CN201222046Y - Dry bulb external humidity sensor for dry and wet ball - Google Patents
Dry bulb external humidity sensor for dry and wet ball Download PDFInfo
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- CN201222046Y CN201222046Y CNU2008200506352U CN200820050635U CN201222046Y CN 201222046 Y CN201222046 Y CN 201222046Y CN U2008200506352 U CNU2008200506352 U CN U2008200506352U CN 200820050635 U CN200820050635 U CN 200820050635U CN 201222046 Y CN201222046 Y CN 201222046Y
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- humidity sensor
- dry bulbs
- thermometer
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Abstract
The utility model discloses an external-dry-bulb type wet-and-dry bulb humidity sensor comprising a semi-closed casing, an upper water cup, a humidity thermometer and gauze, wherein the upper water cup, the humidity thermometer and the gauze are all arranged in the semi-closed casing, one end of the gauze is arranged in the upper water cup, and the other end is covered on the end of the wet bulb thermometer. The technical scheme includes arranging a ventilating device capable of adjusting evaporating speed of water vapor on the surface of the wet bulb thermometer inside the semi-closed casing, and arranging a dry bulb thermometer for measuring environmental temperature outside the semi-closed casing. The external-dry-bulb type wet-and-dry bulb humidity sensor can be operated in severe conditions of acid, alkali, dust, alternation of humidity and temperature, high temperature, high humidity and the like, and has the advantages of high accuracy, good stability, low cost, easy maintenance, damage resistance and the like.
Description
[technical field]
The present invention relates to do in the digital display electrically ventilating psychrometer device of wet method Relative Humidity Measuring, it is made up of two thermometers, last water tumbler and radiation proof pillar etc., is commonly called as the wet and dry bulb humidity sensor.
[background technology]
In departments such as industrial and agricultural production, meteorology, environmental protection, national defence, space flight, scientific experiment, product detections, often need measure and control ambient humidity, particularly scientific experiment, product detect especially product feasibility test, and control and measurement warm, humidity are all had strict regulation.Relative temperature is measured, and moisture measurement is more complex, and temperature is individual independently measured, and humidity is subjected to the influence of other factors (acid, alkali, grit in the measurand, atmospheric pressure etc.).
The method for expressing of humidity there is ratio (weight or volume) of absolute humidity, relative humidity, dew point, moisture and dry gas or the like.In the metering technology normalized method, relative humidity is defined as " number percent of the mole fraction of saturated steam under the mole fraction of water vapor and uniform temp and the pressure condition in the moisture, the perhaps ratio of Saturated water vapor pressure under the partial pressure value of water vapor and the uniform temp in the moisture ".Humidity is long ago just produced with the human lives and is existed confidential relation, but because the diversity and the complicacy of measurand will accurately be measured professional knowledge and various humidity measuring device that the humidity under the various conditions need be correlated with.Modern times, accurately the moisture measurement scheme was topmost to be had: wet and dry bulb hygrometry, electronic type humidity sensor hygrometry, accurate dew-point hygrometer method.Though the human wet and dry bulb hygrometry of using is measured the existing history that surpasses 200 years of humidity, owing to various reasons, measure humidity and be under the condition that is confined under the normal temperature or not to be higher than 50 ℃ and use, using maximum is the humiture of measurement environment.The wet and dry bulb hygrometry adopts indirect measurement method, obtains humidity value by the temperature of measuring dry bulb, wet bulb through calculating or tabling look-up.The accuracy and the duty of dry bulb, two thermometers of wet bulb depended in the accuracy of psychrometer.Wet bulb thermometer must be under the ventilation condition constant under the dampness (generally being more than the 2.5m/s), and dry bulb will accurately reflect the environment temperature of measurand, and moisture measurement just can reach the accuracy of regulation.
Existing wet and dry bulb hygrometric sensor, generally comprised housing, in housing, be placed with wet bulb platinum-resistance thermometer and dry bulb platinum-resistance thermometer, on water tumbler and ventilator etc., the corresponding GB 6999-1986 of temperature value " environmental test relative humidity table for reference " that surveys according to wet and dry bulb can learn the relative humidity of environment.(temperature is 0 ℃～50 ℃ to such sensor, and humidity is that 0%RH～80%RH) measurement can be said to be more accurate at low temperature and low humidity.At high temperature (as 50 ℃～99 ℃) high humidity (under the environment of 80%RH～99%RH), dry bulb thermometer, be easy to be in dampness even speckle with the globule, when running into the wind speed about 2.5m/s, the temperature that dry bulb thermometer is surveyed (reflection) is not the temperature (littler than environment temperature) of environment just, thereby obviously influence the relative humidity measurement error, the operating temperature range of restriction aspirated psychrometer.
[summary of the invention]
The present invention has overcome the deficiency of above-mentioned technology, and a kind of humidity sensor for wet and dry bulbs with external dry bulbs that can more accurately measure humidity under hot and humid condition is provided.
