CN106768229B - It can carry out the working method of the weighing system of type of vehicle differentiation - Google Patents
It can carry out the working method of the weighing system of type of vehicle differentiation Download PDFInfo
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- CN106768229B CN106768229B CN201611254887.2A CN201611254887A CN106768229B CN 106768229 B CN106768229 B CN 106768229B CN 201611254887 A CN201611254887 A CN 201611254887A CN 106768229 B CN106768229 B CN 106768229B
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/017—Detecting movement of traffic to be counted or controlled identifying vehicles
-
- 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G23/00—Auxiliary devices for weighing apparatus
- G01G23/005—Means for preventing overload
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/042—Detecting movement of traffic to be counted or controlled using inductive or magnetic detectors
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- General Physics & Mathematics (AREA)
- Geophysics And Detection Of Objects (AREA)
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Abstract
The present invention relates to the working methods that one kind can carry out the weighing system of type of vehicle differentiation, comprising: first carries out low-pass digital filter using Caesar's window low-pass filter to digital weighing-up wave, cutoff frequency is set as 10Hz；Then sliding mean filter is carried out to the digital weighing signal within the scope of the 0-10HZ after low-pass filtering, wherein, the minimum frequency and maximum amplitude of setting sliding mean filter, i.e. to being located in the minimum frequency and carrying out sliding mean filter no more than the digital weighing signal of maximum amplitude, to obtain weight data.It is of the invention by Caesar's window low-pass filter to sliding mean filter is carried out again after the filtering of digital weighing-up wave, overcome the vehicle that weighs and do not stop working, weighting error caused by engine is shaken.
Description
Technical field
The present invention relates to a kind of weighing system and working method more particularly to a kind of weighing systems differentiated suitable for type of vehicle
System and working method.
Background technique
Overload of vehicle is the major reason for causing highway to accelerate damage, and the whole of traditional weighing system mostly automobile claims
Weight, is unable to judge type of vehicle, and further judge whether the vehicle overloads.And for production unit, send
Title can be crossed when lorry zero load, after title, the goods weight that can be weighed up when waiting fully loaded, but whether vehicle overloads,
Existing weighing system is difficult to judge.
Chinese patent literature CN 103196530A discloses a kind of vehicle dynamic weighing system and its weighing method, wherein
Tire identification signal is acquired by tire recognizer to judge type of vehicle.The technical solution is due to identifying measurement by tire
Type, the technical solution is for lorry, and front and back tire is it is possible that inconsistent situation, so will cause tire identification
Device can not accurately differentiate type of vehicle, cause measurement error.
Summary of the invention
Head technical problems to be solved of the invention are to provide a kind of weighing system differentiated suitable for type of vehicle and work side
Method, weighing system technical problems to be solved first examine the type of the vehicle while weighing to vehicle
It surveys, can further judge whether the vehicle overloads, and be particularly suitable for being lined up the case where loading is weighed in more lorries, overcome
The technical issues of vehicle sequencing must be taken into consideration when crossing title in conventional weighing system, improves weighing efficiency.
In order to solve the above-mentioned technical problems, the present invention provides a kind of working methods of weighing system, comprising:
A, low-pass digital filter is carried out using Caesar's window low-pass filter to digital weighing-up wave, cutoff frequency is set as
10Hz；
B, sliding mean filter is carried out to the digital weighing signal within the scope of the 0-10HZ after low-pass filtering, wherein setting
The minimum frequency and maximum amplitude of mean filter are slided, i.e., to the number title being located in the minimum frequency and no more than maximum amplitude
Weight signal carries out sliding mean filter, to obtain weight data.
Further, type of vehicle is identified in order to realize, judges whether the vehicles drive cargo overloads, the weighing
System includes:
Type of vehicle detection device, the type of vehicle detection device are installed on the center of the weighing area of weighting platform；
The type of vehicle detection device includes:
Magnetic bias generating device, for generating the stable bias magnetic field of a spatial distribution, and the magnetic line of force of the bias magnetic field
The circuit direction of circling of composition is consistent with the direction of vehicle driving to be weighed to the weighing area, and covers the weighing area
Upper space；
Magnetic perception component is placed in the bias magnetic field, and is received vehicle to be weighed and produced into the bias magnetic field
Raw magnetic disturbance signal；
Storage unit is stored with type of vehicle feature database, which includes type of vehicle, the specified load of vehicle
Weight；
The method for obtaining the type of vehicle feature database are as follows: when all types of vehicles respectively enter the bias magnetic field, institute
It states magnetic perception component and receives the magnetic disturbance signal that the vehicle generates；Each magnetic disturbance signal is converted into the type with the vehicle
The amplitude of corresponding impulse waveform, the impulse waveform is determined by the amplitude average value of the magnetic disturbance signal；It is thus obtained
Each impulse waveform corresponding with the type of the vehicle constitutes the type of vehicle feature database；
Processor module is connected with the storage unit, is suitable for handling the received magnetic disturbance signal of magnetic perception component；
That is, the magnetic disturbance signal is converted to pulse signal corresponding with the weighing vehicle, impulse amplitude by the processor module
For the amplitude average value of the magnetic disturbance signal；
The processor module compares the pulse signal and the impulse amplitude in the type of vehicle feature database, i.e.,
It can get the type of the weighing vehicle；
The working method of the weighing system further include:
1. the weighing system is to current vehicle after unloaded all types of freight trucks drive into the weighing area one by one
It carries out weighing and obtains unloaded car weight data, while obtaining the type of current vehicle by the type of vehicle detection device, that is, institute
The type that processor module judges current vehicle according to the magnetic disturbance signal that the magnetic perception component obtains is stated, and current according to this
The type of vehicle obtains the payload ratings of the vehicle, and the type of the current vehicle, payload ratings, unloaded car weight data hair
It send in the memory module in the weighing cell into the weighing system；
2. the weighing system is again to current after driving into the weighing area one by one again after each freight truck loads
Vehicle carries out weighing and obtains fully loaded car weight data, while being obtained by the type of vehicle detection device according to the magnetic perception component
Magnetic disturbance signal judge the type of current vehicle again, the weighing system calls the logical of storage according to the type of current vehicle
It crosses step and 1. stores the payload ratings of the vehicle in a storage module, unloaded car weight data；By unloaded car weight data with work as
Preceding fully loaded car weight data are compared, and obtain goods weight, and judge that current freight truck is by the payload ratings data
No overload.
