Absolute measurement linear micrometer made with capacitive grid sensor

Abstract

The invention discloses an absolute measurement linear micrometer produced by adopting a capacitance sensor, and the absolute measurement linear micrometer comprises a measurement rod, a framework body, and a main grid and an auxiliary grid of the capacitance sensor, wherein a rear section rod body of the measurement rod is installed inside the framework body through a front support, a rear support, a single orientation mechanism a double-orientation mechanism, the front section of the measurement rod stretches out of the framework body, a main grid seat is installed on the rear section rod body of the measurement rod, the capacitance sensor comprises a calibration sensor and a measurement sensor with absolute measurement functions, the calibration sensor and the measurement sensor are respectively arranged on the front surface and the back surface of the framework body or in front and behind the front surface of the framework body, a main grid of the calibration sensor and a main grid of the measurement sensor are arranged on the measurement rod through the main grid seat, an auxiliary grid of the calibration sensor and an auxiliary grid of the measurement sensor are arranged on the framework body, and a reasonable sensing clearance is formed between each main grid and each auxiliary grid. The absolute measurement linear micrometer has the absolute measurement function with exclusive measurement result, so that the measurement precision is improved, the effective measurement range is long, the cost is low, and the production process is simple.

Description

(1) Technical field: [0001] The invention relates to a measuring instrument, in particular to an absolute measuring linear micrometer made by a capacitance sensor. (2) Background technology: [0002] Micrometer is a precision instrument widely used in length measurement. It is used for automatic measurement of precision parts (such as automobile parts, bearing parts, etc.), to measure the geometric shape error of parts and the correctness of mutual positions of parts. [0003] The traditional micrometer is driven by a lever, so that the reciprocating motion of the measuring rod becomes the angular displacement of the pointer, and the value is indicated on the dial. It has the advantages of simple structure, reliable operation, and portability. [0004] With the development of sensing technology, the micrometer adopts digital display measurement value, which can visually display the reciprocating movement of the measuring rod. The most representative one is the micrometer us...

AI Technical Summary

Problems solved by technology

[0005] The inductance sensor, its measuring principle is that the magnetic core moves in the coil and corresponds to different inductance values ​​at different positions, the coil is fixed on the housing of the micrometer, the magnetic core is installed on the measuring rod, and the measuring rod The movement is converted into the corresponding induction value of the magnetic core at different positions of the coil, and the displacement of the measuring rod is obtained through the calculator connected with the circuit. The measurement result is directly obtained by means of digital display, and there is a one-to-one correspondence between the measured value and the position. It has the function of absolute measurement of displacement, but its disadvantages are complex manufacturing process, high production cost, short effective measurement range, etc.

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