For realizing above purpose, the present invention adopts following technical scheme:
Humidity sensor for wet and dry bulbs with external dry bulbs, include semiclosed housing, be provided with water tumbler, wet bulb thermometer, an end in semiclosed enclosure interior and be positioned over the gauze that the inner other end of water tumbler encases the wet bulb thermometer end, it is characterized in that, be provided with the ventilation unit of scalable wet bulb thermometer surface water steam raising speed in semiclosed enclosure interior, be provided with the dry bulb thermometer that is used for the testing environment temperature in semiclosed outside.
Aforesaid humidity sensor for wet and dry bulbs with external dry bulbs is characterized in that, is fixed with the outer pillar that covers on the dry bulb thermometer outside on semiclosed housing.
Aforesaid humidity sensor for wet and dry bulbs with external dry bulbs is characterized in that, at semiclosed housing internal fixation the inner protective tube that covers on the wet bulb thermometer outside is arranged.
Aforesaid humidity sensor for wet and dry bulbs with external dry bulbs is characterized in that, ventilation unit is a fan.
Aforesaid humidity sensor for wet and dry bulbs with external dry bulbs is characterized in that dry-bulb temperature is counted platinum-resistance thermometer.
Aforesaid humidity sensor for wet and dry bulbs with external dry bulbs is characterized in that, wet bulb thermometer also is a platinum-resistance thermometer.
Aforesaid humidity sensor for wet and dry bulbs with external dry bulbs is characterized in that, semiclosed housing comprises upper casing and lower casing, and upper casing and lower casing link together by the contiguous block that places their inside.
Aforesaid humidity sensor for wet and dry bulbs with external dry bulbs is characterized in that, contiguous block is provided with the fixed block that is used for fixing described wet bulb thermometer; Have on the contiguous block fix respectively described on the fixed orifice of water tumbler, inner protective tube, described gauze one end penetrates a fixed orifice and extend in the watering machine, the other end penetrates another fixed orifice and the wet bulb thermometer end is encased.
Aforesaid humidity sensor for wet and dry bulbs with external dry bulbs is characterized in that, upper casing is by a metal tube and cover the lid of bringing the air port at metal tube one end and form; Lower casing is a metal tube.
Compared with prior art, the invention has the beneficial effects as follows: 1, owing to wet bulb thermometer among the present invention is placed in the housing, the dry bulb thermometer that is used for the testing environment temperature is placed outside, dry bulb thermometer can not run into the wind speed that influences its reflection environment temperature under hot and humid condition, dry bulb thermometer can reflect the temperature of environment more accurately.The present invention can (measure the relative humidity of environment accurately at high temperature (as 50 ℃～99 ℃) high humidity under as the environment of 80%RH～99%RH) like this; 2, the humidity measuring device formed of the present invention digital display electrically ventilating psychrometer display part of cooperating singlechip technology that I utilize exploitation to have temperature correction and atmospheric pressure compensate function has numerous advantages: the accuracy height, good stability, can be operated in various mal-conditions (as acid, alkali, grit, the humiture alternation, hot and humid etc.) under, cost is low, safeguards easily, and is not fragile etc.Technical indicator reaches the requirement of humidity secondary standard device in " JJG 993-2004 electrically ventilating psychrometer vertification regulation ", and maximum tolerance is ± 2%RH; Can satisfy in " JJF 1101-2003 environmental test equipment temperature, humidity calibration standard " the requirement of moisture measurement standard, be preferential humidity measuring device among the JJF 1101-2003.
[description of drawings]
Fig. 1 is the stereographic map of invention;
Fig. 2 is an explosive view of the present invention;
Fig. 3 is a vertical view of the present invention;
Fig. 4 is the A-A cut-open view of Fig. 3.
Be described in further detail below in conjunction with accompanying drawing and embodiments of the present invention.
[embodiment]
Referring to Fig. 1 to Fig. 4, the present invention is a humidity sensor for wet and dry bulbs with external dry bulbs, includes semiclosed housing 1, is provided with water tumbler 2, wet bulb thermometer 3, gauze 4 in semiclosed housing 1 inside.Fill distilled water in last water tumbler 2, the effect of last water tumbler 2 is in order to give water on the gauze 4.One end of described gauze 4 is positioned in the water tumbler 2 and soaks in water, and its other end encases wet bulb thermometer 3 ends, and the water that fills in the water tumbler 2 can be soaked wet bulb thermometer 3 ends by gauze 4, makes wet bulb thermometer 3 be in dampness.For wet bulb thermometer 3 is worked under the above wind speed of constant 2.5m/s, in semiclosed housing 1, also be provided with ventilation unit 5, ventilation unit 5 adopts fan among the present invention.Because housing of the present invention is semienclosed, under the effect of ventilation unit 5, wet bulb thermometer 3 places have the above wind speed of 2.5m/s.Also be provided with the dry bulb thermometer 6 that is used for the testing environment temperature in semiclosed housing 1 outside.Because dry bulb thermometer 6 of the present invention is placed outside, dry bulb thermometer 6 can not run into the wind speed that influences its reflection environment temperature under hot and humid situation, and dry bulb thermometer 6 can reflect the temperature of environment more accurately.The present invention can (measure the relative humidity of environment accurately at high temperature (as 50 ℃～99 ℃) high humidity under as the environment of 80%RH～99%RH) like this.Dry bulb thermometer 6 and wet bulb thermometer 3 among the present invention all adopt platinum-resistance thermometer.
