What is the measurement principle of the pneumatic measuring instrument? -Huaqiang Electronic Network

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Summary of details:

To understand the digital pneumatic measuring instrument, you must first understand what a pneumatic measuring instrument is, and master the preliminary principles and concepts to help you better understand and use the digital pneumatic measuring instrument.

The principle of a pneumatic measuring instrument is a comparative measurement method. The measurement method is to convert the length signal into a gas flow signal, one is a floating indicator value in a graduated glass tube, which is called a buoy type pneumatic measuring instrument; the other is to convert the gas signal into an electric signal through a gas-electric converter. The column of light consisting of an illuminating tube is called an electronic column type pneumatic measuring instrument.

The pneumatic measuring instrument can be assembled together with different pneumatic probes. The Auqiu instrument can realize the measurement of various parameters. Because of its many advantages, the pneumatic measuring instrument has been widely used in the mechanical manufacturing industry; The main advantages are as follows:

1. There are many measurement items, such as length, shape and position error. Especially for some measurements that are difficult to solve with mechanical measuring tools and measuring instruments, there are many measurable items: inner diameter, outer diameter, groove width, two holes, depth. , thickness, roundness, taper, concentricity, straightness, flatness, parallelism, perpendicularity, air permeability and tightness.

2. The magnification of the measuring instrument is high, the human error is small, it will not affect the measurement accuracy; there is no mechanical friction during operation, so there is no return error.

3, the operation method is simple, easy to learn and easy to master, the most suitable measurement tool for batch measurement.

4. The measuring head is not in direct contact with the measured surface, which reduces the influence of the measuring force on the measurement result, and avoids scratching the surface of the tested part. It is especially suitable for the measurement of thin-walled parts and soft metal parts.

5. Due to non-contact measurement, the measuring head can reduce wear and prolong the service life. A hose connection between the main body of the pneumatic measuring instrument and the measuring head enables remote measurement.

6, simple structure, reliable work, adjustment, use and maintenance are very convenient.

When measuring with a pneumatic measuring instrument, it is necessary to match the measured head with the corresponding measuring head. The measuring head is a key component of the pneumatic measuring instrument; the indication range of the pneumatic measuring instrument is small, generally ±20～±100 μm . According to the range of indication values, common graduation values ​​are 0.5 micron, 1 micron and 2 micron. The allowable error is generally no more than one division value.

Want to know our digital pneumatic measuring instrument, please call the relevant sales staff, will arrange an engineer for you to analyze! For detailed technical parameters, please call (same as WeChat) or email.