High-precision pressure sensor experimental model and experimental method

Abstract

The invention discloses a high-precision pressure sensor experimental model and an experimental method, and relates to the technical field of automatic detection and sensing, in particular to the field of pressure measurement and high-precision conversion and display of a strain gauge, and provides a sensor experimental model which can be freely assembled and disassembled and innovatively designed by a user. The experimental model comprises a base, a support, a cantilever beam and a weighing pan, wherein the support is arranged in the middle of the base, the cantilever beam is arranged at the top end of the support, and one end of the cantilever beam is fixed to the support through a bolt to form a cantilever beam structure; suspending holes are formed in the edges of the weighing pan, a thin rope penetrates through the suspending holes to suspend the weighing pan at the other end of the cantilever beam, and the strain gauge is arranged on the cantilever beam. The high-precision pressure sensor experimental model is provided with an independent detection system, the detection system comprises a shell and a detection circuit board, and a signal processing circuit, a key circuit, a single-chip microcomputer small system circuit, a display circuit, an over-limit warning circuit, a serial port communication circuit and a power source circuit are arranged on the detection circuit board.

Description

technical field [0001] The invention relates to a high-precision pressure sensor experimental model and its experimental method, which relate to the technical field of automatic detection and sensing, and more specifically to the fields of strain gauge pressure measurement, high-precision conversion and display, and are convenient for users to freely disassemble and assemble. Innovatively designed sensor experiment model. Background technique [0002] Today, with the rapid development of technology, sensors are indispensable in a complete automatic detection system, and pressure detection is an important aspect in the field of automatic detection. There are many sensors used for pressure detection, and the strain gauge sensor is a typical load cell among them. [0003] At present, the knowledge of strain gauge pressure detection is taught in the course teaching of automation, electronic information and other majors in undergraduate and vocational colleges, and the experimen...

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Problems solved by technology

[0005] ①The sensor uses a commercial weighing force sensor, in which the cantilever beam is a standard elastic material, and the strain gauge has been pasted on the cantilever beam. Students cannot understand the force-sensitive characteristics of different elastic materials, nor can they try to paste the strain gauge by themselves

[0006] ②The measurement circuit template has been prepared and cannot be changed. The selected circuit is an analog circuit. The circuit design is too old and the measurement accuracy is low. It is not conducive for students to understand the current advanced design methods of pressure sensor circuits.

[0007] ③Although the test bench is equipped with a digital display device, it only displays the voltage value output by the measuring circuit, and often the voltage value does not correspond to the pressure value (weight of the object), and the accuracy is poor

[0008] ④ The entire sensor detection system device and circuit are fixed, and there is no room for modification, and users cannot carry out innovative designs on the basis of the original system

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