CN104075832B - A kind of sensor construction for Wheel axle identifier, axle identification method and system - Google Patents
A kind of sensor construction for Wheel axle identifier, axle identification method and system Download PDFInfo
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- CN104075832B CN104075832B CN201410338824.XA CN201410338824A CN104075832B CN 104075832 B CN104075832 B CN 104075832B CN 201410338824 A CN201410338824 A CN 201410338824A CN 104075832 B CN104075832 B CN 104075832B
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Abstract
The invention discloses a kind of sensor construction of Wheel axle identifier, comprise N number of pressure transducer, the linearly array way arrangement of N number of pressure transducer, adjacent two pressure transducer distance X & lt; D
min-W, X & lt; W, d≤X/2, wherein D
minfor the minimum space between twin wheels of vehicle, d is sensor diameter, and W is that vehicle tyre effectively lands width.The invention also discloses simultaneously and adopt this sensor construction wheel shaft identifying system and method, this recognition system comprises sensor as aforementioned structure, N number of operational amplifier, N number of comparer, single-chip microcomputer and master control instrument, each pressure transducer is connected with an operational amplifier, each operational amplifier is connected with a comparer, each comparer is connected with the I/O mouth of monolithic, and single-chip microcomputer is connected with master control instrument.The present invention is by judging whether sensors generate signals is can be judged as single tire or twins continuously.The present invention abandons the link by traditional A/D modular converter, voltage signal being converted to digital signal, can save A/D modular converter hardware cost.
Description
Technical field
The present invention relates to a kind of metering method field, particularly a kind of sensor construction for axle identification, axle identification method and system.
Background technology
Along with the development of national economy and the acceleration of urbanization process, the ratio of the big-and-middle-sized goods stock in communications and transportation increases day by day, and the volume of traffic rises rapidly, and overload of vehicle, the phenomenon that transfinites also become more and more general and serious.The 2nd command " overload transport vehicle travels highway administration regulation " that Ministry of Communications promulgates for 2000 and national seven ministries and commissions combine " embodiment about carrying out the work of vehicle overload overload managing in the whole nation " (road of handing over to the collective or the state sends out (2004) No. 219) of issue, regulation uses the economic means combined with administration to carry out necessary law enforcement process, effectively to ensure the serviceable life of bridge and highway to the overrun vehicle passed through.Accurate detection also obtains vehicular characteristics data as much as possible, is the key foundation in highway and the field such as bridge weight metering charging, overrun vehicle law enforcement, and wherein the tyre type of vehicle is just absolutely necessary characteristic.
Wheel axle identifier also known as tire recognizer, with meter reset standby together with installs and supports the use, every arbor wheel tire number when passing through mainly for detection of vehicle, and can the coupling system allomeric function identification speed of a motor vehicle, wheel shaft, vehicle etc.Wheel axle identifier equipment is along with the implementation development of weight metering charging, and each producer, according to the different technologies grasped and principle, designs different products.
Current Wheel axle identifier divides from principle and mainly contains switching mode and pressure sensing type.In concrete structural design, the two pressure transducer arrangement mode producing voltage is basically identical, and namely every bar Wheel axle identifier installs 9 ~ 16 modules, and intermodule is apart from being about 8 ~ 15cm.The judgement principle of single two-wheel is then determined according to the position of all module output signals and quantity: when signal sum is less than or equal to certain number m (m desirable 2 ~ 5), and continuous print module has pressure wheel out-of-date, is single-wheel; When signal sum is more than or equal to certain number n (n desirable 3 ~ 6), or middle discontinuous module more than k (k desirable 1 ~ 3) is individual has pressure wheel out-of-date, is two-wheel.This judgement principle needs to determine m in advance, n, k tri-number, due to all kinds vehicle tyre effectively land width and space between twin wheels different, m, n, k tri-is worth and not easily chooses, and unified standard, does not cause the tire recognition correct rate deviation of each producer larger.
Summary of the invention
In view of this, the invention provides a kind of sensor construction for axle identification, provide a kind of new axle identification method and system simultaneously, the method is by determining whether sensor produces continuous print variable signal and determine single tire or twins, simple and reliable.
An object of the present invention is realized by such technical scheme, a kind of sensor construction for Wheel axle identifier, this sensor construction comprises N number of pressure transducer, the linearly array way arrangement of N number of pressure transducer, the distance X<D of adjacent two pressure transducers
min-W, X<W, d≤X/2, wherein D
minfor the minimum space between twin wheels of vehicle, d is the diameter of sensing mould, and W is that vehicle tyre effectively lands width.
Two of object of the present invention is realized by such technical scheme, a kind of axle identification method, by the linearly array way arrangement of N number of pressure transducer, and the distance X<D of adjacent two pressure transducers
min-W, wherein W is that vehicle tyre effectively lands width, D
minfor the minimum space between twin wheels of vehicle, when producing continuous print variable signal when wheel presses through each pressure transducer, single tire can be judged as, if the variable signal produced is discontinuous, be judged as twins.
Further, the distance of described adjacent two pressure transducers is less than vehicle tyre and effectively lands width.
Further, d≤X/2, wherein d is the diameter of sensor.
Three of object of the present invention is realized by such technical scheme, a kind of wheel shaft identifying system, comprise N number of pressure transducer, N number of operational amplifier, N number of comparer, single-chip microcomputer and master control instrument, each pressure transducer is connected with an operational amplifier, each operational amplifier is connected with a comparer, each comparer is connected with the I/O mouth of monolithic, and described single-chip microcomputer is connected with master control instrument.
Further, the linearly array way arrangement of described N number of pressure transducer, adjacent two pressure transducers distance is to each other X<D
min-W, X<W, d≤X/2, wherein D
minfor the minimum space between twin wheels of vehicle, d is the diameter of sensing mould, and W is that vehicle tyre effectively lands width.
Owing to have employed technique scheme, the present invention has following advantage:
1, according to above-mentioned pressure transducer spacing setting method, when producing continuous print variable signal when wheel presses through each pressure transducer, can be judged as single tire, if the variable signal produced is discontinuous, be judged as twins, the method is simple and reliable.
2, wheel shaft identifying system of the present invention has abandoned the link by traditional A/D modular converter, voltage signal being converted to digital signal, can save the hardware cost of A/D modular converter; Two is the comparison procedure being replaced scm software handling procedure by hardware comparator, reduces the processing expenditure of processor of single chip computer.Further, each road voltage signal automatically can amplify separately, compare, and does not interfere with each other.
Accompanying drawing explanation
In order to make the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, the present invention is described in further detail, wherein:
Fig. 1 is that tire acts on Wheel axle identifier design sketch;
Fig. 2 is the theory diagram of wheel shaft identifying system;
Fig. 3 is pressure-type axle identification process flow diagram;
Fig. 4 is the coding form figure that twins acts on Wheel axle identifier;
Fig. 5 is the coding form figure that single tire acts on Wheel axle identifier.
Embodiment
Below with reference to accompanying drawing, the preferred embodiments of the present invention are described in detail; Should be appreciated that preferred embodiment only in order to the present invention is described, instead of in order to limit the scope of the invention.
In the eurypalynous Wheel axle identifier of crowd, each pressure transducer spacing is determined very crucial, existing product rule of thumb roughly sets a numerical value usually, not rational basis, axle identification rate is uneven, the present invention summarizes a kind of new pressure transducer spacing defining method, can accurately identify vehicle tyre type.
If the diameter of pressure transducer is d, the center distance of adjacent pressure transducer is X, and the minimum space between twin wheels of vehicle is D
min, corresponding vehicle tire 1 width that effectively lands is value demand fulfillment two conditions of W, X:
1. Wheel axle identifier 3 is before design, and the center distance X value of each pressure transducer 2 is according to " truck tyre specification, size, air pressure and load " standard GB/T/T2977-2008 and install sections of road vehicle main Types and determine, so X value should be:
X<D
min-W formula (1)
The different kinds of tyre maximum use size provided by standard GB/T/T2977-2008 and minimum space between twin wheels substitute into formula (1), the adjacent dividing value of corresponding pressure transducer center distance can be calculated, therefore, in practical application, in order to effectively identify all tire type, X value is less than the adjacent dividing value minimum value of pressure transducer center distance.
2. spacing x should be less than vehicle tyre and effectively to land width W, that is:
X<W formula (2)
To ensure that vehicle tyre fully effectively can act on the pressure transducer of some.
On X value basis, pressure transducer diameter d should meet:
D≤X/2 formula (3)
In addition, length and the weighing platform of Wheel axle identifier adapt, and not only ensure that vehicle tyre acts on Wheel axle identifier completely, also need to coordinate weighing platform to calculate vehicle axle weight, gross weight.Under normal circumstances, common lane detection width 1700mm, ultra-wide lane detection width 2100mm.
Synchronization, vehicle tyre acts on the array pressure sensor contact effect of Wheel axle identifier as shown in Figure 1.
According to above-mentioned pressure transducer spacing setting method, when producing continuous print variable signal when wheel presses through each pressure transducer, single tire can be judged as, if the variable signal produced is discontinuous, be judged as twins.
This kind of axle identification judges that the method usable range of single two-wheel is not limited to switching mode and pressure sensing type, and pressure transducer arranges linearly array way substantially can be general.
According to above-mentioned thought, the invention provides a kind of sensor construction for Wheel axle identifier, this sensor construction comprises N number of pressure transducer, the linearly array way arrangement of N number of pressure transducer, the distance X<D of adjacent two pressure transducers
min-W, X<W, d≤X/2, wherein D
minfor the minimum space between twin wheels of vehicle, d is the diameter of sensing mould, and W is that vehicle tyre effectively lands width.
Wheel axle identifier adopts pressure sensing type, and its structure is simple, and easy for installation, practical application is more.The tire recognizer of this form is made up of parts such as elastic body resistance strain gage, lead-in wire and shells.When vehicle presses, elastic body carrying gravity has the deformation be directly proportional to gravity, resistance strain gage is pasted onto on elastic body, identical deformation is had with elastic body, produce resistance variable thus, supplying under bridge circuit effect, the output terminal on bridge road produces the voltage be directly proportional to gravity, thus obtains electric signal.
The ultimate principle of electric signal is produced according to pressure transducer, cross for the purpose of the discernible digital signal encoding of multiple sensor to obtain pressure wheel, and it is complicated in order to overcome existing pressure sensing type Wheel axle identifier circuit, oneself power consumption is large, between road, interference is large, the shortcoming that cost is high, the pressure sensing voltage signal of native system have employed the hardware handles pattern of " Lu-Lu amplifies; Lu-Lu compares ", one is abandoned the link by traditional A/D modular converter, voltage signal being converted to digital signal, can save the hardware cost of A/D modular converter; Two is the comparison procedure being replaced scm software handling procedure by hardware comparator, reduces the processing expenditure of processor of single chip computer.Further, each road voltage signal automatically can amplify separately, compare, and does not interfere with each other.
Native system structural design as shown in Figure 2.
The initial voltage signal produced due to pressure transducer is quite faint, so after sensor signal has to pass through the larger operational amplifier of enlargement factor, then sends into comparer corresponding to each road.The voltage signal that comparer is responsible for operational amplifier exports compares with reference voltage signal, if amplifier signal is greater than reference voltage signal, then exports high state, is less than reference voltage signal and then exports low state.Processor of single chip computer is responsible for the Transistor-Transistor Logic level signal scanning the comparer output of each road, by internal processes process, by each road pressure transducer state by exporting to master control instrument by serial ports after coding.Every road comparer exports I/O port each with single-chip microcomputer respectively and connects.Whole flow process as shown in Figure 3.
Speed when single-chip microcomputer sweep frequency mainly presses through sensor according to vehicle is determined, calculate for car speed 36km/h and 10m/s, if wheel effective pressure contact sensor diameter is 30mm, from wheel, pressure sensor is to leaving sensor, the arc length of wheel contact is actually about 200mm, and the time that therefore wheel presses through sensor is about 20ms.From mechanics, the stressed of sensor is para-curve, decaptitate in program after truncating is the effective stressed time, be approximately the half of 20ms during this period of time, namely 10ms, will judge accurately to be pressed onto sensor with or without wheel in 10ms, require that the sweep velocity of single-chip microcomputer is no less than 100Hz, in reality, the speed of a motor vehicle is uncertain, adds the requirement to reliability, and actual scanning speed is risen to 1000Hz.
Single-chip microcomputer scanning encoding can be reached an agreement on according to the actual requirements, if voltage is high state represent that tire acts on pressure transducer, voltage is that low state represents that tire does not act on pressure transducer, now scanning encoding usually the simplest form: be high state when scanning input port voltage, single-chip microcomputer control program represents with " 1 ", scanning input port voltage is low state, and single-chip microcomputer control program represents with " 0 ".In conjunction with above-mentioned axle identification method, when vehicle tyre presses through Wheel axle identifier, the scanning encoding of continuous passage there will be as Fig. 4, shown in 5, can judge vehicle tyre type thus.Fig. 4 is the coding form figure that twins acts on Wheel axle identifier; Fig. 5 is the coding form figure that single tire acts on Wheel axle identifier.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (6)
1. for a sensor construction for Wheel axle identifier, it is characterized in that: this sensor construction comprises N number of pressure transducer, the linearly array way arrangement of N number of pressure transducer, the distance X<D of adjacent two pressure transducers
min-W, X<W, d≤X/2, wherein D
minfor the minimum space between twin wheels of vehicle, d is the diameter of sensing mould, and W is that vehicle tyre effectively lands width.
2. an axle identification method, is characterized in that: by the linearly array way arrangement of N number of pressure transducer, the distance X<D of adjacent two pressure transducers
min-W, wherein W is that vehicle tyre effectively lands width, D
minthe minimum space between twin wheels of vehicle, when producing continuous print variable signal when wheel presses through each pressure transducer, can be judged as single tire, if the variable signal produced is discontinuous, be judged as twins.
3. axle identification method according to claim 1, is characterized in that: the distance of described adjacent two pressure transducers is less than vehicle tyre and effectively lands width.
4. the axle identification method according to Claims 2 or 3, is characterized in that: d≤X/2, and wherein d is the diameter of sensor.
5. a wheel shaft identifying system, it is characterized in that: comprise N number of pressure transducer, N number of operational amplifier, N number of comparer, single-chip microcomputer and master control instrument, each pressure transducer is connected with an operational amplifier, each operational amplifier is connected with a comparer, each comparer is connected with the I/O mouth of monolithic, and described single-chip microcomputer is connected with master control instrument.
6. wheel shaft identifying system according to claim 5, is characterized in that: the linearly array way arrangement of described N number of pressure transducer, adjacent two pressure transducers distance is to each other X<D
min-W, X<W, d≤X/2, wherein D
minfor the minimum space between twin wheels of vehicle, d is the diameter of sensing mould, and W is that vehicle tyre effectively lands width.
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| CN201410338824.XA CN104075832B (en) | 2014-07-16 | 2014-07-16 | A kind of sensor construction for Wheel axle identifier, axle identification method and system |
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| CN201410338824.XA CN104075832B (en) | 2014-07-16 | 2014-07-16 | A kind of sensor construction for Wheel axle identifier, axle identification method and system |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104330140B (en) * | 2014-11-07 | 2017-02-15 | 辽宁因泰立电子信息有限公司 | Method and device for identifying vehicle axle |
| CN109597963B (en) * | 2018-12-30 | 2023-06-23 | 郑州衡量科技股份有限公司 | Axle identification method of digital axle identifier |
| CN110907200A (en) * | 2019-12-10 | 2020-03-24 | 重庆唯英科技有限公司 | Single-tire and double-tire recognition system for automobile |
| CN113507494B (en) * | 2021-05-26 | 2024-06-25 | 杭州金毅科技有限公司 | Method and system for collecting source treatment super |
| CN115900904B (en) * | 2022-12-27 | 2023-10-10 | 南京力加传感技术有限公司 | Vehicle overload overrun detection method based on quartz piezoelectric wheel shaft identification |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| FR2346703A1 (en) * | 1976-03-29 | 1977-10-28 | Abg Semca | AXIAL THRUST MEASURING DEVICE OF A ROTATING MACHINE SHAFT |
| JPS57186133A (en) * | 1981-05-12 | 1982-11-16 | Mitsubishi Heavy Ind Ltd | Method and device for measuring fluid pressure of rotating shaft |
| CN201181218Y (en) * | 2008-03-17 | 2009-01-14 | 华南理工大学 | Linear array pressure-sensitive sensing equipment used for automobile wheel shaft recognition |
| CN202090301U (en) * | 2011-04-28 | 2011-12-28 | 华南理工大学 | Integral dot-matrix type pressure sensitive sensor device for motor vehicle axle identification |
| CN204085749U (en) * | 2014-07-16 | 2015-01-07 | 重庆市华驰交通科技有限公司 | A kind of sensor construction for Wheel axle identifier, wheel shaft identifying system |
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