CN2217793Y - Digital wind volume and pressure measuring meter - Google Patents
Digital wind volume and pressure measuring meter Download PDFInfo
- Publication number
- CN2217793Y CN2217793Y CN 94224148 CN94224148U CN2217793Y CN 2217793 Y CN2217793 Y CN 2217793Y CN 94224148 CN94224148 CN 94224148 CN 94224148 U CN94224148 U CN 94224148U CN 2217793 Y CN2217793 Y CN 2217793Y
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- CN
- China
- Prior art keywords
- received
- digital
- output
- single card
- card microcomputer
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- 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
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Abstract
The utility model discloses a digital type air quantity and air pressure measuring instrument, relating to a digital instrument used for detecting air quantity and air pressure by using a single-board computer to control the operation. The utility model is composed of a high precision semiconductor differential pressure sensor, an operational amplifier, a single-board computer, a digital displaying element, and a working power supply. The utility model synthesizes a sensor, an amplifier, an intelligent operating controller and a digital display into a whole and has the advantages of high measuring precision, strong anti-interference ability, convenient installation and use, no need for manual transformation, and the air pressure value of an air quantity machine can be observed visually.
Description
The utility model belongs to digital airflow pressure detection technique field.
The industrial furnace of the melting burning of air blast, the size of its air quantity and blast directly influences the temperature in the stove, thereby influences the quality of melting, and present air quantity and blast measuring instrument, abacus add " U " type pipe indication differential pressure value; Obtaining airflow value after converting through evolution, perhaps orifice plate adds differential pressure transmitter and indicates differential pressure value with pointer gauge again, is converted into airflow value then again.It also is with " U " type pipe (mercury slug) that blast detects, and perhaps adds the pointer gauge indication with pressure unit.These accuracy of instrument are low, can not intuitively read its airflow value, must be through the manual conversion, and pointer gauge reduces precision easily in the more occasion of dust, and its cost is also higher.
The purpose of this utility model provides a kind of numeral directly perceived of single card microcomputer control computing of utilizing and shows the airflow pressure value, its sensor adopts higher precision differential pressure and pressure transducer, and cost is low easy to use, the collection sensor, the intelligence computing, numeral is shown in the airflow pressure detector of one.
The utility model detects air quantity and adopts the high-precision semiconductor differential pressure pick-up, two input head before and after receiving the ajutage aperture plate takes out differential pressure signal, be transformed into electric signal, the output of sensor is amplified through operational amplifier, deliver to single card microcomputer, carry out processing such as analog to digital conversion and evolution compensation, deliver to the digital display device and show air quantity (m
3/ mim).Detect blast and adopt the high-precision semiconductor pressure transducer, an one input head is received in the ajutage, blast is taken out be transformed into electric signal, also amplifies to deliver to through operational amplifier and carries out digital processing in the single card microcomputer, delivers to display device again and shows wind pressure value kpa.Single card microcomputer is by analog switch, and analog to digital conversion, CPU can wipe program storage and interface circuit is formed, and display device is made up of driver and charactron.The working power of each electron device is that the precision DC stabilized voltage supply through two-stage voltage stabilizing high stable provides, the working power of sensor adopts constant current source power supply, the whole instrument compact conformation, be assembled into a wall-hanging cabinet, only show air quantity and wind pressure value on the panel without any switch and knob, its power switch and differential pressure, pressure sensor blast connection all are located at the side of instrument container.
The utility model advantage, collection high-precision semiconductor sensor, electronic circuit display device and accurate pressure-stabilizing constant flow come from one, and numeral directly perceived shows the airflow pressure value.Owing to adopt single card microcomputer control, so the few circuit of device is produced simply easily and cost is low, the working power of high this instrument of measuring accuracy is adopted the two-stage voltage stabilizing accurate stabilized voltage supply and constant current source, so this equipment anti-interference ability is strong, environment for use is less demanding.
Description of drawings: accompanying drawing 1 is the schematic block circuit diagram of digital airflow pressure instrument; 1 is the high-precision semiconductor differential pressure pick-up among the figure, two input adapters wherein, receive respectively before and after the orifice plate in the ajutage, the 13rd, the high-precision semiconductor pressure transducer, an input adapter is received in the ajutage, two operational amplifiers 2 are received in the output of two sensors respectively, and single card microcomputer 3 is all received in the output of operational amplifier 2.Single card microcomputer 3 is by analog switch, analog to digital conversion, CPU, program storage, interface circuit is formed, display device 4 and 5,4th are received in the output of single card microcomputer 3, and air quantity shows that charactron is connected by the driver that promotes charactron and the output of single card microcomputer 3, and the 5th, blast shows that charactron is connected by the driver that promotes charactron and the output of single card microcomputer 3.The 6th, through the precision DC stabilized voltage supply of twice voltage stabilizing, supply with each electron device of instrument, the 7th, constant current source is specialized in high-precision semiconductor differential pressure pick-up 1 and high-precision semiconductor pressure transducer 13.
Accompanying drawing 2 is one-piece construction figure of digital airflow pressure instrument, 4 is that air quantity shows charactron among the figure, there are four, the 5th, blast shows that charactron also has four, eight charactrons " one " word row, four one group, occupy in the middle of the instrument panel 12,8 is all electron devices of dress in the cabinet, the 9th, mounting plate, the 10th, the input adapter of high-precision semiconductor differential pressure pick-up 1 and high-precision semiconductor pressure transducer 13, high-precision semiconductor differential pressure pick-up have two input adapters, the high-precision semiconductor pressure transducer is an input adapter, the 11st, and power switch.
Embodiment, the utility model is CPU with 8031 on circuit, is furnished with integration type modulus conversion chip 14433, can wipe program storage 2732 chips, two 8155 of interface circuit configurations, the driver of display part is with 7406 and 7407, show that charactron adopts one inch seven-segment display digital tube, the signal of sensor output amplifies through 7650 operational amplifiers, again through analog switch 4066, again to 14433.Working power is that alternating current 220V becomes low pressure through transformer, becomes DC voltage through bridge path rectification then, passes through the secondary voltage stabilizing again, becomes 5 volts of accurate stabilized voltage supplys and supplies with each electron device.Probe power adopts constant current source power supply, so instrument stabilizer is reliable, and antijamming capability is strong.
Claims (3)
1, a kind of digital airflow pressure instrument, be by sensor, transducer, amplifier, single card microcomputer, digital display device and working power are formed, it is characterized in that, the front and back that two input heads (10) of high-precision semiconductor differential pressure pick-up (1) are received the ajutage aperture plate, operational amplifier (2) is received in its output, single card microcomputer (3) is received in the output of operational amplifier (2), digital display device (4) is received in the output of single card microcomputer (3), an input head (10) of high-precision semiconductor pressure transducer (13) is received ajutage, operational amplifier (2) is received in its output, single card microcomputer (3) is received in the output of operational amplifier (2), digital display device (5) is received in the output of single card microcomputer (3), (6) accurate stabilized voltage supply is received each electron device, and (7) constant current source is received high-precision semiconductor differential pressure pick-up (1) and high-precision semiconductor pressure transducer (13).
2, a kind of digital airflow pressure instrument according to claim 1 is characterized in that single card microcomputer (3) is by analog switch, analog to digital conversion, CPU, and program storage and interface circuit are formed.
3, a kind of digital airflow pressure instrument according to claim 1, it is characterized in that digital display device (4) is made up of driver and charactron, digital display device (5) also is that driver and charactron are formed, driver is received in the output that is veneer plate (3), and driver output promotes charactron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94224148 CN2217793Y (en) | 1994-07-07 | 1994-07-07 | Digital wind volume and pressure measuring meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94224148 CN2217793Y (en) | 1994-07-07 | 1994-07-07 | Digital wind volume and pressure measuring meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2217793Y true CN2217793Y (en) | 1996-01-17 |
Family
ID=33837642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94224148 Expired - Fee Related CN2217793Y (en) | 1994-07-07 | 1994-07-07 | Digital wind volume and pressure measuring meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2217793Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104949717A (en) * | 2015-06-29 | 2015-09-30 | 南京博沃科技发展有限公司 | Primary air flow measuring system for entrance of coal mill |
-
1994
- 1994-07-07 CN CN 94224148 patent/CN2217793Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104949717A (en) * | 2015-06-29 | 2015-09-30 | 南京博沃科技发展有限公司 | Primary air flow measuring system for entrance of coal mill |
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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 |