Method for speed measurement of a vehicle by means of a flat-bed dynamic weighing system and related apparatus

Abstract

A kind of method for the speed measurement of flat dynamic weighing system of vehicle and related equipment, the method includes: when the wheel group of vehicle passes through first coil, trigger flat dynamic weighing system to start speed measurement process, and obtain the first vehicle induction signal generated by induction flat;Trigger flat dynamic weighing system to end speed measurement process, and obtain the second vehicle induction signal generated by induction flat;Obtain the vehicle induction data of other wheel groups of vehicle, and summarize as vehicle total sensing data;According to vehicle total sensing data, generate sensing voltage, time as coordinate data graph;According to the width of induction flat and the sampling frequency of flat dynamic weighing system, the speed of the wheel group of vehicle is calculated;The speed of other wheel groups of vehicle is calculated, and according to data graph, the number of wheel groups is obtained, and the average speed of output vehicle is calculated.The present application reduces the speed measurement error by calculating mean value, and uses image for speed analysis, avoids the leakage of vehicle flow, improves the speed measurement efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of intelligent transportation, in particular to a method for speed measurement of a flat dynamic weighing system for vehicles and related equipment. BACKGROUND

[0002] In recent years, with the rise of Internet platform economy, the highway logistics industry has developed rapidly, the road network scale has been upgraded, the transportation service level has been significantly improved, the traffic demand has increased sharply, and the operation and management pressure has been increasing, making the highway transportation work more and more challenging.

[0003] Among them, the overloaded and overspeed transportation of highway freight vehicles has become a serious problem that endangers traffic safety. Overloaded and overspeed transportation makes the road and bridge unable to bear the heavy load, reduces the service life of the road and bridge, and greatly increases the road maintenance cost; at the same time, the safety factor of overloaded and overspeed vehicles is greatly reduced, which constantly causes traffic accidents; in addition, overloaded and overspeed vehicles also easily cause traffic congestion and environmental pollution, which has become a prominent problem affecting the social and economic order.

[0004] The traditional commonly used highway overload and overspeed system generally uses a coil speed measurement method, which uses a coil to measure speed while the sensor is weighing. Coil speed measurement, also known as ground inductive coil speed measurement, is to bury a coil in the road surface to measure. Ground inductive coil speed measurement generally uses two coils, and the area between the two coils is the speed monitoring area. When the motor vehicle enters the first coil, it will generate electromagnetic induction in the circuit, and at the same time trigger the timer to start timing; after leaving the second coil, the timing ends, and according to the distance between the two coils and the time difference of the generated induction, the speed of the vehicle passing through the overspeed monitoring area can be calculated by dividing the distance by the time. The problem is that this mode of speed measurement has many drawbacks: first, there is a time error from the motor vehicle triggering the coil to generating electromagnetic induction; second, since the coil is a ring-closed frame structure, the motor vehicle needs to cut the magnetic induction line above the coil to trigger the timer, resulting in errors in the calculated distance regardless of which coil edge line or center line is taken. The above objective errors ultimately lead to inaccurate speed measurement of the entire system; and most importantly, for long plate type multi-axle mounted trucks, due to the hollow structure of the long plate, the coil cannot generate electromagnetic induction when the motor vehicle passes through the coil, resulting in invalid speed measurement. When the motor vehicle speed is too fast, the coil cannot generate electromagnetic induction in time, resulting in the final inability to measure speed. SUMMARY

[0005] The present application aims to solve the problem of time error in the process of measuring the speed of the motor vehicle from triggering the coil to generating electromagnetic induction in the prior art, which affects the calculation accuracy.

[0006] To solve the above technical problems, in a first aspect, embodiments of the present application provide a method for measuring the speed of a vehicle using a flat dynamic weighing system, the flat dynamic weighing system comprising a first coil, an induction flat, and a second coil, the method comprising the following steps:

[0007] S1, when a wheel set of the vehicle passes through the first coil, triggering the flat dynamic weighing system to start the speed measurement process and obtaining a first vehicle induction signal generated by the induction flat when the wheel set passes through;

[0008] S2, when the wheel set of the vehicle leaves the second coil, triggering the flat dynamic weighing system to end the speed measurement process and obtaining a second vehicle induction signal generated by the induction flat when the wheel set leaves;

[0009] S3, obtaining vehicle induction data of other wheel sets of the vehicle according to the method of steps S1 and S2, and summarizing the data as total vehicle sensing data;

[0010] S4, generating a data graph with sensing voltage and time as coordinates according to the total vehicle sensing data;

[0011] S5, calculating the speed of the wheel set of the vehicle according to the width of the induction flat and the sampling frequency of the flat dynamic weighing system;

[0012] S6, calculating the speed of other wheel sets of the vehicle according to the method of step S5, and obtaining the number of wheel sets according to the data graph, and calculating the average speed of the vehicle.