Further, in order to send stablize, the bias magnetic field of wide coverage, the magnetic bias generating device includes: permanent magnetism
Body, the first, second magnetizer, the two poles of the earth of the permanent magnet are in contact with one end of the first, second magnetizer respectively, and it is described forever
Magnet and the first, second magnetizer constitute L-shaped；The other end of first or second magnetizer is adjacent with the magnetic perception component
Setting, and the permanent magnet, the first and second magnetizer, magnetic perception component constitute a concave shape；Wherein, the bias magnetic field is suitable for
It is issued from the end of first magnetizer, and passes through the magnetic perception component along the length direction of the second magnetizer, that is, constituted
The bypass loop of the magnetic line of force；There are the air for being suitable for adjusting magnetic field strength between the magnetic perception component and the second magnetizer
Magnetic gap.
Further, magnetic disturbance signal is received in order to realize from all directions, the magnetic perception component includes: three pairs in horn-like
The magnetic for being suitable for converging magnetic signal converge body, the horn mouth of three pairs of magnetic convergence bodies is arranged outwardly and is respectively at a square
Six end faces on, constitute a cavity between the inner end of three pairs of magnetic convergence body, be equipped in the cavity and the processor die
The connected three-D magnetic field sensor of block；Set the X-axis of three-D magnetic field sensor, Y-axis, Z axis respectively with first, second, third pair
The central axis that magnetic converges body is consistent；
The type of vehicle detection device is suitable for entering the bias magnetic field, the three-D magnetic field sensor when weighing vehicle
X-axis be adapted to detect for it is described weighing vehicle the magnetic perception component front or rear direction generate magnetic disturbance signal；Described three
The Y-axis of dimension magnetic field sensor is adapted to detect for the magnetic disturbance that the weighing vehicle generates in the left or right direction of the magnetic perception component
Signal；The Z axis of the three-D magnetic field sensor is adapted to detect for what the weighing vehicle was generated in the top of the magnetic perception component
Magnetic disturbance signal.
In order to solve the above-mentioned technical problem, the present invention also provides a kind of weighing system differentiated suitable for type of vehicle, packets
It includes:
Type of vehicle detection device, the type of vehicle detection device are installed on the center of the weighing area of weighting platform；
The type of vehicle detection device includes:
Magnetic bias generating device, for generating the stable bias magnetic field of a spatial distribution, and the magnetic line of force of the bias magnetic field
The circuit direction of circling of composition is consistent with the direction of vehicle driving to be weighed to the weighing area, and covers the weighing area
Upper space；
Magnetic perception component is placed in the bias magnetic field, and is received vehicle to be weighed and produced into the bias magnetic field
Raw magnetic disturbance signal；
Storage unit is stored with type of vehicle feature database, which includes type of vehicle, the specified load of vehicle
Weight；
The method for obtaining the type of vehicle feature database are as follows: when all types of vehicles respectively enter the bias magnetic field, institute
It states magnetic perception component and receives the magnetic disturbance signal that the vehicle generates；Each magnetic disturbance signal is converted into the type with the vehicle
The amplitude of corresponding impulse waveform, the impulse waveform is determined by the amplitude average value of the magnetic disturbance signal；It is thus obtained
Each impulse waveform corresponding with the type of the vehicle constitutes the type of vehicle feature database；
Processor module is connected with the storage unit, is suitable for handling the received magnetic disturbance signal of magnetic perception component；
That is, the magnetic disturbance signal is converted to pulse signal corresponding with the weighing vehicle, impulse amplitude by the processor module
For the amplitude average value of the magnetic disturbance signal；
The processor module compares the pulse signal and the impulse amplitude in the type of vehicle feature database, i.e.,
It can get the type of the weighing vehicle.
Further, in order to send stablize, the bias magnetic field of wide coverage, the magnetic bias generating device includes: permanent magnetism
Body, the first, second magnetizer, the two poles of the earth of the permanent magnet are in contact with one end of the first, second magnetizer respectively, and it is described forever
Magnet and the first, second magnetizer constitute L-shaped；
The other end of first or second magnetizer is disposed adjacent with the magnetic perception component, and the permanent magnet, and first and second
Magnetizer, magnetic perception component constitute a concave shape；
Wherein, the bias magnetic field is suitable for issuing from the end of first magnetizer, and along the length of the second magnetizer
Direction passes through the magnetic perception component, that is, constitutes the bypass loop of the magnetic line of force；
There are the air magnetic gaps for being suitable for adjusting magnetic field strength between the magnetic perception component and the second magnetizer.
Further, magnetic disturbance signal is received in order to realize from all directions, the magnetic perception component includes: three pairs in horn-like
The magnetic for being suitable for converging magnetic signal converge body, the horn mouth of three pairs of magnetic convergence bodies is arranged outwardly and is respectively at a square
Six end faces on, constitute a cavity between the inner end of three pairs of magnetic convergence body, be equipped in the cavity and the processor die
The connected three-D magnetic field sensor of block；Set the X-axis of three-D magnetic field sensor, Y-axis, Z axis respectively with first, second, third pair
The central axis that magnetic converges body is consistent；
The type of vehicle detection device is suitable for entering the bias magnetic field, the three-D magnetic field sensor when weighing vehicle
X-axis be adapted to detect for it is described weighing vehicle the magnetic perception component front or rear direction generate magnetic disturbance signal；Described three
The Y-axis of dimension magnetic field sensor is adapted to detect for the magnetic disturbance that the weighing vehicle generates in the left or right direction of the magnetic perception component
Signal；The Z axis of the three-D magnetic field sensor is adapted to detect for what the weighing vehicle was generated in the top of the magnetic perception component
Magnetic disturbance signal.
Compared with prior art, the present invention has the advantage that (1) is of the invention to pass through Caesar's window low-pass filter logarithm
Sliding mean filter is carried out again after the filtering of word weighing-up wave, is overcome the vehicle that weighs and is not stopped working, weighing caused by engine shake
Error；(2) detection of type of vehicle is realized by type of vehicle detection device, is obtained the lifting capacity for the vehicle that weighs, is avoided
Overload of vehicle, can be widely applied to the places such as high speed charge station, goods yard；(3) group is known by magnetic bias generating device and magnetic strength
There is the cooperating of part vehicle disturbed magnetic field to stablize, and the feature that the magnetic field signal is strong；(4) it by vehicle type recognition, keeps away
Exempted from the weighing system of the prior art when more lorries are lined up loadings and weigh, it is necessary to consider when lorry zero load weigh it is suitable
Sequence, or only a lorry weighs from zero load, then the technical issues of weigh to after loading, by vehicle type recognition, to zero load
The vehicle that weighs is confirmed, after vehicle loading, carries out vehicle identification again, especially suitable without considering the sequence of weighing of vehicle
It freights in various types of vehicle, improves weighing efficiency.
Detailed description of the invention
In order to make the content of the present invention more clearly understood, below according to specific embodiment and in conjunction with attached drawing,
The present invention is described in further detail, wherein
The frequency response curve of Caesar's window low-pass filter Fig. 1 of the invention；
The weighing-up wave waveform that Fig. 2 is handled without the working method of weighing system of the invention；
The weighing-up wave waveform that Fig. 3 is handled through the working method of weighing system of the invention；
The position view of type of vehicle detection device in weighing system Fig. 4 of the invention；
The schematic perspective view of magnetic bias generating device and magnetic perception component Fig. 5 of the invention；
The structural schematic diagram of magnetic bias generating device and magnetic perception component Fig. 6 of the invention；
A kind of circuit structure block diagram of embodiment of type of vehicle detection device Fig. 7 of the invention；
The circuit structure block diagram of the another embodiment of type of vehicle detection device Fig. 8 of the invention；
The schematic perspective view of magnetic convergence body Fig. 9 of the invention；
The structural schematic diagram of magnetic perception component Figure 10 of the invention
Wherein, permanent magnet 1, the first magnetizer 2, the second magnetizer 3, magnetic perception component 4, bias magnetic field 5, air magnetic gap 6,
Magnetic converges body 7, cavity 8, weighting platform 9, weighing area 9-1, type of vehicle detection device 10.
Specific embodiment
The following describes the present invention in detail with reference to the accompanying drawings and embodiments:
Embodiment 1
A kind of working method of weighing system, comprising:
A, low-pass digital filter is carried out using Caesar's window low-pass filter to digital weighing-up wave, cutoff frequency is set as
10Hz；
B, sliding mean filter is carried out to the digital weighing signal within the scope of the 0-10HZ after low-pass filtering, wherein setting
The minimum frequency and maximum amplitude of mean filter are slided, i.e., to the number title being located in the minimum frequency and no more than maximum amplitude
Weight signal carries out sliding mean filter, to obtain weight data.
Wherein, the minimum frequency takes 0.5HZ(2 seconds), amplitude peak is the two of the weight scale division value of weighing system setting
Times.
Caesar's window low-pass filter, setting sample frequency are 50Hz, and cutoff frequency 10Hz, order is 16 ranks, such as
Shown in Fig. 1, be as can be seen from Figure 2 lower than 10hz, which does not wane cut signal substantially, be greater than 10hz decay it is especially big,
20hz decays to -60db later.
Fig. 2 and Fig. 3 comparison, it can be found that the actual test weighing number handled without the working method Jing Guo the invention
According to waveform, there is fluctuation in entire weighing process.It is just eliminated by the vibration of working method latter half of the invention
Fall.Therefore provide measurement accuracy.
See that Fig. 4, the weighing system include:
Type of vehicle detection device 10, the weighing area 9-1(which is installed on weighting platform 9 are shown in Fig. 4
Middle dotted line indicates region) center；
See Fig. 5, Fig. 6 and Fig. 7, the type of vehicle detection device 10 includes:
Magnetic bias generating device, for generating the stable bias magnetic field 5 of a spatial distribution, and the magnetic force of the bias magnetic field 5
Circuit direction of circling (A arrow indicates direction in Fig. 4) and the vehicle driving to be weighed to the side of the weighing area 9-1 that line is constituted
Unanimously to (in Fig. 4 B arrow indicate direction), and the upper space of the weighing area 9-1 is covered, it, can be with if magnetic field strength is big
Accomplish to be completely covered, if magnetic field strength is small, although cannot be completely covered, can also reach testing requirements.Specifically it is detailed in magnetic biasing
Set the structure and working principle of generating device.
Magnetic perception component 4 is placed in the bias magnetic field 5, and is received vehicle to be weighed and entered 5 institute of bias magnetic field
The magnetic disturbance signal of generation.
Storage unit is stored with type of vehicle feature database, which includes type of vehicle, the specified load of vehicle
Weight.
The type of vehicle feature database is priori knowledge, needs to obtain before using the type of vehicle detection device 10
?.Wherein, the method for the type of vehicle feature database is obtained are as follows: when all types of vehicles drive into the bias magnetic field 5 respectively, institute
It states magnetic perception component 4 and receives the magnetic disturbance signal that the vehicle generates；Each magnetic disturbance signal is converted into the class with the vehicle
The amplitude of the corresponding impulse waveform of type, the impulse waveform is determined by the amplitude average value of the magnetic disturbance signal；Thus to obtain
Each impulse waveform corresponding with the type of the vehicle, that is, constitute the type of vehicle feature database；
Processor module is connected with the storage unit, is suitable for the processing magnetic perception component 4 received magnetic disturbance letter
Number；That is, the magnetic disturbance signal is converted to pulse signal corresponding with the weighing vehicle, pulse width by the processor module
Degree is the amplitude average value of the magnetic disturbance signal；The processor module is by the pulse signal and the type of vehicle feature database
In impulse amplitude compare, can be obtained the type of the weighing vehicle.
The working method of the weighing system further include:
1. the weighing system is to current after unloaded all types of freight trucks drive into the weighing area 9-1 one by one
Vehicle carries out weighing and obtains unloaded car weight data, while the class of current vehicle is obtained by the type of vehicle detection device 10
Type, that is, the processor module judges the type of current vehicle according to the magnetic disturbance signal that the magnetic perception component 4 obtains, and
The payload ratings of the vehicle are obtained according to the type of the current vehicle, and the type of the current vehicle, payload ratings, zero load
Car weight data are sent in the memory module in the weighing cell in the weighing system；
2. the weighing system is right again after driving into the weighing area 9-1 one by one again after each freight truck loads
Current vehicle carries out weighing and obtains fully loaded car weight data, while knowing group according to the magnetic strength by the type of vehicle detection device 10
The magnetic disturbance signal that part 4 obtains judges the type of current vehicle again, and the weighing system is called according to the type of current vehicle
The payload ratings that the vehicle in a storage module is 1. stored by step of storage, unloaded car weight data；Pass through unloaded car weight
Data are compared with current fully loaded car weight data, obtain goods weight, and work as front bearing by payload ratings data judgement
Whether lorry overloads.
Wherein, the magnetic bias generating device can be constituted with the permanent magnet of different shape, different materials, different characteristics,
But its essence is that the stable bias magnetic field 5 of a spatial distribution is generated on weighting platform weighing area；Magnetic perception component 4, Ke Yijie
It receives from the irradiated next magnetic field of all directions, obtains a convergence magnetic field；Magnetic disturbance signal enters magnetic field for a ferromagnetic material
In, generated complementary field after being magnetized；The magnetic induction intensity of the complementary field is according to the matter of the ferromagnetic material
Amount, structure it is different and different, that is, when automobile enter the bias magnetic field 5 when, since the main material of vehicle is steel, vehicle
Magnetic disturbance will be generated in the bias magnetic field；The knot of the components such as length, width, the number of axle, engine and the gearbox-type of vehicle
The difference of structure and layout, so as to be formed by magnetic disturbance signal amplitude, length, the high signal of width of Wave crest and wave trough special for different vehicle
It levies different.Under determining bias magnetic field 5, the magnetic signal feature of same type vehicle is almost the same, this is this vehicle class
The physical basis that type detection device is detected.
In the type of vehicle detection device, it is particularly critical to establish type of vehicle feature database.So can also be using such as
Lower two methods establish type of vehicle feature database, and the work for carrying out the detection of type of vehicle and testing the speed.
Method one, the method for obtaining the type of vehicle feature database can also receive title by magnetic perception component 4
Generated magnetic disturbance signal when loaded vehicle is by bias magnetic field 5, and with after processor resume module, extract magnetic disturbance signal pair
Answer in time domain, the feature of frequency domain to determine respective type vehicle.
When carrying out vehicle detection, signal is generated when can also extract weighing vehicle by above magnetic bias generating device
Time domain, the feature of frequency domain, and obtain the time domain of signal, frequency domain character in the type of vehicle feature database with this method and compare,
To obtain the type of weighing vehicle.
Method two, the accuracy in order to further increase type of vehicle feature database, the method for establishing type of vehicle feature database
Include:
When all types of vehicles respectively enter the bias magnetic field 5, the magnetic perception component 4 receives what the vehicle generated
Magnetic disturbance signal；After the digitlization of each magnetic disturbance signal, characteristic relevant to these vehicles, including magnetic perturbation are therefrom extracted
The impulse amplitude average characteristics of dynamic signal, extremal features and spatial-temporal distribution characteristic, it is categorized sum up after in the form of eigenmatrix
It is stored in storage unit, forms the type of vehicle feature database, that is, the eigenmatrix for obtaining the magnetic disturbance sample is constituted
Type of vehicle feature database；
If being saved in the form of eigenmatrix in the type of vehicle feature database, the processor module is by the magnetic
The eigenmatrix of disturbance sample is compared with the eigenmatrix in the type of vehicle feature database, can be obtained the weighing vehicle
Type.
See Fig. 6, in order to improve the directionality, stability, intensity of bias magnetic field 5, the magnetic bias generating device includes: forever
The two poles of the earth of magnet 1, the first, second magnetizer, the permanent magnet 1 are in contact with one end of the first, second magnetizer respectively, and institute
It states permanent magnet 1 and the first, second magnetizer constitutes L-shaped；The other end of first or second magnetizer and the magnetic perception component
4 are disposed adjacent, and the permanent magnet 1, the first, second magnetizer, and magnetic perception component 4 constitutes a concave shape；Wherein, the biasing
Magnetic field 5 is suitable for issuing from the end of first magnetizer 2, and passes through the magnetic strength along the length direction of the second magnetizer 3 and know
Component 4 constitutes the bypass loop of the magnetic line of force；There are be suitable for adjusting between the magnetic perception component 4 and the second magnetizer 3
The air magnetic gap 6 of magnetic field strength.
Wherein, magnetic bias magnetic field 5 is made of Nd-Fe-B permanent magnet 1 and magnetic flux guide body (magnetizer), magnetic flux guide body with
High permeability materials production, saturation flux B with higherSAnd lower magnetic resistance σ, one point can be generated around sensing point
The stable non-uniform stable magnetic field of cloth.Since magnetic induction of the magnetic field in effective search coverage is much higher than earth's magnetic field, the magnetic
Field characteristic is unrelated with sensing point latitude and direction of traffic, is difficult to obtain by latitude and azimuthal influence to get rid of earth magnetism detection method
The shortcomings that obtaining unified detecting parameter, and primary condition is provided for the detection based on signal structure characteristic and frequency characteristic.It should
Distribution of Magnetic Field and field strength can according to detection it needs to be determined that, to obtain optimal detection effect.Adjust the air magnetic gap 6
Size is to adjust magnetic field strength.
See Fig. 6, Fig. 9, Figure 10, the magnetic perception component 4 includes: three pairs and converges in the horn-like magnetic for being suitable for converging magnetic signal
The horn mouth of aggressiveness 7, three pairs of magnetic convergence bodies 7 is arranged and is respectively at outwardly on six end faces of a square, and this three pairs
A cavity 8 is constituted between the inner end of magnetic convergence body 7, the three-dimensional magnetic field being connected with the processor module is equipped in the cavity 8
Sensor；The X-axis, Y-axis, Z axis for setting three-D magnetic field sensor converge the central axis of body 7 with first, second, third pair of magnetic respectively
Line is consistent；Wherein, magnetic convergence body 7 can also be with trapezoidal important actor shape.
The type of vehicle detection device 10 is adapted to be mounted to the center of weighing area 9-1, when vehicle to be weighed is sailed
After entering the bias magnetic field 5, then the X-axis of the three-D magnetic field sensor is adapted to detect for the vehicle to be weighed and knows in the magnetic strength
The magnetic disturbance signal that the front or rear direction of component 4 generates；The Y-axis of the three-D magnetic field sensor is adapted to detect for the weighing vehicle
In the magnetic disturbance signal that the left or right direction of the magnetic perception component 4 generates；The Z axis of the three-D magnetic field sensor is adapted to detect for
The magnetic disturbance signal that the vehicle to be weighed is generated in the top of the magnetic perception component 4；That is, 4 front and back of magnetic perception component
Direction is that first pair of magnetic converges body, and left and right directions is that second pair of magnetic converges body, and up and down direction converges body to magnetic for third, while
It can according to need, the X, Y, Z axis for adjusting the three-D magnetic field sensor converges the corresponding of body with first, second, third pair of magnetic
Relationship, detection method are the same.
Realize above-mentioned type of vehicle detection when, the magnetic disturbance signal be X-axis, Y-axis, three directions of Z axis magnetic disturbance
The summation (summarizing) of signal.
