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State detection method and device for weighing sensors

A technology of state detection device and weighing sensor, which is applied in the direction of weighing indicating device, weighing temperature compensation device, measuring device, etc., can solve the problem of inability to accurately locate sensor faults, and achieve the effect of improving user satisfaction

Inactive Publication Date: 2021-02-02
METTLER TOLEDO (CHANGZHOU) PRECISION INSTR CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method and device for detecting the state of a weighing sensor in view of the problem that existing sensor detection cannot accurately locate the fault of the sensor, so as to provide users with more direct and meaningful detection Judgment, so as to help customers accurately find out where the faulty sensor or potential faulty sensor is, avoid measurement errors caused by sensor problems, and improve user satisfaction

Method used

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  • State detection method and device for weighing sensors

Examples

Experimental program
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Embodiment 1

[0029] Platform scales are electronic weighing instruments between platform scales and truck scales. They are widely used in industrial production, commodity trading and daily life. The platform scale can include a plurality of, for example, multi-point weighing composed of four load cells, and the load cells are installed at corresponding weighing positions of the platform scale.

[0030] (1) Differential detection of zero weight

[0031] Before the platform scale is calibrated, the weighing platform needs to be leveled. If there is an uneven weighing platform, it will seriously affect the linearity and hysteresis of the weighing platform, resulting in inaccurate weighing. Therefore, when the weighing platform is empty, if it is detected that the outputs of the four sensors are relatively close, it indicates that the weighing platform has been leveled. When the weighing platform has been used for a period of time, or a sensor is displaced due to improper operation by the us...

Embodiment 2

[0062] The tank system is widely used in industrial and agricultural production, and can include multiple, such as multi-point weighing composed of 4 load cells.

[0063] (1) Abnormal detection of zero weight data

[0064] When the tank system is calibrated, the zero output of each sensor is basically consistent to ensure the accuracy of the measurement. When the material tank is shifted on the weighing foundation, the output of a certain sensor will often be too large or too small, which will seriously affect the accuracy. A method for detecting the state of a load cell in this embodiment is applied to a material tank system, and the material tank system includes three load cells.

[0065] A method for detecting the state of a load cell in this embodiment is applied to a material tank system, including:

[0066] Step S401, collecting the weight characteristic data W of each load cell Mi .

[0067] Among them, M i represents the corresponding load cell, thus forming The...

Embodiment 3

[0093] Multi-point weighing technology is also commonly used in vehicle scale systems. A vehicle scale system in this embodiment is composed of 8 load cells.

[0094] In vehicle scale applications, each load cell is equipped with a gas sensor for air tightness detection. By comparing the difference in gas concentration between sensors, the air tightness of one or several sensors can be judged. There is a problem.

[0095] A method for detecting the state of a load cell in this embodiment is applied to a vehicle scale system, including:

[0096] Step S701, collecting gas characteristic data of each weighing sensor

[0097] The vehicle scale system of this embodiment first collects the gas characteristic data of each weighing sensor Form gas characteristic data queue

[0098] Step S702, calculating abnormal values ​​in the gas characteristic data.

[0099] In this embodiment, the most value detection algorithm is used to detect the difference between the weight feature...

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Abstract

The invention provides a state detection method and device for weighing sensors. The state detection method for weighing sensors is applied to a multi-point weighing system, and comprises the following steps: collecting feature data of each weighing sensor; calculating an abnormal value in the feature data; and when the abnormal value exists, obtaining corresponding weighing sensor information andoutputting the weighing sensor information. By means of the state detection method and device for the weighing sensors, a client can be helped to accurately find out the fault sensor or the potentialfault sensor, measurement errors caused by sensor problems are avoided, and the use satisfaction degree of the user is improved.

Description

technical field [0001] The invention relates to weighing measurement technology, in particular to a method and device for detecting the state of a weighing sensor. Background technique [0002] For weighing systems, such as vehicle scales, platform scales, large material filling scales, etc., multi-point measurement is adopted, that is, the scale in the weighing system is composed of multiple load cells. Each load cell will transmit the weighing data to the terminal, and display the weighing data. At the same time, each load cell will also transmit its other characteristic sensing data, such as power supply voltage, current, temperature, humidity, gas, angle, etc., to the terminal. The terminal then displays all the sensing data to the user through the terminal interface for the user to observe whether the data is abnormal. [0003] However, for users, the uploaded sensory data often does not produce actual value. In many cases, users are not sensitive to these feature se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01G23/01G01D21/02
CPCG01G23/01G01D21/02G01G23/48G01G23/18
Inventor 吴建伟杨建强毕留刚
Owner METTLER TOLEDO (CHANGZHOU) PRECISION INSTR CO LTD
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