A shaft group type vehicle weighing detection method without shaft detection device

Abstract

The application discloses a kind of shaft group type vehicle weighing detection methods without shaft detection equipment, the method without shaft detection equipment, utilize weighing platform, light curtain and be broken into the combination of above-mentioned single shaft, double shaft, three shaft groups by axle flow, realize shaft group division immediate complete once weighing, realize the weighing of whole vehicle weight by the superposition of each shaft group weight, simultaneously realize the quick identification of vehicle type, can quickly judge the legality of vehicle load, simultaneously, can cancel the shaft identification sensor on hardware, not only reduce cost, but also can greatly reduce product failure rate;By being divided into 10 sections along the direction of travel of weighing platform, the identification of different area load, algorithm is simple and reliable, and its identification accuracy and efficiency are improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of dynamic weighing, and relates to a shaft group type vehicle weighing detection method, in particular to a shaft group type vehicle weighing detection method without shaft detection equipment, which can greatly improve the efficiency and accuracy of vehicle load legality judgment, reduce the cost and product failure rate. BACKGROUND

[0002] In the freight industry, the problem of truck overload has always been a serious problem. Overloaded vehicles not only increase the safety risk of drivers, but also have a negative impact on the damage of roads and bridges. Therefore, it is very important to accurately measure the load of trucks. At the same time, the upper limit of the load of different vehicle types is also clearly stipulated by the state, so the weight and vehicle type are extremely important for overload control work.

[0003] At present, the weighing equipment used in domestic highways mainly includes two types, one is static weighing equipment, and the other is dynamic weighing equipment. The static weighing equipment is a relatively traditional weighing method. The static detection equipment needs the vehicle to stop on the weighing platform, and uses the static detection principle to accurately weigh the total weight of the truck. The advantage of this weighing method is high precision, and it is suitable for weighing occasions with strict weight requirements. The dynamic weighing equipment uses the dynamic detection principle. When the vehicle dynamically drives through the weighing platform, the detection equipment dynamically monitors the driving state of the vehicle on the weighing platform, and obtains the total weight of the truck through weighing calculation. The advantage of this weighing method is fast measurement speed, and it is suitable for heavy traffic weighing occasions.

[0004] The axle load scale and the axle group scale are both dynamic weighing devices. The axle load scale weighs each axle of the vehicle respectively and then adds up the weight of each axle to obtain the total weight of the vehicle. Non-standard driving behavior can cause the instantaneous center of gravity of the vehicle to change, thereby reducing the total weight of the vehicle. In contrast, the axle group scale has a longer weighing platform and weighs each axle group as a unit, and then adds up the weight of each axle group to obtain the total weight of the vehicle. The axle group scale can more accurately reflect the total weight of the vehicle. Currently, the maximum number of axles of a highway freight vehicle is three (except for special transport vehicles). Because the weighing platform is longer, the axle group scale can completely realize the detection of three-axle freight vehicles. The influence of non-standard driving behavior of the vehicle on the change of the center of gravity can be completely eliminated by a reasonable algorithm. In terms of working principle and system structure, the axle group scale is a dynamic vehicle high-precision weighing method that monitors the axle dynamically and weighs the axle group. The axle group scale mainly consists of a weighing platform, a weighing sensor, a vehicle separator, an axle identification sensor and other components. The axle identification sensor is arranged at both ends of the axle group scale and is divided into an upper scale wheel axle identification sensor and a lower scale wheel axle identification sensor. The upper scale wheel axle identification sensor is arranged at the front end of the weighing platform and mainly completes the identification of the number of vehicle axles, the judgment of the axle type and the statistics of the number of axles entering the weighing platform. The lower scale wheel axle identification sensor is arranged at the rear end of the weighing platform and is mainly used to count the number of axles leaving the weighing platform. In addition, in order to identify the vehicle type, the axle identification sensor at both ends of the axle group scale is arranged at the front end or the rear end of the weighing sensor by each manufacturer. The multi-channel integrated sensor is arranged at a certain interval inside the sensor. The length of the sensor is set according to the width of the lane to ensure that only one tire of the vehicle is pressed above the sensor when the vehicle passes through. The number of tires is determined according to the number of sensors triggered by the tire, thereby determining the vehicle type. However, due to the road surface, non-standard driving, axle number statistics and inconsistent tire type, the recognition rate of this method is limited and cannot meet the national standard requirements.