See Fig. 8, for the stringent environmental requirements of weighing field monitoring, signal condition part uses low drifting low noise amplifier
Design realizes temperature-compensating in conjunction with field temperature sensor；The type of vehicle detection device further include: with the processor die
The temperature sensor suitable for acquiring environment temperature that block is connected, the processor module are further adapted for carrying out temperature to magnetic disturbance signal
Degree compensation；The conditioning circuit for the signal amplitude that the magnetic perception component 4 is suitable for adjusting magnetic disturbance signal with one is connected, conditioning electricity
Road is connected with the processor module.
Processor module in the embodiment can be the processor die that AD conversion is set in single-chip microcontroller, embedded, DSP etc.
Block can also be realized using the technical solution of external AD conversion module.
Embodiment 2
See Fig. 4-7, a kind of weighing system for being suitable for type of vehicle and differentiating of the working method for the weighing system should
Weighing system includes type of vehicle detection device 10, which is installed on the weighing area 9-1 of weighting platform 9
The center of (indicating region see dotted line in Fig. 4)；
The type of vehicle detection device 10 includes:
Magnetic bias generating device, for generating the stable bias magnetic field 5 of a spatial distribution, and the magnetic force of the bias magnetic field 5
Circuit direction of circling (A arrow indicates direction in Fig. 4) and the weighing vehicle driving to the direction of the weighing area 9-1 that line is constituted
(B arrow indicates direction in Fig. 4) unanimously, and covers the upper space of the weighing area 9-1, if magnetic field strength is big, can do
To being completely covered, if magnetic field strength is small, although cannot be completely covered, it can also reach testing requirements.Specifically it is detailed in magnetic bias
The structure and working principle of generating device.
Magnetic perception component 4 is placed in the bias magnetic field 5, and is received weighing vehicle and produced into the bias magnetic field 5
Raw magnetic disturbance signal.
Storage unit is stored with type of vehicle feature database, which includes type of vehicle, the specified load of vehicle
Weight；
The method for obtaining the type of vehicle feature database are as follows: when all types of vehicles drive into the bias magnetic field 5 respectively, institute
It states magnetic perception component 4 and receives the magnetic disturbance signal that the vehicle generates；Each magnetic disturbance signal is converted into the class with the vehicle
The amplitude of the corresponding impulse waveform of type, the impulse waveform is determined by the amplitude average value of the magnetic disturbance signal；Thus to obtain
Each impulse waveform corresponding with the type of the vehicle, that is, constitute the type of vehicle feature database；
Processor module is connected with the storage unit, is suitable for the processing magnetic perception component 4 received magnetic disturbance letter
Number；That is, the magnetic disturbance signal is converted to pulse signal corresponding with the weighing vehicle, pulse width by the processor module
Degree is the amplitude average value of the magnetic disturbance signal；The processor module is by the pulse signal and the type of vehicle feature database
In impulse amplitude compare, can be obtained the type of the weighing vehicle.
It establishes the method for type of vehicle feature database and improves that establish the method for type of vehicle feature database identical in embodiment 1.
That is, the method for establishing type of vehicle feature database includes: when all types of vehicles respectively enter the bias magnetic field 5
When, the magnetic perception component 4 receives the magnetic disturbance signal that the vehicle generates；After the digitlization of each magnetic disturbance signal, Cong Zhongti
Take out characteristic relevant to these vehicles, the impulse amplitude average characteristics including magnetic disturbance signal, extremal features and space-time
Distribution characteristics, it is categorized sum up after be stored in storage unit in the form of eigenmatrix, form the type of vehicle feature
Library, that is, obtain the type of vehicle feature database that the eigenmatrix of the magnetic disturbance sample is constituted.
Wherein, the magnetic bias generating device includes: permanent magnet 1, the first, second magnetizer, the two poles of the earth of the permanent magnet 1
It is in contact respectively with one end of the first and second magnetizer, and the permanent magnet 1 and the first, second magnetizer constitute L-shaped；First
Or second the other end of magnetizer be disposed adjacent with the magnetic perception component 4, and the permanent magnet 1, the first, second magnetizer,
Magnetic perception component 4 constitutes a concave shape；Wherein, the bias magnetic field 5 is suitable for issuing from the end of first magnetizer 2, and
Length direction along the second magnetizer 3 passes through the magnetic perception component 4, that is, constitutes the bypass loop of the magnetic line of force；The magnetic
There are the air magnetic gaps 6 for being suitable for adjusting magnetic field strength between perception component 4 and the second magnetizer 3；The magnetic perception component 4 is wrapped
Include: three pairs are arranged outwardly in the horn-like magnetic convergence body 7 for being suitable for converging magnetic signal, the horn mouth of three pairs of magnetic convergence bodies 7
And be respectively on six end faces of a square, a cavity 8 is constituted between the inner end of three pairs of magnetic convergence bodies 7, the cavity 8
It is interior equipped with the three-D magnetic field sensor being connected with the processor module；Set the X-axis, Y-axis, Z axis point of three-D magnetic field sensor
Central axis not corresponding with first, second, third pair of magnetic convergence body 7 is consistent.
The type of vehicle detection device 10 is adapted to be mounted to the center of the weighing area 9-1, when vehicle to be weighed
After driving into the bias magnetic field 5, then the X-axis of the three-D magnetic field sensor is adapted to detect for the vehicle to be weighed in the magnetic
The magnetic disturbance signal that the front or rear direction of perception component 4 generates；The Y-axis of the three-D magnetic field sensor is adapted to detect for the weighing
The magnetic disturbance signal that vehicle generates in the left or right direction of the magnetic perception component 4；The Z axis of the three-D magnetic field sensor is suitable for
Detect the magnetic disturbance signal that the weighing vehicle is generated in the top of the magnetic perception component 4.
