CN216051918U - Voltage tester - Google Patents
Voltage tester Download PDFInfo
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- CN216051918U CN216051918U CN202122440148.5U CN202122440148U CN216051918U CN 216051918 U CN216051918 U CN 216051918U CN 202122440148 U CN202122440148 U CN 202122440148U CN 216051918 U CN216051918 U CN 216051918U
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Abstract
The utility model discloses a voltage tester, relating to the field of voltage detection, comprising: the magnetic field detection module is used for detecting a magnetic field in the equipment to be detected, converting the magnetic field into alternating current and converting the alternating current into direct current; the amplifying module is used for amplifying the direct current output by the magnetic field detection module; the filtering module is used for filtering the direct current output by the amplifying module; the indicating module is used for indicating that a magnetic field exists in the equipment to be tested when the indicating module emits light, and voltage exists in the equipment to be tested according to an electromagnetic principle; the power supply module is used for supplying direct current to the amplification module; compared with the prior art, the magnetic field detection module is connected with the amplification module, and the magnetic field detection module has the beneficial effects that: compared with the traditional contact type voltage tester, the utility model does not need to contact the equipment to be tested, only needs to move around the equipment to be tested, and detects no magnetic field through the electromagnetic theory so as to judge whether the equipment to be tested has voltage or not, thereby having good safety.
Description
Technical Field
The utility model relates to the field of voltage detection, in particular to a voltage tester.
Background
Electricity has become a fundamental need for humans because almost everything used in our daily lives depends on it. However, if necessary safety precautions are not taken while using electricity or appliances, serious injury or even death may result. Therefore, in the case where safety is to be confirmed using alternating current, for example, installation of new equipment or the like, it is necessary to turn off the power supply and confirm the presence or absence of voltage in the switchboard. The voltage tester is used for detecting and indicating the voltage of equipment such as power cables, electric wires, lighting equipment, circuit breakers, electric wires, power sockets and the like.
The voltage tester on the existing market is often mostly contact detection voltage, through with contact voltage tester and the equipment to be tested contact, judges to have or not have voltage, and equipment to be tested operating voltage is 220V or 380V alternating current, causes the threat to the detection personnel life when appearing the electric leakage, needs the improvement.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to a voltage tester to solve the above problems.
In order to achieve the purpose, the utility model provides the following technical scheme:
a voltage tester, comprising:
the magnetic field detection module is used for detecting a magnetic field in the equipment to be detected, converting the magnetic field into alternating current and converting the alternating current into direct current;
the amplifying module is used for amplifying the direct current output by the magnetic field detection module;
the filtering module is used for filtering the direct current output by the amplifying module;
the indicating module is used for indicating that a magnetic field exists in the equipment to be tested when the indicating module emits light, and voltage exists in the equipment to be tested according to an electromagnetic principle;
the power supply module is used for supplying direct current to the amplification module;
the magnetic field detection module is connected with the amplification module, the amplification module is connected with the filtering module, the power supply module is connected with the amplification module, and the filtering module is connected with the indication module.
As a still further scheme of the utility model: the magnetic field detection module comprises a coil L1, a diode D1, a diode D2, a diode D3, a diode D4 and a capacitor C1, wherein one end of the coil L1 is connected with the anode of the diode D1 and the cathode of the diode D3, the other end of the coil L1 is connected with the anode of the diode D2 and the cathode of the diode D4, the cathode of the diode D1 is connected with the cathode of the diode D2, the capacitor C1 and the amplification module, and the anode of the diode D3 is connected with the anode of the diode D4 and the other end of the capacitor C1.
As a still further scheme of the utility model: the amplifying module comprises a triode V1, a triode V2, a resistor R1 and a resistor R2, the base electrode of the triode V1 is connected with the magnetic field detection module, the emitter electrode of the triode V1 is connected with the base electrode of the triode V2, the collector electrode of the triode V2 is connected with the resistor R2, the collector electrode of the triode V1 is connected with the resistor R1, the other end of the resistor R1 is connected with the other end of the resistor R2 and the power supply module, and the emitter electrode of the triode V2 is connected with the filtering module.
As a still further scheme of the utility model: the power supply module comprises a battery E1 and a diode D6, wherein the positive electrode of the battery E1 is connected with the positive electrode of the diode D6, and the negative electrode of the diode D6 is connected with the amplification module.
As a still further scheme of the utility model: the filtering module comprises a capacitor C2, a capacitor C3 and a resistor R3, one end of the capacitor C2 is connected with the resistor R3 and the amplifying module, the other end of the capacitor C2 is grounded, the other end of the resistor R3 is connected with the capacitor C3 and the indicating module, and the other end of the capacitor C3 is grounded.
