An automated measurement and control system and method for controller environmental stress screening test

Abstract

The present invention provides an automated measurement and control system for an environmental stress screening test of a controller and a related measurement and control method. The system is based on a CAN communication protocol and includes an aging control module that integrates an embedded single-chip microcomputer, A / D and D / A conversion circuits, a signal switching module, an aging power module, a signal switching module, a power pull-bias module, a power supply module, and a host computer. The system realizes automatic control and data storage of multiple controllers in a debugging stress screening test, a routine test, and a product life extension aging test, greatly improving the reliability, stability, and detection accuracy of the system for environmental stress screening tests, ensuring data accuracy and traceability. The system can be expanded through a CAN communication interface to preferably meet the requirements of automatically monitoring and controlling 120 controllers at the same time, greatly improving the detection efficiency of the environmental stress screening test.

Description

Technical Field

[0001] The present invention relates to the technical field of controller environmental stress screening test measurement and control, and in particular to an automatic measurement and control system for controller environmental stress screening test and related control and measurement and control methods. Background Art

[0002] At present, environmental stress screening tests require manual control of the signal source size and the duration of power on and off. In addition, input channel selection, input signal polarity, output channel switching, and no-load switching all require manual operation of the switches on the front panel of the aging station. It is impossible to alarm and respond to abnormal test conditions in a timely manner, and it is impossible to monitor the subtle changes in product performance during aging (also known as aging testing) in a timely manner. Stress screening tests have the characteristics of large workload, high operating risks, and low efficiency. They are also greatly affected by the operator's status and subjective factors, resulting in unstable monitoring quality, low monitoring accuracy, poor reliability, and other problems, which are not conducive to large-scale long-term quality tracking and record management. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention proposes an automated measurement and control system and related measurement and control methods for a controller environmental stress screening test. By adopting a host computer, a measurement and control combination, a CAN communication interface, a controller under test, and an aging cable, an automated measurement and control system and method for a controller environmental stress screening test based on the CAN communication protocol are proposed, which realizes automatic control and detection of various electrical parameters in the controller environmental stress screening test. The data detection results can be displayed by the host computer through imaging and automatically generate reports. In addition, through the expansion of the CAN interface, the system can meet the needs of automatically monitoring and controlling 120 controllers at the same time, greatly improving the measurement and control efficiency in aging, life extension, and routine tests. Through the one-time setting requirements of the host computer, the full process operation in the test process is automatically completed, which releases manpower, simplifies the operation, and strongly guarantees the quality of the controller product.

[0004] In order to solve at least one of the above technical problems, the technical solution adopted by the present invention is:

[0005] An automated measurement and control system for environmental stress screening tests of controllers, including a host computer and a measurement and control combination. The host computer can simultaneously connect (expanded through a CAN communication interface) and control 40 measurement and control combinations. The measurement and control combination mainly includes at least 3 aging control modules, at least 3 signal transfer modules, an aging power supply module, a power supply bias module, a power supply module (2 AC / DC power supply modules), and a display module; at the same time, the measurement and control combination preferably also includes a CAN communication interface (communication connection with the host computer) and an external connector (connected to the product under test - the controller). Therefore, each aging control module can perform a control test on a controller under test. In this system, the host computer can meet the requirements of automatically monitoring and controlling at least 120 controllers at the same time.

[0006] Among them, the aging control module can control the tested controller through the signal conversion module; the aging control module controls the aging power supply module to provide power supply control for at least one tested controller; among them, there is a main aging control module in the aging control module, and the others are auxiliary aging control modules; the main aging control module communicates with the host computer through the CAN communication interface, performs communication control on the auxiliary aging control module and the display module, and controls the output of the power supply module to the aging power supply module through the power pull-bias module.

[0007] The power supply module includes two AC / DC power supply modules. The first power supply module supplies power to the controller under test through the output of the aging power supply module; the second power supply module supplies power to each component in the measurement and control combination.

[0008] Generally, according to the interface conditions in the main aging control module, up to 4 auxiliary aging control modules can be controlled and connected, that is, the measurement and control combination can have 5 aging control modules. Preferably, this article takes 3 aging control modules in 1 measurement and control combination as an example for description, of which 1 is the main one and 2 are auxiliary ones.

[0009] The aging control module mainly includes an embedded single-chip microcomputer, a D / A conversion circuit, an A / D conversion circuit, an output circuit and an impedance matching circuit. Among them, the embedded single-chip microcomputer in the main aging control module communicates and controls with the host computer through the CAN protocol chip through a CAN communication interface, communicates and controls with two embedded single-chip microcomputers of the auxiliary aging control modules through a 2-way serial interface, and communicates and controls with the display module through a 1-way serial interface. The D / A conversion circuit converts the control instructions of the embedded single-chip microcomputer into controller input instructions and transmits them to the signal transfer module and the A / D conversion circuit at the same time; the A / D conversion circuit converts the corresponding detection parameters of the measured controller collected into digital signals and transmits them to the embedded single-chip microcomputer; the embedded single-chip microcomputer also has an audible and visual alarm device that responds to abnormal parameters. The output circuit is used to realize the embedded single-chip microcomputer's control of the aging power module, the power bias module (only the output circuit of the main aging control module) and the signal transfer module; the impedance matching circuit realizes the protection of the embedded single-chip microcomputer.

[0010] The input instructions of each controller under test are sent from the host computer to the embedded single-chip microcomputer of the main aging control module through the CAN communication interface. The embedded single-chip microcomputer of the main aging control module is sent to the embedded single-chip microcomputer of the 2-way auxiliary aging control module through the 2-way serial communication interface. The input instructions are processed by the embedded single-chip microcomputers of the main and auxiliary aging control modules and sent to the D / A conversion circuit through serial communication. The D / A conversion circuit converts the digital information into the analog input instructions required by the controller under test, transmits it to the signal transfer module and further sends it to the controller under test.

[0011] The power supply voltage, current consumption, input instructions, output instructions and other parameters of each controller under test are detected and collected simultaneously through the A / D conversion circuit of each aging control module, converted into digital signals, and sent to each embedded single-chip computer for information processing through the serial communication interface. The information processed by the two auxiliary aging control module embedded single-chip computers is sent to the main aging control module embedded single-chip computer through their respective serial communication interfaces. The main aging control module embedded single-chip computer sends the measurement and control information of the three controllers under test to the host computer through the CAN communication interface. The host computer measurement and control software displays the measurement and control information in real time. Once the measurement and control information is abnormal, the host computer issues a power cut-off command to control the hardware circuit to cut off the power supply module and make the sound and light alarm device alarm.

[0012] The control commands of each controller under test are sent from the host computer to the embedded single-chip microcomputer of the main aging control module through the CAN communication interface. The embedded single-chip microcomputer of the main aging control module is sent to the embedded single-chip microcomputer of the 2-way auxiliary aging control module through the 2-way serial communication interface. After being processed by the embedded single-chip microcomputers of the main and auxiliary aging control modules, the control commands are output by I / O to control the multi-channel relays on the signal transfer module, aging power supply module, and power supply deviation module to realize functions such as output signal acquisition, power-on and power-off timing, and power supply voltage deviation.

[0013] The host computer control measurement and control software displays measurement and control information and control commands in the form of reports and graphics. The host computer will realize real-time printing and output, and automatically save information. The main aging control module is responsible for communicating with the host computer through the CAN / USB communication interface, and serially communicating with other auxiliary aging control modules. The controller input and output and other command collection and detection, input command generation, and control signal transfer module, aging power supply module, power pull module, etc. The signal transfer module is responsible for the input command of the aging product and the on-off of the output command channel. The aging power supply module is responsible for the collection of power on and off, power supply voltage, and current consumption of the controller under test. The power pull module is responsible for controlling the output voltage of the power supply module. The display module is responsible for the real-time display and setting of the aging parameter information of the controller under test.

[0014] Furthermore, each measurement and control combination is connected to three controllers through three aging cables and performs automatic measurement and control on them. Each measurement and control combination is connected to the CAN bus through the CAN communication interface. The CAN bus is connected to the host computer through the USBCAN-E-mini conversion module. The three measured controllers are connected to the three connectors on the rear panel of the measurement and control combination in the measurement and control system through three aging cables. The controller power-on and power-off duration is commanded by the host computer and sent to the CAN1 communication interface on the rear panel of the measurement and control combination through the USBCAN-E-mini conversion module and the communication cable. The CAN1 communication interface is embedded with the main aging control module. The CAN communication port of the embedded single-chip microcomputer U1 (STM32F103-64) is connected, the serial communication USART1 port of the main aging control module U1 is connected to the CAN2 communication interface of the module behind the measurement and control combination, the serial communication USART2 port of the main aging control module U1 is connected to the communication port of the display module on the front panel of the measurement and control combination, the serial communication USART3 of the main aging control module U1 is connected to the serial communication USART1 port of the first auxiliary aging control module U1, and the serial communication USART4 of the main aging control module U1 is connected to the serial communication USART1 of the second auxiliary aging control module U1.

[0015] Furthermore, the measurement and control system is interconnected and communicates with the controller under test. The measurement and control system also has a connector for connecting to a fixed connection interface of the controller under test. The controller achieves monitoring and control by docking with the connector interface of the measurement and control system. The connector interface of the measurement and control system can be flexibly used to convert the packaging form of the connector interface of the controller under test through a special adapter cable, so that the packaging form of the connection interface of the controller under test matches the measurement and control system interface.

[0016] Furthermore, the host computer software and hardware support self-identification of operation. The measurement and control system can be automatically set by simply connecting the adapter cable, and prompt to call the preset parameters of the memorized project, eliminating the need for manual secondary operation settings.

[0017] Furthermore, the aging control module, the signal transfer module, the aging power module, the power pull-bias module, and the power supply module are fixed on the bottom plate of the device, and the display module is fixed on the front panel.

