CN202330330U - Gas dew point measuring device based on humiture detection - Google Patents
Gas dew point measuring device based on humiture detection Download PDFInfo
- Publication number
- CN202330330U CN202330330U CN2011205215251U CN201120521525U CN202330330U CN 202330330 U CN202330330 U CN 202330330U CN 2011205215251 U CN2011205215251 U CN 2011205215251U CN 201120521525 U CN201120521525 U CN 201120521525U CN 202330330 U CN202330330 U CN 202330330U
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- CN
- China
- Prior art keywords
- dew point
- chip microcomputer
- gas dew
- humiture
- humidity
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Abstract
The utility model relates to a gas dew point measuring device based on humiture detection. When the humidity of air drops to a dew point, water vapour in air is condensed into dew, and if the dew point is below 0 DEG C, when the air temperature drops to the dew point, the water vapour can be directly condensed and frosted. The gas dew point measuring device based on humiture detection comprises a shell (1), wherein the shell is internally provided with a moisture measurement instrument (2) and a temperature measuring instrument (3), the moisture measurement instrument and the temperature measuring instrument are connected with a singlechip (4) type 89S51, and the singlechip is connected with a display alarm device (5); and a power supply (6) is connected with the singlechip, and a control key (7) is connected with the singlechip. The gas dew point measuring device provided by the utility model is used for commercial measurement.
Description
Technical field:
the utility model relates to a kind of apparatus of field of measurement, is specifically related to a kind of gas dew point measurement mechanism that detects based on humiture.
Background technology:
are in electronics industry, petrochemical complex, pharmacy and other production runes; Along with the raising of product quality and continuing to bring out of new high-tech product; Process conditions to humidity require increasingly high; The detection of humidity and control also more and more receive people's attention, and Humidity Detection is control of gas or compressed air quality grade and the important step of improving air supply system, so the precision measurement of learning gas dew point is significant.
because the humidity of air when dropping to dew point, airborne water vapour just condenses into dew; If dew point is below 0 ℃, when temperature dropped to dew point so, water vapour will directly condense into frost.
Summary of the invention:
The purpose of
the utility model provide a kind of can long-distance transmissions and the gas dew point measurement mechanism that detects based on humiture of monitoring.
Above-mentioned purpose realizes through following technical scheme:
a kind of gas dew point measurement mechanism that detects based on humiture; Its composition comprises: housing; Humidity measuring apparatus and temperature measuring set are housed in the described housing, and described humidity measuring apparatus is connected single-chip microcomputer with described temperature measuring set, and described single-chip microcomputer connects displaying alarm; Power supply connects described single-chip microcomputer, and operating key connects described single-chip microcomputer.
described gas dew point measurement mechanism that detects based on humiture, described single-chip microcomputer comprises expanding system and configuration-system, described configuration-system comprises keyboard, display, converter and D/A converter.
described gas dew point measurement mechanism that detects based on humiture, described humidity measuring apparatus is the macromolecule membrane capacitive humidity sensor.
Beneficial effect:
1. the single-chip microcomputer that uses of the utility model can be directly and the modulate circuit of sensor join; Real-time processing data; In addition because the volume of integrated temperature sensor is little; Can be welded on place, thereby the thermograde of measurement point can be ignored basically near humidity sensor.
The single-chip microcomputer thermal capacity that
the utility model uses is very little, and response speed is fast; And the measuring method of humidity, temperature is various informative, and precision can reach requirement within the specific limits, low price, and real-time is good; Thereby the testing result of using relative humidity converts dewpoint temperature to then to be prone to realize.
The expanding system and the peripheral configuration-system of
the utility model have fully satisfied the functional requirement of application system, and leave suitable leeway, can carry out secondary development.
The broad quantum of the macromolecule membrane capacitive humidity sensor that
the utility model adopts, range is 0～100%, can satisfy the needs that varying environment is measured; Precision is higher; Volume is little, is convenient to industrial pipeline and installs; Reasonable price.
5. the utility model are the corresponding frequencies signal with the change transitions of sensor capacitance, and directly the input single-chip microcomputer is measured after simple process; The antijamming capability of frequency signal output can raising signal is suitable for long-distance transmissions and monitoring especially.
The temperature sensor that
the utility model adopts is the voltage range that temperature sensor single wire digital DS18B20 supports 3V～5.5V, makes system design more flexibly, conveniently, and more cheap, and volume is littler.
Description of drawings:
accompanying drawing 1 is the structural representation of this product.
accompanying drawing 2 is multi-resonant oscillating circuit figure in the accompanying drawing 1.
accompanying drawing 3 is monostalbe trigger circuit diagrams in the accompanying drawing 1.
accompanying drawing 4 are accompanying drawings 1 with accompanying drawing 2 in the CC figure of multivibrator and single-chip microcomputer.
Embodiment:
Embodiment 1:
a kind of gas dew point measurement mechanism that detects based on humiture; Its composition comprises: housing 1; Humidity measuring apparatus 2 and temperature measuring set 3 are housed in the described housing, and described humidity measuring apparatus is connected single-chip microcomputer 4 model 89S51 with described temperature measuring set, and described single-chip microcomputer connects displaying alarm 5; Power supply 6 connects described single-chip microcomputer, and operating key 7 connects described single-chip microcomputer.
Embodiment 2:
embodiment 1 described gas dew point measurement mechanism that detects based on humiture, described single-chip microcomputer comprises expanding system and configuration-system, described configuration-system comprises keyboard, display, converter and D/A converter.
Embodiment 3:
embodiment 1 described gas dew point measurement mechanism that detects based on humiture, described humidity measuring apparatus is the macromolecule membrane capacitive humidity sensor.
Embodiment 4:
embodiment 1 or the 2 or 3 described gas dew point measurement mechanisms that detect based on humiture; The added test voltage of described macromolecule membrane humidity sensor can not be too high DC voltage and add the influence of test frequency to humidity sensor, designed the signal conditioning circuit that constitutes by 555 timers and carried out the corresponding signal conversion.As long as the multi-resonant oscillating circuit adjustment is proper, its output is just linear with rh value.The transmitter compact overall structure, volume is very little, and output signal antijamming capability is strong, is convenient to the distant signal transmission.Convert the appearance value of senser element into relation that frequency signal and humidity change with the relation of the variation of humidity through circuit, respectively with frequency measurement or survey Zhou Fangfa and handle, finally obtain humidity value according to the frequency size.
555 time base circuits comprise monostalbe trigger or multivibrator.Multivibrator is a continuous wave, can directly adopt its incoming frequency of single chip computer measurement.Confirm the value of capacitor C.Guaranteed the continuity of signals collecting like this, measuring error only is a square-wave cycle.And monostable circuit is when trigger pip is arranged, and just has the output of temporary stable state, and the output time of this temporary stable state is by the value decision of R, C.
Embodiment 5:
embodiment 1 or the 2 or 3 described gas dew point measurement mechanisms that detect based on humiture, described temperature sensor are 1-wire digital temperature sensor DS18B20 with program setting is 9～12 resolution, and precision is ± 0.5 ℃.Optional littler packaged type, the wideer voltage scope of application.Resolution setting, and the alarm temperature that the user sets is stored among the EEPROM preservation still after the power down.
DS18B20 inner structure mainly is made up of four parts: 64 photoetching ROM, temperature sensor, non-volatile temperature alarming trigger TH and TL, configuration register.
The output valve of
is one 9 a binary numeral, and its temperature-measuring range is between-55 ℃～125 ℃, and when temperature value during-10 ℃～85 ℃ scopes, error is ± 0.5 ℃.Its convenience is the one-wire interface design, makes processor only need connect a data line and just can carry out whole operations to it, realizes the transmission of operational order and measurement data.Each sheet DS18B20 has a unique sequence code, so a plurality of device can be connected on same the data line of processor, saves processor resource, helps the realization of multipoint temperature measuring simultaneously.
Embodiment 6:
embodiment 1 or the 2 or 3 described gas dew point measurement mechanisms that detect based on humiture; Described single-chip microcomputer 89S51; ISP online programming function, the advantage of this function are to rewrite the interior program of single-chip microcomputer storer and need from working environment, peel off chip.It is a powerful easy-to-use function.
frequency of operation is 33MHz, and the working frequency limit of 89C51 has only 24M as you know, and S51 has more high workload frequency in other words, thereby has had computing velocity faster.Has duplexing UART serial-port.Inner integrated Watch Dog Timer, no longer need be as 89C51 external Watch Dog Timer element circuit.The Double Data indicator.The power-off sign.
Claims (3)
1. gas dew point measurement mechanism that detects based on humiture; Its composition comprises: housing; It is characterized in that: humidity measuring apparatus and temperature measuring set are housed in the described housing, and described humidity measuring apparatus is connected single-chip microcomputer with described temperature measuring set, and described single-chip microcomputer connects displaying alarm; Power supply connects described single-chip microcomputer, and operating key connects described single-chip microcomputer.
2. the gas dew point measurement mechanism that detects based on humiture according to claim 1, it is characterized in that: described single-chip microcomputer comprises expanding system and configuration-system, described configuration-system comprises keyboard, display, converter and D/A converter.
3. the gas dew point measurement mechanism that detects based on humiture according to claim 1 and 2, it is characterized in that: described humidity measuring apparatus is the macromolecule membrane capacitive humidity sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205215251U CN202330330U (en) | 2011-12-14 | 2011-12-14 | Gas dew point measuring device based on humiture detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205215251U CN202330330U (en) | 2011-12-14 | 2011-12-14 | Gas dew point measuring device based on humiture detection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202330330U true CN202330330U (en) | 2012-07-11 |
Family
ID=46442306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205215251U Expired - Fee Related CN202330330U (en) | 2011-12-14 | 2011-12-14 | Gas dew point measuring device based on humiture detection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202330330U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105651811A (en) * | 2016-01-21 | 2016-06-08 | 北京航空航天大学 | Device for measuring and controlling dew point temperature and implementation method thereof |
| CN109540966A (en) * | 2018-12-27 | 2019-03-29 | 上海伦仕智能科技有限公司 | Dew point transmitter |
| CN112666217A (en) * | 2020-11-10 | 2021-04-16 | 西安交通大学 | Capacitive dew point monitoring device and method |
-
2011
- 2011-12-14 CN CN2011205215251U patent/CN202330330U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105651811A (en) * | 2016-01-21 | 2016-06-08 | 北京航空航天大学 | Device for measuring and controlling dew point temperature and implementation method thereof |
| CN105651811B (en) * | 2016-01-21 | 2019-01-18 | 北京航空航天大学 | A kind of device and its implementation of measurement and control dew-point temperature |
| CN109540966A (en) * | 2018-12-27 | 2019-03-29 | 上海伦仕智能科技有限公司 | Dew point transmitter |
| CN112666217A (en) * | 2020-11-10 | 2021-04-16 | 西安交通大学 | Capacitive dew point monitoring device and method |
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Legal Events
| 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: 20120711 Termination date: 20121214 |