CN112710456A - System and method for measuring headlamp visibility evaluation data - Google Patents
System and method for measuring headlamp visibility evaluation data Download PDFInfo
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- CN112710456A CN112710456A CN202011582787.9A CN202011582787A CN112710456A CN 112710456 A CN112710456 A CN 112710456A CN 202011582787 A CN202011582787 A CN 202011582787A CN 112710456 A CN112710456 A CN 112710456A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
- G01M11/06—Testing the alignment of vehicle headlight devices
- G01M11/064—Testing the alignment of vehicle headlight devices by using camera or other imaging system for the light analysis
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
- G01M11/06—Testing the alignment of vehicle headlight devices
- G01M11/064—Testing the alignment of vehicle headlight devices by using camera or other imaging system for the light analysis
- G01M11/065—Testing the alignment of vehicle headlight devices by using camera or other imaging system for the light analysis details about the image analysis
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/10—Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation
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- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention discloses a system for measuring headlamp visibility evaluation data, which comprises a wireless gateway, illumination intensity detectors and an industrial computer, wherein a test field is gridded, each grid point is selected as an illumination intensity test point, each test point is respectively provided with one illumination intensity detector, and each illumination intensity detector is communicated with the wireless gateway and is used for sending collected illumination intensity data to the wireless gateway and transmitting the illumination data to the industrial computer through the wireless gateway. The invention has the advantages that: the test is simple and quick, and the test result is reliable; the data of each point required by the light pattern can be quickly detected; after the detector and the test point are arranged, the device can be repeatedly used, and the test is quick and reliable.
Description
Technical Field
The invention relates to the field of light testing, in particular to a system for measuring evaluation data of the visibility of a headlamp.
Background
The head lamp is a lighting device which is arranged on two sides of the head of the automobile and is used for driving roads at night. The lighting effect of the headlamps directly affects the operation and traffic safety of driving at night. More and more customers are concerned about the illumination performance of headlamps. In order to standardize the development requirements of headlights, the traffic control authorities in all countries of the world generally stipulate the lighting standards of automotive headlights in a legal manner. The subjective evaluation of the light performance of the automobile lamp in the acceptance process of automobile development becomes an indispensable important link in the whole automobile development. An accurate and convenient headlamp visibility subjective evaluation data measuring system can accelerate the development process and effectively guarantee the accuracy and consistency of measuring results.
In the subjective evaluation experiment of the visibility of the headlights, light patterns of the headlights 5lx, 20lx and 50lx need to be drawn, and the light patterns need to be drawn by measuring the illumination intensity at different points of an experimental field and using a special tool. The current testing means is that a tester finds edge points with illumination intensity of 5lx, 20lx and 50lx according to points drawn in advance, and determines the positions of all the points by a tape measure. First, the conventional measurement method is time-consuming and labor-consuming. Finding an edge point of an concern intensity usually requires testing the illumination intensity of hundreds of points, a site of 15m by 200m and hundreds of test points, each test point also requires determining the position of each specific point by using a tape measure, a test engineer cannot complete the test for 2 hours, and a round of data measurement for 5-6 hours is complete according to different illumination intensities. Secondly, the traditional measuring method has low accuracy and poor consistency. Every point of engineer's manual test, the angle of putting of sensor, the height of putting will all cause the error because of personal factor, also can cause the inaccuracy of data because of measuring error when confirming the point position with the tape measure simultaneously, and the test of every platform truck all can guarantee the measuring process uniformity because of the manual operation is poor simultaneously.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a measuring system of headlamp visibility evaluation data, which is used for collecting illumination intensity in an automatic mode and collecting each illumination data to support evaluation of the headlamp visibility.
In order to achieve the purpose, the invention adopts the technical scheme that: a measuring system for headlamp visibility evaluation data is characterized in that a wireless gateway, illumination intensity detectors and an industrial computer are used for gridding a test field, each grid point is selected as an illumination intensity test point, each illumination intensity detector is arranged at each test point, and each illumination intensity detector is communicated with the wireless gateway and used for sending collected illumination intensity data to the wireless gateway and transmitting the illumination data to the industrial computer through the wireless gateway.
And coding each illumination intensity detector for distinguishing illumination intensity data of different test points.
The illumination intensity detectors arranged on each test point are the same in installation height and measurement angle.
The industrial computer distinguishes the illumination intensity detected by each illumination intensity detector through coding, and calculates a light shape graph according to the illumination intensity.
A method of measuring headlamp visibility evaluation data, comprising:
1) planning a test site, gridding the test site, and taking grid points as measurement points;
2) the experiment personnel number the illumination detectors in sequence and arrange the illumination detectors on each test point of the test site;
3) acquiring the illumination intensity of each point through an industrial computer, and judging whether the environment of the test site meets the requirements or not; if yes, go to step 4)
4) Placing the vehicle at a vehicle testing position, configuring the vehicle according to requirements, starting measurement, and turning on a headlamp;
5) the illumination intensity detector of each point collects illumination intensity data, coded data of the detector and the illumination intensity data are matched and then sent to the wireless gateway, and the wireless network sends the data to the industrial computer, so that the illumination intensity data of each test point are obtained.
And adjusting the distance between the test points to adjust the precision according to the precision requirement of the illumination intensity measurement.
And drawing a light pattern graph by the industrial computer according to the illumination data of each test point.
The invention has the advantages that: the test is simple and quick, and the test result is reliable; the data of each point required by the light pattern can be quickly detected; after the detector and the test points are arranged, the vehicle data testing device can be repeatedly used, the test is quick and reliable, multiple times of vehicle data measurement can be quickly carried out after the arrangement is finished, and the consistency of each measurement process is ensured; data is transmitted wirelessly, and measurement is rapid; each point of wireless data adopts serial number coding, and the test site is gridded, so that data analysis can be rapidly carried out.
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The contents of the expressions in the various figures of the present specification and the labels in the figures are briefly described as follows:
FIG. 1 is a schematic diagram of the structure of the test system of the present invention.
Detailed Description
The following description of preferred embodiments of the invention will be made in further detail with reference to the accompanying drawings.
In the prior art, edge points of a test field are manually searched for illumination intensity, then the edge points are drawn into a light shape graph through drawing, the light shape graph and data thereof are data for analyzing the illumination visibility of a headlamp, the light shape graph can be scaled on a drawing according to the test field, then the drawing on the drawing is confirmed through scaling according to the positions of the edge points on the test field, and then each edge point is connected to form the light shape graph. Taking 5lx as an example, obtaining a plurality of 5lx edge points through measurement, converting point positions of all points on a test field into position points on a drawing through proportion because the size of the test field is in corresponding proportion to the drawing, thereby completing drawing of the drawing, and forming a light shape drawing after connection. Then, in the prior art, the edge points are searched one by manually adopting a detector, and the mode is too difficult, low in efficiency, incapable of being reused and long in test time. Based on this, the present application provides a new measurement method:
the whole system comprises three parts: the system comprises an illumination intensity detector, a wireless gateway and a test PC. The test PC contains test management software and can communicate with each of the illumination intensity detectors through the wireless gateway. Each sensor may be encoded to correlate the relationship of the sensor to the test site of origin. Matrix arrangement is carried out in a test field by using an illumination intensity detector, the test field is gridded, and the illumination intensity of each point is measured; the light intensity detector transmits the measured data to the computer in a wireless mode, and the light shape can be analyzed quickly. The specific test process is as follows: firstly, an experimenter numbers sensors in sequence and arranges the sensors on each test point planned in an experimental field (the measurement precision can adjust and increase the distance a and the distance b of each sensor according to the requirement), reads the measurement result of each point and confirms whether the test environment meets the requirement or not; placing the vehicle on a vehicle position, and configuring the vehicle to start measurement according to requirements; the illumination intensity detector of each point collects illumination intensity data, and packs own coded data and light intensity data, and the wireless mode is utilized to send the packed data to the wireless gateway, and the gateway packs the data and sends the data to the test PC. And the test management software rapidly draws a light graph according to the test data of each point for an engineer to analyze.
The whole testing process can be finished by one testing engineer, the height of each sensor is fixed, and the measurement consistency of each measuring point is ensured by fixing the acquisition angle; after the arrangement is finished, the vehicle data can be rapidly measured for many times, and the consistency of each measurement process is ensured; data is transmitted wirelessly, and measurement is rapid; each point of wireless data adopts serial number coding, and the test site is gridded, so that data analysis can be rapidly carried out. 1. Matrix type sensor arrangement, gridding a test site; 2. and (5) numbering the sensors, and wirelessly collecting illumination data of each arrangement point.
As shown in fig. 1, a field is selected, a vehicle position is set on the field, a vehicle is placed on the vehicle position, the light direction of a vehicle headlamp is a test field, the field is gridded, a plane coordinate is established, and the coordinate of each grid point in the test field is recorded; an illumination intensity detector is arranged on each grid point formed by gridding and used for testing illumination intensity data of each grid point, the grids can be regular or irregular, a plurality of grid point setting test points are mainly completed after test fields are distinguished, a detector is arranged at each test point, the distances between the light measuring points arranged by the illumination intensity detectors and the ground are unified to be 5cm, the directions of the measuring angles are the same, and the positions, angles and heights of the detectors of the measuring points are the same as far as possible. The illumination intensity detector can be electronically coded and is conveniently used for identification of a measuring system, and a wireless communication chip is arranged in the illumination intensity detector and is used for wireless transmission of data.
The wireless gateway of the color lake in the test field is used for receiving the illumination intensity signals of each illumination intensity detector, when the illumination intensity data sent by each illumination intensity detector are sent to a computer through the wireless gateway, the computer can display and display the data, because each illumination intensity detector is coded, the illumination intensity corresponding to each code can be displayed, a tester can manually and quickly draw a light-shaped graph according to the illumination intensity displayed by each illumination test point on the computer, the operation of personnel can be reduced in the data acquisition stage, and the wireless gateway can be used for multiple times after one-time setting is completed.
Furthermore, each grid point formed by gridding is used as a test point, and in order to realize the regulation and control of precision, the distance between the grid points/the test points can be adjusted, so that the measurement is more accurate, the data acquisition is more reliable and accurate, more data samples are obtained, and the judgment and the drawing of the light-shaped graph by a tester are more reliable. As shown in fig. 1, the distance between a and b can be adjusted to meet the requirement of accuracy.
Further, the light pattern drawing module can be integrated into a computer, and the computer automatically draws patterns. The computer sets canvas points corresponding to each test point on a preset canvas which is scaled with a test field in a certain proportion, and then draws a light-shaped graph according to the detected light intensity data of each point in a preset mode of 5lx, 10lx and 50 lx. The drawing mode is that points meeting the illumination requirement are connected to form a closed curve, so that a light shape graph is formed.
It is clear that the specific implementation of the invention is not restricted to the above-described embodiments, but that various insubstantial modifications of the inventive process concept and technical solutions are within the scope of protection of the invention.
Claims (7)
1. A system for measuring evaluation data of visibility of a headlamp, characterized in that: the wireless gateway, the illumination intensity detectors and the industrial computer are used for gridding a test field, selecting each grid point as an illumination intensity test point, arranging one illumination intensity detector on each test point respectively, and communicating each illumination intensity detector with the wireless gateway to be used for sending collected illumination intensity data to the wireless gateway and transmitting the illumination data to the industrial computer through the wireless gateway.
2. A system for measuring headlamp visibility evaluation data according to claim 1, wherein: and coding each illumination intensity detector for distinguishing illumination intensity data of different test points.
3. A system for measuring headlamp visibility evaluation data according to claim 1, wherein: the illumination intensity detectors arranged on each test point are the same in installation height and measurement angle.
4. A system for measuring headlamp visibility evaluation data according to claim 2, wherein: the industrial computer distinguishes the illumination intensity detected by each illumination intensity detector through coding, and calculates a light shape graph according to the illumination intensity.
5. A method for measuring evaluation data of visibility of a headlamp, characterized by: the method comprises the following steps:
1) planning a test site, gridding the test site, and taking grid points as measurement points;
2) the experiment personnel number the illumination detectors in sequence and arrange the illumination detectors on each test point of the test site;
3) acquiring the illumination intensity of each point through an industrial computer, and judging whether the environment of the test site meets the requirements or not; if yes, go to step 4)
4) Placing the vehicle at a vehicle testing position, configuring the vehicle according to requirements, starting measurement, and turning on a headlamp;
5) the illumination intensity detector of each point collects illumination intensity data, coded data of the detector and the illumination intensity data are matched and then sent to the wireless gateway, and the wireless network sends the data to the industrial computer, so that the illumination intensity data of each test point are obtained.
6. A method for measuring headlamp visibility evaluation data according to claim 5, characterized in that: and adjusting the distance between the test points to adjust the precision according to the precision requirement of the illumination intensity measurement.
7. A method for measuring headlamp visibility evaluation data according to claim 5, characterized in that: and drawing a light pattern graph by the industrial computer according to the illumination data of each test point.
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| CN202011582787.9A CN112710456B (en) | 2020-12-28 | 2020-12-28 | System and method for measuring headlamp visibility evaluation data |
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| DE102013015718A1 (en) * | 2013-09-20 | 2015-03-26 | Audi Ag | Checking a light bulb on a vehicle |
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2020
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Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5321439A (en) * | 1992-10-14 | 1994-06-14 | Environmental Systems Products, Inc. | Vehicle headlight testing system |
| US20060256320A1 (en) * | 2005-05-12 | 2006-11-16 | Kurt Peterson | Apparatus and method for measuring the aim location of vehicle headlamps |
| CN101977167A (en) * | 2010-10-25 | 2011-02-16 | 深圳市兆讯达科技实业有限公司 | Gateway communication protocol conversion method for wireless sensor network access Modbus bus |
| DE102013015718A1 (en) * | 2013-09-20 | 2015-03-26 | Audi Ag | Checking a light bulb on a vehicle |
| JP2018054586A (en) * | 2016-09-23 | 2018-04-05 | 独立行政法人交通安全環境研究所 | Head lamp tester |
| CN107314892A (en) * | 2017-06-28 | 2017-11-03 | 奇瑞汽车股份有限公司 | Performance test methods and device are shone in vehicle head lamp road |
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