CN2320991Y - High-precision axonometric electronic balance for vehicle - Google Patents
High-precision axonometric electronic balance for vehicle Download PDFInfo
- Publication number
- CN2320991Y CN2320991Y CN 96241324 CN96241324U CN2320991Y CN 2320991 Y CN2320991 Y CN 2320991Y CN 96241324 CN96241324 CN 96241324 CN 96241324 U CN96241324 U CN 96241324U CN 2320991 Y CN2320991 Y CN 2320991Y
- Authority
- CN
- China
- Prior art keywords
- weighing
- sensor
- metering
- utility
- model
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The utility model relates to a dynamic and static high-precision axonometric electronic balance for an automobile, which belongs to the field of electronic weighing and metering. The utility model is mainly composed of a transition part, a limitator device, a sensor connecting device and a weighing control instrument, wherein the limitator device is formed by connecting a spacing frame, a joint bearing, a hinge, a left spacing rod, a right spacing rod, a left rotary lock nut, a right rotary lock nut, a split pin and a spacing seat, the sensor connecting device is mainly formed by connecting a sensor, an upper pressing head, a lower pressing head, a steel ball, a fixing ring, a regulating nut and a locking nut, and the weighing control instrument is mainly composed of an amplifying filter circuit, an A/D converter, a CPV central processing unit, a display, operation keys, a printer, a memory, etc. Due to the adoption of an axonometric balance for the automobile, the utility model has the advantages of low cost and high metering precision.
Description
The utility model is the dual-purpose high precision axle of an a kind of sound attitude metering-type electronic vehicle weighing apparatus, belongs to the electronic-weighing metering field.
Usually the automobile Weighing mode that adopts in the world is at present: " car load static weighing and car load dynamic measurement " two kinds.The former precision is 0.1%, and the latter is 0.2%.The technology of these two kinds of products is ripe in China, uses widely.In addition, dynamically axle load meter and wheel weighing instrument etc. also adopt in some national traffic and highway management department as the low precision automobile weighing-appliance one (portable) of monitoring and investigate usefulness, but because its precision too low (percentage level) can not be used as standard metrology appliance.
Car load metering-type truck scale is because the cost height, and price is expensive, and general middle-size and small-size user is beyond affordability, and the market of China's maximum these medium and small users just.Simultaneously, car load formula truck scale profit for manufacturer is also few.Therefore, more domestic in recent years weighing apparatus factories set about from " static state " metering, develop the very low axle metering-type truck scale of some costs, and have obtained certain success.But static shaft metering-type truck scale must measure in the every contraposition of stopping, and it is very inconvenient to work together, and the user bigger for volume of goods flow can't satisfy the use needs especially.Therefore, can not stop " the dynamic shaft metering-type truck scale " of metering is exactly very needs and desirable product.
The topmost problem of dynamic shaft metering-type truck scale is the measuring accuracy problem.Because automobile each weight in the process of moving has transfer, adds the influence of factors such as vehicle level impulsive force and vibration to weight signal, measuring accuracy is difficult to improve, and is generally about 1%.
The purpose of this utility model is exactly at above-mentioned defective, provides a kind of sound attitude dual-purpose axle metering-type automobile weighing-appliance, and its dynamic shaft measuring accuracy can reach 0.2%---0.3%FS.Static accuracy 0.1%.
The purpose of this utility model is achieved in that it mainly is by transition portion, position limiter device, and sensor coupling arrangement and dynamic weighing instrument are formed, wherein transition portion mainly is by leading the way transition basis, transition adhesive tape, basic framework is adjusted backing plate and weighing platform and is formed.Fluting is installed the transition adhesive tape in the weighing platform both sides, makes between weighing platform and the basic framework seamless.After weighing platform face and framework integral installation are good, carry out the second casting basis again, guarantee weighing platform face and framework and transition basis on same surface level, thus the impact shock when having reduced weighing platform on the wheel.
The two ends of position limiter device be separately fixed on the weighing platform support and basic framework on.Position limiter device is by position-limited rack, oscillating bearing, and hinge, the left limit bar, left-handed locknut, setting nut, the dextrorotation locknut, the right limit bar, split pin and limit base connect and compose.
The sensor coupling arrangement is installed in below the weighing platform, it mainly be by: LOAD CELLS, seaming chuck, push-down head, the steel ball that resets, set collar, setting nut and set nut connect to form.The dynamic weighing instrument mainly is made up of for bridge source, amplifying circuit, analog wave filter circuit, A/D converter, digital filter, storer, cpu central processing unit, driver, display, printer etc.: power supply, benchmark.
