CN102779389A - Single ultraviolet phototube optical detector for fire detection at high temperature - Google Patents
Single ultraviolet phototube optical detector for fire detection at high temperature Download PDFInfo
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- CN102779389A CN102779389A CN2012102515643A CN201210251564A CN102779389A CN 102779389 A CN102779389 A CN 102779389A CN 2012102515643 A CN2012102515643 A CN 2012102515643A CN 201210251564 A CN201210251564 A CN 201210251564A CN 102779389 A CN102779389 A CN 102779389A
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Abstract
The invention discloses a single ultraviolet phototube optical detector for fire detection at high temperature. The single ultraviolet phototube optical detector comprises a power filtering conversion circuit, an ultraviolet sensing circuit, a temperature compensation circuit, a window contamination detection circuit, a CPU (central processing unit) interface circuit, a serial port communication circuit and an indicator light circuit. Information of operation state and the like can be transmitted to an upper computer timely by serial port communication. A single ultraviolet photounit adaptive to ultraviolet light of flame is used, so that infrared radiation interference of a power chamber at high temperature is avoided, fire detection is highly accurate, and anti-false-positive capacity is high. Temperature compensation is performed by CPU sampling and calculation, time detectivity is consistent at wide temperature, and intelligent degree is increased remarkably. The condition that window glass is contaminated by oil in the power chamber can be detected by the window contamination detection circuit and reported to the upper computer.
Description
Technical field
Patent of the present invention relates to a kind of optical detector, in particular, relates to a kind of at the alert single ultraviolet light photo lightpipe optics detector of hot environment test fire detecting.
Background technology
In the fire early-warning system that special vehicle is commonly used at present, piggyback pod mainly is to use heat-conduction principle to survey fire alarm, for example uses line formula flame sensor, and it is little that it feels fiery area, and sensitivity is not high yet.Along with progress of science and technology and development, the application of optics is broad day by day, learns that according to relevant digest existing optical detector mainly is divided into two types: one type is infrared detector, and one type is ultraviolet light detector.Yet because the complicacy of special vehicle piggyback pod environment, infrared photosensitive components and parts receive the heat radiation influence of generations such as engine easily and report by mistake.In addition, temperature has bigger influence for the sensitivity of photosensitive components and parts, and temperature is low more, and sensitivity is high more, and for the wide temperature occasion that is applied to-40 ℃～+ 105 ℃, existing optical detector can't be accomplished the consistance of detection sensitivity.
Summary of the invention
The present invention provides a kind of and can accurately survey fire alarm at the alert single ultraviolet light photo lightpipe optics detector of hot environment test fire detecting in order to overcome weak point of the prior art, is suitable for special vehicle and under rigorous environment, uses.
The technical scheme that the present invention adopted is following:
A kind of at the alert single ultraviolet light photo lightpipe optics detector of hot environment test fire detecting, comprising: power filter change-over circuit, ultraviolet light sensing circuit, temperature-compensation circuit, window pollution testing circuit, cpu interface circuit, serial communication circuit and indicator light circuit.
Described power filter change-over circuit is made up of power module, booster circuit and peripheral circuit thereof, realizes the power supply input.
Described pollution detection circuit connects the A/D conversion port of CPU, is made up of testing circuit and signal conditioning circuit.Wherein, testing circuit is a silicon PIN photoelectric diode, is used to judge that whether window glass is by oil pollution.Signal conditioning circuit is made up of divider resistance and current-limiting resistance, is used for input signal is carried out dividing potential drop and current limliting, makes it be adapted to the input of the A/D port of CPU.
