CN100568307C - Large-depth space temperature field detecting and fire disaster alarming device - Google Patents
Large-depth space temperature field detecting and fire disaster alarming device Download PDFInfo
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- CN100568307C CN100568307C CNB2008100327910A CN200810032791A CN100568307C CN 100568307 C CN100568307 C CN 100568307C CN B2008100327910 A CNB2008100327910 A CN B2008100327910A CN 200810032791 A CN200810032791 A CN 200810032791A CN 100568307 C CN100568307 C CN 100568307C
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Abstract
A kind of large-depth space temperature field detecting and fire disaster alarming device, comprise that laser controller, laser with fixed wavelength, wavelength selectivity are unidirectional by module, multichannel photoswitch, many transmission temperature-sensitive optical cables, photoelectric commutator, signal processing module, wherein, described wavelength selectivity is unidirectional to be accepted the input laser of described laser with fixed wavelength and exports described multichannel photoswitch to by module, and accept described multichannel photoswitch input the back scattering light signal and export this back scattering light signal to described photoelectric commutator; Electric signal after described photoelectric commutator will be changed exports described signal processing module to; Described signal processing module judges whether to reach predefined temperature alarming threshold value and temperature rise rate alarm threshold value according to the space temperature that calculates.The invention provides technical scheme, can measure large-depth space temperature field institute, it is simple to have a networking, only need lay corresponding temperature-sensitive optical cable as required and get final product, and it is low to have a cost, the advantage that reliability is high.
Description
Technical field
The present invention relates to temperature detection, fire alarm field, be specifically related to the Detection And Warning technology of space temperature field.
Background technology
Development along with human exploit society, temperature detection and fire alarm technical development based on demand for security are rapid, traditional temperature Detection Techniques such as alcohol thermometer, mercury temperature are taken into account various industrial electric thermo-couple temperature detectors, single-chip microcomputer temperature sensor etc., very ripe, but they all are the point type detections, promptly can only point of space exploration.Even form network structure by a plurality of sensing points, as carry out the large space scope and go into temperature field situation in vcehicular tunnel, the cable duct, the detection of the temperature conditions that high-tension cable is along the line, required detection is counted very huge, thereby make very difficulty of networking, poor reliability is looked over one's shoulder the traditional temperature detection means of the axial temperature situation of high voltage power transmission cable with powerless for needs.
Summary of the invention
The objective of the invention is to, a kind of device that can measure large-depth space temperature field and fire alarm is provided.
The present invention adopts following technical scheme:
A kind of large-depth space temperature field detecting and fire disaster alarming device comprise that laser controller, laser with fixed wavelength, wavelength selectivity are unidirectional by module, multichannel photoswitch, many transmission temperature-sensitive optical cables, photoelectric commutator, signal processing module, wherein,
Described laser controller is connected with described laser with fixed wavelength, and described laser controller produces control signal, makes laser with fixed wavelength output laser pulse string, the width and the frequency adjustable of the laser pulse string of described laser with fixed wavelength output;
Described wavelength selectivity is unidirectional to be connected with described laser with fixed wavelength, described photoelectric commutator and described multichannel photoswitch by module, accept the input laser of described laser with fixed wavelength and export described multichannel photoswitch to, and accept described multichannel photoswitch input the back scattering light signal and export this back scattering light signal to described photoelectric commutator;
Described multichannel photoswitch is connected with many transmission temperature-sensitive optical cables, be used for giving described many transmission temperature-sensitive optical cables, and the rear orientation light that will carry temperature information is back to the unidirectional module of passing through of wavelength selectivity along transmission temperature-sensitive optical cable with unidirectional road optical signal transmission of wavelength selectivity by module input;
Described many transmission temperature-sensitive optical cables are used to form space temperature temperature-sensitive network;
Described photoelectric commutator is connected with described signal processing module, and the rear orientation light conversion of signals that is used for accepting becomes electric signal to export described signal processing module to; Described signal processing module judges whether to reach predefined alarm threshold value according to the space temperature that calculates.Described predefined alarm threshold value can be the temperature alarming threshold value, also can be that temperature rise rate is reported to the police, and perhaps two alarm threshold values all possess.
Further, described wavelength selectivity is unidirectional to be the unidirectional module of passing through of four-way wavelength selectivity that includes A, B, C, four ports of D by module, and described A port is accepted the input laser of described laser with fixed wavelength and should be imported the laser uniaxially and export from the B port; Back scattering light signal from the input of B port, unidirectional through this four-way wavelength selectivity by after the module separation, from C port and the output of D port, wherein the light signal of C port output is that the light signal that temperature variant light signal and D port are exported is not temperature variant reference optical signal, described photoelectric commutator comprises first photoelectric commutator and second photoelectric commutator, described first photoelectric commutator is connected with the unidirectional C port light by module of described four-way wavelength selectivity, described second photoelectric commutator is connected with the unidirectional D port light by module of described four-way wavelength selectivity, and described first photoelectric commutator and second photoelectric commutator electric signal after with opto-electronic conversion exports described signal processing module to.
Further, also comprise the alarm module that is connected with described signal processing module, described signal processing module judges whether to reach predefined temperature alarming threshold value and temperature rise rate alarm threshold value according to the space temperature that calculates, if reach temperature alarming threshold value or temperature rise rate alarm threshold value, then output signal to alarm module, report to the police by alarm module.
Further, described multichannel photoswitch is for being transferred to unidirectional road light signal by the module input of wavelength selectivity in turn the photoswitch of described many transmission temperature-sensitive optical cables.
Further, the wavelength of the laser pulse string of described laser with fixed wavelength output is identical.
Further, separate between the described many transmission temperature-sensitive optical cables.
The invention provides technical scheme, can measure large-depth space temperature field, it is simple to have a networking, only need lay corresponding temperature-sensitive optical cable as required and get final product, and it is low to have a cost, the advantage that reliability is high.
Description of drawings
Fig. 1 is large-depth space temperature field detecting of the present invention and fire disaster alarming device example structure synoptic diagram;
Fig. 2 is the unidirectional theory structure synoptic diagram by module of four-way wavelength selectivity in the embodiment of the invention.
Embodiment
As shown in Figure 1, a kind of large-depth space temperature field detecting and fire disaster alarming device, comprise that laser controller 1, laser with fixed wavelength 2, four-way wavelength selectivity are unidirectional by module 3, multichannel photoswitch 4, many transmission temperature-sensitive optical cable (not shown), first photoelectric commutator 61, second photoelectric commutator 62, signal processing module 7, alarm module 8.
Wherein, described laser controller 1 is connected with described laser with fixed wavelength 2, be used to produce control signal, make the laser pulse string of a series of preset widths of laser with fixed wavelength 2 outputs, frequency, the width of this laser pulse string and frequency adjustable, the wavelength of the laser pulse string of preferred output is identical in the present embodiment.
Wherein, described four-way wavelength selectivity is unidirectional by module 3 as shown in Figure 2, includes A, B, four ports of C, D.The A port is only accepted the input laser of laser with fixed wavelength 2, and can not obtain laser output from this port, and can only export from the B port by uniaxially from the laser of A port input; Laser from the input of B port, unidirectional through this four-way wavelength selectivity by after module 3 separation, can only be from C port and the output of D port, wherein the light signal of C port output is that the light signal that temperature variant light signal and D port are exported is not temperature variant reference optical signal.
Multichannel photoswitch 4, be used for to be transferred to many transmission temperature-sensitive optical cable (not shown) in turn from one road light signal of the unidirectional B port output by module 3 of four-way wavelength selectivity, and the rear orientation light that will carry temperature information is back to the unidirectional B port by module 3 of four-way wavelength selectivity along transmission temperature-sensitive optical cable.
Many transmission temperature-sensitive optical cables are used to form space temperature temperature-sensitive network, and are separate between the optical cable, uncorrelated mutually, as the transmission medium of laser, also are the temperature-sensitive unit that space temperature is surveyed, and are again the transmission mediums of temperature-sensitive signal simultaneously.
First photoelectric commutator 61 is connected with the unidirectional C port light by module 3 of described four-way wavelength selectivity, second photoelectric commutator 62 is connected with the unidirectional D port light by module 3 of described four-way wavelength selectivity, is used for changing pulsed optical signals into electric impulse signal.
Signal processing module 7 is used to gather next electric impulse signal to light first electric modular converter 61, the second electric modular converter 62, calculates space temperature according to this electric impulse signal.
Wherein, also comprise the alarm module 8 that is connected with signal processing module 7, described signal processing module 7 judges whether to reach predefined temperature alarming threshold value and temperature rise rate alarm threshold value according to the space temperature that calculates, if reach temperature alarming threshold value or temperature rise rate alarm threshold value, then output signal to alarm module 8, report to the police by alarm module 8.
The course of work of above-mentioned large-depth space temperature field detecting and fire disaster alarming device is as follows:
At first produce a series of electric pulse strings and drive laser with fixed wavelength 2 generation laser pulse strings by laser controller 1, it is unidirectional by the A port of module 3 and by the output of B port to be injected into the four-way wavelength selectivity, behind multichannel photoswitch 4, alternately be injected in multichannel (1 to n road) the transmission temperature-sensitive optical cable.The laser pulse string is propagated forward along transmission temperature-sensitive optical cable, bump with silicon dioxide in the transmission temperature-sensitive optical cable and produce scattering, the rear orientation light that wherein carries temperature information is back to the unidirectional B port by module 3 of four-way wavelength selectivity along the former road of transmission temperature-sensitive optical cable, after selecting by this module, by temperature variant light signal of C port output with by not temperature variant reference signal of D port output, convert light signal to electric signal through photoelectric commutator 6, calculate along the axial space temperature of temperature-sensitive optical cable by signal processing module 7, compare judgement according to predefined temperature alarming threshold value and temperature rise rate threshold value, when satisfying alert if, output alarm signal carries out fire alarm to alarm module 8 by alarm module 8.
