CN112345058B - Weighing system and method for road vehicles - Google Patents
Weighing system and method for road vehicles Download PDFInfo
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- CN112345058B CN112345058B CN202011165058.3A CN202011165058A CN112345058B CN 112345058 B CN112345058 B CN 112345058B CN 202011165058 A CN202011165058 A CN 202011165058A CN 112345058 B CN112345058 B CN 112345058B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G23/00—Auxiliary devices for weighing apparatus
- G01G23/01—Testing or calibrating of weighing apparatus
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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
- G01G19/022—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 wheeled or rolling bodies in motion
- G01G19/024—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 wheeled or rolling bodies in motion using electrical weight-sensitive devices
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Abstract
The invention discloses a weighing system and a method for road vehicles, which relate to the field of vehicle weighing, wherein the weighing system comprises a weighing detection system and a weighing correction system, and the weighing system has a simple structure.
Description
Technical Field
The invention relates to the field of vehicle weighing, in particular to a weighing system and method for road vehicles.
Background
The dynamic weighing device of the existing dynamic weighing technology mainly comprises a quartz crystal sensor type, a narrow strip type, a shaft weight weighing platform type and a whole vehicle type. The quartz crystal sensor type is limited by the characteristics of the quartz crystal sensor, and when a vehicle passes through at a low speed or stays on the quartz crystal sensor for a long time, the weighing error is large. The quartz crystal sensor has a fixed length specification, and when the quartz crystal sensor meets the width of a lane with a non-standard width, a joint of the quartz crystal sensor is positioned in a weighing lane, so that the weighing detection precision is influenced; the narrow strip type equipment has a narrow weighing bearing surface, is small in contact area with a detected vehicle tire, belongs to partial wheel load detection, and can cause the increase of weighing errors under the influence of factors such as patterns, width, tire pressure, vibration, speed change and the like of the vehicle tire. The narrow strip sensor has a fixed length specification, and when meeting the lane width of nonstandard width, have the sensor joint to be located the lane of weighing, and then influence the detection accuracy of weighing.
The axle weight scale type and whole vehicle type equipment mostly adopts the strain type weighing sensor single-point stress deformation force transfer principle to weigh, the weighing platform must restrict the free floating of the weighing platform through a limiting device, and therefore a certain moving space is reserved around the scale body frame and the weighing platform so as to facilitate the self-resetting of the weighing platform. This structure is static at the vehicle, or when lower speed passes through, and the precision of weighing can be guaranteed, and when the high-frequency quick pass through of vehicle, can the symmetrical table produce great vertical direction and horizontal direction impact force, arouses weighing platform and the direct strong impact of balance body frame stop device, and then arouses strain gauge weighing sensor to take place the displacement and damage even. When the axle weight scale type and whole vehicle type equipment is applied to high-speed dynamic weighing, the defects of damaged equipment parts (limit, sensors, a weighing platform foundation and the like), shortened service life, incapability of ensuring weighing precision, large overhauling workload and the like exist.
Meanwhile, the automatic weighing apparatus for the road vehicles is arranged in the outdoor environment, the weighing result precision can be influenced by different degrees of the external environment temperature due to the large temperature difference in four seasons, namely spring, summer, autumn and winter, according to the above, the weighing sensor is fixed and arranged on the elastic strain beam of the flat plate type weighing bearing device, the matching fastening degree between the weighing sensor and the elastic strain beam can be changed along with the rise or the reduction of the temperature, and further the weighing precision is influenced, and meanwhile, the precision of the analog quantity amplifier and the digital-analog collector can also be influenced by different degrees of the environment temperature due to the inherent characteristics of electronic elements.
In conclusion, the weighing platform in the prior art has the advantages that the weighing precision is reduced after the weighing platform is used for a long time, the weighing platform is greatly influenced by the external environment temperature, and the precision of a vehicle during weighing cannot be guaranteed.
Disclosure of Invention
The invention aims to provide a weighing system and a method for road vehicles, wherein an automatic vehicle weighing apparatus adopted in the weighing system can effectively and accurately weigh the vehicles, and meanwhile, the weighing system is matched with weighing data error correction in the weighing system, so that the weighing system can further ensure the weighing accuracy of the vehicles under the condition of large external environment temperature change, and the problems in the background technology are solved.
In order to achieve the purpose, the invention provides the following technical scheme:
a weighing system for a road vehicle, the weighing system comprising: weighing detecting system and weighing correction system, weighing detecting system includes:
the automatic weighing apparatus comprises a weighing carrier and a weighing carrier frame for supporting the weighing carrier;
the vehicle separation equipment is used for detecting and recording relative displacement data between the vehicle and the automatic vehicle weighing apparatus;
the analog quantity amplifier is used for amplifying and outputting a weighing signal of the weighing loader;
the weighing correction system comprises: the weighing controller is arranged in the automatic weighing apparatus for detecting the real-time temperature of each part in the automatic weighing apparatus, and comprises a plurality of temperature sensors, a weighing controller and a weighing controller, wherein the temperature sensors are connected with temperature acquisition control, and the weighing controller is used for comprehensively analyzing and judging weighing data and temperature detection data in the weighing detection system.
As a further scheme of the invention: the weighing detection system further comprises a digital-analog collector used for receiving the output signal of the analog quantity amplifier, the digital-analog collector is further used for receiving the signal output by the vehicle separation equipment, and the digital-analog collector is connected with the weighing controller.
As a further scheme of the invention: the vehicle separation equipment comprises a ground induction coil and a vehicle detector, wherein the ground induction coil is embedded into the ground and used for detecting the relative displacement between the vehicle and the weighing loader, the vehicle detector is electrically connected with the ground induction coil, and the vehicle detector is connected with the digital-analog collector.
As a further scheme of the invention: the automatic weighing apparatus for a vehicle specifically includes: a weighing platform panel used for forming the weighing loader and a plurality of groups of weighing platform rib plates which are vertical to the weighing platform panel; the elastic strain beam is fixed at the lower end of the weighing platform panel, and a weighing sensor mounting hole is formed in the elastic strain beam; the weighing sensor is fixed in the weighing sensor mounting hole; the inner surface of the weighing loader is fixedly connected with a temperature sensing module, and the inner surface of the weighing loader frame is fixedly connected with a drain pipe and a threading pipe; the weighing loader is characterized in that sealing strips are fixedly connected in the joint seams of the weighing loader and the weighing loader frame body, and calibration fixing holes are formed in the two sides of the upper surface of the weighing loader frame body.
A method of weighing a weighing system for a road vehicle, comprising:
step one, a vehicle to be detected drives into a weighing area, a vehicle separation device is started to be in a trigger state, and a weighing controller starts weighing data acquisition; the weighing sensor sequentially collects tire weighing data of the vehicle, transmits the data to the weighing controller, and performs comprehensive calculation to obtain weighing data M of the vehicle;
step two, the temperature acquisition controller detects data of a plurality of built-in temperature sensors in the automatic weighing apparatus of the vehicle in real time and sends the data detected by the temperature sensors to the weighing controller;
thirdly, the weighing controller repeatedly learns by itself according to the set temperature threshold and the set weighing threshold, calculates and records the error correction rate of the weighing loader under different temperature conditions, and searches the error correction rate N which is most similar to the error correction rate under the current temperature condition in history by combining the current temperature conditionnAnd the actual weighing data of the vehicle obtained by the weighing controller is Zn＝M-Nn×M。
Compared with the prior art, the invention has the beneficial effects that: the weighing system and the method can pertinently eliminate the influence of the external temperature and the internal temperature on the automatic weighing machine of the vehicle, and can effectively eliminate the damage and the reduction of the precision of the automatic weighing machine of the vehicle after being used for a long time by combining the structural improvement of the automatic weighing machine of the vehicle in the weighing system; in the process of temperature error correction, the invention can not only preset the correction threshold value of factory temperature compensation for the weighing controller according to historical empirical values, but also can timely update the correction threshold value of the correction temperature compensation according to calibration and calibration at different environmental temperatures on site, and automatically learn and accumulate the empirical values of the error correction at different historical temperatures, so that the weighing result tends to be objective and accurate.
Drawings
FIG. 1 is a schematic view of a module coupling structure of an automatic weighing apparatus for vehicles;
FIG. 2 is a plan view of an automatic weighing apparatus for a vehicle;
fig. 3 is a front view of an automatic weighing apparatus for a vehicle;
fig. 4 is a side view of an automatic weighing apparatus for a vehicle;
FIG. 5 is a schematic cross-sectional view taken along line A-A of FIG. 2;
FIG. 6 is a schematic cross-sectional view of B-B of FIG. 2;
fig. 7 is a top view of the automatic balancer for a vehicle.
FIG. 8 is a flow chart of a weighing method of the weighing system of the present invention;
fig. 9 is a control block diagram of the calibration control apparatus.
In the figure: 1-weighing loader, 2-weighing loader frame, 3-leveling beam, 4-calibration fixing hole, 5-adjustment and repair hole, 6-drainage pipe, 7-threading pipe, 8-leveling device, 9-butt joint fixing hole, 10-elastic strain beam, 11-weighing sensor, 12-temperature sensor module, 13-sealing strip, 14-panel anti-skid groove, 15-weighing platform panel and 16-weighing platform rib plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Referring to fig. 1, in an embodiment of the present invention, a weighing system for a road vehicle includes: the automatic weighing system comprises a weighing detection system and a weighing correction system, wherein the weighing detection system is used for weighing a vehicle through a vehicle automatic weighing apparatus contained in the weighing detection system, and the weighing correction system is used for correcting the temperature error of vehicle weight data weighed by the weighing detection system; according to the invention, by introducing the temperature error correction method, the current environment temperature of each part and historical data can be automatically judged, calculated, compensated and corrected without human intervention before the weighing result of the automatic weighing machine of the vehicle is output.
The weighing and measuring system comprises: the automatic weighing device comprises a vehicle automatic weighing device used for weighing a vehicle, a vehicle separation device used for detecting and recording relative displacement data between the vehicle and the vehicle automatic weighing device, an analog quantity amplifier used for outputting a weighing signal method of the weighing loader, and a digital-analog collector used for receiving an output signal of the analog quantity amplifier, wherein the digital-analog collector is also used for receiving a signal output by the vehicle separation device.
The automatic weighing apparatus of vehicle includes the carrier 1 of weighing and weighs carrier framework 2, the carrier 1 of weighing passes through welded fastening with the carrier 2 of weighing, the carrier of weighing comprises multiunit mutually perpendicular's weighing platform gusset 16, the carrier of weighing includes weighing platform panel 15, and it has free floating or relative displacement between carrier 1 of weighing and the carrier framework 2 of weighing to do not have when the vehicle is current, after carrier 1 of weighing and the fixed completion of carrier framework 2 of weighing, its upper surface all with highway road surface parallel and level.
The weighing platform comprises a weighing platform rib plate, and is characterized in that an elastic strain beam 10 is fixedly connected to the lower end of the weighing platform rib plate, the elastic strain beam is used for supporting a weighing loader and a vehicle passing through the weighing loader, all pressure borne by the weighing loader is completely concentrated on the elastic strain beam in the working process of the automatic vehicle weighing apparatus, a weighing sensor mounting hole is formed in the surface of the elastic strain beam, a weighing sensor 11 is fixedly connected in the weighing sensor mounting hole, and the pressure borne by the elastic strain beam is captured by a weighing sensor in the weighing sensor mounting hole through deformation of the weighing sensor mounting hole in the elastic strain beam and is converted into weight data, so that the vehicle running through the weighing loader is weighed.
The hole 5 is repaiied with the inside communicating accent of the loader that weighs is seted up on the weighing platform panel surface, transfer and repair the apron that fixedly connected with flushed with the weighing platform panel on the hole 5, after the installation of the automatic weighing apparatus of vehicle was accomplished, when needing later stage regulation and control maintenance, the staff will lap and open, regulate and control or repair through the inside components and parts of the loader of the weighing of accent hole 5, will lap after the repair is accomplished and close. The anti-skidding grooves 14 are formed in the surface of the weighing platform panel, so that the running safety of passing vehicles can be guaranteed in rainy and snowy severe weather.
The inner surface of the weighing loader is fixedly connected with the temperature sensing module 12, the current environment temperature is measured in real time through the temperature sensor, and the current environment temperature and the current vehicle weight data measured by the weighing sensor are uploaded to the comprehensive analysis system.
The inner surface of the weighing carrier frame body 2 is fixedly connected with a drain pipe 6 and a threading pipe 7, the drain pipe is fixed on the inner bottom surface of the weighing carrier frame body, the drain pipe is in butt joint with an external drainage system, when rainwater is gathered inside the weighing carrier frame body, accumulated water can be timely discharged through the drain pipe at the bottom of the weighing carrier frame body, the threading pipe is fixed on the inner top surface of the weighing carrier frame body 2 and used for threading and protection of cables of electrical equipment such as a weighing sensor and a temperature sensor, meanwhile, the threading pipe is arranged on the inner top surface of the weighing carrier frame body, and influence of rainwater and the like received by electric power can be avoided as much as possible. Fixedly connected with sealing strip 13 in the seam that links up of loader and the loader framework of weighing, antiseep sealing strip is used for weighing the sealed of side seam between loader 1 and the loader framework 2 of weighing, and silt flows into the balance body inner chamber when preventing road ponding, causes the silt siltation.
When the automatic weighing apparatus of the vehicle needs to be calibrated, firstly, a worker opens the fastening bolts at two ends of the upper surface of the weighing carrier frame, places the calibrating device matched with the calibrating holes on the weighing carrier frame, fixes the calibrating device on the weighing carrier frame through the fastening bolts, applies a certain pressure to the symmetrical table panel through a pressing piece between the scale table panel and the calibrating device of the weighing carrier, wherein the pressing piece can be a hydraulic device, compares data displayed by a weighing sensor in the automatic weighing apparatus of the vehicle, and if the weighing data displayed by the weighing sensor is different from a pressure value applied by the symmetrical table panel, and adjusting and calibrating the weighing data displayed by the weighing sensor to the pressure value, opening the fastening bolt after calibration is completed, removing the calibration pile, and screwing the fastening bolt into the calibration fixing hole.
As shown in fig. 9, the calibration device is connected to the weighing sensor built in the weighing carrier 1 through a calibration control device, the calibration control device includes a control host, a hydraulic part connecting the control host to the calibration device, and a weighing instrument connected to the control host, the weighing instrument of the automatic weighing apparatus of the vehicle is connected to the weighing sensor, the hydraulic part includes a hydraulic servo system and a hydraulic cylinder device, and under the action of the control host, the hydraulic part can be controlled according to a set program to apply a preset pressure value to the weighing carrier 1 in the calibration process, and meanwhile, the control host can track and record the pressure value applied to the automatic weighing apparatus of the vehicle by the hydraulic part to the weighing carrier 1, and can monitor the data displayed by the weighing instrument of the automatic weighing apparatus of the vehicle in real time, and compare the pressure value displayed by the calibration device and the data displayed by the weighing instrument, And (5) analyzing and self-calibrating. Through introducing weighing control device, can carry out accurate control to the pressure of applying on the automatic weighing apparatus of vehicle on the one hand, on the other hand can save the manual work and carry out the operation of contrast and calibration to data, makes calibrating device accurate more swift to the calibration of the automatic weighing apparatus of vehicle.
The calibrating device is small in size and convenient to transport, and meanwhile, the calibrating device is matched with the automatic weighing apparatus of the vehicle for use, so that the mounting and dismounting are more convenient, the calibrating working efficiency is improved, and meanwhile, the calibrating expense is obviously reduced; meanwhile, the calibration device occupies less lane space, is convenient to operate even in a narrow lane environment, effectively reduces potential safety risks of roads, and guarantees smooth traffic of the lane during calibration operation to the maximum extent.
In the process of calibrating the automatic vehicle weighing apparatus, generally, after the automatic vehicle weighing apparatus is initially installed, the automatic vehicle weighing apparatus needs to be calibrated for one time; in the use, when environmental factors such as external temperature change, need carry out calibration once more or many times to the automatic weighing apparatus of vehicle to guarantee the weighing precision of weighing carrier.
The loader leveling roof beam 3 of weighing that the loader framework lower extreme fixedly connected with that weighs played supporting role, leveling roof beam lower extreme fixedly connected with a plurality of is used for calibrating the levelling device 8 of relative angle between framework and the bottom surface, and the loader framework of weighing in this embodiment is the cuboid, and four levelling devices 8 are fixed respectively at four edges of the loader framework of weighing, and the staff lays after the loader framework of weighing and accomplishes and then adjusts respectively the levelling device, makes the loader framework of weighing flush with the highway respectively.
The horizontal side edge of the weighing carrier is at an off-angle of 1.5-5 degrees with the vertical direction, and the construction standard of 'high in the middle and low in two sides' needs to be met in the road surface construction of a highway, as shown in fig. 6, the weighing carrier is embedded and installed on lanes on two sides of the road surface, and the horizontal side edge of the weighing carrier in the invention is at a certain offset angle with the vertical direction, so that the weighing carrier can be just level with the road surface of 'high in the middle and low in two sides' after being embedded into the ground.
The butt joint fixed orifices 9 of symmetry are seted up respectively to the horizontal both sides face of loader of weighing, and when the horizontal width broad of highway, set up the lane when more, need install on the highway and set up a plurality of automatic weighing apparatus of vehicle, through the butt joint fixed orifices of the automatic weighing apparatus of vehicle loader both sides face, the staff of being convenient for is to the concatenation and the fixed of a plurality of loaders of weighing, and the staff of being convenient for is simultaneously to the calibration and the fixed of the loader mounted position of weighing.
The weighing detection system also comprises a digital-analog collector used for receiving signals output by the analog quantity amplifier, the digital-analog collector is also used for receiving signals output by the vehicle separation equipment, the digital-analog collector is connected with the weighing controller, the vehicle separation equipment in the weighing detection system is used for detecting and recording relative displacement between the vehicle and the flat plate type weighing carrier, the vehicle separation equipment is connected with the digital-analog collector, the vehicle separation equipment can be but not limited to an assembly of a ground sensing coil and a vehicle detector, an infrared vehicle separator and a laser separator, when the vehicle separation equipment is the assembly of the ground sensing coil and the vehicle detector, the ground sensing coil is pre-embedded at two sides of the flat plate type weighing carrier and respectively comprises an entrance end ground sensing coil and an exit end ground sensing coil, and the ground sensing coil is used for detecting the entrance and exit of the vehicle into and out of the flat plate type weighing carrier, before the vehicle drives into the flat plate type weighing loader, the vehicle can enter the region of the pre-buried drive-in end ground induction coil, the vehicle detector starts the trigger state at the moment, after the vehicle passes through the flat plate type weighing loader, the vehicle enters the region of the pre-buried ground induction coil of the drive-out end, and when the vehicle completely passes through the pre-buried ground induction coil of the drive-out end, the vehicle detector closes the trigger state.
When the vehicle separation equipment is the infrared vehicle separator, the infrared vehicle separator comprises an infrared transmitter and an infrared receiver which are arranged on two sides of a lane, when a vehicle passes through the infrared vehicle separator, the transmitted infrared rays can be blocked, and data such as the driving-in and the driving-out of the vehicle passing through the weighing loader are judged in the mode. The infrared vehicle separator is generally suitable for weighing and separating vehicles at the entrance (exit) of a single lane or a highway due to the particularity of detection equipment.
When the vehicle separation equipment is a laser vehicle divider, the laser vehicle divider emits laser to a weighing road surface, and when the vehicle passes through a weighing area, the laser vehicle divider can detect the states of the vehicle, such as the speed, the number of axles, single tires and double tires, and separate the vehicle passing through the weighing loader.
The operation process of the vehicle separation device is as follows: when a vehicle to be detected enters a weighing area, the vehicle enters a detection area of a vehicle separation device, the vehicle separation device (a ground induction coil + a vehicle detector, an infrared vehicle separator or a laser vehicle separator) detects that the vehicle enters, starts a trigger state and sends a vehicle entering signal to a data acquisition unit; the method comprises the following steps that a vehicle to be detected runs through a flat plate type weighing loader, weighing sensors sequentially detect weighing data of corresponding tires of the vehicle, the data are sent to an analog amplifier in real time, and the analog amplifier processes received weighing detection data and sends the processed weighing detection data to a data acquisition unit; the method comprises the steps that a vehicle to be detected exits a weighing area, the vehicle exits a detection area of a vehicle separation device, the vehicle separation device (a ground induction coil and a vehicle detector, or an infrared vehicle separator, or a laser vehicle separator) detects that the vehicle exits, a trigger state is closed, and a vehicle exit signal is sent to a data acquisition unit.
The vehicle separation equipment can automatically and accurately separate the vehicles, can effectively eliminate the vehicle following phenomenon caused by small queuing distance of the vehicles, and can distinguish a semi-trailer, a full trailer and a single vehicle and accurately separate the vehicles; and ensuring the one-to-one correspondence of the weighing detection data and the vehicle.
A method of weighing a weighing system for a road vehicle, comprising:
firstly, starting a vehicle separation device in a triggering state when a vehicle to be detected enters a weighing area, and starting weighing data acquisition by a weighing controller; the weighing sensor sequentially collects tire weighing data of the vehicle, transmits the data to the weighing controller, and performs comprehensive calculation to obtain weighing data M of the vehicle;
step two, the temperature acquisition controller detects data of a plurality of built-in temperature sensors in the automatic weighing apparatus of the vehicle in real time and sends the data detected by the temperature sensors to the weighing controller;
thirdly, the weighing controller repeatedly learns by self according to the set temperature threshold and the set weighing threshold, calculates and records the error correction rate of the weighing loader under different temperature conditions (the temperature conditions comprise the temperature of each component inside the automatic weighing machine of the vehicle and the temperature of the external environment), and searches the history closest to the current temperature by combining the current temperature conditionError correction rate under the condition of NnAnd the actual weighing data of the vehicle obtained by the weighing controller is Zn＝M-Nn×M。
The detailed process in the step one is as follows: when a vehicle to be detected enters a weighing area, starting a trigger state of the vehicle separation equipment, sending a vehicle entering signal to a digital-analog collector, sending the vehicle entering signal to a weighing controller by the digital-analog collector, and starting weighing data acquisition by the weighing controller; the weighing sensor sequentially collects tire weighing data of the vehicle, the data are transmitted to the weighing controller through the analog quantity amplifier and the digital-analog collector, and the weighing controller synchronously analyzes and calculates the current weighing data of the vehicle to be detected; and when the vehicle to be detected moves away from the weighing area, the vehicle separation equipment is in a closed trigger state, and sends a vehicle moving-out signal to the digital-analog collector, the digital-analog collector sends the vehicle moving-out signal to the weighing controller, and the weighing controller closes weighing data collection and obtains current weighing data M of the vehicle to be detected through comprehensive calculation.
In the step one, the flat plate type weighing loader is used for weighing the vehicle to obtain weighing data, in the step two and the step three, the temperature acquisition controller and the weighing controller are used, the error correction rate closest to the current temperature in the historical data of the weighing controller can be called according to the current temperature data, and the obtained weighing data are corrected and calculated again according to the error correction rate.
In the third step, the method for self-learning of the weighing controller comprises the following steps:
s1, after the lane laying and installation of the weighing loader are finished, calibrating and calibrating the weighing loader, and simultaneously recording the temperature data detected by the temperature acquisition controller by the weighing controller;
s2, switching the weighing controller to be in a self-learning mode, periodically calibrating the weighing load carrier again, recording the temperature data T1 detected by each temperature acquisition controller at the moment by the weighing controller, loading X tons of gravity on the weighing load carrier, wherein the weighing display data of the weighing load carrier is Y, and the error correction rate is Y
S3, repeating the step S2, and recording the temperature data of each temperature acquisition controller at T by the weighing controller2、T3、T4...TnThen, the value of the weight carrier is calibrated again to respectively obtain the error correction rate N under the corresponding temperature2、N3、N4...Nn。
By the self-learning method of the weighing controller, the error correction rate under each temperature can be automatically updated and stored, the same or similar temperature data can be found in historical data of the temperature when the vehicle is weighed, the error correction rate under the corresponding temperature data is obtained, and the weighing controller obtains the weight data which is closest to the actual weight of the vehicle through a calculation formula. When the automatic weighing apparatus of the road vehicle is periodically calibrated, the weighing controller can also be combined with the current ambient temperature to automatically update and correct the compensation correction threshold value of the corresponding temperature section, and along with the increase of the calibration times, the weighing controller can continuously learn and update the temperature compensation correction threshold value according to different ambient temperatures, so that the weighing controller can more effectively eliminate the influence caused by the ambient temperature of the system in different temperature sections of high temperature, low temperature and the like, and can output more objective and accurate weighing results.
When the automatic weighing system and the method are used, the influence of the external temperature and the internal temperature of the automatic weighing machine of the vehicle can be removed in a targeted manner, and meanwhile, the damage of equipment and the reduction of weighing precision after the automatic weighing machine of the vehicle is used for a long time can be effectively eliminated by combining the structural improvement of the automatic weighing machine of the vehicle in the weighing system, so that the damage rate of the automatic weighing machine of the vehicle is reduced to a certain extent; in the process of temperature error correction, the invention can not only preset the correction threshold value of factory temperature compensation for the weighing controller according to historical empirical values, but also can timely update the correction threshold value of the correction temperature compensation according to calibration and calibration at different environmental temperatures on site, and automatically learn and accumulate the empirical values of the error correction at different historical temperatures, so that the weighing result tends to be objective and accurate.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (9)
1. A weighing system for road vehicles, the weighing system comprising: weighing detecting system and weighing correction system, weighing detecting system includes:
the automatic weighing apparatus comprises a weighing carrier and a weighing carrier frame for supporting the weighing carrier; the automatic weighing apparatus for a vehicle specifically includes: a weighing platform panel (15) for forming a weighing carrier and a plurality of groups of weighing platform rib plates (16) which are vertical to the weighing platform panel; the elastic strain beam (10) is fixed at the lower end of the weighing platform panel (15), and a weighing sensor mounting hole is formed in the elastic strain beam; a load cell (11) fixed in the load cell mounting hole; a deflection angle of 1.5-5 degrees is formed between one transverse side edge of the weighing carrier frame body and the vertical direction, a leveling beam (3) which plays a supporting and leveling role is fixedly connected to the bottom of the weighing carrier frame body, and a plurality of leveling devices (8) used for calibrating the relative flatness between the upper surface of the weighing carrier and a lane road surface are fixedly connected to the two ends of the leveling beam;
the vehicle separation equipment is used for detecting and recording relative displacement data between the vehicle and the vehicle automatic weighing apparatus;
the analog quantity amplifier is used for amplifying and outputting a weighing signal of the weighing loader;
the weighing correction system comprises: the weighing controller is arranged in the automatic weighing apparatus for detecting the real-time temperature of each part in the automatic weighing apparatus, the weighing controller is connected with the temperature acquisition controller and comprehensively analyzes and judges weighing data and temperature detection data in the weighing detection system.
2. The weighing system of claim 1, wherein the weighing detection system further comprises a digital-to-analog collector for receiving the output signal of the analog amplifier, the digital-to-analog collector is further for receiving the output signal of the vehicle separation device, and the digital-to-analog collector is connected with the weighing controller.
3. The weighing system of claim 1, wherein the vehicle separation device comprises a ground sensing coil embedded in the ground for detecting the relative displacement between the vehicle and the weighing carrier, and a vehicle detector electrically connected with the ground sensing coil, and the vehicle detector is connected with the digital-analog collector.
4. The weighing system of claim 1, wherein the weighing carrier has a temperature sensing module (12) fixedly connected to an inner surface thereof, and the weighing carrier frame has a drain pipe (6) and a threading pipe (7) fixedly connected to an inner surface thereof; fixedly connected with sealing strip (13) in linking up the seam of weighing carrier and weighing carrier framework, calibration fixed orifices (4) have all been seted up to the both sides of weighing carrier framework upper surface.
5. A road vehicle weighing system as claimed in claim 4, wherein the automatic vehicle scale further comprises: the calibration device (20) is arranged on the upper surface of the weighing carrier frame body (2) and detachably connected with the weighing carrier frame body (2), and is connected with the weighing sensor through the calibration control device.
6. The weighing system for road vehicles according to claim 4, wherein the weighing platform panel is provided with a panel anti-skid groove (14) on the surface, the calibration fixing hole (4) formed on the upper surface of the weighing carrier frame body (2) is connected with a fastening bolt in a threaded manner, and the two lateral side surfaces of the weighing carrier frame body (2) are respectively provided with symmetrical butt joint fixing holes (9).
7. A method of weighing a weighing system for road vehicles according to any one of claims 1 to 6, comprising:
step one, a vehicle to be detected drives into a weighing area, a vehicle separation device is started to be in a trigger state, and a weighing controller starts weighing data acquisition; the weighing sensor sequentially collects tire weighing data of the vehicle, transmits the data to the weighing controller, and comprehensively calculates to obtain weighing data M of the vehicle;
step two, the temperature acquisition controller detects data of a plurality of built-in temperature sensors in the automatic weighing apparatus of the vehicle in real time and sends the data detected by the temperature sensors to the weighing controller;
thirdly, the weighing controller repeatedly learns by itself according to the set temperature threshold and the set weighing threshold, calculates and records the error correction rate of the weighing loader under different temperature conditions, and searches the error correction rate N which is most similar to the error correction rate under the current temperature condition in history by combining the current temperature conditionnThe actual weighing data of the vehicle obtained by the weighing controller are
。
8. A weighing method of a weighing system for road vehicles according to claim 7,
the method for self-learning of the weighing controller in the third step comprises the following steps:
s1, after the lane laying and installation of the weighing loader are finished, calibrating and calibrating the weighing loader, and simultaneously recording the temperature data detected by the temperature acquisition controller by the weighing controller;
s2, switching the weighing controller to be in a self-learning mode, periodically calibrating the weighing load carrier again, recording the temperature data T1 detected by each temperature acquisition controller at the moment by the weighing controller, loading X tons of gravity on the weighing load carrier, wherein the weighing display data of the weighing load carrier is Y, and the error correction rate is Y
；
S3, repeating the step S2, and recording the temperature data of each temperature acquisition controller at T by the weighing controller2、T3、T4...TnThen, the value of the weight carrier is calibrated again to respectively obtain the error correction rate N under the corresponding temperature2、N3、N4...Nn。
9. The method of claim 8, wherein the temperature data in S1 includes temperature data of each component of the flat plate type weighing carrier and ambient temperature data.
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