Truck scale sensor for detecting quantity of automobile tires

A technology for automobile tires and sensors, applied in the field of sensors, can solve the problems of permanent damage, sensitive components cannot be accurately detected, and sensitive components are easily damaged, and achieves the effect of stable and reliable work, accurate movement and solid structure
CN102163370AActive Publication Date: 2011-08-24SHAANXI SIWEI WEIGHING APP LIMITED
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHAANXI SIWEI WEIGHING APP LIMITED
Publication Date
2011-08-24

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Abstract

The invention relates to a truck scale sensor for detecting the quantity of automobile tires. The sensor comprises a support shaft, a base, at least one returning spring and at least one sensitive element, wherein the support shaft can do finite movement in an axial direction; the base is used for installing the support shaft; the returning springs are used for providing restoring force for the support shaft; the sensitive elements are used for detecting the positional change of the support shaft and outputting a change signal; the support shaft is movably installed in the base; the sensitiveelements are installed on a side surface of the support shaft; in the absent of wheel pressing, the support shaft moves to an upper point under the action of the returning springs and then the sensitive elements output a state; and when a wheel presses, the support shaft moves to a lower point and then the sensitive elements output another state. By the sensor, the defects of high false rate and short service life of the traditional actually-used weighing sensor are overcome, and the defects expressed by an axel identification machine of several non-weighting sensors recorded in documents areovercome. Moreover, the sensor has the remarkable advantages of low requirement for processing accuracy, simplicity in assembly and strong output signals.
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Description

technical field

[0001] The invention relates to a sensor for detecting the number of tires or axles of passing vehicles in a road system, which belongs to the field of measurement. Background technique

[0002] Highway governance overrun and weight-based tolling require accurate measurement of the number of tires or axles of vehicles. For a long time, it has been mainly used for weighing sensors, and some people have tried to use infrared sensors, but they have not been seen due to the diversity and randomness of on-site conditions. Used successfully.

[0003] At present, a group of load cells arranged at a certain distance are used to measure the number of tires and axles. When a wheel presses over the sensor, the pressed sensor will output a voltage. Through amplification and comparison processing, it is determined whether there is wheel pressure. However, the number of sensors that are pressed can determine whether it is a single tire or a double tire.

[0004] The adva...

Claims

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