I / F circuit automatic detection device and detection method

Abstract

The invention belongs to the technical field of circuit detection, and particularly discloses an I / F circuit automatic detection device which comprises a measurement and control box, an AC / DC power supply, an embedded industrial personal computer and a measurement and control board power supply control module are arranged in the measurement and control box, and power-on and power-off of a to-be-detected I / F circuit are programmed based on one path of GPIO of a measurement and control board; the comprehensive test module is used for controlling the constant current source to output according to test requirements based on an output instruction of the embedded industrial personal computer; and controlling the measurement and control board to be powered on, outputting a reference frequency scale, and completing pulse quantity signal detection so as to complete precision calculation of different channels of the I / F circuit to be detected. The measurement and control board and the embedded industrial personal computer are integrated in the measurement and control box, power is supplied to the measurement and control board and the embedded industrial personal computer through the AC / DC power supply, and the measurement and control board is provided with the core control chip and the peripheral circuit connected with the core control chip. Precision indexes of a power supply, reference frequency, pulse quantity reversible counting, automatic I / F circuit calculation and the like required by I / F circuit testing are provided, and I / F circuit precision testing is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of circuit detection, and in particular relates to an I / F circuit automatic detection device and a detection method. Background Art

[0002] The I / F conversion circuit is a circuit that converts current signals into digital pulses. Its main working principles include current integration and charge balance. It is mainly used to convert the current signal of the accelerometer into a pulse signal. Therefore, the characteristics of the I / F conversion circuit are of great significance to improving navigation accuracy.

[0003] I / F board testing requires power supply, reference current source interface, reference frequency, pulse output detection channel, and automatic calculation of I / F circuit zero position, scale factor, scale factor nonlinearity and other precision indicators. If tested manually, the standard instrument operation is cumbersome, the amount of data required to be measured is large, and the test parameter calculation is complex, which seriously affects production efficiency. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects in the prior art and provide an I / F circuit automatic detection device.

[0005] A first aspect of the present invention provides an I / F circuit automatic detection device, comprising:

[0006] A measurement and control box is connected to the I / F circuit to be measured, wherein an AC / DC power supply, an embedded industrial computer and a measurement and control board are arranged inside the measurement and control box, wherein the AC / DC power supply is electrically connected to the embedded industrial computer and the measurement and control board respectively, and the embedded industrial computer is connected to the measurement and control board via a CAN interface;

[0007] A constant current source, connected to the measurement and control board, for providing a stable current to the I / F circuit to be measured;

[0008] A power supply control module, which controls the power on and off of the I / F circuit to be tested based on the 1-way GPIO of the measurement and control board;

[0009] The comprehensive test module is used to control the output instructions of the embedded industrial computer and control the constant current source to output a stable current according to the test requirements through the measurement and control board based on the output instructions of the embedded industrial computer; and control the measurement and control board to power on, output a reference frequency standard, complete pulse quantity signal detection, and the embedded industrial computer obtains the pulse quantity signal to complete the accuracy calculation of different channels of the I / F circuit to be tested.

[0010] A further solution is that the I / F circuit automatic detection device further includes:

[0011] A data storage module, connected to the embedded industrial computer, for storing raw data and precision calculation results;

[0012] The file management module is connected to the data storage module and generates a test data file based on the original data and the accuracy calculation result for users to view and troubleshoot.

[0013] A further solution is that the AC / DC power supply is used to convert the AC220V voltage into a DC27V voltage to supply power to the embedded industrial computer and the measurement and control board respectively;

[0014] The measurement and control board includes a core control chip and a secondary power supply module and a peripheral circuit connected to the core control chip, and the core control chip is connected to the constant current source signal;

[0015] The secondary power supply module is used to convert the DC27V voltage into ±5V voltage and ±15V voltage, the ±5V voltage is used to power the core control chip, and the ±15V voltage is used to power the I / F circuit to be tested;

[0016] The peripheral circuit is used for CAN interface isolation, reference frequency standard output control and reversible counting.

