CN103616632B - Photoelectric switching circuit test fixture and method of testing - Google Patents

Abstract

A photoelectric conversion circuit test tool and test method, including: single-chip microcomputer, RS-232 serial port communication module, JTAG simulation interface module, button control module, LED/LCD display module, power supply module, photoelectric conversion module, upper computer; after power on , the MCU sends a Fault signal through the GPIO unit to test the Fault signal conversion circuit of the photoelectric conversion board; the MCU sends a PWM signal through the PWM unit to test the PWM signal conversion circuit of the photoelectric conversion board; the MCU sends a PWM analog temperature signal through the PWM unit to test the temperature frequency conversion voltage of the photoelectric conversion board circuit; the single-chip microcomputer transmits the test result to the display module through the GPIO unit, and displays the test result; the present invention simplifies the test method of the photoelectric conversion circuit. Great time savings.

Description

Photoelectric conversion circuit test tool and test method

technical field

The invention belongs to the field of optoelectronic technology, and in particular relates to a photoelectric conversion circuit testing tool and testing method.

Background technique

Photoelectric technology is a high-tech that combines traditional optical technology with modern electronic technology and computer technology. With the continuous development and application of photoelectric conversion technology, photoelectric conversion technology is playing an increasingly important role in people's daily life. Since the discovery of the photoelectric effect, photoelectric conversion devices have been developed by leaps and bounds. At present, various photoelectric conversion technologies have been widely used in various industries, but the testing of photoelectric conversion circuits is more troublesome. The existing testing methods are relatively cumbersome, and uncertain factors such as human beings will be introduced in the testing process, which increases the difficulty of testing and reduces the accuracy of data.

Contents of the invention

In order to solve the above-mentioned defects in the prior art, the present invention provides a photoelectric conversion circuit testing tool and testing method, which are mainly used in the testing of photoelectric conversion boards.

To achieve the above object, the technical scheme of the present invention is as follows:

A photoelectric conversion circuit testing tool, comprising: a single-chip microcomputer, an RS-232 serial communication module, a JTAG simulation interface module, a button control module, an LED/LCD display module, a power supply module, a photoelectric conversion module, and a host computer;

Described power supply module is connected with single-chip microcomputer, RS-232 serial port communication module, JTAG emulation interface module, button control module, LED/LCD display module, photoelectric conversion module;

The RS-232 serial port communication module is connected with the single-chip microcomputer and the host computer respectively;

Described JTAG emulation interface module is connected with single-chip microcomputer and host computer respectively;

The key control module, LED/LCD display module and photoelectric conversion module are all connected with the single chip microcomputer.

A test method for a photoelectric conversion circuit is to use the above-mentioned tooling for testing, and the steps are as follows:

a. After power on, the microcontroller sends out a Fault signal through the GPIO unit, which is converted into an optical signal by the photoelectric conversion module and used as the input of the Fault signal conversion circuit of the photoelectric conversion board. The Fault signal conversion circuit converts the optical signal into an electrical signal and inputs it to In the single-chip microcomputer, after being processed by the processing unit of the single-chip microcomputer, the result is recorded;

b. The single-chip microcomputer sends a PWM signal through the PWM unit, which is used as the input of the PWM signal conversion circuit of the photoelectric conversion board. The PWM signal conversion circuit converts the electrical signal into an optical signal, inputs it into the optical fiber transceiver, and converts the electrical signal into the single-chip microcomputer through the optical fiber transceiver. , after being processed by the processing unit of the single-chip microcomputer, the result is recorded;

c. The single-chip microcomputer sends a PWM analog temperature signal through the PWM unit, and the signal can adjust the output frequency through the button control module, which is used as the input of the temperature-frequency-to-voltage circuit of the photoelectric conversion board, and the single-chip microcomputer receives the feedback electrical signal output by the temperature-frequency-to-voltage circuit of the photoelectric conversion board , after the electrical signal enters the single-chip microcomputer, after being processed by the single-chip A/D unit and the processing unit, the result is recorded;

d. The single-chip microcomputer transmits the test results to the display module through the GPIO unit, and displays the test results;

The photoelectric conversion board includes 7 groups of identical photoelectric conversion circuits, and each group of photoelectric conversion circuits includes a temperature-frequency conversion circuit, a PWM signal conversion circuit and a Fault signal conversion circuit.

The single-chip microcomputer adopts STM32, the RS-232 adopts MAX3232, the power chip adopts TEN3 and LM1117, the optical fiber transceiver adopts HFBR1521 and HFBR2521, and the LED/LCD display module adopts LCD1602.

The beneficial effect of the present invention is that: the present invention simplifies the testing method of the photoelectric conversion circuit. After the circuit is connected, it is only necessary to toggle the power switch to power on to judge whether there is an abnormality in the circuit, which greatly saves time; Eliminates the human factor and increases the accuracy of the test.

Description of drawings

The present invention has 6 accompanying drawings.

Fig. 1 is a kind of photoelectric conversion circuit test equipment and test method block diagram;

Fig. 2 is the work flowchart of single-chip microcomputer among the present invention;

Fig. 3 is the software working block diagram of the specific embodiment in the present invention;

Figure 4 is a schematic diagram of the power module;

5 is a schematic diagram of the photoelectric conversion module circuit;

Fig. 6 is a schematic diagram of the generation of each optical signal.

detailed description

Below in conjunction with this embodiment the present invention is further described:

A photoelectric conversion circuit testing tool, comprising: a single-chip microcomputer, an RS-232 serial communication module, a JTAG simulation interface module, a button control module, an LED/LCD display module, a power supply module, a photoelectric conversion module, and a host computer;

Described power supply module is connected with single-chip microcomputer, RS-232 serial port communication module, JTAG emulation interface module, button control module, LED/LCD display module, photoelectric conversion module;

The RS-232 serial port communication module is connected with the single-chip microcomputer and the host computer respectively;

Described JTAG emulation interface module is connected with single-chip microcomputer and host computer respectively;

The key control module, LED/LCD display module and photoelectric conversion module are all connected with the single-chip microcomputer.

A test method for a photoelectric conversion circuit is to use the above-mentioned tooling for testing, and the steps are as follows:

a. After power on, the microcontroller sends out a Fault signal through the GPIO unit, which is converted into an optical signal by the photoelectric conversion module and used as the input of the Fault signal conversion circuit of the photoelectric conversion board. The Fault signal conversion circuit converts the optical signal into an electrical signal and inputs it to In the single-chip microcomputer, after being processed by the processing unit of the single-chip microcomputer, the result is recorded;

b. The single-chip microcomputer sends a PWM signal through the PWM unit, which is used as the input of the PWM signal conversion circuit of the photoelectric conversion board. The PWM signal conversion circuit converts the electrical signal into an optical signal, inputs it into the optical fiber transceiver, and converts the electrical signal into the single-chip microcomputer through the optical fiber transceiver. , after being processed by the processing unit of the single-chip microcomputer, the result is recorded;

c. The single-chip microcomputer sends a PWM analog temperature signal through the PWM unit, and the signal can adjust the output frequency through the button control module, which is used as the input of the temperature-frequency-to-voltage circuit of the photoelectric conversion board, and the single-chip microcomputer receives the feedback electrical signal output by the temperature-frequency-to-voltage circuit of the photoelectric conversion board , after the electrical signal enters the single-chip microcomputer, after being processed by the single-chip A/D unit and the processing unit, the result is recorded;

d. The single-chip microcomputer transmits the test results to the display module through the GPIO unit, and displays the test results;

The photoelectric conversion board includes 7 groups of identical photoelectric conversion circuits, each group of photoelectric conversion circuits includes a temperature-frequency conversion circuit, a PWM signal conversion circuit and a Fault signal conversion circuit, and there are two PWM signal conversion circuits.

The single-chip microcomputer adopts STM32, the RS-232 adopts MAX3232, the power chip adopts TEN3 and LM1117, the optical fiber transceiver adopts HFBR1521 and HFBR2521, and the LED/LCD display module adopts LCD1602.

When in use, flip the power switch to power on, and judge whether the circuit is abnormal by displaying the results.

The steps to run the software are:

1. Initialization: LED and PWM signal IO initialization, Fault signal IO initialization, temperature signal IO initialization, DMA, ADC initialization;

2. Fault signal test: the single chip microcomputer sends a fault signal, receives and judges whether the 7 groups of fault feedback signals in the photoelectric conversion board are qualified, and records the result;

3. PWM signal test: The microcontroller sends out PWM signals, receives and judges whether the PWM feedback signals in the photoelectric conversion board are qualified, records the results, and tests 14 sets of PWM signals in total.

4. PWM analog temperature signal test: The microcontroller sends out PWM analog temperature signals, receives and judges whether the PWM analog temperature feedback signals in the photoelectric conversion board are within the set range, records the results, and tests 7 groups of temperature signals.

The test result is displayed with the LED on and off: on means qualified, off means unqualified.

Claims (1)

1. a photoelectric switching circuit test fixture, is characterized in that comprising: single-chip microcomputer, RS-232

Serial communication module, JTAG simulation interface module, key control module, LED/LCD display module, power module, lightElectricity modular converter, host computer;

Described power module and single-chip microcomputer, RS-232 serial communication module, JTAG simulation interface module, by key control mouldPiece, LED/LCD display module, photoelectric conversion module connect;

Described RS-232 serial communication module is connected with single-chip microcomputer and host computer respectively;

Described JTAG simulation interface module is connected with single-chip microcomputer and host computer respectively;

Described key control module, LED/LCD display module, photoelectric conversion module are all connected with single-chip microcomputer;

Test by above-mentioned frock, step is as follows:

A, power on after, single-chip microcomputer sends Fault signal by GPIO unit, this signal converts light to by photoelectric conversion moduleSignal, as the input of photoelectric conversion plate Fault signaling conversion circuit, Fault signaling conversion circuit is converted to optical signalThe signal of telecommunication, inputs in single-chip microcomputer, after the processing unit processes of single-chip microcomputer, outcome record is got off;

B, single-chip microcomputer send pwm signal by PWM unit, as the input of photoelectric conversion plate pwm signal change-over circuit, PWMSignaling conversion circuit converts electrical signals to optical signal, inputs in fiber optical transceiver, is converted to telecommunications through fiber optical transceiverNumber enter single-chip microcomputer, after single-chip microcomputer processing unit processes, outcome record is got off;

C, single-chip microcomputer send PWM analog temperature signal by PWM unit, and this signal can pass through key control module regulation outputFrequency, turns the input of potential circuit as photoelectric conversion plate temperature frequency, single-chip microcomputer receives photoelectric conversion plate temperature frequency and turns electricityThe feedback signal of telecommunication of volt circuit output, the signal of telecommunication enters after single-chip microcomputer, after Chip Microcomputer A/D unit, processing unit processes,Outcome record is got off;

D, single-chip microcomputer send test result to display module by GPIO unit, show test results; Described opto-electronic conversionPlate comprises 7 groups of identical photoelectric switching circuits, and every group of photoelectric switching circuit comprises that temperature frequency turns potential circuit, pwm signalChange-over circuit and Fault signaling conversion circuit.