CN102759393B - Dynamic complete-vehicle-type automatic weighing system and method - Google Patents

Abstract

The invention discloses a dynamic vehicle-type automatic weighing system, comprising: an upper weighing platform, a middle weighing platform, a lower weighing platform and a plurality of weighing platforms located between the upper weighing platform, the middle weighing platform and the lower weighing platform Auxiliary weighing platform, used to carry the vehicles to be weighed passing by; arranged in the direction of driving, the upper weighing platform, several of the multiple auxiliary weighing platforms, the middle weighing platform, the remaining several of the multiple auxiliary weighing platforms, The lower weighing platform; the upper weighing platform is used to calculate the number of axles of the weighed vehicle when it is on the scale, the lower weighing platform is used to calculate the axle number of the weighed vehicle when it is lowered, and the middle weighing platform is used to separate the scales Vehicles on the platform; multiple sets of weighing sensors are respectively arranged on the upper weighing platform, the middle weighing platform, the lower weighing platform and multiple auxiliary weighing platforms, and are used to collect the axle load signals of each axle of the vehicle being weighed; and The weighing data processor is used for receiving axle load signals, and generating axle load data and axle driving state data of the vehicle under test according to the axle load signals.

Description

A dynamic vehicle-type automatic weighing system and method

technical field

The invention relates to the field of intelligent transportation, in particular to vehicle weighing technology in the field of intelligent transportation, and specifically to a dynamic vehicle-type automatic weighing system and method.

Background technique

At present, the vehicle dynamic weighing system is widely used in the weighing systems of freight vehicles such as expressway toll stations, over-limit detection stations, mines and ports, and plays an important role in traffic management, over-limit control and import and export supervision. At the same time, with the continuous development of the weighing industry, users have higher and higher requirements for weighing products. The existing dynamic and static weighing products can no longer fully meet the requirements of users.

Weighing by weight toll and over-limit detection is mainly achieved by using a single bent plate type, platform-type axle load scale or a static truck scale with a large platform for weighing the whole vehicle. With the mass use and promotion in recent years, axle load scales and static truck scales have exposed obvious deficiencies and defects:

(1) The currently used axle load scales all use the method of collecting axle loads and then adding up to calculate the total weight. When the axles pass through the axle load scale in turn, the weight of each axle is weighed, and the sum of each axle is calculated after passing through completely. Weight, the weighing accuracy is within ±2.5% (within 15KM per hour). However, when the center of gravity of the vehicle is shifted, the obtained axle load has a large deviation, which leads to a large deviation between the summed total weight and the actual weight of the vehicle. According to the characteristics of dynamic weighing of weighing equipment, more and more drivers resort to non-standard weighing and cheating to reduce the actual total weight of vehicles and goods, so as to achieve the purpose of evading vehicle tolls.

(2) In practical applications, the site where the vehicle is weighed is often in a complex condition. Vehicles usually wait in line for weighing, payment and unloading. The wheels of the vehicle may randomly stop, start or reverse on the weighing platform. If Failure to accurately identify the reversing vehicle will result in wrong dynamic weighing information.

(3) Some existing toll stations use static scales to make up for the shortcomings of axle load scales to achieve static weighing. Figure 1 is a waveform diagram collected by a sensor matched with a static weighing truck scale, where the ordinate represents the weight of the vehicle weighed by the static weighing truck scale, and the abscissa represents time. Combining with Figure 1, it can be seen that static weighing can only obtain the summed weight of all sensors. When the weight on the scale decreases, it is impossible to judge whether the vehicle is reversing or getting off the scale. Therefore, the static truck scale can only adopt the method of one car and one scale. In addition, the static scale cannot accurately identify the number of axles and model of the vehicle, and requires the support of an external device tire type recognizer. In the event of missing axles or multiple axles, re-weighing is required. It can be seen that the biggest disadvantage of static weighing is: the static scale can only calculate the total weight and cannot calculate the single axis, and the vehicle behind can only wait for the vehicle in front to get off the scale completely before loading on the scale. The traffic efficiency is low and the traffic speed is slow. It is easy to cause traffic jams.

Based on the deficiencies of the above-mentioned axle load scales and static weighing truck scales, there is currently a system that uses dynamic weighing truck scales for weighing measurement. It is a large dynamic scale that is spliced by four weighing platforms. There are two sets of load cells installed, and a set of load cells is shared at the joint of the two weighing platforms. There are 5 sets of sensors to collect the axle load signal of the vehicle under test. FIG. 2 is a waveform diagram collected by a sensor of the existing dynamic weighing scale. It can be seen from Figure 2 that through the signals of each group of sensors on the weighing platform, the number of axles on the vehicle scale, the axle load and the axle number of the vehicle under the scale can be calculated. The weight on the heavy platform, so as to realize that when multiple vehicles are on the scale, the weight of the vehicle in front can also be roughly calculated by subtracting the weight of the vehicle in front on the scale from the total weight on the weighing platform, so as to realize the dynamic passing of vehicles. One weighs more than one car. However, because the lengths of the four weighing platforms of this dynamic large scale are all greater than 5 meters, in the actual passing process, due to the influence of factors such as the slope of the on-site lane, when the distance between the front and rear vehicles is small, the axle load of the vehicle cannot be accurate, resulting in It is not possible to accurately calculate the total weight of the rear vehicle.

Therefore, current weighing products cannot fully meet the requirements of current and future owners and markets in terms of accuracy and high efficiency. Therefore, it is urgent to design a dynamic vehicle-type automatic weighing dynamic large scale that not only has the high precision of the static scale, but also can maintain the high efficiency and high accuracy of the dynamic scale.

Contents of the invention

The purpose of the present invention is to provide a dynamic vehicle-type automatic weighing system and method to overcome the problem of low dynamic weighing accuracy existing in the prior art.

In order to achieve the above purpose, the embodiment of the present invention discloses a dynamic vehicle-type automatic weighing system, which includes: an upper weighing platform, a middle weighing platform, a lower weighing platform, and , a plurality of auxiliary weighing platforms between the lower weighing platforms, used to carry the vehicles to be weighed passing by; arranged in the direction of driving, followed by the upper weighing platform, several of the plurality of auxiliary weighing platforms, The intermediate weighing platform, the remaining ones of the plurality of auxiliary weighing platforms, and the lower weighing platform; wherein the upper weighing platform is used to calculate the number of axles of the weighed vehicle when it is on the scale, so The lower weighing platform is used to calculate the number of axles of the weighed vehicle when it is under weighing, and the middle weighing platform is used to separate the vehicles on the weighing platform; multiple groups of load cells are respectively arranged on the upper weighing platform , the intermediate weighing platform, the lower weighing platform and multiple auxiliary weighing platforms, used to collect the axle load signals of each axle of the vehicle being weighed; and a weighing data processor, used to receive the axle load signals, and Axle load data and axle driving state data of the measured vehicle are generated according to the axle load signal.

In order to achieve the above purpose, the embodiment of the present invention also discloses a dynamic vehicle-type automatic weighing method, including: dividing the dynamic vehicle-type weighing platform into upper weighing platform, middle weighing platform, lower weighing platform and A plurality of auxiliary weighing platforms located between the upper weighing platform, the middle weighing platform, and the lower weighing platform to carry the vehicles to be weighed passing by; when the vehicle to be weighed is driving past the dynamic vehicle When using the weighing platform, the upper weighing platform calculates the number of axles of the weighed vehicle when it is on the scale, the lower weighing platform calculates the axle number of the weighed vehicle when it is off the scale, and the intermediate scale Platform separates the vehicle on the weighing platform; when the vehicle to be weighed passes through the dynamic vehicle-type weighing platform, it processes the upper weighing platform, the middle weighing platform, the lower weighing platform and multiple Axle load signals of each axle of the weighed vehicle collected by multiple groups of load cells on the auxiliary weighing platform are used to generate axle load data and axle driving state data of the measured vehicle.