[0017] A further solution is that the peripheral circuit includes a temperature compensated crystal oscillator, a reversible counter, and a CAN transceiver respectively connected to the core control chip;

[0018] The compensated crystal oscillator is used to output a reference frequency standard, the reversible counter is used for reversible counting of pulse quantity signals, and the CAN transceiver is used to send the reversible counting result to the embedded industrial computer.

[0019] A further solution is that the secondary power supply module includes an EC6A11 power conversion module and a SWH15 power conversion module;

[0020] The EC6A11 power conversion module is used to convert the DC27V voltage into ±5V voltage;

[0021] The SWH15 power conversion module is used to convert the DC27V voltage into ±15V voltage.

[0022] A further solution is that the core control chip is a 32-bit floating-point DSP, model TMS320F28335DSP.

[0023] A further solution is that the box structure of the measurement and control box is a 4U chassis, and a power switch, a voltage meter, an ammeter, an indicator light, a band switch and a test hole are arranged on the front panel of the box structure; a 220VAC three-core power single-phase socket, a product interface, a constant current source input interface, and a human-computer interaction display interface are arranged on the rear panel of the box structure;

[0024] The power switch, the current meter and the test hole are respectively connected to the AC / DC power supply, the voltage meter is respectively connected to the AC / DC power supply and the secondary power supply module through a band switch, and the indicator light is connected to the core control chip;

[0025] The 220VAC three-core power single-phase socket is connected to the AC / DC power supply, the product interface is connected to the I / F circuit to be tested through a test cable, the constant current source input interface is connected to the core control chip, and the human-computer interaction interface is connected to the embedded industrial computer.

[0026] A second aspect of the present invention provides an automatic detection method for an I / F circuit, using the above detection device, comprising the following steps:

[0027] The AC / DC power supply converts the AC220V voltage to DC27V voltage to supply power to the embedded industrial computer and the measurement and control board respectively;

[0028] The DC27V voltage entering the measurement and control board is converted into 5V voltage and ±15V voltage by the secondary power supply module to power the core control chip and I / F circuit respectively;

[0029] Based on the 1-way GPIO of the measurement and control board, the I / F circuit to be tested is powered on and the reference frequency standard is output;

[0030] The core control chip controls the constant current source to output multiple groups of stable currents according to the test requirements. The I / F circuit outputs different pulse quantities based on different stable currents. The reversible counter completes the reversible counting of the pulse signal and transmits it to the embedded industrial computer through the CAN interface for calculation, completing the accuracy calculation of each channel of the I / F circuit.

[0031] A further solution is that after completing the accuracy calculation of each channel of the I / F circuit, the original data and accuracy calculation results of the I / F circuit are saved and a test data file is generated for users to view and troubleshoot.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] The present invention integrates a measurement and control board and an embedded industrial computer in a measurement and control box, and powers the measurement and control board and the embedded industrial computer through an AC / DC power supply. A core control chip and a peripheral circuit connected to the core control chip are arranged on the measurement and control board, and precision indicators such as power supply, reference frequency, reversible counting of pulse quantity, and automatic calculation of I / F circuit required for testing an I / F circuit are provided, thereby realizing precision testing of the I / F circuit.

[0034] The present invention connects an industrial computer with a measurement and control board through a CAN interface; the measurement and control board automatically controls the I / F circuit to power on, outputs a reference frequency standard, completes reversible counting of pulse quantity signals, and the embedded industrial computer receives the counting result output by the measurement and control board to complete the accuracy detection of each channel of the I / F circuit.

[0035] The present invention arranges a secondary power supply module consisting of two power conversion modules of different models on the measurement and control board, which can convert the DC27V voltage into 5V voltage and ±15V voltage, wherein the ±5V voltage is used to power the core control chip, and the ±15V voltage is used to power the I / F circuit to be measured, thereby realizing the separate power-on requirements of the core control chip and the I / F circuit.

