CN85204022U - Fire alarm device - Google Patents
Fire alarm device Download PDFInfo
- Publication number
- CN85204022U CN85204022U CN 85204022 CN85204022U CN85204022U CN 85204022 U CN85204022 U CN 85204022U CN 85204022 CN85204022 CN 85204022 CN 85204022 U CN85204022 U CN 85204022U CN 85204022 U CN85204022 U CN 85204022U
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- detecting
- testing circuit
- temperature
- circuit
- fire alarm
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- 230000009977 dual effect Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract 1
- 239000000779 smoke Substances 0.000 abstract 1
- 206010037660 Pyrexia Diseases 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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Abstract
The utility model discloses a fire alarm device capable of alarming according to temperature, brightness, the concentration of the combustible gas or the concentration of the smoke and capable of alarming according to any one of combinations. The information of the temperature or the brightness forecasts the difference value between the detected place and the environment of the detected place, and the detecting circuit of the fire alarm device can be a double-input differential type, adopting a constant-current power source so as to make the detected value of the detecting circuit be only relevant to a resistance value. Thus, the utility model has the advantages of multi-parameter input, differential type detection, good reliability, high detecting precision +-0.2DEG. C, etc. The device can also be used for detecting the temperature rise of the easy-heat equipment or the stored material, if the device is provided with other members, the device can also be used for detecting any one physical quantity and conducting the over-limit alarm.
Description
Fire-alarm, the method that its available multiparameter detects is widely used in the fire forecast of large, medium and small unit, factories and miness.
Existing fire-alarm is made up of sensing element, testing circuit and warning circuit.Sensing element wherein, the employing thermistor that has is as temperature-sensing element, and the employing gas sensing resistance that has promptly all is the form of single input physical quantity as combustible gas concentration sensing element, and its testing circuit is the bridge circuit of single input form.Shortcoming is: do not consider that the thermal conversion situation between measurement point and its surrounding environment is a radiating condition, can not be used to detect the temperature rise of easy hot equipment or article certainly, thereby poor reliability, the scope of application is little.
The objective of the invention is to become the form of single input physical quantity and be the form (or form of title multi-parameter) of many input physical quantitys, the testing circuit of every kind of physical quantity is also changed into the differential type testing circuit of dual input by single input form, in order to fundamentally improve the reliability of fire-alarm.
The present invention is a kind of multiparameter fire-alarm of differential type, and its detects is temperature difference or luminance difference between measured point and the environment, and it is not only by temperature, also can come comprehensive detection and reports to the police by combustible gas concentration around brightness, the measured point or smokescope.Its used testing circuit is the differential type testing circuit of thermal type or luminance difference formula, can add the testing circuit of combustable gas concentration or smokescope again, also can be any combination between them.Its testing circuit also must be the dual input formula, and promptly input is the temperature difference or the luminance difference of two different measuring points; And its usefulness is constant-current supply, make detected value only relevant with resistance value.
Fire-alarm good reliability of the present invention, the accuracy of detection height, the scope of application is big, and it not only can be used for the fire alarm of inflammable equipment such as transformer, motor, also can be used for detecting the temperature rise of stock in storages such as grain, fruit.As mix corresponding sensitive element, also can be used for detecting any physical quantity, and carry out off-limit alarm simultaneously.If mix Digital Detecting and the display unit that has binary-coded decimal, can also connect with microcomputer, realize the intellectual monitoring and the warning of robotization.
Description of drawings:
Accompanying drawing: fire-alarm block diagram
1---temperature difference sensing element;
2---temperature difference testing circuit;
3---the luminance difference sensing element;
4---the luminance difference testing circuit;
5---combustible gas concentration sensing element;
6---combustible gas concentration testing circuit;
7---the smokescope sensing element;
8---the smokescope testing circuit;
9---audible-visual annunciator;
10---analog display circuit;
11---scan tester;
12---digital display circuit;
13---constant-current supply.
Embodiment:
What temperature-sensing element was used is metal fever resistance, and what the brightness sensing element was used is photoresistance; Combustible gas concentration detects with gas sensing resistance, smokescope detects with photoelectric sensor, testing circuit unit 2, unit 4, unit 6, unit 8 all are to be made of differential operational amplifier, the output of their electrical signal form, all deliver to scan tester and carry out multi channel selecting, show so that periodically pointwise is touring.Display unit has two: analog display circuit and digital display circuit, display circuit be can be with binary-coded decimal digital, the constant-current supply that is adopted is made of binary channels formula operational amplifier.What audible-visual annunciator was used is general Si Mite (Smitt) trigger circuit.By the fire-alarm that above-mentioned each parts constitute, the detection range of its temperature rise and alarm range can be selected in 0～600 ℃ of scope as required, and precision can reach ± and 0.2 ℃.
Claims (1)
1, fire-alarm, generally form by sensing element, testing circuit, display circuit and warning circuit, the invention is characterized in, testing circuit is to use differential type dual input testing circuit thermal type or the luminance difference formula of constant-current supply, also can add the testing circuit of combustible gas concentration or smokescope, also can be any combination between them.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85204022 CN85204022U (en) | 1985-09-29 | 1985-09-29 | Fire alarm device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85204022 CN85204022U (en) | 1985-09-29 | 1985-09-29 | Fire alarm device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN85204022U true CN85204022U (en) | 1986-10-29 |
Family
ID=4799435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 85204022 Ceased CN85204022U (en) | 1985-09-29 | 1985-09-29 | Fire alarm device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85204022U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8551665B2 (en) | 2007-02-09 | 2013-10-08 | Daimler Ag | Supply system and warning device for a fuel cell stack and method for controlling the supply system |
| CN108269397A (en) * | 2017-12-27 | 2018-07-10 | 深圳市元征软件开发有限公司 | The processing method and mobile unit of a kind of highway traffic data |
| CN109213238A (en) * | 2018-09-20 | 2019-01-15 | 合肥霞康电子商务有限公司 | A kind of education classroom environment monitoring system |
-
1985
- 1985-09-29 CN CN 85204022 patent/CN85204022U/en not_active Ceased
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8551665B2 (en) | 2007-02-09 | 2013-10-08 | Daimler Ag | Supply system and warning device for a fuel cell stack and method for controlling the supply system |
| CN108269397A (en) * | 2017-12-27 | 2018-07-10 | 深圳市元征软件开发有限公司 | The processing method and mobile unit of a kind of highway traffic data |
| WO2019128027A1 (en) * | 2017-12-27 | 2019-07-04 | 深圳市元征软件开发有限公司 | Road traffic data processing method and vehicle-mounted device |
| CN109213238A (en) * | 2018-09-20 | 2019-01-15 | 合肥霞康电子商务有限公司 | A kind of education classroom environment monitoring system |
| CN109213238B (en) * | 2018-09-20 | 2020-12-11 | 深圳市安之源电子有限公司 | Classroom environment monitoring system for education |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CE01 | Termination of patent right |