The utility model groundwork principle:
Traditional car load metering-type dynamic vehicle weighing platform is very big, and its length is generally greater than institute's metering automobile more than 1.5 meters, and between 12～18 meters, weighing table is supported by one group of (4～6) LOAD CELLS.When automobile crosses table top, the automobile total weight is pressed in 1.5 meters operating range on the weighing platform, this section is the weight sample region, the weight signal of automobile is delivered to the dynamic weighing instrument by weighing platform and sensor, through becoming the gravimetric value demonstration after amplification, filtering, mould/number conversion and the smoothing processing and printing.Different with the car load formula, an axle metering-type truck scale is to adopt the mode of decomposing metering, respectively each weight of automobile is measured separately, calculates general assembly (TW) then automatically.Because under perfect condition, the general assembly (TW) of automobile equals the weight sum that its each wheel shaft transmits.Axle metering-type truck scale just is being based on that this theory develops.Its weighing platform is supported by four sensors, and lateral dimension is greater than the automobile width, and the direction of traffic size is to the greatest extent about 0.95 meter, can only make above single shaft is pressed in, and overall weight is less than 1 ton.Before and after road surface and level and contour above the weighing platform.When automobile crossed table top with 3～5 kilometers/hour speed, the weight of each just was measured out according to this, by special-purpose dynamic weighing instrument sampled data was handled then, and was calculated the general assembly (TW) (see figure 1) automatically and send to show and print.
Oscillating bearing all is equipped with in each hinged place of the two-way adjustable limiting device of hinge type (as shown in Figure 2), and is flexible in the vertical direction activity.Two erecting frames are separately fixed on weighing platform support and the basic framework, and the centre is an adjusting screw(rod).This stop is the power of constrained horizontal direction effectively, but the power of vertical direction is not had any constraint, does not therefore influence the transmission of gravity.In addition, adopt " articulated type double-spherical floating post stop " effect also very desirable.
Second measure is to have designed a cover sphere at sensor stress point place from resetting mechanism's (as shown in Figure 3).Upper and lower pressure head is the ball bowl-type, and the centre contains a steel ball.Seaming chuck has threaded adjusting and locking mechanism with being connected of sensor, so that regulate the stressed of each sensor, makes its unanimity.This structure can make the stress point place horizontal direction of sensor that certain degree of freedom is arranged, so horizontal impact power can not affact on the sensor, and sensor can only receive the power (being gravity) of vertical direction.Simultaneously the sphere of upper and lower pressure head makes steel ball can be returned to lowest point under action of gravity, so it has the reduction with good ability, has guaranteed that the stress point of sensor is constant, and this accepts exactly and transmit gravitational cue sensor is crucial.
For reducing and eliminate the influence of mechanical vibration, reduce the vibration except in Machine Design, adopting methods such as transition offset plate, emphasis also will be taked following measure:
Can know that from the waveform that experiment is collected the interference that various vibrations reflect has high frequency, intermediate frequency and low frequency, wherein high, intermediate frequency disturbs and can remove by analog-and digital-filtering.Low frequency part is the most difficult, and this is because the metering time of dynamic shaft metering is shorter, generally can not receive the complete low-frequency cycle, so it is occurred with height or intermediate frequency form.As when the weighing platform rigidity Design, can not should make its natural frequency higher only according to the LOAD FOR strength and stiffness, get more than 15～20Hz.Stop is guaranteeing that it is littler to be tried one's best in weighing platform free gap in the horizontal direction under the impregnable prerequisite of weight transfer, and the vibration that horizontal impact power is transited out of reflects with high frequency like this.
Normal dynamic weight sample waveform at first carries out analog filtering by instrument hardware to it shown in Fig. 4-a, because of hardware filtering as filtering to such an extent that can make distorted signals too resolutely, so only use its elimination HFS.Shown in Fig. 4-b, at this moment eliminated high frequency interference through the waveform of analog filtering.
Second step was that it is carried out first order digital filtering, this one-level filtering does not have in conventional processing, concrete mode is: adopt the sampling rate higher about 5 times than usual manner to receive number, it is point of per 1～2ms, the interrupt mode sampling, then 10 sampled values are averaged as one group, with it as a significant figure, promptly; a
1=(a
1+ a
2+ ... a
10)/10; a
2(a
11+ a
12+ ... a
20)/10 ... so again by a
1, a
2, a
3The curve that couples together is just more smooth and undistorted, the actual waveform after this handles just shown in Fig. 4-C, but like this with regard to the interference of the intermediate frequency in the elimination signal.
What each weight shifted generation during automobilism is that low frequency is disturbed, and this is the most unmanageable, and Fig. 5 is the weight signal wave mode after previous stages is handled, method routinely, be to adopt positive transition to declare to send a car, ending (single shaft) is declared in negative saltus step, and gets a
0～a
nSection is a valid interval.As can be seen from Figure, the low-frequency disturbance that an interval interior signal mode produces owing to factors such as each weight transfers, waveform is irregular, and discreteness is bigger, and this is the one of the main reasons that causes the dynamic shaft measuring accuracy lower.So how address this problem? by conscientious analysis, we find the last half period of first low-frequency vibration always than rule, though discreteness is not little, and its average nearly all identical (automobile of identical weight is under friction speed).Therefore get this interval (a among the figure
i～a
j) be valid interval, with a
i～a
jEach interior efficiently sampling value is repeatedly rolled smoothly (processing of second level digital filtering), obtains mean value then, and this is worth good reproducibility, just can obtain variable quite accurately after the dynamic gain correction.Adopt this data processing disposal route, effect is very good.On differentiating, be that benchmark is reliable still with the positive transition edge, and available a
0～a
nBetween sampled value and the sampling rate of regulation calculate the speed of a motor vehicle, wheelbase or declare vehicle.
By taking above-mentioned each technical measures, can make the dynamic measurement precision of a metering-type truck scale that a bigger raising is arranged.
Advantage of the present utility model is: because the cost of axle metering-type truck scale is well below car load formula truck scale, and has higher measuring accuracy, therefore have vast market prospect.
Description of drawings:
Fig. 1 is the circuit block diagram and the user mode synoptic diagram of the utility model weighing instrument
Fig. 2 is the utility model position limiter device structural representation
Fig. 3 is that the utility model sensor connects the adjusting mechanism synoptic diagram
Fig. 4 a～4c is the utility model sampled signal filter processing method synoptic diagram
Fig. 5 is that the utility model is repeatedly crossed car wave form analysis figure
With the structure drawings and Examples the utility model is done further carefully to state below:
As shown in Figure 1, when the weight of automobile is delivered to sensor by weighing platform, sensor converts force signal to electric signal and delivers to the dynamic weighing instrument, through amplifying, filtering, A/D conversion and handle after become gravimetric value and show and print.In weighing instrument, power panel is that benchmark supplies power supplies such as bridge source, CPU, A/D converter, display, storer, and sensor is installed in the mechanical scale body, is connected with instrument by terminal box.
Among Fig. 2: two hinges 4 and 11 of stop all are equipped with oscillating bearing, guarantee that it is flexible in the vertical direction activity, position-limited rack 2 and limit base 12 are separately fixed on weighing platform support 1 and the basic framework 13, left limit bar 5 is connected with hinge 4, setting nut 7 respectively with a left side, right limit bar 5 is connected with 9, and there are locknut 6 and 8 in its both sides, and split pin 10 is positioned on hinge axis 11 places.
As shown in Figure 3, sensor 16 is installed in below the weighing platform 21, and fixes with set bolt 14 and 14 '.Upper and lower pressure head 18 and 20 is the ball bowl-type, and the centre contains a steel ball 19, and seaming chuck 18 has setting nut 17 and locknut 15 with the connection place design of sensor 16, also is provided with set collar 22 at the two ends of push-down head 20.
