A dynamic current timing detection device and detection method for vehicle lights based on a high-speed acquisition board

Abstract

The present invention relates to the field of automotive electronic automation detection engineering, and in particular to a vehicle lamp dynamic current timing detection device and detection method based on a high-speed acquisition board, comprising an industrial control computer (1), a programmable power supply (2), a digital input and output board (3), a high-speed current acquisition card (4), a high-speed voltage acquisition card (5), a relay module (6), a left lamp (7) and a right lamp (8), wherein the industrial control computer (1) is electrically connected to the left lamp (7) and the right lamp (8) respectively through the programmable power supply (2), the left lamp (7) and the right lamp (8) are electrically connected to the digital input and output board (3) respectively through the relay module (5), the digital input and output board (3) is also electrically connected to the industrial control computer (1), the high-speed current acquisition card (4) and the high-speed voltage acquisition card (5) are both electrically connected to the left lamp and the right lamp, and the high-speed current acquisition card (4) and the high-speed voltage acquisition card are also both electrically connected to the industrial control computer.

Description

Technical Field

[0001] The present invention relates to the field of automotive electronic automation detection engineering, and in particular to a vehicle lamp dynamic current timing detection device and a detection method based on a high-speed acquisition board. Background Art

[0002] The existing turn signal is not eye-catching enough, especially when driving for a long time. The driver cannot quickly make corresponding judgments and operations on the turn signal. The turn signal adds a dynamic water flow function to improve the safety during driving.

[0003] At the same time, the car has added a welcome light function, including multiple welcome modes and departure modes, to increase the user experience and pleasure.

[0004] According to the dynamic steering and welcoming function test requirements, the left and right lights need to greet guests at the same time, and the left and right timing error does not exceed plus or minus 2mS error. At the same time, the front and rear turn signals are required to dynamically turn at the same time, and the left and right timing error does not exceed plus or minus 2mS error.

[0005] Conventional detection equipment can only meet the requirements of static current and voltage signal detection, but cannot meet the requirements of judging every dynamic process. Summary of the invention

[0006] The technical problem to be solved by the present invention is to overcome the existing defects and provide a vehicle lamp dynamic current timing detection device and detection method based on a high-speed acquisition board, which can detect dynamic current signals and automatically output vehicle lamp dynamic current timing results.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a dynamic current timing detection device for vehicle lights based on a high-speed acquisition board, comprising an industrial computer, a programmable power supply, a digital input and output board, a high-speed current acquisition card, a high-speed voltage acquisition card, a relay module, a left lamp and a right lamp, wherein the industrial computer is electrically connected to the left lamp and the right lamp respectively through the programmable power supply, the left lamp and the right lamp are electrically connected to the digital input and output board respectively through the relay module, the digital input and output board is also electrically connected to the industrial computer, the high-speed current acquisition card and the high-speed voltage acquisition card are both electrically connected to the left lamp and the right lamp, and the high-speed current acquisition card and the high-speed voltage acquisition card are also electrically connected to the industrial computer.

[0008] Preferably, the high-speed current acquisition board adopts a 4-channel parallel high-speed current acquisition board of model NI 9227, and the sampling rate is 50KHZ-10MHZ.

[0009] Preferably, the high-speed voltage acquisition card adopts NI 9221, which is an 8-channel parallel high-speed voltage acquisition board with a sampling rate of 10KHZ-10MHZ.

[0010] Preferably, the digital input and output board adopts the model of NI 9375 and is connected to the industrial computer via a USB bus.

[0011] Preferably, the high-speed voltage acquisition card has 16-channel digital input signal and 16-channel digital output signal modules, both of which are electrically connected to the left and right lights through the relay module R8T-PS-G6B.

[0012] Preferably, the relay module adopts model R8T-PS-G6B and is electrically connected to the digital input and output board through an IO signal line.

[0013] In order to solve the above technical problems, the present invention provides the following technical solutions: a detection method of a dynamic current timing detection device for a vehicle lamp, comprising the following steps: the first step: the dynamic steering function of the left lamp and the right lamp is turned on, the industrial computer controls the programmable power supply to output a 13.5V power supply voltage, the industrial computer controls the digital input and output board to output the first, second, third and fourth high-level signals, respectively supplying power to the left lamp and the right lamp, and the dynamic steering function of the left lamp and the right lamp is turned on;

[0014] Step 2: The industrial computer controls the high-speed current acquisition card to collect the current signals of the left and right lights during the dynamic turning process through communication instructions, and controls the high-speed voltage acquisition card to collect the voltage signals of the left and right lights during the dynamic turning process;

