can do this.

(Object of the Invention) The present invention has been made in view of the above-mentioned points), and its purpose is to improve the safety of electrical workers by configuring the system to issue an alarm when a human body is located within a predetermined electric field. The present invention provides a device ii that can ensure complete security. Another object of the present invention is to provide a device capable of detecting the risk of lightning strikes in advance and also detecting the location of buried live wires.

(Structure of the Invention) The electric field detection device according to the present invention includes a casing in which an electrode gold serving as a reference potential is biased, a coil portion disposed on the same casing, and a force i of the coil portion when positioned within an electric field. It is equipped with a detection section for detecting the entire potential difference between the voltage induced in the coil section and the reference potential, and an alarm generation section that generates an alarm according to the output from the detection section, and these are all integrally formed. This is what I did.

(Example) An explanation will be given based on an example in which an electric field detection device according to the present invention is incorporated into a wristwatch.

In the figure, 1 indicates the entire electric field detection device, and its housing 2 is shaped like a wristwatch. Reference numeral 3 denotes a coil portion provided within the housing 2, which is preferably arranged in a loop shape around the outer periphery of the housing 2. A high dielectric material 1-4 is formed inside the coil portion 3 for electrical insulation of a watch or the like. Reference numeral 5 denotes an electrode provided on the back of the wristwatch, which obtains a reference potential by contacting the human body. Reference numeral 6 denotes a detection section provided in the housing 2, for detecting the potential difference between the voltage induced in the coil section 3 and the reference potential when the coil section 3 is located within an electric field. It is something. Reference numeral 7 denotes an alarm generation section, and by driving a speaker 8Pi, an alarm corresponding to the output from the detection section 6 is sounded from a hole H provided on the surface of the housing 2. The detection section 6
The circuit configuration of the alarm generator 7 is shown in FIG. Coil part 3
The difference between the voltage generated in and the reference voltage (5) t-FETQ,
The oscillation Bosch is activated by the output, and the oscillation signal is fully amplified by the transistor Q, and the speaker 8Pi
It is designed to be driven. Note that as the main alarm generation section 7, a display signal generation aW such as an LFiD may be used.

In the figure, %B indicates 'battery'. Note that the % operating sensitivity is for coil section 3.
It can be increased or decreased by changing the number of turns or the amplification factor of the amplifier.

Above, there is one or more bears 'c' in the casing 2? Other than the f part.

In this embodiment, a watch L8I8. It has a built-in liquid crystal display panel 9, etc., and operates using the battery B as a common power source. The electric field detection device configured as described above is used by attaching it to the arm or body near the belt 1o when doing electrical work, golfing, etc., or recreationally in areas where lightning or the like occurs.

Next, an operation example will be explained based on FIG. 4. In the case of electrical work, an electric field as shown in the figure is generated in the live wires 12, so when the electric field detection device according to the present invention approaches this electric field, a voltage is induced in the coil portion 3. Therefore, FETQ...
oscillator os.

An alarm sound is generated from the speaker sp via the speaker sp.

This alarm tone changes depending on the strength of the electric field.

For example, when the electric field becomes stronger, the duty ratio changes and the on time of the oscillation 1i70so becomes longer, so the alarm sound sounds as if the frequency has become higher. Then,
The warning sound alerts the operator to the danger of electric shock and its dangers, so construction work can be carried out in complete safety according to the track conditions. This electric field detection device is also used during construction work on ground walls, floors, etc.
By bringing 1 close to these lines, it is possible to detect the entire position and wiring direction of the stained line, and during maintenance etc., work can be carried out according to the condition of the electric line, which helps prevent danger to workers.

Furthermore, when playing golf or recreational activities in areas where lightning frequently occurs, for example in the northern Kanto region, if leaders, caddies, etc. wear it on their wrists, they will be protected from 90% damage caused by small lightning strikes.
Since this device emits a warning sound, it is possible to evacuate before a large lightning strike, thereby preventing the danger of lightning strikes.

(Effects of the Invention) According to the electric field detection device according to the present invention, the electric field detection device is built into the housing and is worn close to the entire human body. It is possible to quickly detect this and issue a warning, thereby preventing accidents.It also has excellent features such as being able to easily detect the position and direction of buried live wires.

[Brief explanation of drawings]

The drawings show an embodiment of the electric field detection device according to the present invention, and 18
1 is a partially cutaway perspective view, FIG. 2 is a plan view showing the internal structure, FIG. 3 is a circuit diagram, and FIG. 4 is a perspective view showing an example of use. l: electric field detection device, 2: housing, 3: coil section. 5: electrode, 6: detection section, 7: alarm generation section. %8' [Applicant Katy Gi 1 Co., Ltd. Takashi Iwafuji Agent Patent attorney Isamu Kakiuchi

Claims (1)

[Claims] a housing provided with electrodes having various reference potentials; a coil portion disposed within the housing; and a coil portion provided within the housing, which is induced in the coil portion unless the coil portion is located within the normal field. a detection unit for detecting the entire potential difference between the activation and the reference potential;
An electric field detection device that is provided in the housing and includes an alarm generation section that generates all electric signals depending on the direction of output from the detection section.