CN204405724U - A kind of bracelet-shaped detector of finding out dangerous voltage - Google Patents

Abstract

A bracelet-type detector capable of detecting dangerous voltages, which includes a bracelet-shaped resin shell, a detection coil and an audio alarm circuit. In the resin shell, an alarm circuit installation box is arranged on one side of the resin shell, the circuit board of the audio alarm circuit is installed in the alarm circuit installation box, one end of the detection coil is grounded, and the other end is connected to the trigger signal input end of the audio alarm circuit . The utility model uses the detection coil packaged in the bracelet-shaped resin shell to sense the electromagnetic field around the high-voltage facility, can quickly detect the dangerous voltage and send out the audio alarm signal in time, and effectively prevent the accidents caused by the staff's negligence, illusion or mistake. , especially suitable for electric power construction and maintenance personnel.

Description

A bracelet-style detector that detects dangerous voltages

technical field

The utility model relates to a bracelet-type high-voltage detector which is suitable for electric power construction and maintenance personnel and can send out audio warning signals, and belongs to the technical field of signal devices.

Background technique

During power construction and maintenance operations, workers often come into contact with various types of busbars, wires, switches, safety devices, distribution boxes and other power facilities and devices. In order to prevent electric shock, the staff are generally equipped with helmet-type alarms, but the electric shock casualties caused by the negligence, illusion or mistakes of the staff are still unavoidable. The main reason is that the operator's hands are often closest to the live facilities when working, and the existing helmet-type alarm cannot detect dangerous voltage in time because it is far away from the live facilities, and the time lag for sending out the alarm signal is delayed. Therefore, how to effectively avoid electric shock for electric construction and maintenance personnel has become a difficult problem faced by relevant technical personnel.

Utility model content

The purpose of the utility model is to provide a bracelet-type detector capable of detecting dangerous voltages in view of the disadvantages of the prior art, so as to effectively avoid electric shock accidents.

Problem described in the utility model is realized with following technical scheme:

A bracelet-type detector capable of detecting dangerous voltages, which consists of a bracelet-shaped resin shell, a detection coil and an audio alarm circuit. One side of the resin shell is provided with an alarm circuit installation box, the circuit board of the audio alarm circuit is installed in the alarm circuit installation box, one end of the detection coil is grounded, and the other end is connected to the trigger signal input of the audio alarm circuit end.

The above-mentioned bracelet-type detector that can detect dangerous voltages, the audio alarm circuit includes a signal conditioning circuit, a music chip, a buzzer, a triode, a coupling capacitor and a bias resistor, the input terminal of the signal conditioning circuit is connected to the detection coil, and the output The end is connected to the trigger pin of the music chip, the emitter of the triode is grounded, the base is grounded through a bias resistor and connected to the output pin of the music chip through a coupling capacitor, and the buzzer is the load of the collector of the triode.

The above-mentioned bracelet detector capable of detecting dangerous voltages, the signal conditioning circuit includes a signal amplifier, a diode, a coupling resistor and an anti-interference capacitor, the input terminal of the signal amplifier is connected to the detection coil, and the output terminal is sequentially connected to the music circuit The trigger pin of the chip, one end of the anti-interference capacitor is grounded, and the other end is connected to the trigger pin of the music chip.

In the bracelet-type detector capable of detecting dangerous voltages, the cover of the alarm circuit installation box is provided with a sound outlet, and the sound outlet corresponds to the buzzer welded on the circuit board.

In the aforementioned bracelet-type detector capable of detecting dangerous voltages, the audio alarm circuit is powered by a button battery, and the button battery is installed on the circuit board of the audio alarm circuit.

The utility model uses the detection coil packaged in the bracelet-shaped resin shell to sense the electromagnetic field around the high-voltage facility, can quickly detect the dangerous voltage and send out the audio alarm signal in time, and effectively prevent the accidents caused by the staff's negligence, illusion or mistake. .

The utility model makes the high-voltage detector into a bracelet type, which is worn on the wrist when in use. When a high-voltage danger occurs, the alarm sound is easy to hear, and at the same time, it will not hinder the operator's two-handed operation. It is especially suitable for electric power construction and Used by maintenance personnel.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is further described.

Fig. 1 is a structural representation of the utility model;

Fig. 2 is A-A sectional view;

Fig. 3 is the top view of Fig. 1;

Figure 4 is an electrical schematic diagram of the audio alarm circuit.

The labels in the figure are: 1. Resin shell, 2. Alarm circuit installation box, 3. Box cover, 4. Circuit board, 5. Coil lead wire, 6. Coil skeleton, 7. Sound outlet, U1, music chip, FM , buzzer, L, detection coil, F, signal amplifier, R1, coupling resistor, R2, bias resistor, T, triode, D, diode, C1, anti-interference capacitor, C2, coupling capacitor.

Detailed ways

Referring to Fig. 1, Fig. 2 and Fig. 3, the utility model includes a bracelet-shaped resin shell 1, a detection coil L, a coil frame 6 and an audio alarm circuit, and the circuit board of the audio alarm circuit is installed in the alarm circuit installation box on one side of the resin shell 1 2, the lid 3 of the alarm circuit installation box 2 is provided with a sound hole 7.

When making a bracelet detector, first wind the detection coil L on the ring-shaped coil frame 6 with enameled wire, then put the coil frame 6 and the detection coil L into the cavity of the mold, and then inject resin into the cavity of the mold. The bracelet-shaped resin case 1 is formed after the resin is cured. Finally, the circuit board of the audio alarm circuit is installed in the alarm circuit installation box 2 on one side of the resin shell 1, and the box cover 3 gets final product. When making the resin case 1, the coil lead wire 5 of the detection coil L should be placed in the position of the alarm circuit installation box 2, so as to be connected with the audio alarm circuit.

When electric power construction and maintenance personnel work, the utility model is worn on the wrist, and the detection coil L senses the electric field and the magnetic field signal around the high-voltage equipment to trigger the audio alarm circuit, so that the audio alarm circuit sends an audio alarm signal. Since the structural parameters of the detection coil L are very stable, it has high detection sensitivity.

Referring to Fig. 4, the audio alarm circuit includes a signal conditioning circuit, a music chip U1, a buzzer FM, a bias resistor R2, a transistor T and a coupling capacitor C2. Wherein, the signal conditioning circuit includes a signal amplifier F, a diode D, an anti-interference capacitor C1 and a coupling resistor R1. The signal conditioning circuit is used to amplify and rectify the signal received by the detection coil L and send it to the trigger pin of the music chip U1.

When the trigger pin of the music chip U1 receives the trigger signal, its signal output terminal D/P outputs an audio signal, which is coupled to the base of the transistor T through the coupling capacitor C2, and then amplified by the transistor T to drive the buzzer FM to work , so the buzzer FM sends out an audio warning signal to remind the staff to pay attention to safety and prevent electric shock accidents.

The box cover 3 of the alarm circuit installation box 2 is provided with a sound hole 7, which is convenient for the transmission of the audio alarm signal. The audio alarm circuit is powered by a button battery, which is small in size and easy to install.

Claims (5)

1. can find out the bracelet-shaped detector of dangerous voltage for one kind, it is characterized in that, it comprises bracelet shape resin enclosure (1), detecting coil (L) and audio alarm circuit, described detecting coil (L) be wound on the coil rack (6) of ring-type upper and together with coil rack (6) coaxial packaging in bracelet shape resin enclosure (1), the side of described resin enclosure (1) is provided with warning circuit mounting box (2), the circuit board (4) of described audio alarm circuit is arranged in warning circuit mounting box (2), one end ground connection of detecting coil (L), the trigger pip input end of one termination audio alarm circuit.

2. a kind of bracelet-shaped detector of finding out dangerous voltage according to claim 1, it is characterized in that, described audio alert circuit comprises signal conditioning circuit, Music Clip (U1), hummer (FM), triode (T), coupling capacitance (C2) and biasing resistor (R2), the input termination detecting coil (L) of described signal conditioning circuit, export the trigger pin of termination Music Clip (U1), the grounded emitter of described triode (T), base stage is through biasing resistor (R2) ground connection and connect the output pin of Music Clip (U1) through coupling capacitance (C2), described hummer (FM) is the load of triode (T) collector.

3. a kind of bracelet-shaped detector of finding out dangerous voltage according to claim 2, it is characterized in that, described signal conditioning circuit comprises signal amplifier (F), diode (D), repeating resistance (R1) and anti-interference capacitor (C1), the input termination detecting coil (L) of described signal amplifier (F), output terminal connects the trigger pin of Music Clip (U1) successively through diode (D) and repeating resistance (R1), described anti-interference capacitor (C1) one end ground connection, the trigger pin of a termination Music Clip (U1).

4. a kind of bracelet-shaped detector of finding out dangerous voltage according to claim 3, it is characterized in that, the lid (3) of described warning circuit mounting box (2) is provided with sender (7), and described sender (7) is corresponding with the hummer (FM) be welded on circuit board (4).

5. a kind of bracelet-shaped detector of finding out dangerous voltage according to claim 4, is characterized in that, described audio alert circuit adopts button cell to power, and described button cell is arranged on the circuit board (4) of audio alert circuit.