As a still further scheme of the utility model: the indicating module comprises a resistor R4, an amplifier U1, a resistor R5, a resistor R6 and a diode D5, wherein the in-phase end of the amplifier U1 is connected with a resistor R4 and a capacitor C3, the other end of the resistor R4 is grounded, the inverting end of the amplifier U1 is connected with the resistor R5 and the resistor R6, one end of the resistor R5 is grounded, the output end of the amplifier U1 is connected with the other end of the resistor R6 and the anode of the diode D5, and the cathode of the diode D5 is grounded.
Compared with the prior art, the utility model has the beneficial effects that: compared with the traditional contact type voltage tester, the utility model does not need to contact the equipment to be tested, only needs to move around the equipment to be tested, and detects no magnetic field through the electromagnetic theory so as to judge whether the equipment to be tested has voltage or not, thereby having good safety.
Drawings
Fig. 1 is a schematic diagram of a voltage tester.
Fig. 2 is a circuit diagram of a voltage tester.
Fig. 3 is an internal schematic diagram of a diode.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.
Referring to fig. 1, a voltage tester includes:
the magnetic field detection module is used for detecting a magnetic field in the equipment to be detected, converting the magnetic field into alternating current and converting the alternating current into direct current;
the amplifying module is used for amplifying the direct current output by the magnetic field detection module;
the filtering module is used for filtering the direct current output by the amplifying module;
the indicating module is used for indicating that a magnetic field exists in the equipment to be tested when the indicating module emits light, and voltage exists in the equipment to be tested according to an electromagnetic principle;
the power supply module is used for supplying direct current to the amplification module;
the magnetic field detection module is connected with the amplification module, the amplification module is connected with the filtering module, the power supply module is connected with the amplification module, and the filtering module is connected with the indication module.
In this embodiment: referring to fig. 2 and 3, the magnetic field detection module includes a coil L1, a diode D1, a diode D2, a diode D3, a diode D4, and a capacitor C1, wherein one end of the coil L1 is connected to the anode of the diode D1 and the cathode of the diode D3, the other end of the coil L1 is connected to the anode of the diode D2 and the cathode of the diode D4, the cathode of the diode D1 is connected to the cathode of the diode D2, the capacitor C1, and the amplification module, and the anode of the diode D3 is connected to the anode of the diode D4 and the other end of the capacitor C1.
A diode is an electronic device made of semiconductor material (silicon, selenium, germanium, etc.). It has one-way conducting performance, that is, when positive voltage is applied to the anode and cathode of the diode, the diode is conducted. When a reverse voltage is applied to the anode and the cathode, the diode is turned off.
When a magnetic induction line passes through the plane of the vertical coil L1 (namely, voltage exists on equipment to be tested), alternating current can be generated and output through a bridge rectifier circuit consisting of the diode D1, the diode D2, the diode D3 and the diode D4, and the bridge rectifier circuit is selected instead of a half-wave rectifier consisting of a single diode because the magnetic field is small, so that the maximum output direct current is ensured as much as possible.
In this embodiment: referring to fig. 2, the amplifying module includes a transistor V1, a transistor V2, a resistor R1, and a resistor R2, a base of the transistor V1 is connected to the magnetic field detection module, an emitter of the transistor V1 is connected to a base of the transistor V2, a collector of the transistor V2 is connected to the resistor R2, a collector of the transistor V1 is connected to the resistor R1, another end of the resistor R1 is connected to another end of the resistor R2, and the power supply module, and an emitter of the transistor V2 is connected to the filter module.
The triode V1 and the triode V2 form a Darlington tube, and the direct current input by the magnetic field detection module is amplified by enough times.
In this embodiment: referring to fig. 2, the power supply module includes a battery E1 and a diode D6, wherein a positive electrode of the battery E1 is connected to a positive electrode of the diode D6, and a negative electrode of the diode D6 is connected to the amplifying module.
The battery E1 supplies power to the transistor V1 and the transistor V2 through the diode D6.
In this embodiment: referring to fig. 2, the filtering module includes a capacitor C2, a capacitor C3, and a resistor R3, one end of the capacitor C2 is connected to the resistor R3 and the amplifying module, the other end of the capacitor C2 is grounded, the other end of the resistor R3 is connected to the capacitor C3 and the indicating module, and the other end of the capacitor C3 is grounded.
The direct current output to the filtering module by the amplifying module is unstable, and the direct current is stabilized through the capacitor C2 and the capacitor C3, so that stable voltage is provided for the indicating module.
