Low power circuit integrated junction box

Abstract

The utility model discloses a low power circuit integration junction box, including casing, modular interface array, embedded control module and safety protection module, wherein, the modular interface array contains at least three kinds of specifications test terminal, and each test terminal is connected with the measured circuit board through the elastic contact, embedded control module contains microprocessor, programmable signal generator and AD conversion unit. In addition, the low power circuit integration junction box still includes power module and wireless communication module. The utility model provides junction box through using S3C2451 embedded control processor to realize the automatic measurement and judgement of low power point fast, and can save the various measurement parameters of detected through programmable signal generator and AD conversion unit, then through wireless communication module carries out data transmission, and the convenient implementation detection result inquiry and transmission have improved the detection efficiency, and the detection result also has higher measurement accuracy and good repeatability.

Description

Technical Field

[0001] This utility model relates to the field of electric toy testing technology, and in particular to an integrated junction box for low-power circuits. Background Technology

[0002] Toys are products designed for children with weak awareness of safety, and their quality is directly related to children's health and safety. With continuous economic and technological progress, people's toy consumption structure and levels are also constantly improving, and the proportion of high-value-added electric toys in toy production and sales is gradually increasing. Compared with ordinary electric toys, electric toys containing electronic control circuits have richer functions and more complex structures, but they also bring more safety hazards.

[0003] According to the current national standard for electric toys, GB19865-2005 "Safety of Electric Toys," an important test item for electronic circuits is measuring and determining the low-power point of the electronic circuitry in electric toys. Determining whether the electronic circuitry in an electric toy is a low-power circuit is a prerequisite for conducting fault simulation tests. Section 9.8.1 of the national standard GB19865-2005 clearly stipulates that: The electric toy is powered by its rated voltage, and a variable resistor adjusted to its maximum resistance value is connected between the point under investigation and the opposite pole of the power supply. The resistance value is then gradually decreased until the power consumed by the resistor reaches its maximum value. At the end of the 5th second, if the maximum power supplied to the resistor does not exceed 15W, then that point and points closer to the power supply are called low-power points; the portion of the circuit farther from the power supply than the low-power point is considered a low-power circuit.

[0004] Low-power point testing is a mandatory safety inspection for electric toys containing electronic circuitry. However, national standards for electric toys only specify the technical requirements for test samples and do not provide detailed descriptions of testing equipment. Currently, testing institutions typically use a combination of traditional variable resistors and wattmeters to measure low-power circuits. While this method is simple in principle, in actual testing, due to improper selection of resistance values ​​or improper operation, low-power points are easily overlooked, making it difficult to accurately locate the true low-power point. Furthermore, traditional circuit junction boxes often suffer from poor power matching, high energy loss, and low testing accuracy in low-power testing scenarios; the limitations of traditional low-power point testing junction boxes are particularly evident when performing performance testing on electric toys in low-power modes. Therefore, this patent application is filed. Utility Model Content

[0005] The purpose of this utility model is to provide an integrated junction box for low-power circuits.

[0006] To achieve the above objectives, the solution of this utility model is:

[0007] A low-power integrated junction box, comprising:

[0008] The device comprises a housing, a modular interface array, an embedded control module, and a safety protection module; wherein the modular interface array includes at least three types of test terminals, each of which is connected to the circuit board under test via elastic contacts; the embedded control module includes a microprocessor, a programmable signal generator, and an AD conversion unit.

[0009] Furthermore, it also includes a power module.

[0010] Furthermore, the housing is made of a metal plate.

[0011] Furthermore, the programmable signal generator supports generating at least two of the following test waveforms:

[0012] Stepped wave, step amplitude 0.1V, duration 50ms ± 5%;

[0013] Triangular wave, frequency range adjustable from 1Hz to 10kHz;

[0014] The pulse group consists of five 2μs wide pulses spaced 20μs apart.

[0015] Furthermore, it also includes a wireless communication module that supports data interaction with the host computer via Bluetooth 5.0 or ZigBee 3.0 protocols, with a transmission rate of no less than 2Mbps.

[0016] Furthermore, the wireless communication module is characterized by integrating a data encryption unit, which uses the AES-256 algorithm to encrypt the test data in real time, with an encryption delay of ≤5ms.

[0017] Furthermore, the microprocessor and the programmable signal generator are bidirectionally connected.

[0018] Furthermore, the microprocessor and the modular interface array are bidirectionally connected.

[0019] Furthermore, the microprocessor is an S3C2451 embedded control processor.

[0020] Furthermore, the safety protection module includes a temperature compensation circuit.

[0021] The principle and benefit effect of this invention are as follows:

[0022] 1. The low-power integrated junction box provided by this utility model can not only expand the functions of the microprocessor by using a modular interface array, but also provide flexible interface expansion and support multiple communication protocols and modular design; this makes the junction box widely used for testing circuits of different types of electric toys.

[0023] 2. The low-power circuit integrated junction box provided by this utility model uses the S3C2451 embedded control processor to quickly realize the automatic measurement and judgment of low-power points. It can also save various measured parameters detected by a programmable signal generator and an AD conversion unit, and then transmit data through a wireless communication module, which facilitates the query and transmission of detection results, improves detection efficiency, and the detection results also have high measurement accuracy and good reproducibility.

[0024] 3. The low-power integrated junction box provided by this utility model uses a wireless communication module with an integrated data encryption unit, which can encrypt the data in transmission to ensure that the data is not eavesdropped or tampered with when transmitted in the wireless channel; this not only ensures communication security, but also effectively protects user privacy and prevents data leakage.

[0025] 4. The low-power integrated junction box provided by this utility model uses a safety protection module and a temperature compensation circuit to monitor the ambient temperature in real time and dynamically adjust the overcurrent threshold. This not only protects the junction box from damage caused by various electrical faults, but also improves the reliability and stability of the system. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the utility model.

