CN207923767U - A kind of hygrometer - Google Patents
A kind of hygrometer Download PDFInfo
- Publication number
- CN207923767U CN207923767U CN201721795348.XU CN201721795348U CN207923767U CN 207923767 U CN207923767 U CN 207923767U CN 201721795348 U CN201721795348 U CN 201721795348U CN 207923767 U CN207923767 U CN 207923767U
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- China
- Prior art keywords
- module
- hygrometer
- connect
- oscillation
- resistance
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Abstract
The utility model discloses a kind of hygrometers, including power module, oscillation module, detection module, rectification module and microampere gauge outfit PA；The power module is connect with the oscillation module；The oscillation module is connect with the detection module, the oscillation module respectively；The detection module is connect with the rectification module；The rectification module is connect with the microampere gauge outfit PA；The detection module includes resistance R6, resistance R7, potentiometer RP, humistor RH and switch SA；Circuit is in correction mode when the switch SA sets 2, so that hygrometer is reset by adjusting the potentiometer RP.The utility model is provided with humidity correcting link, by the adjustment of potentiometer RP and resistance R7, so that the accuracy of hygrometer is always maintained at as before, the accuracy of hygrometer will not be made to be gradually reduced with the aging of component；The utility model is simple in structure, and power consumption is relatively low, and humidity display is intuitive, has preferable cost performance, is conducive to large-scale production, promotes.
Description
Technical field
The utility model is related to arrive environmental testing more particularly to a kind of hygrometer.
Background technology
Moisture measurement technology cause is for a long time.With the development of electronic technology, there has also been development at full speed for modern age measuring technique.
Moisture measurement divides two from principle, as many as 30 kind.There is absolute humidity, relative humidity, dew point, wet to the representation method of humidity
The ratio of gas and dry gas（Weight or volume）Etc., it is not accurate enough in the prevalence of measurement accuracy in terms of moisture measurement at present, and
The problem of precision constantly declines over time, therefore, the prior art is defective, needs to improve.
Utility model content
The utility model provides a kind of hygrometer, the not accurate enough problem of measurement accuracy of solution.
To solve the above problems, the technical scheme that the utility model is provided is as follows：
A kind of hygrometer, including power module, oscillation module, detection module, rectification module and microampere gauge outfit PA；The electricity
Source module is connect with the oscillation module；The oscillation module is connect with the detection module, the oscillation module respectively；It is described
Detection module is connect with the rectification module；The rectification module is connect with the microampere gauge outfit PA；The detection module includes
Resistance R6, resistance R7, potentiometer RP, humistor RH and switch SA；Circuit is in correction mode when the switch SA sets 2, leads to
It crosses and adjusts the potentiometer RP hygrometer is made to reset.
Preferred technical solution, circuit is in measurement pattern when the switch SA sets 1, is carried out by the humistor RH
Moisture measurement.
Preferred technical solution, the scale of the microampere gauge outfit PA are used for showing surveyed humidity.
Preferred technical solution, the rectification module include by diode VD1, diode VD2, diode VD3, diode
The full-wave rectifier of VD4 compositions；The full-wave rectifier can ensure that its output is direct current.
Preferred technical solution, the oscillation module include triode VT2；The effect of the oscillation module is described three
1 ~ 10HZ very low frequency signals are generated on the collector of pole pipe VT2.
Preferred technical solution, the power module are composed in series by power supply E and switch S；The power supply E is DC9V.
Advantageous effect compared with the existing technology is that using the above scheme, the utility model is provided with humidity correcting link,
By the adjustment of potentiometer RP and resistance R7, the accuracy of hygrometer is made to be always maintained at as before, it will not be with the aging of component
And the accuracy of hygrometer is made to be gradually reduced；The utility model is simple in structure, and power consumption is relatively low, and humidity display is intuitive, has preferable
Cost performance, be conducive to large-scale production, promote.
Description of the drawings
Illustrate embodiment or technical solution in the prior art in order to clearer, it below will be to embodiment or the prior art
The required attached drawing used is briefly described in description, it is clear that, the accompanying drawings in the following description is only the one of utility model
A little embodiments for those of ordinary skill in the art without creative efforts, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is a kind of hygrometer circuit diagram of the utility model.
Specific implementation mode
For the ease of understanding the utility model, in the following with reference to the drawings and specific embodiments, the utility model is carried out more detailed
Thin explanation.The preferred embodiment of the utility model is given in attached drawing.But the utility model can be with many different
Form is realized, however it is not limited to this specification described embodiment.Make to this on the contrary, purpose of providing these embodiments is
The understanding of the disclosure of utility model is more thorough and comprehensive.
It should be noted that when element is referred to as " being fixed on " another element, it can be directly on another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.Term used in this specification " fixation ", " integrated molding ",
For illustrative purposes only, the similar unit of structure is to identical label in the figure for "left", "right" and similar statement
Mark.
Unless otherwise defined, technical and scientific term all used in this specification and the skill for belonging to the utility model
The normally understood meaning of technical staff in art field is identical.Art used in the description of the utility model in this specification
Language, which is only for the purpose of describing specific embodiments, is not intended to limitation the utility model.
As shown in Figure 1, one embodiment of the utility model is：
A kind of hygrometer, including power module, oscillation module, detection module, rectification module and microampere gauge outfit PA；The electricity
Source module is connect with the oscillation module；The oscillation module is connect with the detection module, the oscillation module respectively；It is described
Detection module is connect with the rectification module；The rectification module is connect with the microampere gauge outfit PA；The detection module includes
Resistance R6, resistance R7, potentiometer RP, humistor RH and switch SA；Circuit is in correction mode when the switch SA sets 2, leads to
It crosses and adjusts the potentiometer RP hygrometer is made to reset.
Further, circuit is in measurement pattern when the switch SA sets 1, and humidity survey is carried out by the humistor RH
Amount.
Further, the scale of the microampere gauge outfit PA is used for showing surveyed humidity.
Further, the rectification module includes by diode VD1, diode VD2, diode VD3, diode VD4 groups
At full-wave rectifier；The full-wave rectifier can ensure that its output is direct current；The rectification module further include capacitance C3,
Capacitance C4, resistance R8；The capacitance C3 is connected to the output end of the full-wave rectifier；The capacitance C3 is connected to the microampere
The both ends of gauge outfit PA.
Further, the oscillation module includes triode VT2；The effect of the oscillation module is in the triode
1 ~ 10HZ very low frequency signals are generated on the collector of VT2；The oscillation module further includes resistance R1, resistance R2, resistance R3, resistance
R4, resistance R5, capacitance C1, capacitance C2 and triode VT1；The triode VT1, triode VT2 form astatic multivibrator；
The first end of the resistance R5 respectively with the first end of the resistance R1, the collection of the anode of the capacitance C1, uncle's triode VT1
Electrode connects；The second end of the resistance R5 is connect with the anode of the cathode of the diode VD2, the diode VD4 respectively.
Further, the power module is composed in series by power supply E and switch S；The power supply E is DC9V；The power supply E
Cathode connect respectively with the emitter of the triode VT1, the emitter of the triode VT2, the potentiometer RP.
The operation principle of the utility model is：
In circuit, at work, triode VT1, VT2's astatic multivibrator of triode VT1, VT2 composition satisfy in turn
With conducting and cut-off.It is appropriate choose resistance R2, R3 or capacitance C1, C2 can generate 1 on the collector of V T2 of triode~
10Hz very low frequencys exchange（Square wave）Signal, and it is transported to by resistance R6, potentiometer RP the lower end of humistor RH；Work as switch
When SA is allocated to " 1 " measurement pattern, the alternating current of triode VT2 collectors will pass through resistance R6, potentiometer RP, humistor
RH, switch SA, bridge rectifier VD1~VD4 and resistance R5；When switch SA is allocated to " 2 " correction mode, triode VT2 current collections
The alternating current of pole will pass through resistance R6, potentiometer RP, resistance R7, switch SA to bridge rectifier VD1~VD4, pass through current potential
The adjustment of device RP makes hygrometer reset, and the resistance value of potentiometer is most accurate for the display of hygrometer at this time.Bridge rectifier
It is full-wave rectifier, no matter which end of input terminal is negative, alternating current can be rectified into DC current；Direct current after rectification
Stream becomes stable DC stream, is added on microampere gauge outfit PA after resistance R8 and capacitance C3, C4 filtering.Since air is opposite
Humidity is different, and the resistance value that humistor RH is presented also changes therewith, and the current value size of microampere gauge outfit PA is flowed through after rectification also
Change therewith, air humidity can intuitively be read by then passing through PA scales.
It should be noted that above-mentioned each technical characteristic continues to be combined with each other, the various embodiments not being enumerated above are formed,
It is accordingly to be regarded as the range of the utility model specification record；Also, it for those of ordinary skills, can be according to above stating
It is bright to be improved or converted, and all these modifications and variations should all belong to the protection model of the appended claims for the utility model
It encloses.
Claims (6)
1. a kind of hygrometer, including power module, oscillation module, detection module, rectification module and microampere gauge outfit PA；The power supply
Module is connect with the oscillation module；The oscillation module is connect with the detection module, the oscillation module respectively；The inspection
Module is surveyed to connect with the rectification module；The rectification module is connect with the microampere gauge outfit PA；It is characterized in that, the detection
Module includes resistance R6, resistance R7, potentiometer RP, humistor RH and switch SA；Circuit is in correction when the switch SA sets 2
Pattern makes hygrometer reset by adjusting the potentiometer RP.
2. hygrometer according to claim 1, which is characterized in that circuit is in measurement pattern when the switch SA sets 1, leads to
It crosses the humistor RH and carries out moisture measurement.
3. hygrometer according to claim 1, which is characterized in that the scale of the microampere gauge outfit PA, which is used for showing, to be surveyed
Humidity.
4. hygrometer according to claim 1, which is characterized in that the rectification module includes by diode VD1, diode
The full-wave rectifier of VD2, diode VD3, diode VD4 compositions；The full-wave rectifier can ensure that its output is direct current.
5. hygrometer according to claim 1, which is characterized in that the oscillation module includes triode VT2；The oscillation
The effect of module is generation 1 ~ 10HZ very low frequency signals on the collector of the triode VT2.
6. hygrometer according to claim 1, which is characterized in that the power module is by power supply E and switch S concatenation groups
At；The power supply E is DC9V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721795348.XU CN207923767U (en) | 2017-12-20 | 2017-12-20 | A kind of hygrometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721795348.XU CN207923767U (en) | 2017-12-20 | 2017-12-20 | A kind of hygrometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207923767U true CN207923767U (en) | 2018-09-28 |
Family
ID=63607406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721795348.XU Expired - Fee Related CN207923767U (en) | 2017-12-20 | 2017-12-20 | A kind of hygrometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207923767U (en) |
-
2017
- 2017-12-20 CN CN201721795348.XU patent/CN207923767U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180928 Termination date: 20201220 |