CN1707228A - Axle loading measuring apparatus and method for running vehicle - Google Patents
Axle loading measuring apparatus and method for running vehicle Download PDFInfo
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- CN1707228A CN1707228A CN 200410027672 CN200410027672A CN1707228A CN 1707228 A CN1707228 A CN 1707228A CN 200410027672 CN200410027672 CN 200410027672 CN 200410027672 A CN200410027672 A CN 200410027672A CN 1707228 A CN1707228 A CN 1707228A
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Abstract
The measuring device for shaft load of running vehicle includes at least two piezoelectric sensors for measuring the shaft load of running vehicle; camera for photographing the vehicle; and control case for processing signals from the piezoelectric sensors, measuring load of vehicle, judging whether the vehicle is overloaded, and determining whether to transmit the taken picture to the center. The present invention makes it possible to measuring the weight of vehicle in running and the present invention has low cost owing to the cheap piezoelectric sensor.
Description
(1) technical field
The invention relates to the axle load measurement mechanism of driving vehicle and method, especially be embedded in a kind of axle load measurement mechanism and the method for driving vehicle of the axle load of piezoelectric type (piezoelectricity) inductor measurement on the road vehicle in travelling about utilization.
(2) background technology
What we used now is the fixed and portable two kinds of measurement mechanisms that vehicle stopped to be undertaken by the device of constraint overload of vehicle the vehicle axle load remeasurement.
The device of existing constraint overload of vehicle is the accurate inductor that is arranged on the outside of road, measures the fixed mensuration mode of axle load and the movable type of removable mensuration and measures mode.
But, in the middle of the above-mentioned prior art, be that low vehicle speeds is being arranged on accurate gravimetry on the accurate inductor of road outside, but because need stop vehicle, and because problems such as mensuration inductor cost cause the cost of determination problem of higher.
(3) summary of the invention
The present invention proposes in order to address the above problem, the object of the present invention is to provide a kind of axle load measurement mechanism and method of driving vehicle, the piezoelectric type inductor of low price is embedded on the road, and vehicle need not stop even also can measure axle load during high vehicle speeds.
Another object of the present invention be utilize tire device (tire model) effectively to solve the piezoelectric type inductor and the vehicle that travels between the dynamic load that produces.
In addition, another object of the present invention is to utilize the self-characteristic of piezoelectric type inductor, and promptly the inverse function of Hi-pass filter recovers to be distorted the piezoelectric type signal of exporting.
In addition, another object of the present invention is by by the piezoelectric type inductor, piezoelectric type signal monitoring loop, digital camera, the system that control chest etc. constitutes detects automatically, makes a video recording, transmits overweight vehicle, thereby effectively overloaded vehicle retrained.
The object of the present invention is achieved like this: a kind of axle load determinator of driving vehicle comprises: at least two piezoelectric type inductors, measure the axle load of the vehicle on road that travels; Camera is made a video recording to described vehicle; Control box, piezoelectric type signal from described piezoelectric type inductor output is carried out signal Processing, measure the axle load of described vehicle then, judge whether described vehicle overloads, determine whether then to be sent to the center taking the overloaded vehicle that obtains from described camera.
A kind of axle load assay method of driving vehicle comprises following operation steps:
First step with the axle load calculating mean value that each piezoelectric type inductor is measured, judges then whether the value that calculates has surpassed the overload limit; Second step if the value that calculates in the first step has surpassed the overload limit, uses camera that overloaded vehicle is taken, and is sent to the center by network.
A kind of axle load assay method of driving vehicle comprises:
First step is to sampling from the piezoelectric type signal of piezoelectric type inductor output; Second step is utilized piezoelectric type inductor self-characteristic, that is, the inverse function of Hi-pass filter is recovered the described piezoelectric type signal that is sampled; Third step is obtained the central peak value corresponding to vehicle weight of the described digital signal that is resumed; The 4th step is utilized the relational expression of the power that described peak value and piezoelectric type inductor receive, that is Trendline, obtains the corresponding power Fp of determined peak value; The 5th step is utilized tire device, obtains tire and touches the shared ratio α of power that the piezoelectric type inductor receives in the ground power.The 6th step divided by the ratio α in described the 5th step, is measured the axle load that obtains vehicle with the corresponding power Fp of determined peak value in described the 4th step,
Effect of the present invention:
The axle load measurement mechanism and the method for the driving vehicle of the present invention that has above-mentioned formation and operate as mentioned above, can under the situation that does not stop vehicle, measure the weight of vehicle in travelling, the piezoelectric type inductor that the present invention utilizes is cheap, thereby can substitute the exact instrument of the mensuration usefulness that is used to retrain the high price that overload of vehicle uses now, reduce the cost of determinator.
In addition, using tyre device of the present invention, thereby can effectively solve identical vehicle because situations such as the atmospheric pressure state of tire, suitable dead weight capacity, draft hitch motion are applied to the dynamic load problem of piezoelectric type inductor, thereby can improve the accuracy that it is fixed that vehicle axle load is resurveyed.
In addition, even identical vehicle, the signal that the piezoelectric type inductor takes place is the value by the Hi-pass filter of the self-characteristic of piezoelectric type inductor, so according to the difference of speed, it is very big that the low frequency signal composition is distorted degree.Therefore, the present invention utilizes the inverse function of Hi-pass filter that it is recovered, thereby can measure the heavy corresponding signal of vehicle axle load.
At last, the present invention utilizes plural piezoelectric type inductor, improves the accuracy that axle load is measured, and can effectively realize the purpose of far distance automatic constraint overloaded vehicle.
For further specifying above-mentioned purpose of the present invention, design feature and effect, the present invention is described in detail below with reference to accompanying drawing.
(4) description of drawings
Fig. 1 is the block diagram in piezoelectric type inductor induction of signal of the present invention loop.
Fig. 2 is the operational flowchart of axle load assay method of the present invention.
Fig. 3 is the structure enforcement illustration that the axle load of another one embodiment of the present invention is measured system.
Fig. 4 is the operational flowchart that axle load of the present invention is measured system.
The symbol description of major part in the accompanying drawing:
10, buffering amplifier 20, reference voltage generating unit
30, amplification adjusting portion 40, analog/digital signal conversion device
50, microprocessor
(5) embodiment
Below with reference to accompanying drawings the axle load measurement mechanism of driving vehicle of the present invention and the embodiment of method are elaborated.
Fig. 1 is the block diagram in piezoelectric type of the present invention (piezoelectricity) inductor induction of signal loop.As shown in the figure, piezoelectric type inductor induction of signal of the present invention loop comprises:
One end connects the piezoelectric type inductor, and the other end connects piezoelectric type inductor induction of signal loop, to separate the buffering amplifier 10 in piezoelectric type inductor and piezoelectric type inductor induction of signal loop;
Taking-up is by the reference voltage generating unit 20 of hysteresis (hysteresis) composition of the piezoelectric type inductor signal of above-mentioned buffering amplifier 10;
To carry out the amplification adjusting portion 30 that amplification is exported then through the piezoelectric type signal that said reference voltage generating unit 20 has been taken out the hysteresis composition;
Signal from above-mentioned amplification adjusting portion 30 outputs is carried out the analog/digital signal conversion device 40 (that is the A/D converter among the figure 40) that sample conversion is digital signal and output;
The digital signal of above-mentioned analog/digital signal conversion device 40 outputs is used the microprocessor 50 that axle load is measured.
In order to separate piezoelectric type inductor and piezoelectric type inductor induction of signal loop, used buffering amplifier 10.This is in order to separate mechanical system (piezoelectric type inductor) and electronic system (piezoelectric type inductor induction of signal loop).In order to remove hysteresis composition, will cushion amplifier 10 and combine with reference voltage generating unit 20 by the piezoelectric type signal of buffering amplifier 10.
Allow signal carry out signal amplification then by the amplification adjusting portion 30 that constitutes by OP amplifying return circuit with suitable amplification ratio.Amplification adjusting portion 30 can be subjected to or constitute hardware automatically.The simulating signal of amplification is converted to digital value by the suitable sampling period through analog/digital signal conversion device 40.This digital conversion value is being used in the middle of the microprocessor 50 on axle load is measured.
Fig. 2 is the operational flowchart of axle load assay method of the present invention.As shown in the figure, axle load assay method of the present invention is characterized in that comprising:
First step S11 carries out analog/digital signal (A/D) conversion and sampling to the piezoelectric type signal from the output of piezoelectric type inductor;
The second step S12 utilizes piezoelectric type inductor self-characteristic, and promptly the inverse function of Hi-pass filter is recovered the above-mentioned piezoelectric type signal that is sampled;
Third step S13 obtains the central peak value corresponding to vehicle weight of the above-mentioned digital signal that is resumed;
The 4th step S14 utilizes the relational expression of the power that peak value and piezoelectric type inductor receive, that is Trendline (shown in input signal among Fig. 2), obtains the corresponding power Fp of determined peak value;
The 5th step S15 utilizes tire device, obtains tire and touches the shared ratio α of power that the piezoelectric type inductor receives in the ground power.
The 6th step S16,, the corresponding power Fp of determined peak value among above-mentioned the 4th step S14 divided by the ratio ratio α among above-mentioned the 5th step S15, is measured the axle load that obtains vehicle,
In the middle of the accompanying drawing, the digital value that the voltage that produces of being directly proportional with pressure that inductor receives was converted to by the appropriate sampling period is the value behind the Hi-pass filter that constitutes by the opposing of piezoelectric type inductor unique characteristics with by k (inverse function of Hi-pass filter).This value is along with the increase of car speed, and it is also big more that its signal is distorted degree.
Therefore, though identical vehicle because the value of its generation of difference of speed is also different, so, need be by evaluation before the wave filter.Utilize the inverse function of Hi-pass filter to recover digital signal.Obtain the central peak value suitable of the signal that is resumed with vehicle weight.
Utilizing the relational expression of the power Fp that above-mentioned peak value and piezoelectric type inductor receive, also is Trendline, obtains the corresponding power Fp of determined peak value.
Even because identical vehicle, because its power that is applied to inductor of difference of situations such as the atmospheric pressure state of tire, suitable dead weight capacity, draft hitch motion is also different, so need use tire device for the power that is applied to inductor in the middle of the area of obtaining the tire kiss the earth.That is, obtain the ratio α that is applied to the power of inductor in the middle of the power of tire kiss the earth.
Fig. 3 is the structure illustration that the axle load of another one embodiment of the present invention is measured system.As shown in the figure, axle load measuring system of the present invention comprises:
Travel two inductors of piezoelectric type at least (present embodiment use two piezoelectric type inductors 1,2) of axle load of the vehicle 6 on road of mensuration;
The camera 3 that above-mentioned vehicle is made a video recording;
Piezoelectric type signal from above-mentioned piezoelectric type inductor 1,2 output is carried out signal Processing, measure the axle load of vehicle 6 then, judge whether this vehicle 6 overloads, determine whether then and will take the control box 4 that the overloaded vehicle that obtains is sent to the center from above-mentioned camera 3.
Piezoelectric type inductor 1,2nd, the inductor of the axle load of mensuration vehicle 6.The purpose of camera 3 is to be used for taking overloaded vehicle.In order to access better piezoelectric type signal measuring value, can use plural inductor.
Control box 4 comprises the microprocessor that is used for handling piezoelectric type loop inductance and axle load assay method, and the shooting information with overloaded vehicle of being used for is sent to the center and receives modulator-demodular unit (modem) device and the network formations such as (network) of control signal.
In addition, in order on a plurality of traffic routes, to carry out the piezoelectric type signal Processing, can best setting and the corresponding a plurality of piezoelectric type loop inductances of traffic route quantity on control box 4.
Fig. 4 is the operational flowchart that axle load of the present invention is measured system.As shown in the figure, axle load of the present invention is measured system, comprises following operation steps,
First step S21-23 with the axle load calculating mean value that each piezoelectric type inductor is measured, judges then whether the value that calculates has surpassed the overload limit, if do not surpass the overload limit, continues to repeat this step;
The second step S31, S32 if the value that aforementioned calculation obtains has surpassed the overload limit, uses camera that overloaded vehicle is taken, and is sent to the center by network.
That is the axle load calculating mean value with the piezoelectric type inductor is measured if the value that aforementioned calculation obtains has surpassed the overload limit, uses camera that overloaded vehicle is taken, and is sent to the center by network.
Another one embodiment, the words that piezoelectric type inductor that uses in the middle of the axle load assay method that proposes and roof (ROOF) inductor are used in combination, not only can measure axle load, number of axle amount, the axle base of vehicle, and, can obtain vehicle length, car speed, whether exceed the speed limit, transport information such as severity of mixing up.Thereby can provide transport information to the driver, and then can realize more effectively that the user is to the assurance to traffic of the use of road and control center.
Though the present invention describes with reference to current specific embodiment, but those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the present invention, should understand and wherein can make variations and modifications and do not break away from the present invention in a broad sense, so be not as limitation of the invention, as long as in connotation scope of the present invention, all will drop in the scope of claims of the present invention variation, the distortion of the above embodiment.
Claims (4)
1, a kind of axle load determinator of driving vehicle is characterized in that comprising:
At least two piezoelectric type inductors are measured the axle load of the vehicle on road that travels;
Camera is made a video recording to described vehicle;
Control box, piezoelectric type signal from described piezoelectric type inductor output is carried out signal Processing, measure the axle load of described vehicle then, judge whether described vehicle overloads, determine whether then to be sent to the center taking the overloaded vehicle that obtains from described camera.
2, the axle load determinator of driving vehicle as claimed in claim 1 is characterized in that:
Piezoelectric type inductor induction of signal loop comprises:
The buffering amplifier, an end connects the piezoelectric type inductor, and the other end connects piezoelectric type inductor induction of signal loop, to separate piezoelectric type inductor and piezoelectric type inductor induction of signal loop;
The reference voltage generating unit is taken out the hysteresis composition by the piezoelectric type inductor signal of described buffering amplifier;
The amplification adjusting portion will be carried out amplification through the piezoelectric type signal that described reference voltage generating unit has been taken out the hysteresis composition and be exported then;
The analog/digital signal conversion device, it is digital signal and output that the signal from described amplification adjusting portion output is carried out sample conversion;
Microprocessor, the digital signal that described analog/digital signal conversion device is exported uses axle load mensuration.
3, a kind of axle load assay method of driving vehicle is characterized in that comprising following operation steps:
First step with the axle load calculating mean value that each piezoelectric type inductor is measured, judges then whether the value that calculates has surpassed the overload limit;
Second step if the value that calculates in the first step has surpassed the overload limit, uses camera that overloaded vehicle is taken, and is sent to the center by network.
4, a kind of axle load assay method of driving vehicle is characterized in that comprising:
First step is to sampling from the piezoelectric type signal of piezoelectric type inductor output;
Second step is utilized piezoelectric type inductor self-characteristic, that is, the inverse function of Hi-pass filter is recovered the described piezoelectric type signal that is sampled;
Third step is obtained the central peak value corresponding to vehicle weight of the described digital signal that is resumed;
The 4th step is utilized the relational expression of the power that described peak value and piezoelectric type inductor receive, that is Trendline, obtains the corresponding power Fp of determined peak value;
The 5th step is utilized tire device, obtains tire and touches the shared ratio α of power that the piezoelectric type inductor receives in the ground power.
The 6th step divided by the ratio α in described the 5th step, is measured the axle load that obtains vehicle with the corresponding power Fp of determined peak value in described the 4th step,
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410027672 CN1707228A (en) | 2004-06-10 | 2004-06-10 | Axle loading measuring apparatus and method for running vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410027672 CN1707228A (en) | 2004-06-10 | 2004-06-10 | Axle loading measuring apparatus and method for running vehicle |
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| CN1707228A true CN1707228A (en) | 2005-12-14 |
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| CN 200410027672 Pending CN1707228A (en) | 2004-06-10 | 2004-06-10 | Axle loading measuring apparatus and method for running vehicle |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102230818A (en) * | 2011-03-31 | 2011-11-02 | 西安交通大学 | Double-C-shaped piezoelectric dynamic axle load sensor |
| CN102636243A (en) * | 2012-05-08 | 2012-08-15 | 江苏苏科畅联科技有限公司 | Highway axle load dynamic data acquisition system and processing method thereof |
| CN102680064A (en) * | 2012-05-30 | 2012-09-19 | 四川兴达明科机电工程有限公司 | Vehicle dynamic weighing system |
| CN102785664A (en) * | 2012-08-13 | 2012-11-21 | 徐州重型机械有限公司 | Crane, and system and method for controlling running of overloaded vehicle according to axle load |
-
2004
- 2004-06-10 CN CN 200410027672 patent/CN1707228A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102230818A (en) * | 2011-03-31 | 2011-11-02 | 西安交通大学 | Double-C-shaped piezoelectric dynamic axle load sensor |
| CN102230818B (en) * | 2011-03-31 | 2013-04-17 | 西安交通大学 | Double-C-shaped piezoelectric dynamic axle load sensor |
| CN102636243A (en) * | 2012-05-08 | 2012-08-15 | 江苏苏科畅联科技有限公司 | Highway axle load dynamic data acquisition system and processing method thereof |
| CN102680064A (en) * | 2012-05-30 | 2012-09-19 | 四川兴达明科机电工程有限公司 | Vehicle dynamic weighing system |
| CN102785664A (en) * | 2012-08-13 | 2012-11-21 | 徐州重型机械有限公司 | Crane, and system and method for controlling running of overloaded vehicle according to axle load |
| CN102785664B (en) * | 2012-08-13 | 2016-01-20 | 徐州重型机械有限公司 | Hoisting crane and the system and method travelled according to axle load control overloaded vehicle |
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