CN112304406B - Self-powered detection device and detection method for road vehicle weighing - Google Patents
Self-powered detection device and detection method for road vehicle weighing Download PDFInfo
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- CN112304406B CN112304406B CN202011173841.4A CN202011173841A CN112304406B CN 112304406 B CN112304406 B CN 112304406B CN 202011173841 A CN202011173841 A CN 202011173841A CN 112304406 B CN112304406 B CN 112304406B
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- 238000001514 detection method Methods 0.000 title claims abstract description 53
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/02—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles
- G01G19/03—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles for weighing during motion
- G01G19/035—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles for weighing during motion using electrical weight-sensitive devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/32—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from a charging set comprising a non-electric prime mover rotating at constant speed
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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Abstract
The invention discloses a self-powered detection device and a detection method for road vehicle weighing, wherein a displacement device, a piezoelectric module and a displacement detection device are arranged between a panel and a bearing substrate, the piezoelectric module converts pressure into electric power to supply power for a sensor and a control unit, and sends piezoelectric waveform signals when each shaft passes to the control unit, the shaft number and the shaft weight information of a vehicle are sensed based on the response characteristics of the piezoelectric signals, the output sensitivity is high, the waveform response characteristics are obvious, the real-time transmission effect is stable, meanwhile, the state of the vehicle during weighing is represented by the displacement and the acceleration of the panel, whether the vehicle jumps or not is judged, the vehicle escaping is avoided, the defect that the 'jumping pound' behavior of a full-load truck is difficult to identify by the existing weighing equipment is effectively overcome, the self-powered detection equipment is realized by the piezoelectric power generation technology, and a new clean energy supply way in the field of road engineering is effectively widened, the traditional energy consumption is reduced.
Description
Technical Field
The invention belongs to the field of road engineering, relates to vehicle weighing detection, and particularly relates to a self-powered detection device and a detection method for road vehicle weighing.
Background
In order to comprehensively and effectively control the over-limit and overload transportation behavior of the trucks on the highway and further ensure the safety and convenience of road transportation, the highway entrance is uniformly weighed and detected according to the vehicle (axle) type from 2020 throughout the country, and the existing axle group type weighing and detecting equipment is widely applied by virtue of the advantages of large weighing range, high precision, wide application and the like.
The conventional weighing equipment works depending on the traditional electric energy supply, and has the common fault that the effective recognition capability of the full-load truck 'jumping pound' behavior is poor, the 'jumping pound' means that a vehicle driver generates an acceleration when a tire passes through a weighing platform by accurately controlling a clutch, an accelerator and a braking system of the vehicle, the stress of the weighing platform is changed by utilizing the inertia principle, so that an over-pound method for lightening the axle weight is achieved, the jumping pound is the most common fee escaping method in the weighing and charging process and is the most difficult defined fee refunding method, and the conventional detection of the 'jumping pound' cheating behavior at the present stage is still in the manual stage.
Therefore, it is very important to design a self-powered road vehicle weighing device which is reasonable in structure, easy to operate and capable of meeting accurate and full-automatic detection requirements.
Disclosure of Invention
The invention provides a self-powered detection device and a detection method for road vehicle weighing, aiming at the problems that the existing vehicle weighing equipment cannot identify vehicle weighing and the measurement is inaccurate.
The invention is realized by the following technical scheme:
a self-powered detection device for weighing road vehicles comprises a control unit, a bearing substrate and a panel arranged on the top of the bearing substrate, wherein a displacement device, a piezoelectric module and a displacement detection device are arranged between the bearing substrate and the panel;
the displacement devices are arranged at two ends of the bearing base body respectively and are arranged along the running direction of the vehicle, and the displacement devices are elastic components and used for resetting the panel after being pressed;
the piezoelectric module comprises a shell arranged on the bearing base body and a piezoelectric conversion structure filled in the shell, wherein the top of the piezoelectric conversion structure is provided with a stress protection cushion block, and the piezoelectric conversion structure is used for converting the pressure of the panel into electric power for storage and output;
the displacement detection device comprises a distance sensor, an elastic component and a trigger component; the distance sensor is connected with the elastic component, the compression direction of the elastic component is arranged along the direction of the lane line, and the trigger component is arranged at the bottom of the panel and used for triggering the elastic component to compress when the panel moves;
the control unit is used for receiving the acceleration and displacement of the panel and piezoelectric waveform signals output by the piezoelectric modules, determining the total axle weight of the vehicle according to received parameters and outputting a judgment result of whether the vehicle jumps or not.
Preferably, the displacement device comprises a horizontal displacement device and a vertical displacement device which are stacked up and down;
the vertical displacement device comprises a spring body and an elastic filling body filled in the spring;
the horizontal displacement device comprises a shell, high-elasticity rubber is filled in the shell, a moving shaft is preset in the high-elasticity rubber, the upper end of the moving shaft is connected with the panel, the lower end of the moving shaft is connected with the vertical displacement device in a sliding mode, the width of the shell is the same as the diameter of the moving shaft, and the sliding direction of the moving shaft is arranged along the length direction of a lane line.
Preferably, the two sides of the moving shaft are respectively provided with a fixed shaft at intervals, the lower end of the moving shaft is connected with the vertical displacement device, and the upper end of the moving shaft is connected with the panel in a sliding manner.
Preferably, the piezoelectric conversion structure is a piezoelectric ceramic.
Preferably, the bottom of the panel is provided with a force transmission device and is positioned at the top of the piezoelectric module, and the force transmission device is used for transmitting the pressure of the panel to the stress protection cushion block.
Preferably, the displacement detection devices are arranged in two groups, the two groups of displacement detection devices are symmetrically arranged along the radial direction of the lane line, the elastic parts are oppositely arranged, and the trigger component is arranged between the two elastic parts.
Preferably, the elastic member is provided in a guide rail for controlling a compression direction of the elastic member, and the displacement sensor is provided at an end of the elastic member.
Preferably, the trigger member is a T-shaped structure, the upper end of the vertical wall of the trigger member is connected with the panel, and the two ends of the horizontal arm of the trigger member are opposite to the end of the elastic part.
The detection method is based on a self-powered detection device for weighing road vehicles, and comprises the steps of acquiring piezoelectric waveform signals of a piezoelectric module, displacement and acceleration values of a panel when each shaft of a vehicle passes through the panel;
determining the number of axles of the vehicle according to the number of the piezoelectric waveform signals, and simultaneously determining the total axle weight of the vehicle according to the peak value of each piezoelectric waveform signal;
and when the acceleration or/and the displacement are larger than the corresponding threshold values, determining that the vehicle jumps when being weighed.
Preferably, the method for calculating the weight of the vehicle is as follows:
G≤W
wherein G is the total axle weight of the vehicle, W is the vehicle weight limit, i is the number of axles of the vehicle, GiThe axle weight of the i-th axle of the vehicle, UiThe voltage peak value of a piezoelectric signal waveform correspondingly generated when the ith axis of the vehicle rolls the panel is shown, eta is the ratio of the mechanical-electrical conversion efficiency, the pressure stress and the voltage of the piezoelectric conversion structure, k is the correction coefficient of the pressure stress and the axle load weight, and k is more than 1.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention provides a self-powered detection device for weighing road vehicles, wherein a displacement device, a piezoelectric module and a displacement detection device are arranged between a panel and a bearing substrate, the displacement device deforms and supports the panel when a vehicle passes through the detection device and quickly resets the panel after detection and reception, the piezoelectric module converts pressure into electric power to supply power to a sensor and a control unit, piezoelectric waveform signals when each shaft passes through are sent to the control unit, meanwhile, the displacement and acceleration values of the panel during weighing are obtained through an acceleration sensor and a distance sensor, the information of the number of shafts and the axle weight of the vehicle is sensed based on the response characteristics of the piezoelectric signals, the output sensitivity is high, the waveform response characteristics are obvious, the real-time transmission effect is stable, and meanwhile, whether the vehicle jumps or not is judged according to the weighing state of the vehicle represented by the displacement and the acceleration values, avoid the vehicle to flee the expense, effectively solve the drawback that current weighing-appliance is difficult to discern the full-load wagon "jump pound" action, realize the check out test set self-power through piezoelectric power generation technology, effectively widen the clean energy in road engineering field and supply with new way, reduce traditional energy consumption.
