CN2061686U - Automatic loadmeter for vehicle - Google Patents

Automatic loadmeter for vehicle Download PDF

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Publication number
CN2061686U
CN2061686U CN 89220168 CN89220168U CN2061686U CN 2061686 U CN2061686 U CN 2061686U CN 89220168 CN89220168 CN 89220168 CN 89220168 U CN89220168 U CN 89220168U CN 2061686 U CN2061686 U CN 2061686U
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circuit
transducer
receiving
vehicle
adopts
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CN 89220168
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Chinese (zh)
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宋清海
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Abstract

The utility model relates to an automatic loadmeter for vehicles designed by adopting the ultrasonic ranging principle, and is composed of a signal transmission source 1, a transmission system 2, a transmission energy device F-[T], a receiving energy conversion device F-[R], a receiving system 3, a J-K trigger 4, a single stable '0' collimation electric circuit 10, a metering oscillator 9, and gate electric circuits 6 and 7, weight indication electric circuit 8, and a power source supply system 5. The automatic loadmeter for vehicles can be arranged on various load-carrying vehicles to directly detect the weight of the loaded goods, and any structure component of the vehicle is in no need of change.

Description

Automatic loadmeter for vehicle
The utility model is a kind of gauging instrument, vehicle load automatic gauge instrument.
Present existing vehicle measuring apparatus mostly is weighbridge and track scale greatly.In recent years, though existing many scientific and technical personnel imagine the measurement technology of electronic scale is applied on the carload automatic gauge, concentrated weighbridge, all need to be inconvenient to change vehicle structure because of project organization complexity, use to replace lorry, shortcomings such as poor reliability, cost height can not be promoted the use of.
The purpose of this utility model, be to propose a kind ofly not change any part of vehicle, structure and be installed in easily between the automobile and railway carriage such as train, steamer and axletree of different model, the situation that can show vehicle loading intuitively, make the driver in pilothouse, just can grasp the vehicle pay load exactly, can also report to the police automatically during overload etc.
Major technique content of the present utility model is, this vehicle load automatic gauge instrument is the principle design that adopts the ultrasound wave precise distance measurement, variation by the goods carrying vehicle charging capacity, relative displacement between railway carriage and the axletree is changed, thereby the time that sound wave is propagated between railway carriage and axletree changes, and the variable quantity of acoustic transit time is converted to corresponding weight.
This automatic gauge instrument is by transmiting signal source 1, emission coefficient 2, transmitting transducer F T, receiving transducer F R, to form o transmiting signal sources 1 be by LS for receiving system 3, J-K flip flop 4, monostable school " 0 ", circuit 10, metering oscillator 9, AND circuit 6,7, weight display circuit 8, power supply system 5 124And capacitor C 1The oscillatory circuit IC that forms 13 4017 frequency divider IC 2, IC 3And IC 4, 2 4081 gate circuit IC 5, IC 6, 2 4069 reverser IC 7, IC 8Form; Emission coefficient 2 is by GB 1And GB 2Form penultimate amplifier, GB 3And GB 4The push-pull amplifier, the transformer T that form 1, coupling inductance H 1Form; Transmitting transducer F TBe loaded on goods carrying vehicle railway carriage bottom by coupling inductance H 1Be connected with emission coefficient; Receiving transducer F RBe loaded on the axletree of goods carrying vehicle, pass through capacitor C 1Be connected transmitting transducer F with receiving system 3 TWith receiving transducer F RBe vertically mounted on the line; Receiving system 3 is by 3 LM 318The operational amplifier IC that forms 9, IC 10, IC 11, active filter LB, 3 3DJ 6The shaping circuit JFT that forms 1, JFT 2, JFT 3With with circuit 4081 IC 12Form; J-K flip flop 4 adopts 4027; Monostable school " 0 " circuit 10 is by 4538 and capacitor C 9, potentiometer W 1Form; Metering oscillator 9 is by LS 124, capacitor C 10, potentiometer W 2Form; AND circuit 6,7 adopts 4081 integrated; Weight display circuit 8 adopts 4 LC 102Power supply system 5 adopts two cover circuit, and a cover is by GB 5And GB 6Transformer T 2The DC converter of forming and 4 rectifier compositions that 2CP6A forms, the 12V DC voltage with on the automobile is converted to-the 5V DC voltage; Another set of is to adopt the adjustable regulator block CW of three ends 317The 12V DC voltage is become+the 5V DC voltage, each parts is used in these two kinds of voltage feeders.
Technique effect of the present utility model is, this automatic gauge instrument is to adopt ultrasonic precise distance measurement method, by variable in distance between loading vehicles railway carriage and the axletree, and changed in sound wave travel-time between railway carriage and axletree, be converted to corresponding weight by the variable quantity of acoustic transit time.Adopt the vehicle load automatic gauge instrument of this method design, not only simple in structure, suitable, measuring accuracy is high but also any structure that need not change vehicle easy to use, be contained in respectively at the bottom of the railway carriage and on the axletree as long as will send out, receive transducer, instrument is loaded in driver's the pilothouse just can intuitively reflect pay load.This instrument can be used on the automobile or train of various different models, and range of application forms for system 5.Transmiting signal source 1 is by the LS as Fig. 2 124And C 1The oscillatory circuit IC that forms 1, 3 4017 frequency divider IC 2, IC 3And IC 4, 2 4081 gate circuit IC 5, IC 6, 2 4069 reverser IC 7, IC 8Form; Emission coefficient 2 is by the GB as Fig. 2 1And GB 2The penultimate amplifier, the GB that form 3And GB 4The push-pull amplifier and the transformer T that form 1, coupling inductance H 1Form; Transmitting transducer F TBe loaded on goods carrying vehicle railway carriage bottom by coupling inductance H 1Be connected with emission coefficient; Receiving transducer F RBe loaded on the goods carrying vehicle axletree and be connected with receiving system 3 by electric capacity; Transmitting transducer F TWith receiving transducer F RBe installed on the vertical straight line; Receiving system 3 is by 3 LM 318The operational amplifier IC that forms 9, IC 10, IC 11, active filter LB, 3 3DJ 6The shaping circuit JFT that forms 1, JFT 2, JFT 3With AND circuit 4081IC 12Form; J-K flip flop 4 adopts 4027, monostable school " 0 " circuit 10 is by 4538 and capacitor C 9, capacitor W 1Form; Metering oscillator 9 is by LS 124, electric capacity 10, potentiometer W 2Form; AND circuit 6,7 adopts 4081 integrated; Weight display circuit 8 adopts 4 LC 102Power supply system 5 adopts two cover circuit, and a cover is by BG 5, BG 6, transformer T 2The rectifier that the DC converter of forming and 4 2CP6A form is formed, and 12V DC voltage on the automobile is converted to-DC voltage of 5V; Another set of is to adopt the adjustable regulator block CW of three ends 317The 12V DC voltage is become+the 5V DC voltage, use for each parts of this instrument.
The transmiting signal source 1 of this automatic gauge instrument, emission coefficient 2, receiving system 3, J-K flip flop 4, monostable school " 0 " circuit 10, AND circuit 6,7, metering oscillator 9, weight display circuit 8, power supply system 5 are assembled into one, be installed in automobilist's pilothouse transmitting transducer F T, receiving transducer F RAll adopt the piezoelectric ceramics transducing extensive.This gauge is to adopt contactless offset variable method to measure in addition, avoided with there being contact method to cause wear problem, therefore, long service life.
Fig. 1 is a block diagram of the present utility model;
Fig. 2 is the utility model signal source, the circuit theory diagrams of emission coefficient;
Fig. 3 is the utility model receiving system, the circuit theory diagrams that weight shows;
Fig. 4 is the circuit theory diagrams of the utility model power supply system;
1 transmiting signal source, 2 emission coefficients, 3 receiving systems, 4J-K trigger, 5 power supply systems, 6,7 AND circuit, 8 weight display circuits, 9 metering oscillators, F TTransmitting transducer, F RReceiving transducer, IC 5, IC 6AND circuit, IC 7, IC 8Reverser, GB 1, GB 2Penultimate amplifier, GB 3GB 4Power amplifier, T 1Output transformer, H 1Coupling inductance, IC 9Follower, IC 10Operational amplifier, LB active filter, IC 11Operational amplifier, JFT 1, JFT 2, JFT 3Shaping circuit, IC 12AND circuit, W 1, W 2Potentiometer, C 1, C 9, C 10Electric capacity, GB 5, GB 6Transducer, 2CP6A * 4 rectifiers, T 2Transformer, CW 317The adjustable regulator block of three ends.
Realize the utility model preferred plan as shown in the figure, this automatic gauge instrument is the principle that adopts ultrasonic ranging, by the change in displacement between goods carrying vehicle railway carriage and the axletree changed the time of sonic propagation, the variation of sound wave being relayed the time is converted to the purpose that corresponding weight reaches automatic gauge.
This vehicle automatic gauge instrument is by transmiting signal source 1, emission coefficient 2, transmitting transducer F as Fig. 1 T, receiving transducer F R, J-K flip flop 4, monostable school " 0 " circuit 10, metering oscillator 9, AND circuit 6,7, weight display circuit 8, power supply be for device, emission parallel operation F TBe installed in load-carrying vehicle railway carriage bottom by lead and emission coefficient coupling inductance H 1Connect receiving transducer F RBe installed on the load-carrying vehicle axletree capacitor C by lead and receiving system 3 1Connect, will be vertical when receiving transducer is installed with transmitting transducer point-blank.
The principle of work of this vehicle load automatic gauge instrument is:
One, transmiting signal source and emission coefficient:
As shown in Figure 2, IC 1Be transmitter oscillator, by C 1Determine its oscillation frequency, the oscillation frequency here is 500KC, and its output is added to frequency divider IC 2With with door IC 6, through IC 2, IC 3, IC 4Behind three grade of ten frequency divider frequency division, IC 3And IC 4Output be added to the door IC 5Two input ends, with door IC 5Output terminal just can to obtain a pulse width be 100 μ S and its cycle is the video pulse of 1S, this video pulse directly causes receiving circuit school " 0 " circuit and the trigger pip of J-K flip flop and clear " 0 " signal of count display as receiving circuit on the one hand, and through inverter ic 7Become negative pulse and prevent to launch the inhibition signal that electric pulse is crosstalked as receiving circuit.While IC 5Output also be added to the door IC 6An input end, with IC 1Output is added to IC 6The emission oscillation frequency of the other end and, IC then 6Output terminal just obtains a frequency for the 500KC pulsewidth is the pulse-modulated signal of 100 μ S, is added to penultimate amplifier GB 1Base stage, simultaneously, IC 6Output through inverter ic 8Be added to penultimate amplifier GB after anti-phase 2Base stage, GB like this 1And GB 2Base stage just can obtain identical and the pumping signal that phase place is opposite of frequency, their output promotes power amplifier GB 3And GB 4, the signal behind power amplifier is through output transformer T 1Be coupled to transmitting transducer F T, and coupling inductance H 1Effect be to penetrate for making transducer can obtain the optimum sound power width of cloth.The transmission frequency of 500KC will be to be launch time 100 μ S like this, and the impulse form that is spaced apart 1S is launched in air, is medium with the air, with the speed of 340 meters of per seconds to receiving transducer F RPropagate.
Two, receiving system and weight display circuit:
As shown in Figure 3, as receiving transducer F RAfter receiving ping, be added to follower IC by the transmitter emission 9, again through amplifier IC 10Deliver to wave filter LB after the amplification, it only fills and is permitted received ping and pass through, and this signal is again through amplifier IC afterwards 11Amplify once more.Being amplified to is enough to the video pulse demodulation is come out, and delivers to by JFT again 1, JFT 2, JFT 3The shaping circuit that constitutes, JFT 3The video pulse τ that is about 100 μ S with regard to an exportable pulsewidth 1'.Its warp and door IC 12Deliver to J-K flip flop IC 13R end.With door IC 12Effect be to provide a negative pulse τ by radiating circuit when x time 0Be added to IC 12An input end, IC 12Block, prevent of the interference of the emission electric pulse of x time receiver, and after the emission, IC 12This input end be always high level, so the acoustical signal τ that receives 1Can be through IC 4Be added to IC 13The R end on, make IC 13Homing action takes place.
Work as x time, from the video pulse τ of radiating circuit 1Trigger monostable circuit IC 14With J-K flip flop IC 13, make IC 14By monostable form work, its Q end is output as high level and is added to and door IC 16An input end, and τ simultaneously 1Also trigger J-K flip flop IC 13Make its upset, its Q end is added to and door IC for low level 16Another input end, IC like this 14The high level and the IC of the output of Q end 13The low level of Q end output is added to respectively and door IC simultaneously 16Two input ends on, as long as IC 14The time width of the high level of Q end is less than or equal to IC 13The low level time width of Q end is with door IC 16Output just be always low level, so just with door IC 17Block, make IC 17No-output.And τ 1When finishing above-mentioned two kinds of functions, return count display IC 18～21" 0 " clearly makes weight be shown as " 0 " kilogram, waits for new weight counting.
Three, the school of instrument " 0 "
The school of instrument " 0 " course of work is: because the T-R transducer F of the heavy instrument of meter RAnd F TAfter on vehicle, installing, F TAnd F RBetween distance just become the amount of knowing, ping is at F so TAnd F RBetween travel-time be exactly the fixing value of knowing.When transmitter is launched ping by transmitting transducer, from the trigger pulse τ of transmitter 1Trigger the monostable IC in school " 0 " simultaneously 14With J-K flip flop action, IC 14Q end output high level (positive pulse), and IC 13Q output low level (negative pulse), and be added to respectively simultaneously with the door IC 16Two input ends, when the sound pulse of receiving becomes the R end that video pulse τ ' is added to J-K flip flop after amplifying shaping, because the effect of τ ' makes IC 13Reset, at this moment IC 13Q end multiple extensive again be high level, therefore, as mentioned above owing to sending and receiving transducer F RAnd F TBetween distance be the value of knowing, so, IC 13The negative pulse width of Q end output also be one to know fixed value.At this moment, school " 0 " the potentiometer W in the monostable circuit of adjusting school " 0 " 1, make monostable IC 14The positive pulse width and the IC of Q end output 13The negative pulse width of Q end output equate, then with door IC 16The output of no high level, with door IC 17Shut and do not have high level output, then count display is shown as 0, and like this, instrument has just been finished school " 0 " work.
Four, weight calibration:
Because after load-carrying vehicle loads, weight will force the relative axletree of railway carriage to produce to bottom offset, load that more the loaded vehicle case amount of moving down is bigger, otherwise it is littler to load the light railway carriage amount of moving down that heals, and therefore, is installed in two transducer F on railway carriage bottom and the axletree respectively TAnd F RBetween distance will change its distance along with varying in weight, and the ultimate principle of this instrument is exactly to measure the variable quantity of its distance and reflect the Weight Loaded that is claimed.But for different vehicle, because the stiffness of the shockproof spring plank of vehicle difference slightly, thereby same weight is for different vehicles, and the displacement of its generation is difference to some extent.So each vehicle all is except that carrying out school " 0 ", also must carry out the weight calibration.
The weight Calibration Method is: after finish above-mentioned school " 0 ", the object of known weight (as the weights of known weight) is put into middle part, railway carriage the inside, at this moment because weight to the railway carriage effect, must force railway carriage to move down, just transducer F TAnd F RDistance between the two becomes near, by transmitting transducer F TThe ping of emission propagates into receiving transducer F RThe required time just reduces.So described in colonel " 0 " process, IC 13Q end output to and a door IC 16The negative pulse width of input end just narrows down, and monostable IC 14The positive pulse of Q end output after get well school " 0 ", its positive pulse width is changeless, therefore, IC at this moment 14Positive pulse width greater than IC 13The negative pulse width of Q end output, both through and door IC 16With, IC 16Output terminal positive pulse output is then arranged, its pulse width is IC just 14The positive pulse and the IC of output 13The phase difference of the negative pulse width of output is count window, and it is added to and door IC 17An input end, and counter oscillator IC 15Oscillation frequency output be added to and a door IC 17Another input end, at this moment count oscillation frequency just can by with door IC 17Output is added to the input end of count display, and making has display digit on the display.Because IC 16Output pulse width be the analog value of vehicle loading weight, so, at this moment regulate IC 15Potentiometer W in the circuit 2, finely tune its oscillation frequency, weight of heavy is consistent in making numeral that display shows and being contained in railway carriage.Promptly at IC 16The pulsewidth of output is regulated the counting oscillation frequency in the time, and the pulse number that count display is counted equals to calibrate the weight of heavy number, and like this, the heavy instrument of meter just calibration is finished, and can carry out the normal load meter and heavily use.

Claims (2)

1, a kind of vehicle load automatic gauge instrument is by transmiting signal source 1, emission coefficient 2, transmitting transducer F T, receiving transducer F R, receiving system 3, J-K flip flop 4, monostable school " O ", circuit 10, metering oscillator 9, AND circuit 6,7, weight display circuit 8, power supply system 5 are formed, and it is characterized in that transmiting signal source 1 is by LS 124And capacitor C 1The oscillatory circuit IC that forms 1, 3 4017 frequency divider IC 2, IC 3And IC 4, 2 4081 gate circuit IC 5, IC 6, 2 4069 reverser IC 7, IC 8Form; Emission coefficient 2 is by GB 1And GB 2The penultimate amplifier GB that forms 3And GB 4The push-pull amplifier, the transformer T that form 1, coupling inductance H 1Form; Transmitting transducer F TBe installed in load-carrying vehicle railway carriage bottom by lead and emission coefficient 3 coupling inductance H 1Connect receiving transducer F RBe installed on the load-carrying vehicle axletree, by the capacitor C of lead and receiving system 3 1Connect transmitting transducer F rWith receiving transducer F RBe installed on vertical one one straight line; Receiving system 3 is formed operational amplifier IC by 3 LM318 9, IC 10, IC 11, active filter LB, 3 3DJ 6The shaping circuit JFT that forms 1, JFT 2, JFT 3With AND circuit 4081IC 12Form; J-K flip flop 4 adopts 4027; Monostable school " O " circuit 10 is by 4538 and capacitor C 9, potentiometer W 1Form; Metering oscillator 9 is by LS 124, capacitor C 10, potentiometer W 2Form; AND circuit 6,7 adopts 4081 integrated, and weight display circuit 8 adopts 4 LC 102Power supply system 5 adopts two cover circuit, and a cover is by GB 5And GB 6, transformer T 2The DC converter of forming 10 and 4 rectifier compositions that 2CTP6A forms with 12V DC voltage on the automobile, are converted to-the 5V DC voltage, and another set of is to adopt the adjustable regulator block CW of three ends 317The 12V DC voltage is become+the 5V DC voltage.
2, vehicle automatic gauge instrument according to claim 1, it is characterized in that, transmiting signal source 1, emission coefficient 2, receiving system 3, J-K flip flop 4, monostable school " 0 " circuit 10, AND circuit 6,7, metering oscillator 9, weight display circuit 8, power supply system 5 are assembled into one, and are installed in automobilist's pilothouse; Transmitting transducer F T, receiving transducer F RAll adopt piezoelectric ceramic transducer.
CN 89220168 1989-11-23 1989-11-23 Automatic loadmeter for vehicle Expired - Lifetime CN2061686U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 89220168 CN2061686U (en) 1989-11-23 1989-11-23 Automatic loadmeter for vehicle

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Application Number Priority Date Filing Date Title
CN 89220168 CN2061686U (en) 1989-11-23 1989-11-23 Automatic loadmeter for vehicle

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CN2061686U true CN2061686U (en) 1990-09-05

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CN 89220168 Expired - Lifetime CN2061686U (en) 1989-11-23 1989-11-23 Automatic loadmeter for vehicle

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100489466C (en) * 2007-08-10 2009-05-20 中国航天科技集团公司第四研究院第四十四研究所 Self-adaptive filtering method of dynamic axle weighing signal of vehicle
CN102590805A (en) * 2012-03-06 2012-07-18 奇瑞汽车股份有限公司 Ultrasonic circuit system for improving range-measuring accuracy
CN102621552A (en) * 2012-01-13 2012-08-01 奇瑞汽车股份有限公司 High-precision ultrasonic range-measuring system
CN103424167A (en) * 2012-05-21 2013-12-04 梅特勒-托利多(常州)测量技术有限公司 Method using finished automobile metering vehicle scale to calculate axle weight
CN103822692A (en) * 2014-02-28 2014-05-28 北京航空航天大学 Freight transport vehicle load monitoring method and device based on ultrasonic ranging sensors
CN114235114A (en) * 2021-12-06 2022-03-25 河南嘉晨智能控制股份有限公司 Ultrasonic weight measuring method

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100489466C (en) * 2007-08-10 2009-05-20 中国航天科技集团公司第四研究院第四十四研究所 Self-adaptive filtering method of dynamic axle weighing signal of vehicle
CN102621552A (en) * 2012-01-13 2012-08-01 奇瑞汽车股份有限公司 High-precision ultrasonic range-measuring system
CN102621552B (en) * 2012-01-13 2013-10-16 奇瑞汽车股份有限公司 High-precision ultrasonic range-measuring system
CN102590805A (en) * 2012-03-06 2012-07-18 奇瑞汽车股份有限公司 Ultrasonic circuit system for improving range-measuring accuracy
CN102590805B (en) * 2012-03-06 2014-02-05 奇瑞汽车股份有限公司 Ultrasonic circuit system for improving range-measuring accuracy
CN103424167A (en) * 2012-05-21 2013-12-04 梅特勒-托利多(常州)测量技术有限公司 Method using finished automobile metering vehicle scale to calculate axle weight
CN103424167B (en) * 2012-05-21 2016-08-03 梅特勒-托利多(常州)测量技术有限公司 Utilize the method that car load measurement vehicle weighing apparatus calculates axle weight
CN103822692A (en) * 2014-02-28 2014-05-28 北京航空航天大学 Freight transport vehicle load monitoring method and device based on ultrasonic ranging sensors
CN103822692B (en) * 2014-02-28 2016-03-02 北京航空航天大学 Based on goods stock load monitoring method and the monitoring equipment of ultrasonic distance-measuring sensor
CN114235114A (en) * 2021-12-06 2022-03-25 河南嘉晨智能控制股份有限公司 Ultrasonic weight measuring method
CN114235114B (en) * 2021-12-06 2024-03-29 河南嘉晨智能控制股份有限公司 Ultrasonic weight measurement method

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