CN201689513U - Image type fire detector - Google Patents
Image type fire detector Download PDFInfo
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- CN201689513U CN201689513U CN2009202848096U CN200920284809U CN201689513U CN 201689513 U CN201689513 U CN 201689513U CN 2009202848096 U CN2009202848096 U CN 2009202848096U CN 200920284809 U CN200920284809 U CN 200920284809U CN 201689513 U CN201689513 U CN 201689513U
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Abstract
The utility model discloses an image type fire detector in the filed of warning devices, which comprises an infrared optical system, an infrared detector, a sampling and amplifying circuit, a memory, a DSP high-speed digital signal processor, a data buffer, an FPGA programmable logic device, a video encoder and a video display. When in working, the temperature signal of an area to be detected is sent to the DSP high-speed digital signal processor for operation processing by utilizing the infrared optical system and the infrared detector; when a fire hazard or a fire happens, an alarm is given, and meanwhile, a real-time image signal loaded with temperature distribution is output to the video display for displaying through the data buffer, the FPGA programmable logic device and the video encoder. Places in which the utility model can be installed are not limited by height, early warning can be realized, and the technical effect of preventing the fire from occurring is achieved.
Description
Technical field
The utility model relates to a kind of safety alarm device, particularly a kind of fire-alarm.
Background technology
Existing fire-alarm, mainly contain two kinds, a kind of is hygrosensor, another kind is the ionic smoke sensor device, these two kinds of fire-alarms are installed the ceiling position under construction usually, and its height is when 6m is following, and fire smoke can very fast arrival ceiling, and spread along ceiling, can detect fire very soon and in time report to the police.And in the large space place because the fire products of combustion is subjected to the influence of spatial altitude and area at spatial transmission, usually when fire development after suitable degree, detector could be responded to, it is difficult to realize the incipient fire warning.Therefore, existing fire-alarm is subjected to the restriction of spatial altitude, high temperature, environmental baseline such as poisonous, explosive, and its application place is limited to.In addition, existing fire detector can only just can trigger alerting signal after breaking out of fire, and it can not be prevented trouble before it happens.
The utility model content
The utility model purpose is to provide a kind of image-type fire detector, makes it pass through infrared acquisition, show in real time the temperature that monitors the place to provide alerting signal before fire takes place, but fire preventing takes place.
For solving above technical matters, the image-type fire detector that the utility model provides comprises
Infrared optical system: survey the infrared image signal that is monitored the zone, focus on the photosurface of infrared eye;
Infrared eye: convert the infrared image signal that detects on the photosurface to electric signal, and give the sampling amplifying circuit with this electrical signal transfer;
Sampling amplifying circuit: convert digital signal to the electric signal amplification of reception and through A/D, pass to the DSP high speed digital signal processor then;
Storer: be used to store operation program and data, and call by the DSP high speed digital signal processor;
DSP high speed digital signal processor: the signal that receives the sampling amplifying circuit, call the program in the storer, through calculation process, the picture signal that is loaded with temperature information is passed to data buffer, simultaneously, judge whether be monitored regional fire the trend of breaking out of fire has taken place or had, and send signal to warning system in real time, the control warning system gives the alarm;
Data buffer: receive the signal that the DSP high speed digital signal processor comes, and temporary;
The FPGA programmable logic device: under sequential control, the temporary image signal data that is loaded with temperature information in the sense data impact damper is exported to video display through video encoder, shows.
In the utility model, infrared optical system is arranged on and is monitored in the zone, is monitored infrared image signal in the zone after system handles, finally shows by video, it can demonstrate and be detected temperature field distribution situation in the zone, so that handle being detected the zone; Simultaneously, the DSP high speed digital signal processor passes to warning system with alerting signal, when breaking out of fire hidden danger or fire, gives the alarm, and reminds the monitor staff to handle.This device can carry out early warning by set different threshold values in program before fire takes place, send alerting signal, reminds the monitor staff to handle, and can eliminate disaster hidden-trouble.Compared with prior art, the restriction that the installable place of the utility model is not subjected to height can realize early warning, reaches the effect that fire preventing takes place.
Further improve as this practicality, this device also includes temperature sensor, when the judgement of DSP high speed digital signal processor reaches setting threshold, described DSP high speed digital signal processor is intermittently surveyed the temperature that is monitored in the zone by temperature sensor, and this temperature signal is passed to memory stores.
Described warning system can adopt following two kinds of technical schemes: one, warning system comprises relay switching circuit and alarm element, that described relay switching circuit receives that the DSP high speed digital signal processor sends is unusual, early warning, fire alarm or fault-signal, and sends the signal controlling alarm element and give the alarm.The DSP high speed digital signal processor directly sends alerting signal to relay switching circuit, and its control is simple, convenient.Its two, described warning system comprises RS485 interface circuit and alarm unit, the DSP high speed digital signal processor passes to alarm unit through data buffer, FPGA programmable logic device, RS485 interface circuit successively with alerting signal, gives the alarm.Give the alarm by the RS485 serial line interface, this mode is mainly used in remote monitoring.Above-mentioned two technical schemes can adopt one of them, also can all adopt, and both are standby each other, can improve the reliability of monitoring.
Further improve as this practicality, also include the fast door motor of control aperture in the described infrared optical system, the DSP high speed digital signal processor is given the shutter motor-drive circuit through MCU power supervisor transfer control signal, by shutter motor-drive circuit control shutter motor action, aperture is compensated adjusting.
Further improve as this practicality, this device also comprises the LED display circuit, described LED display circuit receives that the DSP high-speed digital signal handles send unusually, early warning, fire alarm or fault-signal and make demonstration.
Description of drawings
Fig. 1 is the utility model fundamental diagram.
Embodiment
As shown in the figure, be the fundamental diagram of image-type fire detector, it mainly comprises with the lower part
Infrared optical system: survey the infrared image signal that is monitored the zone, focus on the photosurface of infrared eye;
Infrared eye: convert the infrared image signal that detects on the photosurface to electric signal, and give the sampling amplifying circuit with this electrical signal transfer;
Sampling amplifying circuit: convert digital signal to the electric signal amplification of reception and through A/D, pass to the DSP high speed digital signal processor then;
Storer: be used to store operation program and data, and call by the DSP high speed digital signal processor;
DSP high speed digital signal processor: the signal that receives the sampling amplifying circuit, call the program in the storer, through calculation process, the picture signal that is loaded with temperature information is passed to data buffer, simultaneously, judge whether be monitored regional fire the trend of breaking out of fire has taken place or had, and send signal to warning system in real time, the control warning system gives the alarm;
Data buffer: receive the signal that the DSP high speed digital signal processor comes, and temporary;
The FPGA programmable logic device: under sequential control, the temporary image signal data that is loaded with temperature information in the sense data impact damper is exported to video display through video encoder, shows.
Temperature sensor: when the judgement of DSP high speed digital signal processor reached setting threshold, described DSP high speed digital signal processor was intermittently surveyed the temperature that is monitored in the zone by temperature sensor, and this temperature signal is passed to memory stores.
Warning system: comprise two parts, the warning system of a part comprises relay switching circuit and alarm element, that described relay switching circuit receives that the DSP high speed digital signal processor sends is unusual, early warning, fire alarm or fault-signal, and sends the signal controlling alarm element and give the alarm.The warning system of another part comprises RS485 interface circuit and alarm unit, and the DSP high speed digital signal processor passes to alarm unit through data buffer, FPGA programmable logic device, RS485 interface circuit successively with alerting signal, gives the alarm.Both support mutually, can use simultaneously, also can be standby each other.
Shutter motor-drive circuit: the fast door motor that also includes the control aperture in the described infrared optical system, the DSP high speed digital signal processor is given the shutter motor-drive circuit through MCU power supervisor transfer control signal, by shutter motor-drive circuit control shutter motor action, aperture is compensated adjusting.
LED display circuit: in order to unusual, early warning, the fire alarm or the fault-signal of sending of receiving that the DSP high-speed digital signal handles and make demonstration.
In this device, the signal that the DSP high speed digital signal processor receives is the infrared view signal of monitored area, its calling program carries out computing, carry out treatment for correcting, make the each point in the video display display image corresponding one by one with this temperature of putting corresponding object, its algorithm mainly comprises: Nonuniformity Correction, bad point calibration, with an automatic light meter.
1, Nonuniformity Correction
Owing to be subjected to the limitation of current non-refrigerated infrared detector manufacturing process, each speed of response of surveying unit has inconsistency, the thermal imaging system of not doing Nonuniformity Correction is when uniform target of temperature of observation, meeting spottiness and brightness irregularities phenomenon on the imaging surface, this will influence the particularly observation and the identification of distant object of target.In order to obtain desirable observation recognition effect, need do a series of corrections, i.e. Nonuniformity Correction to original infrared imaging.The homogeneity of the thermal imaging system imaging after the correction significantly strengthens, thereby can increase substantially effective identification and detectivity to target.
2, bad point calibration
So-called " bad point,, it is too high or too low and cause the light and shade spot that occurs on the image to the responsiveness of infrared radiation to be exactly that some of infrared eye correspondence surveyed unit.
It is a relative concept that too high or too low evil idea is counted, and the response normal point relatively on every side that is exactly this light and shade spot is too high or too low, so that observation is exerted an influence, is not respond.The point that has only only a few is real " bad point " less than response.
Bad point is that a coordinate is not with the point of object variations in infrared image.For to being detected the regional better imaging effect that obtains, usually these bad some corresponding response values are put with its on every side some and replaced, by the obviously removal of images light and shade spot influence of bad point calibration, thereby improve picture quality.
3, with an automatic light meter
Brightness, the contrast that is image with an automatic light meter automatically adjusts, and its size of regulating aperture by fast door motor is achieved.
In range of observation, when being detected regional extent and changing, the object of different temperatures has better distinguishable effect in the image in order to make, and wishes usually all temperature values in the image are made a distinction as much as possible.The DSP high speed digital signal processor analyze scene temperature coverage, thereby the brightness and the contrast of regulating image automatically makes the image resolution ratio better effects if by the histogram of statistical picture, helps human eye is distinguished different temperatures by display object.
Show through video display, can show the temperature field distribution situation at each position in monitored place.
The DSP high speed digital signal processor also passes through computing, judged whether that disaster hidden-trouble or fire take place, alarm threshold value can be set by program, when the judgement of DSP high speed digital signal processor reaches setting threshold, described DSP high speed digital signal processor is intermittently surveyed the temperature that is monitored in the zone by temperature sensor, and this temperature signal is passed to memory stores.Storer does not write down temperature measurement data during the normal monitoring state, when monitor temperature reaches setting threshold, by a second record temperature measurement data.As: occur when unusual by 30 seconds record one secondary data, by 5 seconds record one secondary data, by 1 second record one secondary data, thermograph stored in real time when the fire alarm phenomenon occurring when early warning occurring.Can write down 10 seconds temperature measurement data at most after the fire alarm; This device has information record and query function, and warning message record sum is no less than 100, and temperature measurement data record sum is no less than 100.Simultaneously, the DSP high speed digital signal processor passes to relay switching circuit with alerting signal on the one hand, the control alarm element gives the alarm, on the other hand alerting signal is passed to alarm unit through data buffer, FPGA programmable logic device, RS485 interface circuit successively, give the alarm, content can comprise information such as alarm threshold value, warning position (address), warning classification.
The reset signal of whole device can also can be imported by the switch relay circuit by the input of RS485 interface circuit.
Unusual, early warning, fire alarm or the fault-signal that the LED display circuit receives that the DSP high-speed digital signal handles sends also made demonstration.It adopts the yellow indication of fault alarm pilot lamp abnormality, redness (early warning) fire lamp and green relay indicating light, when abnormality or alert status, and the pilot lamp flicker, frequency is 0.2～0.5Hz.When fault alarm or fire alarm, pilot lamp is long bright.
Claims (6)
1. an image-type fire detector is characterized in that comprising
Infrared optical system: survey the infrared image signal that is monitored the zone, focus on the photosurface of infrared eye;
Infrared eye: convert the infrared image signal that detects on the photosurface to electric signal, and give the sampling amplifying circuit with this electrical signal transfer;
Sampling amplifying circuit: convert digital signal to the electric signal amplification of reception and through A/D, pass to the DSP high speed digital signal processor then;
Storer: be used to store operation program and data, and call by the DSP high speed digital signal processor;
The DSP high speed digital signal processor: receive the signal of sampling amplifying circuit, call the program in the storer,, the picture signal that is loaded with temperature information is passed to data buffer through calculation process, and in real time to the warning system signal that gives the alarm;
Data buffer: receive the signal that the DSP high speed digital signal processor comes, and temporary;
The FPGA programmable logic device: under sequential control, the temporary image signal data that is loaded with temperature information in the sense data impact damper is exported to video display through video encoder, shows.
2. image-type fire detector according to claim 1 is characterized in that also including temperature sensor, and the temperature signal that described DSP high speed digital signal processor is intermittently surveyed by temperature sensor passes to memory stores.
3. image-type fire detector according to claim 1 and 2, it is characterized in that described warning system comprises relay switching circuit and alarm element, that described relay switching circuit receives that the DSP high speed digital signal processor sends is unusual, early warning, fire alarm or fault-signal, and sends the signal controlling alarm element and give the alarm.
4. image-type fire detector according to claim 1 and 2, it is characterized in that described warning system comprises RS485 interface circuit and alarm unit, the DSP high speed digital signal processor passes to alarm unit through data buffer, FPGA programmable logic device, RS485 interface circuit successively with alerting signal, gives the alarm.
5. image-type fire detector according to claim 1 and 2, it is characterized in that also including in the described infrared optical system the fast door motor of control aperture, the DSP high speed digital signal processor is given the shutter motor-drive circuit through MCU power supervisor transfer control signal.
6. image-type fire detector according to claim 1 and 2 is characterized in that also comprising the LED display circuit, and unusual, early warning, fire alarm or the fault-signal that described LED display circuit receives that the DSP high-speed digital signal handles sends also made demonstration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202848096U CN201689513U (en) | 2009-12-28 | 2009-12-28 | Image type fire detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202848096U CN201689513U (en) | 2009-12-28 | 2009-12-28 | Image type fire detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201689513U true CN201689513U (en) | 2010-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009202848096U Expired - Lifetime CN201689513U (en) | 2009-12-28 | 2009-12-28 | Image type fire detector |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103247138A (en) * | 2013-05-24 | 2013-08-14 | 成都市晶林科技有限公司 | Infrared imaging lens with LED (Light Emitting Diode) alarm |
| CN107590942A (en) * | 2017-09-22 | 2018-01-16 | 成都市精鹰科技有限公司 | One kind is based on array temperature test type fire alarm and detection method |
| CN107861034A (en) * | 2017-10-25 | 2018-03-30 | 国网湖南省电力公司 | Arrester based on image synthesis, defects of insulator infrared imaging detection determination methods |
| CN112242038A (en) * | 2020-08-24 | 2021-01-19 | 烟台艾睿光电科技有限公司 | Fire situation determination method, device, equipment and computer readable storage medium |
-
2009
- 2009-12-28 CN CN2009202848096U patent/CN201689513U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103247138A (en) * | 2013-05-24 | 2013-08-14 | 成都市晶林科技有限公司 | Infrared imaging lens with LED (Light Emitting Diode) alarm |
| CN107590942A (en) * | 2017-09-22 | 2018-01-16 | 成都市精鹰科技有限公司 | One kind is based on array temperature test type fire alarm and detection method |
| CN107590942B (en) * | 2017-09-22 | 2019-10-18 | 成都市精鹰科技有限公司 | One kind being based on array temperature test type fire alarm and detection method |
| CN107861034A (en) * | 2017-10-25 | 2018-03-30 | 国网湖南省电力公司 | Arrester based on image synthesis, defects of insulator infrared imaging detection determination methods |
| CN112242038A (en) * | 2020-08-24 | 2021-01-19 | 烟台艾睿光电科技有限公司 | Fire situation determination method, device, equipment and computer readable storage medium |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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Granted publication date: 20101229 |
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| CX01 | Expiry of patent term |