CN201974224U

CN201974224U - Vehicle high-speed dynamic weighing system

Info

Publication number: CN201974224U
Application number: CN2010205997998U
Authority: CN
Inventors: 李建军; 田林岩; 邓永强
Original assignee: Beijing Wanji Technology Co Ltd
Priority date: 2010-11-08
Filing date: 2010-11-08
Publication date: 2011-09-14
Anticipated expiration: 2020-11-08

Abstract

The utility model provides a vehicle high-speed dynamic weighing system, which comprises two curved plate weighing sensors, a piezo-electricity film sensor, a pavement temperature sensor, two detecting coils and a set of data acquisition controller equipment, wherein the curved plate weighing sensors are laid in parallel on each lane pavement of a main road of a highway and used for collecting the dynamic data of the pressure exerted by the tires on the ground at the entire lane pavement when the vehicle passes through; the piezo-electricity film sensor is used for collecting the dynamic data of the pressure exerted by the tires on the ground at the entire lane pavement when the vehicle passes through; the pavement temperature sensor is used for detecting the pavement temperature, so as to perform temperature compensation on the weighing data; the detecting coils are used for detecting the driving traces and the speed of the vehicle; the data acquisition controller equipment is used for collecting the pressure data on the ground when the tires of the vehicle pass through the curved plate sensors and the piezo-electricity film sensor, further calculating the weight, outputting, displaying and uploading data, detecting the working states of all the sensors in real time, issuing failure prompt and automatically switching to the piezo-electricity film weighing state when the curved plate sensor fails. Through adopting the technical scheme, the system can perform dynamic weighing for all the vehicles passing through the traffic flow section, thereby not only guaranteeing the weighing precision of the system, but also guaranteeing the long-term reliability of the system.

Description

A kind of vehicle high speed dynamic weighing system

Technical field

The utility model is about weighing technology, particularly about a kind of vehicle high speed dynamic weighing system.

Background technology

The high speed dynamic weighing system is widely used in the highway section that highway main line overloaded vehicle is concentrated at present, and the pre-detection and the road traffic flow that are used for overrun vehicle detect and shunt.For traffic administration, containment overrun and overload, protection aspect such as road and bridge play an important role.

The high speed dynamic weighing system is used more complicated, and environment is more abominable.Be mainly reflected in how to adapt to round-the-clock, uninterrupted, high-intensity running environment, under the condition how big, that heavy-duty vehicle is many, guarantee system's weighing precision and functional reliability at vehicle flowrate.In case because system breaks down, very easily cause traffic congestion, and the protective effect that loses to road and bridge, therefore how to improve the stability of high speed dynamic weighing system, this is the urgent problem that current high speed dynamic weighing system faces.

Existing high speed dynamic weighing system mainly adopts the processing of weighing of single bended plate type sensor and single piezo film sensor.But all there is certain problem in actual applications in this dual mode.For example:

(1) uses the high speed dynamic weighing system of bent plate merely as LOAD CELLS.The bended plate type sensor is the strain-type structure; technology is comparatively ripe; himself weighing precision is also higher relatively; but in actual applications; the failure rate of bent plate is higher relatively, in case bent plate breaks down, system will be in complete state of paralysis; lose function of weighing, and then lose protective effect road and bridge.

(2) use the high speed dynamic weighing system of piezoelectric film merely as LOAD CELLS.Piezoelectric transducer is the piezoelectric type structure, its advantage is that reliable long-term working is better, can adapt to round-the-clock, uninterrupted, high-intensity running environment, failure rate is relatively low, but shortcoming is that weighing precision own is relatively low, occasion in that some weighing precision is had relatively high expectations can not satisfy user's requirement, can only be used in the occasion relatively low to the accuracy requirement of weighing.

The utility model content

The purpose of this utility model is to provide a kind of vehicle high speed dynamic weighing system, is used to solve all are carried out dynamic weighing by the vehicle on the traffic flow cross section.

The utility model provides a kind of vehicle high speed dynamic weighing system.This system comprises two bent plate LOAD CELLS 102, and parallel laid is used for tire ground pressure dynamic data when whole carriageway surfacing collection vehicle is passed through on each carriageway surfacing of highway main line; Article one, piezo film sensor 103, are used for tire ground pressure dynamic data when whole carriageway surfacing collection vehicle is passed through; A pavement temperature sensor 105 is used to detect pavement temperature, and then symmetrical tuple is according to carrying out temperature compensation; Two magnetic test coils 101 and 104 are used to detect vehicle driving trace and car speed; One sets of data acquisition controller equipment 106, ground pressure data when being used for the collection vehicle tire through bent plate sensor and piezo film sensor, thereby carrying out weight calculates, output shows and data upload, and detect the duty of each sensor in real time, when the bent plate sensor breaks down, carry out fault prompting, automatically switch to the piezoelectric film state of weighing.

The technical solution of the utility model can be carried out dynamic weighing to all vehicles that pass through on the traffic flow cross section.Adopt bent plate sensor and piezo film sensor co-ordination, both can guarantee the weighing precision of system, can guarantee the long-term reliability of system again.

Description of drawings

Fig. 1 is an arrangenent diagram of the present utility model;

Fig. 2 is a workflow diagram of the present utility model;

Fig. 3 is a system chart of the present utility model;

Fig. 4 is the inner composition frame chart of master control borad of the present utility model.

Embodiment

Be elaborated as follows below in conjunction with accompanying drawing to embodiment of the present utility model:

Embodiment:

Be illustrated in figure 1 as the arrangenent diagram of the utility model application example, when vehicle ' is passed through this system, left and right sides tire was pressed bent plate sensor 102 and piezo film sensor 103 successively, bent plate sensor 102 and piezo film sensor 103 write down detection information separately, and data are sent to data acquisition controller.The data acquisition controller workflow as shown in Figure 2, when bent plate sensor 102 was working properly, system handled the information of weighing that bent plate sensor 102 is gathered; When bent plate sensor 102 broke down, system can automatically switch to the piezoelectric film state of weighing, and the information of weighing that piezo film sensor 103 is gathered is handled.Data acquisition controller 106 also will be handled the information of preposition magnetic test coil 101 and 104 collections of rearmounted magnetic test coil, thereby obtain transport information such as whether a spot speed, acceleration, vehicle commander and vehicle pass through fully.Temperature sensor 305 is measured pavement temperature, and then the information of weighing is carried out temperature compensation, improves weighing precision.

Fig. 3 is the system chart of present embodiment data acquisition controller 106, data acquisition controller adopts ARM as master controller, according to function system is divided into master control borad, Weighing module, coil module, display module four module, wherein master control borad is responsible for the entire system logic realization, Weighing module is responsible for the data acquisition of weighing, coil module is responsible for detecting vehicle driving trace, and the three connects by the I2C bus.Master control borad shows data transmission again to display module.

Fig. 4 is the inside composition frame chart of master control borad, automobile when cruising, its left and right sides tire was pressed the Weighing module that is laid in the carriageway surfacing successively, the many groups electric bridge out of trim that constitutes by strain ga(u)ge in the tablet, thereby produce the uneven output signal of moment, by the data acquisition controller of signal cable biography to trackside.Weighing card wherein utilizes one group of high-speed a/d converter to convert thereof into digital signal, and through special routine processes, it is heavy with axle to calculate its wheel load, and the gross combination weight that adds up out successively.The coil module that front and back are arranged can also be measured transport information such as whether vehicle spot speed, acceleration, vehicle commander and vehicle pass through fully.After vehicle passes through fully, will judge whether vehicle transfinites according to the predetermined pigeon-hole principle that transfinites, if any transfiniting, the track alarm indication screen beyond system will control 100 meters immediately, and the warning of special-purpose audible-visual annunciator, the indication vehicle deceleration is also kept to the right.The vehicle that is prompted enters the law enforcement station and carries out the low-speed highly precise detection of transfiniting under the guiding of alarm indication screen and trackside auxiliary sign.。

Above embodiment only is used to illustrate the utility model, but not is used to limit the utility model.

Claims

1. vehicle high speed dynamic weighing system is characterized in that described system comprises:

Two bent plate LOAD CELLS, parallel laid are used for tire ground pressure dynamic data when whole track collection vehicle is passed through on each carriageway surfacing;

Article one, the piezoelectric film LOAD CELLS is used for tire ground pressure dynamic data when whole track collection vehicle is passed through;

Two magnetic test coils are used to detect vehicle driving trace and car speed;

A temperature sensor is used to gather pavement temperature, and symmetrical tuple is according to carrying out temperature compensation;

One sets of data acquisition controller equipment, ground pressure data when being used for the collection vehicle tire through bent plate sensor and piezo film sensor, thereby carrying out weight calculates, output shows and data upload, and detect the duty of each sensor in real time, when the bent plate sensor breaks down, carry out fault prompting, automatically switch to the piezoelectric film state of weighing.