CN204389524U - With the wind speed measuring device of monitoring function - Google Patents
With the wind speed measuring device of monitoring function Download PDFInfo
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- CN204389524U CN204389524U CN201420754143.7U CN201420754143U CN204389524U CN 204389524 U CN204389524 U CN 204389524U CN 201420754143 U CN201420754143 U CN 201420754143U CN 204389524 U CN204389524 U CN 204389524U
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- measuring device
- speed measuring
- monitoring function
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Abstract
The wind speed measuring device of the utility model band monitoring function, comprising: housing, is provided with two sensing circuits in housing, and two sensing circuits are connected with master controller and warning device respectively; First sensor and the second sensor, first sensor and the second sensor setting are on housing, and first sensor and the second sensor are connected with two sensing circuits respectively.The wind speed measuring device of the utility model band monitoring function, when air-flow is by sensor, makes sensing circuit R
hupper heat radiation increases, and thermal equilibrium is broken, R
hon temperature decline, resistance declines thereupon, the size of the potential difference (PD) V produced between V1 and V2 direct reflection air velocity after amplifying.Two sensors arranged, detect the down current wind speed in worktable respectively, ensure that the degree of accuracy of detection, prevent deviation when a sensor degradation.
Description
Technical field
The utility model relates generally to biological purification correlative technology field, is specifically related to a kind of wind speed measuring device being applied to the band monitoring function of clean bench.
Background technology
Clean bench is widely used in the industries such as medical treatment, pharmacy, food, electronics, instrument and meter and bioengineering, its objective is the bacteria-and dust-free space providing a local, to prevent the pollution of external microbe.Super-clean bench makes blowing power by motor, by air by being sent out by high efficiency particulate air filter after-blow, form the ultra-purify air laminar flow of continuously dust-free sterile, i.e. so-called " efficient pure air ", it eliminates and is greater than 0.3 μm even dust of 0.12 μm, fungus and bacterium spore etc.The pollution that the flow velocity of ultra-purify air enough prevents neighbouring air from may harass and causes, staff just operates under such aseptic condition, keeps sterilizable material not contaminated in transfer seeded process.
In order to obtain the size of the vertical of device interior or horizontal gas flow flow velocity, needing measuring wind speed device to measure, wind velocity signal being converted to electric signal and exporting, but wherein also there is certain hidden danger.Original wind speed measuring device only has a transportation work style speed measuring appliance to export electric signal to obtain wind speed, if this measurement its in use aging the or other reasons signal that causes to record itself is just inaccurate, the wind speed so measured also can be forbidden.
The wind speed measuring device of the utility model band monitoring function, when air-flow is by sensor, makes sensing circuit R
hupper heat radiation increases, and thermal equilibrium is broken, R
hon temperature decline, resistance declines thereupon, and the potential difference (PD) V produced between V1 and V2 is amplified to suitable amplitude through the AD conversion end conversion of master controller through differential amplifier and calculates the size of air velocity.Two sensors arranged, detect the down current wind speed in worktable respectively, ensure that the degree of accuracy of detection, prevent deviation when a sensor degradation.
Utility model content
The purpose of this utility model is to provide a kind of wind speed measuring device improving the band monitoring function of measuring accuracy.
For solving the problems of the technologies described above, the wind speed measuring device of the utility model band monitoring function, comprising: housing, is provided with two sensing circuits in described housing, and two described sensing circuits are connected with master controller and warning device respectively; First sensor and the second sensor, on the housing, described first sensor and described second sensor are connected with two described sensing circuits respectively for described first sensor and described second sensor setting; Wherein said sensing circuit comprises: measure bridge road; Thermo-compensator R
s, described thermo-compensator R
sone end is connected with described measurement bridge road, described thermo-compensator R
sother end ground connection; Heating resistor R
h, described heating resistor R
hone end is connected with described measurement bridge road, described heating resistor R
hother end ground connection.
Described measurement bridge road comprises: the first resistance R1 connected successively and the second resistance R2; Thermo-compensator R
s, described thermo-compensator R
sone end is connected with described first resistance R1, described thermo-compensator R
sother end ground connection; Heating resistor R
h, described heating resistor R
hone end is connected with described second resistance R2, described heating resistor R
hother end ground connection;
Differential amplifier circuit A1, described differential amplifier circuit A1 input and are connected with V1 and V2 measuring bridge road, export the AD conversion end of master controller after the voltage difference of V1 and V2 2 being amplified to.
Described heating resistor R
hresistance is between 10 ohm to 50 ohm 0 DEG C time, thermo-compensator R
sresistance be between 1K ohm to 10K ohm 0 DEG C time
The wind speed measuring device of the utility model band monitoring function, when air-flow is by sensor, makes sensing circuit R
hupper heat radiation increases, and thermal equilibrium is broken, R
hon temperature decline, resistance declines thereupon, and the potential difference (PD) V produced between V1 and V2 is amplified to suitable amplitude through the AD conversion end conversion of master controller through differential amplifier and calculates the size of air velocity.Two sensors arranged, detect the wind speed in worktable respectively, ensure that the degree of accuracy of detection, prevent deviation when a sensor degradation.When the wind speed pilot signal recorded is continuously beyond higher limit or the lower limit of setting, master controller sends the abnormal needs of the current wind speed of sound and light alarm signal prompt by warning device and corrects in time or change wind speed measuring device, improves the security performance of clean bench.
Accompanying drawing explanation
Fig. 1 is the wind speed measuring device structural representation of the utility model band monitoring function;
Fig. 2 is the wind speed measuring device sensing circuit figure of the utility model band monitoring function.
Fig. 3 is the wind speed measuring device module frame chart of the utility model band monitoring function.
Description of reference numerals in the wind speed measuring device accompanying drawing of the utility model band monitoring function:
1-housing 2-first sensor 3-second sensor
Embodiment
Be described in further detail below in conjunction with the wind speed measuring device of accompanying drawing to the utility model band monitoring function.
As shown in FIG. 1 to 3, the wind speed measuring device of the utility model band monitoring function, comprise: housing 1 and two sensing circuits, master controller and warning devices being arranged in housing 1, first sensor 2 is connected with two sensing circuits respectively with the second sensor 3, for the wind speed in testing platform.
Wherein sensing circuit comprises the measurement bridge road of the first resistance R1 and the second resistance R2 formation of connecting successively, thermo-compensator R
sone end is connected with the first resistance R1, other end ground connection; Heating resistor R
hone end is connected with the second resistance R2, other end ground connection.When air-flow is static, make to pass through R by arranging circuit parameter
helectric current maintain a certain quiescent current to keep R
hon temperature higher than a certain numerical value of environment temperature.When air-flow makes R by first sensor 2 and the second sensor 3
hupper heat radiation increases, and thermal equilibrium is broken, R
hon temperature decline, resistance declines thereupon, and the potential difference (PD) V produced between V1 and V2 directly reflects the size of air velocity.
The wind speed measuring device of the utility model band monitoring function, when air-flow is by sensor, makes sensing circuit R
hupper heat radiation increases, and thermal equilibrium is broken, R
hon temperature decline, resistance declines thereupon, and the potential difference (PD) V produced between V1 and V2 is amplified to suitable amplitude through the AD conversion end conversion of master controller through differential amplifier and calculates the size of air velocity.Two sensors arranged, detect the wind speed in worktable respectively, ensure that the degree of accuracy of detection, prevent deviation when a sensor degradation.When the wind speed pilot signal recorded is continuously beyond higher limit or the lower limit of setting, master controller sends the abnormal needs of the current wind speed of sound and light alarm signal prompt by warning device and corrects in time or change wind speed measuring device, improves the security performance of clean bench.
Below the preferred embodiment that the utility model is created is illustrated, but the utility model is created and is not limited to described embodiment, those of ordinary skill in the art also can make all equivalent modification or replacement under the prerequisite without prejudice to the utility model creative spirit, and these equivalent modification or replacement are all included in the application's claim limited range.
Claims (2)
1. be with the wind speed measuring device of monitoring function, it is characterized in that, comprising:
Housing, is provided with two sensing circuits in described housing, and two described sensing circuits are connected with master controller and warning device respectively;
First sensor and the second sensor, described first sensor and described second sensor setting are in described housing, and described first sensor and described second sensor are connected with two described sensing circuits respectively; Wherein
Described sensing circuit comprises:
Measure bridge road;
Thermo-compensator R
s, described thermo-compensator R
sone end is connected with described measurement bridge road, described thermo-compensator R
sother end ground connection;
Heating resistor R
h, described heating resistor R
hone end is connected with the opposite side on described measurement bridge road, described heating resistor R
hother end ground connection.
2. the wind speed measuring device of band monitoring function according to claim 1, is characterized in that, described heating resistor R
hresistance is between 10 ohm to 50 ohm 0 DEG C time, thermo-compensator R
sresistance be between 1K ohm to 10K ohm 0 DEG C time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420754143.7U CN204389524U (en) | 2014-12-04 | 2014-12-04 | With the wind speed measuring device of monitoring function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420754143.7U CN204389524U (en) | 2014-12-04 | 2014-12-04 | With the wind speed measuring device of monitoring function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204389524U true CN204389524U (en) | 2015-06-10 |
Family
ID=53362232
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420754143.7U Active CN204389524U (en) | 2014-12-04 | 2014-12-04 | With the wind speed measuring device of monitoring function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204389524U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104483506A (en) * | 2014-12-04 | 2015-04-01 | 上海力申科学仪器有限公司 | Wind speed measurer with monitoring function |
| CN108871823A (en) * | 2018-04-28 | 2018-11-23 | 宁波威霖住宅设施有限公司 | A kind of strainer life testing method |
-
2014
- 2014-12-04 CN CN201420754143.7U patent/CN204389524U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104483506A (en) * | 2014-12-04 | 2015-04-01 | 上海力申科学仪器有限公司 | Wind speed measurer with monitoring function |
| CN104483506B (en) * | 2014-12-04 | 2018-06-26 | 上海力申科学仪器有限公司 | Measuring wind speed device with monitoring function |
| CN108871823A (en) * | 2018-04-28 | 2018-11-23 | 宁波威霖住宅设施有限公司 | A kind of strainer life testing method |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |