Device and method for detecting speed measurement errors of speedometer of motor vehicle

Abstract

The invention discloses a device and method for detecting speed measurement errors of a speedometer of a motor vehicle. The device at least comprises two portal frames arranged in a spaced mode. Vertically-downward laser distance measuring sensors are arranged on the portal frames and used for recording information of time when the vehicle passes the distance measuring sensors, and a height information value of the point is acquired through the change the length of of a laser transmission path. The laser distance measuring sensors send the detected time information and detected height information to a computing unit through a controller, the computing unit sends data of the computed time information, the computed height information, computed speed information, computed image information and the like to a central management unit, and the central management unit is a management system based on a computer, a server and software. According to the device and method for detecting the speed measurement errors, high-accuracy speed measurement and high-accuracy measurement of the speed measurement errors of the speedometer can be acquired, and meanwhile engineering installation is simple and cost is low.

Description

technical field [0001] The invention relates to a speed measurement error detection device and detection method of a motor vehicle speed measuring instrument, which calculates the running speed of the vehicle by measuring the time required for social vehicles to pass through the detection road section with high precision, and provides standard reference data for the speed measuring equipment to be detected. Background technique [0002] With the rapid development of economy and society, the number of motor vehicles and traffic flow have increased significantly, the demand for road traffic has increased rapidly, and the road traffic situation has become increasingly severe. Irregular and uncivilized driving behavior is or will seriously affect the safety of driving. Safety, especially the irregular behavior of driving speed has become a major hidden danger of traffic accidents. At present, there are relevant regulations on various road speeds at home and abroad. Whether the ...

AI Technical Summary

Problems solved by technology

[0008] (1) Specific experimental vehicles can only provide standard speeds of individual speed points of individual models as measurement samples, which cannot truly reflect the speed of various social vehicles

[0009] (2) The standard speed provided by the specific experimental vehicle is still the standard speed within a certain error range, which will affect the detection of the speed measurement error of the speedometer

[0010] (3) At present, the cost of experimental vehicles is very high and the service life is short, so that they cannot be used on a large scale, nor can they meet the needs of speedometer detection under the rapidly increasing traffic pressure

[0014] (1) The piezoelectric sensor needs to be buried under the high-speed road in advance, which not only requires the quality of the road pavement to be strict, but also the piezoelectric sensor buried under the high-speed road for a long time is prone to deformation due to the continuous rolling of vehicles and the influence of weather and environment changes Damage, large amount of later maintenance, high construction cost

Piezoelectric sensors require traffic control during construction of buried facilities, which affects the normal driving of vehicles and is more prone to traffic safety accidents

[0015] (2) The piezoelectric speed measurement system cannot distinguish vehicle types, so that separate detection data cannot be obtained for vehicles such as trucks, buses, and cars

And can not analyze the speed measurement error of the speedometer to various vehicles

[0016] (3) In the existing piezoelectric speed measurement system, the piezoelectric speed measurement system and the social vehicle speed measured by the detected speedometer are two completely independent data, and the correlation comparison between the detected value and the standard value requires manual screening and sorting statistics

[0021] (1) The opposite or reflected wireless waves parallel to the road in one lane will be emitted by vehicles on other lanes and interfere with the speed measurement process, so it is only suitable for single-lane speed measurement

[0022] (2) The speed measuring equipment of this technical solution cannot distinguish vehicle types, so that separate detection data cannot be obtained for vehicles such as trucks, buses and cars

And can not analyze the speed measurement error of the speedometer to various vehicles

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