[0018] Furthermore, the host computer control and measurement software in the present invention preferably adopts the C# programming language and has the following functions:

[0019] (a) Self-test and calibration: The measurement and control system reserves a system calibration port to facilitate the measurement unit to measure the test equipment. After the self-test and calibration are completed, the results of the self-test and calibration can be stored and printed.

[0020] (b) User management: It is divided into administrator rights and general user rights. General user rights include logging into the test system, using the test system for debugging and testing, querying, printing data tables, and being able to modify their own user passwords; administrators can add or delete users and have database management rights.

[0021] (c) Database: including database usage, management authority settings; data query, statistics, comparison, etc. Intelligent aging mode: The function can select the aging mode of the controller under test according to the technical requirements of the controller under test, automatically count the accumulated power-on time, and automatically control the start or stop.

[0022] (d) Quality and safety protection: The voltage / overvoltage and current / overcurrent of each power supply can be set. In the event of overvoltage or overcurrent exceeding the limit, the power supply will be automatically cut off to protect the controller under test.

[0023] (e) Display: The current power supply voltage, current, power-on time of the controller under test, and the status of various functional output parameters can be displayed in real time and in the form of visual images.

[0024] (f) After aging is completed, the final aging test data can be saved and a report can be generated and printed.

[0025] (g) Realize the reception, display and classified storage of the old electrical parameter information of the controller under test.

[0026] Furthermore, the present invention also provides a method for automatically controlling the power supply and power-off duration of the controller using the above-mentioned measurement and control system, comprising the following steps:

[0027] (1) When controller 1 is powered on, the main refining control module issues a command to turn on the +B power supply relay contact on the refining power module. At the same time, +B is conditioned by the refining power module and sent to the main refining control module A / D conversion circuit and embedded single-chip microcomputer for detection. The embedded single-chip microcomputer sends the detected +B voltage value to the host computer and display module for real-time display.

[0028] (2) After +B passes the test, the main aging control module issues a command to turn on the power supply relay contacts of the tested controller 1 on the aging power module to energize the power supply end of controller 1. At the same time, +B is converted into voltage by the current sensor (i.e., the I / U conversion circuit shown) and sent to the main aging control module A / D conversion circuit and embedded single-chip microcomputer for detection. The detected consumption current value is sent to the host computer and display module for real-time display.

[0029] (3) Once the main block aging control module detects that the +B voltage or the current consumption value of controller 1 is abnormal, the main aging control module stops issuing instructions to disconnect the +B power supply relay contacts on the aging power module, cut off the power +B output and sound and light alarm device alarm.

[0030] (4) When the controller 1 under test runs according to the program and needs to be powered off, the main burn-in control module stops issuing instructions to disconnect the power supply relay contacts of the controller 1 on the burn-in power module, cutting off the power supply output of the controller 1. At the same time, the host computer and the display module show that the controller 1 under test is in the power-off state.

[0031] (4) The power-off duration of the controller under test 1 can also be personalized through the host computer or the display module. The method and steps for automatically controlling the power-off duration of the controllers under test 2 and 3 are the same as those of the controller under test 1.

[0032] Furthermore, the present invention also provides a method for automatically controlling the power supply deviation of the controller using the above measurement and control system, comprising the following steps:

[0033] The power supply module in the measurement and control combination automatically realizes any voltage output of 25V, 28V, and 31V to power the three controllers according to the program requirements. Under normal circumstances, the power supply module outputs 28V. When the program runs to the point where 31V output is required, the main refining control module issues an instruction to turn on the relay contact of the power pull-bias module that controls the 31V output of the power supply module, and the power supply module achieves 31V output. When the program runs to the point where 25V output is required, the main refining control module issues an instruction to turn on the relay contact of the power pull-bias module that controls the 25V output of the power supply module, and the power supply module achieves 25V output. At the same time, the output voltage of the power supply module is conditioned by the refining power supply module and then sent to the A / D conversion circuit and embedded single-chip microcomputer of the main refining control module for detection. The embedded single-chip microcomputer sends the detected voltage value to the host computer and the display module for real-time display. Once the main refining control module detects an abnormal voltage value, the main refining control module stops issuing instructions to disconnect the +B power supply relay contact on the refining power supply module, cut off the power supply +B output, and make the sound and light alarm device alarm.

[0034] Furthermore, the present invention also provides a method for the above measurement and control system to realize automatic generation and monitoring of controller input instructions, comprising the following steps:

[0035] (1) The input command of the controller 1 under test is realized by the embedded single-chip microcomputer of the main refining control module controlling the output command of the D / A conversion circuit. At the same time, the output command is detected by the A / D conversion circuit and the embedded single-chip microcomputer of the main refining control module. The embedded single-chip microcomputer sends the detected command to the host computer and the display module for real-time display. Once the main refining control module detects that the command is abnormal, the main refining control module stops issuing commands to disconnect the input command conduction relay of the controller 1 under test on the signal transfer module and the +B power supply relay contact on the refining power supply module, cut off the power supply +B output and input command, and make the sound and light alarm device alarm.

[0036] (2) The input command of the controller under test 1 can also be personalized through the host computer or display module. The method of automatically generating and monitoring the input command of the controller under test 2, 3 and the controller under test 1 is the same.

[0037] Furthermore, the present invention also provides a method for realizing automatic monitoring of controller output instructions by a measurement and control system, comprising the following steps:

[0038] The four-way output instructions of the tested controller 1 are detected by the A / D conversion circuit and embedded single-chip microcomputer of the main refining control module, and the embedded single-chip microcomputer sends the detected instructions to the host computer and the display module for real-time display. Once the main refining control module detects that the four-way output instructions are abnormal, the main refining control module stops issuing instructions to disconnect the input instruction conduction relay of the tested controller 1 on the signal transfer module and the +B power supply relay contact on the refining power supply module, cut off the power supply +B output and input instructions, and make the sound and light alarm device alarm.

[0039] On this basis, the present invention provides an automated measurement and control method for a controller environmental stress screening test, comprising the following steps:

[0040] (1) Establishing the project: The host computer establishes the controller measurement and control project, sets the measurement and control items, power supply voltage, single unit power supply current, cumulative power-on time, single cycle plus power-off time, input and output instructions and other parameter fuse thresholds, selects the aging mode, and fills in the controller number and other information;

[0041] (2) Measurement and control: According to the set parameters, the host computer issues control instructions to the aging control module. After the aging control module recognizes the instructions, it outputs control instructions to control the aging power module, the signal transfer module, and the power bias module, thereby performing power-on aging monitoring on the controller under test. The aging parameter information of the controller under test is displayed, judged, and saved in real time through the display control interface of the host computer. The display module displays the parameter information of the controller under test in real time. When the monitored aging parameter information deviates from the required value, the host computer issues an instruction to cut off all input and output instructions.

[0042] (3) Data storage and alarm: After the aging is completed, the host computer prompts real-time printing. If there are any abnormal aging parameters, the cause and time of the abnormality will be displayed.

[0043] The beneficial effects of the present invention include at least: the present invention proposes an automated measurement and control system and method for controller environmental stress screening test based on CAN communication protocol by adopting a host computer, a measurement and control combination, a CAN communication interface, a controller under test, and an aged cable, which realizes the automatic control and detection of power supply and power-off duration, power supply voltage deviation, input instructions, output instructions, and various electrical parameters of the controller in the controller environmental stress screening test. The data detection results can be displayed by the host computer imaging and automatically generate reports, which greatly improves the reliability and stability of the system for environmental stress screening tests and ensures the accuracy and traceability of data. At the same time, the system can be expanded through the CAN interface to meet the automatic monitoring and control of 120 controllers at the same time, which greatly improves the detection efficiency and detection accuracy of the environmental stress screening test while ensuring the stability and reliability of the system, and reduces the management of quality problems and production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a schematic diagram of the composition of the automatic measurement and control system for the environmental stress screening test of the controller of the present invention.

[0045] Figure 2 It is a schematic diagram of the measurement and control combination of the present invention.

[0046] Figure 3 It is a schematic diagram of the circuit structure state of the main aging control module of the present invention.

[0047] Figure 4 It is a schematic diagram of the circuit structure state of the aging power supply module of the present invention.

[0048] Figure 5 It is a flow chart of the automatic control program of the power supply and power-off duration of the controller of the present invention.

[0049] Figure 6 It is a flow chart of the automatic control program of the power supply deviation of the controller of the present invention.

[0050] Figure 7 It is a flow chart of the automatic generation and monitoring program of the controller input command of the present invention.

[0051] Figure 8 It is a flow chart of the automatic monitoring program of the controller output instruction of the present invention.

[0052] Figure 9 is a schematic diagram of the principle of some components in the measurement and control combination of the present invention. Among them, Figure 9 (a) is the pin definition diagram of the embedded single-chip microcomputer; Figure 9 (b) is the output circuit of the aging control module; Figure 9 (c) is the power supply control circuit of the aging power supply module; Figure 9 (d) is the voltage divider circuit; Figure 9 (e) is the impedance matching circuit; Figure 9 (f) is the A / D conversion circuit; Figure 9 (g) is the I / U conversion circuit. DETAILED DESCRIPTION

[0053] In order to make those skilled in the art better understand the technical scheme of the present invention, the present invention is further described in detail below in conjunction with specific embodiments. The embodiments described below are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. If no specific technology or conditions are specified in the embodiments, the technology or conditions described in the literature in this area or the product specification are used.

[0054] Figure 1 The figure is a schematic diagram of the composition of the automatic measurement and control system for the environmental stress screening test of the controller of the present invention, which mainly includes a host computer, a measurement and control combination, and a controller to be measured.

[0055] Figure 2 This is a schematic diagram of the composition of the measurement and control combination of the present invention. Each measurement and control combination includes 3 aging control modules, 3 signal switching modules, 1 aging power supply module, 1 power pull-bias module, 2 AC / DC power supply modules (1 power supply for internal components is not shown), 1 display module, 1 CAN communication interface and external connector. It can automatically monitor and control 3 controllers at the same time. Through the CAN interface expansion, 1 host computer can control 40 measurement and control combinations at the same time, which can meet the needs of automatically monitoring and controlling 120 controllers at the same time.

[0056] Each measurement and control combination has 3 burn-in control modules, 1 of which is the main one (burn-in control module 1) and 2 are auxiliary ones (burn-in control modules 2 and 3). Figure 3 As shown in the figure, the CAN communication interface of the embedded single-chip microcomputer in the main aging control module communicates and controls with the host computer through the CAN protocol chip, communicates and controls with the embedded single-chip microcomputers of the two auxiliary aging control modules through 2 serial communication interfaces; and communicates with the display module through 1 serial interface. Each measurement and control combination has 3 external connectors to connect 3 controllers, and each measurement and control combination is connected to the CAN bus through the CAN communication interface, and the CAN bus is connected to the host computer. The host computer, aging monitoring and display control combination, connecting cables, the controller under test, and the cabinet are connected to form an intelligent aging monitoring system based on the CAN communication protocol to realize the functions of aging parameter detection and interpretation of the controller under test.

[0057] like Figure 5 As shown in the figure, the present invention provides a method for realizing automatic control of power supply and power-off duration of a controller by a measurement and control system, comprising the following steps:

[0058] When power is on, Figure 4As shown in , the main refining control module issues an instruction to turn on the +B power supply relay contact on the refining power module. At the same time, +B is conditioned by the refining power module and sent to the A / D conversion circuit and embedded single-chip microcomputer of the main refining control module for detection. The embedded single-chip microcomputer sends the detected +B voltage value to the host computer and display module for real-time display. After +B passes the test, the main refining control module issues an instruction to turn on the controller power supply relay contact on the refining power module to power on the controller 1 control power supply terminal. At the same time, +B is converted into voltage by the current sensor and sent to the A / D conversion circuit and embedded single-chip microcomputer of the main refining control module for detection. The detected consumption current value is sent to the host computer and display module for real-time display. Once the main refining control module detects that the +B voltage or the current consumption value of the measured controller 1 is abnormal, the main refining control module stops issuing instructions to disconnect the +B power supply relay contact on the refining power module and cut off the power supply +B output.

[0059] like Figure 6 As shown in the figure, the present invention provides a method for realizing automatic control of controller power supply deviation by a measurement and control system, comprising the following steps:

[0060] The power supply module in the measurement and control combination automatically realizes any voltage output of 25V, 28V, and 31V to power the three controllers according to the program requirements. In this example, it is executed in the order of 28V, 31V and 25V. Under normal circumstances, the power supply module outputs 28V. When the program runs to the point where it needs to output 31V, the main aging control module 31 issues an instruction to turn on the relay contact on the power pull-bias module that controls the 31V output of the power supply module, and the power supply module achieves 31V output. When the program runs to the point where it needs to output 25V, the main aging control module issues an instruction to turn on the relay contact on the power pull-bias module that controls the 25V output of the power supply module, and the power supply module achieves 25V output. At the same time, the output voltage of the power supply module is conditioned by the aging power module and then sent to the A / D digital conversion circuit and embedded single-chip microcomputer of the main aging control module for detection. The embedded single-chip microcomputer sends the detected voltage value to the host computer and display module for real-time display. Once the main aging control module detects an abnormal voltage value, the main aging control module stops issuing instructions to disconnect the +B power supply relay contacts on the aging power module, cut off the power +B output and sound and light alarm device alarm.

[0061] like Figure 7 As shown in , the present invention also provides a method for the measurement and control system to realize automatic generation and monitoring of controller input instructions, comprising the following steps:

[0062] (1) The controller 1 input command is realized by the embedded single-chip microcomputer of the main refining control module controlling the D / A conversion circuit output command. At the same time, the input command is detected by the A / D conversion circuit and embedded single-chip microcomputer of the main refining control module. The embedded single-chip microcomputer sends the detected input command to the host computer and the display module for real-time display. Once the main refining control module detects that the input command is abnormal, the main refining control module stops issuing commands to disconnect the input command conduction relay on the signal transfer module and the +B power supply relay contact on the refining power supply module, cut off the power supply +B output and input command, and make the sound and light alarm device alarm.

[0063] (2) The input command of controller 1 can also be personalized through the host computer program or display module. The method of automatically generating and monitoring the input command of controllers 2, 3 and controller 1 is the same.

[0064] like Figure 8 As shown in the present invention, the present invention also provides a method for realizing automatic monitoring of controller output instructions by a measurement and control system, comprising the following steps:

[0065] The four-way output instructions of controller 1 are detected by the A / D conversion circuit and embedded single-chip microcomputer of the main refining control module, and the embedded single-chip microcomputer sends the detected four-way output instructions to the host computer and the display module for real-time display. Once the main refining control module detects that the four-way output instructions are abnormal, the main refining control module stops issuing instructions to disconnect the input instruction conduction relay on the signal transfer module and the +B power supply relay contact on the refining power supply module, cut off the power supply +B output and input instructions, and make the sound and light alarm device alarm.

[0066] According to the above method, the present invention proposes an automated test procedure for a controller environmental stress screening test, the specific process of which is as follows:

[0067] (1) Establishing a project: The host computer establishes a controller measurement and control project with the project name XX, sets the measurement and control items, power supply voltage, single unit current consumption, cumulative power-on time, single cycle plus power-off time, input and output signal parameters, selects the aging mode, and fills in the controller number and other information;

[0068] (2) Start measurement and control: The host computer issues a command and sends it to the aging control module through the CAN communication interface. After the aging control module recognizes the command, it controls the aging power module, signal transfer module, and power bias module to perform power-on aging monitoring on the controller under test. For example, the host computer program has set the power supply voltage to 28V, the cumulative aging time to 600 hours, the single cycle power-on for 8 hours, and the power-off for 1 hour, of which 28V has accumulated power-on for 300 hours, 25V has accumulated power-on for 150 hours, and 31V has accumulated power-on for 150 hours. The input signal is 0.505V, and the 4-way output instructions are all 1V. The current consumption of a single unit is less than 0.15A. After confirming that the status is correct, click Confirm, and the power-on aging monitoring of the controller under test will officially begin. The aging parameter information of each controller under test is displayed, interpreted, and saved in real time through the host computer display and control software interface, and the aging status information of the controller under test can be queried and printed. The display module on the front panel of the aging monitoring display and control combination displays the aging product parameter information in real time. When the aging parameter information monitored by the host computer deviates from the required value, a command is issued to cut off all input and output instructions to protect product safety.

[0069] (3) Design parameter error range: Based on the above settings, the 28V voltage error range is 28±1V, the 25V voltage error range is 25±1V, the 31V voltage error range is 31±1V, the cumulative aging time error range is 600±0.1 hours, the single-cycle power-on time error range is 8±0.1 hours, the single-cycle power-off time error range is 1±0.1 hours, the input signal error range is 0.505V±0.05V, and the 4-way output command error range is: 1V±0.05V.

[0070] Assume that during the aging monitoring, a tested controller XX product malfunctions, causing one of the four output commands to be 1.2V, which exceeds the output command error range. When the parameter information monitored by the host computer deviates from the required value, a command is issued to cut off all input and output commands to protect product safety.

[0071] (4) Data storage and alarm: After the aging is completed, the host computer prompts real-time printing. If there are any abnormal aging parameters, the cause and time of the abnormality will be displayed.

[0072] As shown in the schematic diagram of the circuit principle of the examples in Figures 9 (a) to (g), the basic process of power supply and power-off duration control is as follows: After the main aging control module U1 receives the working instruction of the host computer or the display module, the U1 / 9 pin I / O port sends an instruction to the primary of the photocoupler U13, so that the secondary U13 / 3 and U13 / 4 of U13 are turned on. Since U13 / 4 is connected to the 12V ground, U13 / 3 is connected to the negative control terminal of the aging power module relay K4, and the positive control terminal of K4 is connected to +12V, so that the relay K The 4-wire package is powered on, and the two groups of normally open contacts K4 / 8-12 and 5-9 are energized. After the ±B power supply is turned on, the -B power supply is connected to the -B power supply terminal of the controller. +B is converted into VBOUT after voltage division and isolation by the voltage divider circuit of the aging power supply module and sent to the impedance matching circuit, A / D conversion circuit and U1 of the aging control module. U1 sends the +B voltage value to the host computer for display through the CAN serial communication port, and the USART2 serial communication port of U1 sends the +B voltage value to the display module on the front panel of the measurement and control combination for display. Then, after the main aging control module U1 determines that the +B voltage value is qualified, the U1 / 10 pin I / O port sends an instruction to the primary of the optocoupler U14, so that the secondary U14 / 3 and U14 / 4 of U14 are turned on. Since U14 / 4 is connected to the 12V ground, U14 / 3 is connected to the negative control terminal of the aging power module relay K1, and the positive control terminal of K1 is connected to +12V, so that the relay K1 coil is energized, and the two sets of normally open contacts K1 / 3-4 are energized, and +B is sent to the +B power supply terminal of the controller 1 through the I / U conversion circuit. At the same time, +B is sent to the impedance matching circuit, A / D conversion circuit, and U1 of the aging control module through the I / U conversion circuit output I1OUT. U1 sends the current consumption value of the controller 1 to the upper computer for display through the CAN serial communication port, and the USART2 serial communication port of U1 sends the current consumption value of the controller 1 to the display module on the front panel of the measurement and control combination for display.

[0073] After the main aging control module U1 receives the power-off command of the controller 1 from the host computer or the display module, the I / O port of the main aging control module U1 / 10 pin stops issuing commands to the primary of the optocoupler U14, so that the secondary U14 / 3 and U14 / 4 of U14 are disconnected and conductive. Since U14 / 4 is connected to the 12V ground, U14 / 3 is connected to the negative control terminal of the aging power module relay K1, and the positive control terminal of K1 is connected to +12V, the relay K1 coil is de-energized, and the two groups of normally open contacts K1 / 3-4 are disconnected, so that the controller 1 is powered off. U1 sends the power-off information of the controller 1 to the host computer for display through the CAN serial communication port, and the USART2 serial communication port of U1 sends the power-off information of the controller 1 to the display module on the front panel of the measurement and control combination for display.

[0074] To sum up: the present invention proposes an automated measurement and control system for controller environmental stress screening test, which has the advantages of high precision, reliable performance, high degree of automation, strong versatility, simple operation and high efficiency. Through external interface expansion, it can carry out automated test control of environmental stress tests of large quantities of aerospace products, which greatly improves the test efficiency while ensuring the electrical performance of the product, and meets the large-scale and high-standard measurement and control needs of current aerospace products.

[0075] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention. At the same time, a person skilled in the art may make changes in the specific implementation methods and scope of application based on the ideas of the present application.

Claims

1. A method for automatically controlling the duration of power supply and power failure of a controller, characterized in that: The method comprises the following steps: (1) The controller under test is powered on, and the main aging control module and / or the auxiliary aging control module issue instructions to turn on the power supply relay contacts of the aging power module. At the same time, the power is conditioned by the aging power module and then sent to the main aging control module and / or the auxiliary aging control module for detection. The main aging control module and / or the auxiliary aging control module sends the detected power supply voltage value to the host computer and the display module through the main aging control module for real-time display; (2) After the power supply is tested and found to be qualified, the main aging control module and / or the auxiliary aging control module issues a command to turn on the power supply relay contacts of the corresponding controller under test on the aging power module, thereby energizing the control power supply end; at the same time, the power supply is converted into voltage by the current sensor and sent to the main aging control module and / or the auxiliary aging control module for testing, and the detected consumption current value is sent to the host computer and the display module through the main aging control module for real-time display; (3) Once the main aging control module and / or the auxiliary aging control module detects that the power supply voltage value in step (1) or the consumption current value in step (2) is abnormal, the main aging control module and / or the auxiliary aging control module stops issuing instructions, disconnects the power supply relay contacts on the aging power supply module, cuts off the power output and issues an audible and visual alarm; at the same time, the host computer or the display module displays the power-off status of the controller under test, and the power-off duration can also be personalized through the host computer program or the display module; The method is based on an automated measurement and control system, which includes a host computer and at least one measurement and control combination, wherein the host computer performs communication control on the measurement and control combination, and the measurement and control combination performs control test on at least one controller under test; the measurement and control combination includes at least three aging control modules, a signal switching module, an aging power supply module, a power supply bias module, a power supply module and a display module; Among them, there is a main aging control module in the aging control module, and the others are auxiliary aging control modules; wherein the main aging control module and the auxiliary aging control module: (1) performing a control test on the controller under test through the signal transfer module; and (2) controlling the burn-in power module to provide power supply control for the at least one controller under test; Wherein, the main aging control module also: (3) Communicating with the host computer through the CAN communication interface; (4) performing communication control on the display; (5) performing communication control on the auxiliary aging control module; and (6) Controlling the output of the power supply module to the aging power supply module through the power bias module.

2. A controller power supply and power-off duration automatic control method according to claim 1, characterized in that: The aging control module includes an embedded single-chip microcomputer, a D / A conversion circuit, an A / D conversion circuit, an output circuit, and an impedance matching circuit; wherein the embedded single-chip microcomputer of the main aging control module communicates and controls the embedded single-chip microcomputer of the auxiliary aging control module and the display module through a serial communication interface, and communicates with the host computer through a CAN protocol chip; the D / A conversion circuit converts the control instructions of the embedded single-chip microcomputer into controller input instructions and transmits them to the signal switching module and / or the A / D conversion circuit; the A / D conversion circuit converts the collected corresponding detection parameters of the controller under test into digital signals and transmits them to the embedded single-chip microcomputer; the embedded single-chip microcomputer also has an audible and visual alarm device that responds to parameter abnormalities; the output circuit is used to realize the control of the embedded single-chip microcomputer on the aging power supply module, the power supply bias module or the signal switching module respectively; the impedance matching circuit realizes protection for the embedded single-chip microcomputer.

3. A controller power supply and power-off duration automatic control method according to claim 1, characterized in that: The host computer in the measurement and control system can control 40 measurement and control combinations at the same time, and realize environmental stress screening of at least 120 controllers under test.

4. A controller power supply and power-off duration automatic control method according to claim 1, characterized in that: The power supply module includes two power supply modules. The first power supply module supplies power to the controller under test via the output to the aging power supply module; the second power supply module supplies power to each component in the measurement and control combination.

5. A controller power supply and power-off duration automatic control method according to claim 4, characterized in that: The signal conversion module is used for opening and closing the paths of input instructions and output instructions of the controller under test; the aging power supply module is used for collecting the power on and off, supply voltage, and current consumption of the controller under test; the power bias module is used to control the output voltage of the first power supply module; the display module is used for displaying parameter information and touch settings.

6. A controller power supply and power-off duration automatic control method according to any one of claims 1-4, characterized in that: The measurement and control system further specifically includes a connector for interconnecting and communicating with the measured controller. The measured controller achieves monitoring and control and realizes packaging by docking with the measurement and control system connector interface.

7. A method for automatically monitoring input instructions and output instructions of a controller, characterized in that: The method comprises the following steps: (1) The controller input command is implemented by the embedded single-chip microcomputer of the main refining control module and / or the auxiliary refining control module issuing the command and controlling the D / A conversion circuit to transmit it to the signal transfer module; at the same time, the input command is detected by the A / D conversion circuit and embedded single-chip microcomputer of the main refining control module and / or the auxiliary refining control module, and the detected input command is sent to the host computer and the display module through the main refining control module for real-time display; (2) Once the main aging control module and / or the auxiliary aging control module detects an abnormal input command, the main aging control module and / or the auxiliary aging control module stops issuing commands, disconnects the input command conduction relay on the signal transfer module and the power supply relay contacts on the aging power supply module, cuts off the power supply output and input commands, and issues an audible and visual alarm; (3) The controller input instructions can also be personalized through the host computer program or display module; (4) The output instructions of the controller are detected by the A / D conversion circuit and the embedded single-chip microcomputer of the main aging control module and / or the auxiliary aging control module, and the embedded single-chip microcomputer sends the detected output instructions to the host computer and the display module through the main aging control module for real-time display; (5) Once the main aging control module and / or the auxiliary aging control module detects an abnormal output command, the main aging control module and / or the auxiliary aging control module stops issuing commands, disconnects the input command conduction relay on the signal transfer module and the power supply relay contacts on the aging power supply module, cuts off the power supply output and input command, and issues an audible and visual alarm; The method is based on an automated measurement and control system, which includes a host computer and at least one measurement and control combination, wherein the host computer performs communication control on the measurement and control combination, and the measurement and control combination performs control test on at least one controller under test; the measurement and control combination includes at least three aging control modules, a signal switching module, an aging power supply module, a power supply bias module, a power supply module and a display module; Among them, there is a main aging control module in the aging control module, and the others are auxiliary aging control modules; wherein the main aging control module and the auxiliary aging control module: (1) performing a control test on the controller under test through the signal transfer module; and (2) controlling the burn-in power module to provide power supply control for the at least one controller under test; Wherein, the main aging control module also: (3) Communicating with the host computer through the CAN communication interface; (4) performing communication control on the display; (5) performing communication control on the auxiliary aging control module; and (6) Controlling the output of the power supply module to the aging power supply module through the power bias module.

8. The method for automatically monitoring input instructions and output instructions of a controller according to claim 7, characterized in that: The aging control module includes an embedded single-chip microcomputer, a D / A conversion circuit, an A / D conversion circuit, an output circuit, and an impedance matching circuit; wherein the embedded single-chip microcomputer of the main aging control module communicates and controls the embedded single-chip microcomputer of the auxiliary aging control module and the display module through a serial communication interface, and communicates with the host computer through a CAN protocol chip; the D / A conversion circuit converts the control instructions of the embedded single-chip microcomputer into controller input instructions and transmits them to the signal switching module and / or the A / D conversion circuit; the A / D conversion circuit converts the collected corresponding detection parameters of the controller under test into digital signals and transmits them to the embedded single-chip microcomputer; the embedded single-chip microcomputer also has an audible and visual alarm device that responds to parameter abnormalities; the output circuit is used to realize the control of the embedded single-chip microcomputer on the aging power supply module, the power supply bias module or the signal switching module respectively; the impedance matching circuit realizes protection for the embedded single-chip microcomputer.

9. The method for automatically monitoring input instructions and output instructions of a controller according to claim 7, characterized in that: The host computer in the measurement and control system can control 40 measurement and control combinations at the same time, and realize environmental stress screening of at least 120 controllers under test.

10. The method for automatically monitoring input instructions and output instructions of a controller according to claim 7, characterized in that: The power supply module includes two power supply modules. The first power supply module supplies power to the controller under test via the output to the aging power supply module; the second power supply module supplies power to each component in the measurement and control combination.

11. A method for automatically monitoring input instructions and output instructions of a controller according to claim 10, characterized in that: The signal conversion module is used for opening and closing the paths of input instructions and output instructions of the controller under test; the aging power supply module is used for collecting the power on and off, supply voltage, and current consumption of the controller under test; the power bias module is used to control the output voltage of the first power supply module; the display module is used for displaying parameter information and touch settings.

12. A method for automatically monitoring input instructions and output instructions of a controller according to any one of claims 7 to 10, characterized in that: The measurement and control system further specifically includes a connector for interconnecting and communicating with the measured controller. The measured controller achieves monitoring and control and realizes packaging by docking with the measurement and control system connector interface.

Images