Described ultraviolet light fulgurite circuit is connected with the step-by-step counting port of CPU, is made up of the booster circuit, ultraviolet light fulgurite and the signal conditioning circuit that connect successively, is used to judge whether to receive UV-irradiation.Signal conditioning circuit comprises comparer and peripheral circuit thereof, and the spike pulse signal that is used for that the ultraviolet light fulgurite is sent is made into the square-wave pulse signal of certain amplitude, makes it be adapted to the input of the counting port of CPU.Booster circuit comprises high speed operation amplifier, 1:20 transformer, rectifier bridge and voltage stabilizing, filter capacitor, and wherein the negative input end of high speed operation amplifier is drawn the booster circuit detection signal and is connected with the A/D conversion port of CPU.Ultraviolet light sensing tube is GGD103, spectral response range 160 ~ 260nm.
Described temperature-compensation circuit is connected with the A/D conversion port of CPU, is made up of thermistor and divider resistance, is used for measures ambient temperature, revises detection sensitivity.Wherein thermistor is a mounted on surface negative temperature coefficient sheet type 100K Ω thermistor.
Described cpu interface circuit comprises Freescale single-chip microcomputer MC9S12DP512MPVE, outer watchdog chip X5043S8I, 12MHz crystal oscillator, the download of BDM program, debugging interface and chip periphery resistance, electric capacity, is used for output and communication management are changed, calculate, controlled to analog quantity, the pulsed quantity of input.
Described serial communication circuit is made up of serial port communication chip MAX232EPE and peripheral circuit thereof, and serial port communication chip is connected with the serial data sending and receiving end of said CPU, has realized the transmitting-receiving of serial data.
Described indicator light circuit is connected with the I/O port of said CPU, is made up of φ 5 double color luminotron L-59EGW-CA10 and current-limiting resistance, is used for indicating operating status and fire alarm.
Serial communication of the present invention; Can give host computer with information transmission such as duties in time; Because the light activated element of having selected for use the ultraviolet spectral range with flame to adapt, it is high to survey the fire alarm accuracy rate, and false alarm prevention capability is strong; Carry out temperature compensation through CPU sampling, computing, detection sensitivity is consistent under wide temperature environment; Fully the calculation process ability of utilization CPU is carried out work such as fault self-checking, and intelligent degree significantly is improved.Owing to adopted the design of single ultraviolet, when the engine operation of vehicle power cabin, can not receive the heat radiation influence and report by mistake.
Description of drawings
Fig. 1 is a high-level schematic functional block diagram of the present invention;
Fig. 2 is power filter of the present invention, change-over circuit schematic diagram;
Fig. 3 is a window pollution testing circuit schematic diagram of the present invention;
Fig. 4 is the booster circuit schematic diagram in the ultraviolet light sensing circuit of the present invention;
Fig. 5 is the signal conditioning circuit schematic diagram in the ultraviolet light sensing circuit of the present invention;
Fig. 6 is a temperature-compensation circuit schematic diagram of the present invention;
Fig. 7 is a serial communication circuit schematic diagram of the present invention;
Fig. 8 is an indicator light circuit schematic diagram of the present invention;
Embodiment
Below through accompanying drawing and specific embodiment technical scheme of the present invention is done a detailed explanation:
The high-level schematic functional block diagram of the single ultraviolet light photo lightpipe optics of the present invention shown in Figure 1 detector is made up of power filter change-over circuit, window pollution testing circuit, ultraviolet light sensing circuit, temperature-compensation circuit, cpu interface circuit, serial communication circuit and indicator light circuit.
Shown in Figure 2 is power filter of the present invention, change-over circuit schematic diagram, and in order to adapt to the power environment that the special vehicle fluctuation is big, interference is many, the power filter change-over circuit is made up of power module 4NIC-DC5, booster circuit and peripheral circuit thereof.Transition peak voltage in the power filter filter out power, export 5V voltage stably, the one tunnel send antifouling testing circuit, and the ultraviolet light sensing circuit is sent on another road, and CPU and the required power supply of peripheral components work thereof are provided simultaneously.