In this embodiment: referring to fig. 2, the indication module includes a resistor R4, an amplifier U1, a resistor R5, a resistor R6, and a diode D5, wherein a non-inverting terminal of the amplifier U1 is connected to the resistor R4 and the capacitor C3, the other terminal of the resistor R4 is grounded, an inverting terminal of the amplifier U1 is connected to the resistor R5 and the resistor R6, one terminal of the resistor R5 is grounded, an output terminal of the amplifier U1 is connected to the other terminal of the resistor R6 and the anode of the diode D5, and the cathode of the diode D5 is grounded.
The direct current of filter module input is exported diode D5 through amplifier U1, and diode D5 is emitting diode, and luminous instruction has voltage on the present equipment to be tested, reminds the user of paying attention to.
The working principle of the utility model is as follows: according to the electromagnetic principle, the voltage can be detected by detecting the existence of a non-magnetic field at the equipment to be detected, when the equipment to be detected is not electrified, the magnetic field detection module does not output direct current, and a subsequent circuit does not work; when the equipment to be tested is powered on, the magnetic field detection module outputs direct current, the amplification module amplifies the direct current, the power supply module supplies working voltage for the amplification module, the filtering module performs filtering processing on the direct current amplified by the amplification module and outputs the direct current to the indication module, and the indication module indicates light through the light-emitting diode D5 to display that the current equipment to be tested is powered on and remind users of safety.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. The utility model provides a voltage tester which characterized in that:
this voltage tester includes:
the magnetic field detection module is used for detecting a magnetic field in the equipment to be detected, converting the magnetic field into alternating current and converting the alternating current into direct current;
the amplifying module is used for amplifying the direct current output by the magnetic field detection module;
the filtering module is used for filtering the direct current output by the amplifying module;
the indicating module is used for indicating that a magnetic field exists in the equipment to be tested when the indicating module emits light, and voltage exists in the equipment to be tested according to an electromagnetic principle;
the power supply module is used for supplying direct current to the amplification module;
the magnetic field detection module is connected with the amplification module, the amplification module is connected with the filtering module, the power supply module is connected with the amplification module, and the filtering module is connected with the indication module.
2. The voltage tester as claimed in claim 1, wherein the magnetic field detection module comprises a coil L1, a diode D1, a diode D2, a diode D3, a diode D4 and a capacitor C1, one end of the coil L1 is connected with the anode of the diode D1 and the cathode of the diode D3, the other end of the coil L1 is connected with the anode of the diode D2 and the cathode of the diode D4, the cathode of the diode D1 is connected with the cathode of the diode D2, the capacitor C1 and the amplification module, and the anode of the diode D3 is connected with the anode of the diode D4 and the other end of the capacitor C1.
3. The voltage tester as claimed in claim 1, wherein the amplifying module comprises a transistor V1, a transistor V2, a resistor R1, and a resistor R2, wherein the base of the transistor V1 is connected to the magnetic field detection module, the emitter of the transistor V1 is connected to the base of the transistor V2, the collector of the transistor V2 is connected to the resistor R2, the collector of the transistor V1 is connected to the resistor R1, the other end of the resistor R1 is connected to the other end of the resistor R2 and the power supply module, and the emitter of the transistor V2 is connected to the filter module.
4. The voltage tester according to claim 1, wherein the power supply module comprises a battery E1 and a diode D6, the anode of the battery E1 is connected with the anode of the diode D6, and the cathode of the diode D6 is connected with the amplification module.
5. The voltage tester of claim 1, wherein the filtering module comprises a capacitor C2, a capacitor C3 and a resistor R3, one end of the capacitor C2 is connected with the resistor R3 and the amplifying module, the other end of the capacitor C2 is grounded, the other end of the resistor R3 is connected with the capacitor C3 and the indicating module, and the other end of the capacitor C3 is grounded.
6. The voltage tester as claimed in claim 5, wherein the indication module comprises a resistor R4, an amplifier U1, a resistor R5, a resistor R6 and a diode D5, the in-phase end of the amplifier U1 is connected with a resistor R4 and a capacitor C3, the other end of the resistor R4 is grounded, the reverse-phase end of the amplifier U1 is connected with the resistor R5 and a resistor R6, one end of the resistor R5 is grounded, the output end of the amplifier U1 is connected with the other end of the resistor R6 and the anode of the diode D5, and the cathode of the diode D5 is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122440148.5U CN216051918U (en) | 2021-10-11 | 2021-10-11 | Voltage tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122440148.5U CN216051918U (en) | 2021-10-11 | 2021-10-11 | Voltage tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216051918U true CN216051918U (en) | 2022-03-15 |
Family
ID=80608601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122440148.5U Active CN216051918U (en) | 2021-10-11 | 2021-10-11 | Voltage tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216051918U (en) |
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2021
- 2021-10-11 CN CN202122440148.5U patent/CN216051918U/en active Active
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