CN202710155U

CN202710155U - Vehicle dynamic weighing system

Info

Publication number: CN202710155U
Application number: CN201220418243.3U
Authority: CN
Inventors: 胡平; 黄晓; 吕奎
Original assignee: SICHUAN MINKO ELECTR-MECHANIGAL ENGINEERING CO LTD
Current assignee: SICHUAN MINKO ELECTR-MECHANIGAL ENGINEERING CO LTD
Priority date: 2012-08-22
Filing date: 2012-08-22
Publication date: 2013-01-30
Anticipated expiration: 2022-08-22

Abstract

The utility model discloses a vehicle dynamic weighing system, which comprises a weighing sensor. The weighing sensor comprises two groups of quartz sensors which are laid along the road direction; and each group of the quartz sensors comprises two quartz piezoelectric sensors laid along the road direction, wherein the two quartz piezoelectric sensors in a first group of the quartz sensors are respectively transversely arranged on a left lane at a front position and a back position, the two quartz piezoelectric sensors in a second group of the quartz sensors are respectively transversely arranged on a right lane at a front position and a back position, and the first group of the quartz sensors and the second group of quartz sensors are arranged in a staggered manner. The four quartz piezoelectric sensors are employed, thereby effectively reducing weighing deviation caused by road roughness or vehicle vibration; the groups of quartz sensors are laid in a parallel and staggered manner, so that abnormal vehicle passing-by can be effectively identified and handled; and even if the vehicle passes through a sensor laying road section at a non-uniform velocity or in an 'S' shape, the deviation is corrected through detection data of the two groups of the quartz sensors, so that the weighing result is more accurate.

Description

A kind of vehicle dynamic weighing system

Technical field

The utility model relates to the field of weighing, and relates in particular to a kind of vehicle dynamic weighing system.

Background technology

Existing vehicle dynamic weighing is general to adopt single quartz transducer that the track is covered, and detects pressure and the speed of passing through each the axle road pavement of vehicle on it by quartz transducer, then calculates each axle weight and the car load general assembly (TW) of this car with embedded computer.Its computing formula is:

Axle weight=axletree speed/sensor width * piezoelectricity integral of pulse shape area * correction coefficient

The heavy sum of car load general assembly (TW)=each axle

By top formula as can be known, at the uniform velocity by complete vehicle weight and the actual car weight that draws deviation will appear when vehicle is non-.Therefore single quartz transducer can not solve vehicle abnormality by the time deviation of weighing that causes.And quartz transducer is subjected to the impact of road out-of-flatness and Vehicular vibration, and weighing results and actual weight also deviation can occur.Guarantee that the result of weighing was accurate when vehicle passed through from single quartz transducer, sensor accuracy, installation quality, road evenness and vehicle are all proposed high requirement by the speed of a motor vehicle, it is larger that Practical Project is implemented difficulty.

The utility model content

The purpose of this utility model provides a kind of vehicle dynamic weighing system, solve existing single quartz weighing system abnormal conditions are processed imperfection, situation that weighing precision is inadequate, a kind of vehicle dynamic weighing system is provided, by four parallel staggered being laid on the weight vehicle road of quartzy sensor, unusual travel situations when effectively the identifying processing vehicle is by the sensor highway section improves weighing precision.

In order to realize above-mentioned utility model purpose, the utility model provides a kind of vehicle dynamic weighing system, comprise LOAD CELLS, described LOAD CELLS comprises two groups of quartz transducer groups of laying along road direction, and every group of quartz transducer group comprises two quartz piezoelectric sensors of laying along road direction; Two quartzy piezoelectric sensors in first group of quartz transducer group one in front and one in back are horizontally installed on respectively left-hand lane; Second group of quartz transducer group and first group of quartz transducer group are crisscross arranged, and two quartzy piezoelectric sensors in second group of quartz transducer group one in front and one in back are horizontally installed on right-hand lane.The length of every quartzy piezoelectric sensor be the lane width value 2/5-3/5 between, and not on the same group the length value addition of two quartzy piezoelectric sensors in the quartz transducer be equal to or greater than the lane width value.

Preferably, the fore-and-aft clearance between two quartzy piezoelectric sensors in every group of quartz transducer group is identical, and scope is 300mm-600mm; Between second group of quartz transducer group and the first group of quartz transducer group to be staggered front to back distance be 300 ~ 600mm.

Preferably, the fore-and-aft clearance between two quartzy piezoelectric sensors in every group of quartz transducer group is 400mm; Longitudinal separation between second group of quartz transducer group and the first group of quartz transducer group is 400mm.

Compared with prior art, the utlity model has following beneficial effect:

LOAD CELLS in the utility model vehicle dynamic weighing system, adopt two groups of quartz transducers to be laid on the track, can effectively reduce because the deviation of weighing that Uneven road and Vehicular vibration cause, and because the parallel staggered paving mode of two groups of quartz transducer groups, can effectively identify and process unusual travel situations, even at the uniform velocity lay the highway section by sensor when vehicle is non-, also can revise deviation by the detection data of two groups of quartz transducers, make weighing results more accurate.

Description of drawings

In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing:

Fig. 1 is the paving location synoptic diagram of LOAD CELLS in the utility model embodiment vehicle dynamic weighing system.

Embodiment

Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.

Among the utility model embodiment, vehicle dynamic weighing system comprises LOAD CELLS, and described LOAD CELLS comprises two groups of quartz transducer groups of laying along road direction, and every group of quartz transducer group comprises two quartz piezoelectric sensors of laying along road direction; Two quartzy piezoelectric sensors in first group of quartz transducer group, one in front and one in back being horizontally installed on respectively second group of quartz transducer group of left-hand lane and first group of quartz transducer group is crisscross arranged, two quartzy piezoelectric sensors in second group of quartz transducer group one in front and one in back are horizontally installed on right-hand lane.Described two groups of quartz transducer groups are laid in the weight metering charging track as the LOAD CELLS in the weighing system, apart from tollbooth 18m between the 24m.

Referring to Fig. 1, be the paving location synoptic diagram of LOAD CELLS in the utility model embodiment vehicle dynamic weighing system.Described LOAD CELLS comprises two groups of quartz transducer groups, and every group of quartz transducer group comprises two quartzy piezoelectric sensors, the length of every quartzy piezoelectric sensor for for the lane width value 2/5-3/5 between.In Fig. 1, C1, C2, C3, C4 represent respectively a quartzy piezoelectric sensor, and wherein C1, C2 are that one group of quartz transducer group, C3, C4 are one group.Among Fig. 1, the L1 span is: 300mm ~ 600mm(direction of traffic is for just), the L2 span is: 300mm ~ 600mm, the L3 span is: 300mm ~ 600mm(direction of traffic is for just).

Two quartzy piezoelectric sensors in first group of quartz transducer group, one in front and one in back be horizontally installed on respectively left-hand lane, be combined as first group of quartz transducer group such as C1, C2 among Fig. 1, from garage's direction, quartz piezoelectric sensor C1, C2 are horizontally installed on left-hand lane, so that vehicle is when this track, left side wheel is pressed on C1, the C2, twice same wheel weight of duplicate measurements.Every group of sensor (C1, C2; C3, C4) length can take symmetrical or asymmetric laying, and wide such as the track is 3m, then can choose the length value of C1, C2 and the length value of C3, C4 and be 1.5m; The track is wide to be 3.25m, and the length value that then can choose C1, C2 is 1.75m, and the length value of C3, C4 is 1.5m.

Second group of quartz transducer group and first group of quartz transducer group two the quartzy piezoelectric sensors in (such as Fig. 1, C1, C2 group and C3, C4 group is staggered lays) second group of quartz transducer group that are crisscross arranged one in front and one in back are horizontally installed on right-hand lane; Be combined as second group of quartz transducer group such as C3, C4 among Fig. 1, quartz piezoelectric sensor C3, C4 are horizontally installed on right-hand lane, so that vehicle is when this track, right side wheels is pressed on C3, the C4, fore-and-aft clearance between two quartzy piezoelectric sensors in every group of quartz transducer group of twice same wheel weight of duplicate measurements is identical, scope is 300mm-600mm, it is the fore-and-aft clearance between C1 among Fig. 1, the C2, the fore-and-aft clearance that reaches between C3, the C4 can be 300mm-600mm, is preferably 400mm in the utility model.And between second group of quartz transducer group and the first group of quartz transducer group be staggered front to back distance for 300mm ~ 600mm(direction of traffic for just), be that fore-and-aft clearance between C1, C2 or C3, the C4 is 300mm ~ 600mm, be preferably 400mm in the utility model.

The utility model vehicle dynamic weighing system also comprises charge amplifier and controller, and charge amplifier is connected between LOAD CELLS and the controller.The waveform signal that LOAD CELLS produces when wheel rolls is transferred to controller after charge amplifier amplifies, controller calculates vehicle weight according to waveform signal.After LOAD CELLS lays according to the mode of Fig. 1, need to the value of the fore-and-aft clearance between two quartzy piezoelectric sensors in every group of quartz transducer group is pre-stored in controller.When vehicle is laid the highway section by LOAD CELLS, as long as having wheel to roll, quartz piezoelectric sensor C1, C2, C3, C4 will produce corresponding waveform signal, take the front-wheel of a car during by LOAD CELLS as example: the near front wheel can roll C1 and C2 successively, off-front wheel can roll C3 and C4 successively, and each quartz piezoelectric sensor all can produce a waveform signal and send in the controller.Controller can calculate respectively a car weight value according to the waveform signal that every group of quartz transducer produces, and each car weight value that then will calculate is averaging, and obtains final vehicle weighing value.

Wherein, the waveform signal that controller produces according to every group of quartz transducer calculates respectively the detailed process of a car weight value, can illustrate with following example that in conjunction with Fig. 1 wherein: the fore-and-aft clearance of C1 and C2 represents that with s1 the fore-and-aft clearance between C3 and the C4 represents with s2.

After controller receives waveform signal from LOAD CELLS, the resolve of wave shape that the waveform that sends according to C1 and C2 send goes out vehicle by the time t1 of s1 distance, the resolve of wave shape that the waveform that sends according to C3 simultaneously and C4 send go out vehicle by the time t2(of s2 distance because temporal information is contained in the waveform signal the inside, therefore very easy by the time by waveform signal analysing segment distance vehicle).Then calculate respectively an axletree speed with s1/ t1 and s2/ t3, formula calculates respectively a car weight value below two the axletree speed substitution that will calculate at last:

The heavy sum of car weight value=each axle

Wherein, the waveshape that piezoelectricity integral of pulse shape area returns according to the quartz piezoelectric sensor, and correction coefficient is to preset in the controller, sensor width is stored in the controller after measuring according to actual conditions, usually the width of quartz piezoelectric sensor is 70mm, the account form of piezoelectricity integral of pulse shape area and above-mentioned computing formula are existing common technology, do not do too much at this and give unnecessary details.

Two car weight values that controller will calculate at last are averaging, and obtain final vehicle weighing value, and in vehicle metering system, controller is sent to the cash readout place with this value, as one of metering data after calculating final vehicle weighing value.

Because LOAD CELLS comprises two groups of quartz transducer groups in the utility model, have 4 quartzy piezoelectric sensors altogether, can effectively reduce because the deviation of weighing that Uneven road or Vehicular vibration cause, and because the parallel staggered paving mode of two groups of quartz transducer groups, can effectively process abnormal conditions, even when vehicle at the uniform velocity non-or walk " S " type route and lay the highway section by sensor, also can average to revise deviation by the result of calculation of two groups of quartz transducers, make weighing results more accurate.

Disclosed all features in this instructions, or the step in disclosed all methods or the process except mutually exclusive feature and/or step, all can make up by any way.

Disclosed arbitrary feature in this instructions (comprising any accessory claim, summary and accompanying drawing) is unless special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is, unless special narration, each feature is an example in a series of equivalences or the similar characteristics.

The utility model is not limited to aforesaid embodiment.The utility model expands to any new feature or any new combination that discloses in this manual, and the arbitrary new method that discloses or step or any new combination of process.

Claims

1. a vehicle dynamic weighing system comprises LOAD CELLS, it is characterized in that, described LOAD CELLS comprises two groups of quartz transducer groups of laying along road direction, and every group of quartz transducer group comprises two quartz piezoelectric sensors of laying along road direction;

Two quartzy piezoelectric sensors in first group of quartz transducer group one in front and one in back are horizontally installed on respectively left-hand lane;

Second group of quartz transducer group and first group of quartz transducer group are crisscross arranged, and two quartzy piezoelectric sensors in second group of quartz transducer group one in front and one in back are horizontally installed on right-hand lane.

2. the system as claimed in claim 1 is characterized in that:

Fore-and-aft clearance scope between two quartzy piezoelectric sensors in every group of quartz transducer group is 300mm ~ 600mm;

The distance that is staggered front to back between second group of quartz transducer group and the first group of quartz transducer group is 300mm ~ 600mm;

The length of every quartzy piezoelectric sensor be the lane width value 2/5-3/5 between, and not on the same group the length value addition of two quartzy piezoelectric sensors in the quartz transducer be equal to or greater than the lane width value.