[0005] To solve the above problems, Chinese invention patent CN201911228373.3 proposes a method for axle load measurement and axle type identification in a narrow strip weighing system. In this patent, a narrow strip sensor is installed to accurately identify the number of vehicle axles and the accurate axle load of each axle. Then, the time difference of the vehicle passing through the adjacent two sensors is calculated according to the pre-set distance between the narrow strip sensors. The weight information is fused by fuzzy identification algorithm to calculate the distance between each axle, achieving the purpose of accurate axle type identification. This method uses the time difference of two sensors to identify the axle type, but during dynamic measurement, sudden braking or sudden acceleration may occur, and the speed of the vehicle is not determined, which may cause inaccurate detection data. Chinese invention patent CN202211364965.X proposes a method and system for axle load measurement and axle type identification in a flat plate dynamic weighing system. The vehicle type is identified by calculating the wheelbase through waveform signals and image processing. The two different wheelbase calculation methods are compared to achieve the identification of the vehicle type. However, during waveform data collection, noise may be generated due to interference signals. The data processing requires a large amount of denoising calculation, and the axle number and wheelbase parameters including axle number database and wheelbase database need to be matched, which is a complicated process. In order to eliminate the inaccuracy of measurement, a large amount of complex denoising or correction operations are often required in the prior art.

[0006] In addition, it should be noted that the axle identification sensor installed at both ends of the axle group scale is an important component. Although it can identify the number of vehicle axles and wheelbase, it is of great significance to improve the weighing accuracy and working efficiency of the axle group scale. However, the use of axle identification sensor also brings some problems such as high cost (due to the use of advanced sensor technology and automatic identification algorithm, the cost of axle identification sensor is high, which leads to high cost of axle group scale), high product failure rate (the complex structure and high precision requirement of axle identification sensor make it prone to some failure problems during use. Especially in harsh weather conditions such as high temperature, low temperature, humidity or corrosive environment. These failures may cause measurement errors or data loss, affecting the accuracy of weighing results. These failures not only affect the weighing accuracy and stability, but also increase the maintenance cost and reduce the working efficiency). SUMMARY

[0007] (I) Invention purpose

[0008] The present application is to avoid the shortcomings of the prior art, provide a shaft group type vehicle weighing detection method without shaft detection equipment, realize shaft group division on the basis of without shaft detection equipment, use the weighing platform and vertical plane light curtain to disconnect the vehicle shaft flow into the combination of single shaft, double shaft and three shaft, no matter which shaft group is captured, complete the weighing immediately, and then recursively to the initial state, realize the weighing of the whole vehicle weight through the superposition of the weight of each shaft group, realize the rapid identification of the vehicle type, improve the efficiency and accuracy of the vehicle load legality judgment, reduce the cost, and greatly reduce the product failure rate.

[0009] (II) Technical scheme

[0010] To achieve the purpose of the present application and solve the technical problems, the present application adopts the following technical scheme:

[0011] A shaft group type vehicle weighing detection method without shaft detection equipment, characterized in that the method comprises the following steps:

[0012] SS1. A vehicle separator arranged in the width direction of the weighing platform is arranged at the vehicle entering end of the weighing platform, and the vehicle separator forms a vertical plane light curtain perpendicular to the driving direction at the vehicle entering end of the weighing platform;

[0013] SS2. The weighing platform is divided into 10 sections along the driving direction, and the starting points of each section are respectively marked as S00, S04, S08, S12, S16, S20, S24, S28, S32 and S36, wherein S00 is the upper scale boundary of the weighing platform, S16 is about 1.6 meters away from the upper scale boundary, S20 is about 2.0 meters away from the upper scale boundary, S32 is about 3.2 meters away from the upper scale boundary, S36 is about 3.6 meters away from the upper scale boundary, and S20 is located at the center of the weighing platform, and a plurality of load sensors corresponding to each section are arranged on the weighing platform along the driving direction to realize the judgment of whether there is load in each section;

[0014] SS3. The vehicle is divided into single shaft, double shaft and three shaft according to the shaft type, and the vehicle type with the distance between the adjacent two shafts greater than 1.8 meters is regarded as a single shaft vehicle type, the vehicle type with the distance between the adjacent two shafts greater than 1.5 meters and less than 1.8 meters is regarded as a double shaft vehicle type, and the vehicle type with the distance between the adjacent two shafts not more than 1.5 meters is regarded as a three shaft vehicle type, and when the vehicle is determined to be a single shaft, double shaft or three shaft vehicle type according to the distance between the shafts, the weighing platform weighs the axle load of the single shaft, double shaft or three shaft respectively;

[0015] SS4. Set the string encoding rule of the vehicle type code

[0016] The axle type is encoded as "1" for a single axle with one tire on each side, "2" for a single axle with two tires on each side, "3" for a double axle with one tire on each side, "4" for a double axle with one tire on each side and the other with two tires on each side, "5" for a double axle with two tires on each side, "6" for a triple axle with one tire on each side, and "7" for a triple axle with two tires on each side. The vehicle model is then encoded using a string based on the axle type of each axle, and the encoding is performed from front to back to form the vehicle model code string.

[0017] SS5. Algorithm Starting Point

[0018] First, the weighing platform is unloaded and waits for a vehicle to enter. The state where no vehicle enters the weighing control area of ​​the weighing platform is taken as the starting point of the algorithm. At this time, all weighing-related equipment is idle and waiting for the first vehicle to enter. When the vehicle enters and blocks the facade light curtain, and the first axle completely enters the weighing platform along the driving direction, the algorithm starts and the initial vehicle model code value is set to empty.

[0019] SS6 Weighing Processing Cycle

[0020] If the facade light curtain has no end, the vehicle continues to move and proceeds to step SS7 for axle following; if the facade light curtain has an end, the axle weight is added to form the total vehicle weight, and the vehicle proceeds to step SS9 for legality check.

[0021] SS7. Shaft Adhesion

[0022] Depending on the actual vehicle model, the following three cases should be considered when handling axle alignment:

[0023] SS7.1. Continue until only the first axle is unloaded from the weighing platform. At this point, one weighing process is completed, the vehicle model code string is incremented by "2", and the process recursively returns to step SS6 to perform the weighing process loop.

[0024] SS7.2. Before the first axle reaches point S20, the second axle is installed, and the process proceeds to step SS8 for coupling weighing.

[0025] SS7.3. After the first axle passes S20, the second axle comes up. At this time, the first weighing process is completed, and "2" is added to the end of the vehicle model code string. The second axle becomes the new first axle, and the vehicle continues to move forward. After the original first axle goes off the weighing platform, the process recursively returns to step SS6 to perform the weighing process loop.

[0026] SS8. Coupling Weighing Process

[0027] After the second axle is weighed, the first two axles are weighed in advance, and the third axle is weighed on the weighing platform before the first axle reaches S32, and the three axles are handled as a whole, and the weighing is performed once when the three axles are all on the weighing platform, and the weighing result is taken as the three-axle load weighing result, and the vehicle model code is added with "7" at the end;

[0028] If no new axle is weighed on the weighing platform before the first axle reaches S32, the weighing is continued until the first axle reaches S36, and the weighing result is taken as the two-axle load weighing result, and the vehicle model code is added with "5" at the end;

[0029] The vehicle continues to travel, and the subsequent axles are taken as new first axles, and the process is recursively performed to SS6 after the axles are all weighed off;

[0030] SS9. Legality check

[0031] When the axle type code "2" appears at the beginning of the vehicle model code string, it is replaced with "1", and when the axle type code "5" appears at the beginning of the vehicle model code string, it is replaced with "11", and the processing of a vehicle model code is completed.

[0032] When the vertical light curtain is closed, the weights of the axle groups are accumulated to form the overall vehicle weight, and the vehicle load legality check is performed in combination with the vehicle model code and the overall vehicle weight.

[0033] Further, the vehicle separator is an infrared vehicle separator, which comprises an infrared emitter group and an infrared receiver group arranged in the width direction of the weighing platform and respectively erected on both sides of the vehicle entry end, and the infrared emitter group and the infrared receiver group are oppositely arranged and form a vertical light curtain perpendicular to the driving direction, so as to realize the separation of the vehicle and provide the weighing start and end signals.

[0034] Further, in step SS2, the width of each area is about 40 cm.

[0035] Further, the number after the letter "S" is the minimum distance of the area from the upper boundary of the weighing platform.

[0036] Further, when each axle is weighed on and off the weighing platform, the load of the corresponding sensor will present a regular change.

[0037] Further, in step SS2, the load sensors are arranged in two rows along the driving direction.

[0038] (Three) Technical effects

[0039] Compared with the prior art, the axle group type vehicle weighing detection method without axle detection equipment of the present application at least has the following remarkable technical effects:

[0040] (1) The axle group type vehicle weighing detection method without axle detection equipment of the present application realizes axle group division on the basis of not needing axle detection equipment, uses a weighing platform and a vertical plane light curtain to separate the axle flow into the combination of single axle, two-axle group and three-axle group, completes a weighing immediately no matter which axle group is captured, recurs to the initial state immediately, realizes the weighing of the whole vehicle weight through the superposition of the weight of each axle group, realizes the rapid identification of the vehicle type, and can rapidly judge the legality of the vehicle load;

[0041] (2) The axle group type vehicle weighing detection method without axle detection equipment of the present application can cancel the axle identification sensor on the hardware, not only reduces the cost, but also greatly reduces the product failure rate;

[0042] (3) The axle group type vehicle weighing detection method without axle detection equipment of the present application divides the weighing platform into 10 sections along the driving direction, identifies the load in different areas, compared with the traditional sensor which needs to identify and record the waveform, speed, time and other information, the sensor of the present application only needs to identify whether there is load on the corresponding area, the algorithm is simple and reliable, and the identification accuracy and efficiency are improved;

[0043] (4) The axle group type vehicle weighing detection method without axle detection equipment of the present application greatly improves the efficiency and accuracy of the judgment of the legality of the vehicle load, reduces the cost and the product failure rate. BRIEF DESCRIPTION OF DRAWINGS

[0044] Figure 1 It is an implementation flowchart of the axle group type vehicle weighing detection method without axle detection equipment of the present application. DETAILED DESCRIPTION

[0045] In order to better understand the present application, the content of the present application will be further illustrated below in combination with embodiments, so that the advantages and features of the present application can be more easily understood by those skilled in the art. It should be noted that the following description is only a preferred embodiment of the present application, but the content of the present application is not limited to the following embodiments. In fact, various modifications and changes can be made in the present application without departing from the scope or spirit of the present application, which will be obvious to those skilled in the art. For example, the features shown or described as part of one embodiment can be used with another embodiment to produce yet another embodiment. Therefore, it is intended that the present application include such modifications and changes within the scope of the appended claims and their equivalents.