The dynamic vehicle-type automatic weighing system and method of the embodiment of the present invention adopts the overlapping mode of the upper weighing platform, the middle weighing platform, the lower weighing platform and the auxiliary weighing platform. , it can ensure that each vehicle to be tested has one and only one axis on the same platform when it passes the main weighing platform (the upper weighing platform, the middle weighing platform is the lower weighing platform), so the number of axes of the vehicle's upper and lower scales can be correctly identified , and can accurately track the driving position of each vehicle on the scale, distribute its weight on the dynamic large scale, accurately distinguish them, realize the separation of multi-vehicle data and accurately calculate the weight of each vehicle, thus Improved weighing accuracy.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings on the premise of not paying creative efforts.

Fig. 1 is the oscillogram that utilizes the sensor that matches with existing static weighing truck scale to gather;

Fig. 2 is the oscillogram collected by the sensor of existing a kind of dynamic weighing scale;

Fig. 3 is the structural representation of the dynamic large scale in the dynamic vehicle-type automatic weighing system of the embodiment of the present invention;

Fig. 4 is the structural representation of an embodiment of the dynamic whole vehicle type automatic weighing system of the present invention;

Fig. 5 is the structural representation of another embodiment of the dynamic whole vehicle type automatic weighing system of the present invention;

Fig. 6 is the structural representation of the weighing data processor in the embodiment shown in Fig. 5;

Fig. 7 is a schematic structural diagram of a data processing unit in the embodiment shown in Fig. 6;

Fig. 8 is a layout scheme diagram of a specific embodiment of the dynamic large scale in the dynamic vehicle-type automatic weighing system of the present invention;

Fig. 9 is a specific example of a dynamic vehicle-type automatic weighing system composed of the dynamic large scale shown in Fig. 8 and the weighing data processor, coil, axle, grating and digital junction box shown in Fig. 4-7. The structural representation of embodiment;

Fig. 10 is a flow chart of a method for weighing a vehicle using the dynamic vehicle-type automatic weighing system shown in Fig. 9;

Fig. 11 is the oscillogram of a single weighed vehicle with two axes collected by the dynamic vehicle-type automatic weighing system shown in Fig. 9 on the scale;

FIG. 12 is a waveform diagram of two vehicles with two axles on the scale at the same time collected by the dynamic vehicle-type automatic weighing system shown in FIG. 9 .

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In the embodiment of the present invention, the dynamic vehicle-type automatic weighing system includes: a dynamic large scale 101, as shown in Figure 3, which includes: an upper weighing platform 1, an intermediate weighing platform 2, a lower weighing platform 3, and A plurality of auxiliary weighing platforms 4 and 5 between the upper weighing platform 1, the middle weighing platform 2, and the lower weighing platform 3 are used to carry the vehicles to be weighed passing by; Weighing platform 1 , several 4 of the plurality of auxiliary weighing platforms, the middle weighing platform 2 , remaining several 5 of the plurality of auxiliary weighing platforms and the lower weighing platform 3 .

In this embodiment, although there are two auxiliary weighing platforms 4 and 5 shown in FIG. 3 , they are not limited to two, which are determined according to the length of the auxiliary weighing platforms. In one embodiment, as shown in FIG. 3 , the distance between the middle weighing platform and the upper weighing platform is equal to the distance between the middle weighing platform and the lower weighing platform, and the distance between the middle weighing platform and the lower weighing platform is equal. The number of auxiliary weighing platforms between the upper weighing platform and the middle weighing platform is the same as the number of auxiliary weighing platforms between the lower weighing platform and the middle weighing platform. Usually, the length of the upper weighing platform, the middle weighing platform and the lower weighing platform is the same, and the length of the auxiliary weighing platform is 4-5 times of the length of the upper weighing platform, the middle weighing platform or the lower weighing platform . For example, in one embodiment, the lengths of the upper weighing platform, the middle weighing platform and the lower weighing platform are all 1 meter, so the length of the auxiliary weighing platform is 4.5 meters, and between the upper weighing platform and the middle weighing platform there is Two auxiliary weighing platforms, there are two auxiliary weighing platforms between the middle weighing platform and the lower weighing platform, and the total length of the entire dynamic large scale is 21 meters.

Wherein, the weighing platform 1 for weighing is used for calculating the number of axles of the vehicle being weighed when it is on the scale, and the weighing platform 3 for weighing is used for calculating the number of axles for the vehicle being weighed when it is being weighed. The intermediate weighing platform 2 is used to separate the vehicles on the weighing platform.

In this embodiment, as shown in Figure 4, in addition to the dynamic large scale 101 shown in Figure 3, the dynamic vehicle-type automatic weighing system also includes multiple groups of load cells 102, as shown in the circles in Figure 4, respectively It is arranged on the upper weighing platform 1, the middle weighing platform 2, the lower weighing platform 3 and a plurality of auxiliary weighing platforms 4 and 5, and is used to collect the axle load signals of each axle of the vehicle being weighed. Each group of sensors The collected axle load information of each axle includes dynamic tire pressure data; and the weighing data processor 103 is configured to receive the axle load signal and generate the vehicle under test according to the axle load signal. Axle load data and axle travel status data.

In this embodiment, as shown in FIG. 5 , the dynamic vehicle-type automatic weighing system further includes: a digital junction box 104 connected between the multiple groups of load cells 102 and the weighing data processor 103 time, used to transmit the data collected by the multiple groups of load cells 102 to the load data processor 103 . The coil 105 is connected to the digital junction box 104, and is used to detect the arrival of the weighed vehicle, generate a weighing measurement trigger signal, and send it to the weighing data processing unit 103 through the digital junction box 104; the axle 106, Connect the digital junction box 104 to detect the shaft type of each axle of the weighed vehicle, generate shaft type signals, and send them to the weighing data processing unit 103 through the digital junction box 104; the grating 107 is connected to the The digital junction box 104 is used to detect the presence of the vehicle to be weighed, generate an ending signal, and send it to the weighing data processing unit 103 through the digital junction box 104 .

In this embodiment, as shown in FIG. 6 , the weighing data processor 103 includes: a data acquisition unit 1031 configured to transmit signals from the multiple groups of load cells 102 , coils 105 , axles 106 and gratings 107 Collecting; the data processing unit 1032 is used to process the multiple signals collected by the data collecting unit 1031 to generate axle load information, axle speed information, wheelbase information, axle type information and Vehicle driving state information; the data interaction unit 1033 is used to store various information generated by the data processing unit 1032 and send it to the host computer for data interaction with the outside world.

In this embodiment, as shown in FIG. 7, the data processing unit 1032 in FIG. 6 includes: a vehicle driving state information acquisition unit 10321, configured to determine the The driving direction of the weighing vehicle; the axle information calculation unit 10322 is used to calculate the axle load information, axle speed information and wheelbase information according to the axle load information; the vehicle information storage unit 10323 is used to store the weighed Vehicle driving status information, axle load information, axle speed information, wheelbase information and other information of heavy vehicles. If the vehicle is traveling in the forward direction, the axle information calculation unit 10322 calculates information such as axle load and axle speed according to the axle load information, and saves the axle data in the vehicle information storage unit 10322; The storage unit 10322 deletes the corresponding data. When the axle passes the sensor completely, the vehicle information storage unit 10322 counts the vehicle information data.

Fig. 8 is a layout diagram of a specific embodiment of the dynamic large scale in the dynamic vehicle-type automatic weighing system of the present invention. As shown in the figure, the dynamic large scale of this embodiment includes: an upper weighing platform, an intermediate weighing platform, a lower weighing platform and auxiliary weighing platforms A and B, which are located between the upper weighing platform and the intermediate weighing platform; the auxiliary weighing platform C , D, located between the middle weighing platform and the lower weighing platform, that is, the dynamic large scale of this embodiment is composed of 7 weighing platforms. And the upper weighing platform, the middle weighing platform, the lower weighing platform and the auxiliary weighing platforms A, B, C, D are all rectangular, and the latter weighing platform is overlapped on the previous weighing platform, and each weighing platform is connected by overlapping parts for pin connection. In this embodiment, the lengths of the intermediate weighing platform, the upper weighing platform and the lower weighing platform are all 1 meter, and the lengths of the auxiliary weighing platforms A, B, C, and D are 4.5 meters, forming a length × width Rectangular integral weighing platform with a height of 21000×3000×455mm, the length of the weighing platform at both ends and the middle is 1000mm. Four sensors are respectively installed under each weighing platform, and a set of load cells are shared at the joints of the two weighing platforms. In this embodiment, 16 sensors are installed under the entire weighing platform. The heights of all sensors should be consistent, and the entire weighing platform should be kept level after installation. The center line of the overlapping position is on the same straight line as the center line of the supporting sensor, and the overlapping positions of two adjacent weighing platforms coincide with the center plane of the sensor.

Fig. 9 is a specific example of a dynamic vehicle-type automatic weighing system composed of the dynamic large scale shown in Fig. 8 and the weighing data processor, coil, axle, grating and digital junction box shown in Fig. 4-7. Schematic diagram of the structure of the embodiment. Therefore, the same elements as those in FIGS. 4-7 are marked with the same reference numerals. When measuring, install it in the middle of the road lane, from the direction of driving, the upper weighing platform, auxiliary weighing platform A, auxiliary weighing platform B, middle weighing platform, auxiliary weighing platform C, auxiliary weighing platform D and lower weighing platform weighing platform. The lengths of the intermediate weighing platform, the upper weighing platform and the lower weighing platform are all 1 meter, and the lengths of the auxiliary weighing platforms A, B, C, and D are 4.5 meters, forming a length × width × height of 21000 × 3000 ×455mm rectangular integral weighing platform, the length of the weighing platform at both ends and the middle is 1000mm. And, there are two groups of sensors under each weighing platform, therefore, there are 8 groups of sensors under the 7 weighing platforms, which are respectively the first group of sensors 1018 and 1019, the second group of sensors 1017 and 10110, the third group of sensors 1016 and 10111, fourth set of sensors 1015 and 10112, fifth set of sensors 1014 and 10113, sixth set of sensors 1013 and 10114, seventh set of sensors 1012 and 10115, and eighth set of sensors 1011 and 10116.

Fig. 10 is a flow chart of a method for weighing a vehicle by using the dynamic whole-vehicle automatic weighing system shown in Fig. 9 . As shown in the figure, the dynamic vehicle-type automatic weighing method includes:

Step S101, dividing the dynamic vehicle-type weighing platform into an upper weighing platform, an intermediate weighing platform, a lower weighing platform, and a plurality of auxiliary weighing platforms located between the upper weighing platform, the intermediate weighing platform, and the lower weighing platform. The weighing platform is used to carry the vehicle to be weighed passing by; step S102, when the vehicle to be weighed is passing the dynamic vehicle weighing platform, the upper weighing platform calculates the vehicle to be weighed The number of axles at the time of weighing, the weighing platform of the lower scale calculates the number of axles of the vehicle to be weighed at the time of weighing, and the intermediate weighing platform separates the vehicles on the weighing platform; step S103, the vehicle to be weighed is When driving past the dynamic vehicle-type weighing platform, process the data collected by multiple groups of load cells arranged on the upper weighing platform, middle weighing platform, lower weighing platform and multiple auxiliary weighing platforms. The axle load signals of each axle of the vehicle to be weighed are used to generate axle load data and axle driving state data of the vehicle under test.