[0013] Further, in step S5, define the time when the first vehicle induction signal is generated as N1, the time when the second vehicle induction signal is generated as N2, the width of the induction flat as d, and the sampling frequency of the flat dynamic weighing system as K, then the speed of the wheel set of the vehicle satisfies the following relationship (1):

[0014] V1=(K*d) / (N2-N1) (1).

[0015] Further, define the speed of other wheel sets of the vehicle as at least V2, …, Vn, and the number of peaks on the inductance voltage coordinates in the data graph as n, then the average speed of the vehicle satisfies the following relationship (2):

[0016] V=(V1+V2+…+Vn) / n (2).

[0017] In a second aspect, embodiments of the present application also provide a system for measuring the speed of a vehicle using a flat dynamic weighing system, the flat dynamic weighing system comprising a first coil, an induction flat, and a second coil, comprising:

[0018] A first inductive unit is configured to trigger the flat-plate dynamic weighing system to start a speed measurement process and obtain a first vehicle sensing signal generated by the inductive flat plate when a wheel set of a vehicle passes through the first coil;

[0019] A second inductive unit is configured to trigger the flat-plate dynamic weighing system to end the speed measurement process and obtain a second vehicle sensing signal generated by the inductive flat plate when the wheel set of the vehicle leaves the second coil;

[0020] An inductive unit is configured to control the first inductive unit and the second inductive unit to obtain vehicle sensing data of other wheel sets of the vehicle and aggregate the vehicle sensing data into total vehicle sensing data;

[0021] An image analysis unit is configured to generate a data graph with sensing voltage and time as coordinates according to the total vehicle sensing data;

[0022] A wheel set speed calculation unit is configured to calculate the speed of the wheel set of the vehicle according to the width of the inductive flat plate and the sampling frequency of the flat-plate dynamic weighing system;

[0023] An average speed calculation unit is configured to calculate the speed of other wheel sets of the vehicle according to the wheel set speed calculation unit, obtain the number of wheel sets according to the data graph, and calculate the average speed of the vehicle.

[0024] In a third aspect, an embodiment of the present application also provides a computer device, which comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the steps in the method for speed measurement of a flat-plate dynamic weighing system for a vehicle according to any one of the above embodiments when executing the computer program.

[0025] In a fourth aspect, an embodiment of the present application also provides a computer readable storage medium, which stores a computer program, and the computer program implements the steps in the method for speed measurement of a flat-plate dynamic weighing system for a vehicle according to any one of the above embodiments when executed by a processor.

[0026] The embodiment of the present application has the following beneficial technical effects:

[0027] 1. The speed of multiple wheel sets of the same vehicle is calculated, and the average value is calculated to obtain the speed of the vehicle, which maximally restores the actual running condition of the vehicle and reduces the error influence caused by uneven road surface, process braking, and vehicle body shaking;

[0028] 2. The speed analysis method using the weighing data image can realize speed measurement when the vehicle passes through the flat-plate area, and eliminates the missed measurement condition;

[0029] 3. The method does not occupy the running process of the speed measurement system, the entire speed measurement process can be synchronized with the measurement of other vehicles, and the work efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a step flowchart of the method for speed measurement of the flat plate type dynamic weighing system for vehicles provided by the embodiment of the present application;

[0031] Figure 2 is a structural diagram of the flat plate type dynamic weighing system provided by the embodiment of the present application;

[0032] Figure 3 is a data diagram of the dual-axle motor vehicle provided by the embodiment of the present application;

[0033] Figure 4 is a structural diagram of the system 200 for speed measurement of the flat plate type dynamic weighing system for vehicles provided by the embodiment of the present application;

[0034] Figure 5 is a structural diagram of the computer device provided by the embodiment of the present application. DETAILED DESCRIPTION

[0035] In order to make the objects, technical solutions and advantages of the present application clearer, the present application is further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0036] Please refer to Figure 1 , Figure 1 is a step flowchart of the method for speed measurement of the flat plate type dynamic weighing system for vehicles provided by the embodiment of the present application, the flat plate type dynamic weighing system comprises a first coil, an induction flat plate and a second coil, for example, the flat plate type dynamic weighing system structure used by the embodiment of the present application is as shown in Figure 2 , in the process of driving along a straight line, any group of wheels of the vehicle will pass through the first coil, the induction flat plate and the second coil in turn, wherein the first coil, the induction flat plate and the second coil should be regarded as a whole, when the coil triggers, the entire speed measurement system is started, at the same time, the wheels will also quickly pass through the induction flat plate to generate a weight sensing signal, so as to realize data acquisition, specifically, the method comprises the following steps:

[0037] S1, when the wheel group of the vehicle passes through the first coil, triggering the flat plate type dynamic weighing system to start the speed measurement process, and acquiring the first vehicle induction signal generated by the induction flat plate when the wheel group passes through.

[0038] S2, when the wheel group of the vehicle leaves the second coil, triggering the end of the speed measurement process of the flat plate dynamic weighing system, and obtaining the second vehicle induction signal generated by the induction flat plate when the wheel group leaves.

[0039] S3, obtaining the vehicle induction data of other wheel groups of the vehicle according to the method of steps S1 and S2, and summarizing the vehicle induction data as vehicle total sensing data.

[0040] S4, generating a data graph with sensing voltage and time as coordinates according to the vehicle total sensing data.

[0041] For example, refer to Figure 3 , Figure 3 is a data graph of a dual-axle motor vehicle provided by an embodiment of the application, wherein the X-axis is the sensing voltage and the Y-axis is the time node.

[0042] S5, calculating the speed of the wheel group of the vehicle according to the width of the induction flat plate and the sampling frequency of the flat plate dynamic weighing system.

[0043] Further, in step S5, the time when the first vehicle induction signal is generated is defined as N1, the time when the second vehicle induction signal is generated is defined as N2, the width of the induction flat plate is defined as d, and the sampling frequency of the flat plate dynamic weighing system is defined as K, then the speed of the wheel group of the vehicle satisfies the following relationship (1):

[0044] V1=(K*d) / (N2-N1) (1).

[0045] S6, calculating the speed of other wheel groups of the vehicle according to the method of step S5, and obtaining the number of wheel groups according to the data graph, and calculating the average speed of the vehicle.

[0046] Further, the speed of other wheel groups of the vehicle includes at least V2, …, Vn, and the number of peaks on the inductance voltage coordinates in the data graph is n, then the average speed of the vehicle satisfies the following relationship (2):

[0047] V=(V1+V2+…+Vn) / n (2).

[0048] For example, in Figure 3 , the number of peaks on the inductance voltage coordinates is 2, which means that the vehicle collected this time is a dual-axle vehicle, and only two sets of wheel group data are needed to obtain the average speed. For multi-axle vehicles such as large trucks, the representation of the data graph will also be different, and only the time points when different wheel groups pass through the flat plate dynamic weighing system to generate voltage are needed to be obtained, and then the speed of any wheel group can be calculated according to the method of step S5, and the average speed of the multi-axle vehicle can be obtained.

[0049] For example, in Figure 3 In the example, the rear wheel speed of the vehicle is:

[0050] V2=(K*d) / (N4-N3).

[0051] The average speed is:

[0052] V=(V1+V2) / 2.

[0053] The beneficial technical effects achieved by the embodiments of the present invention are:

[0054] 1. The vehicle speed is calculated by calculating the speed of multiple wheel groups on the same vehicle and averaging the speed to restore the actual operating conditions of the vehicle to the greatest extent possible, reducing the error caused by uneven road surface, braking during the process, and vehicle body vibration;

[0055] 2. The speed analysis method using weighing data images can realize the speed of the vehicle when it passes through the flatbed area, eliminating missed measurements;

[0056] 3. It does not occupy the operating process of the speed measurement system. The entire speed measurement process can be carried out synchronously with the measurement of other vehicles, which improves work efficiency.

[0057] The embodiment of the present invention also provides a system for measuring the speed of a flat-plate dynamic weighing system for a vehicle, please refer to Figure 4 , Figure 4 2 is a schematic structural diagram of a system 200 for measuring the speed of a flat-plate dynamic weighing system for a vehicle provided by an embodiment of the present invention. The flat-plate dynamic weighing system includes a first coil, an induction plate, and a second coil. The system 200 for measuring the speed of a flat-plate dynamic weighing system for a vehicle specifically includes:

[0058] The first inductor unit 201 is used to trigger the flat-plate dynamic weighing system to start the speed measurement process when the wheel group of the vehicle passes by the first coil, and obtain the first vehicle induction signal generated by the induction plate when the wheel group passes by;

[0059] The second inductor unit 202 is used to trigger the flat-plate dynamic weighing system to end the speed measurement process when the wheels of the vehicle leave the second coil, and to obtain the second vehicle induction signal generated by the induction plate when the wheels leave;

[0060] An inductance unit 203 is configured to control the first inductance unit and the second inductance unit to obtain vehicle sensing data of other wheel groups of the vehicle and aggregate the data into total vehicle sensing data;

[0061] An image analysis unit 204 is configured to generate a data graph with sensor voltage and time as coordinates based on the total vehicle sensor data;

[0062] a wheel set speed calculation unit 205 configured to calculate the speed of the wheel set of the vehicle according to the width of the induction plate and the sampling frequency of the plate-type dynamic weighing system;

[0063] a mean speed calculation unit 206 configured to calculate the speed of the other wheel set of the vehicle according to the wheel set speed calculation unit 205, and calculate the average speed of the vehicle according to the data graph and the number of wheel sets.

[0064] The plate-type dynamic weighing system speed measurement system 200 for the vehicle can implement the steps in the plate-type dynamic weighing system speed measurement method for the vehicle in the above embodiment, and achieve the same technical effects. For details, refer to the description in the above embodiment, which will not be repeated here.

[0065] The embodiment of the present application also provides a computer device, please refer to Figure 5 , Figure 5 FIG. 1 is a structural schematic diagram of the computer device provided by the embodiment of the present application, and the computer device 300 comprises a memory 302, a processor 301, and a computer program stored in the memory 302 and capable of running on the processor 301.

[0066] The processor 301 invokes the computer program stored in the memory 302 to execute the steps in the plate-type dynamic weighing system speed measurement method for the vehicle provided by the embodiment of the present application. For details, refer to Figure 1 , and specifically comprises:

[0067] S1, when the wheel set of the vehicle passes through the first coil, triggering the plate-type dynamic weighing system to start the speed measurement process, and obtaining the first vehicle induction signal generated by the induction plate when the wheel set passes through;

[0068] S2, when the wheel set of the vehicle leaves the second coil, triggering the plate-type dynamic weighing system to end the speed measurement process, and obtaining the second vehicle induction signal generated by the induction plate when the wheel set leaves;

[0069] S3, obtaining the vehicle induction data of the other wheel set of the vehicle according to the method of steps S1 and S2, and summarizing the data as vehicle total sensing data;

[0070] S4, generating a data graph with sensing voltage and time as coordinates according to the vehicle total sensing data;

[0071] S5, calculating the speed of the wheel set of the vehicle according to the width of the induction plate and the sampling frequency of the plate-type dynamic weighing system;

[0072] S6, calculating the speed of the other wheel set of the vehicle according to the method of step S5, and calculating the average speed of the vehicle according to the data graph and the number of wheel sets.

[0073] Further, in step S5, define the time when the first vehicle induction signal is generated as N1, the time when the second vehicle induction signal is generated as N2, the width of the induction plate as d, and the sampling frequency of the plate-type dynamic weighing system as K, then the speed of the wheel group of the vehicle satisfies the following relation (1):

[0074] V1=(K*d) / (N2-N1) (1).

[0075] Further, define the speed of other wheel groups of the vehicle as at least V2, …, Vn, and the number of peaks on the coordinates of the inductance voltage in the data graph as n, then the average speed of the vehicle satisfies the following relation (2):

[0076] V=(V1+V2+…+Vn) / n (2).

[0077] The computer device 300 provided by the embodiment of the present application can realize the steps in the method for measuring the speed of the plate-type dynamic weighing system for the vehicle in the above embodiment, and can realize the same technical effects, and the description in the above embodiment is referred to herein and will not be repeated.

[0078] The embodiment of the present application further provides a computer readable storage medium, and the computer readable storage medium stores a computer program, the computer program is executed by a processor to realize each process and step in the method for measuring the speed of the plate-type dynamic weighing system for the vehicle provided by the embodiment of the present application, and can realize the same technical effects, to avoid repetition, which will not be repeated here.

[0079] Those skilled in the art can understand that all or part of the processes in the above embodiment method can be completed by a computer program to instruct related hardware, and the program can be stored in a computer readable storage medium, and when the program is executed, the processes of the above embodiments of the method can be included. The storage medium can be a magnetic disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM).

[0080] It should be noted that in this document, the terms "comprising", "including", or any other variant thereof are intended to cover non-exclusive inclusion, so that processes, methods, articles or devices including a series of elements not only include those elements, but also include other elements not explicitly listed, or include elements inherent to such processes, methods, articles or devices. Without more limitations, the element defined by the statement "including a" does not exclude the presence of additional identical elements in the process, method, article or device including the element.

[0081] Those skilled in the art can clearly understand the above-mentioned embodiment method can be realized by means of software and necessary general hardware platform, of course, also can be realized by hardware, but in many cases, the former is a better embodiment. Based on such understanding, the technical solutions of the present application essentially or say the part of contribution to the prior art can be embodied in the form of software product, the computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disc), including a plurality of instructions to make a terminal (may be a mobile phone, computer, server, air conditioner, or network equipment, etc.) executes the method described in various embodiments of the present application.

