CN105092880A - Device for shaft rotation speed measurement and method thereof - Google Patents

Abstract

The invention discloses a device and a method for measuring the rotating speed of shafts. It includes a mechanical part and an electrical part. The mechanical part includes a measuring disc, a cantilever beam and a base. Head, display and single-chip microcomputer control circuit, wherein the measuring disc is installed on the measured shaft through interference fit, the infrared light emitted by the infrared light-emitting diode is received by the infrared receiving head through the light guide groove on the measuring disc, and the single-chip microcomputer The number of pulses output by the infrared receiving head is collected internally to realize the speed measurement. The invention has simple structure and wide application range, and can effectively measure the rotational speed of various rotating shaft parts.

Description

A device and method for shaft speed measurement

technical field

The invention relates to a device and a method for measuring the rotational speed of a shaft, in particular to a device and a method for measuring the rotational speed of a shaft.

Background technique

In actual industrial control, it is urgent and objective to measure the speed of shaft components such as rotating shafts and motors. At present, there are many measurement methods, such as the use of optical methods, tachogenerator speed measurement, etc., which are cumbersome to install and troublesome to operate. At the same time, optical components It has high requirements on the environment and is susceptible to external interference, which affects the accuracy.

Contents of the invention

Aiming at the shortcomings in the background technology, the present invention proposes a device and method for measuring the rotational speed of shafts.

In order to solve the above technical problems, the present invention is solved through the following technical solutions:

A device and method for shaft speed measurement, including a mechanical part and an electrical part, the mechanical part includes a measuring disk, a cantilever beam and a base, and the electrical part includes a power supply, a triode, an infrared light-emitting diode, an infrared receiving head, a display and The single-chip microcomputer control circuit, in which the measuring disc is installed on the measured shaft through interference fit, the cantilever beam is mechanically connected with the base, and the infrared light-emitting diode and the infrared receiving head are installed at both ends of the cantilever beam. When installing, the infrared light-emitting diode and the infrared receiving head are at At the same height, the power supply supplies power to the entire measurement system, the infrared light-emitting diode is electrically connected to the triode, and the triode, the infrared receiving head, the display and the single-chip microcomputer control circuit are electrically connected. The single-chip microcomputer control circuit controls the infrared light-emitting diode to emit infrared light through the triode, and there is only one light guide groove on the measuring disc. In between, the optical path from the infrared light-emitting diode to the infrared receiving head is turned on, and the infrared receiving head can receive the infrared light passing through the light guide groove and output a pulse signal. Using the internal timer of the single-chip microcomputer, it is calculated at time t (unit: Seconds), real-time acquisition of the number of pulse signals output by the infrared receiving head is N, then the rotational speed of the measured shaft per minute is 60×N/t (unit: revolution per minute), and the result is displayed on the display.

Preferably, the infrared receiving head adopts a pulse type receiving head, which is convenient for measuring the output pulse signal; the display adopts a seven-segment digital tube display.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings without any creative effort.

Figure 1 is a schematic view of the appearance and structure of a device and method for shaft speed measurement according to the present invention;

Explanation of symbols: 1—measuring disc, 2—infrared light-emitting diode, 3—cantilever beam, 4—light guide groove, 5—infrared receiving head, 6—display, 7—single-chip microcomputer control circuit, 8—measured axis, 9— Base, 10—power supply.

Detailed ways

The present invention will be further described in detail below in conjunction with the examples, the following examples are explanations of the present invention and the present invention is not limited to the following examples.

Example 1:

A device and method for shaft speed measurement, as shown in Figure 1, includes a mechanical part and an electrical part, the mechanical part includes a measuring disc 1, a cantilever beam 3 and a base 9, and the electrical part includes a power supply 10, a triode, Infrared light-emitting diode 2, infrared receiving head 5, display 6 and single-chip microcomputer control circuit 7, wherein the measuring disc 1 is installed on the measured shaft 8 through interference fit, the cantilever beam 3 is mechanically connected with the base 9, the infrared light-emitting diode 2 and the infrared ray The receiving head 5 is installed on the two ends of the cantilever beam 3. When installing, the infrared light-emitting diode 2 and the infrared receiving head 5 are at the same height. The power supply 10 supplies power for the entire measurement system. The infrared light-emitting diode 2 is electrically connected with the triode, and the triode, the infrared receiving head 2, The display 6 is electrically connected with the single-chip microcomputer control circuit 7.

Working principle: As shown in Figure 1, the measuring disk 1 is installed on the measured shaft 8 through interference fit during operation, and there is a light guide groove 4 on the measuring disk 1, and the single-chip microcomputer control circuit 7 is controlled by a triode The infrared light-emitting diode 2 emits infrared light. In one rotation period of the measured shaft 8, only when the light guide groove 4 is located between the infrared light-emitting diode 2 and the infrared receiving head 5, the optical path from the infrared light-emitting diode 2 to the infrared receiving head 5 Only when it is turned on, the infrared receiving head 5 can receive the infrared light passing through the light guide groove 4 and output a pulse signal, and use the internal timer of the single-chip microcomputer to calculate within the time t (unit: second) to collect the output of the infrared receiving head 5 in real time If the number of pulse signals is N, the rotational speed of the measured shaft per minute is 60×N/t (unit: revolution per minute), and the result is displayed on the display.

In addition, it should be noted that the specific embodiments described in this specification may be different in terms of parts, shapes and names of components. All equivalent or simple changes made according to the structure, features and principles described in the patent concept of the present invention are included in the protection scope of the patent of the present invention. Those skilled in the art to which the present invention belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, as long as they do not deviate from the structure of the present invention or exceed the scope defined in the claims. All should belong to the protection scope of the present invention.

Claims (2)

1. the devices and methods therefor for the tachometric survey of axle class, comprise mechanical part and electric part, mechanical part comprises measurement disk, semi-girder and base, electric part comprises power supply, triode, infrarede emitting diode, infrared receiving terminal, display and single chip machine controlling circuit, wherein measuring disk is installed on measured axis by interference fit, semi-girder and base are mechanically connected, infrarede emitting diode and infrared receiving terminal are arranged on semi-girder two ends, during installation, infrarede emitting diode and infrared receiving terminal are in sustained height, power supply is that whole measuring system is powered, infrarede emitting diode and triode are electrically connected, triode, infrared receiving terminal, display and single chip machine controlling circuit electrical connection.

2. a kind of devices and methods therefor for the tachometric survey of axle class according to claim 1, it is characterized in that: described single chip machine controlling circuit controls infrarede emitting diode by triode and sends infrared light, described measurement disk only has a guide-lighting groove, in a swing circle of measured axis, only have when guide-lighting slot is between infrarede emitting diode and infrared receiving terminal, infrarede emitting diode is to the light path just conducting of infrared receiving terminal, now infrared receiving terminal just can receive the infrared light through guide-lighting groove and export a pulse signal, utilize single-chip microcomputer timer internal, calculate in time t (unit: second), the pulse signal number that Real-time Collection infrared receiving terminal exports is N, then measured axis rotating speed per minute is 60 × N/t (unit: rpm), and result is shown to display.