CN208269821U - A kind of magnetic displacement measuring instrument of all aluminium alloy shell - Google Patents

Abstract

The utility model is a kind of magnetic displacement measuring instrument of all aluminium alloy shell, including Hall sensor, numeral method area, RS485 communication module, signal amplifier, MCU, switching signal output module, key control module and power management module.The beneficial effects of the utility model are: entire new device realization controls measurement length by sensor displacement distance.This Novel facial mask is by dark-grey, and middle ash and light gray allotment are composed, and color is modish, and operation button has simple icon, more easy-to-understand, and more humane, four plastic cement fasteners are elastic extruding type assembly, and it is convenient to install and dismantle.

Description

A kind of magnetic displacement measuring instrument of all aluminium alloy shell

Technical field

The utility model relates to field of measuring technique, the magnetic displacement measuring instrument of specifically a kind of all aluminium alloy shell.

Background technique

Magnetic displacement measuring instrument is a kind of device that length is measured by Hall sensor shift length, is contactless The measuring technique of measurement, its advantages are: non-contact measurement, high contamination resistance, resistant to dust, wear-resistant, impact resistance, antivibration Dynamic, anti-magnetic interference, service life is extremely long, is suitable for working under water, oil, the industrial environments such as dust, to be widely used in gold Belong to process equipment, building material machinery, the fields such as woodworking machinery.Magnetic Sensor it is small in size, structure is simple, be easy installation, in material In the actual use of processing, displacement measuring device is mounted on numerically-controlled machine tool, measures the length of material, controls the position of processing machine Distance is moved, due to the uncertainty of material processing quantity, also needs manually to be counted after processing every time, record measurement or processing Material quantity.The data of unexpected power-off in measurement process, displacement will lose.The intelligent behaviour of magnetic displacement measuring instrument Make.

Utility model content

The purpose of this utility model is to provide a kind of magnetic displacement measuring instruments of all aluminium alloy shell, to solve above-mentioned back The problem of being proposed in scape technology.

To achieve the above object, the utility model provides the following technical solutions:

A kind of magnetic displacement measuring instrument of all aluminium alloy shell, including aluminum alloy casing, facial mask, acrylic minor flaps, master Plate PCB, LCD display, assembling connecting piece, cableties, battery case and plastic cement fastener, the aluminum alloy casing is by aluminum deck and aluminium Middle shell and aluminium rear cover are connected with each other, and assembling connecting piece includes M3 copper post, CM3 screw, PM3 screw and PM2.5 screw, battery Box is made of box body and lid, and the small cover of acrylic is fixed on aluminum deck, M3 copper post is logical in aluminum deck by facial mask stickup It crosses screw hole directly to lock on aluminum deck, mainboard PCB is fixed in copper post by PM3 screw, and sensor wire passes through aluminium rear cover Hole covers after being clamped in aluminium by cableties, and battery case is covered after aluminium by PM2.5 screw locking, aluminium rear cover by CM3 screw locking in In aluminium on shell, plastic cement fastener is pressed into aluminium in the aperture of shell using itself rubber column gel column to be fixed in aluminium on shell.

Further technical solution as the utility model: the mainboard PCB include Hall sensor, the viewing area LCD, RS485 communication module, signal amplifier, MCU, switching signal output module, key control module and power management module, it is special Sign is, the Hall sensor acquisition displacement signal is simultaneously transferred to signal amplifier, signal amplifier to the signal of input into After row amplifier output to MCU, MCU be also respectively connected with numeral method area, RS485 communication module, switching signal output module, Key control module and power management module.

Further technical solution as the utility model: the model MSP430F437 of the MCU.

Further technical solution as the utility model: the model MCP6042 of the signal amplifier or MCP6044。

Compared with prior art, the utility model has the beneficial effects that (1) high-resolution LCD shows numerical value, high-resolution point Battle array screen display multi-functional operation menu；(2) display resolution 0.01mm/0.05mm/0.1mm/1mm；(3) length, angle measurement Mode (optional)；(4) programmable coefficients ratio；(5) datum mark recoverable；(6) absolute measurement mode/increment measurement mode；(7) public System/English system conversion；(8) low battery alerts；(9) battery life about 2 years；(10) spacing Auto-Sensing error is adjusted；(11) in real time certainly I diagnoses；(12) non-contact measurement, no back clearance problem；(13) high contamination resistance；(14) antistatic intensity is high；(15) it operates Simply.Entire new device realization controls measurement length by sensor displacement distance.This Novel facial mask by dark-grey, it is middle ash and Light gray allotment is composed, and color is modish, and operation button has simple icon, and more easy-to-understand, more humane, four plastic cement are tight Firmware is elastic extruding type assembly, and it is convenient to install and dismantle.

Detailed description of the invention

Fig. 1 is the Structure explosion diagram of the utility model；

Fig. 2 is the system block diagram of main PCB plate.

Specific embodiment

Below by the technical scheme in the utility model embodiment is clearly and completely described, it is clear that described Embodiment is only the utility model a part of the embodiment, instead of all the embodiments.Based on the implementation in the utility model Example, every other embodiment obtained by those of ordinary skill in the art without making creative efforts belong to The range of the utility model protection.

Refering to fig. 1-2；In the utility model embodiment, a kind of magnetic displacement measuring instrument of all aluminium alloy shell, including aluminium Alloy shell, facial mask 1, acrylic minor flaps 2, mainboard PCB9, LCD display 6, assembling connecting piece, cableties 14,15 and of battery case Plastic cement fastener 12, the aluminum alloy casing are connected with each other by shell 11 in aluminum deck and aluminium and aluminium rear cover 13, assembly connection Part includes M3 copper post 5, CM3 screw 3, PM3 screw 10 and PM2.5 screw 17, and battery case is made of box body 15 and lid 16, acrylic The lid of facet 2 is fixed on aluminum deck 4, M3 copper post 5 is directly lock by screw hole in aluminum deck 4 by the stickup of facial mask 1 On aluminum deck 4, mainboard PCB9 is fixed in copper post 5 by PM3 screw 10, and sensor wire passes through 13 hole of aluminium rear cover and blocked by cableties 14 Tightly on aluminium rear cover 13, battery case is lock on aluminium rear cover 13 by PM2.5 screw 17, and aluminium rear cover 13 lock onto aluminium by CM3 screw 3 On middle shell 11, plastic cement fastener 12 is pressed into aluminium in the aperture of shell 11 using itself rubber column gel column to be fixed in aluminium on shell 11.

Mainboard PCB includes Hall sensor, the viewing area LCD, signal amplifier, MCU, key control module and power management Module, which is characterized in that the Hall sensor acquires displacement signal and is transferred to signal amplifier, and signal amplifier is to input Signal amplify after device output and be also respectively connected with numeral method area, key control module and power management to MCU, MCU Module.

The model MSP430F437 of MCU.The model MCP6042 or MCP6044 of signal amplifier.

The working principle of the utility model is: Hall sensor: according to Hall effect principle, Hall voltage is with magnetic field strength Variation and change, magnetic field is stronger, and voltage is higher, and magnetic field is weaker, and voltage is lower, Hall voltage value very little, usually only several Millivolt, but amplify through the amplifier in integrated circuit, the voltage amplification can be made to being enough to export stronger signal.If making Hall Integrated circuit plays sensing, needs to change magnetic induction intensity with machinery method.Be shown in the following figure " 1 " refer in have Hall The sensor of element, (2) are that (base ruler is the steel band being magnetized uniformly to magnetic railings ruler.The pole S and N uniform intervals are arranged on steel band), When in the air gap that sensor is between magnetic grid and Hall integrated circuit, work as movable sensor, integration slice, Hall are deviateed in magnetic field Loss of voltage.In this way, the variation of the output voltage of Hall integrated circuit, can represent sensor in a certain position of magnetic grid.

Signal amplifier:

Since the magnetic field strength of magnetic railings ruler is weaker, the signal of Hall sensor output is also faint electric signal, and With very big common-mode voltage (including interference voltage), generally this signal is needed using measuring amplifier, that is, instrument Device amplifier, instrument amplifier are a kind of precision differential voltage amplifiers, it is derived from operational amplifier, and is better than operation amplifier Device.Instrument amplifier is integrated in key element inside amplifier, and unique structure makes it have high cmrr, height defeated The features such as entering impedance, low noise, low linearity error, flexible and easy to use low offset drift gain setting, adopts it in data Collection, sensor signal amplification, high speed signal adjusting, Medical Instruments and high end audio equipment etc. gain great popularity.Instrument amplification Device is a kind of closed loop gain component with Differential Input and opposite reference end Single-end output, has Differential Input and opposite reference The Single-end output at end.The closed loop gain that operational amplifier is a difference in that with operational amplifier is by inverting input terminal and output end Between the non-essential resistance that connects determine that and instrument amplifier then uses the internal feedback resistor network being isolated with input terminal.Instrument 2 differential input ends of amplifier apply input signal, and gain can be preset by inside, can also pass through pin inner portions by user It is arranged or the external gain resistor by being isolated with input signal is preset.The typical structure of instrument amplifier circuit such as Fig. 1 institute Show.It is mainly made of two-stage differential amplifier circuit.Wherein, amplifier A1, A2 are with phase difference input mode, and homophase input can To increase substantially the input impedance of circuit, reduce decaying of the circuit to faint input signal；Differential Input can make circuit only Difference mode signal is amplified, and only plays Following effect to common mode input signal, so that being sent to the difference mode signal and common-mode signal of rear class The ratio between amplitude (i.e. common-mode rejection ratio CMRR) be improved.In this way in the differential amplification electricity formed using amplifier A3 as core component Lu Zhong can obviously reduce in the case where CMRR requires constant situation to resistance R3 and R4, the Accuracy Matching requirement of Rf and R5, to make Instrument amplifier circuit has better common mode inhibition capacity than simple differential amplifier circuit.In R1=R2, R3=R4, Rf= Under conditions of R5, the gain of Fig. 1 circuit are as follows: G=(1+2R1/Rg) Rf/R3.By formula as it can be seen that the adjusting of circuit gain can lead to The realization of change Rg resistance value is crossed, adjusting RG can change symmetry of the gain without influencing circuit.Wherein A1, A2 are two performances one The general integrated transporting discharging for causing (referring mainly to input impedance, common-mode rejection ratio and open-loop gain), works in same phase amplification mode, constitutes The differential amplification input stage of balanced, symmetrical, A3 works in differential amplification mode, for further suppressing the common-mode signal of A1, A2, And it is connected into the needs that Single-end output mode adapts to ground connection load.

The viewing area LCD:

Its imaging principle of LCD is placed in liquid crystal material between the transparent conducting glass that two panels attaches optical axis vertical polarizing plate, Liquid crystal molecule can be sequentially rotatably arranged according to the fine groove direction of alignment film, if electric field is not formed, light can be smoothly from polarisation Plate is injected, and rotates its direction of travel according to liquid crystal molecule, is then projected from another side.If after the energization of two panels electro-conductive glass, It will cause electric field between two sheet glass, and then influence the arrangement of liquid crystal molecule therebetween, reverse its molecule stick, light just can not It penetrates, and then covers light source.The phenomenon that comparison of brightness obtained by this way, it is called torsional mode nematic field-effect, abbreviation TNFE (TwistedNematicFieldEffect).The liquid crystal display used in electronic product is nearly all with torsional mode nematic Made by field-effect principle.The LCD uses HTNLCD (high twist nematic phase is shown), has compared TNLCD, HTN can be applied to Higher driving number, usually 1/8~1/32 tunnel.Applied to onboard instruments, game machine etc..

Single-chip microcontroller MSP430F437

MSP430F437 is a super low-power consumption microcontroller, is to realize to extend battery life in portable type measuring application Optimal selection.The device has powerful 16 RISCCPU, 16 bit registers and constant generator, in order to obtain Obtain maximum code efficiency.This digital controlled oscillator (DCO) can be realized from low-power mode in 3.5 μ s (representative value) and be waken up to activation Mode.

MSP430F437 is the configuration of microcontroller, this configuration tool is there are three 16 bit timing devices, one high-performance 12 Modulus (A/D) converter, up to four common serial communication interfaces (USCI), hardware multiplier, DMA, with warning function Real-time clock module.The typical case of this device includes analog- and digital- sensing system, digital motor control, remote control, perseverance Warm device, digital clock, handheld instrument.

By key control

All function buttons are all made of light-touch switch key-press, because touch-switch, which has the advantages that, utilizes metal spring leaf As the title touch-switch of switch contact, contact resistance is small, good hand touch, there is " ticking " clear and melodious sound, accurate operating force error, The advantage of multi-size etc., electronic equipment and in terms of be widely used such as: video and audio product, number Code product, remote controler, communication product, household electrical appliance, security product, toy, computer product, fitness equipment, medical equipment, money-checking Pen, Laser pen key etc..Service life is long, the number of folding, until damage, elastic slice service life: the multiple silver of ten thousand import elastic slice single sides of 5-7 Service life: greater than 100,000 time stainless steel elastic slice is greater than 500,000 longevity.What the stainless steel elastic slice of product selection import was done touches out It closes, the service life is up to 500,000 times, thin film switch is far superior to, using matrix keyboard principle scanning mode control button function.

Power management description

Cell voltage boosts to 2.7V through AS1323 (low-power consumption, efficient boosting IC).MCU, the power supply of amplifier are provided.

Claims (4)

1. a kind of magnetic displacement measuring instrument of all aluminium alloy shell, including aluminum alloy casing, facial mask, acrylic minor flaps, mainboard PCB, LCD display, assembling connecting piece, cableties, battery case and plastic cement fastener, which is characterized in that the aluminum alloy casing by Shell and aluminium rear cover are connected with each other in aluminum deck and aluminium, assembling connecting piece include M3 copper post, CM3 screw, PM3 screw and PM2.5 screw, battery case are made of box body and lid, and the small cover of acrylic is fixed on aluminium in aluminum deck, through facial mask stickup On panel, M3 copper post is directly lock on aluminum deck by screw hole, and mainboard PCB is fixed in copper post by PM3 screw, sensor Wiring pass through aluminium back cover hole be clamped in aluminium by cableties after cover, battery case is covered after aluminium by PM2.5 screw locking, aluminium rear cover by In aluminium on shell, plastic cement fastener is pressed into aluminium in the aperture of shell using itself rubber column gel column to be fixed in aluminium on shell CM3 screw locking.

2. a kind of magnetic displacement measuring instrument of all aluminium alloy shell according to claim 1, which is characterized in that the mainboard PCB include Hall sensor, numeral method area, RS485 communication module, signal amplifier, MCU, switching signal output module, Key control module and power management module, the Hall sensor acquire displacement signal and are transferred to signal amplifier, signal Amplifier amplifies after device that output to MCU, MCU is also respectively connected with numeral method area, RS485 communicates mould to the signal of input Block, switching signal output module, key control module and power management module.

3. a kind of magnetic displacement measuring instrument of all aluminium alloy shell according to claim 2, which is characterized in that the MCU Model MSP430F5438A-EP.

4. a kind of magnetic displacement measuring instrument of all aluminium alloy shell according to claim 2, which is characterized in that the signal The model MCP6042 or MCP6044 of amplifier.