Portable touch type power supply inspection equipment

Abstract

The invention, which relates to the technical field of customized power supply digital detection, discloses a portable touch-type power supply inspection device comprising an MCU control module, a touch display module, a load isolation module, a communication interaction module, a detection module and a power supply module. The output end of the detection module is electrically connected with the input end of the MCU control module, the communication interaction module interacts with the MCU control module, and the MCU control module interacts with the load isolation module. Enabling control with the to-be-tested equipment is realized through an isolation IO circuit of the load isolation module, so that electrical isolation between a control signal and the to-be-tested equipment is ensured, power supply parameters are rapidly detected through the detection module, equipment damage and potential safety hazards can be effectively avoided, the overall safety of the system is improved, and through differential analog output, the reliability of the system is improved. An accurate and reliable measurement result is provided, and the stability and the reliability of an inspection result are ensured.

Description

Technical Field

[0001] The invention relates to the field of customized power supply digital detection, and in particular to a portable touch-type power supply testing device. Background Art

[0002] With the rapid development of the national defense science and technology industry, the performance of equipment is also steadily improving. Customized reinforced power supply is of great significance for ensuring combat effectiveness, ensuring the normal operation of communication systems and electronic equipment, and providing reliable energy security. It plays an important role in the development of modern equipment. Customized reinforced power supply is a special power supply equipment designed according to specific needs and application scenarios. It has the characteristics of multiple models, complex interfaces, and small batch production of single models. Its inspection work involves product functions, performance, safety and other aspects. How to improve its inspection and acceptance efficiency is also an important task. In order to improve the inspection efficiency of reinforced power supply, a portable touch power supply detection device is invented. Summary of the invention

[0003] In order to solve the above technical problems, a portable touch-type power supply inspection device is provided. This technical solution solves the problems proposed in the above background technology, namely, there are many customized reinforced power supply models, complex interfaces, small batch production quantity of a single model, low power supply detection efficiency, and lack of certain accuracy and reliability of detection results.

[0004] In order to achieve the above purpose, the technical solution adopted by the present invention is: A portable touch-type power supply inspection device comprises an MCU control module, a touch display module, a load isolation module, a communication interaction module, a detection module and a power supply module, wherein the MCU control module interacts with the touch display module, the output end of the detection module is electrically connected to the input end of the MCU control module, the communication interaction module interacts with the MCU control module, and the MCU control module interacts with the load isolation module; The output end of the load isolation module is electrically connected to the input end of the touch display module, and the power supply is used to power the device.

[0005] Preferably, the touch display module is integrated with a touch display screen, which is used to realize user interaction. A graphical digital command window is constructed based on the touch display screen, and the MCU control module is cooperated to receive user commands and display the device status. The touch display screen parameters are 5.0 inches, 800x480 resolution, 350 lumens, support TTL / CMOS, RS232 level, support multiple fonts, picture display, and the power supply can be selected from 4.5 to 35V. The touch display module realizes control, setting, display and touch functions through instructions.

[0006] Preferably, the load isolation module is integrated with an isolation IO circuit, and the isolation IO circuit is used to implement enable control with the device under test to ensure electrical isolation between the control signal and the device under test.

[0007] Preferably, the communication interaction module includes: A UART serial port communication unit, wherein the UART serial port communication unit includes a first UART serial port and a second UART serial port, wherein the first UART serial port is selected as an RS422 interface and is compatible with a USART serial port output, wherein the RS422 mode or the USART mode is configured by setting a 0 ohm welding method, and data isolation conversion between the USART and RS422 serial ports is realized based on an RS422 serial port chip; An IIC communication unit, the IIC communication unit is used for multiple devices to communicate, and the IIC communication unit is integrated with an IIC buffer circuit to enhance the driving load capacity of the host IIC; A CAN communication unit includes a CAN communication circuit, wherein the CAN communication circuit implements CAN communication based on a device CAN peripheral resource and a CAN transceiver, and the CAN communication circuit is designed with a common-mode inductor for suppressing common-mode noise of the bus.

[0008] Preferably, the detection module comprises: A voltage detection unit, wherein the voltage detection unit is integrated with a voltage detection circuit, wherein the voltage detection circuit includes a high-reliability isolated voltage sampling amplifier and a digital isolator, wherein the high-reliability isolated voltage sampling amplifier has a single-ended input signal range of 0.1V to 2V and a fixed gain of 1; A current detection unit, wherein the current detection unit adopts an isolated current sensor to convert a current signal into a voltage signal, and then performs AD conversion. The current detection unit integrates a U10 chip, wherein the 5th and 7th pins of the U10 chip are connected in series with a capacitor C48 and are grounded, the 7th pin of the U10 chip is electrically connected to a resistor R38 and a capacitor C49 and is grounded, the 8th pin of the U10 chip is connected in series with a capacitor C47 and is grounded, and the 8th pin of the U10 chip is pulled up to 3.3V; The temperature detection unit is integrated with a U4 chip, wherein the first pin of the U4 chip is grounded, the second pin of the U4 chip is electrically connected to a resistor R19, and the second and third pins of the U4 chip are connected in series with a resistor R22 and pulled down to 3.3V.

[0009] Preferably, the power module is integrated with a TYPEC power supply socket and a board-mounted plastic shell socket, which is used to receive an external input voltage of 4.5~5.5V and convert it into 5V voltage. The power module is used to convert 5V into DC3.3V for use by other modules.

[0010] Compared with the prior art, the present invention has the following beneficial effects: The present invention proposes a portable touch-type power supply testing device, which realizes enable control with a device to be tested through an isolated IO circuit of a load isolation module to ensure electrical isolation between a control signal and the device to be tested, and quickly detects power supply parameters through a detection module, which can effectively avoid equipment damage and potential safety hazards, and improve the overall safety of the system. Through differential analog output, low offset and gain drift, the detection accuracy in the entire temperature range is ensured, and high common-mode transient immunity ensures that accurate and reliable measurement results are provided even in the presence of high-power switches, thereby ensuring the stability and reliability of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a structural block diagram of a portable touch-type power supply testing device proposed by the present invention; Figure 2 It is a circuit diagram of a UART serial communication unit in the present invention; Figure 3 This is a circuit diagram of the IIC communication unit in the present invention; Figure 4 This is a circuit diagram of a CAN communication unit in the present invention; Figure 5 This is a circuit diagram of a voltage detection unit in the present invention; Figure 6 This is a circuit diagram of a current detection unit in the present invention; Figure 7 This is a circuit diagram of a temperature detection unit in the present invention; Figure 8 This is a circuit diagram of the power module in the present invention. DETAILED DESCRIPTION

[0012] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0013] Reference Figure 1 As shown, a portable touch-type power supply inspection device in an embodiment of the present invention includes an MCU control module, a touch display module, a load isolation module, a communication interaction module, a detection module and a power supply module, wherein the MCU control module interacts with the touch display module, the output end of the detection module is electrically connected to the input end of the MCU control module, the communication interaction module interacts with the MCU control module, and the MCU control module interacts with the load isolation module; The output end of the load isolation module is electrically connected to the input end of the touch display module, and the power supply is used to power the device.

[0014] In this embodiment, according to the design requirements, GigaDevice's single-chip microcomputer GD32F103C8T6 is selected as the main control chip. The chip has a main frequency of 108M, integrates rich and easy-to-use peripherals, has 37 IO ports, 3 serial ports, 1 CAN port, 2 IIC ports, 2 SPI interfaces and 10 12-bit ADC channels, which fully meet the control and peripheral requirements of the invention.

[0015] The touch display module is integrated with a touch display screen, which is used to realize user interaction. A graphical digital command window is constructed based on the touch display screen, and the MCU control module is cooperated to receive user commands and display the device status. The touch display screen parameters are 5.0 inches, 800x480 resolution, 350 lumens, support TTL / CMOS, RS232 level, support multiple fonts, picture display, and the power supply can be selected from 4.5 to 35V. The touch display module realizes control, setting, display and touch functions through instructions.

[0016] The load isolation module is integrated with an isolated IO circuit, which is used to realize the enable control with the device under test to ensure the electrical isolation between the control signal and the device under test; It is understandable that the purpose of the isolated IO circuit design is to achieve enable control with the device under test to ensure electrical isolation between the control signal and the device under test, thereby improving the system safety, stability and anti-interference ability. This design uses Suzhou Naxin Microelectronics' 4-channel digital isolator NsiP8940W1-DSWR. By modifying the VSEL pin matching resistor, the output voltage can be configured to 3.3V mode or 5V mode. When the VSEL matching resistor R28 is welded, the output isolation voltage is 5V, and when the matching resistor is changed to R29, the output isolation voltage is 3.3V.

[0017] The communication interaction module includes: Reference Figure 2 As shown, a UART serial port communication unit includes a first UART serial port and a second UART serial port, the first UART serial port is selected as the RS422 interface, and is compatible with the USART serial port output, and the RS422 mode or USART mode is configured by setting a 0 ohm welding method, and based on the RS422 serial port chip, the data isolation conversion of the USART and RS422 serial ports is realized; In this embodiment, NsiP83086(V)-DSWTR of Nanochip Microelectronics is selected as the RS422 serial port chip to realize data isolation and conversion between USART and RS422 serial ports; Reference Figure 3As shown, an IIC communication unit, the IIC communication unit is used for multiple devices to communicate, and the IIC communication unit is integrated with an IIC buffer circuit to enhance the driving load capacity of the host IIC; The IIC application design of the inspection device is a host interface, which can communicate with multiple slaves at the same time when mounted on the IIC bus. In order to ensure the driving capability, an IIC buffer circuit is designed, and NCA9617A from Nanochip Microelectronics is selected as the bidirectional buffer of the IIC bus to enhance the driving load capacity of the host IIC.

[0018] Reference Figure 4 As shown, a CAN communication unit includes a CAN communication circuit, and the CAN communication circuit implements CAN communication based on the device CAN peripheral resources and the CAN transceiver. The CAN communication circuit is designed with a common-mode inductor to suppress the common-mode noise of the bus.

[0019] In this solution, the CAN transceiver uses Beijing Chuancheng's CP3053T, which is an isolated control area physical layer transceiver with an internally integrated isolated DC-DC converter to create a completely isolated interface between the CAN protocol controller and the physical layer bus, which can isolate noise and interference and prevent damage to sensitive circuits. Only a 5V power supply is required on the logic side to implement a fully isolated CAN transceiver solution. A common-mode inductor is designed on the CAN bus side to suppress the common-mode noise of the bus. At the same time, the CAN bus ESD protection diode ESD2CAN24T2Q is used to protect the CAN bus from electrostatic discharge and other transient voltages, thereby improving the system's anti-interference ability and stability.

[0020] The detection module includes: Reference Figure 5 As shown, the voltage detection unit integrates a voltage detection circuit, and the voltage detection circuit includes a high-reliability isolated voltage sampling amplifier and a digital isolator. The voltage sampling amplifier uses the NSi1311-DSWR of Suzhou Nanochip Microelectronics. The chip is a high-performance isolation amplifier with a single-ended input signal range of 0.1V to 2V, a fixed gain of 1, and provides differential analog output. Low offset and gain drift ensure accuracy over the entire temperature range, and high common-mode transient immunity ensures that the chip can provide accurate and reliable measurement results even in the presence of high-power switches. The isolated power supply uses the NSiP8942W1-DSWR of Nanochip Microelectronics, which supports 4500Vrms insulation voltage, provides high electromagnetic immunity and low radiation, and provides 5V to 5V, 5V to 3.3V, and 3.3V to 3.3V conversion modes; A current detection unit, wherein the current detection unit adopts an isolated current sensor to convert a current signal into a voltage signal, and then performs AD conversion. The current detection unit integrates a U10 chip, wherein the 5th and 7th pins of the U10 chip are connected in series with a capacitor C48 and are grounded, the 7th pin of the U10 chip is electrically connected to a resistor R38 and a capacitor C49 and is grounded, the 8th pin of the U10 chip is connected in series with a capacitor C47 and is grounded, and the 8th pin of the U10 chip is pulled up to 3.3V; Reference Figure 6 As shown, in this solution, the CC6903SO-20A chip in SOP8 package of Chengdu Xinjin Electronics is selected. The chip has the characteristics of small size and the error is ≤3% in the whole temperature range, which meets the use requirements.

[0021] The temperature detection unit is integrated with a U4 chip, wherein the first pin of the U4 chip is grounded, the second pin of the U4 chip is electrically connected to a resistor R19, and the second and third pins of the U4 chip are connected in series with a resistor R22 and pulled down to 3.3V.

[0022] Reference Figure 7 As shown in the figure, the temperature detection device uses GX18B20 from Zhongke Galaxy Core, and uses a single bus protocol to communicate with the host computer. It can work in parasitic mode and directly power the chip through the signal line, so there is no need for an additional power supply. The temperature measurement range of the sensor is -55℃~+125℃, and the test accuracy can reach ±4℃ within the range of -10℃~+70℃.

[0023] The power module integrates a TYPEC power supply socket and a board-mounted plastic shell socket, which is used to receive an external input voltage of 4.5~5.5V and convert it into a 5V voltage. The power module is used to convert 5V into DC3.3V for use by other modules.

[0024] Reference Figure 8 As shown, in this solution, the power module can be flexibly powered by a variety of methods such as mobile phone chargers, power banks or DC regulated power supplies. The external power supply is filtered to power the display screen. At the same time, Nanochip Microelectronics NSR31033-QSTBR is used to convert 5V to DC3.3V to power the board control circuit.

[0025] In summary, the advantages of the present invention are: the enable control of the device under test is realized through the isolated IO circuit of the load isolation module to ensure the electrical isolation between the control signal and the device under test, and the power supply parameters are quickly detected by the detection module, which can effectively avoid equipment damage and safety hazards and improve the overall safety of the system. The differential analog output, low offset and gain drift ensure the detection accuracy in the entire temperature range, and the high common-mode transient immunity ensures that accurate and reliable measurement results are provided even in the presence of high-power switches, thereby ensuring the stability and reliability of the test results.

[0026] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A portable touch-type power supply testing device, characterized in that: It includes an MCU control module, a touch display module, a load isolation module, a communication interaction module, a detection module and a power supply module. The MCU control module interacts with the touch display module, the output end of the detection module is electrically connected to the input end of the MCU control module, the communication interaction module interacts with the MCU control module, and the MCU control module interacts with the load isolation module; The output end of the load isolation module is electrically connected to the input end of the touch display module, and the power supply is used to power the device.

2. A portable touch-type power supply testing device according to claim 1, characterized in that: The touch display module is integrated with a touch display screen, which is used to realize user interaction. A graphical digital command window is constructed based on the touch display screen, and the MCU control module is cooperated to receive user commands and display the device status. The touch display screen parameters are 5.0 inches, 800x480 resolution, 350 lumens, support TTL / CMOS, RS232 level, support multiple fonts, picture display, and the power supply can be selected from 4.5 to 35V. The touch display module realizes control, setting, display and touch functions through instructions.

3. A portable touch-type power supply testing device according to claim 1, characterized in that: The load isolation module is integrated with an isolation IO circuit, and the isolation IO circuit is used to implement enable control with the device under test to ensure electrical isolation between the control signal and the device under test.

4. A portable touch-type power supply testing device according to claim 1, characterized in that: The communication interaction module includes: A UART serial port communication unit, wherein the UART serial port communication unit includes a first UART serial port and a second UART serial port, wherein the first UART serial port is selected as an RS422 interface and is compatible with a USART serial port output, wherein the RS422 mode or the USART mode is configured by setting a 0 ohm welding method, and data isolation conversion between the USART and RS422 serial ports is realized based on an RS422 serial port chip; An IIC communication unit, the IIC communication unit is used for multiple devices to communicate, and the IIC communication unit is integrated with an IIC buffer circuit to enhance the driving load capacity of the host IIC; A CAN communication unit includes a CAN communication circuit, wherein the CAN communication circuit implements CAN communication based on a device CAN peripheral resource and a CAN transceiver, and the CAN communication circuit is designed with a common-mode inductor for suppressing common-mode noise of the bus.

5. A portable touch-type power supply testing device according to claim 1, characterized in that: The detection module comprises: A voltage detection unit, wherein the voltage detection unit is integrated with a voltage detection circuit, wherein the voltage detection circuit includes a high-reliability isolated voltage sampling amplifier and a digital isolator, wherein the high-reliability isolated voltage sampling amplifier has a single-ended input signal range of 0.1V to 2V and a fixed gain of 1; A current detection unit, wherein the current detection unit adopts an isolated current sensor to convert a current signal into a voltage signal, and then performs AD conversion. The current detection unit integrates a U10 chip, wherein the 5th and 7th pins of the U10 chip are connected in series with a capacitor C48 and are grounded, the 7th pin of the U10 chip is electrically connected to a resistor R38 and a capacitor C49 and is grounded, the 8th pin of the U10 chip is connected in series with a capacitor C47 and is grounded, and the 8th pin of the U10 chip is pulled up to 3.3V; The temperature detection unit is integrated with a U4 chip, wherein the first pin of the U4 chip is grounded, the second pin of the U4 chip is electrically connected to a resistor R19, and the second and third pins of the U4 chip are connected in series with a resistor R22 and pulled down to 3.3V.

6. A portable touch-type power supply testing device according to claim 1, characterized in that: The power module integrates a TYPEC power supply socket and a board-mounted plastic shell socket, which is used to connect an external input voltage of 4.5~5.5V and convert it into 5V voltage. The power module is used to convert 5V into DC3.3V for use by other modules.

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