Drawings
FIG. 1 is a side view of a test device of the present invention;
FIG. 2 is a schematic view of the internal structure of the detecting device of the present invention;
FIG. 3 is a schematic view of the upper panel structure of the detecting device of the present invention;
FIG. 4 is a schematic structural diagram of a horizontal displacement device of the detecting device of the present invention;
FIG. 5 is a schematic view of an external display according to the present invention;
fig. 6 is a schematic diagram of the piezoelectric module and control unit of the present invention.
In the figure: 1. a package housing; 2. a displacement device; 3. a force transfer device; 4. a piezoelectric module; 5. a displacement detection device; 6. an energy storage device; 7. an information display; 1-1, a panel; 1-2, a bearing matrix and 1-3; a cable output port; 1-1-1, friction panel; 1-1-2, a trigger member; 1-1-3, an acceleration sensor; 2-1, an elastic filling body; 2-2, a spring body; 2-3, a horizontal displacement device; 2-3-1, and fixing the shaft; 2-3-2, moving axis; 3-1, a force transfer member; 3-2, actuating a pressure plate; 4-1, a shell; 4-2, a piezoelectric conversion structure; 4-3, an insulating cushion layer; 4-4, stress protection cushion blocks; 5-1, a distance sensor; 5-2, an elastic component; 5-3, a guide rail; 5-2-1, spring leaf; 6-1, a circuit board; 6-2, port; 6-3, an energy storage capacitor; 6-4, conducting wires; 8-1, vehicle axle number indicator light; 8-2 and a display screen.
Detailed Description
The present invention will now be described in further detail with reference to the attached drawings, which are illustrative, but not limiting, of the present invention.
Referring to fig. 1-6, a self-powered detection device for road vehicle weighing comprises a package housing 1, and a displacement device 2, a force transmission device 3, a piezoelectric module 4, a displacement detection device 5, an energy storage device 6 and a control unit arranged inside the package housing.
The packaging shell 1 comprises a bearing base body 1-2 and a panel 1-1 arranged on the top of the bearing base body, wherein a cable output port 1-3 is arranged on the bearing base body 1-2, and two displacement devices 2 are respectively arranged at two ends of the bearing base body 1-2 and the panel 1-1 and are arranged along the running direction of a vehicle.
The displacement device 2 comprises a horizontal displacement device 2-3 and a vertical displacement device which are arranged on top of each other.
The vertical displacement device comprises a spring body 2-2 and an elastic filling body 2-1 filled in the spring.
The horizontal displacement device 2-3 comprises a shell, two fixed shafts 2-3-1 and a movable shaft 2-3-2 which are arranged in the shell, the movable shaft is positioned between the two fixed shafts, the lower ends of the fixed shafts are connected with the top of the spring body through a connecting plate, the upper end of the movable shaft is fixedly connected with the panel 1-1, the fixed shafts and the movable shaft are arranged along the direction of a lane line, high-elastic rubber is arranged between the fixed shafts and the movable shaft, and the width of the shell is equal to the diameter of the fixed shafts and the diameter of the movable shaft.
After the vehicle rolled the panel, spring body and elastic filling body took place compression deformation, made the panel take place vertical displacement, and simultaneously, the panel took place horizontal displacement along the reverse movement of vehicle advancing direction under the effect of frictional force, moving axis synchronous motion, moved and extrudeed high-elastic rubber to the dead axle promptly, left the panel when the vehicle, and spring body, elastic filling body and high-elastic rubber made the panel reset.
In order to increase the friction force, a friction panel 1-1-1 is laid on the top of the panel, and patterns or convex points are arranged on the friction panel for increasing the friction force.
