CN202204461U

CN202204461U - Device for measuring small displacement by utilizing single chip microcomputer

Info

Publication number: CN202204461U
Application number: CN2011202602888U
Authority: CN
Inventors: 杨亮
Original assignee: XIANGTAN HUAYU TECHNOLOGY Co Ltd
Current assignee: XIANGTAN HUAYU TECHNOLOGY Co Ltd
Priority date: 2011-07-21
Filing date: 2011-07-21
Publication date: 2012-04-25
Anticipated expiration: 2021-07-21

Abstract

The utility model discloses a device for measuring small displacement by utilizing a single chip microcomputer. The device is characterized in that an inductance sensor is adopted to be connected with a micrometer sensor by multi-path simulation selector switches symmetrically designed, and a voltage signal corresponding to the displacement amount is obtained, is conveyed to a single chip microcomputer system to be processed after being processed by a signal amplifier, and is displayed by a display device; and data can be transmitted to an upper machine by a serial port so as to store the mass data and conduct analysis and processing with specific requirements. The device has the functions of automatic measurement, display and communication, also has the advantages of being less in temperature drift, good in stability, high in accuracy and convenient to maintain, and is applicable to measuring the small displacement amount.

Description

The device that utilizes single-chip microcomputer that micro-displacement is measured

Affiliated technical field

The utility model relates to a kind of to adopt the metering outfit that by electric or magnetic means is a characteristic.

Background technology

At present for the displacement measurement under quasistatic (i.e. slow dynamic process of the friendshipization) condition; Conventional method is to adopt various mechanical type comparators; Electrodynamic type current vortex dial gauge; Inductance type micrometer etc. in the multichannel displacement measurement, reflect that then their automaticity is not high, the error of indication is big, weak points such as inconvenient operation.

The utility model content

The purpose of the utility model provides a kind of device that utilizes single-chip microcomputer that micro-displacement is measured.

The technical scheme of the utility model is; A kind of device that utilizes single-chip microcomputer that micro-displacement is measured; Three tap inductance sensors are connected with dial gauge through the multi-channel analog change-over switch, and the voltage signal of output is through amplifier, A/D converter, interface chip; Be connected to by up-computer, serial port; Single-chip microcomputer, latch, memory, port number are provided with the SCM system that switch is formed, to input signal gather, filtering, conversion and calculating, send display to show through driving circuit 1, driving circuit 2; Described multi-channel analog change-over switch two chips identical by characteristic and symmetric design are formed; The sine power supply that inductance sensor is encouraged that switches respectively that oscillator sends in the dial gauge; The output signal line of inductance sensor is connected with phase-sensitive detection circuit with amplification in the dial gauge, and its signal gets into the amplifier of being made up of operational amplifier, resistance R 1, R2, R3, W and capacitor C 1, C2 and amplifies and filtering.

The utlity model has following technique effect, (1) this survey monitor can independently use, and has the precision height, count many, a digital displayization.(2) adopt modular design, versatility is good, exploitation, easy to maintenance.(3) suppress temperature with measures such as the circuit design of symmetrical expression and software compensations and float, good stability, applied widely.(4) have serial line interface, subsequent processes is convenient, fully to enjoy the abundant software and hardware resources of up-computer.(5) circuit structure is simple, cost is low.

Description of drawings

Fig. 1 is the circuit block diagram of the utility model.

Fig. 2 the utility model three tap inductance sensors, multi-channel analog change-over switch, dial gauge, amplifier annexation synoptic diagram.

Embodiment embodiment

Like Fig. 1, shown in Figure 2; A kind of device that utilizes single-chip microcomputer that micro-displacement is measured; Three tap inductance sensors are connected with dial gauge through the multi-channel analog change-over switch, and the voltage signal of output is through amplifier, A/D converter, interface chip; Be connected to by up-computer, serial port; Single-chip microcomputer, latch, memory, port number are provided with the SCM system that switch is formed, to input signal gather, filtering, conversion and calculating, send display to show through driving circuit 1, driving circuit 2; Described multi-channel analog change-over switch two chips identical by characteristic and symmetric design are formed; The sine power supply that inductance sensor is encouraged that switches respectively that oscillator sends in the dial gauge; The output signal line of inductance sensor is connected with phase-sensitive detection circuit with amplification in the dial gauge, and its signal gets into the amplifier of being made up of operational amplifier, resistance R 1, R2, R3, W and capacitor C 1, C2 and amplifies and filtering.

The measuring method of this device:

Because dial gauge can be the feedback loop output signal that three tap inductance sensors provide pumping signal and handle alternation, and d. c. voltage signal exportable and that displacement is linearly proportional, so through between multiple sensor and dial gauge, adding the multi-channel analog change-over switch; Simultaneously to the direct current signal of dial gauge output through amplifying, after mould/number conversion, receiving by SCM system and to handle, that has realized the multichannel displacement patrols survey automatically. action in the time of through two change-over switches; Sensor of each connection is connected with the signal of dial gauge; Survey next road after having surveyed again, the port number of need surveying is provided with switch by port number and selects, when all passages all test-all over after; Shift value circulation with each road shows output again; The test interval that can guarantee each point like this makes the test duration have consistance for minimum, is necessary in this test under the quasistatic condition; Certainly the change through software also can every survey a bit promptly shows any value. can data regularly be sent to up-computer in case of necessity.

Its measuring process:

(1) in the quasistatic condition, the heat distortion amount test like lathe arranges each sensor earlier; Under the state that dial gauge and this machine are all worked, the initial position of adjustment sensor approaches zero to displayed value; Fixation of sensor by reset key, is write down the initial value of each point then.

(2) instrument is provided with the determined channel cycle of switch by port number and detects and show, displayed value and initial value poor is exactly the change in displacement value.

When (3) single channel is measured,, the passage religion all places downward position as long as being provided with switch.

(4) the various measurements under static bar companion are like the measurement of the physical dimension of product or the margin of error etc.; Then on standard, adjust earlier the initial value of each sensor, put measured piece again, displayed value and initial value poor is exactly the difference in size of measured value and standard.

Claims

1. device that utilizes single-chip microcomputer that micro-displacement is measured; It is characterized in that: three tap inductance sensors; Be connected with dial gauge through the multi-channel analog change-over switch; The voltage signal of output is connected to by up-computer, serial port through amplifier, A/D converter, interface chip, and single-chip microcomputer, latch, memory, port number are provided with the SCM system that switch is formed; To input signal gather, filtering, conversion and calculating, send display to show through driving circuit 1, driving circuit 2; Described multi-channel analog change-over switch two chips identical by characteristic and symmetric design are formed; The sine power supply that inductance sensor is encouraged that switches respectively that oscillator sends in the dial gauge; The output signal line of inductance sensor is connected with phase-sensitive detection circuit with amplification in the dial gauge, and its signal gets into the amplifier of being made up of operational amplifier, resistance R 1, R2, R3, W and capacitor C 1, C2 and amplifies and filtering.