Fig. 11 is a waveform diagram of a single weighed vehicle with two axles collected by the dynamic whole-vehicle automatic weighing system shown in Fig. 9 on the scale. It can be seen from Figure 11 that the number of axles, axle load and the position of the axles on the weighing platform can be accurately calculated through the signals of the 8 groups of sensors on the weighing platform. Among them, the L curve (that is, the curve connected by the break points A1-A2-A3-A4-A5-A6) represents the change graph of the total weight curve of the vehicle being weighed on the weighing platform. Curve L1 represents the signals transmitted by the first group of sensors 1018 and 1019. It can be seen that at the first value peak A1 of the L1 curve, the first axle of the vehicle to be weighed begins to be weighed, and at the second value peak B1 At , the second axle of the vehicle to be weighed begins to be weighed, and thereafter, as shown by the A3-A4 line segment of the L curve, the weighing weight remains stable until the signal curve L8 transmitted by the last group of sensors 1011 and 10116. At the peak C1 of a numerical value, the total weight data begins to drop, indicating that the first axle of the vehicle being weighed starts to leave the scale platform, and at the second numerical peak A6 of the curve L8, the second axle of the vehicle being weighed leaves the scale platform , the weighing ends.

Therefore, the dynamic weighing system of the present invention can maintain stable and real total amount data when weighing a single vehicle, and achieve the same high precision as static weighing.

FIG. 12 is a waveform diagram of two vehicles with two axles on the scale at the same time collected by the dynamic vehicle-type automatic weighing system shown in FIG. 9 . It can be seen from FIG. 12 that the Q curve represents the curve change graph of the total weighing weight of the two vehicles being weighed on the weighing platform at the same time. Curve Q1 represents the signals transmitted by the first group of sensors 1018 and 1019. It can be seen that at the peak W1 of the first numerical value of the Q1 curve, the scale is started for the first axle of the previous weighed vehicle, and at the second numerical value At the peak W2, the second axle of the previous weighed vehicle starts to be weighed, and at the third value peak W3 of the Q1 curve, the first axle of the next weighed vehicle starts to be weighed, and on the Q1 curve At the peak W4 of the fourth numerical value of , the second axle of the last vehicle to be weighed starts to be weighed until it is shown in the stable curve segment of the maximum value of the Q curve, which is the weight of two vehicles that are on the scale at the same time. total weight.

At the first value peak k1 on the signal curve Q8 transmitted by the last group of sensors 1011 and 10116, the total weight data begins to decline, indicating that the first axle of the previous weighed vehicle starts to leave the weighing platform, at the first value of the curve Q8 At the peak k2 of the two values, it means that the second axle of the previous weighed vehicle leaves the weighing platform, and at the third numerical peak k3 of the curve Q8, it means that the first axle of the latter weighed vehicle leaves the weighing platform. The peak k4 of the fourth numerical value of Q8 indicates that the second axle of the vehicle to be weighed leaves the weighing platform, and the weighing ends.

It can be seen from the dynamic weighing waveforms of two vehicles shown in Figure 12 that the current weighing platform has no weight, that is, the front vehicle is completely weighed down, and the calculation method of the rear axle weight and total weight is the same as that of the front vehicle; the current weighing platform has The weight means that the front vehicle is not fully weighed, and the first axle of the rear vehicle is weighed. According to the weight change of the first and second groups of sensors and the state of the front axle, the moment when the first axle of the rear vehicle is fully weighed is obtained, and combined with The weight change of the 7th and 8th group of sensors is used to obtain the state of the front vehicle, and the stable weight on the scale platform minus the unweighed weight of the front vehicle is the axle load of the first axle of the rear vehicle; similarly, the rest of the rear vehicle can be calculated Axle weight and gross weight of the shaft.

Utilizing the dynamic vehicle-type automatic weighing system of the embodiment of the present invention, when the following vehicle follows the vehicle, the axle positions of the front vehicle and the rear vehicle can be tracked in real time. The two parts of the independent weighing platform weigh the accurate weight of the front and rear vehicles respectively, so as to realize the accurate weighing of the weight of the rear vehicle. When using 4-table structure, since the length of each table is greater than 5 meters, in the actual passing process, there is little possibility that the distance between the front and rear vehicles is greater than one board, and it is impossible to achieve accurate weighing of the weight of the rear vehicle. However, when using 7-table structure , due to the existence of a 1-meter platform in the middle, the possibility that the distance between the front and rear vehicles is greater than one plate has become inevitable, so that the weight of the rear vehicle can be accurately weighed.

Compared with the existing static weighing and dynamic weighing with four weighing platforms, the dynamic vehicle-type automatic weighing system and method of the embodiments of the present invention have the following advantages: since the dynamic large scale of the present invention adopts the upper weighing platform, The overlapping mode of the intermediate weighing platform, the lower weighing platform and the auxiliary weighing platform can ensure that each vehicle to be tested can pass through the main weighing platform (the upper weighing platform, the middle weighing platform and the lowering platform) when multiple vehicles are dynamically scaled simultaneously. There is one and only one axis on the same platform, so the number of axes on and off the vehicle scale can be correctly identified, and the driving position of each vehicle on the scale can be accurately tracked, and it can be weighed on the dynamic large scale Distribution, accurately distinguish them, realize the separation of multi-vehicle data and accurately calculate the weight of each vehicle, thereby improving the weighing accuracy.

The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention and are not intended to limit the scope of the present invention. Protection scope, within the spirit and principles of the present invention, any modification, equivalent replacement, improvement, etc., shall be included in the protection scope of the present invention.

Claims (13)

