CN108828256A - Contactless multi-channel synchronous tachometer of measuring - Google Patents

Abstract

The invention discloses a non-contact multi-channel synchronous speed measuring instrument. The measuring instrument includes: a power supply unit; a control unit electrically connected to the power supply unit; a measurement unit including a channel selection module, a signal conditioning module and a non-contact rotational speed sensor, the channel selection module electrically connected to the control unit, Electrically connected to the power supply unit, electrically connected to the signal conditioning module, electrically connected to the non-contact speed sensor; and an input and output unit, communicatively connected to the control unit, connected to the power supply The unit is electrically connected. The measuring instrument is based on the non-contact multi-channel synchronous speed measurement technology to realize the accurate measurement of the real-time speed, and can complete the accurate and reliable speed detection and calibration of the speed standard device.

Description

Non-contact multi-channel synchronous speed measuring instrument

technical field

The invention relates to the field of rotational speed measurement and measurement, and more particularly relates to a non-contact multi-channel synchronous rotational speed measuring instrument used for the detection of rotational speed standard devices.

Background technique

Rotational speed is an important parameter to describe the technical performance of various rotating machinery, and it is the basis of mechanical kinematics measurement. The rotational speed of rotating machinery needs to be measured by means of rotational speed measuring instruments or rotational speed sensors and secondary instruments. Among them, the rotating speed measuring instrument belonging to the working tool is widely used by various industries in the society. For example, the speed measuring instrument is one of the necessary instruments in the machinery industry. It is used to measure the speed or frequency of the motor. It is often used in motors, electric fans, papermaking, plastics, chemical fibers, washing machines, automobiles, airplanes, ships and other manufacturing industries. It involves all aspects of the national economy. field. Various types of speed measuring instruments and speed sensors must be verified or calibrated by speed standard devices.

In the field of metrology and measurement, in order to ensure the uniformity of the value or the accuracy and reliability of the measurement, it is an important task to detect the measurement range and measurement error of the speed standard device. In China, the detection of standard speed devices mainly uses speed measuring instruments.

With the rapid development of aerospace, medical and health, and some high-tech industries in recent years, the existing speed measuring instruments have become increasingly unable to meet the low requirements of national defense construction and people's livelihood security in terms of measurement range, measurement reliability, and measurement efficiency. RPM metering requirements.

In the prior art, the speed measuring instrument usually uses a photoelectric sensor or Hall sensor to perform single-channel measurement, and the lower limit of the speed it can achieve is 1r/min, which cannot meet the lower limit of 0.1r/min of the speed standard device. . In addition, this speed measuring instrument takes a long time to measure a low speed, has low efficiency, and has unsatisfactory measurement reliability. In addition, the failure rate of single-channel measurement is high, which is not conducive to popularization and application.

Contents of the invention

The object of the present invention is to propose a non-contact multi-channel synchronous speed measuring instrument, which is realized based on multiple measurement channels composed of multiple signal conditioning modules and multiple non-contact speed sensors, and can complete accurate measurement of standard speed devices. Reliable speed detection calibration.

The present invention adopts the following solutions: a non-contact multi-channel synchronous speed measuring instrument, the measuring instrument includes: a power supply unit; a control unit electrically connected to the power supply unit; a measurement unit including a channel selection module, a signal conditioning module and For a non-contact rotational speed sensor, the channel selection module is electrically connected to the control unit, electrically connected to the power supply unit, and electrically connected to the signal conditioning module, and the signal conditioning module is electrically connected to the non-contact rotational speed sensor connection; and an input-output unit, communicatively connected with the control unit, and electrically connected with the power supply unit.

Preferably, in the non-contact multi-channel synchronous speed measuring instrument, the non-contact speed sensor may be a laser speed sensor or a magnetoelectric speed sensor.

Preferably, in the non-contact multi-channel synchronous speed measuring instrument, the signal conditioning module and the non-contact speed sensor can form a measurement channel.

Preferably, in the non-contact multi-channel synchronous speed measuring instrument, the channel selection module can select multiple measurement channels.

Preferably, in the non-contact multi-channel synchronous rotational speed measuring instrument, the rotational speed measurement range is 0.01-120000 r/min.

Preferably, in the non-contact multi-channel synchronous speed measuring instrument, the input and output unit may include a user interaction interface.

Preferably, in the non-contact multi-channel synchronous speed measuring instrument, the user interaction interface may be a touch display screen.

The beneficial effect of the present invention is that it is realized by adopting multiple measurement channels composed of multiple signal conditioning modules and multiple non-contact rotational speed sensors, and can complete accurate and reliable rotational speed detection and calibration of standard rotational speed devices. The measuring instrument has wide measuring range, low lower limit of rotating speed, reliable measuring result, high measuring efficiency, flexible and convenient operation, and low price.

Description of drawings

The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of the disclosed exemplary embodiments with reference to the accompanying drawings, wherein, in the exemplary embodiments of the present invention, the same reference numerals Usually represent the same part;

Fig. 1 shows a schematic diagram of a non-contact multi-channel synchronous speed measuring instrument according to an embodiment of the present invention;

Fig. 2 shows a partial schematic diagram of a measuring unit of a non-contact multi-channel synchronous speed measuring instrument according to an embodiment of the present invention.

