CN2300905Y - Portable microcomputer moisture meter - Google Patents
Portable microcomputer moisture meter Download PDFInfo
- Publication number
- CN2300905Y CN2300905Y CN 96245802 CN96245802U CN2300905Y CN 2300905 Y CN2300905 Y CN 2300905Y CN 96245802 CN96245802 CN 96245802 CN 96245802 U CN96245802 U CN 96245802U CN 2300905 Y CN2300905 Y CN 2300905Y
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- China
- Prior art keywords
- humidity
- diode
- cell
- hygronom
- temperature
- 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
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- 239000013078 crystal Substances 0.000 claims abstract description 4
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 4
- 238000009776 industrial production Methods 0.000 abstract 1
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 239000000523 sample Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The utility model relates to a hygrograph is applicable to the portable computer hygrograph that detects gaseous humidity among the industrial production, and it is as temperature element with the crystal diode, detects medium temperature and wet bulb temperature, and single chip microcomputer calculates absolute humidity and relative humidity according to medium temperature and wet bulb temperature, adopts liquid crystal digital display temperature, humidity value, and this hygrograph has measurement accuracy height, and is small, advantages such as convenient to carry.
Description
The utility model relates to a kind of hygronom, particularly a kind of portable microcomputer hygronom that is applicable to commercial production detected gas humidity.
At present, the measuring instrument of gas humidity in the commercial production, ventilated type commonly used is done, wet bulb thermometer, the humidity measuring instrument that the probe of also useful hygrometric degree and hygrometric degree instrument are formed.Ventilated type is done, wet bulb thermometer, and is simple in structure, but can not directly show humidity value, can only measure dried, wet-bulb temperature, need table look-up, and calculates absolute humidity, uses inconvenient.The probe that adopts humidity-sensitive element to constitute is connected with humidometer with cable, the device of measurement gas humidity, and volume is big, carries inconvenience.
The purpose of this utility model provides the portable microcomputer hygronom that a kind of volume is little, in light weight, measuring accuracy is high.
Above-mentioned purpose is realized by following technical scheme: at the back side of rectangular parallelepiped watchcase, one airtight cell is arranged, two crystal diode temperature elements are arranged in the cell, be contained on the insulation base, wherein the first half of a diode is enclosed within the little spring, little spring overcoat sheet, on the little chamber enclosure adjacent an aperture is arranged with sheet, bonding one plug in the aperture, cell has draft tube joint and escape pipe joint, two thermometric diodes insert two amplifying circuits of measuring temperature of hygronom respectively, the voltage signal that amplifies, enter single chip microcomputer by analog to digital converter, microcomputer output connects digital indicator, and the function button of control microcomputer has: medium temperature, wet-bulb temperature, absolute humidity, relative humidity.Installation function button on the instrument face plate, the power light of power switch has circuit board and dry cell in the watchcase.
Above-mentioned hygronom, tested gas is introduced cell with sebific duct from the draft tube joint, discharge by escape pipe, at cell outer wall plug sealed aperture place, in the sheet of wet bulb diode, inject the pure water of 0.3-0.4ml with syringe, it is the measurement temperature circuit of core with the operational amplifier that two thermometric diodes insert two respectively, measure medium temperature and wet-bulb temperature respectively, single chip microcomputer deposits the density value of the saturated vapor of different temperatures correspondence in, microcomputer calculates absolute humidity according to medium temperature and wet-bulb temperature, relative humidity, the absolute humidity computing formula is:
d
x＝d
H-0.5(t
o-t
H)
In the formula: d
x: absolute humidity of gas
t
o: medium temperature
t
H: wet-bulb temperature d
H: wet-bulb temperature t
HCorresponding saturated vapor density.Relative humidity is calculated formula;
In the formula: d
yBe medium temperature t
oCorresponding saturated vapor density.
With the button on the instrument face plate, survey medium temperature earlier, wet-bulb temperature when wet-bulb temperature is stablized, is pressed the absolute humidity key, promptly shows absolute humidity, promptly shows relative humidity by the relative humidity key.It is little that above-mentioned humidity by microcomputer instrument has a volume, and the precision height is easy to carry, advantage such as liquid crystal digital display medium temperature, absolute humidity, relative humidity are multi-functional.
Introduce a kind of embodiment below in conjunction with accompanying drawing
Fig. 1 is a present embodiment measuring principle block scheme
Fig. 2 is the front view of present embodiment hygronom
Fig. 3 is the side view of present embodiment hygronom
Fig. 4 is the front view of the airtight cell of present embodiment
Fig. 5 is the cross section view of Fig. 4 along the A-A line
Fig. 6 is present embodiment temperature measuring circuit figure
Fig. 7 is the present embodiment circuit diagram
As shown in the figure, Fig. 3, Fig. 4, the hygronom back side airtight cell (24) that bonds, (24) draft tube joint (15) and escape pipe joint (16) are arranged, thermometric crystal diode (1) is arranged in the cell (24), (4), little spring (17) is arranged on (1), go up cover sheet (18) in (17), (18) on adjacent cell (24) wall aperture is arranged, sealing plug (19) is arranged in the hole, diode (1) (4) is contained in respectively on the base (20) (21), (1) (4) insert the interior measurement amplifying circuit (2) (5) of watchcase (23) with electric wire, (2) output voltage signal of (5) connects analog to digital converter (3) (6), (3) output signal of (6) inserts single chip microcomputer (7), (7) numerical value that calculates is shown with liquid crystal digital display (8), the press key control of microcomputer (7) on the instrument face plate (22), (9) be the medium temperature key, (10) be the wet-bulb temperature key, (11) be the absolute humidity key, (12) are the relative humidity keys, and a power switch (14) is arranged on (22), power light (13), circuit board and dry cell are contained in the watchcase (23).
Claims (1)
1. the utility model relates to a kind of hygronom, it is a kind of portable microcomputer hygronom that is applicable to commercial production detected gas humidity, it is characterized in that: an airtight cell (24) is arranged at the back side of rectangular parallelepiped watchcase (23), crystal diode (1) is arranged (24), (4), (1) is contained on the base (20), (4) be contained on the base (21), the first half at diode (1) is enclosed within the little spring (17), (17) be with sheet (18) on, on cell (24) outer wall adjacent an aperture is arranged with (18), sealing plug (19) is arranged in the hole, cell (24) has draft tube joint (15), escape pipe joint (16), diode (1) inserts thermometric amplifying circuit (2), diode (4) inserts thermometric amplifying circuit (5), (2) insert analog to digital converter (3), (5) insert analog to digital converter (6), (5), (6) order sheet microcomputer (7), (7) output connects LCD (8), and hygronom panel (22) is gone up dress liquid crystal digital display (8), medium temperature key (9), wet-bulb temperature key (10), absolute humidity key (11), relative humidity key (12), power light (13), power switch (14), dry cell and circuit board are contained in the watchcase (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96245802 CN2300905Y (en) | 1996-11-05 | 1996-11-05 | Portable microcomputer moisture meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96245802 CN2300905Y (en) | 1996-11-05 | 1996-11-05 | Portable microcomputer moisture meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2300905Y true CN2300905Y (en) | 1998-12-16 |
Family
ID=33918720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96245802 Expired - Fee Related CN2300905Y (en) | 1996-11-05 | 1996-11-05 | Portable microcomputer moisture meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2300905Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101497053B (en) * | 2008-01-30 | 2012-12-26 | 三洋电机株式会社 | Thermostatic apparatus and cover |
-
1996
- 1996-11-05 CN CN 96245802 patent/CN2300905Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101497053B (en) * | 2008-01-30 | 2012-12-26 | 三洋电机株式会社 | Thermostatic apparatus and cover |
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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 |