Claims (8)
1, a kind of large-depth space temperature field detecting and fire disaster alarming device, it is characterized in that comprising: laser controller, laser with fixed wavelength, wavelength selectivity are unidirectional by module, multichannel photoswitch, many transmission temperature-sensitive optical cables, photoelectric commutator, signal processing module, wherein
Described laser controller is connected with described laser with fixed wavelength, and described laser controller produces control signal, makes laser with fixed wavelength output laser pulse string, the width of described laser pulse string and frequency adjustable;
Described wavelength selectivity is unidirectional to be connected with described laser with fixed wavelength, described photoelectric commutator and described multichannel photoswitch by module, accept the input laser of described laser with fixed wavelength and export described multichannel photoswitch to, and accept described multichannel photoswitch input the back scattering light signal and export this back scattering light signal to described photoelectric commutator;
Described multichannel photoswitch is connected with many transmission temperature-sensitive optical cables, be used for giving described many transmission temperature-sensitive optical cables, and the rear orientation light that will carry temperature information is back to the unidirectional module of passing through of wavelength selectivity along transmission temperature-sensitive optical cable with unidirectional road optical signal transmission of wavelength selectivity by module input;
Described many transmission temperature-sensitive optical cables are used to form space temperature temperature-sensitive network;
Described photoelectric commutator is connected with described signal processing module, and the rear orientation light conversion of signals that is used for accepting becomes electric signal to export described signal processing module to; Described signal processing module judges whether to reach predefined alarm threshold value according to the space temperature that calculates.
2, large-depth space temperature field detecting according to claim 1 and fire disaster alarming device, it is characterized in that: described wavelength selectivity is unidirectional to be the unidirectional module of passing through of four-way wavelength selectivity that includes A, B, C, four ports of D by module, and described A port is accepted the input laser of described laser with fixed wavelength and should be imported the laser uniaxially and export from the B port; Back scattering light signal from the input of B port, unidirectional through this four-way wavelength selectivity by after the module separation, from C port and the output of D port, wherein the light signal of C port output is that the light signal that temperature variant light signal and D port are exported is not temperature variant reference optical signal, described photoelectric commutator comprises first photoelectric commutator and second photoelectric commutator, described first photoelectric commutator is connected with the unidirectional C port light by module of described four-way wavelength selectivity, described second photoelectric commutator is connected with the unidirectional D port light by module of described four-way wavelength selectivity, and described first photoelectric commutator and second photoelectric commutator electric signal after with opto-electronic conversion exports described signal processing module to.
3, large-depth space temperature field detecting according to claim 1 and 2 and fire disaster alarming device, it is characterized in that: also comprise the alarm module that is connected with described signal processing module, described signal processing module judges whether to reach predefined alarm threshold value according to the space temperature that calculates, if reach temperature alarming threshold value or temperature rise rate alarm threshold value, then output signal to alarm module, report to the police by alarm module.
4, large-depth space temperature field detecting according to claim 3 and fire disaster alarming device is characterized in that: described multichannel photoswitch is for being transferred to unidirectional road light signal by the module input of wavelength selectivity in turn the photoswitch of described many transmission temperature-sensitive optical cables.
5, large-depth space temperature field detecting according to claim 3 and fire disaster alarming device is characterized in that: the wavelength of the laser pulse string of described laser with fixed wavelength output is identical.
6, large-depth space temperature field detecting according to claim 3 and fire disaster alarming device is characterized in that: separate between the described many transmission temperature-sensitive optical cables.
7, large-depth space temperature field detecting according to claim 3 and fire disaster alarming device is characterized in that: described predefined alarm threshold value is the temperature alarming threshold value.
8, large-depth space temperature field detecting according to claim 3 and fire disaster alarming device is characterized in that: described predefined alarm threshold value is the temperature rise rate alarm threshold value.
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| CNB2008100327910A CN100568307C (en) | 2008-01-17 | 2008-01-17 | Large-depth space temperature field detecting and fire disaster alarming device |
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| US20130322490A1 (en) * | 2012-05-31 | 2013-12-05 | Kidde Technologies, Inc. | Optical fiber sensing system |
| CN104952200A (en) * | 2015-06-20 | 2015-09-30 | 宁波南车时代传感技术有限公司 | DTS (Distributed Optical Fiber Temperature Sensor)-based distributed type train temperature monitoring device |
| CN108267229A (en) * | 2016-12-30 | 2018-07-10 | 中国移动通信集团上海有限公司 | A kind of method, apparatus for measuring air themperature field and preparation method thereof |
| CN112647927A (en) * | 2020-12-29 | 2021-04-13 | 天水电气传动研究所集团有限公司 | Automatic early warning method for power point temperature rise step type grading of drilling machine electric control system |
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