Claims (9)
1, humidity sensor for wet and dry bulbs with external dry bulbs, include semiclosed housing (1), be provided with water tumbler (2), wet bulb thermometer (3), an end in semiclosed housing (1) inside and be positioned over the gauze (4) that the inner other end of water tumbler (2) encases wet bulb thermometer (3) end, it is characterized in that, be provided with the ventilation unit (5) of scalable wet bulb thermometer (3) surface water steam raising speed in semiclosed housing (1) inside, be useful on the dry bulb thermometer (6) of testing environment temperature in semiclosed housing (1) outer setting.
2, humidity sensor for wet and dry bulbs with external dry bulbs according to claim 1 is characterized in that, is fixed with to cover on the outside outer pillar (7) of dry bulb thermometer (6) on semiclosed housing (1).
3, humidity sensor for wet and dry bulbs with external dry bulbs according to claim 1 is characterized in that, has at semiclosed housing (1) internal fixation to cover on the outside inner protective tube (8) of wet bulb thermometer (3).
4, humidity sensor for wet and dry bulbs with external dry bulbs according to claim 1 is characterized in that, ventilation unit (5) is a fan.
5, humidity sensor for wet and dry bulbs with external dry bulbs according to claim 1 is characterized in that, dry bulb thermometer (6) is a platinum-resistance thermometer.
6, humidity sensor for wet and dry bulbs with external dry bulbs according to claim 1 is characterized in that, wet bulb thermometer (3) also is a platinum-resistance thermometer.
7, humidity sensor for wet and dry bulbs with external dry bulbs according to claim 1, it is characterized in that, semiclosed housing (1) comprises upper casing (9) and lower casing (10), and upper casing (9) and lower casing (10) link together by the contiguous block (11) that places their inside.
8, humidity sensor for wet and dry bulbs with external dry bulbs according to claim 7 is characterized in that, contiguous block (11) is provided with the fixed block (16) that is used for fixing described wet bulb thermometer (3); On contiguous block (11), have and fix the described fixed orifice (12,15) of going up water tumbler (2), inner protective tube (7) respectively, described gauze (4) one ends penetrate a fixed orifice (12) and extend in the watering machine (2), and the other end penetrates another fixed orifice (15) and wet bulb thermometer (3) end is encased.
9, humidity sensor for wet and dry bulbs with external dry bulbs according to claim 7 is characterized in that, upper casing (9) is by a metal tube and cover the lid (13) of bringing air port (14) at metal tube one end and form; Lower casing (10) is a metal tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200506352U CN201222046Y (en) | 2008-07-08 | 2008-07-08 | Dry bulb external humidity sensor for dry and wet ball |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200506352U CN201222046Y (en) | 2008-07-08 | 2008-07-08 | Dry bulb external humidity sensor for dry and wet ball |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201222046Y true CN201222046Y (en) | 2009-04-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200506352U Expired - Fee Related CN201222046Y (en) | 2008-07-08 | 2008-07-08 | Dry bulb external humidity sensor for dry and wet ball |
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| CN (1) | CN201222046Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101625332B (en) * | 2008-07-08 | 2012-01-25 | 广东省中山市质量计量监督检测所 | Humidity sensor for wet and dry bulbs with external dry bulbs |
| CN103454310A (en) * | 2013-08-30 | 2013-12-18 | 广州赛宝计量检测中心服务有限公司 | Standard ventilating psychrometer |
| CN109752050A (en) * | 2019-02-28 | 2019-05-14 | 中国气象局气象探测中心 | A kind of outfield ventilation temperature moisture measurement standard and its measurement method |
| CN113791119A (en) * | 2021-10-14 | 2021-12-14 | 云南省烟草农业科学研究院 | Bulk curer dry-wet bulb temperature sensor |
-
2008
- 2008-07-08 CN CNU2008200506352U patent/CN201222046Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101625332B (en) * | 2008-07-08 | 2012-01-25 | 广东省中山市质量计量监督检测所 | Humidity sensor for wet and dry bulbs with external dry bulbs |
| CN103454310A (en) * | 2013-08-30 | 2013-12-18 | 广州赛宝计量检测中心服务有限公司 | Standard ventilating psychrometer |
| CN109752050A (en) * | 2019-02-28 | 2019-05-14 | 中国气象局气象探测中心 | A kind of outfield ventilation temperature moisture measurement standard and its measurement method |
| CN109752050B (en) * | 2019-02-28 | 2023-12-05 | 中国气象局气象探测中心 | External field ventilation temperature and humidity measurement standard device and measurement method thereof |
| CN113791119A (en) * | 2021-10-14 | 2021-12-14 | 云南省烟草农业科学研究院 | Bulk curer dry-wet bulb temperature sensor |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090415 Termination date: 20100708 |