CN206348291U - A kind of humidity sensor circuit - Google Patents
A kind of humidity sensor circuit Download PDFInfo
- Publication number
- CN206348291U CN206348291U CN201621373358.XU CN201621373358U CN206348291U CN 206348291 U CN206348291 U CN 206348291U CN 201621373358 U CN201621373358 U CN 201621373358U CN 206348291 U CN206348291 U CN 206348291U
- Authority
- CN
- China
- Prior art keywords
- resistance
- connection terminal
- sensor circuit
- electric capacity
- humistor
- 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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- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The utility model discloses a kind of humidity sensor circuit, including resistance R101, resistance R102, resistance R103, resistance R104, electric capacity C101, the first connection terminal, the second connection terminal and humistor；The humistor is connected with the first connection terminal, and is connected by first connection terminal with the second connection terminal；Resistance R101 one end is provided with tie point and the second branch road, the tie point is connected with the second connection terminal, second branch road is connected with resistance R102 one end, the resistance R102 is in parallel with resistance R103, resistance R104, tie point after parallel connection is connected with the second connection terminal, the second branch road after parallel connection is connected with electric capacity C101 one end, electric capacity C101 other end ground connection.
Description
Technical field
The utility model is related to sensor circuit field, specifically, is related specifically to a kind of humidity sensor circuit.
Background technology
In order to cost-effective, when sensor circuit is used for MCU, A/D acquisition channels can be saved.This sensor circuit is used
Capacitor charge and discharge carries out simulation A/D collections, essentially identical described in its principle and temperature sensor circuit.Its difference is humidity
The operating voltage of sensor is alternating voltage, and DC component can damage humistor, remove this DC component and be accomplished by
Certain processing is done in program, i.e., after being charged with resistance, need to be put with corresponding resistance once electric.
Utility model content
The purpose of this utility model is for of the prior art not enough there is provided a kind of humidity sensor circuit, to solve
Certainly problems of the prior art.
The technical problem that the utility model is solved can be realized using following technical scheme：
A kind of humidity sensor circuit, including resistance R101, resistance R102, resistance R103, resistance R104, electric capacity C101,
First connection terminal, the second connection terminal and humistor；
The humistor is connected with the first connection terminal, and is connected by first connection terminal and the second connection terminal
Connect；Resistance R101 one end is provided with tie point and the second branch road, and the tie point is connected with the second connection terminal, second
Road is connected with resistance R102 one end, and the resistance R102 is in parallel with resistance R103, resistance R104, it is in parallel after tie point with
Second connection terminal is connected, and the second branch road after parallel connection is connected with electric capacity C101 one end, electric capacity C101 other end ground connection.
Further, the resistance R101, resistance R103 and resistance the R104 other end are respectively connected with an I/O inputs
Mouthful.
Compared with prior art, the beneficial effects of the utility model are as follows：
DC component can be handled, prevent it from damaging humistor.
Brief description of the drawings
Fig. 1 is the schematic diagram of humidity sensor circuit described in the utility model.
Embodiment
To be easy to understand technological means, creation characteristic, reached purpose and effect of the utility model realization, below
With reference to embodiment, the utility model is expanded on further.
Referring to Fig. 1, a kind of humidity sensor circuit described in the utility model, including resistance R101, resistance R102, resistance
R103, resistance R104, electric capacity C101, the first connection terminal, the second connection terminal and humistor；
The humistor is connected with the first connection terminal, and is connected by first connection terminal and the second connection terminal
Connect；Resistance R101 one end is provided with tie point and the second branch road, and the tie point is connected with the second connection terminal, second
Road is connected with resistance R102 one end, and the resistance R102 is in parallel with resistance R103, resistance R104, it is in parallel after tie point with
Second connection terminal is connected, and the second branch road after parallel connection is connected with electric capacity C101 one end, electric capacity C101 other end ground connection.
The resistance R101, resistance R103 and resistance the R104 other end are respectively connected with an I/O input ports.
Resistance R101 is used for controlling humistor to charge, and resistance is generally 2K.Resistance R103 for test mouth resistance, for
Electric capacity discharges, and uses resistance value ratio reference resistance and humistor all small resistance to accelerate the velocity of discharge, resistance generally uses 100
Ω.Resistance R104 is precision resistance, and precision is 1%.Electric capacity C101 is selected generally to use electric capacity 104 by range of readings.Resistance
R102 is used to reduce the Standard resistance range of humistor, and the Standard resistance range of usual humistor is larger, is realized and measured using program hardly possible,
A resistance in parallel, adjusts the Standard resistance range of humistor.
Due to the not powered life-span for being conducive to extending humidity sensor, for RC discharge and recharges, without the use of often by institute
There are I/O mouthfuls to be defined as input.
General principle of the present utility model and principal character and advantage of the present utility model has been shown and described above.One's own profession
The technical staff of industry is it should be appreciated that the utility model is not restricted to the described embodiments, described in above-described embodiment and specification
Simply illustrate principle of the present utility model, on the premise of the utility model spirit and scope are not departed from, the utility model is also
Various changes and modifications are had, these changes and improvements are both fallen within the range of claimed the utility model.The utility model
Claimed scope is by appended claims and its equivalent thereof.
Claims (2)
1. a kind of humidity sensor circuit, it is characterised in that：Including resistance R101, resistance R102, resistance R103, resistance R104,
Electric capacity C101, the first connection terminal, the second connection terminal and humistor；
The humistor is connected with the first connection terminal, and is connected by first connection terminal with the second connection terminal；
Resistance R101 one end is provided with tie point and the second branch road, and the tie point is connected with the second connection terminal, the second branch road
Be connected with resistance R102 one end, the resistance R102 is in parallel with resistance R103, resistance R104, it is in parallel after tie point and the
Two connection terminals are connected, and the second branch road after parallel connection is connected with electric capacity C101 one end, electric capacity C101 other end ground connection.
2. humidity sensor circuit according to claim 1, it is characterised in that：The resistance R101, resistance R103 and electricity
The resistance R104 other end is respectively connected with an I/O input ports.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621373358.XU CN206348291U (en) | 2016-12-14 | 2016-12-14 | A kind of humidity sensor circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621373358.XU CN206348291U (en) | 2016-12-14 | 2016-12-14 | A kind of humidity sensor circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206348291U true CN206348291U (en) | 2017-07-21 |
Family
ID=59321312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621373358.XU Expired - Fee Related CN206348291U (en) | 2016-12-14 | 2016-12-14 | A kind of humidity sensor circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206348291U (en) |
-
2016
- 2016-12-14 CN CN201621373358.XU patent/CN206348291U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20170721 Termination date: 20191214 |