CN112614452B - LabVIEW-based display screen stability testing method, device and storage medium - Google Patents
LabVIEW-based display screen stability testing method, device and storage medium Download PDFInfo
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- CN112614452B CN112614452B CN202011567682.6A CN202011567682A CN112614452B CN 112614452 B CN112614452 B CN 112614452B CN 202011567682 A CN202011567682 A CN 202011567682A CN 112614452 B CN112614452 B CN 112614452B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Abstract
The invention relates to the technical field of display screen testing, and provides a LabVIEW-based display screen stability testing method, labVIEW-based display screen stability testing equipment and a LabVIEW-based display screen stability testing storage medium. The upper computer is controlled to generate corresponding test instructions according to the test time sequence and the waveform of each time sequence independent pulse of the standard test pulse in sequence, and the corresponding test instructions are stored in the memory, and the upper computer is waited to output the trigger instruction to trigger the chrysanthemum water power supply to control the chrysanthemum water power supply to output the independent test pulse to drive the equipment to be tested; and finally, the image acquisition device acquires images and uploads the images to the upper computer, and data analysis is performed according to a preset display template to obtain the equipment performance of the equipment to be tested, so that the testing logic is tight, the testing efficiency is high, and the fault detection precision is greatly improved.
Description
Technical Field
The invention relates to the technical field of display screen testing, in particular to a LabVIEW-based display screen stability testing method, labVIEW-based display screen stability testing equipment and a LabVIEW-based storage medium.
Background
In the use process of the vehicle, due to the influence of factors such as system load or generator running conditions, the voltage output by the vehicle electrical system is unstable, so that the vehicle-mounted display screen needs high-precision power supply equipment to simulate the real vehicle environment, and pressure tests of various electrical performances are carried out to verify the reliability of the product.
The display screen has a certain working voltage range, when the detected input voltage is at an abnormal value, corresponding screen closing operation is performed, and when the detected input voltage is recovered to a normal voltage, corresponding screen opening operation is performed. In order to avoid the phenomenon of unstable display screen state caused by voltage jitter, software is added with a relevant filtering mechanism. Verifying the reliability of the display for this mechanism requires the execution of a time-type reset pulse, as shown in fig. 1, with the duration of the fault (undervoltage/power down) increasing gradually and recovering from each fault (voltage recovery to) Post-detection of whether the display screen can be restored toIn the normal working state, the device is in a normal working state,is the lower limit value of the normal working voltage of the display screen.
The existing display screen stability test method comprises the following steps: the SCPI language is used for carrying out single-step operation on the chrysanthemum water power, namely voltage and waiting time are set independently, and the working state of the display screen can be detected after the fault is recovered.
But has the following technical problems:
1. the chrysanthemum water has a certain response time to the instruction, which leads to inaccurate fault injection time and cannot meet the time requirement.
2. The reset pulse is split into independent waveforms, the independent waveforms are stored in a nonvolatile memory, and the waveforms are respectively triggered to operate, so that faults can be accurately injected, but the storage space of the power supply device is limited, and therefore, waveform information cannot be stored in the storage area entirely.
Disclosure of Invention
The invention provides a LabVIEW-based display screen stability testing method, labVIEW-based display screen stability testing equipment and a storage medium, and solves the technical problems of low detection precision, poor accuracy and low sensitivity of the existing display screen stability testing method.
In order to solve the technical problems, the invention provides a LabVIEW-based display screen stability testing method, which comprises the following steps:
s1, acquiring a test command and generating a test instruction according to preset test logic;
s2, inputting the independent test pulse to the equipment to be tested according to the test instruction;
s3, acquiring images of the equipment to be tested, and acquiring corresponding test data;
s4, analyzing the equipment performance of the equipment to be tested by integrating the test data, and outputting a corresponding test report.
The basic scheme is provided with the preset test logic, independent test pulses are input to the equipment to be tested, image acquisition is carried out on the equipment to be tested, corresponding test data are obtained to analyze the equipment performance of the equipment to be tested, so that the test state of the equipment to be tested when each independent test pulse is executed can be accurately monitored, the accurate injection of the fault time is realized, the configuration of a test system is automatic, the labor and time can be further saved, the test efficiency is improved, and the fault problem of the equipment to be tested can be found as soon as possible.
In a further embodiment, the step S1 includes:
s11, the upper computer sequentially generates corresponding test commands according to the time sequence by referring to waveforms of each time sequence independent pulse in the standard test pulses and outputs the corresponding test commands to the program writer;
s12, the program writer responds to the test command and outputs a corresponding test instruction.
In a further embodiment, the step S2 includes:
s21, inputting the test instruction into a memory of the chrysanthemum water power supply.
And S22, triggering the chrysanthemum water power supply to output corresponding independent test pulses to drive the equipment to be tested after the upper computer sends a trigger instruction.
The scheme takes time sequence as a limit, and refers to the waveform of each time sequence independent pulse of the standard test pulse, and corresponding test instructions are sequentially generated and output to the chrysanthemum water power supply to control the output of the corresponding independent test pulse, so that the equipment to be tested is driven, and image display is carried out according to video test data, so that the generation and recovery time of each fault can be accurately determined through the triggering time of each independent test pulse.
In a further embodiment, the step S3 includes:
s31, acquiring a test image of the equipment to be tested by adopting an image acquisition device;
s32, identifying the test image to acquire corresponding image data.
In a further embodiment, the step S4 includes: comparing the image data according to a preset display template, if the comparison is consistent, entering a test of the next independent test pulse, and outputting a test report of the current test; if the comparison is inconsistent, interrupting the test, integrating the test image and the image data, and outputting a test report of current test abnormality.
According to the scheme, the image acquisition equipment is adopted, the working state of the equipment to be tested under the driving of independent test pulses is obtained, a test image capable of directly reflecting the working state of the equipment to be tested is obtained, corresponding image data obtained after identification processing is compared with a preset display template, whether the equipment to be tested is in an abnormal working state currently can be judged in a short time, after the existence of faults is further determined, the current test process is suspended, and the equipment to be tested is convenient for test personnel to record and repair, so that the burden of the fault storage equipment is reduced, the running rate of the test equipment is improved, and the test efficiency of the test equipment is further improved.
In a further embodiment, in said step S12: the program writer writes the test instructions using an SCPI programming language.
According to the scheme, the program writer is adopted, the SCPI programming language is used as a standard for writing the test instruction, remote control of the water and the electricity of the chrysanthemum can be achieved, and therefore the water and the electricity of the chrysanthemum is controlled to accurately drive the equipment to be tested according to preset test logic.
In a further embodiment, before said step S1, further comprising: s0, transmitting video test data to the equipment to be tested, and displaying images; and a standard test pulse is acquired.
The invention also provides a LabVIEW-based display screen stability test device, which is applied to the LabVIEW-based display screen stability test method and comprises an upper computer, a chrysanthemum water power supply, a test host and an image acquisition device, wherein the chrysanthemum water power supply, the test host and the image acquisition device are connected with the upper computer;
the upper computer is used for generating a test instruction according to the standard test pulse;
the chrysanthemum water power supply is used for responding to the test instruction to generate corresponding independent test pulse and driving equipment to be tested;
the test host is used for transmitting video test data to the equipment to be tested and displaying images;
the image acquisition device is used for acquiring a test image when the equipment to be tested displays the image;
the upper computer is also used for analyzing the equipment performance of the equipment to be tested according to a preset display template and the test image and outputting a test report.
The basic scheme is based on the upper computer, the chrysanthemum water power supply, the testing host and the image acquisition device which are connected with the upper computer, a display screen stability testing mechanism is established, and the testing host is controlled to output video testing data to be tested by adopting the stability testing method so as to display images. The upper computer is controlled to generate corresponding test instructions according to the test time sequence and the waveform of each time sequence independent pulse of the standard test pulse in sequence, and the corresponding test instructions are stored in the memory, and the upper computer is waited to output the trigger instruction to trigger the chrysanthemum water power supply to control the chrysanthemum water power supply to output the independent test pulse to drive the equipment to be tested; and finally, the image acquisition device acquires images and uploads the images to the upper computer, and data analysis is performed according to a preset display template to obtain the equipment performance of the equipment to be tested, so that the testing logic is tight, the testing efficiency is high, and the fault detection precision is greatly improved.
In a further embodiment, the device to be tested is a vehicle-mounted display screen;
the image acquisition device is an industrial camera.
The invention also provides a storage medium, on which a computer program is stored, the computer program is used for being loaded by the LabVIEW-based display screen stability testing device so as to realize the LabVIEW-based display screen stability testing method. The storage medium may be a magnetic disk, an optical disk, a Read Only Memory (ROM), a random access memory (Random Access Memory, RAM), or the like.
Drawings
FIG. 1 is a schematic waveform diagram of a test pulse according to an embodiment of the present invention;
FIG. 2 is a workflow diagram of a LabVIEW-based display screen stability testing method provided by an embodiment of the invention;
FIG. 3 is a schematic diagram illustrating the splitting of the individual test pulses in step S2 according to an embodiment of the present invention;
fig. 4 is a system frame diagram of a display screen stability test system based on LabVIEW according to an embodiment of the present invention.
Detailed Description
The following examples are given for the purpose of illustration only and are not to be construed as limiting the invention, including the drawings for reference and description only, and are not to be construed as limiting the scope of the invention as many variations thereof are possible without departing from the spirit and scope of the invention.
Example 1
The method for testing the stability of the display screen based on LabVIEW provided by the embodiment of the invention, as shown in FIG. 2, comprises the following steps S0-S4:
s0, transmitting video test data to equipment to be tested, and displaying images; and a standard test pulse is acquired.
S1, acquiring a test command and generating a test command according to preset test logic, referring to FIG. 3, specifically comprising the steps S11-S12:
s11, the upper computer sequentially generates corresponding test commands according to the time sequence and referring to waveforms of each time sequence independent pulse in the standard test pulses, and outputs the corresponding test commands to the program writer;
s12, the program writer responds to the test command and outputs a corresponding test instruction.
Wherein, the programming writer adopts SCPI programming language to write the test instruction.
The embodiment adopts a program writer, writes test instructions by taking the SCPI programming language as a standard, and can realize remote control of the water and the electricity of the chrysanthemum, thereby controlling the water and the electricity of the chrysanthemum to accurately drive the equipment to be tested.
S2, inputting independent test pulses to equipment to be tested according to a test instruction, and specifically comprising the steps of S21-S22: :
s21, inputting a test instruction into the chrysanthemum water power storage.
And S22, after the upper computer sends a trigger instruction, triggering the chrysanthemum water to supply power to output corresponding independent test pulses to drive the equipment to be tested.
In this embodiment, the time sequence is taken as a limitation, and the waveform of each time sequence independent pulse of the standard test pulse is referred to, so that the corresponding test instruction is sequentially generated and output to the chrysanthemum water power supply to control the output of the corresponding independent test pulse, so as to drive the equipment to be tested, and perform image display according to the video test data, thus, the trigger time of each independent test pulse can accurately determine the generation and recovery time of each fault.
S3, performing image acquisition on equipment to be tested to acquire corresponding test data, wherein the method specifically comprises the steps S31-S32:
s31, acquiring a test image of equipment to be tested by adopting an image acquisition device;
s32, identifying the test image to acquire corresponding image data.
S4, analyzing the equipment performance of the equipment to be tested by integrating the test data, and outputting a corresponding test report, wherein the method specifically comprises the following steps:
comparing the image data according to a preset display template, if the comparison is consistent, entering a test of the next independent test pulse, and outputting a test report of the current independent test pulse for testing normally; if the comparison is inconsistent, interrupting the test, integrating the test image and the image data, and outputting a test report of abnormal test of the current independent test pulse.
The preset display template is a normal picture output by the equipment to be tested in a normal working state. A database may be created based on the video test data to store a preset display template corresponding to each test instruction (corresponding to the waveform of the independent pulse).
According to the embodiment, the image acquisition equipment is adopted, the working state of the equipment to be tested under the drive of the independent test pulse is obtained, the test image capable of directly reflecting the working state of the equipment to be tested is obtained, the corresponding image data obtained after identification processing is compared with the preset display template, whether the equipment to be tested is in the abnormal working state currently can be judged in a short time, after the existence of faults is further determined, the current test process is suspended, and the equipment to be tested is convenient for test personnel to record and repair, so that the burden of the fault storage equipment is reduced, the running speed of the test equipment is improved, and the test efficiency of the test equipment is further improved.
According to the embodiment of the invention, the preset test logic is set, the independent test pulse is input to the equipment to be tested, the image acquisition is carried out on the equipment to be tested, the equipment performance of the corresponding test data analysis equipment to be tested is obtained, so that the test state of the equipment to be tested for executing each independent test pulse can be accurately monitored, the accurate detection of the fault injection time is realized, the configuration of the test system is automatic, the labor and time can be further saved, the test efficiency is improved, and the fault problem of the equipment to be tested can be found as soon as possible.
Example 2
Reference numerals in the drawings of the specification in this embodiment include: the upper computer 1, the chrysanthemum water power supply 2, the test host 3, the image acquisition device 4 and the equipment to be tested 5.
The embodiment of the invention also provides a LabVIEW-based display screen stability test device, which is applied to the LabVIEW-based display screen stability test method of the embodiment 1, and is shown in FIG. 4, and comprises an upper computer 1, a chrysanthemum water power supply 2, a test host 3 and an image acquisition device 4, wherein the chrysanthemum water power supply 2, the test host 3 and the image acquisition device are connected with the upper computer;
the upper computer 1 is used for generating a test instruction according to standard test pulses, wherein the upper computer 1 is built in a LabVIEW development environment, and outputs the test instruction to the chrysanthemum water power supply 2 through an RS232C configuration interface; the command data is transmitted to the image pickup device 4 through the USB interface.
The chrysanthemum water power supply 2 is used for responding to the test instruction to generate corresponding independent test pulse and driving the equipment to be tested 5;
the test host 3 transmits video test data to the driven equipment 5 to be tested through the LVDS wire harness to display images;
the image acquisition device 4 is used for acquiring a test image when the device to be tested 5 displays the image;
the upper computer 1 is further configured to analyze the device performance of the device to be tested 5 according to a preset display template and a test image, and output a test report.
In this embodiment, the device to be tested 5 is a vehicle-mounted display screen;
the image acquisition device 4 is an industrial camera.
Referring to fig. 3 in combination with embodiment 1, the working principle of the display screen stability testing device provided in this embodiment is as follows:
with reference to the standard test pulses, according to the time sequence, the upper computer 1 sequentially intercepts waveforms of each time sequence independent pulse in the standard test pulses as a standard, outputs corresponding test commands and outputs the corresponding test commands to the program writer.
At this time, the program writer writes the test instruction in the SCPI programming language in response to the test command, and outputs it to the memory of the chrysanthemum water power supply 2. After the upper computer sends a trigger instruction, the chrysanthemum water power supply 2 is controlled to output corresponding independent test pulses to the equipment 5 to be tested (vehicle-mounted display screen) according to the test instruction, and the equipment 5 to be tested is driven.
At the beginning of the equipment work, the upper computer 1 issues a display instruction to the test host 3 to control the test host 3 to transmit video test data to the equipment to be tested 5, so that the image display can be performed after the equipment to be tested 5 is powered on. At this time, the upper computer 1 also controls the image acquisition device 4 to acquire and upload the test image of the device 5 to be tested.
Then, the upper computer 1 firstly carries out certain image processing (such as image binarization, graying and the like) on the test image, then compares the test image according to a preset display template, if the comparison is consistent, then enters the test of the next independent test pulse (namely the waveform of the next time sequence independent pulse) and outputs a test report of the current test normal; if the comparison is inconsistent, interrupting the test, integrating the test image and the image data, and outputting a test report of the current test abnormality.
The output of the test report can also be accompanied with the triggering of an alarm signal to prompt the staff to process.
After the current failure is recovered, the test of the next independent test pulse can be re-entered. The test of the whole video test data (reset pulse) can be completed by the cyclic reciprocation.
The embodiment of the invention establishes a display screen stability test mechanism based on the upper computer 1, the chrysanthemum water power supply 2, the test host 3 and the image acquisition device 4 which are connected with the upper computer, and the upper computer 1 controls the test host 3 to output video test data to be tested by adopting the stability test method so as to display images. The upper computer 1 is controlled to sequentially generate corresponding test instructions according to the test time sequence and the waveforms of the independent pulses of each time sequence of the standard test pulses, and the corresponding test instructions are stored in the memory, and the upper computer 1 is waited to output a trigger instruction to trigger the chrysanthemum water power supply 2 to drive the equipment 5 to be tested; and finally, the image acquisition device 4 acquires images and uploads the images to the upper computer 1, and data analysis is performed according to a preset display template to obtain the equipment performance of the equipment 5 to be tested, so that the testing logic is tight, the testing efficiency is high, and the fault detection precision is greatly improved.
Example 3
The embodiment of the invention also provides a storage medium, on which a computer program is stored, wherein the computer program is used for being loaded by the display screen stability testing device based on LabVIEW in the embodiment 2 so as to realize the display screen stability testing method based on LabVIEW in the embodiment 1. The storage medium may be a magnetic disk, an optical disk, a Read Only Memory (ROM), a random access memory (Random Access Memory, RAM), or the like.
The above examples are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present invention should be made in the equivalent manner, and the embodiments are included in the protection scope of the present invention.
Claims (6)
1. A display screen stability testing method based on LabVIEW is characterized by comprising the following steps:
s1, acquiring a test command and generating a test instruction according to preset test logic;
s2, inputting corresponding independent test pulses to the equipment to be tested according to the test instruction;
s3, acquiring images of the equipment to be tested, and acquiring corresponding test data;
s4, analyzing the equipment performance of the equipment to be tested by integrating the test data, and outputting a corresponding test report;
the step S1 includes:
s11, the upper computer sequentially generates corresponding test commands according to the time sequence and referring to waveforms of each time sequence independent pulse in the standard test pulses, and outputs the corresponding test commands to the program writer;
s12, the program writer responds to the test command to output a corresponding test instruction;
the step S2 includes:
s21, inputting the test instruction into a memory of the chrysanthemum water power supply;
s22, after the upper computer sends a trigger instruction, triggering the chrysanthemum water to generate corresponding independent test pulses to drive the equipment to be tested;
the step S3 includes:
s31, acquiring a test image of the equipment to be tested by adopting an image acquisition device;
s32, identifying the test image to acquire corresponding image data;
the step S4 includes: comparing the image data according to a preset display template, if the comparison is consistent, entering a test of the next independent test pulse, and outputting a test report of the current test; if the comparison is inconsistent, interrupting the test, integrating the test image and the image data, and outputting a test report of current test abnormality.
2. The method for testing the stability of a display screen based on LabVIEW according to claim 1, wherein in said step S12: the program writer writes the test instructions using an SCPI programming language.
3. The method for testing the stability of a display screen based on LabVIEW according to claim 1, further comprising, before said step S1: s0, transmitting video test data to the equipment to be tested, and displaying images; and a standard test pulse is acquired.
4. A display screen stability test device based on LabVIEW, which is applied to the display screen stability test method based on LabVIEW as set forth in any one of claims 1-3, and is characterized in that: the device comprises an upper computer, a chrysanthemum water power supply, a test host and an image acquisition device, wherein the chrysanthemum water power supply, the test host and the image acquisition device are connected with the upper computer;
the upper computer is used for generating a test instruction according to the standard test pulse;
the chrysanthemum water power supply is used for responding to the test instruction to generate corresponding independent test pulse and driving equipment to be tested;
the test host is used for transmitting video test data to the equipment to be tested and displaying images;
the image acquisition device is used for acquiring a test image when the equipment to be tested displays the image;
the upper computer is also used for analyzing the equipment performance of the equipment to be tested according to a preset display template and the test image and outputting a test report.
5. The LabVIEW-based display screen stability testing apparatus according to claim 4, wherein:
the equipment to be tested is a vehicle-mounted display screen;
the image acquisition device is an industrial camera.
6. A storage medium having a computer program stored thereon, characterized by: the computer program is used for being loaded by the display screen stability testing device based on LabVIEW according to any one of claims 4-5 to realize the display screen stability testing method based on LabVIEW according to any one of claims 1-3.
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