[0036] The present invention controls the power-on and power-off of a GPIO program-controlled I / F circuit to be tested of a measurement and control board through a power supply control module, controls the output instruction of an embedded industrial computer through a comprehensive test module to control the constant current source to output a stable current according to the test requirement through the measurement and control board; and controls the measurement and control board to power on, output a reference frequency standard, complete pulse quantity signal detection, complete accuracy calculation of different channels of the I / F circuit to be tested, realize automatic detection, and save the original data and accuracy calculation results of the I / F circuit and generate a test data file for users to view and troubleshoot. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The following drawings are only used to illustrate and explain the present invention, and are not used to limit the scope of the present invention, wherein:

[0038] Figure 1 : A block diagram of the composition of the present invention;

[0039] Figure 2 : Principle block diagram of the measurement and control box of the present invention;

[0040] Figure 3 : Schematic diagram of the front panel structure of the measurement and control box structure of the present invention;

[0041] Figure 4 : Schematic diagram of the rear panel structure of the measurement and control box structure of the present invention;

[0042] Figure 5 : The layout diagram of the measurement and control box of the present invention;

[0043] Figure 6 : Flow chart of the detection method of the present invention;

[0044] In the figure: 1. Measurement and control box; 2. AC / DC power supply; 3. Constant current source; 4. Embedded industrial computer; 5. Core control chip; 6. Secondary power supply module; 7. Reversible counter; 8. Measurement and control board; 9. Temperature compensated crystal oscillator; 10. CAN transceiver; 11. Human-computer interaction equipment; 12. Voltage meter; 13. Current meter; 14. Indicator light; 15. Test hole; 16. Power switch; 17. Human-computer interaction display interface; 18. 220VAC three-core power single-phase socket; 19. Product interface; 20. Constant current source input interface; 21. Power supply control module; 22. Comprehensive test module; 23. Data storage module; 24. File management module. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution, design method and advantages of the present invention clearer, the present invention is further described in detail by specific embodiments in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0046] Example 1

[0047] like Figure 1 and Figure 2 As shown, the present invention provides an I / F circuit automatic detection device, comprising:

[0048] A measurement and control box 1 and a human-computer interaction device 11 and a constant current source 3 connected to the measurement and control box 1; wherein the measurement and control box 1 is connected to the I / F circuit to be tested through a test cable; an AC / DC power supply 2, an embedded industrial computer 4 and a measurement and control board 8 are arranged inside the measurement and control box 1, the AC / DC power supply 2 is electrically connected to the embedded industrial computer 4 and the measurement and control board 8 respectively, the embedded industrial computer 4 is connected to the measurement and control board 8 through a CAN interface, and the constant current source 4 is connected to the measurement and control board 8, and is used to provide a stable current to the I / F circuit to be tested;

[0049] A power supply control module 21, which controls the power on and off of the I / F circuit to be tested based on one GPIO of the measurement and control board 8;

[0050] The comprehensive test module 22 controls the output instructions of the embedded industrial computer 4 and controls the constant current source 3 to output a stable current according to the test requirements through the measurement and control board 8 based on the output instructions of the embedded industrial computer 4; and controls the measurement and control board 8 to power on, output a reference frequency standard, complete the pulse quantity signal detection, and the embedded industrial computer 4 obtains the pulse quantity signal to complete the accuracy calculation of different channels of the I / F circuit to be tested;

[0051] A data storage module 23, connected to the embedded industrial computer 4, for storing raw data and precision calculation results;

[0052] The file management module 24 is connected to the data storage module 23 and generates a test data file based on the original data and the accuracy calculation result for users to view and troubleshoot.

[0053] The AC / DC power supply 2 is used to convert the AC220V voltage to the DC27V voltage, and respectively power the embedded industrial computer and the measurement and control board 8; the measurement and control board 8 includes a core control chip 5 and a secondary power supply module 6 and peripheral circuits connected to the core control chip 5, the core control chip 5 is a 32-bit floating-point DSP, model TMS320F28335DSP, and the core control chip 5 is signal-connected to the constant current source 3; the secondary power supply module 6 is used to convert the DC27V voltage into a 5V voltage and a ±15V voltage, the ±5V voltage is used to power the core control chip 5, and the ±15V voltage is used to power the I / F circuit to be tested; the peripheral circuit is used for CAN interface isolation, reference frequency standard output control and reversible counting.