1. A dynamic vehicle-mounted automatic weighing system, characterized in that, the dynamic vehicle-mounted automatic weighing system comprises: The upper weighing platform, the middle weighing platform, the lower weighing platform and a plurality of auxiliary weighing platforms located between the upper weighing platform, the middle weighing platform and the lower weighing platform are used to carry the vehicles to be weighed passing by; Arranged from the driving direction, the upper weighing platform, several of the plurality of auxiliary weighing platforms, the middle weighing platform, the remaining several of the plurality of auxiliary weighing platforms, and the lower weighing platform are arranged in sequence; Wherein the upper weighing platform is used to calculate the number of axles of the weighed vehicle when it is on the scale, the lower weighing platform is used to calculate the axle number of the weighed vehicle when it is off the scale, and the intermediate scale The platform is used to separate the vehicles on the weighing platform; A plurality of sets of load cells are respectively arranged on the upper weighing platform, the middle weighing platform, the lower weighing platform and a plurality of auxiliary weighing platforms, and are used to collect the axle load signals of each axle of the vehicle to be weighed; a weighing data processor, configured to receive the axle load signal, and generate axle load data and axle driving state data of the weighed vehicle according to the axle load signal; A digital junction box, connected between the multiple groups of load cells and the weighing data processor, for transmitting the data collected by the multiple groups of load cells to the weighing data processor; and The grating is connected to the digital junction box and is used to detect the presence of the weighed vehicle, generate a closing signal, and send it to the weighing data processor through the digital junction box. 2. The dynamic vehicle-type automatic weighing system as claimed in claim 1, wherein the upper weighing platform, the middle weighing platform, the lower weighing platform and a plurality of auxiliary weighing platforms are rectangular, and the latter The weighing platform is lapped on the previous weighing platform through lap joints, and the connection mode between each weighing platform is pin connection. 3. The dynamic vehicle-type automatic weighing system as claimed in claim 1, characterized in that, the distance between the middle weighing platform and the upper weighing platform and the distance between the middle weighing platform and the lower weighing platform The distances between platforms are equal, and the number of auxiliary weighing platforms between the upper weighing platform and the middle weighing platform is the same as the number of auxiliary weighing platforms between the lower weighing platform and the middle weighing platform. 4. The dynamic vehicle-type automatic weighing system as claimed in claim 1, wherein the lengths of the upper weighing platform, the middle weighing platform and the lower weighing platform are the same, and the number of auxiliary weighing platforms in the plurality of auxiliary weighing platforms is The length of each is 4-5 times of the length of the upper weighing platform, the middle weighing platform or the lower weighing platform. 5. The dynamic vehicle-type automatic weighing system as claimed in claim 4, wherein the lengths of the intermediate weighing platform, the upper weighing platform and the lower weighing platform are all 1 meter. 6. The dynamic vehicle-type automatic weighing system according to claim 5, wherein the length of the plurality of auxiliary weighing platforms is 4.5 meters. 7. The dynamic vehicle-type automatic weighing system according to claim 1, wherein there are four auxiliary weighing platforms, two of which are located between the upper weighing platform and the middle weighing platform , and the remaining two are located between the middle weighing platform and the lower weighing platform. 8. The dynamic vehicle-type automatic weighing system according to any one of claims 1-7, characterized in that two groups of load cells are installed under each weighing platform, and a shared load cell is used at the joint of the two weighing platforms. Group of load cells. 9. The dynamic vehicle-type automatic weighing system according to any one of claims 1-7, wherein the dynamic vehicle-type automatic weighing system further comprises: The coil is connected to the digital junction box, and is used to detect the arrival of the weighed vehicle, generate a weighing measurement trigger signal, and transmit it to the weighing data processor through the digital junction box; The axles are connected to the digital junction box, and are used to detect the axle type of each axle of the weighed vehicle, generate axle type signals, and transmit them to the weighing data processor through the digital junction box. 10. The dynamic vehicle-mounted automatic weighing system as claimed in claim 9, wherein said weighing data processor comprises: A data acquisition unit, configured to collect signals transmitted by the plurality of sets of load cells, coils, axles and gratings; A data processing unit, configured to process a plurality of signals collected by the data acquisition unit, and generate axle load information, axle speed information, wheelbase information, axle type information, and vehicle driving state information of the weighed vehicle; The data interaction unit is used to store various information generated by the data processing unit and send it to the upper computer for data interaction with the outside world. 11. The dynamic vehicle-mounted automatic weighing system according to claim 9, wherein the signals transmitted by the multiple groups of load cells include: The axle load information of each axle collected by each group of sensors includes the dynamic data of tire pressure on the ground. 12. The dynamic vehicle-mounted automatic weighing system as claimed in claim 11, wherein said data processing unit comprises: A vehicle driving state information acquisition unit, configured to judge the driving direction of the weighed vehicle according to the timing of the axle load signals collected by each group of sensors; an axle information calculation unit, configured to calculate the axle load information, axle speed information, and wheelbase information according to the axle load information; The vehicle information storage unit is used to store the vehicle driving state information, axle load information, axle speed information, and wheelbase information of the weighed vehicle. 13. A dynamic vehicle-type automatic weighing method, characterized in that, the dynamic vehicle-type automatic weighing method comprises: The dynamic vehicle-type weighing platform is divided into an upper weighing platform, a middle weighing platform, a lower weighing platform and a plurality of auxiliary weighing platforms between the upper weighing platform, the middle weighing platform and the lower weighing platform, To be weighed vehicles passing by; When the vehicle to be weighed passes the dynamic vehicle-type weighing platform, the upper weighing platform calculates the number of axles of the vehicle to be weighed when it is on the scale, and the lower weighing platform calculates the The number of axles of the weighed vehicle when it is unloaded, and the intermediate weighing platform separates the vehicles on the weighing platform; When the vehicle to be weighed passes the dynamic vehicle-type weighing platform, it processes multiple groups of scales set on the upper weighing platform, middle weighing platform, lower weighing platform and multiple auxiliary weighing platforms. The axle load signals of each axle of the weighed vehicle collected by the load sensor generate axle load data and axle driving state data of the weighed vehicle.