[0046] As Figure 1 shown, the present application provides a vehicle weighing detection method without axle detection equipment, which comprises at least the following steps when implemented:

[0047] SS1. A vehicle separator arranged in the width direction of the weighing platform is arranged at the vehicle entry end of the weighing platform, and the vehicle separator forms a vertical light curtain perpendicular to the driving direction at the vehicle entry end of the weighing platform; in the preferred example of the present application, the vehicle separator is an infrared vehicle separator, which comprises an infrared emitter group and an infrared receiver group arranged in the width direction of the weighing platform and respectively erected at both sides of the vehicle entry end, and the infrared emitter group and the infrared receiver group are oppositely arranged and form a vertical light curtain perpendicular to the driving direction, so as to separate the vehicles and provide the weighing start and end signals.

[0048] SS2. The weighing platform is divided into 10 sections along the driving direction, and the starting points of the sections are respectively marked as S00, S04, S08, S12, S16, S20, S24, S28, S32 and S36, wherein S00 is the upper scale boundary of the weighing platform, S16 is about 1.6 meters away from the upper scale boundary, S20 is about 2.0 meters away from the upper scale boundary, S32 is about 3.2 meters away from the upper scale boundary, and S36 is about 3.6 meters away from the upper scale boundary, S20 is located at the approximate center of the weighing platform, and a plurality of load sensors are arranged on the weighing platform along the driving direction and correspond to the sections respectively, so as to determine whether there is a load in each section; each section has an approximate width of 40 cm, and the number after the letter "S" is the minimum distance of the section from the upper scale boundary.

[0049] SS3. The vehicle is divided into single-axle, double-axle and triple-axle according to the axle type, and the vehicle type with an axle distance between adjacent two axles greater than 1.8 meters is regarded as a single-axle vehicle type, the vehicle type with an axle distance between adjacent two axles greater than 1.5 meters and less than 1.8 meters is regarded as a double-axle vehicle type, and the vehicle type with an axle distance between adjacent two axles not more than 1.5 meters is regarded as a triple-axle vehicle type, and the weighing platform weighs the axle load of the single-axle, double-axle or triple-axle respectively when the vehicle is determined to be a single-axle, double-axle or triple-axle vehicle according to the axle distance;

[0050] SS4. String encoding rule of vehicle type code

[0051] The axle type of single-axle single tire on each side is encoded as "1", the axle type of single-axle double tires on each side is encoded as "2", the axle type of double-axle single tire on each side is encoded as "3", the axle type of double-axle single tire on one side and double tires on the other side is encoded as "4", the axle type of double-axle double tires on each side is encoded as "5", the axle type of triple-axle single tire on each side is encoded as "6", and the axle type of triple-axle double tires on each side is encoded as "7"; the string code of the vehicle type is encoded according to the axle type of each axle of the vehicle from front to back, and the vehicle type code string is formed by encoding in the order from front to back;

[0052] SS5. Algorithm starting point

[0053] Firstly, the weighing platform is empty, waiting for the vehicle to enter, and the weighing control area of the weighing platform is empty without any vehicle entering. At this moment, all weighing-related devices are in idle state, waiting for the first vehicle to enter. When the entering vehicle blocks the facade light curtain and the first axle is completely on the weighing platform in the driving direction, the algorithm process starts, and the initial vehicle type code value is set to empty;

[0054] SS6 weighing processing cycle

[0055] If the facade light curtain is not closed, as the vehicle continues to travel, go to step SS7 for axle following processing; if the facade light curtain is closed, accumulate the axle weight to form the whole vehicle weight, and go to step SS9 for legality check;

[0056] SS7. Axle following processing

[0057] According to the actual vehicle type, the axle following processing is divided into at least the following three cases:

[0058] SS7.1. Only the first axle is on the weighing platform until the weighing platform is unloaded, at this time, complete a weighing processing, the vehicle type code string is added with "2", and the process recurs to step SS6 for weighing processing cycle;

[0059] SS7.2. The second axle is on before the first axle reaches S20, go to step SS8 for axle following processing;

[0060] SS7.3. The second axle is on after the first axle exceeds S20, at this time, the first weighing processing is completed, the vehicle type code string is added with "2", the second axle is taken as the new first axle, the vehicle continues to travel, and after the original first axle is unloaded from the weighing platform, the process recurs to step SS6 for weighing processing cycle;

[0061] SS8. Axle following processing

[0062] After the second axle is on the scale, the double-axle pre-weighing is performed first. If new axles are added on the weighing platform before the first axle reaches S32, the triple-axle processing is performed. When the triple axles are all on the weighing platform, the weighing is performed once, which is taken as the triple-axle load weighing result, and the vehicle type code is added with "7". If no new axle is added on the weighing platform before the first axle reaches S32, the weighing is continued until the first axle reaches S36 position, at this time, the weighing result is the two-axle load weighing result, and the vehicle type code is added with "5". The vehicle continues to travel, and the subsequent axles are taken as the new first axles. After the above axles are all unloaded, the process recurs to SS6;

[0063] SS9. Legality check

[0064] When the axle type code "2" appears at the beginning of the vehicle type code string, it is replaced by "1", and when the axle type code "5" appears at the beginning of the vehicle type code string, it is replaced by "11", completing the processing of a vehicle type code; after the vertical light curtain ends, the weights of each axle group are accumulated to form the overall vehicle weight, and the vehicle load legality is checked in combination with the vehicle type code and the overall vehicle weight.

[0065] The present application divides the axle groups without the need for an axle detection device, uses a weighing platform and a light curtain to separate the vehicle axle flow into the above-mentioned single axle, two-axle group and three-axle group, no matter which axle group is captured, a weighing is immediately completed, and then recursion is performed to the initial state, the overall vehicle weight is weighed through the superposition of the weights of each axle group, the vehicle type is quickly identified, the vehicle load legality can be quickly judged, and at the same time, the axle identification sensor can be cancelled on the hardware, which not only reduces the cost, but also greatly reduces the product failure rate; the weighing platform is divided into 10 sections along the driving direction, the load in different areas is identified, compared with the traditional sensor which needs to identify and record waveform, speed, time and other information, the sensor of the present application only needs to identify whether there is load on the corresponding area, the algorithm is simple and reliable, and the identification accuracy and efficiency are improved. Therefore, the present application greatly improves the efficiency and accuracy of the judgment of the vehicle load legality, reduces the cost, and greatly reduces the product failure rate.

[0066] Through the above embodiments, the purpose of the present application is completely effectively achieved. Any equivalent or simple change made according to the structure, features and principles described in the patent concept of the present application is included in the protection scope of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or use similar ways to replace, as long as the structure does not deviate from the present application or exceeds the scope defined by the present claims, which should belong to the protection scope of the present application.

Claims

1. A method for weighing and detecting axle-group vehicles without the need for axle detection equipment, characterized in that... The method includes at least the following steps: SS1. A vehicle separator is provided at the vehicle entry end of the weighing platform, arranged in the width direction of the weighing platform. The vehicle separator is an infrared vehicle separator, including an infrared transmitter group and an infrared receiver group arranged in the width direction of the weighing platform and respectively erected on both sides of the vehicle entry end. The infrared transmitter group and the infrared receiver group are arranged opposite to each other and form a vertical light curtain perpendicular to the driving direction at the vehicle entry end of the weighing platform to realize vehicle separation and provide weighing start and end signals. SS2. The weighing platform is divided into 10 segments along the travel direction. The starting points of each area are denoted as S00, S04, S08, S12, S16, S20, S24, S28, S32, and S36, respectively. S00 is the upper boundary of the weighing platform, S16 is 1.6 meters away from the upper boundary, S20 is 2.0 meters away from the upper boundary, S32 is 3.2 meters away from the upper boundary, S36 is 3.6 meters away from the upper boundary, and S20 is located at the center of the weighing platform. Several load sensors are arranged along the travel direction on the weighing platform and correspond one-to-one with each area. The load sensors are arranged in two rows along the travel direction to determine whether there is a load in each area. When each axle moves up and down the weighing platform, the load of the corresponding sensor will show a regular change. SS3. Vehicles are classified into single-axle, double-axle, and triple-axle types based on their axle configuration. Vehicles with a wheelbase greater than 1.8 meters between adjacent axles are considered single-axle vehicles, vehicles with a wheelbase greater than 1.5 meters but less than 1.8 meters between adjacent axles are considered double-axle vehicles, and vehicles with a wheelbase less than 1.5 meters between adjacent axles are considered triple-axle vehicles. When a vehicle is classified as a single-axle, double-axle, or triple-axle vehicle based on its wheelbase, the weighing platform weighs the axle load of each type of vehicle separately. SS4. Set the string encoding rules for vehicle model codes The axle type is encoded as "1" for a single axle with one tire on each side, "2" for a single axle with two tires on each side, "3" for a double axle with one tire on each side, "4" for a double axle with one tire on each side and the other with two tires on each side, "5" for a double axle with one tire on each side, "6" for a triple axle with one tire on each side, and "7" for a triple axle with two tires on each side. The vehicle model is then encoded using a string based on the axle type of each axle, front and rear, in a front-to-back order to form the vehicle model code string. SS5. Algorithm Starting Point First, the weighing platform is unloaded and waits for a vehicle to enter. The state where no vehicle enters the weighing control area of ​​the weighing platform is taken as the starting point of the algorithm. At this time, all weighing-related equipment is idle and waiting for the first vehicle to enter. When the vehicle enters and blocks the facade light curtain, and the first axle completely enters the weighing platform along the driving direction, the algorithm starts and the initial vehicle model code value is set to empty. SS6 Weighing Processing Cycle If the facade light curtain has no end, the vehicle continues to move and proceeds to step SS7 for axle following; if the facade light curtain has an end, the axle weight is added to form the total vehicle weight, and the vehicle proceeds to step SS9 for legality check. SS7. Shaft Adhesion Depending on the actual vehicle model, the following three cases should be considered when handling axle alignment: SS7.

1. Continue until only the first axle is unloaded from the weighing platform. At this point, one weighing process is completed, the vehicle model code string is incremented by "2", and the process recursively returns to step SS6 to perform the weighing process loop. SS7.

2. Before the first axle reaches point S20, the second axle is installed, and the process proceeds to step SS8 for coupling weighing. SS7.

3. After the first axle passes S20, the second axle comes up. At this time, the first weighing process is completed, and "2" is added to the end of the vehicle model code string. The second axle becomes the new first axle, and the vehicle continues to move forward. After the original first axle goes off the weighing platform, the process recursively returns to step SS6 to perform the weighing process loop. SS8. Coupling Weighing Process After the second axle is put on the scale, it is pre-weighed as a double axle. If a new axle is added to the weighing platform before the first axle reaches S32, it is treated as a triple axle. When all three axles are on the weighing platform, a weighing is performed. The result of the triple axle load weighing is used as the vehicle model code. "7" is added to the end of the vehicle model code. If there is no new weighing platform on the axle before the first axle reaches S32, continue weighing until the first axle reaches position S36. At this time, the weighing result is the weighing result of the two axle loads, and "5" is added to the end of the vehicle model code. The vehicle continues to move forward, and the next axle becomes the new first axle. After all the above couplings are removed from the scale, the process recursively returns to SS6. SS9. Legality Check When the axle type code "2" appears at the beginning of the vehicle model code string, it is replaced with "1". When the axle type code "5" appears at the beginning of the vehicle model code string, it is replaced with "11", thus completing the processing of one vehicle model code. After the facade light curtain is completed, the weight of each axle group is added together to form the total vehicle weight. The vehicle load legality is then checked by combining the vehicle model code and the total vehicle weight.

2. The axle group vehicle weighing and detection method without axle detection equipment according to claim 1, characterized in that, In step SS2, each area is 40cm wide.

3. The axle group vehicle weighing and detection method without axle detection equipment according to claim 2, characterized in that, The number following the letter "S" indicates the minimum distance from the area to the boundary of the weighing scale.

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