A multifunction programmable automated test platform
The multi-functional programmable automated testing platform solves the problem of parameter setting relying on manual operation in refrigerator testing, and improves the automation level and data accuracy of refrigerator testing, adapting to different testing environments and needs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- XINAN JIANGSU ELECTRIC APPLIANCE CO LTD
- Filing Date
- 2026-04-07
- Publication Date
- 2026-06-12
AI Technical Summary
In current refrigerator testing processes, parameter settings mainly rely on manual operation. Especially in fully automated testing, it is difficult to effectively control parameters such as resistance, load, and temperature, resulting in low automation and poor accuracy and traceability of test data.
Design a multi-functional programmable automated testing platform, including a serial communication unit, a host computer control unit, an electronic load unit, a 6-channel adjustable resistor unit, a relay control unit, and a temperature sensing unit. It realizes multi-parameter synchronous adjustment and data acquisition through serial communication, supports wireless and wired dual-mode connection, and is equipped with a touch button panel and an OLED display to realize local and remote parameter control.
This significantly improves the automation level of refrigerator testing, enhances the real-time performance and accuracy of parameter adjustment and data acquisition, adapts to different testing needs, reduces equipment failure rate, and improves the stability and reliability of testing.
Smart Images
Figure CN122193773A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of refrigerator testing technology, specifically a multifunctional programmable automated testing platform. Background Technology
[0002] Refrigerators are now ubiquitous in households, becoming one of the most common home appliances. In a typical refrigerator, the refrigerant, powered by a compressor, cycles through a process of vaporization (absorbing heat in the evaporator) and liquefaction (releasing heat in the condenser) to achieve a cooling effect. Intelligent temperature control in refrigerators requires temperature sensors. Currently, temperature sensor products have evolved from analog integrated temperature sensors to intelligent data temperature sensors. With technological advancements, it is believed that the intelligence of refrigerators will continue to improve.
[0003] In the testing of refrigerator products, many parameter settings are usually done manually, especially in fully automated testing where it is impossible to controllably change resistance, load, temperature, etc. Therefore, we propose a multi-functional programmable automated testing platform. Summary of the Invention
[0004] The purpose of this invention is to provide a multifunctional programmable automated testing platform to solve the problems in the prior art.
[0005] To achieve the above objectives, the present invention provides the following technical solution: a multifunctional programmable automated testing platform, comprising a serial communication unit, a host computer control unit, an electronic load unit, a 6-channel adjustable resistor unit, a relay control unit, and a temperature sensing unit. The host computer control unit receives control commands from a computer through the serial communication unit, and the electronic load unit, the 6-channel adjustable resistor unit, the relay control unit, and the temperature sensing unit are all connected to the serial communication unit.
[0006] Preferably, the serial communication unit includes a wireless serial port circuit, an RS485 conversion circuit, and a USB to RS485 module; the TX and RX signals generated by the wireless serial port circuit are converted by the RS485 conversion circuit and then output; the USB to RS485 module is connected to the RS485 external interface to realize a wired connection between the test platform and the computer; the wireless serial port circuit is equipped with a 2.4G wireless communication module.
[0007] Preferably, it also includes a voltage conversion unit, which includes a voltage conversion module U1 and a voltage conversion module U2. The voltage conversion module U1 and the voltage conversion module U2 are used to convert the 12V input voltage into 5V and 3.3V operating voltages to power each unit circuit.
[0008] Preferably, the 6-channel adjustable resistor unit is equipped with a touch button panel and an OLED display screen. The touch button panel includes 4 touch buttons driven by a BS814A-1 chip, which supports local manual setting of adjustable resistor parameters. The 6-channel adjustable resistor unit receives remote control commands from the host computer control unit to realize remote parameter adjustment. The resistor network of the 6-channel adjustable resistor unit consists of 8 control chips, 60 relays and 54 resistors.
