CN104483506B - Measuring wind speed device with monitoring function - Google Patents
Measuring wind speed device with monitoring function Download PDFInfo
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- CN104483506B CN104483506B CN201410729352.0A CN201410729352A CN104483506B CN 104483506 B CN104483506 B CN 104483506B CN 201410729352 A CN201410729352 A CN 201410729352A CN 104483506 B CN104483506 B CN 104483506B
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- wind speed
- compensator
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- thermal resistance
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Abstract
Measuring wind speed device of the present invention with monitoring function, including：Housing is set in housing there are two sensing circuit, and two sensing circuits are connect respectively with master controller and warning device；First sensor and second sensor, first sensor and second sensor are arranged on housing, and first sensor and second sensor are connect respectively with two sensing circuits.Measuring wind speed device of the present invention with monitoring function passes through sensor when air-flow so that sensing circuit RHUpper heat dissipation increases, and thermal balance is broken, RHOn Wen Duxiajiang, resistance value declines therewith, the size of the amplified direct reflection air velocitys of the potential difference V generated between V1 and V2.Two sensors of setting, are respectively detected the down current wind speed in workbench, the accuracy of detection are ensure that in a sensor degradation, prevents deviation.
Description
Technical field
The invention mainly relates to biological cleaning correlative technology fields, and in particular to a kind of band applied to clean bench
The measuring wind speed device of monitoring function.
Background technology
Clean bench is widely used in the industries such as medical treatment, pharmacy, food, electronics, instrument and meter and bioengineering,
Purpose is to provide the bacteria-and dust-free space of a part, to prevent the pollution of external microbe.Super-clean bench is moved by motor as air blast
Power by air by being sent out by high efficiency particulate air filter after-blow, forms the ultra-purify air laminar flow of continuously dust-free sterile, i.e. institute
It calls " efficient pure air ", it eliminates even 0.12 μm dust, fungi and bacterial spore etc. more than 0.3 μm.It is ultra-clean
The flow velocity of air prevented enough nearby air may harass caused by pollution, staff is just under such aseptic condition
Operation keeps sterilizable material not contaminated in seeded process is shifted.
The size of either vertically or horizontally air-flow velocity inside equipment in order to obtain needs measuring wind speed device to measure, by wind
Fast signal is converted to electric signal output, but wherein there is also certain hidden danger.Original wind speed measuring device only has a transportation work style
Fast measuring appliance come obtain wind speed output electric signal, if the measurement its aging or other reasons lead to itself in use
The signal measured is just inaccurate, then the wind speed measured can also be not allowed.
Measuring wind speed device of the present invention with monitoring function passes through sensor when air-flow so that sensing circuit RHUpper heat dissipation increases
More, thermal balance is broken, RHOn Wen Duxiajiang, resistance value declines therewith, and the potential difference V generated between V1 and V2 is put by differential
Big device is amplified to the size that suitable amplitude calculates air velocity by the AD conversion end conversion of master controller.Two of setting
Sensor is respectively detected the down current wind speed in workbench, and the essence of detection is ensure that in a sensor degradation
Exactness prevents deviation.
Invention content
The purpose of the present invention is to provide a kind of measuring wind speed devices with monitoring function for improving measuring accuracy.
In order to solve the above technical problems, the measuring wind speed device of the invention with monitoring function, including：Housing, in the housing
It inside sets there are two sensing circuit, two sensing circuits are connect respectively with master controller and warning device；First sensor and
Second sensor, the first sensor and the second sensor are set on the housing, the first sensor and institute
Second sensor is stated to connect with two sensing circuits respectively；Wherein described sensing circuit includes：Measure bridge；Temperature-compensating
Resistance RS, the thermo-compensator RSOne end is connect with the measurement bridge, the thermo-compensator RSAnother termination
Ground；Adding thermal resistance RH, the adding thermal resistance RHOne end is connect with the measurement bridge, the adding thermal resistance RHThe other end ground connection.