The two piezoelectric modules 4 are arranged along the lane line direction and are positioned between the two displacement devices, the piezoelectric templates are arranged on the bearing base body, and the force transmission device is positioned at the top of the bearing base body, is fixedly connected with the bottom surface of the panel and is used for transmitting the pressure of the panel to the piezoelectric templates.
The piezoelectric module 4 comprises a shell 4-1, a piezoelectric conversion structure 4-2, an insulating cushion layer 4-3 and a stress protection cushion block 4-4; the piezoelectric conversion structure is filled in the shell, the top and the bottom of the piezoelectric conversion structure are respectively paved with an insulating cushion layer, the top of the insulating cushion layer on the upper layer is provided with a stress protection cushion block, and when a vehicle rolls and weighs, the stress protection cushion block is in uniform contact with a force transmission device which is pressed downwards, so that good compressive stress capture is ensured.
The force transmission device transmits pressure to the piezoelectric conversion structure through the stress protection cushion block, and the piezoelectric conversion structure converts pressure energy into electric energy to be stored and output to each electric device.
The piezoelectric conversion structure 4-2 is PZT piezoelectric ceramics.
The force transmission device 3 comprises a force transmission component 3-1 and an actuating pressure plate 3-2; the power transmission component is fixed at the bottom of the panel and positioned at the top of the shell, the actuating pressure plate is arranged at the bottom of the power transmission component, and when the power transmission component works, the actuating pressure plate presses the stress protection cushion block downwards, and the area of the actuating pressure plate is larger than the size of the top of the shell.
The energy storage device 6 is connected with the piezoelectric module 4, the energy storage device 6 comprises a circuit board 6-1, a port 6-2, an energy storage capacitor 6-3 and a lead 6-4, the energy storage capacitor is connected with the circuit board, the circuit board is connected with the piezoelectric module through a guide, and the other end of the circuit board is connected with the control unit, the acceleration sensor and the distance sensor through leads. The piezoelectric module is connected with a rectifier bridge through a charge amplifier, and the rectifier bridge is connected with an energy storage capacitor to realize the storage and the output of electric energy.
The displacement detection device is arranged between the two piezoelectric modules, and the displacement detection device 5 comprises a distance sensor 5-1, an elastic component 5-2, a guide rail 5-3 and a trigger component 1-1-2.
The elastic member is arranged in the guide rail, the compression direction of the elastic member is arranged along the direction of the lane line, the distance sensor 5-1 is arranged in the housing and is positioned at the tail end of the elastic member, namely the other end of the triggering end of the elastic member, the elastic member is deformed under pressure, and the distance sensor 5-1 at the tail end obtains the deformation displacement of the elastic member according to the pressure.
The elastic component 5-2 is a spring leaf 5-2-1.
The two spring elastic pieces are symmetrically arranged on the displacement detection device, the two spring elastic pieces are oppositely arranged, the trigger component is arranged between the two spring elastic pieces, the upper end of the trigger component is connected with the panel, the lower end of the trigger component extends between the two spring elastic pieces, and when the panel moves, the lower end of the trigger component triggers one of the spring elastic pieces of the displacement detection device.
Referring to fig. 1 again, for example, when the vehicle moves forward from the right end to the left end of the drawing at a constant speed, the lower end of the triggering member triggers the right spring leaf under the action of friction force, and when the vehicle is braked, the left spring leaf is triggered under the action of inertia force.
The trigger component is of a T-shaped structure, the horizontal rod is located between the two spring elastic pieces, and the end part of the horizontal rod is used for triggering the spring elastic pieces.
The bottom surface of the panel is provided with an acceleration sensor 1-1-3 which is used for measuring the acceleration of the horizontal movement of the conducting component 1-1-2, assisting in representing the running state of the vehicle, outputting the acceleration value to a control unit, and quantitatively representing the acceleration/braking and uniform speed state of the running of the vehicle without stopping and weighing according to the acceleration value, wherein the acceleration sensor is used as the identification basis for judging whether the full-load truck jumps or not.