[0015] Step 3: Dynamic current timing processing, the industrial computer automatically calculates the starting time of the voltage signal through the rising edge signal calculation method, and calculates the starting time of the lamp lighting;

[0016] The industrial computer automatically calculates the time of each rising edge and falling edge of the current signal through the rising edge signal and falling edge signal algorithm; the industrial computer calculates the time period of each dynamic current step through the difference between the rising edge and the falling edge;

[0017] Based on the above-mentioned time period of the dynamic current step, the industrial computer finds out the current value corresponding to each step through a data search algorithm; the industrial computer automatically calculates the maximum current value, the minimum current value and the average current on each dynamic step through the algorithm;

[0018] Step 4: The industrial computer controls the dynamic current of the welcome function of the left and right lights to be turned on; the industrial computer controls the programmable power supply to output a 13.5V power supply voltage, and the industrial computer controls the digital input and output board to output the 6th, 7th, 8th, and 9th high-level signals to supply power to the left and right lights respectively, and the left and right lights turn on the welcome function;

[0019] Step 5: Repeat the above steps 2 and 3, and use the high-speed current acquisition card and the high-speed voltage acquisition card to acquire the high-speed voltage signal and high-speed current signal of the left and right lights when the welcome function is turned on;

[0020] Step 6: Compare the current step time, the maximum current value, the minimum current value, and the average current of each current step with the design value by comparing with the set parameters; automatically compare the left lamp test signal and test value with the right lamp test signal and test value, and automatically output the consistency difference value of the dynamic current timing of the left and right lamps;

[0021] Step 7: Determine the results; display and save the results.

[0022] Beneficial effects of the present invention: The dynamic current timing detection device and detection method of the headlight based on the high-speed acquisition board of the present invention can automatically calculate the starting time of the voltage signal and the lighting starting time of the lamp through the test software running on the industrial computer, through the rising edge signal calculation method of the voltage signal; the test software running on the industrial computer automatically calculates the time of each rising edge and falling edge of the current signal through the rising edge signal and the falling edge signal algorithm, and the test software running on the industrial computer calculates the time period of each dynamic current ladder through the difference between the rising edge and the falling edge. The test software running on the industrial computer finds the corresponding current value of each ladder through the data search algorithm based on the above calculated time period of the dynamic current ladder. The test software running on the industrial computer automatically calculates the maximum current value, the minimum current value, and the average current on each dynamic ladder through the algorithm; and compares the test results with the dynamic current timing design value of the headlight, and finally displays the test results and saves the results; the test software running on the industrial computer automatically compares the test results of the left and right headlights, and automatically outputs the consistency results of the dynamic current timing of the left and right headlights. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is the principle block diagram of the automatic detection device for dynamic current timing of vehicle lights based on a high-speed acquisition board;

[0024] Figure 2 It is a dynamic timing algorithm block diagram of the dynamic current timing automatic detection device of the headlight based on the high-speed acquisition board;

[0025] Figure 3 This is a flow chart of the automatic detection method of dynamic current timing of vehicle lights based on a high-speed acquisition board.

[0026] Description of the drawings: 1. Industrial computer, 2. Programmable power supply, 3. Digital input and output board, 4. High-speed current acquisition card, 5. High-speed voltage acquisition card, 6. Relay module, 7. Left light, 8. Right light. DETAILED DESCRIPTION

[0027] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0028] like Figure 1 As shown, the method and device for automatic detection of dynamic current timing of vehicle lights based on a high-speed acquisition board described in the present invention adopts a technical solution including a high-speed current acquisition board, a high-speed voltage acquisition board, an industrial computer, a programmable power supply, a digital input and output board, etc.

[0029] The high-speed current acquisition card and the high-speed voltage acquisition card are mainly used to simultaneously acquire the input current signal and input voltage signal of the left and right lamps, and automatically transmit the input current signal and voltage signal to the industrial computer. The test software on the industrial computer automatically calculates the start time, end time, and step current value of each dynamic step through the rising edge signal and falling edge signal algorithm, and then calculates the specific time of the dynamic step segment and the maximum current value, minimum current value, and average current value through the data search algorithm. The system automatically compares the test results of the left and right lamps, and automatically outputs the consistency results of the dynamic current timing of the left and right lamps.

[0030] The high-speed current acquisition board is connected to the industrial computer via a USB bus. The high-speed current acquisition board adopts the model NI 9227, which is a 4-channel parallel high-speed current acquisition board with a sampling rate of 50KHZ-10MHZ. The test current value is automatically recorded and saved in the industrial computer through the system software.

[0031] As an optimization solution of the present invention, the high-speed voltage acquisition board is connected to the industrial computer via a USB bus. The high-speed current acquisition board adopts the model NI 9221, which is an 8-channel parallel high-speed voltage acquisition board with a sampling rate of 10KHZ-10MHZ. The test voltage value is automatically recorded and saved in the industrial computer through the system software.

[0032] The digital input and output board adopts the model NI 9375 and is connected to the industrial computer through the USB bus. The digital input and output board is a 16-channel digital input signal and 16-channel digital output signal module, which controls the switch of the light power supply signal and the control signal through the relay module R8T-PS-G6B.

[0033] The relay module, model R8T-PS-G6B, is connected to the digital input and output board through the IO signal line.

[0034] like Figure 2As shown, when the detection device described in the present invention is used: first, the detection equipment is installed and prepared: the industrial computer is connected to the fiber optic colorimeter module through the 485 bus; secondly, the instrument and equipment are turned on: the programmable power supply, industrial computer and other equipment are turned on respectively, and the fiber optic colorimeter module parameters are configured; then, the test function: the threshold of each test item is set, and the relevant detection of the turn signal is started; finally, the data is saved: after all the detection items are fully detected, the detection results are saved in the database.

[0035] like Figure 2 and 3 As shown, a detection method of a dynamic current timing detection device for a vehicle lamp comprises the following steps: the first step: the dynamic steering function of the left lamp 7 and the right lamp 8 is turned on, the industrial computer 1 controls the programmable power supply 2 to output a 13.5V power supply voltage, the industrial computer 1 controls the digital input and output board 3 to output the first, second, third and fourth high-level signals, respectively supplying power to the left lamp 7 and the right lamp 8, and the left lamp 7 and the right lamp 8 turn on the dynamic steering function;

[0036] Step 2: The industrial computer 1 controls the high-speed current acquisition card 4 to acquire the current signals of the left lamp 7 and the right lamp 8 during the dynamic turning process through communication instructions, and controls the high-speed voltage acquisition card 5 to acquire the voltage signals of the left lamp 7 and the right lamp 8 during the dynamic turning process;

[0037] Step 3: Dynamic current timing processing, the industrial computer 1 automatically calculates the starting time of the voltage signal by using the rising edge signal calculation method, and calculates the starting time of the lamp lighting;

[0038] The industrial computer 1 automatically calculates the time of each rising edge and falling edge of the current signal through the rising edge signal and the falling edge signal algorithm; the industrial computer 1 calculates the time period of each dynamic current step through the difference between the rising edge and the falling edge;

[0039] Based on the above-mentioned calculated time period of the dynamic current step, the industrial computer 1 finds out the current value corresponding to each step through a data search algorithm; the industrial computer 1 automatically calculates the maximum current value, the minimum current value and the average current on each dynamic step through the algorithm;

[0040] Step 4: The industrial computer 1 controls the dynamic current of the welcome function of the left light 7 and the right light 8 to be turned on; the industrial computer 1 controls the programmable power supply 2 to output a 13.5V power supply voltage, and the industrial computer 1 controls the digital input and output board 3 to output the 6th, 7th, 8th and 9th high-level signals to supply power to the left light 7 and the right light 8 respectively, and the left light 7 and the right light 8 turn on the welcome function;

[0041] Step 5: Repeat the above steps 2 and 3, and collect the high-speed voltage signal and high-speed current signal of the left lamp 7 and the right lamp 8 when the welcome function is turned on through the high-speed current acquisition card 4 and the high-speed voltage acquisition card 5;

[0042] Step 6: Compare the above-mentioned current step time, the maximum current value, the minimum current value, and the average current of each step current with the design value by comparing with the set parameters; automatically compare the test signal and test value of the left lamp 7 with the test signal and test value of the right lamp 8, and automatically output the consistency difference value of the dynamic current timing of the left and right lamps;

[0043] Step 7: Determine the results; display and save the results.

[0044] The dynamic current timing detection device and detection method of the headlight based on the high-speed acquisition board of the present invention can automatically calculate the starting time of the voltage signal and the lighting starting time of the lamp through the test software running on the industrial computer through the rising edge signal calculation method; the test software running on the industrial computer automatically calculates the time of each rising edge and falling edge of the current signal through the rising edge signal and the falling edge signal algorithm, and the test software running on the industrial computer calculates the time period of each dynamic current ladder through the difference between the rising edge and the falling edge. The test software running on the industrial computer finds the corresponding current value of each ladder based on the above calculated time period of the dynamic current ladder through the data search algorithm. The test software running on the industrial computer automatically calculates the maximum current value, the minimum current value, and the average current on each dynamic ladder through the algorithm; and compares the test results with the dynamic current timing design value of the headlight, and finally displays the test results and saves the results; the test software running on the industrial computer automatically compares the test results of the left and right headlights, and automatically outputs the consistency results of the dynamic current timing of the left and right headlights.

[0045] The above are preferred implementation modes of the present invention. Those skilled in the art to which the present invention belongs can also change and modify the above implementation modes. Therefore, the present invention is not limited to the above specific implementation modes. Any obvious improvements, substitutions or modifications made by those skilled in the art on the basis of the present invention belong to the protection scope of the present invention.

Claims

1. A detection method for a dynamic current timing detection device for a vehicle lamp, characterized in that: The invention comprises an industrial control computer (1), a programmable power supply (2), a digital input / output board (3), a high-speed current acquisition card (4), a high-speed voltage acquisition card (5), a relay module (6), a left lamp (7) and a right lamp (8), wherein the industrial control computer (1) is electrically connected to the left lamp (7) and the right lamp (8) respectively through the programmable power supply (2), the left lamp (7) and the right lamp (8) are electrically connected to the digital input / output board (3) respectively through the relay module (6), the digital input / output board (3) is also electrically connected to the industrial control computer (1), the high-speed current acquisition card (4) and the high-speed voltage acquisition card (5) are both electrically connected to the left lamp (7) and the right lamp (8), and the high-speed current acquisition card (4) and the high-speed voltage acquisition card (5) are also electrically connected to the industrial control computer (1); The high-speed current acquisition card (4) adopts a 4-channel parallel high-speed current acquisition card of model NI 9227, and the sampling rate is 50KHZ-10MHZ; The high-speed voltage acquisition card (5) is a NI 9221 8-channel parallel high-speed voltage acquisition card with a sampling rate of 10KHZ-10MHZ; The digital input and output board (3) is of the model NI 9375 and is connected to the industrial computer (1) via a USB bus; The high-speed voltage acquisition card (5) is a 16-channel digital input signal and a 16-channel digital output signal module, both of which are electrically connected to the left lamp (7) and the right lamp (8) through the relay module R8T-PS-G6B; The relay module is of model R8T-PS-G6B and is electrically connected to the digital input and output board (3) via an IO signal line; The detection method comprises the following steps: the first step: the dynamic steering function of the left light (7) and the right light (8) is turned on, the industrial computer (1) controls the programmable power supply (2) to output a 13.5V power supply voltage, the industrial computer (1) controls the digital input and output board (3) to output the first, second, third and fourth high-level signals, respectively supplying power to the left light (7) and the right light (8), and the dynamic steering function of the left light (7) and the right light (8) is turned on; Step 2: The industrial computer (1) controls the high-speed current acquisition card (4) to acquire current signals of the left lamp (7) and the right lamp (8) during the dynamic steering process through communication instructions, and controls the high-speed voltage acquisition card (5) to acquire voltage signals of the left lamp (7) and the right lamp (8) during the dynamic steering process; Step 3: Dynamic current timing processing, the industrial computer (1) automatically calculates the start time of the voltage signal by using the rising edge signal calculation method to calculate the start time of the lamp lighting; The industrial computer (1) automatically calculates the time of each rising edge and falling edge of the current signal through a rising edge signal and a falling edge signal algorithm; the industrial computer (1) calculates the time period of each dynamic current step through the difference between the rising edge and the falling edge; The industrial control computer (1) finds out the current value corresponding to each step based on the time period of the dynamic current step calculated above through a data search algorithm; the industrial control computer (1) automatically calculates the maximum current value, the minimum current value and the average current on each dynamic step through the algorithm; Step 4: The industrial computer (1) controls the dynamic current of the welcoming function of the left light (7) and the right light (8) to be turned on; the industrial computer (1) controls the programmable power supply (2) to output a 13.5V power supply voltage, and the industrial computer (1) controls the digital input and output board (3) to output the 6th, 7th, 8th and 9th high-level signals to respectively supply power to the left light (7) and the right light (8), and the left light (7) and the right light (8) turn on the welcoming function; Step 5: Repeat the above steps 2 and 3, and collect the high-speed voltage signal and high-speed current signal of the left lamp (7) and the right lamp (8) when the welcome function is turned on through the high-speed current acquisition card (4) and the high-speed voltage acquisition card (5); The sixth step is to compare the above-mentioned each current step time, the maximum current value, the minimum current value, and the average current with the design value by comparing with the set parameters; the test signal and test value of the left lamp (7) are automatically compared with the test signal and test value of the right lamp (8), and the consistency difference value of the dynamic current timing of the left and right lamps is automatically output; Step 7: Determine the results; display and save the results.

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