[0082] The above describes the embodiments of the present application in conjunction with the drawings, the disclosed is only the preferred embodiment of the present application, but the present application is not limited to the above-mentioned specific embodiments, the above-mentioned specific embodiments are only illustrative, but not limited, those skilled in the art can make many forms of equivalent changes without departing from the scope of the present application under the inspiration of the present application, and the claims of the present application.

Claims

1. A method for measuring the speed of a vehicle using a flat-plate dynamic weighing system, wherein the flat-plate dynamic weighing system comprises a first coil, an induction plate, and a second coil, wherein: The method comprises the following steps: S1. When the wheels of a vehicle pass through the first coil, the flat-plate dynamic weighing system is triggered to start the speed measurement process and obtain the first vehicle sensing signal generated by the sensing plate when the wheels pass through; S2. When the wheels of the vehicle leave the second coil, the flat-plate dynamic weighing system is triggered to end the speed measurement process and obtain the second vehicle sensing signal generated by the sensing plate when the wheels leave; S3. Acquire vehicle sensing data of other wheel sets of the vehicle according to the method of steps S1 and S2, and aggregate them into total vehicle sensing data; S4. generating a data graph with sensor voltage and time as coordinates according to the total vehicle sensor data; S5. Calculating the speed of the wheel set of the vehicle according to the width of the sensing plate and the sampling frequency of the flat-plate dynamic weighing system; S6. Calculate the speeds of the other wheel groups of the vehicle according to the method of step S5, obtain the number of wheel groups according to the data graph, and calculate and output the average speed of the vehicle; In step S5, the time when the first vehicle sensing signal is generated is defined as N1, the time when the second vehicle sensing signal is generated is defined as N2, the width of the sensing plate is defined as d, and the sampling frequency of the flat-plate dynamic weighing system is defined as K. Then, the speed of the wheel group of the vehicle satisfies the following relationship (1): V1=(K*d) / (N2-N1) (1); The speeds of the other wheel groups of the vehicle are defined to include at least V2, ..., Vn. The number of peaks on the coordinates of the inductor voltage in the data graph is n. Then, the average speed of the vehicle satisfies the following relationship (2): V=(V1+V2+…+Vn) / n (2).

2. A system for measuring the speed of a flat-plate dynamic weighing system for a vehicle, the flat-plate dynamic weighing system comprising a first coil, an induction plate, and a second coil, characterized in that: include: a first inductor unit, configured to trigger the flat-plate type dynamic weighing system to start a speed measurement process when the wheel set of the vehicle passes through the first coil, and to obtain a first vehicle induction signal generated by the induction plate when the wheel set passes through; a second inductor unit, configured to trigger the flat-plate dynamic weighing system to end the speed measurement process when the wheels of the vehicle leave the second coil, and to obtain a second vehicle induction signal generated by the induction plate when the wheels leave the second coil; an inductance unit, configured to control the first inductance unit and the second inductance unit to obtain vehicle sensing data of other wheel sets of the vehicle and aggregate the data into total vehicle sensing data; An image analysis unit, configured to generate a data graph with sensor voltage and time as coordinates based on the total vehicle sensor data; a wheel speed calculation unit, configured to calculate the speed of the vehicle's wheels according to the width of the sensing plate and the sampling frequency of the flat-plate dynamic weighing system; an average speed calculation unit, configured to calculate the speeds of other wheels of the vehicle according to the wheel speed calculation unit, obtain the number of wheels according to the data graph, and calculate and output the average speed of the vehicle; The wheel speed calculation unit is further used to define the time when the first vehicle sensing signal is generated as N1, the time when the second vehicle sensing signal is generated as N2, the width of the sensing plate as d, and the sampling frequency of the flat-plate dynamic weighing system as K. Then, the speed of the vehicle wheel satisfies the following relationship (1): V1=(K*d) / (N2-N1) (1); The speeds of the other wheel groups of the vehicle are defined to include at least V2, ..., Vn. The number of peaks on the coordinates of the inductor voltage in the data graph is n. Then, the average speed of the vehicle satisfies the following relationship (2): V=(V1+V2+…+Vn) / n (2).

3. A computer device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the steps of the method for measuring speed of a flat-plate dynamic weighing system for a vehicle as claimed in claim 1 are implemented.

4. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, and when the computer program is executed by the processor, the steps of the method for measuring speed of a flat-plate dynamic weighing system for a vehicle as claimed in claim 1 are implemented.

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