The control unit comprises a controller, and a vehicle axle number indicator light 8-1 and a display screen 8-2 which are connected with the controller, wherein the controller is respectively connected with the piezoelectric module, the distance sensor and the acceleration sensor and is used for acquiring displacement deformation, piezoelectric waveform signals and acceleration values.
The controller is a PLC, and the piezoelectric waveform signal output by the piezoelectric module is filtered by the filter and then output to the PLC through the signal modulator.
The working principle of the self-powered detection device for weighing road vehicles according to the present invention will be explained in detail below.
When the vehicle passes through the panel, under the effect of vehicle gravity, the vertical displacement device takes place to warp, also be exactly that spring body and elastic filling body take place to warp along the vertical direction, and simultaneously, power transmission device moves down in step, and the pressure stress protection cushion is pushed down to the actuation clamp plate, and piezoelectric conversion structure converts pressure into electric power, stores and supplies power to the control unit, distance sensor and acceleration sensor through energy storage capacitor, and simultaneously, when piezoelectric module 4 weighs the vehicle and rolls based on piezoelectric effect, the pressure stress correspondence of every axle is converted into piezoelectricity waveform signal output the control unit.
Secondly, the vehicle passes through the panel and generates friction force with the panel, so that the vehicle moves in the opposite direction of the vehicle, meanwhile, the trigger member is driven to trigger the spring leaf of the opposite-direction displacement detection device in the advancing direction of the vehicle, the distance sensor detects the displacement of the spring leaf and sends the displacement to the control unit, and meanwhile, the acceleration sensor sends the acceleration value to the control unit.
The peak value of the piezoelectric waveform signal is in a direct proportion relation with the vehicle axle load compressive stress value, the control unit records the peak value of each piezoelectric waveform signal when each axle of the vehicle is rolled, determines the axle weight of the corresponding axle of the vehicle according to the peak value and outputs the axle weight through the display screen; meanwhile, the number of the vehicle axles is determined according to the response number of the piezoelectric waveform signals, the signals are output to a display screen, and meanwhile, the vehicle axle number indicating lamps with the corresponding number are lightened.
The application method of the self-powered detection device for weighing the road vehicles in working is as follows:
1. each shaft of the traveling vehicle entering the weighing area sequentially rolls the panel of the weighing device.
2. Under the effect of each axle in proper order, the displacement device of weighing device takes place deformation gradually to drive force transfer device and exert load compressive stress to the piezoelectric module, piezoelectric conversion takes place for the piezoelectric module, and the piezoelectricity micro energy who produces is gathered through the circuit board and is stored to the electric capacity in, for acceleration sensor, displacement sensor and the power supply of control unit.
3. The number of times of piezoelectric waveform signals generated in the whole process of rolling each axle of the vehicle is the number of axles of the vehicle, and axle number information is displayed to a display of the control unit after signal conversion of the circuit board.
4. The peak value of the piezoelectric waveform signal sequentially generated in the whole rolling process of each axle of the vehicle is converted into the accurate axle weight, the axle weight information is displayed to a display after being converted by a controller, and the conversion formula is as follows:
G≤W
in the formula:
g is the total axle weight of the vehicle;
w-vehicle weight limit specified in the Specification;
i-vehicle axle number;
Gi-the axle weight of the vehicle's i-th axle;
Uithe voltage peak value of the piezoelectric signal waveform correspondingly generated when the vehicle is rolled on the ith axis;
eta is the ratio of the piezoelectric conversion efficiency, the compressive stress and the voltage of the piezoelectric material;
k is the correction coefficient of the compressive stress and the axle load weight, and k is more than 1 because of the loss of the downward transmission of the axle load stress caused by the elastic deformation of the displacement device;
the following describes a method for detecting the pound-skipping behavior of a vehicle during weighing, specifically as follows:
and when the acceleration or/and the displacement are/is larger than the respective corresponding threshold values, determining that abnormal braking/acceleration suspicious behaviors exist during weighing of the vehicle, forbidding passing and reweighing.
Specifically, when the vehicle of marcing weighs, under friction panel and the good coupling contact effect of vehicle tire, push down and take place the horizontal direction simultaneously and remove and drive the trigger member extrusion spring shell fragment on the panel, make the spring body take place different degree shrinkage deformation, different advancing state accelerates suddenly/brakes, the at the uniform velocity lower tyre is different to friction panel meshing degree, lead to spring shell fragment shrinkage deformation value different, distance sensor discerns deformation distance, acceleration sensor discerns the acceleration value when the vehicle brakes/accelerates instantaneously simultaneously, and evaluate the vehicle state of marcing of weighing according to the following table, effectively judge the foundation as "jump pound" action in view of the above.
Watch 'jump pound' behavior judgment standard
Note:
o-the vehicle running state is normal, no abnormal braking/accelerating action is caused, and the vehicle is released;
x-vehicle abnormal braking/acceleration suspicious behavior, no release, reweighing.
This traveling vehicle weighing detection is completed so far.
The piezoelectric technology collects and converts environmental vibration energy into electric energy, and meanwhile, the piezoelectric signal has the advantages of high output sensitivity, obvious waveform response characteristic, stable real-time transmission effect and the like, the self-powered vehicle weighing equipment is designed by relying on the principle of the piezoelectric technology, and the piezoelectric response signal is applied to the detection and identification of vehicle non-stop weighing, so that a new way for effectively widening clean energy supply in the road field is realized while full-automatic and accurate detection of vehicle weighing is realized, and the piezoelectric vehicle weighing equipment has great research value and application prospect.
Compared with the prior art, the invention has the following advantages:
1. the information such as the number of axles and the axle weight of the vehicle is sensed based on the piezoelectric signal response characteristics, the output sensitivity is high, the waveform response characteristics are obvious, and the real-time transmission effect is stable.
2. The running state of the weighing vehicle under different axial types is represented through the deformation displacement, the 'pound jump' behavior is effectively judged according to the running state, and the defect that the 'pound jump' behavior of a full-load truck is difficult to recognize by the conventional weighing equipment is effectively overcome.
3. The self-energy supply of the weighing equipment is realized through the piezoelectric power generation technology, the new way of supplying clean energy in the field of road engineering is effectively widened, and the traditional energy consumption is reduced.
4. The inspection device is applied to the weighing detection of the entrance of the highway toll station, has reasonable structure and simple operation, and has wide research prospect and practical value.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (8)
1. A self-powered detection device for weighing road vehicles is characterized by comprising a control unit, a bearing substrate (1-2) and a panel arranged on the top of the bearing substrate, wherein a displacement device (2), a piezoelectric module (4) and a displacement detection device (5) are arranged between the bearing substrate (1-2) and the panel;
the displacement devices (2) are respectively arranged at two ends of the bearing base body (1-2) and are arranged along the running direction of a vehicle, and the displacement devices (2) are elastic components and are used for resetting the panel after being pressed;
the displacement device (2) comprises a horizontal displacement device (2-3) and a vertical displacement device which are vertically superposed;
the vertical displacement device comprises a spring body (2-2) and an elastic filling body (2-1) filled in the spring;
the horizontal displacement device (2-3) comprises a shell, high-elasticity rubber is filled in the shell, a moving shaft (2-3-2) is preset in the high-elasticity rubber, the upper end of the moving shaft (2-3-2) is connected with a panel, the lower end of the moving shaft is connected with a vertical displacement device in a sliding mode, the width of the shell is the same as the diameter of the moving shaft, the sliding direction of the moving shaft is arranged along the length direction of a lane line, fixed shafts are arranged on two sides of the moving shaft at intervals respectively, the lower end of each fixed shaft is connected with the vertical displacement device, and the upper end of each fixed shaft is connected with the panel in a sliding mode;
the piezoelectric module (4) comprises a shell (4-1) arranged on the bearing substrate and a piezoelectric conversion structure (4-2) filled in the shell, the top of the piezoelectric conversion structure (4-2) is provided with a stress protection cushion block (4-4), and the piezoelectric conversion structure (4-2) is used for converting the pressure of the panel into electric power for storage and output;
the displacement detection device (5) comprises a distance sensor (5-1), an elastic component (5-2) and a trigger component (1-1-2); the distance sensor (5-1) is connected with the elastic component (5-2), the compression direction of the elastic component (5-2) is arranged along the direction of the lane line, and the triggering component is arranged at the bottom of the panel and is used for triggering the elastic component (5-2) to compress when the panel moves;
the bottom plate of panel sets up acceleration sensor, and the control unit is connected with acceleration sensor, distance sensor and piezoelectric module (4) respectively, and the control unit is used for receiving the acceleration of panel, the displacement volume to and the piezoelectricity waveform signal of piezoelectric module output, and confirm the total axle load of vehicle according to the parameter of receiving, and output vehicle whether jump pound the judged result.
