Capability verification device for low power point test of electrical product

Abstract

The utility model provides an electrical product low power point test capability verification device, which is characterized in that four test terminals are arranged in a test box, the four test terminals are respectively and correspondingly connected with four test circuits, the four test circuits are respectively and correspondingly provided with four current sensors, the four test terminals are respectively in communication connection with a control port of a single-chip microcomputer, and the single-chip microcomputer is in communication connection with the control port of the single-chip microcomputer. The input voltage and the output voltage of the single-chip microcomputer are both direct current 5V, the single-chip microcomputer sets the four test circuits at power points 15.2 W, 15.1 W, 14.8 W and 14.5 W for protection respectively, the single-chip microcomputer is provided with a state switching module, and the four test circuits are switched through the state switching module; the test box provided by the utility model comprises four test terminals for testing four groups of data which are all points with power close to 15W, so that the capability of determining low-power points in laboratories is assessed, the technical capability and level of laboratory engineers can be assessed, the difference between the laboratories can be identified, the reproducibility and mutual identification degree of detection data between the laboratories are improved, and the test efficiency is improved. And laboratory technical capability improvement is promoted.

Description

Technical Field

[0001] This utility model relates to the field of low power point testing technology, and in particular to a capability verification device for low power point testing of electrical products. Background Technology

[0002] Low-power point testing of electrical products is a fundamental test in electrical safety inspection and an important testing item for CCC certification and medical device registration certificates. With the development of technology, electrical products, including home appliances, audio and video equipment, power tools, information technology products, electric toys, and medical products, are becoming increasingly intelligent. Their electronic circuits are becoming more and more complex, and potential safety hazards are becoming increasingly difficult to detect. Therefore, the measurement of low-power points is becoming increasingly important.

[0003] Finding low-power points in electronic circuits through measurement not only tests an engineer's ability to analyze circuits based on the specific wiring and components of the product, but also examines their experience in selecting correct test points and constructing reasonable test circuits. When the initial measurement point is not properly selected, continuous trial and adjustment are required. Therefore, this test places high demands on the personnel, equipment, and environment of the laboratory. Summary of the Invention

[0004] The purpose of this invention is to provide a low-power point testing device for electrical products.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A low-power point testing device for electrical products, characterized in that it includes a microcontroller, a protection circuit, a peripheral interface circuit, and a test box. The test box contains a first test terminal, a second test terminal, a third test terminal, and a fourth test terminal. The first, second, third, and fourth test terminals are respectively connected to a first test line, a second test line, a third test line, and a fourth test line. A first current sensor, a second current sensor, a third current sensor, and a fourth current sensor are respectively installed on the first, second, third, and fourth test lines. The first, second, third, and fourth test terminals are communicatively connected to the control port of the microcontroller. The microcontroller has both an input voltage and an output voltage of 5V DC. The microcontroller sets the power points of the first, second, third, and fourth test lines to 15.2W, 15.1W, 14.8W, and 14.5W respectively for protection. The microcontroller includes a state switching module for switching between the first, second, third, and fourth test lines.

[0007] Furthermore, the protection circuit includes a reverse polarity protection module and a voltage and current protection module.

[0008] Furthermore, the microcontroller is equipped with a reset module, an error alarm module, and a reset module.

[0009] Furthermore, the microcontroller is equipped with an RS485 communication module.

[0010] This invention designs a capability verification device for low-power point testing of electrical products. The device's test box contains four test terminals and tests four sets of data, all of which are points with power close to 15W. This allows the laboratory to assess its ability to determine low-power points, which is beneficial for assessing the technical ability and level of laboratory engineers, identifying differences between laboratories, improving the reproducibility and mutual recognition of test data between laboratories, and promoting the improvement of laboratory technical capabilities. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the system structure of this utility model;

[0012] Figure 2 This is the peripheral circuit diagram of the microcontroller of this utility model.

[0013] Figure label:

[0014] 1. Controller, 2. Protection Circuit

[0015] 3 First test terminal, 4 Second test terminal, 5 Third test terminal, 6 Fourth test terminal,

[0016] 7 First test line, 8 Second test line, 9 Third test line, 10 Fourth test line,

[0017] 11 First current sensor, 12 Second current sensor, 13 Third current sensor,

[0018] 14 Fourth current sensor, 15 Fifth terminal. Detailed Implementation

[0019] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0020] This embodiment discloses a capability verification device for low-power point testing of electrical products, such as... Figure 1As shown, the system includes a controller 1, a protection circuit 2, a peripheral interface circuit, and a test box. The controller 1 uses an ATmega168V-10AI microcontroller. The test box is equipped with a first test terminal 3, a second test terminal 4, a third test terminal 5, and a fourth test terminal 6. The first test terminal 3, the second test terminal 4, the third test terminal 5, and the fourth test terminal 6 are respectively connected to a first test line 7, a second test line 8, a third test line 9, and a fourth test line 10. The first test line 7, the second test line 8, the third test line 9, and the fourth test line 10 are respectively equipped with a first current sensor 11, a second current sensor 12, a third current sensor 13, and a fourth current sensor 14.

[0021] The first test terminal 3, the second test terminal 4, the third test terminal 5, and the fourth test terminal 6 are respectively connected to the control port of the microcontroller U1. The input voltage and output voltage of the microcontroller U1 are both DC 5V. The first test line 7, the second test line 8, the third test line 9, and the fourth test line 10 are set to power points of 15.2W, 15.1W, 14.8W, and 14.5W respectively for protection by the microcontroller U1.

[0022] The microcontroller U1 is equipped with a state switching module, which switches between the first test line 7, the second test line 8, the third test line 9 and the fourth test line 10. The state switching function is displayed by the external buttons and indicator lights of the microcontroller U1.

[0023] Protection circuit 2 includes a reverse polarity protection module and a voltage and current protection module, such as... Figure 2 As shown, the voltage and current protection module includes a set of CJ2310 field-effect transistors and a dual MOS power transistor FS8205 between the input IN and output OUT terminals. The CJ2310 field-effect transistors are used for current control and voltage regulation, and the dual MOS power transistor FS8205 provides overcharge, over-discharge and short-circuit protection. The voltage and current protection module and the microcontroller U1 are connected through an analog-to-digital converter ADS1110.

[0024] The U1 microcontroller is equipped with a reset module, an error alarm module, and a reset module, such as... Figure 1 As shown, the test box also has a fifth terminal 15, which is connected to the Reset module and the Warning module.

[0025] like Figure 2 As shown, the microcontroller U1 is equipped with an RS485 communication module, which uses the MAX485 chip to realize half-duplex RS485 communication of the microcontroller U1.

[0026] The microcontroller U1 integrates six power measurement logic channels, corresponding to pins 23-28 respectively. In this embodiment, power measurement uses three logic channels, pins 25-28. The four power values, 15.2W, 15.1W, 14.8W, and 14.5W, are pre-programmed into the microcontroller U1. The positive terminal is divided into four paths and sent to the four channels. The microcontroller will give a signal prompt when a power point triggers a certain channel.

[0027] The prompt signal is output through pins 23 and 24. The user can choose to continue working or stop working according to the prompt. After stopping working, the user can also choose to reset so that the microcontroller can continue.

[0028] like Figure 2 As shown, the microcontroller U1 has an external 5V protection circuit, such as diode D1. When the 5V voltage is too high, diode D1 breaks down, thereby protecting the electronic components of the entire circuit, especially the microcontroller U1.

[0029] RS485 level transceiver U2 and analog-to-digital converter U3 work together with microcontroller U1 to process the received and transmitted signals. The first power transistor Q1 and the second power transistor Q2 rectify synchronously. When the input 5V fluctuates, the output duty cycle is adjusted to keep the output stable at 5V.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A capability verification device for low-power point testing of electrical products, characterized in that, The system includes a microcontroller, a protection circuit, peripheral interface circuits, and a test box. The test box contains a first test terminal, a second test terminal, a third test terminal, and a fourth test terminal. These terminals are respectively connected to a first test line, a second test line, a third test line, and a fourth test line. Each of these test lines is equipped with a first current sensor, a second current sensor, a third current sensor, and a fourth current sensor. The first, second, third, and fourth test terminals are communicatively connected to the control port of the microcontroller. The microcontroller has a DC input voltage and an output voltage of 5V. The microcontroller sets the power points of the first, second, third, and fourth test lines to 15.2W, 15.1W, 14.8W, and 14.5W for protection, respectively. The microcontroller includes a state switching module that switches between the first, second, third, and fourth test lines.

2. The capability verification device for low-power point testing of electrical products according to claim 1, characterized in that, The protection circuit includes a positive and negative reverse connection protection module and a voltage and current protection module.

3. The capability verification device for low-power point testing of electrical products according to claim 1, characterized in that, The microcontroller is equipped with a reset module, an error alarm module, and a reset module.

4. The capability verification device for low-power point testing of electrical products according to claim 1, characterized in that, The microcontroller is equipped with an RS485 communication module.

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