Detailed ways

Preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although preferred embodiments of the invention are shown in the drawings, it should be understood that the invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

Fig. 1 shows a schematic diagram of a non-contact multi-channel synchronous speed measuring instrument according to an embodiment of the present invention, and Fig. 2 shows a measurement unit of a non-contact multi-channel synchronous speed measuring instrument according to an embodiment of the present invention Partial schematic. As shown in FIG. 1 , the non-contact multi-channel synchronous speed measuring instrument may include: a control unit 100 , a measurement unit 200 , an input and output unit 300 and a power supply unit 400 . The control unit 100 may include a channel selection module 201, a signal conditioning module 202, and a non-contact rotational speed sensor 203, wherein the channel selection module 201 is electrically connected to the control unit 100, is electrically connected to the power supply unit 400, and is electrically connected to the signal conditioning module 202 , the signal conditioning module 202 is electrically connected to the non-contact rotational speed sensor 203 . The input/output unit 300 is connected in communication with the control unit 100 and electrically connected with the power supply unit 400 .

The user inputs the nominal value of the rotational speed to be measured through the input and output unit 300 , adjusts the position of the non-contact rotational speed sensor 203 to ensure effective measurement, and the signal conditioning module 202 outputs the measured rotational speed signal to the channel selection module 201 . The control unit 100 receives the rotational speed signals of each measurement channel output by the channel selection module 201 and performs corresponding processing and calculation.

The invention is realized based on a plurality of measurement channels formed by a plurality of signal conditioning modules and a plurality of non-contact rotation speed sensors, and can complete accurate and reliable detection and calibration of a standard rotation speed device.

In one example, the non-contact rotational speed sensor 203 may be a laser rotational speed sensor or a magnetoelectric rotational speed sensor. Laser speed sensor or magnetoelectric speed sensor has accurate measurement and fast response, which can realize reliable speed measurement.

In an example, the signal conditioning module 202 and the non-contact rotational speed sensor 203 may constitute a measurement channel, and the channel selection module 201 selects multiple measurement channels, as shown in FIG. 2 .

In an example, the measurement range of the rotational speed of the measurement channel formed by the signal conditioning module 202 and the non-contact rotational speed sensor 203 may be 0.01-120000 r/min.

In one example, the input and output unit 300 may include a user interaction interface. The user can input the set rotational speed through the user interface.

In one example, the user interface can be a touch display.

Application example

In order to facilitate the understanding of the solutions and effects of the embodiments of the present invention, two specific application examples are given below. Those skilled in the art will understand that this example is only for the purpose of facilitating the understanding of the present invention, and any specific details thereof are not intended to limit the present invention in any way.

Application Example 1: Use the non-contact two-channel synchronous speed measuring instrument of the present invention to detect the speed standard device.

The non-contact two-channel synchronous speed measuring instrument selects two laser sensors as the speed sensor, and the emitted measuring beam is irradiated on the output shaft of the speed standard device, and the output shaft is pasted with bead glass reflective strips. To measure the output speed of the speed standard device, through the non-contact two-channel synchronous speed measuring instrument, in the speed range of 10 ~ 100000r/min, the measurement range and measurement uncertainty of the speed standard device are measured according to the series 1, 3 and 5 detection. The measurement results show that the measurement uncertainty of the rotational speed of the present invention is 1×10 ^-5 within the rotational speed range of 10 to 100,000 r/min.

Application example 2: use the non-contact four-channel synchronous speed measuring instrument of the present invention to detect the low speed standard device.

The non-contact four-channel synchronous speed measuring instrument selects four magnetoelectric sensors as the speed sensor, and a standard gear plate is installed on the output shaft of the low speed standard device. To measure the output speed of the speed standard device, through the non-contact four-channel synchronous speed measuring instrument, in the speed range of 0.01 ~ 100r/min, the measurement range and measurement uncertainty of the speed standard device are measured according to 1, 3, 5 series detection. The measurement results show that the measurement uncertainty of the rotational speed of the present invention is 5×10 ^-6 within the rotational speed range of 0.01 to 100 r/min.

Having described various embodiments of the present invention, the foregoing description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and alterations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used in the present invention is chosen to best explain the principle of each embodiment, practical application or improvement of technology in the market, or to enable other ordinary skilled in the art to understand each embodiment disclosed herein.

Claims (7)

1. a kind of contactless multi-channel synchronous tachometer of measuring, which is characterized in that including：

Power supply unit；

Control unit is electrically connected with the power supply unit；

Measuring unit, including channel selecting module, signal conditioning module and non-contact type tachometric sensor, the channel selecting mould Block is electrically connected with the control unit, and is electrically connected with the power supply unit, is electrically connected with the signal conditioning module, the signal Conditioning module is electrically connected with the non-contact type tachometric sensor；And

Input-output unit is communicated to connect with described control unit, is electrically connected with the power supply unit.

2. contactless multi-channel synchronous tachometer of measuring according to claim 1, which is characterized in that described contactless Speed probe is laser speed probe or magnetoelectric tachometric transducer.

3. contactless multi-channel synchronous tachometer of measuring according to claim 1, which is characterized in that the signal condition Module and non-contact type tachometric sensor constitute a Measurement channel.

4. contactless multi-channel synchronous tachometer of measuring according to claim 1, which is characterized in that the channel selecting Module selects multiple Measurement channels.

5. contactless multi-channel synchronous tachometer of measuring according to claim 1, which is characterized in that the tachometric survey Range is 0.01~120000r/min.

6. contactless multi-channel synchronous tachometer of measuring according to claim 1, which is characterized in that the input and output Unit includes user interface.

7. contactless multi-channel synchronous tachometer of measuring according to claim 6, which is characterized in that user's interaction Interface is touch display screen.