[0027] Explanation of reference numerals in the attached drawings: 1. Housing; 2. Modular interface array; 3. Embedded control module; 4. Safety protection module; 5. Flexible contact; 6. Circuit board under test; 7. Microprocessor; 8. Programmable signal generator; 9. AD conversion unit; 10. Power supply module; 11. Wireless communication module. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should also be understood that the following embodiments are only for further illustration of the present invention and should not be construed as limiting the scope of protection of the present invention. Specific mass, reaction time, temperature, process parameters, etc., in the examples are merely examples within a suitable range. Any non-essential improvements and adjustments made by those skilled in the art based on the above description of the present invention are within the scope of protection of the present invention.

[0029] like Figure 1The diagram shows the structure of the integrated low-power circuit junction box provided by this utility model, including a housing, a modular interface array, an embedded control module, and a safety protection module. The modular interface array includes at least three types of test terminals, each connected to the circuit board under test via elastic contacts. The test terminals can be selected from general-purpose test terminals, SMA (Subminiature A) terminals, DB series terminals (such as DB9, DB25), RJ45 terminals, USB terminals, SPI terminals, and I2C terminals. The embedded control module includes a microprocessor, a programmable signal generator, and an AD conversion unit.

[0030] The integrated low-power circuit junction box also includes a power module.

[0031] The housing of the integrated low-power circuit junction box is made of metal plate.

[0032] The programmable signal generator in the integrated low-power circuit junction box supports the generation of at least two of the following test waveforms:

[0033] Stepped wave, step amplitude 0.1V, duration 50ms ± 5%;

[0034] Triangular wave, frequency range adjustable from 1Hz to 10kHz;

[0035] The pulse group consists of five 2μs wide pulses spaced 20μs apart.

[0036] The integrated low-power circuit junction box also includes a wireless communication module, which supports data interaction with the host computer via Bluetooth 5.0 or ZigBee 3.0 protocols, with a transmission rate of not less than 2Mbps.

[0037] The wireless communication module in the integrated low-power circuit junction box has a data encryption unit that uses the AES-256 algorithm to encrypt the test data in real time with an encryption delay of ≤5ms.

[0038] The microprocessor of the integrated low-power circuit junction box is bidirectionally connected to the programmable signal generator.

[0039] The microprocessor of the integrated low-power circuit junction box is bidirectionally connected to the modular interface array.

[0040] The microprocessor of the integrated low-power circuit junction box is an S3C2451 embedded control processor.

[0041] The safety protection module of the integrated low-power circuit junction box includes a temperature compensation circuit that monitors the ambient temperature in real time and dynamically adjusts the overcurrent threshold. The temperature compensation coefficient is -0.05A / ℃.

[0042] The specific operating steps for the integrated low-power circuit junction box are as follows:

[0043] Step S1: Establish an electrical connection with the circuit board of the toy under test through a modular interface array;

[0044] Step S2: The embedded control module generates multi-stage test signals according to the preset test plan, including:

[0045] The first stage applies 80% of the rated voltage for 30 seconds;

[0046] The second stage increases the voltage to 120% of the nominal voltage at a rate of 1V / s;

[0047] The third stage involves applying a burst shock test;

[0048] Step S3: Real-time acquisition of circuit response parameters. When abnormal parameters are detected, the safety protection module cuts off the test circuit within 10ms.

[0049] Step S4: Generate a test report that includes waveform distortion rate, steady-state error, and transient response time.

[0050] Step S5: Receive data and view and save the test report via a Bluetooth-enabled device (e.g., mobile phone and computer).

[0051] The above description is only a preferred embodiment of the present utility model, but the scope of protection of the present utility model is not limited thereto. Any modifications, equivalent substitutions and improvements made on the basis of the overall concept of the present utility model shall fall within the scope of protection of the present utility model.

Claims

1. A low-power integrated junction box, characterized in that, include: The enclosure (1), modular interface array (2), embedded control module (3), and safety protection module (4) are provided. The modular interface array includes at least three types of test terminals, and each test terminal is connected to the circuit board under test (6) through elastic contacts (5). The embedded control module includes a microprocessor (7), a programmable signal generator (8), and an AD conversion unit (9).

2. The integrated low-power circuit junction box according to claim 1, characterized in that, It also includes a power module (10).

3. The integrated low-power circuit junction box according to claim 1, characterized in that, The casing is made of metal plates.

4. The integrated low-power circuit junction box according to claim 1, characterized in that, The programmable signal generator supports generating at least two of the following test waveforms: Stepped wave, step amplitude 0.1V, duration 50ms ± 5%; Triangular wave, frequency range adjustable from 1Hz to 10kHz; The pulse group consists of five 2μs wide pulses spaced 20μs apart.

5. The integrated low-power circuit junction box according to claim 1, characterized in that, It also includes a wireless communication module (11) that supports data interaction with the host computer via Bluetooth 5.0 or ZigBee 3.0 protocol, with a transmission rate of not less than 2Mbps.

6. The integrated low-power circuit junction box according to claim 5, characterized in that, The wireless communication module integrates a data encryption unit, which uses the AES-256 algorithm to encrypt the test data in real time with an encryption delay of ≤5ms.

7. The integrated low-power circuit junction box according to claim 1, characterized in that, The microprocessor and the programmable signal generator are bidirectionally connected.

8. The integrated low-power circuit junction box according to claim 1, characterized in that, The microprocessor and the modular interface array are bidirectionally connected.

9. The integrated low-power circuit junction box according to claim 1, characterized in that, The microprocessor is an S3C2451 embedded control processor.

10. The integrated low-power circuit junction box according to claim 1, characterized in that, The safety protection module includes a temperature compensation circuit.

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