Claims (1)
1. the dual-purpose high precision axle of sound attitude metering-type electronic vehicle weighing apparatus mainly is that the sensor coupling arrangement and the control instrument of weighing are formed, it is characterized in that by stop means:
A: the control instrument of weighing mainly is by terminal box, the amplification filtering circuit, and A/D converter, cpu central processing unit, display, memory, printer connect and compose for the bridge source;
B: in the stop means, two hinges 4 and 11 all are equipped with oscillating bearing 3, position-limited rack 2 and limit base mouth are separately fixed on weighing platform support 1 and the basic framework 13, left limit bar 5 is connected with hinge 4, setting nut 7 is connected with 9 with left and right gag lever post 5 respectively, left and right being arranged with of setting nut 7 revolved locknut 6 and 8, and split pin 10 is located at hinge 11 places;
C. in the sensor coupling arrangement, sensor 16 be installed in weighing platform 21 below, and with set bolt 14 and 14 ' fixing, upper and lower pressure head 18,20 is the ball bowl-type, the centre contains a steel ball 19, the connection place of seaming chuck 18 and sensor 16 is provided with regulates mother 17 and locking mother 15, also is provided with retainer plate 22 at the two ends of push-down head 20.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96241324 CN2320991Y (en) | 1996-10-28 | 1996-10-28 | High-precision axonometric electronic balance for vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96241324 CN2320991Y (en) | 1996-10-28 | 1996-10-28 | High-precision axonometric electronic balance for vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2320991Y true CN2320991Y (en) | 1999-05-26 |
Family
ID=33915751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96241324 Expired - Fee Related CN2320991Y (en) | 1996-10-28 | 1996-10-28 | High-precision axonometric electronic balance for vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2320991Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100434881C (en) * | 2006-04-24 | 2008-11-19 | 江承学 | Front dynamically-measuring protecting balance of automobile |
| CN103323085A (en) * | 2012-03-22 | 2013-09-25 | 北京盘天科技发展有限公司 | Vehicle dynamic weighing device |
| CN103398761A (en) * | 2013-07-12 | 2013-11-20 | 太仓市豪阳汽车内饰件有限公司 | Weighbridge device for automobile |
| CN114935394A (en) * | 2022-06-23 | 2022-08-23 | 河南省计量科学研究院 | Automatic regulating device for limiting of truck scale |
-
1996
- 1996-10-28 CN CN 96241324 patent/CN2320991Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100434881C (en) * | 2006-04-24 | 2008-11-19 | 江承学 | Front dynamically-measuring protecting balance of automobile |
| CN103323085A (en) * | 2012-03-22 | 2013-09-25 | 北京盘天科技发展有限公司 | Vehicle dynamic weighing device |
| CN103323085B (en) * | 2012-03-22 | 2015-09-02 | 北京盘天科技发展有限公司 | A kind of dynamic weighing device for vehicle |
| CN103398761A (en) * | 2013-07-12 | 2013-11-20 | 太仓市豪阳汽车内饰件有限公司 | Weighbridge device for automobile |
| CN114935394A (en) * | 2022-06-23 | 2022-08-23 | 河南省计量科学研究院 | Automatic regulating device for limiting of truck scale |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1025889C (en) | Vehicle weighing in motion apparatus and method | |
| CN2466625Y (en) | Pull-pressing spring tester | |
| CN212058570U (en) | Detection equipment for brake disc production | |
| CN108871776A (en) | Bullet train axle non-destructive tests testing stand based on vibratory response | |
| CN2653465Y (en) | Dynamic weighing system | |
| CN2320991Y (en) | High-precision axonometric electronic balance for vehicle | |
| CN107727223A (en) | A kind of computational methods of weighing apparatus load-carrying | |
| CN114894424B (en) | Wind-tunnel tail boom model ground pre-installation debugging device | |
| CN201072357Y (en) | Axes measuring dynamic automatic electric light track weighbridge | |
| CN215709022U (en) | Dynamic and static vehicle-mounted weighing device of kitchen self-discharging garbage truck | |
| CN212988560U (en) | Food high-precision weighing meter | |
| CN209312101U (en) | Novel weight and charge system | |
| CN203299007U (en) | Calibration tool for car suspension system | |
| CN203116829U (en) | Dynamic vehicle weighing device | |
| CN2463258Y (en) | Overload and bias load detecting device for railway vehicle | |
| CN2397472Y (en) | Copper pipe taper measurer for crystallizer | |
| CN218035318U (en) | Weighing platform outer frame of automobile weighing apparatus | |
| CN2213987Y (en) | High precision dynamic axle measure electronic automobile weighing | |
| CN104121980A (en) | Factory-leaving calibrating device of large weighing apparatus | |
| CN2236646Y (en) | Dynamic and static rail balancer | |
| CN217930501U (en) | Weighing sensor of automobile weighing apparatus | |
| CN214372862U (en) | Anti-skid electronic truck scale with automatic cleaning function | |
| CN212828040U (en) | Automatic add sign indicating number developments truck scale intelligence and examine weighing apparatus car | |
| CN219608199U (en) | Electronic truck scale with clearance structure | |
| CN218035316U (en) | Weighing structure of automobile weighing apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |