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Calibration of a wim sensor

A sensor and calibration function technology, applied in the field of calibrating dynamic load cells, can solve the problems of complex, expensive rotating wheel force dynamometers, and expensive methods

Pending Publication Date: 2021-08-10
KISTLER HLDG AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Although the method of calibrating the WIM sensor described in the patent document WO11120176A1 can more effectively determine the static weight of the vehicle and compare the WIM signal with the static weight to determine the calibration function, this method is expensive and complicated because a force sensor with a rotating wheel must be used. Dynamometer wheels instead of complete wheels for measuring vehicles
Also, spinning wheel dynamometers are quite expensive

Method used

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  • Calibration of a wim sensor
  • Calibration of a wim sensor
  • Calibration of a wim sensor

Examples

Experimental program
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Embodiment Construction

[0038] figure 1A diagram showing a method for calibrating a WIM sensor 2 arranged in a road 1 by steps a) 101 , b) 102 , c) 103 , d) 104 , steps e) 105 and step f) 106.

[0039] The invention relates to a method of calibrating a WIM (Weighing in Motion) sensor 2; the WIM sensor 2 is arranged in a road 1 flush with the road surface 12, as Figure 8 shown. The WIM sensor 2 determines the force exerted on the road surface 12 . Furthermore, an evaluation unit 7 for providing a calibration function 73 is also provided. To calibrate the WIM sensor 2 a calibration function 73 is used. The calibration function is used to calculate a calibrated WIM force signal 74 from the uncalibrated WIM signal 21 . Determining the calibration function is done by the following steps a) to f) described below.

[0040] In step a) 101, the device (3) is arranged at the location (11) of the vehicle (10), as in Figure 2 to Figure 5 is shown for the exemplary embodiment of the vehicle 10 used in th...

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Abstract

A) The invention relates to a method to calibrate a WIM (Weigh in Motion) sensor 2; which WIM sensor 2 is arranged in a road 1 flush with a road surface 12; which WIM sensor 2 determines a force 85 exerted on the road surface 12 and provides the force 85 determined as a calibrated WIM force signal 74, wherein an evaluation unit 7 calculates a calculated wheel force 71 continuously; the calculated wheel force 71 being dependent on the at least one sensor signal 50,51,52,53,54 and one distance signal 35 and the WIM sensor 2 provides a WIM signal 21 to the evaluation unit 7 as a vehicle 10 passes over the WIM sensor 2; wherein the evaluation unit 7 determines a calibration function 73 based on the calculated wheel force signal 72 and the WIM signal 21, and 15 wherein the calibration function 73 is used for the calibration of the WIM sensor 2.

Description

technical field [0001] The present invention relates to a method of calibrating a weigh-in-motion (WIM) sensor. The invention also relates to a system for calibrating WIM sensors. Background technique [0002] A WIM sensor measures the force that a vehicle exerts by the vehicle's wheels on the surface of a road section as the vehicle travels on the road section. For simplicity, road segments will be referred to simply as roads. Such WIM sensors are generally used in WIM systems with at least one WIM sensor. Furthermore, the WIM system can have at least one additional sensor for vehicle identification, speed measurement or measurement of environmental factors. The WIM sensor is arranged flush with the road surface in such a way that at least one wheel of a vehicle running on the road moves across the WIM sensor. [0003] WIM sensors are commonly used to determine wheel or axle forces or the gross weight of a vehicle. Wheel forces correspond to the proportion of the total...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01G19/02G01G23/01
CPCG01G19/024G01G23/012G01G19/022G01G23/01G01L17/00G01L19/0092G01P15/00G01S19/01
Inventor B·黑尔斯莱西
Owner KISTLER HLDG AG