Obviously, the above embodiment is merely an example for clearly illustrating the present invention, and is not to of the invention
The restriction of embodiment.For those of ordinary skill in the art, it can also be made on the basis of the above description
Its various forms of variation or variation.There is no necessity and possibility to exhaust all the enbodiments.And these belong to this hair
The obvious changes or variations that bright spirit is extended out are still in the protection scope of this invention.
Claims (1)
1. a kind of working method of weighing system characterized by comprising
A, low-pass digital filter is carried out using Caesar's window low-pass filter to digital weighing-up wave, cutoff frequency is set as 10Hz；
B, sliding mean filter is carried out to the digital weighing signal within the scope of the 0-10HZ after low-pass filtering, wherein setting sliding
The minimum frequency and maximum amplitude of mean filter are believed the digital weighing being located in the minimum frequency and no more than maximum amplitude
Number sliding mean filter is carried out, to obtain weight data；
The weighing system includes type of vehicle detection device, which is installed on the weighing area of weighting platform
Center；
The type of vehicle detection device includes:
Magnetic bias generating device, for generating the stable bias magnetic field of a spatial distribution, and the magnetic line of force of the bias magnetic field is constituted
Circuit direction of circling it is consistent with the direction of vehicle driving to be weighed to the weighing area, and cover the upper of the weighing area
Portion space；
Magnetic perception component is placed in the bias magnetic field, and is received vehicle to be weighed and entered caused by the bias magnetic field
Magnetic disturbance signal；
Storage unit is stored with type of vehicle feature database, which includes type of vehicle, vehicle payload ratings；
The method for obtaining the type of vehicle feature database are as follows: when all types of vehicles respectively enter the bias magnetic field, the magnetic
Perception component receives the magnetic disturbance signal that the vehicle generates；Each magnetic disturbance signal is converted into opposite with the type of the vehicle
The amplitude of the impulse waveform answered, the impulse waveform is determined by the amplitude average value of the magnetic disturbance signal；Thus obtained and institute
The corresponding each impulse waveform of type for stating vehicle, that is, constitute the type of vehicle feature database；
Processor module is connected with the storage unit, is suitable for handling the received magnetic disturbance signal of magnetic perception component；That is, institute
It states processor module and the magnetic disturbance signal is converted to pulse signal corresponding with the weighing vehicle, impulse amplitude is the magnetic
The amplitude average value of disturbing signal；
The processor module compares the pulse signal and the impulse amplitude in the type of vehicle feature database, can obtain
Obtain the type of the weighing vehicle；
The working method of the weighing system further include:
1. the weighing system carries out current vehicle after unloaded all types of freight trucks drive into the weighing area one by one
Weighing obtains unloaded car weight data, while the type of current vehicle is obtained by the type of vehicle detection device, that is, the place
Reason device module judges the type of current vehicle according to the magnetic disturbance signal that the magnetic perception component obtains, and according to the current vehicle
Type obtain the payload ratings of the vehicle, and the type of the current vehicle, payload ratings, unloaded car weight data are sent to
In the memory module in weighing cell in the weighing system；
2. the weighing system is again to current vehicle after driving into the weighing area one by one again after each freight truck loads
It carries out weighing and obtains fully loaded car weight data, while the magnetic obtained by the type of vehicle detection device according to the magnetic perception component
Disturbing signal judges the type of current vehicle again, and the weighing system calls what is stored to pass through step according to the type of current vehicle
Suddenly payload ratings, the zero load car weight data of the vehicle in a storage module are 1. stored；It is by unloaded car weight data and currently full
Carrier vehicle tuple obtains goods weight, and judge whether current freight truck surpasses by the payload ratings data according to being compared
It carries；
The magnetic bias generating device includes: permanent magnet, the first, second magnetizer, the two poles of the earth of the permanent magnet respectively with first,
One end of second magnetizer is in contact, and the permanent magnet and the first, second magnetizer constitute L-shaped；
The other end of first or second magnetizer is disposed adjacent with the magnetic perception component, and the permanent magnet, the first and second magnetic conduction
Body, magnetic perception component constitute a concave shape；
Wherein, the bias magnetic field is suitable for issuing from the end of first magnetizer, and along the length direction of the second magnetizer
Across the magnetic perception component, that is, constitute the bypass loop of the magnetic line of force；
There are the air magnetic gaps for being suitable for adjusting magnetic field strength between the magnetic perception component and the second magnetizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611254887.2A CN106768229B8 (en) | 2013-08-22 | 2013-08-22 | It can carry out the working method of the weighing system of type of vehicle differentiation |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611254887.2A CN106768229B8 (en) | 2013-08-22 | 2013-08-22 | It can carry out the working method of the weighing system of type of vehicle differentiation |
| CN201310369436.3A CN104422501B (en) | 2013-08-22 | 2013-08-22 | A kind of weighing system and method for work for being suitable to type of vehicle differentiation |
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| CN201310369436.3A Division CN104422501B (en) | 2013-08-22 | 2013-08-22 | A kind of weighing system and method for work for being suitable to type of vehicle differentiation |
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| CN106768229A CN106768229A (en) | 2017-05-31 |
| CN106768229B true CN106768229B (en) | 2019-03-12 |
| CN106768229B8 CN106768229B8 (en) | 2019-04-19 |
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| CN201310369436.3A Active CN104422501B (en) | 2013-08-22 | 2013-08-22 | A kind of weighing system and method for work for being suitable to type of vehicle differentiation |
| CN201611257339.5A Active CN106600970B (en) | 2013-08-22 | 2013-08-22 | Suitable for the weighing system for differentiating type of vehicle, judging whether overload |
| CN201611255853.5A Expired - Fee Related CN106482816B (en) | 2013-08-22 | 2013-08-22 | It can carry out the weighing system of type of vehicle differentiation |
| CN201611254887.2A Active CN106768229B8 (en) | 2013-08-22 | 2013-08-22 | It can carry out the working method of the weighing system of type of vehicle differentiation |
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| CN201310369436.3A Active CN104422501B (en) | 2013-08-22 | 2013-08-22 | A kind of weighing system and method for work for being suitable to type of vehicle differentiation |
| CN201611257339.5A Active CN106600970B (en) | 2013-08-22 | 2013-08-22 | Suitable for the weighing system for differentiating type of vehicle, judging whether overload |
| CN201611255853.5A Expired - Fee Related CN106482816B (en) | 2013-08-22 | 2013-08-22 | It can carry out the weighing system of type of vehicle differentiation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023083563A1 (en) * | 2021-11-11 | 2023-05-19 | Robert Bosch Gmbh | Device and method for detecting a vehicle, and charging station for an electric vehicle |
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|---|---|---|---|---|
| CN104422501B (en) * | 2013-08-22 | 2017-03-29 | 常州艾斯派尔电气科技有限公司 | A kind of weighing system and method for work for being suitable to type of vehicle differentiation |
| CN110992701A (en) * | 2019-11-08 | 2020-04-10 | 北京万集科技股份有限公司 | Vehicle overrun detection system |
| CN111627225B (en) * | 2020-07-30 | 2020-10-30 | 杭州智诚惠通科技有限公司 | Multi-dimensional judgment method for type of axle facing nuclear load monitoring in substation |
| CN112763039B (en) * | 2020-12-30 | 2023-07-18 | 北京万集科技股份有限公司 | Dynamic weighing device and weighing method thereof |
| CN112763038B (en) * | 2020-12-30 | 2023-07-18 | 北京万集科技股份有限公司 | Dynamic weighing device and weighing method thereof |
| CN114018381B (en) * | 2021-12-07 | 2024-02-27 | 南京智鹤电子科技有限公司 | Vehicle load monitoring system and monitoring method thereof |
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-
2013
- 2013-08-22 CN CN201310369436.3A patent/CN104422501B/en active Active
- 2013-08-22 CN CN201611257339.5A patent/CN106600970B/en active Active
- 2013-08-22 CN CN201611255853.5A patent/CN106482816B/en not_active Expired - Fee Related
- 2013-08-22 CN CN201611254887.2A patent/CN106768229B8/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2023083563A1 (en) * | 2021-11-11 | 2023-05-19 | Robert Bosch Gmbh | Device and method for detecting a vehicle, and charging station for an electric vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106600970B (en) | 2019-03-19 |
| CN106600970A (en) | 2017-04-26 |
| CN106768229A (en) | 2017-05-31 |
| CN106482816A (en) | 2017-03-08 |
| CN104422501B (en) | 2017-03-29 |
| CN106768229B8 (en) | 2019-04-19 |
| CN104422501A (en) | 2015-03-18 |
| CN106482816B (en) | 2019-02-12 |
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Effective date of registration: 20190219 Address after: 310000 Room 402, Fourth Floor, Building 408 Wensan Road, Xihu District, Hangzhou City, Zhejiang Province Applicant after: Zhejiang Dong Ding electronic Limited by Share Ltd. Address before: 213000 Jinling North Road, Xinbei District, Changzhou, Jiangsu, China, Hohai University Applicant before: Cai Liufeng |
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Address after: 310000 Three Floors of Building E, No. 3 Paradise Software Park, Xidoumen Road, Xihu District, Hangzhou City, Zhejiang Province Applicant after: Zhejiang Dong Ding electronic Limited by Share Ltd. Address before: 310000 Room 402, Fourth Floor, Building 408 Wensan Road, Xihu District, Hangzhou City, Zhejiang Province Applicant before: Zhejiang Dong Ding electronic Limited by Share Ltd. |
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Correction item: Address of the patentee Correct: 310000 Three Floors of Building E, No. 3 Paradise Software Park, Xidoumen Road, Xihu District, Hangzhou City, Zhejiang Province False: 310000 Room 402, Fourth Floor, Building 408 Wensan Road, Xihu District, Hangzhou City, Zhejiang Province Number: 11-01 Page: The title page Volume: 35 Correction item: Address of the patentee Correct: 310000 Three Floors of Building E, No. 3 Paradise Software Park, Xidoumen Road, Xihu District, Hangzhou City, Zhejiang Province False: 310000 Room 402, Fourth Floor, Building 408 Wensan Road, Xihu District, Hangzhou City, Zhejiang Province Number: 11-01 Volume: 35 |