Electronic product leakage current rapid detection device

Abstract

The utility model relates to electronic equipment safety detection technical field, concretely relates to a kind of electronic product leakage current rapid detection device, comprising: shell, current sensor, signal conditioning circuit, main control unit, display alarm module and power module, the rear surface of the shell is fixedly installed with magnetic circle, current sensor is embedded in the inside of magnetic circle structure, and insulating layer is provided between magnetic circle and current sensor. The utility model overcomes the deficiency of prior art, when electronic product occurs leakage, weak magnetic field is generated around loop, high sensitivity hall sensor can non-contact detect the intensity of this magnetic field, and it is converted into electric signal, to indirectly measure the size of leakage current, traditional current detection needs to be connected in series in circuit, while high sensitivity hall sensor only needs to be close to live conductor to detect, avoid interference equipment normal work, sensor and measured circuit are coupled through magnetic field, realize electrical isolation, reduce the risk of electric shock.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic equipment safety detection technical field, concretely is a kind of electronic product leakage current rapid detection device. BACKGROUND

[0002] Insulation performance of electronic product (such as power adapter, charger, household appliance etc.) directly influences user safety, leakage current is important index of insulation performance, leakage current refers to the current leakage phenomenon in electrical equipment or circuit caused by not completely or other reasons of insulating material, and this leakage current is usually caused by power supply to reach ground or other ground, leakage current can affect personal safety and normal operation of equipment, so corresponding monitoring and control are required;

[0003] Traditional detection method usually relies on laboratory equipment, there are problems, such as complex operation, long time consumption, high cost, and existing portable detection device is often insufficient in precision or slow in response speed, cannot satisfy on-site rapid detection demand;

[0004] To solve the above-mentioned technical problem, for this, a kind of electronic product leakage current rapid detection device is presented. SUMMARY

[0005] In view of the deficiencies of the prior art, the utility model provides a kind of electronic product leakage current rapid detection device, overcome the deficiencies of prior art, solve the problems mentioned in the above background.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a kind of electronic product leakage current rapid detection device, comprising: shell, current sensor, signal conditioning circuit, main control unit, display alarm module and power module;

[0007] The rear surface of the shell is fixedly installed with magnetic ring, the current sensor is embedded in the inside of magnetic ring structure, and an insulating layer is arranged between the magnetic ring and the current sensor;

[0008] The current sensor is connected with signal conditioning circuit, the output end of signal conditioning circuit is connected with main control unit, and the main control unit drives display alarm module and power module respectively.

[0009] The device is connected to the power supply end of the electronic product to be measured through an adaptive interface, is adsorbed on the shell or power cord of the electronic product to be measured through a magnetic ring, and the magnetic ring is usually made of a weak magnetic material (such as a neodymium magnet), and the static magnetic field thereof is much smaller than the dynamic magnetic field generated by the leakage current, so that the interference can be ignored; the sensor is embedded in the inside of the magnetic adsorption structure, so that the sensor is tightly attached to the surface to be measured, and the leakage current magnetic field is maximized; the magnetic adsorption structure and the sensor are isolated by an insulating material, so that the sensor circuit and the electronic product to be measured are prevented from forming an electrical path; the high-sensitivity Hall sensor collects the leakage current signal in real time, converts the leakage current signal into a digital signal through amplification and filtering by an analog-to-digital conversion unit, and the microcontroller compares the effective value of the leakage current with a preset threshold value, and if the threshold value is exceeded, the buzzer and the double-color LED alarm indicator light alarm.

[0010] As a preferred technical scheme of the present application, the current sensor is a high-sensitivity Hall sensor, and the range covers 0.1mA-10mA.

[0011] The high-sensitivity Hall sensor can non-contact measure the leakage current of the electronic product to be measured.

[0012] As a preferred technical scheme of the present application, the signal conditioning circuit includes an instrument amplifier, a second-order low-pass filter, and an analog-to-digital conversion unit.

[0013] The instrument amplifier, the second-order low-pass filter, and the analog-to-digital conversion unit can convert the sensor signal into a digital signal.

[0014] As a preferred technical scheme of the present application, the display and alarm module integrates an OLED screen, a buzzer, and a double-color LED alarm indicator light, the OLED screen is arranged and installed on the front surface of the shell, the buzzer is fixedly installed on the left and right sides of the shell, and the double-color LED alarm indicator light is fixedly installed on the top of the shell.

[0015] The OLED screen can display the leakage current value, and the buzzer and the double-color LED alarm indicator light can alarm when the leakage current value exceeds the preset threshold value.

[0016] As a preferred technical scheme of the present application, the power module is composed of a lithium battery, and the lithium battery is detachably installed between the shell.

[0017] The lithium battery supplies power to the device.

[0018] As a preferred technical scheme of the present application, the front surface of the shell below the adjusting button is provided with an adaptive interface, and the adaptive interface is connected with the lithium battery circuit, and the adaptive interface includes a USB-A interface, a Type-C interface, and a DC interface.

[0019] Compatible with multiple plug types through USB-A interface, Type-C interface and DC interface, supports fast access to the device under test.

[0020] Compared with the prior art, the utility model has the advantages that:

[0021] When the electronic product leaks electricity, the leakage current from the power line to the shell through the insulating layer forms a closed loop, and a weak magnetic field is generated around the loop, the high-sensitivity Hall sensor can non-contact detect the strength of the magnetic field and convert it into an electric signal, thereby indirectly measuring the size of the leakage current, the traditional current detection needs to be connected in series in the circuit, and the high-sensitivity Hall sensor can detect the charged conductor only by approaching, avoiding interference with the normal work of the equipment, the sensor and the measured circuit are coupled through a magnetic field, realizing electrical isolation and reducing the risk of electric shock. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a schematic view of the utility model Figure 1 ;

[0023] Figure 2 is a schematic view of the utility model Figure 2 ;

[0024] Figure 3 is a schematic view of the utility model

[0025] Figure 4 is a schematic view of the utility model

[0026] In the figure: 1, shell; 2, OLED screen; 3, adjusting button; 4, USB-A interface; 5, Type-C interface; 6, DC interface; 7, lithium battery; 8, magnetic ring; 9, high-sensitivity Hall sensor; 10, insulating layer; 11, microcontroller; 12, instrument amplifier; 13, second-order low-pass filter; 14, buzzer; 15, double-color LED alarm indicator light; 16, analog-to-digital conversion unit. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0028] Please refer to Figures 1-4A rapid leakage current detection device for electronic products includes: a housing 1, a current sensor, a signal conditioning circuit, a main control unit, a display alarm module, and a power supply module. A magnetic ring 8 is fixedly installed on the rear surface of the housing 1. The current sensor is embedded inside the structure of the magnetic ring 8, and an insulating layer 10 is provided between the magnetic ring 8 and the current sensor. The current sensor is connected to the signal conditioning circuit, and the output terminal of the signal conditioning circuit is connected to the main control unit. The main control unit drives the display alarm module and the power supply module respectively. The device is connected to the power supply terminal of the electronic product under test through an adaptive interface. It is attracted to the surface of the housing or power cord of the device under test by the magnetic ring 8. The sensor 8 typically uses a weak magnetic material such as a neodymium magnet, whose static magnetic field is much smaller than the dynamic magnetic field generated by the leakage current, so the interference is negligible. The sensor is embedded inside the magnetic structure to ensure that it is in close contact with the surface being measured, maximizing the capture of the leakage current magnetic field. The magnetic structure and the sensor are isolated by insulating material to prevent the sensor circuit from forming an electrical path with the device under test. The high-sensitivity Hall sensor 9 collects the leakage current signal in real time, which is amplified and filtered and then converted into a digital signal by the analog-to-digital converter 16. The microcontroller 11 calculates the effective value of the leakage current and compares it with a preset threshold. If the limit is exceeded, the buzzer 14 and the dual-color LED alarm indicator 15 are triggered to sound an alarm.

[0029] Specifically, the current sensor is a high-sensitivity Hall sensor 9 with a range of 0.1mA-10mA. The high-sensitivity Hall sensor 9 enables non-contact measurement of the leakage current of the device under test.

