阅读说明：本技术 一种基于激光雷达的火车称重系统触发装置 (Train weighing system trigger device based on laser radar ) 是由 王瑞 韩侠 张彤 于 2020-12-01 设计创作，主要内容包括：本申请涉及车辆探测领域,尤其涉及一种基于激光雷达的火车称重系统触发装置。本申请包括：设置在称重台侧方,用于对火车车轮探测的多个激光雷达位置,在同一称重台侧方至少设置两个激光雷达；用于根据激光雷达发来的距离数据判断火车车厢是否处在称重台上的控制单元,当激光雷达未探测到火车车轮时,实时距离数据大于预存的阈值,当同一称重台侧方设置的激光雷达发来的实时距离数据均大于预存的阈值时,控制单元判定火车车厢在称重台上；用于接收控制单元发出的指示信号,并根据指示信号向火车称重系统发出触发信号的通信单元。本申请采用激光雷达扫描火车的车轮来判断火车车厢在称重台上的位置,自动化程度高,准确性高。(The application relates to the field of vehicle detection, in particular to a train weighing system triggering device based on a laser radar. The application includes: the laser radar weighing system is arranged on the side of the weighing platform and used for detecting the train wheels, and at least two laser radars are arranged on the side of the same weighing platform; the control unit is used for judging whether the train carriage is on the weighing platform or not according to the distance data sent by the laser radar, when the laser radar does not detect a train wheel, the real-time distance data is greater than a pre-stored threshold value, and when the real-time distance data sent by the laser radar arranged on the side of the same weighing platform is greater than the pre-stored threshold value, the control unit judges that the train carriage is on the weighing platform; and the communication unit is used for receiving the indication signal sent by the control unit and sending a trigger signal to the train weighing system according to the indication signal. This application adopts the wheel of laser radar scanning train to judge the position of railway carriage on weighing the platform, and degree of automation is high, and the accuracy is high.)

1. A train weighing system trigger device based on laser radar, its characterized in that includes:

the laser radars are arranged on the side of the weighing platform and used for detecting train wheels, and at least two laser radars are arranged on the side of the same weighing platform;

the control unit is used for judging whether the train carriage is on the weighing platform or not according to distance data sent by the laser radar, the control unit prestores a threshold value, when a train runs on the weighing platform, the control unit starts the laser radar to detect, when the laser radar does not detect train wheels, real-time distance data are larger than the prestored threshold value, when the real-time distance data sent by the laser radar arranged on the side of the same weighing platform are larger than the prestored threshold value, the control unit judges that laser radar emergent light passes between the train wheels, and at the moment, the train carriage is on the weighing platform and sends an indication signal;

the communication unit is used for receiving the indication signal sent by the control unit and sending a trigger signal to the train weighing system according to the indication signal;

the laser radar and the communication unit are in signal communication with the control unit.

2. The lidar-based train weighing system triggering device according to claim 1, wherein the lidar is a 3D lidar having a horizontal field angle of ± 25-50 °, a vertical field angle of ± 5-15 °, and a detection distance of 0.5-25 meters.

3. The lidar-based train weighing system triggering device according to claim 2, wherein the lidar is a 3D lidar having a horizontal field angle of ± 30-40 °, a vertical field angle of ± 8-10 °, and a detection distance of 1-10 meters.

4. The train weighing system triggering device based on lidar of claim 3, wherein when two lidar are disposed to the side of the same weighing station, the two lidar are disposed at the same side of the weighing station.

5. The train weighing system triggering device based on the lidar according to claim 4, wherein when two lidar are arranged at the side of the same weighing platform, the distance between the two lidar and the weighing platform is equal and is 1.5-2 meters.

6. The lidar based train weighing system trigger device of claim 5, wherein the laser radars are spaced apart by 1-2 meters and are set at a height of 25-30 cm.

7. The lidar based train weighing system trigger device of claim 6, wherein said threshold value is 2-3 meters.

8. The lidar-based train weighing system trigger device of claim 7, further comprising a power supply, wherein the power supply is connected to the lidar and the control unit for supplying power to the lidar and the control unit.

9. The lidar-based train weighing system trigger device of claim 8, wherein the lidar is in communication with the control unit via a TCP interface.

10. The lidar based train weighing system trigger device of claim 9, wherein said plurality of lidar are in communication via a CAN interface.

Technical Field

The application relates to a vehicle detection device, in particular to a train weighing system trigger device based on a laser radar.

Background

Whether the phenomena of overload, unbalance loading and the like exist in the train or not is one of main factors influencing the transportation safety of railway goods, and the phenomena of overload, unbalance loading or unbalance loading are important potential safety hazards for the safe operation of vehicles. In order to avoid the potential safety hazards, the railway supervision department installs freight measurement safety detection equipment such as a track scale, an overload and unbalance loading instrument or a wheel load instrument at an important station, a freight yard and a marshalling station, and the train dynamically weighs on a track scale circuit according to the required speed so as to play a certain role in controlling the overload and unbalance loading phenomenon. However, in order to evade the inspection, some merchants reduce the weight of the train cargo detected by the weighing system, and increase wheels can make the center of gravity of the train carriage not on the weighing platform, which results in that the weight of the train carriage detected by the weighing platform is lower. How to judge whether the train carriage is on the weighing platform so as to trigger weighing at a proper position and improve the accuracy of the weighing system is a problem to be solved by the technical personnel in the field.

Disclosure of Invention

The embodiment of the application provides a train weighing system trigger device based on a laser radar, and solves the problem that the prior art has no method for detecting whether a train carriage is on a weighing platform or not.

In one aspect, a train weighing system trigger device based on laser radar includes:

the laser radars are arranged on the side of the weighing platform and used for detecting train wheels, and at least two laser radars are arranged on the side of the same weighing platform;

the control unit is used for judging whether the train carriage is on the weighing platform or not according to the distance data sent by the laser radar, the control unit prestores a threshold value, when the laser radar does not detect a train wheel, the real-time distance data is larger than the prestored threshold value, and when the real-time distance data sent by the laser radar arranged on the side of the same weighing platform are both larger than the prestored threshold value, the control unit judges that the train carriage is on the weighing platform and sends out an indication signal;

the communication unit is used for receiving the indication signal sent by the control unit and sending a trigger signal to the train weighing system according to the indication signal;

the laser radar and the communication unit are in signal communication with the control unit.

In a possible implementation manner, the laser radar is a 3D laser radar, the horizontal angle of view is +/-25-50 degrees, the vertical angle of view is +/-5-15 degrees, and the detection distance is 0.5-25 meters.

In a possible implementation manner, the laser radar is a 3D laser radar, the horizontal field angle is +/-30-40 degrees, the vertical field angle is +/-8-10 degrees, and the detection distance is 1-10 meters.

In one possible implementation, when two laser radars are arranged on the side of the same weighing platform, the two laser radars are arranged on the same side of the weighing platform.

In a possible implementation mode, when two laser radars are arranged on the side of the same weighing platform, the distance between the two laser radars and the weighing platform is equal and is 1.5-2 meters.

In a possible implementation mode, the distance between the laser radars is 1-2 meters, and the set height is 25-30 cm.

In one possible implementation, the threshold is 2-3 meters.

In a possible implementation manner, the train weighing system triggering device based on the laser radar further comprises a power supply, and the power supply is connected with the laser radar and the control unit and used for supplying power to the laser radar and the control unit.

In a possible implementation manner, the laser radar is communicated with the control unit through a TCP interface.

In a possible implementation manner, the plurality of laser radars are communicated through a CAN interface.

This application adopts the wheel of 3D laser radar scanning train to judge the position of railway carriage on weighing the bench at the in-process that the train marchd, triggers weighing system when whole carriage is in weighing the suitable position of bench and weighs, and degree of automation is high, and has improved weighing system's accuracy greatly.

Drawings

Fig. 1 is a schematic diagram of the working principle of the present application.

Fig. 2 is a schematic diagram of the module connection of the present application.

In the figure: 1. a weighing platform; 2. a wheel; 3. a laser radar; 4. a control unit; 5. a communication unit; 6. a power source; 7. a railway car; 8. train weighing system.

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 fig. 1 and 2, a train weighing system trigger device based on laser radar comprises:

the laser radars 3 are arranged on the side of the weighing platform 1 and used for detecting the train wheels 2, and at least two laser radars 3 are arranged on the side of the same weighing platform 1;

the control unit 4 is used for judging whether the train carriage 7 is on the weighing platform 1 or not according to the distance data sent by the laser radar 3, the control unit 4 prestores a threshold value, when the train runs on the weighing platform 1, the control unit 4 starts the laser radar 3 to detect, when the laser radar 3 does not detect the train wheels 2, the real-time distance data is larger than the prestored threshold value, when the real-time distance data sent by the laser radar 3 arranged on the side of the same weighing platform 1 are larger than the prestored threshold value, the control unit 4 judges that the emergent light of the laser radar 3 passes between the train wheels 2, and at the moment, the train carriage is on the weighing platform and sends an indication signal;

the communication unit 5 is used for receiving the indication signal sent by the control unit 4 and sending a trigger signal to the train weighing system 8 according to the indication signal;

the laser radar 3 and the communication unit 5 are in signal communication with the control unit 4.

In the train weighing system trigger device based on the laser radar, the train weighing system 8 comprises a weighing sensor (not shown in the figure), when the train passes through the weighing platform 1, the weighing sensor is triggered to work, the weighing sensor sends a starting signal to the control unit 4 through a switch signal device, and the control unit 4 starts to work.

The laser radar 3 is arranged on the side of the weighing platform 1 and emits light towards the weighing platform 1, the emitted light irradiates a preset target or a wheel 2 to be reflected, the reflected light is received by the laser radar 3, real-time distance data are obtained after data processing of the laser radar 3 and are sent to the control unit 4, a threshold value is prestored in the control unit 4, and the control unit 4 compares the real-time distance data with the threshold value. When the train passes through the weighing platform 1, the control unit 4 starts to send an instruction to the laser radar 3, the laser radar 3 starts to detect, emergent light irradiates the wheels 2 or penetrates between the wheels to irradiate a preset target, and real-time distance data is measured. When the laser radar 3 detects the train wheel 2, the real-time distance data is not larger than a pre-stored threshold value; when the laser radar 3 does not detect the train wheel 2, the measured real-time distance data is larger than a pre-stored threshold value; therefore, when the real-time distance data sent by the laser radars 3 arranged on the side of the same weighing platform 1 are all larger than the pre-stored threshold value, it is indicated that the plurality of laser radars 3 do not detect the train wheels 2, at the moment, the emergent light path of the laser radars 3 is located between the two groups of train wheels 2, the control unit 4 judges that the train carriage 7 is on the weighing platform 1 and sends out an indication signal, the communication unit 5 sends a trigger signal to the train weighing system 8 according to the indication signal, and the train weighing system 8 starts weighing.

The train weighing system 8 is a rail weighbridge, an overload and unbalance loading instrument or a wheel weight instrument, and can dynamically measure the weight of a train carriage.

The laser radar 3 is a 3D laser radar, the horizontal field angle of the laser radar is +/-25-50 degrees, the vertical field angle of the laser radar is +/-5-15 degrees, and the detection distance is 0.5-25 meters.

The laser radar 3 is a 3D laser radar, the horizontal field angle of the laser radar is +/-30-40 degrees, the vertical field angle of the laser radar is +/-8-10 degrees, and the detection distance is 1-10 meters.

According to different train models, the distance range of the two groups of train wheels 2 is 4.7-5.2m, a certain gap also exists between the same group of trains 2, if a single-point laser radar is adopted, the two single-point laser radars do not detect the wheels 2, the condition that the two single-point laser radars simultaneously pass through the gap between the adjacent wheels in the same group exists, and the 3D laser radar is adopted, so that the condition can be eliminated, and the distance between the two groups of wheels 2 is 4.7-5.2 m.

When two laser radars 3 are arranged on the side of the same weighing platform 1, the two laser radars 3 are arranged on the same side of the weighing platform 1.

When two laser radars 3 are arranged on the side of the same weighing platform 1, the distances between the two laser radars 3 and the weighing platform 1 are equal and are 1.5-2 meters.

The laser radar 3 is arranged on the same side of the weighing platform 1, the distance between the laser radar 3 and the weighing platform 1 is equal, the distance between the laser radar 3 and the weighing platform is 1.5-2 meters, and if the laser radar is too far away, the installation space required by the whole trigger device is too large, so that the trigger device is inconvenient to install. If the distance is too close, certain potential safety hazards exist.

The distance between the laser radars 3 is 1-2 m, and the set height is 25-30 cm.

Since the distance from the bottom of the railway carriage to the rail is generally 35cm, the rail is generally 14cm high, and in order to prevent the 3D laser radar light spot from detecting the train body or the rail, the installation height of the radar needs to be higher than the rail and lower than the bottom of the carriage, and the requirement can be met by setting the height to be 25-30 cm.

The threshold value is 2-3 meters.

The distance between the laser radar 3 and the weighing platform 1 is 1.5-2 meters, the train runs on the weighing platform 1, the train wheel 2 is at a certain distance from the edge of the weighing platform 1, and the real-time distance when the laser radar 3 detects the train wheel is lower than 2-3 meters, so that the threshold value is 2-3 meters, and the design requirement can be met.

Train weighing system trigger device based on laser radar still include power 6, power 6 be connected with laser radar 3, control unit 4 for to laser radar 3, control unit 4 power supply.

The laser radar 3 is communicated with the control unit 4 through a TCP interface.

The plurality of laser radars 3 are communicated through CAN interfaces.

The whole train weighing system triggering device based on the laser radar adopts the power supply 6 to supply power, the voltage of the power supply 6 is 12V, the laser radar 3 is communicated with the control unit 4 through a TCP interface, and the laser radar 3 is communicated with the CAN interface.

The technical principles of the present application have been described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the present application and is not to be construed in any way as limiting the scope of the application. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present application without inventive effort, which shall fall within the scope of the present application.