[0009] Preferably, the relay control unit includes an MCU control circuit and a relay execution circuit. The MCU control circuit uses an STC8G1K08-36I-SOP8 chip as its core and is equipped with a MAX13487EESA+T type RS485 chip to realize signal transmission. The relay execution circuit is equipped with a LY2N-JAC220 / 240 type relay and a 2N7002K-T1-GE3 type switching transistor to realize multiple working modes control and cyclic on / off actions of the relay.
[0010] Preferably, the temperature sensing unit includes three DS18B20 temperature sensors, an MCU acquisition circuit, and an RS485-serial port conversion module. The MCU acquisition circuit is based on an STC8H8K64U-45I-LQFP32 chip and controls the MCU acquisition circuit to synchronously acquire temperature data from the three DS18B20 temperature sensors via RS485. The acquired data is transmitted to the host computer control unit via a dual serial port communication unit.
[0011] Preferably, it also includes a cyclic on / off interface, a 6-channel adjustable resistor interface and a 3-channel temperature sensor interface. The dual serial communication unit is equipped with an RX receive indicator, a TX transmit indicator and a download port, and the download port is an NC type interface.
[0012] The testing method for a multi-functional programmable automated testing platform includes the following steps: S1. Depending on the situation, select the connection method between the test platform and the computer, and establish an RS485 communication link between the test platform and the computer via wireless 2.4G or USB wired connection. S2. Control commands are sent via computer, and the commands are converted by the dual serial communication unit and then transmitted to the host computer control unit. S3. The host computer control unit synchronously adjusts the load parameters of the adjustable electronic load unit and the resistance parameters of the 6-channel adjustable resistor unit according to the instructions, controls the working mode of the relay control unit, and triggers the 3-channel temperature sensing unit to collect temperature data. The S4 and 6-channel adjustable resistor units' OLED displays show local parameters in real time, while the data collected by the 3-channel temperature sensing units is transmitted back to the host computer via a communication link, enabling real-time monitoring and control of test parameters.
[0013] Compared with the prior art, the beneficial effects of the present invention are: 1. Equipped with dual serial port communication methods of 2.4G wireless and USB wired, the connection method can be flexibly selected according to the test environment (such as long-distance test or environment without wireless signal). The serial communication unit has a maximum baud rate of 1.5Mbps, supports continuous data transmission, and ensures the stability and timeliness of command and data transmission, thus solving the limitations of the traditional single connection method of test.
[0014] 2. The host computer control unit performs unified command scheduling and multi-parameter synchronous adjustment of the four major units, namely electronic load, 6-channel adjustable resistor, relay and 3-channel temperature sensor. This replaces the manual parameter setting operation of traditional refrigerator testing, completely solves the core problems of uncontrollable changes in resistance, load and temperature in fully automatic testing, and greatly improves the degree of automation of testing.
[0015] 3. The 6-channel adjustable resistor unit is equipped with a touch button panel and an OLED display screen, supporting dual modes of local manual parameter setting and host computer remote parameter control. Local parameters can be quickly corrected, and remote unmanned operation can be achieved. The parameter data of the two modes are synchronized in real time, which takes into account the convenience of on-site operation and the intelligence of remote testing, and adapts to different testing operation needs.
[0016] 4. It can simultaneously adjust and collect data on multiple parameters such as load, resistance, and temperature. The temperature sensing unit can achieve simultaneous acquisition of three temperature channels. All test parameters are displayed locally on the OLED screen and remotely monitored in real time by the host computer. This avoids the problems of large parameter errors and untimely data recording in traditional manual testing, and improves the accuracy and traceability of test data.
[0017] 5. Each functional unit adopts a modular design and is equipped with dedicated hardware interfaces such as a cyclic on / off interface, a 6-channel adjustable resistor interface, and a 3-channel temperature sensor interface, realizing modular plug-and-play connection, which facilitates later maintenance, upgrades and troubleshooting; at the same time, the relay control unit supports multiple working modes and cyclic on / off actions, and the electronic load unit connects to external modules through a dedicated interface, which can adapt to the testing needs of different types of refrigerator products and different working conditions, and has a wide range of applications.
[0018] 6. The core control chip, sensors, and relays are all selected from dedicated industrial-grade components. The voltage conversion unit is equipped with multi-stage filtering circuits to provide stable 5V / 3.3V power supply for each module. The signal pins of the serial communication unit are equipped with pull-up resistors to ensure signal stability. The human-computer interaction components such as the OLED display and touch button panel are designed to fit actual operation, ensuring stable operation of the platform in long-term, continuous, fully automatic testing of refrigerator products and reducing equipment failure rate. Attached Figure Description
[0019] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a flowchart of the present invention; Figure 2 This is a circuit diagram of the wireless serial communication unit of the present invention; Figure 3 This is a circuit diagram of the voltage conversion of this invention; Figure 4 This is the circuit diagram of the keypad of the present invention; Figure 5 This is a circuit diagram of the OLED display screen of the present invention; Figure 6 This is the circuit diagram of the adjustable resistor of the present invention; Figure 7 This is a circuit diagram of the electronic load interface of the present invention; Figure 8 This is the circuit diagram of the MCU control of this invention; Figure 9 This is the circuit diagram of the relay of the present invention; Figure 10 This is the circuit diagram of the 3-channel temperature sensor of the present invention; Figure 11 This is a circuit diagram of the DS18B20 temperature sensor access circuit of the present invention; Figure 12 This is a circuit diagram of the RS485-serial port conversion module of the present invention. Detailed Implementation
[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.
[0021] Please see Figure 1-12In this embodiment of the invention, a multifunctional programmable automated testing platform includes a serial communication unit, a host computer control unit, an electronic load unit, a 6-channel adjustable resistor unit, a relay control unit, and a temperature sensing unit. The host computer control unit receives control commands from a computer via the serial communication unit. The electronic load unit, the 6-channel adjustable resistor unit, the relay control unit, and the temperature sensing unit are all connected to the serial communication unit. The host computer control unit performs unified command scheduling and multi-parameter synchronous adjustment of the four main units (electronic load, 6-channel adjustable resistor, relay, and 3-channel temperature sensing), replacing the manual parameter setting operations of traditional refrigerator testing. This completely solves the core problems of uncontrollable changes in resistance, load, and temperature in fully automated testing, significantly improving the automation level of the test.
[0022] Preferably, the serial communication unit includes a wireless serial port circuit, an RS485 conversion circuit, and a USB-to-RS485 module. The TX and RX signals generated by the wireless serial port circuit are converted by the RS485 conversion circuit and then output. The USB-to-RS485 module is connected to the RS485 external interface to realize a wired connection between the test platform and the computer. The wireless serial port circuit is equipped with a 2.4G wireless communication module. Equipped with both 2.4G wireless and USB wired dual serial port communication, the connection method can be flexibly selected according to the test environment (such as long-distance testing or environments without wireless signals). Furthermore, the serial communication unit has a maximum baud rate of 1.5Mbps, supports continuous data transmission, and ensures the stability and timeliness of command and data transmission, overcoming the limitations of traditional single-connection testing methods.
[0023] It also includes a voltage conversion unit, which includes a voltage conversion module U1 and a voltage conversion module U2. The voltage conversion modules U1 and U2 are used to convert the 12V input voltage into 5V and 3.3V operating voltages to power each unit circuit.
[0024] The 6-channel adjustable resistor unit is equipped with a touch panel and an OLED display. The touch panel includes four touch buttons driven by a BS814A-1 chip, supporting local manual setting of adjustable resistor parameters. The 6-channel adjustable resistor unit receives remote control commands from a host computer control unit to achieve remote parameter adjustment. The resistor network of the 6-channel adjustable resistor unit consists of 8 control chips, 60 relays, and 54 resistors. The 6-channel adjustable resistor unit, equipped with a touch panel and an OLED display, supports dual modes: local manual parameter setting and remote parameter adjustment via a host computer. Local parameter correction is quick, while remote operation enables unmanned operation. Parameter data is synchronized in real time between the two modes, balancing the convenience of on-site operation with the intelligence of remote testing, adapting to different testing needs.
[0025] The relay control unit includes an MCU control circuit and a relay execution circuit. The MCU control circuit uses the STC8G1K08-36I-SOP8 chip as its core and is equipped with a MAX13487EESA+T RS485 chip to realize signal transmission. The relay execution circuit is equipped with a LY2N-JAC220 / 240 relay and a 2N7002K-T1-GE3 switching transistor to realize multiple working modes control and cyclic on / off actions of the relay.
[0026] The temperature sensing unit includes three DS18B20 temperature sensors, an MCU acquisition circuit, and an RS485-serial port conversion module. The MCU acquisition circuit is based on the STC8H8K64U-45I-LQFP32 chip and controls the MCU acquisition circuit to synchronously acquire temperature data from the three DS18B20 temperature sensors via RS485. The acquired data is transmitted to the host computer control unit via a dual serial port communication unit.
[0027] It also includes a cyclic on / off interface, a 6-channel adjustable resistor interface, and a 3-channel temperature sensor interface. The dual serial communication unit is equipped with an RX receive indicator, a TX transmit indicator, and a download port, which is an NC type interface. Each functional unit adopts a modular design, equipped with dedicated hardware interfaces such as the cyclic on / off interface, the 6-channel adjustable resistor interface, and the 3-channel temperature sensor interface, realizing modular plug-and-play connections, facilitating later maintenance, upgrades, and troubleshooting. At the same time, the relay control unit supports multiple working modes and cyclic on / off actions, and the electronic load unit connects to external modules through a dedicated interface, which can adapt to the testing needs of different types of refrigerator products and different operating conditions, and has a wide range of applications.
[0028] The testing method for a multi-functional programmable automated testing platform includes the following steps: S1. Depending on the situation, select the connection method between the test platform and the computer, and establish an RS485 communication link between the test platform and the computer via wireless 2.4G or USB wired connection. S2. Control commands are sent via computer, and the commands are converted by the dual serial communication unit and then transmitted to the host computer control unit. S3. The host computer control unit synchronously adjusts the load parameters of the adjustable electronic load unit and the resistance parameters of the 6-channel adjustable resistor unit according to the instructions, controls the working mode of the relay control unit, and triggers the 3-channel temperature sensing unit to collect temperature data. The S4 and 6-channel adjustable resistor units' OLED displays show local parameters in real time, while the data collected by the 3-channel temperature sensing units is transmitted back to the host computer via a communication link, enabling real-time monitoring and control of test parameters.
[0029] The working principle of this invention is: Choose either 2.4G wireless or USB wired mode according to the test scenario. Establish a bidirectional RS485 communication link between the computer and the test platform through the RS485 conversion circuit / USB to RS485 module of the serial communication unit to provide a channel for command transmission and data feedback. Commands for adjusting test parameters, controlling modes, and acquiring data issued by the host computer are converted into signals by the serial communication unit and then transmitted to the host computer control unit for unified scheduling. The host computer control unit synchronously sends control signals to each execution unit according to the instructions, adjusts the load parameters of the electronic load unit and the resistance parameters of the 6-channel adjustable resistor unit, controls the working mode and cyclic on / off action of the relay control unit, and triggers the temperature sensing unit to synchronously collect temperature data from the 3-channel DS18B20 sensors. The OLED display of the 6-channel adjustable resistor unit displays the resistance parameters locally in real time. The temperature data collected by the temperature sensing unit and the operating status data of each unit are transmitted back to the host computer via the serial communication unit, realizing remote real-time monitoring of test parameters. The adjustable resistors can also be manually corrected locally via the touch button panel, and the corrected data is synchronously uploaded to the host computer to keep the data consistent.
[0030] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention 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 invention should be included within the protection scope of the present invention.
Claims
1. A multifunctional programmable automated testing platform, characterized in that, It includes a serial communication unit, a host computer control unit, an electronic load unit, a 6-channel adjustable resistor unit, a relay control unit, and a temperature sensing unit. The host computer control unit receives control commands from the computer through the serial communication unit. The electronic load unit, the 6-channel adjustable resistor unit, the relay control unit, and the temperature sensing unit are all connected to the serial communication unit.
2. The multifunctional programmable automated testing platform according to claim 1, characterized in that, The serial communication unit includes a wireless serial port circuit, an RS485 conversion circuit, and a USB to RS485 module. The TX and RX signals generated by the wireless serial port circuit are converted by the RS485 conversion circuit and then output. The USB to RS485 module is connected to the RS485 external interface to realize the wired connection between the test platform and the computer. The wireless serial port circuit is equipped with a 2.4G wireless communication module.
3. The multifunctional programmable automated testing platform according to claim 1, characterized in that, It also includes a voltage conversion unit, which includes a voltage conversion module U1 and a voltage conversion module U2. The voltage conversion modules U1 and U2 are used to convert the 12V input voltage into 5V and 3.3V operating voltages to power each unit circuit.
4. The multifunctional programmable automated testing platform according to claim 1, characterized in that, The 6-channel adjustable resistor unit is equipped with a touch button panel and an OLED display. The touch button panel includes 4 touch buttons driven by a BS814A-1 chip, which supports local manual setting of adjustable resistor parameters. The 6-channel adjustable resistor unit receives remote control commands from the host computer control unit to realize remote parameter adjustment. The resistor network of the 6-channel adjustable resistor unit consists of 8 control chips, 60 relays and 54 resistors.
5. The multifunctional programmable automated testing platform according to claim 1, characterized in that, The relay control unit includes an MCU control circuit and a relay execution circuit. The MCU control circuit uses the STC8G1K08-36I-SOP8 chip as its core and is equipped with a MAX13487EESA+T RS485 chip to realize signal transmission. The relay execution circuit is equipped with a LY2N-JAC220 / 240 relay and a 2N7002K-T1-GE3 switching transistor to realize multiple working modes control and cyclic on / off actions of the relay.
6. The multifunctional programmable automated testing platform according to claim 1, characterized in that, The temperature sensing unit includes three DS18B20 temperature sensors, an MCU acquisition circuit, and an RS485-serial port conversion module. The MCU acquisition circuit is based on the STC8H8K64U-45I-LQFP32 chip and controls the MCU acquisition circuit to synchronously acquire temperature data from the three DS18B20 temperature sensors via RS485. The acquired data is transmitted to the host computer control unit via a dual serial port communication unit.
7. A multifunctional programmable automated testing platform according to any one of claims 1-6, characterized in that, It also includes a cyclic on / off interface, a 6-channel adjustable resistor interface and a 3-channel temperature sensor interface. The dual serial communication unit is equipped with an RX receive indicator, a TX transmit indicator and a download port, which is an NC type interface.
8. A testing method for a multifunctional programmable automated testing platform as described in any one of claims 1-7, characterized in that, Includes the following steps: S1. Depending on the situation, select the connection method between the test platform and the computer, and establish an RS485 communication link between the test platform and the computer via wireless 2.4G or USB wired connection. S2. Control commands are sent via computer, and the commands are converted by the dual serial port communication unit and then transmitted to the host computer control unit. S3. The host computer control unit synchronously adjusts the load parameters of the adjustable electronic load unit and the resistance parameters of the 6-channel adjustable resistor unit according to the instructions, controls the working mode of the relay control unit, and triggers the 3-channel temperature sensing unit to collect temperature data. The S4 and 6-channel adjustable resistor units' OLED displays show local parameters in real time, while the data collected by the 3-channel temperature sensing units is transmitted back to the host computer via a communication link, enabling real-time monitoring and control of test parameters.