[0030] Specifically, the signal conditioning circuit includes an instrumentation amplifier 12, a second-order low-pass filter 13, and an analog-to-digital converter 16, which can convert sensor signals into digital signals.

[0031] Specifically, the display alarm module integrates an OLED screen 2, a buzzer 14, and a dual-color LED alarm indicator 15. The OLED screen 2 is mounted on the front surface of the housing 1, the buzzer 14 is fixedly mounted on the left and right sides of the housing 1, and the dual-color LED alarm indicator 15 is fixedly mounted on the top of the housing 1. The OLED screen 2 can display the leakage current value, and the buzzer 14 and the dual-color LED alarm indicator 15 can trigger an alarm when the leakage current value exceeds a preset threshold.

[0032] Specifically, the power module consists of a lithium battery 7, which is detachably installed from the housing 1, and the device is powered by the lithium battery 7.

[0033] Specifically, an adaptive interface is provided on the front surface of the housing 1 below the adjustment button 3, and the adaptive interface is connected to the lithium battery 7 circuit. The adaptive interface includes a USB-A interface 4, a Type-C interface 5, and a DC interface 6. It is compatible with multiple plug types through the USB-A interface 4, Type-C interface 5, and DC interface 6, and supports quick connection to the device under test.

[0034] Working principle: The magnetic ring 8 is adsorbed onto the surface of the casing or power cord of the device under test. The magnetic ring 8 is usually made of weak magnetic material, and its static magnetic field is much smaller than the dynamic magnetic field generated by the leakage current, so the interference is negligible. The sensor is embedded in the magnetic structure to ensure that it is in close contact with the surface under test, so as to maximize the capture of the leakage current magnetic field. The magnetic structure and the sensor are isolated by insulating material to avoid the sensor circuit from forming an electrical path with the device under test. The high-sensitivity Hall sensor 9 collects the leakage current signal in real time. After amplification and filtering, it is converted into a digital signal by the analog-to-digital converter 16. The microcontroller 11 calculates the effective value of the leakage current and compares it with the preset threshold. If the limit is exceeded, the buzzer 14 and the dual-color LED alarm indicator 15 are triggered to sound an alarm.

[0035] Finally, it should be noted that in the description of this utility model, the terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0036] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A rapid leakage current detection device for electronic products, characterized in that, include: Housing (1), current sensor, signal conditioning circuit, main control unit, display alarm module and power supply module; A magnetic ring (8) is fixedly installed on the rear surface of the housing (1), the current sensor is embedded inside the magnetic ring (8) structure, and an insulating layer (10) is provided between the magnetic ring (8) and the current sensor. The current sensor is connected to the signal conditioning circuit, and the output of the signal conditioning circuit is connected to the main control unit. The main control unit drives the display alarm module and the power supply module respectively.

2. The electronic product leakage current rapid detection device according to claim 1, characterized in that: The current sensor is a high-sensitivity Hall sensor (9) with a range of 0.1mA-10mA. The main control unit is a microcontroller (11) used to analyze the leakage current amplitude and its changing trend in real time.

3. The electronic product leakage current rapid detection device according to claim 1, characterized in that: The signal conditioning circuit includes an instrumentation amplifier (12), a second-order low-pass filter (13), and an analog-to-digital converter (16).

4. The electronic product leakage current rapid detection device according to claim 1, characterized in that: The display alarm module integrates an OLED screen (2), a buzzer (14) and a dual-color LED alarm indicator (15). The OLED screen (2) is mounted on the front surface of the housing (1), the buzzer (14) is fixedly mounted on the left and right sides of the housing (1), and the dual-color LED alarm indicator (15) is fixedly mounted on the top of the housing (1).

5. The electronic product leakage current rapid detection device according to claim 1, characterized in that: The power module is composed of a lithium battery (7), and the lithium battery (7) is detachably installed from the housing (1).

6. The electronic product leakage current rapid detection device according to claim 1, characterized in that: An adaptive interface is provided on the front surface of the housing (1) below the adjustment button (3), and the adaptive interface is connected to the lithium battery (7) circuit.

7. The electronic product leakage current rapid detection device according to claim 6, characterized in that: The adaptive interface includes a USB-A interface (4), a Type-C interface (5), and a DC interface (6).

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