The measurement bridge includes：First resistor R1, second resistance R2 and the 3rd resistor R3 being sequentially connected in series；Temperature-compensating
Resistance RS, the thermo-compensator RSOne end is connect with the first resistor R1, the thermo-compensator RSAnother termination
Ground；Adding thermal resistance RH, the adding thermal resistance RHOne end is connect with the 3rd resistor R3, the adding thermal resistance RHAnother termination
Ground；
Differential amplifier circuit A1, the differential amplifier circuit A1 inputs are connect with measuring the V1 and V2 of bridge, by V1 and V2
It is exported after 2 points of voltage difference amplification to the AD conversion end of master controller.
The adding thermal resistance RHResistance value at 0 DEG C between 10 ohm to 50 ohm, thermo-compensator RsResistance value exist
For between 1K ohm to 10K ohm at 0 DEG C
Measuring wind speed device of the present invention with monitoring function passes through sensor when air-flow so that sensing circuit RHUpper heat dissipation increases
More, thermal balance is broken, RHOn Wen Duxiajiang, resistance value declines therewith, and the potential difference V generated between V1 and V2 is put by differential
Big device is amplified to the size that suitable amplitude calculates air velocity by the AD conversion end conversion of master controller.Two of setting
Sensor is respectively detected the wind speed in workbench, and the accuracy of detection is ensure that in a sensor degradation, is prevented
Generate deviation.When the wind speed monitoring signal measured continuously has exceeded the upper limit value or lower limiting value of setting, master controller passes through report
Alarm device sends out sound and light alarm signal and prompts the correction in time of the abnormal needs of current wind speed or replace wind speed measuring device, improves
The security performance of clean bench.
Description of the drawings
Fig. 1 is the measuring wind speed device structure diagram of the invention with monitoring function；
Fig. 2 is the measuring wind speed device sensing circuit figure of the invention with monitoring function.
Fig. 3 is the measuring wind speed device module frame chart of the invention with monitoring function.
Reference sign in measuring wind speed device attached drawing of the present invention with monitoring function：
1- housing 2- first sensor 3- second sensors
Specific embodiment
Measuring wind speed device of the present invention with monitoring function is described in further detail below in conjunction with the accompanying drawings.
As shown in FIG. 1 to 3, the measuring wind speed device of the invention with monitoring function, including：Housing 1 and mounted on housing 1
Interior two sensing circuits, master controller and warning device, first sensor 2 and second sensor 3 are electric with two sensings respectively
Road connects, for detecting the wind speed in workbench.
Wherein sensing circuit includes the measurement that the first resistor R1, the second resistance R2 that are sequentially connected in series and 3rd resistor R3 are formed
Bridge, thermo-compensator RSOne end is connect with first resistor R1, other end ground connection；Adding thermal resistance RHOne end and 3rd resistor R3
Connection, other end ground connection.RHIt is R2 × R with Rs and the relational expression for measuring bridgeH=R3 × (R1+Rs).When air-flow is static, lead to
Crossing setting circuit parameter makes to pass through RHElectric current maintain a certain quiescent current to keep RHOn temperature higher than environment temperature it is a certain
Numerical value.When air-flow passes through 3 R of first sensor 2 and second sensorHUpper heat dissipation increases, and thermal balance is broken, RHOn temperature
Degree declines, and resistance value declines therewith, and the potential difference V generated between V1 and V2 directly reflects the size of air velocity.
Measuring wind speed device of the present invention with monitoring function passes through sensor when air-flow so that sensing circuit RHUpper heat dissipation increases
More, thermal balance is broken, RHOn Wen Duxiajiang, resistance value declines therewith, and the potential difference V generated between V1 and V2 is put by differential
Big device is amplified to the size that suitable amplitude calculates air velocity by the AD conversion end conversion of master controller.Two of setting
Sensor is respectively detected the wind speed in workbench, and the accuracy of detection is ensure that in a sensor degradation, is prevented
Generate deviation.When the wind speed monitoring signal measured continuously has exceeded the upper limit value or lower limiting value of setting, master controller passes through report
Alarm device sends out sound and light alarm signal and prompts the correction in time of the abnormal needs of current wind speed or replace wind speed measuring device, improves
The security performance of clean bench.
The preferred embodiment of the invention is illustrated above, but the invention be not limited to it is described
Embodiment, those skilled in the art can also make various equivalent under the premise of without prejudice to the invention spirit
Modification or replacement, these equivalent modifications or replacement are all contained in the application claim limited range.
Claims (2)
1. the measuring wind speed device with monitoring function, which is characterized in that including：
Housing is set in the housing there are two sensing circuit, and two sensing circuits fill respectively with master controller and alarm
Put connection；
First sensor and second sensor, the first sensor and the second sensor are arranged in the housing, institute
First sensor and the second sensor is stated to connect with two sensing circuits respectively；Wherein
The sensing circuit includes：
Measure bridge；
Thermo-compensator RS, the thermo-compensator RSOne end is connect with the measurement bridge, the thermo-compensator RS
The other end ground connection；
Adding thermal resistance RH, the adding thermal resistance RHOne end is connect with the measurement bridge, the adding thermal resistance RHAnother termination
Ground；
Wherein, the measurement bridge includes：
First resistor R1, second resistance R2 and the 3rd resistor R3 being sequentially connected in series；
Thermo-compensator RS, the thermo-compensator RSOne end is connect with the first resistor R1, the thermo-compensator
RSThe other end ground connection；
Adding thermal resistance RH, the adding thermal resistance RHOne end is connect with the 3rd resistor R3, the adding thermal resistance RHAnother termination
Ground；
Differential amplifier circuit A1, the differential amplifier circuit A1 input company of the anode of the differential amplifier circuit with measuring bridge
The cathode of contact and the differential amplifier circuit and the tie point for measuring bridge, by the anode of the differential amplifier circuit and measurement
It is exported after the tie point of bridge and the cathode of the differential amplifier circuit and the voltage difference amplification of 2 points of the tie point of measurement bridge
To the AD conversion end of master controller.
2. the measuring wind speed device according to claim 1 with monitoring function, which is characterized in that the adding thermal resistance RHResistance
Value at 0 DEG C between 10 ohm to 50 ohm, thermo-compensator RsResistance value at 0 DEG C for 1K ohm to 10K ohms
Between.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410729352.0A CN104483506B (en) | 2014-12-04 | 2014-12-04 | Measuring wind speed device with monitoring function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410729352.0A CN104483506B (en) | 2014-12-04 | 2014-12-04 | Measuring wind speed device with monitoring function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104483506A CN104483506A (en) | 2015-04-01 |
| CN104483506B true CN104483506B (en) | 2018-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410729352.0A Active CN104483506B (en) | 2014-12-04 | 2014-12-04 | Measuring wind speed device with monitoring function |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107192471B (en) * | 2017-04-13 | 2019-04-12 | 南京史利姆电子科技有限公司 | It is a kind of for the New temperature compensation circuit of pneumatic sensor and compensation method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1120670A (en) * | 1994-07-20 | 1996-04-17 | 株式会社村田制作所 | Air flow sensor |
| CN101349708A (en) * | 2008-07-04 | 2009-01-21 | 东南大学 | Micro-mechanical two-dimension wind speed and wind direction sensor and signal processing circuit thereof |
| CN101710710A (en) * | 2009-12-03 | 2010-05-19 | 天津理工大学 | Wind-power-station power output counterbalance system and working method thereof |
| CN103852594A (en) * | 2012-11-30 | 2014-06-11 | 上海力申科学仪器有限公司 | Wind speed measurement monitoring apparatus of biohazard safety equipment |
| CN204389524U (en) * | 2014-12-04 | 2015-06-10 | 上海力申科学仪器有限公司 | With the wind speed measuring device of monitoring function |
-
2014
- 2014-12-04 CN CN201410729352.0A patent/CN104483506B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1120670A (en) * | 1994-07-20 | 1996-04-17 | 株式会社村田制作所 | Air flow sensor |
| CN101349708A (en) * | 2008-07-04 | 2009-01-21 | 东南大学 | Micro-mechanical two-dimension wind speed and wind direction sensor and signal processing circuit thereof |
| CN101710710A (en) * | 2009-12-03 | 2010-05-19 | 天津理工大学 | Wind-power-station power output counterbalance system and working method thereof |
| CN103852594A (en) * | 2012-11-30 | 2014-06-11 | 上海力申科学仪器有限公司 | Wind speed measurement monitoring apparatus of biohazard safety equipment |
| CN204389524U (en) * | 2014-12-04 | 2015-06-10 | 上海力申科学仪器有限公司 | With the wind speed measuring device of monitoring function |
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| CN104483506A (en) | 2015-04-01 |
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