阅读说明：本技术 一种测试小车 (Test trolley ) 是由 疏达 李二洋 李�远 于 2019-09-03 设计创作，主要内容包括：本申请涉及激光测试领域,尤其涉及一种测试小车本申请包括：车体、设置在车体上的控制系统、动力系统、激光测距系统和自检系统,所述的控制系统与动力系统、激光测距系统、自检系统信息连通,用于控制各系统工作,进行数据处理；所述的动力系统用于驱动车体,实现车体的启停和加速、减速；所述的激光测距系统用于在车体暂停时测距,得到车体实际运动距离S<Sub>n</Sub>’；所述的自检系统用于将车体实际运动距离S<Sub>n</Sub>’与控制系统计算的理论距离S<Sub>n</Sub>比较,得出距离误差。本申请通过自检系统将车体实际运动距离S<Sub>n</Sub>’与控制系统计算的理论距离S<Sub>n</Sub>比较,得出距离误差。操作人员可根据距离误差大小及时发现问题,对测试小车装置或操作软件进行调整维护。(The application relates to laser test field especially relates to a test dolly this application includes: the control system is communicated with the power system, the laser ranging system and the self-checking system and is used for controlling the work of each system and processing data; the power system is used for driving the vehicle body to realize starting and stopping, acceleration and deceleration of the vehicle body; the laser ranging system is used for ranging when the vehicle body is suspended to obtain the actual movement distance S of the vehicle body n '; the self-checking system is used for measuring the actual movement distance S of the vehicle body n ' theoretical distance S calculated from control System n And comparing to obtain the distance error. The application utilizes the self-checking system to detect the actual movement distance S of the vehicle body n ' theoretical distance S calculated from control System n And comparing to obtain the distance error. The operator can find problems in time according to the distance error, and test the trolley device orAnd operating software to perform adjustment and maintenance.)

1. A test cart, comprising: a vehicle body, a control system, a power system, a laser ranging system and a self-checking system which are arranged on the vehicle body,

The control system is communicated with the power system, the laser ranging system and the self-checking system and is used for controlling the work of each system and processing data;

The power system is used for driving the vehicle body to realize starting and stopping, acceleration and deceleration of the vehicle body;

The laser ranging system is used for ranging when the vehicle body is suspended to obtain the actual movement distance S of the vehicle body_n’；

The self-checking system is used for measuring the actual movement distance S of the vehicle body_n' theoretical distance S calculated from control System_nAnd comparing to obtain the distance error.

2. The test trolley as claimed in claim 1, wherein the self-checking system comprises a switch, a comparator and an output device, the switch, the comparator and the output device are in information communication, and the switch is used for starting and stopping the operation of the self-checking system; the comparator is used for comparing the actual movement distance of the vehicle body with the theoretical distance calculated by the control system to obtain a distance error; the output device is used for outputting the distance error to a control system or an operator.

3. The test trolley according to claim 1 or 2, wherein the comparator is integrated with the laser ranging system or is separate therefrom.

4. The test cart according to claim 3, wherein the threshold distance error is less than ± 15 mm.

5. The test cart of claim 4, wherein the speed of the drive train body is 0.5-2cm/S, S_n=S_n-1+1 m, n is 1-22.

6. the test cart of claim 5, wherein the output device is a display screen or a communication port in communication with a rear service desk.

7. The test trolley as claimed in claim 6, wherein the control system is a single chip or a microprocessor.

8. The test cart of claim 7, wherein the power system comprises a drive motor, a gear coupled to a power output shaft of the drive motor, and a rack engaged with the gear, the rack being secured to the test path of the test cart.

9. The test trolley as claimed in claim 8, wherein the trolley body is a mounting rack for mounting the control system, the power system, the laser ranging system and the self-checking system, a first sliding block is mounted at the bottom of the mounting rack, and a track matched with the first sliding block is connected below the first sliding block in a sliding manner.

10. The test cart of claim 9, wherein the track is a single track, and the rack is fixed to one side of the track; or the tracks are double tracks, and the rack is fixed in the middle of the two tracks or on the outer sides of the two tracks.

Technical Field

The application relates to the technical field of laser radar equipment, in particular to a test trolley.

Background

At present, the factory calibration link of the laser radar mainly comprises: the laser radar, the tester and the test background plate are completed together. In the calibration process, a worker who needs to test moves the laser radar to each test point according to the distance point marked on the ground, and collects the test data of the laser radar to finish the calibration of the laser radar. However, the operation mode is affected by operation errors of workers, so that the misjudgment rate of the calibration result is high, and the production yield is affected; in addition, the manual operation mode of workers has low production efficiency and high production cost.

The technical personnel in the field have designed a test dolly for this reason, set up laser radar on the test dolly, remove, the calibration, this kind of operation mode degree of automation is high, has reduced artifical error, nevertheless if test dolly itself appears the error, operating personnel can not in time directly acquire the detailed information of error, and then according to error information, adjusts fast accurately.

Therefore, it is desirable to provide a test cart that is capable of self-testing.

Disclosure of Invention

the embodiment of the application provides a test trolley, and solves the problem that error detailed information cannot be directly acquired in time after an error occurs in the prior art.

To achieve the purpose, the embodiment of the invention adopts the following technical scheme:

In one aspect, a test cart comprises: a vehicle body, a control system, a power system, a laser ranging system and a self-checking system which are arranged on the vehicle body,

the control system is communicated with the power system, the laser ranging system and the self-checking system and is used for controlling the work of each system and processing data;

The power system is used for driving the vehicle body to realize starting and stopping, acceleration and deceleration of the vehicle body;

the laser ranging system is used for ranging when the vehicle body is suspended to obtain the actual movement distance S of the vehicle body_n’；

The self-checking system is used for measuring the actual movement distance S of the vehicle body_n' theoretical distance S calculated from control System_nAnd comparing to obtain the distance error.

In a possible implementation manner, the self-checking system comprises a switch, a comparator and an output device, wherein the switch, the comparator and the output device are communicated in information, and the switch is used for starting and stopping the self-checking system; the comparator is used for comparing the actual movement distance of the vehicle body with the theoretical distance calculated by the control system to obtain a distance error; the output device is used for outputting the distance error to a control system or an operator.

In a possible implementation, the comparator is integrated with the laser ranging system or is arranged separately.

In a possible implementation, the threshold value of the distance error is less than ± 15 mm.

In one possible implementation mode, the speed of the vehicle body driven by the power system is 0.5-2cm/S, S_n=S_n-1+1 m, n is 1-22.

In a possible implementation manner, the output device is a display screen or a communication terminal which is in information communication with a rear service desk.

in a possible implementation manner, the control system is a single chip microcomputer or a microprocessor.

in a possible implementation manner, the power system comprises a driving motor, a gear connected with a power output shaft of the driving motor, and a rack engaged with the gear, and the rack is fixed on a test path of the test trolley.

In a possible implementation mode, the vehicle body is a mounting rack for mounting a control system, a power system, a laser ranging system and a self-checking system, a first sliding block is mounted at the bottom of the mounting rack, and a track matched with the first sliding block is connected below the first sliding block in a sliding mode.

In one possible implementation manner, the track is a single track, and the rack is fixed on one side of the track; or the tracks are double tracks, and the rack is fixed in the middle of the two tracks or on the outer sides of the two tracks.

According to the embodiment of the application, the actual movement distance S of the vehicle body is detected through the self-checking system_n' theoretical distance S calculated from control System_nAnd comparing to obtain the distance error. The operator can find problems in time according to the distance error, and adjust and maintain the test trolley device or the operation software.

drawings

FIG. 1 is a schematic view of the test cart according to the embodiment of the present application.

FIG. 2 is a schematic diagram of information connectivity in an embodiment of the present application.

FIG. 3 is an exploded view of the test cart according to the exemplary embodiment of the present disclosure.

Fig. 4 is a schematic track diagram according to an embodiment of the present application.

In the figure: a vehicle body; 2. a control system; 3. a power system; 4. a laser ranging system; 5. a self-checking system; 6. a switch; 7. a comparator; 8. an output device; 9. a drive motor; 10. a gear; 11. a rack; 12. a first slider; 13. a second slider; 14. a motor mounting plate; 15. a guide rail; 16. a base plate; 17. a U-shaped groove; 18. a track; 19. and a transverse rail.

Detailed Description

The technical scheme of the application is further explained by the specific implementation mode in combination with the attached drawings.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, apparatus, article, or device that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or device.

As shown in the figure, the test trolley comprises: a vehicle body 1, a control system 2 arranged on the vehicle body 1, a power system 3, a laser ranging system 4 and a self-checking system 5,

The control system 2 is in information communication with the power system 3, the laser ranging system 4 and the self-checking system 5 and is used for controlling the work of each system and processing data;

The power system 3 is used for driving the vehicle body 1 to realize starting and stopping, acceleration and deceleration of the vehicle body 1;

the laser ranging system 4 is used for ranging when the vehicle body 1 is suspended to obtain the actual movement distance S of the vehicle body 1_n'; wherein n is the number of vehicle body pauses.

The self-checking system 5 is used for measuring the actual movement distance S of the vehicle body_n' theoretical distance S calculated from control System 2_nAnd comparing to obtain the distance error.

The control system 2 can accurately calculate the theoretical distance S of the vehicle body 1 driven by the power system 3 to move by controlling the working time and the speed of the power system 3_n，And moving the vehicle body 1 by a theoretical distance S_nSending the data to a self-checking system; the laser ranging system 4 is in a stable state when the vehicle is paused, and measures the distance of the departure point (the departure point is generally provided with a background plate as a test target at the moment), so that the actual movement distance S of the vehicle body can be obtained_n' and the actual movement distance S of the vehicle body_n' sending to a self-checking system; every time the vehicle is suspended, the self-checking system is about the actual movement distance S of the vehicle body_n' theoretical distance S calculated from control System 2_nAnd comparing to obtain a distance error, and if the distance error does not exceed the threshold value, the test trolley is normal and the test process is continued. When the distance error exceeds the threshold value, the test trolley is indicated to have a fault, and an operator needs to adjust and maintain.

In the embodiment of the application, the actual movement distance S of the vehicle body is detected through the self-checking system 5_n' theoretical distance S calculated from control System 2_nAnd comparing to obtain the distance error. Because the distance error is obtained in real time, an operator can find problems in time according to the distance error, and adjust and maintain the test trolley device or the operation software, so that the test error is reduced.

The self-checking system 5 comprises a switch 6, a comparator 7 and an output device 8, the switch 6, the comparator 7 and the output device 8 are communicated in information, and the switch 6 is used for starting and stopping the self-checking system 5; the comparator 7 is used for comparing the actual movement distance of the vehicle body 1 with the theoretical distance calculated by the control system 2 to obtain a distance error; the output device 8 is used to output the distance error to the control system 2 or to an operator.

The switch 6 can be set to be started and stopped by pressing for 3-5 seconds, and the self-checking system 5 is prevented from being touched by mistake.

The comparator 7 and the laser ranging system 4 are arranged integrally or separately.

The comparator may be a comparing module in the laser ranging system 4, or may be an independent comparing circuit, the comparing circuit is in information communication with the laser ranging system 4 through a digital-to-analog converter (not shown in the figure), and both the comparing module and the comparing circuit are in the prior art.

The threshold value of the distance error is less than +/-15 mm.

The threshold value of the distance error is set to be less than +/-15 mm, and the actual movement distance S of the vehicle body is within the numerical range_n' theoretical distance S calculated from control System 2_nThe difference is not large, and the measurement precision meets the actual requirement.

The speed of the power system 3 driving the vehicle body 1 is 0.5-2cm/S, S_n=S_n-1+1 m, n is 1-22.

The speed of the driving vehicle body 1 is 0.5-2cm/s, the calibration time is too long when the speed is too slow, and the efficiency is low; too fast, dolly stability probably worsens, influences the calibration accuracy. The pause interval of the test trolley is set to be 1 meter, the pause times are 1-22 times, taking 22 meters as an example, the test trolley pauses 22 times, and the test trolley pauses once every other meter to perform self-checking. The operating personnel can know the working state of the test trolley in real time every other meter, find faults in time and facilitate debugging and maintenance.

The output device 8 is a display screen or a communication end communicated with the information of a rear service desk.

The output device 8 is a display screen, the distance error value is directly displayed on the display screen, and when the distance error value is larger than the distance error threshold value, the display screen gives a fault prompt to prompt a field operator to overhaul. When the output device 8 is a communication end, when the distance error value is greater than the distance error threshold value, the communication end sends the distance error value to the rear service desk, the rear service desk performs subsequent overhaul judgment according to the distance error value, and when the distance error value is greater than 30mm, the rear service desk preferentially checks the software of the control system; when the distance error value is larger than 15mm and smaller than 30mm, the rear service desk preferentially checks the mechanical structure of the test trolley.

The control system 2 is a singlechip or a microprocessor.

The power system 3 comprises a driving motor 9, a gear 10 connected with a power output shaft of the driving motor 9 and a rack 11 meshed with the gear 10, wherein the rack 11 is fixed on a test path of the test trolley.

the power system 3 is used for driving the vehicle body 1 to run along a test path, so that the distance between the laser ranging system 4 and a test target is changed continuously, and a plurality of groups of data are measured according to the changes. The power system 3 can have a plurality of structural modes, such as: in order to solve the above problems, as shown in the figure, the power system 3 in the technical solution provided by the present application includes a driving motor 9, a gear 10 connected to a power output shaft of the driving motor 9, and a rack 11 engaged with a gear 32, and the rack 11 is fixed on a test path of the multi-machine test apparatus. The driving mode formed by the rack 11 and the gear 10 ensures that the calculation of the real distance is not influenced by the ground environment when the power system 3 drives the vehicle body 1 to run along the testing path, so that more accurate real distance is obtained and the measuring error of the laser ranging system 4 is reflected more truly.

The automobile body be an installation control system 2, driving system 3, laser ranging system 4, self-checking system 5's mounting bracket, first slider 12 is installed to the mounting bracket bottom, the below sliding connection of first slider 12 has rather than assorted track 18.