2. A self-powered detection device for road vehicle weighing according to claim 1, characterised in that said piezoelectric transformation structure is a piezoelectric ceramic.
3. Self-powered detection device for road vehicle weighing according to claim 2, characterized in that the bottom of said panel is provided with force-transmitting means and is located on top of the piezoelectric module for transmitting the pressure of the panel to the stress-protection pads (4-4).
4. A self-powered detection device for road vehicle weighing according to claim 1, characterized in that said displacement detection devices are two groups, two groups of displacement detection devices being arranged symmetrically in the radial direction of the lane line and with the elastic parts arranged opposite each other, the triggering member being arranged between the two elastic parts.
5. A self-powered detection device for road vehicle weighing according to claim 4, characterized in that said elastic means are arranged in a guide for controlling the compression direction of the elastic means, the distance sensor being arranged at the end of the elastic means.
6. A self-powered detection device for road vehicle weighing according to claim 4, characterized in that said triggering member is of T-shaped configuration, with the upper end of its vertical wall connected to the panel and the two ends of its horizontal arm facing the ends of the elastic means.
7. Detection method for a self-powered detection device for road vehicle weighing according to any one of claims 1 to 6,
acquiring piezoelectric waveform signals of a piezoelectric module, and displacement and acceleration values of a panel when each shaft of a vehicle passes through the panel;
determining the number of axles of the vehicle according to the number of the piezoelectric waveform signals, and simultaneously determining the total axle weight of the vehicle according to the peak value of each piezoelectric waveform signal;
and when the acceleration or/and the displacement are larger than the corresponding threshold values, determining that the vehicle jumps when being weighed.
8. A method for detecting a self-powered detection device for road vehicle weighing according to claim 7, characterized in that the weight of the vehicle is calculated as follows:
G≤W
wherein G is the total axle weight of the vehicle, W is the vehicle weight limit, i is the number of axles of the vehicle, GiThe axle weight of the i-th axle of the vehicle, UiThe voltage peak value of a piezoelectric signal waveform correspondingly generated when the ith axis of the vehicle rolls the panel is shown, eta is the ratio of the mechanical-electrical conversion efficiency, the pressure stress and the voltage of the piezoelectric conversion structure, k is the correction coefficient of the pressure stress and the axle load weight, and k is more than 1.
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| CN114136414A (en) * | 2021-10-19 | 2022-03-04 | 山东高速股份有限公司 | Medium-small span concrete small box girder bridge heavy load identification system based on computer vision |
| CN113870595B (en) * | 2021-10-28 | 2024-02-06 | 北京万集科技股份有限公司 | Driving guiding method, driving guiding device, computer equipment and medium |
| CN113870575A (en) * | 2021-10-28 | 2021-12-31 | 北京万集科技股份有限公司 | Driving guiding method and device, computer equipment and medium |
| CN115569318B (en) * | 2022-10-10 | 2023-05-26 | 国网山东省电力公司临沂供电公司 | Charging fireproof fire extinguishing device for electric vehicle |
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