CN102494750A - Detecting system and detecting method for unbalanced loading of transportation vehicles - Google Patents

Detecting system and detecting method for unbalanced loading of transportation vehicles Download PDF

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Publication number
CN102494750A
CN102494750A CN2011103923359A CN201110392335A CN102494750A CN 102494750 A CN102494750 A CN 102494750A CN 2011103923359 A CN2011103923359 A CN 2011103923359A CN 201110392335 A CN201110392335 A CN 201110392335A CN 102494750 A CN102494750 A CN 102494750A
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China
Prior art keywords
loading
mcu
unbalance
circuit
displacement
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Pending
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CN2011103923359A
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Chinese (zh)
Inventor
胡欣
张相洪
尹立军
李燕军
杨涵
谢先达
史长虹
刘赫
刘雪强
钱星
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Quartermaster Research Institute of General Logistics Department of CPLA
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Quartermaster Research Institute of General Logistics Department of CPLA
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Priority to CN2011103923359A priority Critical patent/CN102494750A/en
Publication of CN102494750A publication Critical patent/CN102494750A/en
Pending legal-status Critical Current

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Abstract

The invention relates to a detecting system and a detecting method for unbalanced loading of transportation vehicles, which solve the safety problem of unbalanced loading of vehicle transportation and comprise a microprogrammed control unit (MCU), a key board, a displayer, a communication unit, a displacement sensor, a signal conditioning circuit, a digital interface circuit, a photoelectric isolation circuit, an alarm unit, a read only memory/random access memory (ROM/RAM) and a detecting system of a clock circuit. A linear displacement sensor with high accuracy is adopted, when a vehicle is loading goods in detection, the system performs alarm to displacement variation or weight variation of a vehicle axle in the four directions of the front side of the bottom of a carriage, the rear side of the bottom of the carriage, the left side of the bottom of the carriage and the right side of the bottom of the carriage, thereby enabling the goods to be loaded in a balanced mode and ensuring transportation safety. The detecting system and the detecting method for the unbalanced loading of transportation vehicles are mainly applied to the field of daily transportation, military, scientific research and the like and occasions which have strict requirements on unbalanced loading conditions.

Description

Carrier vehicle unbalance-loading detection system and detection method
Technical field
The present invention relates to the detection of carrier unbalance loading situation, particularly about a kind of carrier vehicle unbalance-loading detection system and detection method, balance during the prompting cargo loading guarantees the automobile transportation safety.Be mainly used in fields such as daily life, transportation, military affairs, scientific research.
Background technology
Unbalance loading detects, and the safety of transport by road is had very big meaning, in transport by road, because the accident that unbalance loading causes happens occasionally, but also do not cause people's extensive concern.In transportation by railroad, it has been that safety of railway traffic detects an important content in the link that unbalance loading detects.But in transport by road, also do not obtain enough attention.The unbalance loading detecting sensor of the railway system is installed in sleeper bottom, passing railcar is carried out unbalance loading detect, and is not suitable for not having the detection of the automobile transportation of route, must development be fit to the vehicle unbalance-loading detection system of lorry loading.
The weight tester that uses in the existing automobile mainly contains electronic scales or truck scale.But some problems below existing, (1) electronic vehicle weighing apparatus is as the trade settlement measurement instrument, and is widely-used.The truck scale cardinal principle is pressure-strain stress relation, and the measuring and calculating goods weight mainly adopts resistance strain weighing transducer, and contained goods weight is calculated; (2) electronic scales or truck scale are hard-wired mostly, can detect at point-to-points automobile samely, but cannot detect or monitor with car.
Summary of the invention
To the problems referred to above, it is one simple and practical that the object of the invention provides, and judges the automobile whether a kind of carrier vehicle unbalance-loading detection system and the detection method of unbalance loading to detect the left and right both sides of automobile bodies deflection.
The present invention adopts following technical scheme; Realize its goal of the invention: a kind of carrier vehicle unbalance-loading detection system, it is characterized in that: it comprises MCU, keyboard, display, communication unit, displacement transducer, signal conditioning circuit, digital interface circuit, photoelectric isolating circuit, alarm unit, ROM/RAM and clock circuit; MCU adopts the RS485 interface to link to each other with host computer; Keyboard, display, communication unit, digital interface circuit, photoelectric isolating circuit, ROM/RAM, clock circuit all link to each other with MCU; Displacement transducer is divided into 4 the tunnel and is installed on the left and right both sides in propons left and right both sides, top, compartment bottom and back axle top respectively, links to each other with MCU through behind signal conditioning circuit and the digital interface circuit; Photoelectric isolating circuit also links to each other with alarm unit.
Said MCU is 16 single-chip microcomputers with FLASH structure.
The signal of said sensor adopts I through behind the signal conditioning circuit 2S digital interface form and MCU carry out communication.
Above-mentioned employing MAX488 chip is realized the I of sensor and MCU 2The hardware of S communication connects.
Said No. 4 sensors insert MCU through the analog switch timesharing, and MCU adopts P85, P86 mouth line to link to each other with difference channel, and through P80, P81 mouth line traffic control multiway analog switch.
A kind of carrier vehicle unbalance-loading detection method, can realize that displacement detecting method is through displacement or weight detecting:
1) through man-machine interaction, input displacement threshold value Ks in system;
2) in the lade process, system detects the compartment deflection automatically through 4 sensors, respectively corresponding displacement S1, S2, S3, S4;
3) calculate the poor of left and right sinking displacement: St=S1+S3-S2-S4;
4) unbalance loading is judged:
If: St<-Ks, then report right avertence to carry; If: St>Ks, then report left avertence to carry; Otherwise think the cargo loading symmetery.
The weight detecting method is:
1) through man-machine interaction, the weight threshold Kw that input is judged;
2) in the lade process; System detects the compartment deflection automatically through 4 sensors; And calculate the weight distribution on the four direction of front, rear, left and right automatically according to formula W=k * s: corresponding W1, W2, W3, W4 respectively, wherein W represents weight, and s represents displacement; K is a coefficient, confirms through experiment in advance;
3) calculate the poor of left and right weight: Wt=W1+W3-W2-W4;
4) unbalance loading is judged: if: Wt>Kw, then report left avertence to carry; If: Wt<-Kw, then report right avertence to carry; Otherwise think the cargo loading symmetery.
The present invention has the following advantages owing to adopt above technical scheme: 1, because the sensor that the present invention adopts is installed in the bottom, compartment, detection be of the relative displacement of bottom, compartment with respect to vehicle bridge, therefore, can detect the unbalance loading information of vehicle in real time.2, because detection system of the present invention adopts high performance 16 single-chip microcomputers, can high speed acquisition with handle various data, real-time judge vehicle unbalance-loading state also provides corresponding prompting or warning.3, because the present invention adopts is digital linear displacement transducer, middle without the A/D conversion links, its sampling precision is high, has simplified sample circuit, and response speed is fast, and has improved the accuracy of testing result.4, the communication of displacement transducer and MCU adopts differential signal, improved antijamming capability and the reliability of testing result in the signals transmission.5, MCU can communicate by letter with host computer, functions such as the printing of realization unbalance loading information, analysis.6, reliability of the present invention is high, easy for installation, is widely used, and the warning message of vehicle unbalance-loading can initiatively, accurately, in time be provided in other multiple automobile transportation, and be easy to realize surveying with car test.7, in the system clock circuit is set, year that storage unbalance loading information takes place, the moon, day, the time, branch, second, be provided with the use of post analysis unbalance loading data; Memory adopts non-volatile memory; Data-storing is reliable, and under the situation of power down, its data still can be preserved 10 years.
Description of drawings
Fig. 1 is a principle of the invention block diagram;
Fig. 2 is a sensor of the present invention installation site synoptic diagram;
Fig. 3 is sensor of the present invention and MCU differential signal interface principle figure.
Embodiment
The present invention is a core with 16 F90F340 series monolithics, and the displacement transducer of exporting with high accuracy number is a detecting element, and system calculates corresponding unbalance loading situation, and shows according to the multichannel displacement information that collects.
A kind of carrier vehicle unbalance-loading detection system; As shown in Figure 1, it comprises MCU1 (MB90F340 series monolithic), keyboard 2, display 3, communication unit 4, multichannel displacement transducer 5, signal conditioning circuit 6, digital interface circuit 7, photoelectric isolating circuit 8, alarm unit 9, ROM/RAM 10 and clock circuit 11.System has standard RS485 communication interface, cooperate with host computer and upload unbalance loading information so as to add up, follow-up work such as analysis.
MCU1 and peripheral assembly thereof, and by being solidificated in intrasystem detection, judgement, control supervisor accordingly; Constitute one group of information control unit; MCU regularly reads the multichannel displacement signal, and through calculating the result is shown at display 3 in real time, through the photoelectricity quarantine measures, to ultra unbalance loading signal alarm output, adopts full Chinese to show that the handled easily person uses.
Keyboard 2, display 3 constitute lineup's machine interactive interface.
Alarm unit 9 is arranged in the pilothouse, is convenient to the understanding of driver to vehicle unbalance-loading information.
MCU1 is 16 single-chip microcomputers with FLASH structure, and therefore, memory under program ROM can extend out; In order to realize digitalized calibration and calibration function; Need the various calibrating parameters of storage, native system adopts the ferroelectric ram memory with power-down protection, so that after demarcation; Calibrating parameters is stored to get off, and storage unbalance loading information.
System can store vehicle unbalance-loading information automatically, and the clock circuit in the coupling system 11, year that storage unbalance loading information takes place, the moon, day, the time, branch, second, be provided with the use of post analysis unbalance loading data.Memory adopts non-volatile memory, and data-storing is reliable, and under the situation of power down, its data still can be preserved 10 years.
Of Fig. 2, four linear displacement transducers 5 of the present invention lay respectively at the left and right both sides in propons left and right both sides, top, bottom, compartment and back axle top, detect its displacement with respect to vehicle bridge, are used to differentiate the unbalance loading state.Multichannel displacement transducer 5 links to each other with MCU1 with digital interface circuit 7 through signal conditioning circuit 6, and displacement transducer signal is through behind the signal conditioning circuit 6, through I 2S digital interface circuit 7 links to each other with MCU1.High-precision displacement transducer (can detect the displacement of 0.005mm) adopts digital straight-line displacement mode, and the output signal is the Gray code of difference character, so displacement transducer is with I 2S digital interface form and MCU carry out communication.4 the displacement transducer information in front, rear, left and right are read in system's timesharing, and are inner at main frame, need be the ordinal number word with Gray code conversion, just can calculate.Sensor is output as difference character, and therefore, it connects with MCU's, needs a translation interface, adopts the MAX488 communication interface as I in the native system 2The conversion chip of the interface of S promptly links up displacement transducer and MCU through MAX488, realizes the I of sensor and MCU 2The hardware of S communication connects.Because each sensor input, output differential signal have four lines, MCU is so many interfaces not; Therefore, No. four sensor timesharing are inserted MCU, sample through analog switch; MCU adopts P85, P86 mouth line to link to each other with difference channel; And, select in four sensors with timesharing through P80, P81 mouth line traffic control multiway analog switch, read the value of four displacement transducers in front, rear, left and right.Sensor and MCU interface circuit principle are as shown in Figure 3.
MCU regularly reads the multichannel displacement signal, and through calculating the result is shown at display 3 in real time.Through the photoelectricity quarantine measures,, adopt full Chinese to show that the handled easily person uses to ultra unbalance loading signal alarm output.
The judgement of unbalance loading, the method that adopts testing result and threshold value to compare is judged.The present invention can be applied to dissimilar automobile freight transportation unbalance loadings and detect, and detects if carry out unbalance loading according to bottom, compartment deflection, only need demarcate displacement transducer can be installed on the used automobile, carries out unbalance loading and detects.Adopt weight standard to judge if desired, then need carry out pay load one compartment deflection relation and demarcate, and calibration result is in the system.According to vehicle or unbalance loading discriminant approach, select to adopt displacement to differentiate or the weight differentiation, according to corresponding discriminant approach, import corresponding discrimination threshold.
According to Fig. 2, four displacement transducers are fixedly mounted, under the situation of, no lade intact, press the demarcation key on the control enclosure panel, the demarcation that can finish displacement transducer at vehicle condition.
Automobile bodies deflection and goods weight have certain relation, and sinking displacement and weight are carried out demarcation in the laboratory, because there are certain relation: W=k * s in weight and displacement; W represents weight, and s represents displacement, and k is a variation coefficient; Different phase k value is different, confirms through experiment in advance, and is stored in the Installed System Memory storage; When system works, when detecting different displacement, system adopts corresponding coefficient to come calculated weight automatically.The differentiation of unbalance loading has two kinds of methods, can change as required.
1, adopt displacement directly to calculate
1) through man-machine interaction, the threshold k s that input is judged, threshold value is input in a single day, and system can store this value automatically, needn't operate all at every turn and need import this value;
2) in the lade process, system detects the compartment deflection automatically through four sensors, respectively corresponding displacement S1, S2, S3, S4;
3) calculate the poor of left and right displacement: St=S1+S3-S2-S4;
4) unbalance loading is judged
If: St<-Ks, then report right avertence to carry;
If: St>Ks, then report left avertence to carry;
Otherwise: think the cargo loading symmetery.
2, adopt weight to differentiate
1) through man-machine interaction, the threshold k w that input is judged, threshold value is input in a single day, and system can store this value automatically, needn't operate all at every turn and need import this value;
2) in the lade process, system detects the compartment deflection automatically through four sensors, and calculates the weight distribution on the four direction of front, rear, left and right automatically according to W=k * s: the corresponding W1 of difference, W2, W3, W4;
3) calculate the poor of left and right weight: Wt=W1+W3-W2-W4;
4) unbalance loading is judged
If: Wt>Kw, then report left avertence to carry;
If: Wt<-Kw, then report right avertence to carry;
Otherwise: think the cargo loading symmetery.

Claims (7)

1. carrier vehicle unbalance-loading detection system, it is characterized in that: it comprises MCU, keyboard, display, communication unit, displacement transducer, signal conditioning circuit, digital interface circuit, photoelectric isolating circuit, alarm unit, ROM/RAM and clock circuit;
MCU adopts the RS485 interface to link to each other with host computer;
Keyboard, display, communication unit, digital interface circuit, photoelectric isolating circuit, ROM/RAM, clock circuit all link to each other with MCU;
Displacement transducer is divided into 4 the tunnel and is installed on the left and right both sides in propons left and right both sides, top, compartment bottom and back axle top respectively, links to each other with MCU through behind signal conditioning circuit and the digital interface circuit;
Photoelectric isolating circuit also links to each other with alarm unit.
2. carrier vehicle unbalance-loading detection system as claimed in claim 1 is characterized in that: said MCU is 16 single-chip microcomputers with FLASH structure.
3. carrier vehicle unbalance-loading detection system as claimed in claim 1 is characterized in that: the signal of said sensor adopts I through behind the signal conditioning circuit 2S digital interface form and MCU carry out communication.
4. carrier vehicle unbalance-loading detection system as claimed in claim 3 is characterized in that: adopt the MAX488 chip to realize the I of sensor and MCU 2The hardware of S communication connects.
5. like claim 1 or 3 or 4 described carrier vehicle unbalance-loading detection systems; It is characterized in that: said No. 4 sensors insert MCU through the analog switch timesharing; MCU adopts P85, P86 mouth line to link to each other with difference channel, and through P80, P81 mouth line traffic control multiway analog switch.
6. use like the described system of one of claim 1~5 and carry out a kind of carrier vehicle unbalance-loading detection method that unbalance loading detects, its process is following:
1) through man-machine interaction, input displacement threshold value Ks in system;
2) in the lade process, system detects the compartment deflection automatically through 4 sensors, respectively corresponding displacement S1, S2, S3, S4;
3) calculate the poor of left and right sinking displacement: St=S1+S3-S2-S4;
4) unbalance loading is judged:
If: St<-Ks, then report right avertence to carry;
If: St>Ks, then report left avertence to carry;
Otherwise: think the cargo loading symmetery.
7. use like the described system of one of claim 1~5 and carry out a kind of carrier vehicle unbalance-loading detection method that unbalance loading detects, its process is following:
1) through man-machine interaction, the weight threshold Kw that input is judged;
2) in the lade process; System detects the compartment deflection automatically through 4 sensors; And calculate the weight distribution on the four direction of front, rear, left and right automatically according to formula W=k * s: corresponding W1, W2, W3, W4 respectively, wherein W represents weight, and s represents displacement; K is a coefficient, confirms through experiment in advance;
3) calculate the poor of left and right weight: Wt=W1+W3-W2-W4;
4) unbalance loading is judged:
If: Wt>Kw, then report left avertence to carry,
If: Wt<-Kw, then report right avertence to carry,
Otherwise: think the cargo loading symmetery.
CN2011103923359A 2011-12-01 2011-12-01 Detecting system and detecting method for unbalanced loading of transportation vehicles Pending CN102494750A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105043519A (en) * 2015-08-24 2015-11-11 无锡伊佩克科技有限公司 Weight balance detection system for vehicle
CN107505033A (en) * 2017-07-28 2017-12-22 武汉依迅北斗空间技术有限公司 Overload of vehicle determination methods and system based on the conversion of load measuring sensor measurement signal
CN111141374A (en) * 2019-12-11 2020-05-12 盐城工学院 Anti-unbalance-loading transport trolley and transport system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08254457A (en) * 1995-03-17 1996-10-01 Yazaki Corp Loaded weight calculating device
JP2003004515A (en) * 2001-06-19 2003-01-08 Yazaki Corp Sensor unit, sensor abnormality detector unit and deadweight measuring device
CN101806609A (en) * 2010-02-26 2010-08-18 吉林大学 Automobile unbalanced load status identification and monitoring pre-warning system
CN201637475U (en) * 2010-03-03 2010-11-17 淮阴工学院 Construction traffic side-tilting early-warning device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08254457A (en) * 1995-03-17 1996-10-01 Yazaki Corp Loaded weight calculating device
JP2003004515A (en) * 2001-06-19 2003-01-08 Yazaki Corp Sensor unit, sensor abnormality detector unit and deadweight measuring device
CN101806609A (en) * 2010-02-26 2010-08-18 吉林大学 Automobile unbalanced load status identification and monitoring pre-warning system
CN201637475U (en) * 2010-03-03 2010-11-17 淮阴工学院 Construction traffic side-tilting early-warning device

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Title
郑惠群,朱巧芬: "多功能多通道侧重仪", 《仪表技术与传感器》 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105043519A (en) * 2015-08-24 2015-11-11 无锡伊佩克科技有限公司 Weight balance detection system for vehicle
CN107505033A (en) * 2017-07-28 2017-12-22 武汉依迅北斗空间技术有限公司 Overload of vehicle determination methods and system based on the conversion of load measuring sensor measurement signal
CN111141374A (en) * 2019-12-11 2020-05-12 盐城工学院 Anti-unbalance-loading transport trolley and transport system

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Application publication date: 20120613