CA2084325A1 - Circuit for humidity detection - Google Patents
Circuit for humidity detectionInfo
- Publication number
- CA2084325A1 CA2084325A1 CA 2084325 CA2084325A CA2084325A1 CA 2084325 A1 CA2084325 A1 CA 2084325A1 CA 2084325 CA2084325 CA 2084325 CA 2084325 A CA2084325 A CA 2084325A CA 2084325 A1 CA2084325 A1 CA 2084325A1
- Authority
- CA
- Canada
- Prior art keywords
- circuit
- bridge circuit
- resistance
- series
- junction
- 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.)
- Granted
Links
Abstract
The present invention is to provide a circuit for detecting humidity in which occurrence of the temperature drift can be inhibited by a simple means and therefore which is able to detect humidity precisely without regard to the temperature of the atmosphere. In a humidity detection circuit including a bridge circuit containing temperature elements, the bridge circuit is connected with a series of a third resistance R3, a current controlling element and a power supply in this order, while a series of fourth and fifth resistances R4 and R5 is arranged in parallel with the series of the R3 and the bridge circuit.
In addition a junction between R4 and R5 and another junction between R3 and the bridge circuit are connected separately to a voltage comparing circuit, the output of which is inputted into the current controlling element. In this arrangement, a control section is provided to detect the potential of the junction between the bridge circuit and the third resistance R3. The humidity detection circuit, based upon the detected potential, changes the resistance value of resistance R5 to an optimum level at which the temperature drift does not occur.
In addition a junction between R4 and R5 and another junction between R3 and the bridge circuit are connected separately to a voltage comparing circuit, the output of which is inputted into the current controlling element. In this arrangement, a control section is provided to detect the potential of the junction between the bridge circuit and the third resistance R3. The humidity detection circuit, based upon the detected potential, changes the resistance value of resistance R5 to an optimum level at which the temperature drift does not occur.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33171491A JP3404757B2 (en) | 1991-12-16 | 1991-12-16 | Image forming method |
| JP3331715A JP2547362B2 (en) | 1991-12-16 | 1991-12-16 | Replaceable artificial grass structure for stadiums with natural grass |
| JP3-351714/1991 | 1991-12-16 | ||
| JP3-351715/1991 | 1991-12-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2084325A1 true CA2084325A1 (en) | 1993-06-17 |
| CA2084325C CA2084325C (en) | 1996-12-17 |
Family
ID=26573942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2084325 Expired - Fee Related CA2084325C (en) | 1991-12-16 | 1992-12-02 | Circuit for humidity detection |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2084325C (en) |
-
1992
- 1992-12-02 CA CA 2084325 patent/CA2084325C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2084325C (en) | 1996-12-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |