CN2207566Y - intelligent digtal display pneumatic measuring meter - Google Patents
intelligent digtal display pneumatic measuring meter Download PDFInfo
- Publication number
- CN2207566Y CN2207566Y CN 93223928 CN93223928U CN2207566Y CN 2207566 Y CN2207566 Y CN 2207566Y CN 93223928 CN93223928 CN 93223928 CN 93223928 U CN93223928 U CN 93223928U CN 2207566 Y CN2207566 Y CN 2207566Y
- Authority
- CN
- China
- Prior art keywords
- chip microcomputer
- nozzle
- digital display
- gauge
- model
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Measuring Fluid Pressure (AREA)
Abstract
The utility model relates to an intelligent digital display pneumatic measuring meter. The intelligent digital display pneumatic measuring meter measures signals of changes of air path pressure difference through a sensor, and then the signals of changes of air path pressure difference enter into A/D converter by passing through an amplifier to carry out digital display. Meantime, a single chip computer is connected to accept control instruction and pre-quantity data through a press button, and the data after treatment can be display by digital or be printed out. The utility model has the advantages of wide measuring range, convenient conversion of the multiple rate of nominal measurement, high precision and accurate read value, and realizes the function of displaying and printing according to the truth. The utility model is widely applied to the high-accuracy non-contact type measurement of geometric sense.
Description
The utility model relates to a kind of intelligent digital display air-gauge.
Pneumatic gauging technology in the machine-building is to convert small geometric sense (as size etc.) error the variation of gas parameter (as flow, flow velocity, pressure etc.) to by nozzle-baffle mechanism, significantly show with secondary instrument then, secondary instrument is the float type air-gauge widely at present, its chief component is taper glass and buoy, when gas passes through taper glass, the variation of gas flow makes the height generation respective change of buoy, come indicating positions by the buoy in the taper glass, and on rule, read measurement result.The float type air-gauge that China Zhongyuan Measuring Instrument Plant produces has several specifications such as 2000 times, 5000 times, 10000 times, and the matching standard gauge head can amplify 2000 times, 5000 times, 10000 times with the variation of small geometrical amount.Therefore when measuring different margin tolerance, corresponding selection taper glass is also different, and this has just increased the workload of measuring, and must be equipped with the different taper glass of a cover scale, increased equipment amount, this instrument adopts artificial reading, and error is bigger, because the buoy instability, reading is also relatively more difficult, measure instrument simultaneously and can not export electric signal, can not write down measurement data, therefore can't realize automatic detection.
The purpose of this utility model provides a kind of automatic functions of adjusting such as making things convenient for switching nominal multiplying power as required that has, and reading is accurate, and equipment is simplified again, and has multiparameter, and multinomial purpose shows the intelligent digital display air-gauge of printing function.
A kind of intelligent digital display air-gauge, have the routine measurement head, nozzle and adjustable nozzle, it is characterized in that: it comprises a guidance panel, be positioned at the LCD on the guidance panel, housing and the gas path device that is arranged in housing, pressure transducer, amplifier, 12 A/D chips, single-chip microcomputer, the mini-printer that is connected with single-chip microcomputer, the pressure transducer two ends have bridge power supply, this pressure transducer is arranged between gas path device PaPb, measure the variable signal of gas circuit pressure reduction △ P, again with amplifier, 12 A/D chips, single-chip microcomputer is electrically connected in proper order, and single-chip microcomputer is connected with button and LCD on the guidance panel simultaneously, signal is after amplifier amplifies, enter the A/D conversion again, become digital quantity, carry out numeral by LCD and show, insert single-chip microcomputer simultaneously, by single-chip microcomputer measurement data is handled, single-chip microcomputer is accepted steering order and initialize data by button, and the data after the processing are exported by mini-printer.
The utility model measurement range is wide, can cover specification float type qigong amount instrument in 2000 times, 5000 times, 10000 times three with a kind of product specification, and easy switching, resolution is accurate to 0.0001, measuring accuracy has improved an order of magnitude, owing to adopt digital display and printing equipment can make the value of reading rate of accuracy reached to 100%, avoided the buoy shakiness of former float type gauge, the value of reading difficulty also influences the shortcoming of precision.The utility model can be exported electric signal and can print in good time and realize the purpose of detection automatically.
Fig. 1 is a circuit block diagram of the present utility model;
Fig. 2 is a gas circuit operational diagram of the present utility model.
Below in conjunction with drawings and Examples the utility model is further described.
A kind of intelligent digital display air-gauge, have the routine measurement head, nozzle and adjustable nozzle, it is characterized in that: it comprises a guidance panel, be positioned at the LCD on the guidance panel, housing and the gas path device that is arranged in housing, pressure transducer, amplifier, 12 A/D chips, single-chip microcomputer, the mini-printer that is connected with single-chip microcomputer, the pressure transducer two ends have bridge power supply, this pressure transducer is arranged between gas path device PaPb, measure the variable signal of gas circuit pressure reduction △ P, again with amplifier, 12 A/D chips, single-chip microcomputer is electrically connected in proper order, and single-chip microcomputer is connected with button and LCD on the guidance panel simultaneously, signal is after amplifier amplifies, enter the A/D conversion again, become digital quantity, carry out numeral by LCD and show, insert single-chip microcomputer simultaneously, by single-chip microcomputer measurement data is handled, single-chip microcomputer is accepted steering order and initialize data by button, and the data after the processing are exported by mini-printer.
Through the dehumidifying filtering pressurized air as shown in Figure 2, be by in the rotary valve 1 inlet instrument, pressure through reduction valve 2 is stabilized in 0.06MPa, the utility model has the gauge head of being furnished with former float type air-gauge, and nozzle and adjustable nozzle are by a kind of semiconductor bridge-type output dynamic pressure transducer, (model YY-1 type, measurement range 0--1Kg/cm is for bridge voltage 6V, maximum output voltage 20mV); Measure the signal that gas circuit pressure reduction △ P changes, after passing through differential type chopper-zero-stabilized precision operations amplifier (model ICL7650) amplification then, enter the A/D conversion again, here adopt two chips of ADC--7109+, resolution can reach 1/4096, the A/D conversion chip was seen the Wang Xiu tinkling of pieces of jade etc. " microcomputer A/D, D/A conversion connects R technology and design of data acquisition system " publishing house of Tsing-Hua University 1984, become digital quantity, carrying out numeral shows, insert single-chip microcomputer simultaneously, (the I/O interface is selected 8255 parallel port chips for use), usage belongs to conventional design.In order to guarantee for bridge voltage, to select for use can not meet the demands therefore elite usefulness of general high precision stabilivolt to have the high precision reference source LM399 of constant-heat source, and supply voltage is carried out pre-voltage stabilizing, to guarantee precision.The utility model adopts special differential pressure type pneumoelectric conversion gas circuit, as shown in Figure 2, the pressure voltage stabilizing is at 0.06MPa, gas circuit is divided into three the tunnel: the one tunnel to be needed suitably to select through the aperture that fixed nozzle 5 and fixed nozzle 6 escape into atmospheric gas nozzle 5 and nozzle 6, the pressure Pa that A is ordered among Fig. 2 is near the flex point of pressure characteristic, because near the slope of a curve maximum flex point, the flex point slope of a curve changes minimum, so approximate constant is linear herein best; Another road air-flow is behind nozzle 7, and part escapes into atmosphere through gauge head 3 and the gap that measured piece forms, and part enters atmosphere through adjustable nozzle 9; The Third Road air-flow is overflowed from gauge head 3 or adjustable nozzle 9 behind adjustable nozzle 8.When tested geometric sense has small variation d, be that gauge head and measured surface gap change, the pressure Pb that B is ordered will change, thereby pressure reduction △ P=Pa-Pb is changed, its pressure difference signal is exported by pressure transducer, in order to make the distance of △ P and △ D(gauge head and measured surface) there are good linear relationship, Pb initial value should adjust to value near Pa.By regulating the aperture of adjustable nozzle 8 and adjustable nozzle 9, can make the utility model be applicable to the employed various gauge heads of former buoy formula weight instrument, comprise φ 3 following aperture gauge heads.
Providing one group below is the result that the axial gauge head of jet hole carries out the technical indicator calibrating with φ 2:
Table 1
| Datum mark mm | Measurement range mm | Error of indication μ m | ||
| Requirement | Verification result | The raw readings numbering | ||
| ±0.07 | 0.014 | 0.3 | 0.2 | 13 ＃ |
| 0.026 | 0.6 | 0.4 | 13 ＃ | |
| ±0.013 | 0.026 | 0.6 | 0.5 | 14 ＃ |
| 0.038 | 1.0 | 0.8 | 14 ＃ | |
| ±0.02 | 0.04 | 1.1 | 1.1 | 15 ＃ |
| 0.052 | 1.7 | 1.7 | 15 ＃ | |
It below is the explanation to accompanying drawing 1.
10--pressure sensor 11--voltage amplification
12--A/D conversion 13--numeral shows
14--button 15--single-chip microprocessor system
The 16--numeral shows the 17--printer
Claims (2)
1, a kind of intelligent digital display air-gauge, have the routine measurement head, nozzle and adjustable nozzle, it is characterized in that: it comprises a guidance panel, be positioned at the LCD on the guidance panel, housing and the gas path device that is arranged in housing, pressure transducer, amplifier, 12 A/D chips, single-chip microcomputer, the mini-printer that is connected with single-chip microcomputer, the pressure transducer two ends have bridge power supply, this pressure transducer is arranged between gas path device PaPb, measure the variable signal of gas circuit pressure differential deltap P, again with amplifier, 12 A/D chips, single-chip microcomputer is electrically connected in proper order, and single-chip microcomputer is connected with button and LCD on the guidance panel simultaneously, signal is after amplifier amplifies, enter the A/D conversion again, become digital quantity, carry out numeral by LCD and show, insert single-chip microcomputer simultaneously, by single-chip microcomputer measurement data is handled, single-chip microcomputer is accepted steering order and initialize data by button, and the data after the processing are exported by mini-printer.
2, a kind of intelligent digital display air-gauge according to claim 1 is characterized in that: describedly be divided into three the tunnel: the one tunnel by the gas circuit behind the reduction valve and escape into atmosphere through fixed nozzle 5 and fixed nozzle 6; Another road air-flow is behind nozzle 7, and part escapes into atmosphere through gauge head 3 and the gap that measured piece forms, and part enters atmosphere through adjustable nozzle 9, and the Third Road air-flow from gauge head 3, or is overflowed from adjustable nozzle 9 behind adjustable nozzle 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93223928 CN2207566Y (en) | 1993-09-11 | 1993-09-11 | intelligent digtal display pneumatic measuring meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93223928 CN2207566Y (en) | 1993-09-11 | 1993-09-11 | intelligent digtal display pneumatic measuring meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2207566Y true CN2207566Y (en) | 1995-09-13 |
Family
ID=33802106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93223928 Expired - Fee Related CN2207566Y (en) | 1993-09-11 | 1993-09-11 | intelligent digtal display pneumatic measuring meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2207566Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102798497A (en) * | 2012-08-13 | 2012-11-28 | 国家海洋技术中心 | Intelligent atmospheric pressure measuring device |
| CN104457628A (en) * | 2014-11-28 | 2015-03-25 | 华北水利水电大学 | Programmable pneumatic electronic measuring device |
| CN107607252A (en) * | 2017-10-19 | 2018-01-19 | 西安五湖智联半导体有限公司 | A kind of pneumatic microspur instrument of sub-micrometer precision based on MEMS pressure sensor |
| CN107677226A (en) * | 2017-11-18 | 2018-02-09 | 北京工业大学 | Axial workpiece Endoporus measuring device |
-
1993
- 1993-09-11 CN CN 93223928 patent/CN2207566Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102798497A (en) * | 2012-08-13 | 2012-11-28 | 国家海洋技术中心 | Intelligent atmospheric pressure measuring device |
| CN104457628A (en) * | 2014-11-28 | 2015-03-25 | 华北水利水电大学 | Programmable pneumatic electronic measuring device |
| CN107607252A (en) * | 2017-10-19 | 2018-01-19 | 西安五湖智联半导体有限公司 | A kind of pneumatic microspur instrument of sub-micrometer precision based on MEMS pressure sensor |
| CN107677226A (en) * | 2017-11-18 | 2018-02-09 | 北京工业大学 | Axial workpiece Endoporus measuring device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4550592A (en) | Pneumatic gauging circuit | |
| CN100590399C (en) | Flow rate sensor calibrating method in medical respiration mechanics module | |
| CN101936791A (en) | Digital pressure gauge | |
| EP0229534A3 (en) | Combination pressure probe | |
| US4142401A (en) | Gage | |
| CN201754115U (en) | Digital pressure meter | |
| CN2207566Y (en) | intelligent digtal display pneumatic measuring meter | |
| CN100356176C (en) | Miniature low-speed airspeed meter for miniature aircraft | |
| CN201096843Y (en) | Detection device for measuring metal conductivity instrument based on backset phase | |
| CN206488401U (en) | A kind of load-type ice measuring device | |
| CN206740279U (en) | A kind of pressure measurement circuitry | |
| CN202048936U (en) | Micro differential pressure measuring instrument | |
| CN2577235Y (en) | High-precision gain-adjustable dynamic strain instrument | |
| US4454762A (en) | Measurement system with remote display | |
| CN2229084Y (en) | Microcomputerized in-line measurement multipurpose digital meter | |
| CN2230928Y (en) | Portable intellectual micro-pressure difference and wind velocity gauge | |
| CN105043665A (en) | Intensity of pressure detection system possessing automatic calibration function and calibration method thereof | |
| CN208091399U (en) | A kind of novel detection circuit of the high precision high stability based on pneumoelectric electron beam | |
| CN219495522U (en) | Piezoresistive pressure sensor detection circuit | |
| CA1122444A (en) | Pneumatic flow measuring system | |
| CN2260319Y (en) | Instrument for testing pen-pressure during writing | |
| CN221281466U (en) | High-precision current signal output circuit | |
| CN86200107U (en) | Planeness detection instrument | |
| CN220230665U (en) | Gas flow measuring device | |
| CN2593153Y (en) | Horizontal range measuring instrument |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |