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Float weighing sensor and PID deviation control method for dynamic coeighing

A weighing sensor and dynamic weighing technology, applied in the field of weighing sensors, can solve the problems of reducing reliability and response speed, increasing costs, and complicated circuit design

Inactive Publication Date: 2005-03-23
孔令宇
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the input and output function relationship of the resistance strain sensor is nonlinear, and the strain gauge is pasted with adhesive, so there are technical defects such as creep and hysteresis caused by the adhesive, as well as zero point and sensitivity drift.
In addition, the resistance strain sensor, in order to correct its nonlinearity, complicates the circuit design, increases the cost, and reduces its reliability and response speed.

Method used

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  • Float weighing sensor and PID deviation control method for dynamic coeighing
  • Float weighing sensor and PID deviation control method for dynamic coeighing
  • Float weighing sensor and PID deviation control method for dynamic coeighing

Examples

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Embodiment Construction

[0038] figure 1 Is the specific embodiment of the buoyancy load cell, in the figure:

[0039] Cylinder body (1), electromagnet shell (5), coil shell (9), cover (10) form the integral shell of buoyancy weighing sensor, and indicator needle (17) is fixed on the upper end face of cover (10).

[0040] Connecting piece (12), the permanent magnet (13) that is fixed on the central axis position of its lower end surface of the lower end of the connecting piece (12) with an inner arc surface, and a magnetic attraction made of magnetically permeable material with an inner arc surface on its upper end surface. The live hanging joint (15), the sphere (14) placed in the middle of the two corresponding solitary surfaces of the permanent magnet (13) and the magnetic suction live hanging joint (15), the displacement suspension fixed at the lower end of the magnetic suction live hanging joint (15) Rod (11) forms magnetic force centering suspension rod mechanism. The connecting piece (12) is ...

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Abstract

The invention belongs to weight sensing technology field. The flotage weight sensor is made up of flotage balancer, weighing liquid leakage preventing mechanism, shit signal transmitting device and magnetic centering suspending mechanism. It converts the linear relation of gravity value based on the flotage theory into prominent shift value, and outputs with electric signal. It has no technology deficiencies such as slow change and zero point, and sensitivity excursion. The invention also provides a method for flotage weight sensor in PID error control when in dynamic weight metering. What is detected and controlled by the method is error of the weighted material to the set weight in dynamic weighing process. The positive and negative error value measured by the method, they counteracted in the dynamic weighing process, thus the accuracy of weighing can be upgraded greatly.

Description

technical field [0001] The invention belongs to the technical field of weighing sensors, and in particular relates to a buoyancy weighing sensor with a linear relationship output without technical defects such as creep, zero point, and sensitivity drift; A PID deviation closed-loop control method based on a resistance strain type load cell. Background technique [0002] At present, resistance strain sensors are commonly used in the field of weighing technology, and the core of its technology is the sensitive element—resistance strain gauge. Its working principle is to paste the resistance strain gauge on the metal elastic element. When the elastic element is deformed by gravity, the resistance strain gauge will produce a corresponding change in resistance due to the deformation, and generate a voltage output, thereby measuring the measured force. value. There are two types of resistance strain gauges: metal strain gauge type and semiconductor strain gauge type, among which...

Claims

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Application Information

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IPC IPC(8): G01G5/00G05D15/00
Inventor 孔令宇孔祥鼒
Owner 孔令宇
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