[0054] In the above, the peripheral circuit includes a temperature compensated crystal oscillator 9, a reversible counter 7, and a CAN transceiver 10 respectively connected to the core control chip 5; the temperature compensated crystal oscillator 9 is used to output a reference frequency standard, the reversible counter 7 is used for reversible counting of pulse quantity signals, and the CAN transceiver 10 is used to send the reversible counting result to the embedded industrial computer 4. In this embodiment, the model of the temperature compensated crystal oscillator 9 is J-ZC550-5120K-V3-B5-E, the model of the CAN transceiver 10 is SM1040, and the model of the reversible counter 7 is B816 of the 772 Institute of Aerospace Electronics.

[0055] In order to meet the separate power-on requirements of the core control chip 5 and the I / F circuit, the secondary power supply module 6 of this embodiment includes an EC6A11 power conversion module and a SWH15 power conversion module; wherein the EC6A11 power conversion module is used to convert the DC27V voltage into a 5V voltage to power the core control chip 5, and the SWH15 power conversion module is used to convert the DC27V voltage into a ±15V voltage to power the I / F circuit.

[0056] like Figure 3-5As shown, the box structure of the measurement and control box 1 is a 4U chassis, and a power switch 16, a voltage meter head 12, an ammeter head 13, an indicator light 14 and a test hole 15 are arranged on the front panel of the box structure; a 220VAC three-core power single-phase socket 18, a product interface 19, a constant current source input interface 20, and a human-computer interaction display interface 17 are arranged on the rear panel of the box structure; the power switch 16, the ammeter head 13 and the test hole 15 are respectively connected to the AC / DC power supply 2, and the voltage meter head 12 is respectively connected to the AC / DC power supply 2 through a band switch. / DC power supply 2 is connected to the secondary power supply module 6, the indicator light 14 is connected to the core control chip 5; the 220VAC three-core power single-phase socket 18 is connected to the AC / DC power supply 2, the product interface 19 is connected to the I / F circuit to be tested through a test cable, the constant current source input interface 20 is connected to the core control chip 5, and the human-computer interaction display interface 17 is connected to the embedded industrial computer 4, for connecting the human-computer interaction device 11. In this embodiment, the human-computer interaction device 11 is a display, keyboard, mouse, etc.

[0057] Example 2

[0058] like Figure 6 As shown, this embodiment discloses an I / F circuit automatic detection method, which is completed by using the detection device of the embodiment, including the following steps:

[0059] The AC / DC power supply 2 converts the AC220V voltage into a DC27V voltage to supply power to the embedded industrial computer 4 and the measurement and control board 8 respectively;

[0060] The DC27V voltage entering the measurement and control board 8 is converted into 5V voltage and ±15V voltage by the secondary power supply module 6 to supply power to the core control chip 5 and the I / F circuit respectively;

[0061] Based on the 1-way GPIO of the measurement and control board 8, the I / F circuit to be measured is powered on and the reference frequency standard is output;

[0062] The core control chip 5 controls the constant current source 3 to output multiple groups of stable currents according to the test requirements. The I / F circuit outputs different pulse quantities based on different stable currents. The reversible counting of the pulse signal is completed by the reversible counter 7 and transmitted to the embedded industrial computer 4 through the CAN interface for calculation, completing the accuracy calculation of each channel of the I / F circuit;

[0063] After completing the accuracy calculation of each channel of the I / F circuit, the original data and accuracy calculation results of the I / F circuit are saved and a test data file is generated for users to view and troubleshoot.

[0064] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. An automatic detection device for an I / F circuit, characterized in that: include: A measurement and control box is connected to the I / F circuit to be measured, wherein an AC / DC power supply, an embedded industrial computer and a measurement and control board are arranged inside the measurement and control box, wherein the AC / DC power supply is electrically connected to the embedded industrial computer and the measurement and control board respectively, and the embedded industrial computer is connected to the measurement and control board via a CAN interface; A constant current source, connected to the measurement and control board, for providing a stable current to the I / F circuit to be measured; A power supply control module, which controls the power on and off of the I / F circuit to be tested based on the 1-way GPIO of the measurement and control board; The comprehensive test module is used to control the output instructions of the embedded industrial computer and control the constant current source to output a stable current according to the test requirements through the measurement and control board based on the output instructions of the embedded industrial computer; and control the measurement and control board to power on, output a reference frequency standard, complete pulse quantity signal detection, and the embedded industrial computer obtains the pulse quantity signal to complete the accuracy calculation of different channels of the I / F circuit to be tested.

2. The automatic detection device for an I / F circuit according to claim 1, characterized in that: It also includes a data storage module and a file management module; The data storage module is connected to the embedded industrial computer and is used to store original data and precision calculation results; the file management module is connected to the data storage module and generates a test data file based on the original data and precision calculation results for users to view and troubleshoot.

3. The automatic detection device for an I / F circuit according to claim 2, characterized in that: The AC / DC power supply is used to convert AC220V voltage to DC27V voltage to supply power to the embedded industrial computer and the measurement and control board respectively; The measurement and control board includes a core control chip and a secondary power supply module and a peripheral circuit connected to the core control chip, and the core control chip is connected to the constant current source signal; The secondary power supply module is used to convert the DC27V voltage into ±5V voltage and ±15V voltage, the ±5V voltage is used to power the core control chip, and the ±15V voltage is used to power the I / F circuit to be tested; The peripheral circuit is used for CAN interface isolation, reference frequency standard output control and reversible counting.

4. The automatic detection device for an I / F circuit according to claim 3, characterized in that: The peripheral circuit includes a temperature compensated crystal oscillator, a reversible counter, and a CAN transceiver respectively connected to the core control chip; The compensated crystal oscillator is used to output a reference frequency standard, the reversible counter is used for reversible counting of pulse quantity signals, and the CAN transceiver is used to send the reversible counting result to the embedded industrial computer.

5. The automatic detection device for an I / F circuit according to claim 4, characterized in that: The secondary power supply module includes an EC6A11 power conversion module and a SWH15 power conversion module; The EC6A11 power conversion module is used to convert the DC27V voltage into ±5V voltage; The SWH15 power conversion module is used to convert the DC27V voltage into ±15V voltage.

6. The automatic detection device for an I / F circuit according to claim 5, characterized in that: The core control chip is a 32-bit floating-point DSP, model TMS320F28335DSP.

7. The automatic detection device for an I / F circuit according to claim 6, characterized in that: The box structure of the measurement and control box is a 4U chassis, and a power switch, a voltage meter, an ammeter, an indicator light, a band switch and a test hole are arranged on the front panel of the box structure; a 220VAC three-core power single-phase socket, a product interface, a constant current source input interface, and a human-computer interaction display interface are arranged on the rear panel of the box structure; The power switch, the current meter and the test hole are respectively connected to the AC / DC power supply, the voltage meter is respectively connected to the AC / DC power supply and the secondary power supply module through a band switch, and the indicator light is connected to the core control chip; The 220VAC three-core power single-phase socket is connected to the AC / DC power supply, the product interface is connected to the I / F circuit to be tested through a test cable, the constant current source input interface is connected to the core control chip, and the human-computer interaction interface is connected to the embedded industrial computer.

8. An automatic detection method for an I / F circuit, characterized in that: The detection device according to any one of claims 1 to 7 comprises the following steps: The AC / DC power supply converts the AC220V voltage to DC27V voltage to supply power to the embedded industrial computer and the measurement and control board respectively; Convert the DC27V voltage entering the measurement and control board into 5V and ±15V voltages to power the core control chip and I / F circuit respectively; Based on the 1-way GPIO of the measurement and control board, the I / F circuit to be tested is powered on and the reference frequency standard is output; The measurement and control board controls the constant current source to output multiple groups of stable currents according to the test requirements. The I / F circuit outputs different pulse quantities based on different stable currents. The reversible counting of the pulse signal is completed through the reversible counter and transmitted to the embedded industrial computer through the CAN interface for calculation, completing the accuracy calculation of each channel of the I / F circuit.

9. The automatic detection method of an I / F circuit according to claim 8, characterized in that: After completing the accuracy calculation of each channel of the I / F circuit, the original data and accuracy calculation results of the I / F circuit are saved and a test data file is generated for users to view and troubleshoot.

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