Shown in Figure 3 is window pollution testing circuit schematic diagram of the present invention.Be made up of antifouling testing circuit and signal conditioning circuit, be connected with the A/D conversion port of CPU, wherein, antifouling testing circuit is silicon PIN photoelectric diode BPW24, is used to judge that whether window glass is by oil pollution.When silicon PIN photoelectric diode BPW24 receives the infrared light of specific wavelength, its resistance value will change, and on circuit, show as the fluctuation of voltage, and CPU can judge through the variation of this magnitude of voltage of A/D port detection whether the infrared light irradiation is arranged.Signal conditioning circuit is made up of divider resistance and current-limiting resistance, is used for input signal is carried out dividing potential drop and current limliting, makes it be adapted to the input of the A/D port of CPU.
Shown in Figure 4 is ultraviolet light sensing circuit schematic diagram of the present invention, is made up of booster circuit, ultraviolet light fulgurite, signal conditioning circuit, is connected with cpu burst counting port, and ultraviolet light sensing tube is GGD103, spectral response range 160 ~ 260nm.Signal conditioning circuit comprises comparer LM193 and peripheral circuit thereof; The spike pulse signal that is used for that the ultraviolet light fulgurite is sent is made into the square pulse signal of certain amplitude; Make its input that is adapted to the counting port of CPU, wherein, booster circuit comprises high speed operation amplifier LM101AJ, 1:20 transformer, rectifier bridge and voltage stabilizing, filter capacitor; Wherein the negative input end of high speed operation amplifier LM101AJ is drawn the booster circuit detection signal and is connected with the A/D conversion port of CPU; Because the ultraviolet light photo plumber makes voltage up to nearly 400VDC,, therefore need booster circuit to provide ultraviolet light fulgurite operate as normal required voltage far above the input voltage of 24VDC.High speed operation amplifier LM101AJ constitutes a comparer; Negative input end makes constantly upset of its output with respect to the pulsation of positive input terminal reference voltage; The break-make of control triode Q3 has produced the 24V alternating voltage in the center tap terminal of transformer T1, through transformer boost, rectifier bridge rectification, capacitance voltage stabilizing, filtering; Promptly produced the 380V high pressure, the WV of ultraviolet light fulgurite is provided.When the ultraviolet light fulgurite receives the ultraviolet light of specific wavelength, its negative terminal will produce spike pulse, and through stabilivolt D9 amplitude limit in the modulate circuit shown in Figure 5 and comparer LM193 conditioning, spike pulse becomes square pulse, is convenient to CPU and detects.CPU is for this step-by-step counting, can be judged as and receives UV-irradiation when counting a large amount of umber of pulses at short notice, if umber of pulse greater than this photoelectric tube physical characteristics, can be judged as fire alarm.
Fig. 6 is a temperature-compensation circuit schematic diagram of the present invention, is made up of thermistor and divider resistance, is connected with the A/D conversion port of CPU, and wherein thermistor is a mounted on surface negative temperature coefficient sheet type 100K Ω thermistor.The A/D conversion port of CPU detects the voltage of divider resistance end; In 40 ℃ ~+105 ℃ scopes, be similar to linear change; Can judge that the reference value that receives illumination revises to infrared and ultraviolet light sensing tube through detecting this magnitude of voltage, thereby guarantee the consistance of detection sensitivity under wide temperature condition.
Cpu interface circuit is made up of Freescale single-chip microcomputer MC9S12DP512, outer watchdog chip X5043S8I, 12MHz crystal oscillator, the download of BDM program, debugging interface and chip periphery resistance, electric capacity etc.; The A/D conversion port of CPU and step-by-step counting port receive from above-mentioned antifouling testing circuit; Voltage and pulse signal that the ultraviolet light sensing circuit produces, the line item of going forward side by side.Outer watchdog chip X5043S8I can be restarted at the situation of the program fleet cpu reset of ordering.MC9S12DP512 is 16 mixed signal CPU, has powerful signal Processing, calculation function and multiple, multiple bus interface.CPU detects through the A/D conversion port that antifouling detection magnitude of voltage PLT and high pressure test side magnitude of voltage UVCHK be whether too high or too low to judge whether it breaks down; Send to host computer to above-mentioned information through serial ports.
Fig. 7 is a serial communication circuit schematic diagram of the present invention; Serial communication circuit is made up of serial port communication chip MAX232EPE and peripheral circuit thereof; Wherein serial port communication chip MAX232EPE is connected with the two-way serial data sending and receiving end of said CPU; Convert the data transmit-receive signal of CPU end into rs 232 serial interface signal, the isolation of serial communication circuit power supply and data-signal is provided simultaneously, the protection internal circuit.
It is as shown in Figure 8 that the present invention is provided with the alarm lamp circuit; Form by φ 5 double color luminotron L-59EGW-CA and current-limiting resistance; Be connected with the I/O port of CPU, the every 5s flicker of the I/O mouth of CPU control green light is not once glimmered during the ultraviolet fault when optical detector is in proper working order; Then the I/O mouth of CPU control red light is bright to warn when detecting fire alarm.
More than describing not is to be limitation of the present invention, can not assert that practical implementation of the present invention can only be confined to above description content.For the those of ordinary skill of technical field under the present invention, under the prerequisite that does not break away from the present invention's design, the variation of proposition, remodeling, interpolation or replacement all belong to protection domain of the present invention.
Claims (10)
1. the single ultraviolet light photo lightpipe optics detector in the police of hot environment test fire detecting is characterized in that, comprises the power filter change-over circuit, is used to realize the power supply input; Cpu interface circuit is used for output and communication management are changed, calculate, controlled to analog quantity, the pulsed quantity of input; The window pollution testing circuit, the A/D conversion port of connection CPU is used to judge whether window glass receives oil pollution; The ultraviolet light sensing circuit, the step-by-step counting port of connection CPU is used to judge whether to receive UV-irradiation; Temperature-compensation circuit, the A/D conversion port of connection CPU is used for measures ambient temperature, revises detection sensitivity; Serial communication circuit connects the serial data sending and receiving end of said CPU, realizes the transmitting-receiving of serial data; Indicator light circuit connects the I/O port of said CPU, is used for indicating operating status and fire alarm.
2. according to claim 1 at the alert single ultraviolet light photo lightpipe optics detector of hot environment test fire detecting, its characteristic is that said power filter change-over circuit is made up of power module, booster circuit and peripheral circuit thereof.
3. according to claim 1 at the alert single ultraviolet light photo lightpipe optics detector of hot environment test fire detecting, its characteristic is that said window pollution testing circuit is made up of silicon PIN photoelectric diode and signal conditioning circuit.
4. according to claim 3 at the alert single ultraviolet light photo lightpipe optics detector of hot environment test fire detecting; Its characteristic is; Said signal conditioning circuit is made up of divider resistance and current-limiting resistance; Be used for the PIN photodiode signal is carried out dividing potential drop and current limliting, make it be adapted to the input of the AD port of CPU.
5. according to claim 1 at the alert single ultraviolet light photo lightpipe optics detector of hot environment test fire detecting; Its characteristic is that said ultraviolet light sensing circuit is made up of the booster circuit, the ultraviolet light fulgurite that connect successively and the signal conditioning circuit that makes UV signal be adapted to the step-by-step counting port of CPU.
6. according to claim 5 at the alert single ultraviolet light photo lightpipe optics detector of hot environment test fire detecting; Its characteristic is; Said booster circuit comprises that high speed operation amplifier, transformer, rectifier bridge and voltage stabilizing, filter capacitor form, and wherein the negative input end of high speed operation amplifier is drawn the booster circuit detection signal and is connected with the AD conversion port of CPU.
7. according to claim 5 its characteristic is that said ultraviolet light fulgurite is GGD103 at the alert single ultraviolet light photo lightpipe optics detector of hot environment test fire detecting, and spectral response range is 160 ~ 260nm.
8. according to claim 1 at the alert single ultraviolet light photo lightpipe optics detector of hot environment test fire detecting, its characteristic is that said temperature-compensation circuit is made up of thermistor and divider resistance.
9. according to claim 8 at the alert single ultraviolet light photo lightpipe optics detector of hot environment test fire detecting, its characteristic is that said thermistor is a mounted on surface negative temperature coefficient sheet type 100K Ω thermistor.
10. according to claim 1 at the alert single ultraviolet light photo lightpipe optics detector of hot environment test fire detecting, its characteristic is that said indicator light circuit is made up of double color luminotron and current-limiting resistance.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103076087A (en) * | 2012-12-28 | 2013-05-01 | 西北核技术研究所 | Mid-infrared photoelectric detector driving circuit, detector assembly and assembly array |
| CN103198604A (en) * | 2013-04-01 | 2013-07-10 | 西安北方光电科技防务有限公司 | Device and method capable of prompting reliability of mining gas pipeline fire detector |
| CN103593941A (en) * | 2013-09-22 | 2014-02-19 | 上海电控研究所 | Silicon carbide ultraviolet photoelectric tube based fire detector and fire detection method thereof |
| CN103680034A (en) * | 2013-11-28 | 2014-03-26 | 大连世安科技股份有限公司 | Multiband video detector |
| CN103761528A (en) * | 2013-12-20 | 2014-04-30 | 合肥科大立安安全技术股份有限公司 | Flame identification method based on ultraviolet photoelectric tube |
| CN104217526A (en) * | 2014-08-11 | 2014-12-17 | 江门市丰鸣达科技有限公司 | Fire early warning method and fire isolating method |
| CN109493560A (en) * | 2018-11-12 | 2019-03-19 | 中国兵器装备集团上海电控研究所 | Piggyback pod optical detector pollution detection optical path based on extreme ultraviolet light detector |
| CN112185056A (en) * | 2020-09-03 | 2021-01-05 | 西安北方光电科技防务有限公司 | High-precision flame detector and flame detection method |
| CN112904768A (en) * | 2021-01-19 | 2021-06-04 | 中国兵器装备集团上海电控研究所 | Communication method and system based on power cabin environment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103076087B (en) * | 2012-12-28 | 2015-05-27 | 西北核技术研究所 | Mid-infrared photoelectric detector driving circuit, detector assembly and assembly array |
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| CN103198604A (en) * | 2013-04-01 | 2013-07-10 | 西安北方光电科技防务有限公司 | Device and method capable of prompting reliability of mining gas pipeline fire detector |
| CN103593941A (en) * | 2013-09-22 | 2014-02-19 | 上海电控研究所 | Silicon carbide ultraviolet photoelectric tube based fire detector and fire detection method thereof |
| CN103680034A (en) * | 2013-11-28 | 2014-03-26 | 大连世安科技股份有限公司 | Multiband video detector |
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| CN104217526A (en) * | 2014-08-11 | 2014-12-17 | 江门市丰鸣达科技有限公司 | Fire early warning method and fire isolating method |
| CN104217526B (en) * | 2014-08-11 | 2017-01-25 | 江门市丰鸣达科技有限公司 | Fire early warning method and fire isolating method |
| CN109493560A (en) * | 2018-11-12 | 2019-03-19 | 中国兵器装备集团上海电控研究所 | Piggyback pod optical detector pollution detection optical path based on extreme ultraviolet light detector |
| CN109493560B (en) * | 2018-11-12 | 2020-10-16 | 中国兵器装备集团上海电控研究所 | Power cabin optical detector pollution detection light path based on far ultraviolet detector |
| CN112185056A (en) * | 2020-09-03 | 2021-01-05 | 西安北方光电科技防务有限公司 | High-precision flame detector and flame detection method |
| CN112904768A (en) * | 2021-01-19 | 2021-06-04 | 中国兵器装备集团上海电控研究所 | Communication method and system based on power cabin environment |
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Application publication date: 20121114 |