Pointer type reading device with digital function

Abstract

The invention relates to a pointer type reading device with the digital function, comprising a dial scale and a pointer arranged on the dial scale, wherein a rotating center of the pointer is connected with the upper end of a rotating shaft extending on the dial scale in a coaxial way; the pointer type reading device also includes a sensor used for converting the circumferential displacement of the pointer into electrical signal output, and the sensor is a circle grid-capacitance sensor which can detect the rotating angle of the rotating shaft and has the function of absolute coding; the circle grid-capacitance sensor is arranged under the dial scale in a coaxial way and connected with a special large-scale integrated circuit, so that the rotating angle of the rotating shaft detected by the circle grid-capacitance sensor and the scale value pointed by the circumferential displacement of the pointer are in the relationship of one-one correspondence; two-piece reflection-type structure or three-piece transmission-type structure can be adopted by the circle grid-capacitance sensor; a coupler is arranged at the lower end of the rotating shaft, so as to be convenient for being connected with an output shaft of a meter core, thus forming the pointer type meter with the digital function. The pointer type reading device maintains the advantage of visual pointer display, so as to be convenient for the application of digitization, remote and intellectualization of the meter; furthermore, the pointer type reading device has the advantages of simple structure, accurate metering and low cost.

Description

(1) Technical field: [0001] The invention relates to a reading device, in particular to a pointer reading device with digitization function used in pointer instruments. (two) background technology: [0002] Pointer instruments (such as flow meters, temperature meters, odometers and pressure gauges, etc.) are widely used in various fields. The pointer instrument is composed of a movement and a pointer reading device. The reading is determined by the value indicated by the circular displacement of the pointer on the dial. The way of reading data is observed by human eyes, which is simple and convenient. However, with the development of automation technology, especially computer control technology, in order to make the pointer instrument cooperate with automatic measurement and control, and make it used in data recording, data and control, data and network connection, some pointer instruments have evolved into The technical means of digitizing the pointer instrument is to digi...

AI Technical Summary

Problems solved by technology

[0003] However, the above-mentioned digital pointer instruments still have disadvantages such as complicated assembly, high cost, and poor working reliability.

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