CN205665261U

CN205665261U - Motor speed measuring device based on hall sensor

Info

Publication number: CN205665261U
Application number: CN201620238223.6U
Authority: CN
Inventors: 谭韬
Original assignee: Guizhou Education University
Current assignee: Guizhou Education University
Priority date: 2016-03-25
Filing date: 2016-03-25
Publication date: 2016-10-26
Anticipated expiration: 2026-03-25

Abstract

The utility model discloses a motor speed measuring device based on hall sensor, including hall sensor, hall sensor produces rotatory pulse signal and transmits the hardware switching circuit for 8253 singlechips and T method and MT method through optoelectronic coupler, the hardware switching circuit passes through 8253 single chip microcomputer control, the hardware switching circuit is under the rotatory pulse combined action that the sampling pulse and the hall sensor of the production of 8253 singlechips produced, the production is arranged in controlling the gate signal of 8253 singlechip counters, adopt the MT method to test the speed when high -speed in the assurance, adopt the T method to test the speed during low -speed, 8253 the singlechip is connected with one 8051 singlechip, 8051 the singlechip is cut the circuit with hardware and is linked to each other, the combination of two kinds of methods of testing the speed of T method and MT method has been adopted, avoided in the MT method low -speed mistake survey be 0 or the real -time less than the problem, guarantee in the follow method that the wide region accuracy tests the speed, the defect that software switches the real time control variation that leads to greatly because of software work load has been overcome.

Description

A kind of motor speed measuring device based on Hall element

Technical field

This utility model relates to motor speed measuring technical field, is specifically related to a kind of motor speed measuring based on Hall element dress Put.

Background technology

Along with the development of China's modern agriculture facility, the requirement that becomes more meticulous operation is more and more higher, in the urgent need to sending out energetically Exhibition greenhouse automatic walking robot improves production efficiency and ensures the safety of the products of labor.In view of Operation road in greenhouse Environmental factors complicated and changeable, therefore Greenhouse Robot typically uses tricycle chassis structure, allows robot turn to and motion has more High precision, makes control reach a higher level.Realize the accurate control to Greenhouse Robot, the motor of running gear Speed measuring module is a critically important link.

The highest reaction of resolution of motor speed measuring module is the fastest, and the control to motor is the best.Due to hall sensing utensil Have that size is little, light weight, the spy such as contactless, peripheral circuit simple, frequency response width, dynamic property are good, length in service life, debugging are convenient Point, can make various sensor with it, is widely used in displacement measurement, measurement of dip angle, pressure measxurement, rotating speed or revolution speed measuring And the aspect such as counting.

But in present society, in high ferro, today that subway is flourish, for ensureing safe train operation, to train Operation control have higher requirement.Want the safe train controlling high-speed cruising, it is necessary to detection train fortune accurately The real-time speed of row.

Utility model content

For problem above, this utility model provides a kind of motor speed measuring device based on Hall element, have employed T Method and the combination of two kinds of speed-measuring methods of M/T method, it is to avoid in M/T method, select the survey by mistake of the improper low speed caused to be 0 because measuring time T Or the problem of poor real, from method, ensureing that wide scope accurately tests the speed, the switching of speed-measuring method have employed hardware exchange, overcomes The defect controlling in real time to be deteriorated that software exchange causes because software work amount is big, uses Hall element to produce and rotates arteries and veins Punching, has low cost, high-performance, the advantages such as capacity of resisting disturbance is strong, can effectively solve the problem in background technology.

To achieve these goals, the technical solution adopted in the utility model is as follows: a kind of electricity based on Hall element Machine speed measuring device, including Hall element, described Hall element produces rotational pulse signal and is transferred to through photoelectrical coupler The hardware exchange circuit of 8253 single-chip microcomputers and T method and M/T method, described hardware exchange circuit passes through 8253 Single-chip Controlling, institute State under sampling pulse that hardware exchange circuit produces at 8253 single-chip microcomputers and the rotary pulsed common effect that Hall element produces, Produce the gate-control signal for controlling 8253 single-chip microcomputer Counters, it is ensured that use M/T method to test the speed during high speed, use during low speed T method tests the speed, and described 8253 single-chip microcomputers connect has 8051 single-chip microcomputers, described 8051 single-chip microcomputers to cut circuit with hardware and be connected.

As a kind of optimal technical scheme of the present utility model, described 8051 single-chip microcomputers connect LED display module or number Code pipe display module.

As a kind of optimal technical scheme of the present utility model, described 8253 single-chip microcomputers connect memory module.

The beneficial effects of the utility model:

This utility model have employed T method and the combination of two kinds of speed-measuring methods of M/T method, it is to avoid because measuring time T in M/T method The problem selecting the survey by mistake of the improper low speed caused to be 0 or poor real, ensures that from method wide scope accurately tests the speed, speed-measuring method Switching have employed hardware exchange, overcome the defect controlling in real time to be deteriorated that software exchange causes because software work amount is big, Use Hall element to produce rotary pulsed, there is low cost, high-performance, the advantages such as capacity of resisting disturbance is strong.

Accompanying drawing explanation

Fig. 1 is this utility model overall structure schematic diagram.

Figure is numbered: 1-Hall element；2-photoelectrical coupler；3-8253 single-chip microcomputer；4-hardware exchange circuit；5- 8051 single-chip microcomputers；6-LED display module；7-memory module.

Detailed description of the invention

In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing and enforcement Example, is further elaborated to this utility model.Should be appreciated that specific embodiment described herein is only in order to explain This utility model, is not used to limit this utility model.

Embodiment:

As it is shown in figure 1, a kind of motor speed measuring device based on Hall element, including Hall element 1, described Hall Sensor 1 produces the hardware that rotational pulse signal is transferred to 8253 single-chip microcomputer 3 and T methods and M/T method through photoelectrical coupler 2 and cuts Changing circuit 4, described hardware exchange circuit 4 is controlled by 8253 single-chip microcomputers 3, and described hardware exchange circuit 4 produces at 8253 single-chip microcomputers 3 Under the rotary pulsed common effect that raw sampling pulse and Hall element 1 produce, produce and fall into a trap for control 8253 single-chip microcomputers 3 The gate-control signal of number device, it is ensured that using M/T method to test the speed during high speed, use T method to test the speed during low speed, described 8253 single-chip microcomputers 3 are even Being connected to 8051 single-chip microcomputers 5, described 8051 single-chip microcomputers 5 are cut circuit 4 and are connected with hardware.

On above-described embodiment preferably, described 8051 single-chip microcomputers 5 connect LED display module 6.

On above-described embodiment preferably, described 8253 single-chip microcomputers 3 connect memory module 7.

Concrete, in this utility model, the relative theory of T method and M/T method is as follows:

T method i.e. measuring period method, T method be measure adjacent two rotary pulsed between time interval the most rotary pulsed week Phase, calculate through T method and indirectly record speed.Generally way is to known high frequency time base pulse in a rotary pulsed cycle Counting, then can be calculated the rotary speed of measurand by formula；It is right within a rotary pulsed cycle that T method tests the speed Known high frequency time base step-by-step counting, the most also can produce ± the error of 1 high frequency time base pulse.Test the speed by T method, Rotating speed is the highest, and measurement error is the biggest, and therefore, T method is applicable to low-speed detection；

M method i.e. measured frequency method, M method be regulation time T in detect rotary pulsed number M1 indirectly measure turn Speed；The detection time of this counting method is definite value T, owing to detecting the randomness of beginning and ending time, can cause producing under extreme case ± 1 Individual rotary pulsed error, therefore, in the case of higher at rotating speed or rotation generation in a week rotary pulsed number is more, measures Precision is higher, therefore M method is applicable to detect the measurand of high speed rotating；

M/T method i.e., in detection time T, had both been measured rotary pulsed number M1, had been measured again known high frequency time base pulse Number M, then calculates the rotating speed of measurand by formula；M/T method is M method and the combination of T method, during testing the speed due to Simultaneously to rotary pulsed and two kinds of step-by-step countings of high frequency time base pulse, as long as " synchronism " processes proper, no matter at a high speed or Low-speed detection has higher accuracy of detection, but this method exists the rational selection of a detection time T, if during detection Between T the least, it may appear that being 0 by speed by mistake survey during low speed, if T is too big, then can not quickly measure speed, impact is tested the speed Real-time.

Based on above-mentioned, this utility model have employed T method and the combination of two kinds of speed-measuring methods of M/T method, it is to avoid in M/T method because of The problem that measurement time T selects the survey by mistake of the improper low speed caused to be 0 or poor real, ensures that from method wide scope is accurately surveyed Speed, the switching of speed-measuring method have employed hardware exchange, overcomes the real-time control that software exchange causes because software work amount is big The defect being deteriorated, uses Hall element to produce rotary pulsed, has low cost, high-performance, the advantages such as capacity of resisting disturbance is strong.

The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all at this Any amendment, equivalent and the improvement etc. made within the spirit of utility model and principle, should be included in this utility model Protection domain within.

Claims

1. a motor speed measuring device based on Hall element, it is characterised in that include Hall element (1), described Hall Sensor (1) produces rotational pulse signal and is transferred to 8253 single-chip microcomputers (3) and T method and M/T method through photoelectrical coupler (2) Hardware exchange circuit (4), described hardware exchange circuit (4) is controlled by 8253 single-chip microcomputers (3), described hardware exchange circuit (4) Under the rotary pulsed common effect that the sampling pulse produced at 8253 single-chip microcomputers (3) and Hall element (1) produce, generation is used for Control the gate-control signal of 8253 single-chip microcomputers (3) Counter, it is ensured that during high speed, use M/T method to test the speed, during low speed, use T method to survey Speed, described 8253 single-chip microcomputers (3) connect 8051 single-chip microcomputer (5), and circuit (4) cut by described 8051 single-chip microcomputers (5) and hardware It is connected.

A kind of motor speed measuring device based on Hall element the most according to claim 1, it is characterised in that: described 8051 Single-chip microcomputer (5) connects LED display module (6).

A kind of motor speed measuring device based on Hall element the most according to claim 1, it is characterised in that: described 8253 Single-chip microcomputer (3) connects memory module (7).