WO2012102647A2 - Procédé et système de pesage de précision élevée d'un véhicule de transport en mouvement - Google Patents

Procédé et système de pesage de précision élevée d'un véhicule de transport en mouvement Download PDF

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Publication number
WO2012102647A2
WO2012102647A2 PCT/RU2012/000102 RU2012000102W WO2012102647A2 WO 2012102647 A2 WO2012102647 A2 WO 2012102647A2 RU 2012000102 W RU2012000102 W RU 2012000102W WO 2012102647 A2 WO2012102647 A2 WO 2012102647A2
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Prior art keywords
readings
series
measurements
weighing
reading
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PCT/RU2012/000102
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English (en)
Russian (ru)
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WO2012102647A3 (fr
Inventor
Владимир Ильич РЕЧИЦКИЙ
Original Assignee
Rechitskiy Vladimir Ilyich
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Publication of WO2012102647A2 publication Critical patent/WO2012102647A2/fr
Publication of WO2012102647A3 publication Critical patent/WO2012102647A3/fr

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Classifications

    • 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
    • G01G19/022—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles for weighing wheeled or rolling bodies in motion
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G23/00—Auxiliary devices for weighing apparatus
    • G01G23/18—Indicating devices, e.g. for remote indication; Recording devices; Scales, e.g. graduated
    • G01G23/36—Indicating the weight by electrical means, e.g. using photoelectric cells

Definitions

  • the present invention relates to vehicles weighing techniques, in particular, during their weighing in motion (WIM) along a highway (hereinafter, the term "will be used on an equal footing with the term” vehicle " car”).
  • WIM weighing in motion
  • a vehicle is weighed on a platform equipped with stationary scales at the entrance to a toll or controlled highway, as well as on similar sites organized on the highway itself (RF patent for utility model JN ° 88469, publ. 10.1 1.2009; US patent Jfc 6980093 , publ. 12/27/2005). It is clear that in this case, weighing gives a static value and requires stopping the movement and entering a special platform equipped with a weighing device of sufficiently high accuracy. Therefore, talking about weighing in the process of movement for such a method of weighing can only conditionally.
  • the site http://www.cross.cz/en/wim-weigh-in-motion describes a method for weighing vehicles when they move along a highway equipped with weight sensors that make it possible to determine the pressure on the road surface from each a passing axle, or even each passing wheel of a vehicle.
  • Reader devices are installed near such weight sensors, which allow one or another identification mark of a vehicle traveling at that moment to move along the weight sensor to be read.
  • the read data together with the time stamp are sent to the data processing center, where they are processed using a special program for preliminary determination of the traffic load.
  • this system may introduce an error when, after weighing with the WIM weight sensor, the vehicle with excess weight has time to unload before entering the static exact scales, according to the readings of which the WIM weight sensor reading will be corrected, which correctly shows the advantage of this a car. Disclosure of invention
  • the purpose of the present invention is to develop such a method and such a system for correcting the readings of weighing devices when the vehicle is moving along the track, which would significantly improve the measurement accuracy of all weight sensors installed on the track, including regardless of changes in the weight of the truck facilities.
  • a method for improving the accuracy of weighing a vehicle in motion which consists in the following: they install weighing devices on the track for generation or axle weighing vehicle, in this case one of these weighing devices, which has a higher accuracy compared to other weighing devices, is taken as a reference weighing device, and its readings are taken as reference readings; placing a reading device near each of the weighing devices, configured to read at least one of the identification marks with which the motor vehicle traveling through the weighing device is equipped, while recording the time of this reading; receive, in the data processing center, the indication of each weighing device when the wheels or wheels of each axle of a particular vehicle are traveling along it, while at least one identification mark of that vehicle is read by an appropriate reader and the time of this reading is fixed; form a series of measurements from the readings of weighing devices received at the data processing center, separately for each wheel or for each axis of the vehicle with the same identification mark; those measurement series are selected in which
  • a feature of the method of the present invention is that the received data of the weighing devices together with the corresponding identification marks can be stored in the memory of the data center.
  • Another feature of the method of the present invention is that the steps to generate measurement series, select measurement series and equalize readings can be performed for readings of all weighing devices installed on the track.
  • Another feature of the method of the present invention is that in each series of measurements the following actions can be carried out: compare with the corresponding reference reading the readings of successive weighing devices following the track for the same wheels or axles of the identified a motor vehicle; forming a series of measurements from at least two readings of weighing devices following each other on the track, the deviations of which from the reference reading are less than a predetermined threshold; upon deviation of the next indication in the formed series of measurements from the reference indication by an amount not less than a predetermined threshold exclude this indication from this series of measurements; if the following indication after deviation from the reference indication deviates by an amount not less than a predetermined threshold, this indication is also excluded from this series of measurements and compared with the previous excluded indication; in the presence of a predetermined number of consecutively excluded readings whose deviation from each other is less than a predetermined threshold, complete the current series of measurements and begin a new series of measurements with these next consecutive readings excluded from this series of measurements; average the readings of all weighing devices that make up a new series of
  • the predetermined number of consecutively excluded indications may be equal to two or more.
  • the readings of some weighing device differ from the reference reading by an amount not less than a predetermined threshold in the first predetermined number of consecutive measurement series, then temporarily exclude the readings of this weighing device from subsequent series of measurements, but continue to receive them and comparison in the data center; if then the readings of this weighing device differ from the reference reading by an amount less than a predetermined threshold in the second predetermined number of consecutive series of measurements, then the aforementioned temporary exclusion of the readings of this weighing device, beginning with the next series of measurements, is canceled if - rhenium reading of this weighing device differs from the reference reading by an amount less than a predetermined threshold; if the indications of a certain weighing device differ from the reference indication by an amount not less than a predetermined threshold in the third predetermined number of consecutive series of measurements exceeding the aforementioned first predetermined number, then the reception of indications from this weighing device is stopped and its malfunction is recorded.
  • a predetermined threshold can be selected not less than the spread of the readings of the most inaccurate of the used weighing devices.
  • the reference weighing device can be selected so that the dispersion of its readings, characterizing its accuracy, is at least half that of the readings of the most accurate of the remaining weighing devices.
  • Another feature of the method of the present invention is that the values corrected with respect to the reference value obtained for all wheels or for all axles of the identified vehicle separately in each measurement series can be summed to find the axle weight or the weight of the entire vehicle means that have passed the respective weighing devices.
  • Another feature of the method of the present invention is that the correction can be performed after a predetermined time interval or by commands from the information processing center. At the same time, teams can issue when changing environmental characteristics beyond pre-set limits.
  • Environmental characteristics can be selected from the group consisting of air temperature, atmospheric pressure, the presence or absence of cloud cover, the presence or absence of precipitation, the type of precipitation, and the surface characteristics of the road surface.
  • the following actions can be performed: in the series of measurements in which equalization was carried out, for each weighing device, in addition to the reference, the ratio of the readings of the given weighing device received at the data center to this series to the value to which this indication was equated; in any of the subsequent series of measurements in which no equalization is carried out, the readings of each weighing device are corrected in addition to the reference taking into account the calculated ratio.
  • the weighing means can be installed on sections of the route for which the minimum turning radius, slope and unevenness of the coating are set based on the passport requirements of the used weighing devices.
  • the second object of the present invention proposes a system for improving the accuracy of weighing a vehicle in motion, comprising: weighing devices mounted on the track for the generation of axial or axial weighing a vehicle, with one of these weighing devices having higher accuracy compared to other weighing devices, taken as a reference weighing device, and its readings are taken as a reference readings; reading devices, each of which is located near a respective weighing device and is configured to read at least one of the identification marks with which a motor vehicle traveling through this weighing device is equipped with simultaneously recording the time of this reading; data center, made with the possibility: to take the reading of each weighing device when passing on it the wheels or wheels of each of the axles of a particular motor vehicle with the simultaneous reading of at least one identification mark of this motor vehicle with an appropriate reading device and with fixing the time of this reading; to form a series of measurements from the readings of weighing devices received at the data center, individually for each wheel or for each axis of the vehicle with the same identification
  • the data processing center may comprise a memory for storing received readings of weighing devices together with corresponding identification marks.
  • the data center can be configured to take steps to generate measurement series, select measurement series and equate readings for all weighing devices installed on the track.
  • the data center can be configured to perform the following actions: to compare with the corresponding reference reading the readings of successive weighing devices on the track for the same wheels or axles of an identified motor vehicle; to form a series of measurements from at least two readings of weighing devices following each other on the track, the deviations of which from the reference readings are less than a predetermined threshold; when the next indications in the generated series of measurements from the reference indication by an amount not less than a predetermined threshold to exclude this indication from this series of measurements; if the next reading after the excluded reading deviates from the reference reading by an amount not less than a predetermined threshold, exclude this reading from this series of measurements and compare it with the previous deleted reading; if there is a predetermined number of consecutively excluded readings whose deviation from each other is less than a predetermined threshold, complete the current measurement series and begin a new series of measurements with these next consecutive readings excluded from this series of measurements; average the readings of all weighing devices that make up a new series of measurements; calculate
  • the predetermined number of consecutively excluded indications may be equal to two or more.
  • the data center can be configured to perform the following actions: if the readings of some weighing device differ from the reference readings by an amount not less than a predetermined threshold in the first predetermined number of consecutive series of measurements, temporarily exclude the readings of this weighing devices from the subsequent series of measurements, but continue to receive and compare them in the data center; if then the readings of this weighing device differ from the reference readings by an amount less than a predetermined threshold in the second predetermined number of consecutive series of measurements, cancel the temporary exclusion of the readings of this weighing device, starting with the next series of measurements, if in this series of - measurements, the reading of this weighing device differs from the reference reading by an amount less than a predetermined threshold; if the indications of a certain weighing device differ from the reference indication by an amount not less than a predetermined threshold in the third predetermined number of consecutive series of measurements exceeding the aforementioned first predetermined number, stop receiving readings from this weighing device and fix its malfunction .
  • Another feature of the system of the present invention is that
  • the reference weighing device can be selected so that the dispersion of its readings, characterizing its accuracy, is at least half that of the readings of the most accurate of the remaining weighing devices.
  • the data center can be configured to summarize the values obtained for all wheels or for all axles of the identified vehicle individually in each measurement series to find the axle weight or the weight of the entire vehicle.
  • Another feature of the system of the present invention is that the data center is configured to perform equalization after predetermined time intervals.
  • the system of the present invention may further comprise sensors located near at least some weighing devices and designed to determine environmental characteristics selected from the group consisting of air temperature, atmospheric pressure, presence or absence of cloudiness, presence or absence precipitation, type of precipitation, characteristics of the surface of the road surface, while the data processing center is made with the ability to carry out equalization according to the commands issued on the basis of ove of signals received from these sensors.
  • the data center can be performed with the ability to perform the following actions: in the series of measurements in which the adjustment was carried out, for each weighing device, in addition to the reference, calculate the ratio of the data center, the readings of this weighing device in this series to the value to which this readings were equated; in any of the subsequent series of measurements in which no equalization is performed, correct the readings of each weighing device in addition to the reference taking into account the calculated ratio.
  • weighing devices can be installed on sections of the track for which the minimum turning radius, slope and unevenness of the coating are set based on the passport requirements of the weighing devices used.
  • FIG. 1 shows a schematic diagram of a system in which the method of the present invention is implemented.
  • FIG. 2 shows a block diagram of the algorithm for taking readings during the passage of several axes of the weighing device.
  • FIG. 3 is a flowchart of a metering algorithm for subsequent correction in accordance with the present invention.
  • FIG. Figure 1 shows four weighing devices 3.1 - 3.4, but their number, of course, is not limited to just four.
  • the first weighing device 3.1 is conditionally highlighted by an additional dashed line in order to emphasize that this weighing device is taken as a reference, because it has a higher accuracy compared to other weighing devices 3.2 - 3.4.
  • accuracy is understood as the fact that the scatter of the readings of this weighing device 3.1, just characterizing its accuracy, for example, is half the scatter of the readings of the most accurate of the other weighing devices 3.
  • the reference weighing device 3.1 is shown installed on the track 1 itself, but in some cases it may be more appropriate to take it to a special platform near the track 1.
  • the specific location of the reference weighing device 3.1 and the principle of its operation is not important for implementing the method of the present invention.
  • the reference weighing device can be located almost anywhere on track 1. For example, on a two-way track there can be only one platform with a reference weighing device located at one end of this track. At In this case, the reference weighing device will be the first for vehicles entering this route, or the last for vehicles leaving this route. Either a standard weighing device can be located in the middle of track 1.
  • All other weighing devices 3.i are designed for weighing vehicles traveling along highway 1 in direction 2.
  • it can be sensors used in the above-mentioned weighing devices of the Czech company Cross; or fiber optic sensors described in the patent of the Russian Federation for utility model N ° 13925 (publ. 10.06.2000), in US patents N ° 4560016 (publ. 24.12.1985) and K ° 5260520 (publ. 09.1 1.1993), in the application Great Britain JN ° 2250813 (publ. 06/17/1992) or in the application of Korea _Ns 2004/0102878 (publ.
  • Weighing (non-standard) devices 3 are placed in the roadbed of track 1 in each lane across the direction 2 of movement of vehicles. This arrangement of the weighing devices 3 allows you to measure the weight of the car passing through each weighing device 3, axially. If it is required to determine the weight by the generation, then each weighing device 3 is divided into two parts, as described, for example, in the aforementioned RF patent N ° 2390734. It is advisable to install weighing devices 3 where the speed of the vehicle is expected to be constant, t. e. on sections of track 1 having a turning radius (rounding), height irregularities and slopes are not greater than predetermined values.
  • the radii of rounding of such segments, their slopes and unevenness in height, and possibly some other parameters are normalized (certified) by manufacturers of the used weighing devices.
  • Weighing devices 3 are installed on the track 1 at predetermined distances, which, as seen in FIG. 1 are not necessarily the same. It is clear that the more often weighing devices 3 are located on track 1, the easier it is to control not only the weight, but the movement of the vehicle, but at the same time the cost of the system used and the complexity of managing it will increase.
  • a reader 4l is placed near each of the weighing devices 3.i (including the reference).
  • Each such reading device 4 is arranged to read at least one of the identification marks with which a motor vehicle is currently driving through a corresponding weighing device 3.i.
  • identification marks can be both state registration numbers, and, for example, radio-identification tags (radio-identifiers, RFID) fixed on motor vehicles.
  • the reading device 4 is, for example, a video camera and (or) a reader, the implementation of which allows the identification tags to be used.
  • a reading device 4.i located next to it simultaneously fixes the reading time. For example, when using video cameras as readers 4, such time fixing is performed automatically.
  • the signals from the weighing devices 3 and the reading devices 4 are transmitted to the data center 5. Such a transmission can be carried out either by wire or wirelessly by any means currently known or being developed in the future.
  • the data processing center 5 can integrate weighing devices 3 and reading devices 4 into a local network in which the corresponding protocol is used for signal transmission. The specific method of data exchange between weighing devices 3, reading devices 4 and data center 5 does not matter.
  • the data processing center 5 carries out the necessary data processing using an appropriately programmed processor (computer, controller, etc.) and has a memory for storing - at least temporarily - the data received from the weighing devices 3 and reading devices 4, and for storing the results of processing the received data.
  • an appropriately programmed processor computer, controller, etc.
  • FIG. 2 is a block diagram of an algorithm for initial processing of data received from weighing devices 3 and reading devices 4 in the data processing center 5.
  • the sensor of this weighing device 3.2 first generates a signal proportional to the weight of the front axle of the passing vehicle.
  • the second reader 4.2 located nearby at the same time registers the corresponding identification mark (s) with which the vehicle is equipped.
  • the received data goes to the data processing center 5, which at step 21 receives the next reading of the weighing device 3.2.
  • the data processing center 5 receives the signal from the reader 4.2 and recognizes the identifier of the passing vehicle.
  • the processor in the data center 1 recognizes the state registration number and (or) determines a different identifier assigned to this vehicle.
  • the data center 5 receives the next reading of the weighing device 3.2, but the identifier read by the second reader 4.2 remains the same (step 22). Therefore, in the data processing center 5, the new reading of the weighing device 3.2 is stored together with the previous reading and with the same identifier (step 23). If now after the passing car (let it be a two-axle car) the front axle of another motor vehicle hits the sensor of the second weighing device 3.2, the reader 4.2 will transmit to the data center 5 other data other than the previously transmitted data.
  • the processor in the data processing center 5 recognizes another vehicle from this data and remembers the data obtained from the weighing device 3.2 along with another identifier. Thus, data from all axes (or from all wheels) of the same vehicle will be recorded in the memory of the data center 5 with the same identifier, but for different vehicles these identifiers will be different.
  • this algorithm can also be implemented using other means.
  • an induction loop can be integrated in the roadway next to the weighing device 3. While the axles of the same vehicle (and even the axles of its trailer) pass through this weighing device, an electric current is induced in this induction loop due to the moving mass of the vehicle. But as soon as this car passes through the weighing device 3, the current in this induction loop will drop sharply, which may be defined by a separate threshold scheme.
  • Hitting the weighing device 3 of another car, even driving almost “close” to the one that has already passed, will cause a new increase in current in the induction loop, which will also be recognized by the corresponding threshold circuit (see www.citylines.ru/telematica/obespechenie_bezopasnosty_14. html).
  • the specific types of threshold schemes are well known to specialists.
  • those series of measurements are selected in which deviations of the readings of at least some of the weighing devices 3 located one after the other from the corresponding reference display (ie, from the reading of the reference weighing device 3.1 in this example) is less than a predetermined threshold.
  • a predetermined threshold In the case when the reference weighing device is not located at the beginning of track 1, such series of measurements for a particular vehicle are stored in the data center 5 before the vehicle passes through the reference weighing device. After that, the readings of all weighing devices 3 composing this series of measurements are equated with the corresponding reference reading (ie, the reading of the reference weighing device for the same axis of the same vehicle). Note that in the data processing center 5, it is possible to store the readings of any, including all, weighing devices 3.
  • step 31 in the data center 5 the readings from successive readings are sequentially received or already received and stored in the memory of the data center 5 hom over the track 1 of weighing devices 3 for the same wheels or axles of an identified motor vehicle with the corresponding reference indication. Recall that the reception and comparison of readings can occur at different times if the reference weighing device is not at the beginning of track 1.
  • the deviation of the next reading (reading of the next weighing device 3.1) from the reference reading is determined.
  • step 33 the readings of the entire previous series of measurements are equated with the reference reading and the comparison is repeated at step 31, but for the next reading (readings of the next weighing device 3. (i + l)) for the same axis of the same vehicle, determined from the data from the corresponding reader 4.
  • the value of the predetermined threshold used in step 32 is selected based on at least the known accuracy of the sensors used in the weighing devices 3. For example, a predetermined threshold can be selected not less than the spread of the readings of the most inaccurate of the used weighing devices 3.
  • the reference weighing device (3.1 in this example) has a spread of readings characterizing its accuracy, at least half that of the readings of the most accurate of the remaining weighing stroystv 3.
  • the reference weighing device may be non much, then correction can be carried out by addition of these indications reference weighing device on which the vehicle has traveled is of interest afterwards.
  • step 34 this reading is excluded from this series of measurements and in step 35 save it separately.
  • step 36 it is checked how many consecutive exceptions are already available from this series of measurements. If the number of exceptions is less than the predefined one (“yes” at step 37), then at step 38 all readings in this series of measurements are equated to the reference reading except for the readings excluded from it. After that, the following reading in this series is compared with the reference reading.
  • step 39 a new series of measurements is started with these next consecutive readings excluded from this, i.e. now completed a series of measurements. If in the newly started series of measurements the deviations of the following consecutively excluded readings, determined at step 36, do not exceed the threshold mentioned above, then at step 40 all these readings are averaged, and at step 41 the readings in this new series are equated with a reference reading proportional to the ratio of the value averaged in a new series of measurements to the reference reading. Those.
  • Excluded readings may be further processed. For example, if the readings of some (k-th) weighing device Z.k differ from the reference readings by an amount not less than a predetermined threshold in the next several series of measurements (let us call this number of consecutive exceptions the first predetermined number), then this may indicate a likely malfunction of this (k-th) weighing device. Therefore, the readings of this weighing device Z.k are temporarily excluded from the subsequent series of measurements, but they continue to be received and compared in the data processing center 5.
  • the first predetermined number is three
  • the second predetermined number is four
  • the third predetermined number is six. It is clear that the third predetermined number cannot be less than the first predefined number, but otherwise the specific values of the first, second and third predefined numbers can be determined by the reliability requirements of the system under consideration or other considerations that take into account both the requirements of manufacturers and and various regulatory documents.
  • the readings of the fifth weighing device 3.5 after passing along the first axis of the next vehicle along it, are temporarily excluded from all subsequent series of measurements, i.e. from series for all remaining axles of this next (second) car and all subsequent cars.
  • the fifth weighing device 3.5 suddenly starts to give “good” readings, and this is repeated for two biaxial riders one after another cars, i.e. deviations of its indications from the reference value are four times less than a predetermined threshold, then for the first axis of another vehicle the readings of the fifth weighing device 3.5 are again included in the series of measurements.
  • the second predetermined number is taken to be four.
  • the fifth weighing device 3.5 is generally excluded from work.
  • the third predefined number is six.
  • This example shows that the third predetermined number does not depend on the second predetermined number, but is larger than the first predetermined number. Given this condition, all three of these predefined numbers can be selected by any.
  • Equalization can be carried out by any of the above methods, i.e. directly or taking into account the calculated ratio in the case of a sharp change in the readings of weighing devices.
  • the readings of each weighing device 3 are corrected in addition to the reference taking into account the calculated ratio. It does not matter through which weighing devices 3 the evaluated motor vehicle passed, i.e. whether they included a reference weighing means, for example, if the car did not enter highway 1 at its beginning and (or) did not leave it at the end.
  • the method of the present invention allows to find the axial weight or the weight of the entire vehicle by summing the readings for all axles or for all wheels of the identified vehicle individually in each measurement series. If it is necessary to charge for the transportation of a certain cargo along route 1 to a certain distance (which is usually calculated in units of ton-km), to achieve maximum accuracy, you can use the readings of all weighing devices 3 (the distances between which are known in advance), through which A motor vehicle of interest traveled, with the above correction of these readings of the present invention, even in the case of a “non-standard” measurement series. The transit time of a known distance between weighing devices can be taken into account to record the fact of a change in vehicle loading.
  • the data received in the memory of the data center 5 are received, i.e. the original, uncorrected readings of weighing devices 3 with the corresponding identification marks can be used for subsequent analysis of the road situation, etc.
  • the method and system of the present invention can improve the accuracy of measurements of all weight sensors installed on the track, including in the case of a change in the weight of the vehicle.

Abstract

L'invention concerne des techniques de pesage en mouvement de véhicules (weigh in motion - WIM) lors du déplacement. Son utilisation permet d'augmenter sensiblement la précision des mesures des capteurs de poids disposés sur la chaussée, y compris indépendamment du changement de poids du véhicule de transport. Une meilleure précision de pesage du véhicule en mouvement est assurée par les éléments suivants : on monte sur la chaussée des dispositifs de pesage pour effectuer le pesage d'un véhicule roue par roue ou essieu par essieu, les indication de l'un des dispositifs possédant une plus grande précision étant acceptés comme ayant une valeur d'échantillon; on dispose près de chacun des dispositifs de pesage un dispositif de lecture de l'étiquette d'identification d'un véhicule de transport circulant; dans le centre de traitement de données on reçoit les indications d'un véhicule de transport donné et on enregistre simultanément au moins une étiquette d'identification de ce véhicule de transport par un dispositif de lecture correspondant, et l'on fixe le temps de cette lecture; on forme dans le centre de traitement de données une série de mesures sur la base des indications des dispositifs de pesage, séparément pour chaque roue et / ou pour chaque essieu du véhicule de transport avec un même étiquette d'identification; on sélectionne les séries de mesures dans lesquelles les déviations de valeurs du dispositif de pesage par rapport à une valeur échantillon sont inférieures à un seuil prédéterminé; et on met à égalité les indications des dispositifs de mesure composant cette série de mesures à une valeur échantillon correspondante. эталонному показанию.
PCT/RU2012/000102 2011-01-24 2012-02-17 Procédé et système de pesage de précision élevée d'un véhicule de transport en mouvement WO2012102647A2 (fr)

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RU2011102457/28A RU2448331C1 (ru) 2011-01-24 2011-01-24 Способ и система повышения точности взвешивания автотранспортного средства в движении

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