CN201937548U - Self-adapting distributive optical fiber temperature measuring laser detection amplifier - Google Patents
Self-adapting distributive optical fiber temperature measuring laser detection amplifier Download PDFInfo
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- CN201937548U CN201937548U CN2011200635410U CN201120063541U CN201937548U CN 201937548 U CN201937548 U CN 201937548U CN 2011200635410 U CN2011200635410 U CN 2011200635410U CN 201120063541 U CN201120063541 U CN 201120063541U CN 201937548 U CN201937548 U CN 201937548U
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Abstract
The utility model provides a self-adopting distributive optical fiber temperature measuring laser detection amplifier, which relates to a device used for self-adopting temperature change regulation of a laser detector, laser detection amplitude probability distribution (APD) high voltage output and temperature compensation and detector signal modulation in a distributive optical fiber temperature measuring system. The self-adopting distributive optical fiber temperature measuring laser detection amplifier overcomes the defects of insufficient band width, poor temperature adaptability of the laser detection per se, poor performance of the signal amplifier, low data accumulation speed and weak synchronization performance of the laser detector in the prior art. A compensation voltage signal output end of an environment temperature detection and temperature regulation compensation circuit is connected with a compensation voltage signal input end of a high-voltage gain regulation change circuit of the detector, an APD bias voltage output end of the high-voltage gain regulation change circuit of the detector is connected with APD bias voltage input ends of a laser detection APD and an auxiliary circuit, the alternating current voltage signal output ends of the laser detection APD and the auxiliary circuit are connected with the alternating current voltage signal input end of the detector APD amplification and signal regulation circuit, and the output end of the detector APD amplification and signal regulation circuit is the output end of the self-adopting distributive optical fiber temperature measuring laser detection amplifier. The self-adopting distributive optical fiber temperature measuring laser detection amplifier is used for the distributive optical fiber temperature measuring system.
Description
Technical field
The utility model relate to laser detector self-adaptive temperature in the temperature-measuring system of distributed fibers change adjust, laser acquisition APD high pressure output and temperature-compensating, detector signal are nursed one's health device.
Background technology
In the acquisition of signal of the temperature of temperature-measuring system of distributed fibers is analyzed, develop enough bandwidth laser detector, temperature adjustment and compensation, low noise, multiple is an important technical links greatly.Traditional Laser Detecting Set has weakness such as the thermal adaptability extreme difference, signal amplifier poor performance of bandwidth deficiency, laser acquisition itself.Develop the adapter distribution optical fiber temperature-measurement laser acquisition amplifier that meets the demands according to signal characteristic in the temperature-measuring system of distributed fibers and in conjunction with the specification requirement and the modem electronic circuitry technical development of temp measuring system.
Summary of the invention
The utility model is low for thermal adaptability extreme difference, the signal amplifier poor performance data accumulation speed that overcomes prior art laser detector bandwidth deficiency, laser acquisition itself, the defective that net synchronization capability is weak, and a kind of adapter distribution optical fiber temperature-measurement laser acquisition amplifier is provided.
The utility model realizes that the technical scheme that goal of the invention adopts is, adapter distribution optical fiber temperature-measurement laser acquisition amplifier comprises laser acquisition APD and auxiliary circuit, detector APD amplification and signal adjustment circuit, ambient temperature detects and temperature is adjusted compensating circuit and varying circuit is adjusted in the gain of detector high pressure; Ambient temperature detects and the compensation voltage signal output of temperature adjustment compensating circuit connects the compensation voltage signal input that varying circuit is adjusted in the gain of detector high pressure, the APD bias voltage output connection laser acquisition APD of varying circuit and the APD bias voltage input of auxiliary circuit are adjusted in the gain of detector high pressure, the ac voltage signal output of laser acquisition APD and auxiliary circuit connects the ac voltage signal input of detector APD amplification and signal adjustment circuit, and detector APD amplifies and the output of signal adjustment circuit is the output of adapter distribution optical fiber temperature-measurement laser acquisition amplifier.
The beneficial effects of the utility model are, in the temperature-measuring system of distributed fibers in the detection optical fiber information of backscattering light signal abundant more, the reflection temperature measurement accuracy is high more, makes the system linear degree high more; The rational compensation of the self-temperature of laser acquisition APD can improve the temperature measurement accuracy of system, simultaneously also than traditional thermostatic mode energy savings; The signal condition of laser acquisition APD signal high precision can reduce the temp measuring system noise, and the actual signal that collects is true more, and accuracy is high more, and the precision of thermometric is provided.
Below in conjunction with accompanying drawing the utility model is elaborated.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the structural representation that ambient temperature detection and temperature are adjusted compensating circuit 1-4.
Fig. 3 is the structural representation that varying circuit 1-3 is adjusted in the gain of detector high pressure.
Fig. 4 is the structural representation of laser acquisition APD and auxiliary circuit 1-1.
Fig. 5 is the structural representation of detector APD amplification and signal adjustment circuit 1-2.
Embodiment
Embodiment one: in conjunction with Fig. 1 present embodiment is described, an adapter distribution optical fiber temperature-measurement laser acquisition amplifier in the present embodiment comprises laser acquisition APD and auxiliary circuit 1-1, detector APD amplify and signal adjustment circuit 1-2, ambient temperature detect and temperature is adjusted compensating circuit 1-4 and varying circuit 1-3 is adjusted in the gain of detector high pressure; Ambient temperature detects and the compensation voltage signal output of temperature adjustment compensating circuit 1-4 connects the compensation voltage signal input that varying circuit 1-3 is adjusted in the gain of detector high pressure, the APD bias voltage output connection laser acquisition APD of varying circuit 1-3 and the APD bias voltage input of auxiliary circuit 1-1 are adjusted in the gain of detector high pressure, the ac voltage signal output of laser acquisition APD and auxiliary circuit 1-1 connects the ac voltage signal input of detector APD amplification and signal adjustment circuit 1-2, and detector APD amplifies and the output of signal adjustment circuit 1-2 is the output of adapter distribution optical fiber temperature-measurement laser acquisition amplifier.
Embodiment two: in conjunction with Fig. 2 present embodiment is described, present embodiment and embodiment one difference are that ambient temperature detects and temperature adjustment compensating circuit 1-4 comprises ambient temperature detection circuit 1-4-1 and laser acquisition APD variation of ambient temperature compensation adjustment circuit 1-4-2 two parts;
Ambient temperature detection circuit 1-4-1 comprises temperature sensors of high precision U1, the first high precision operating amplifier U3 and first resistance R 1;
The temperature current signal output part of temperature sensors of high precision U1 is connected with the inverting input of the first high precision operating amplifier U3 and an end of first resistance R 1 simultaneously, the in-phase input end ground connection of the first high precision operating amplifier U3, the other end of the output of the first high precision operating amplifier U3 and first resistance R 1 is connected to the temperature voltage signal output of ambient temperature detection circuit 1-4-1;
Ambient temperature detection circuit 1-4-1 finishes ambient temperature by temperature sensors of high precision U1, high precision operating amplifier U3, resistance R 1 and detects and export corresponding temperature voltage signal;
Laser acquisition APD variation of ambient temperature compensation adjustment circuit 1-4-2 comprises that high-accuracy voltage is with reference to device U2, the second high precision operating amplifier U4, second resistance R, 2 to the 5th resistance R 5 and slide rheostat T1;
The temperature voltage signal output of ambient temperature detection circuit 1-4-1 connects the voltage signal input that varying circuit 1-3 is adjusted in the gain of detector high pressure, the voltage signal input that varying circuit 1-3 is adjusted in the gain of detector high pressure is an end of the 3rd resistance R 3, the other end of the 3rd resistance R 3 is connected with an end of second resistance R 2 and the in-phase input end of the second high precision operating amplifier U4 simultaneously, the other end of second resistance R 2 connects the voltage signal output end of high-accuracy voltage with reference to device U2, the inverting input of the second high precision operating amplifier U4 is connected with an end of the 4th resistance R 4 and an end of the 5th resistance R 5 simultaneously, the other end ground connection of the 4th resistance R 4, the other end of the 5th resistance R 5 is connected with the fixed end of slide rheostat T1, the output of another fixed end of slide rheostat T1 and sliding end and the second high precision operating amplifier U4 is connected to the voltage signal output end of laser acquisition APD variation of ambient temperature compensation adjustment circuit 1-4-2, and the voltage signal output end of laser acquisition APD variation of ambient temperature compensation adjustment circuit 1-4-2 is the voltage signal output end that ambient temperature detection and temperature are adjusted compensating circuit 1-4.
With reference to device U2, the second high precision operating amplifier U4, second resistance R, 2 to the 5th resistance R 5 be connected the multiplication factor of slide rheostat T1 according to the environmental change parameter adjustment second high precision operating amplifier U4 of laser acquisition APD, the adjusted voltage signal that meets the demands send the gain of detector high pressure to adjust varying circuit 1-3 to laser acquisition APD variation of ambient temperature compensation adjustment circuit 1-4-2 by high-accuracy voltage; For example: the environmental change parameter of laser acquisition APD is 0.1V/ ℃, and the multiplication factor that at this moment needs to regulate U4 satisfies the ambient temperature voltage of giving laser acquisition APD 1 ℃ time 0.1V that will raise that raises.Ambient temperature detects and temperature adjustment compensating circuit 1-4 is used to realize that ambient temperature detects and the ambient temperature compensation conversion, and output signal gains as the detector high pressure and adjusts the input signal that varying circuit 1-3 mates.Current signal by temperature sensors of high precision U1 acquisition environment temperature among ambient temperature detection and the temperature adjustment compensating circuit 1-4 is converted to anti-phase temperature voltage signal V1 through the first high precision operating amplifier U3, high-accuracy voltage is with reference to the voltage V2 of device U2, when 25 ℃ of default ambient temperatures, ambient temperature detects and temperature is adjusted compensating circuit 1-4 output voltage 0V.Whenever 1 ℃ of the every rising of ambient temperature, the voltage that temperature voltage signal V1 changes is Δ v=1 μ A * R1, the input signal of the second high precision operating amplifier U4 is VV=V1-V2, output to the gain of detector high pressure after the amplification of voltage signal VV through the second high precision operating amplifier U4 and adjust varying circuit 1-3, the second high precision operating amplifier U4 multiplication factor is by the variation of ambient temperature parameter decision of laser acquisition APD.Other composition is identical with embodiment one with connected mode.
Embodiment three: in conjunction with Fig. 3 present embodiment is described, present embodiment and embodiment one difference are that detector high pressure gain adjustment varying circuit 1-3 comprises high pressure APD bias detector U5, the 9th electric capacity R9 to the 12 electric capacity R12, the 23 resistance R the 23 to the 27 resistance R 27, diode D1, triode G1 and energy storage device power inductance L; The COMP end of high pressure APD bias detector U5 connects an end of the 26 resistance R 26, and the other end of the 26 resistance R 26 connects an end of the 12 capacitor C 12, the other end ground connection of the 12 capacitor C 12; The 9th capacitor C 9 is filter capacitors that the power supply input connects, and power supply is connected the other end ground connection of the 9th capacitor C 9 with an end of the 9th capacitor C 9, the VIN end of high pressure APD bias detector U5 with the end of energy storage device power inductance L simultaneously; The GATE end of high pressure APD bias detector U5 connects the base stage of triode G1, the grounded collector of triode G1, the transmitter of triode G1 is connected with the other end of energy storage device power inductance L and the anode of diode D1 simultaneously, the negative electrode while of diode D1 and an end of the 11 capacitor C 11, the CS+ end of high pressure APD bias detector U5 and an end of the 27 resistance R 27, the 11 capacitor C 11 is a filter capacitor, the other end ground connection of the 11 capacitor C 11, the other end while of the 27 resistance R 27 and the CS-end of high pressure APD bias detector U5, one end of one end of the 23 resistance R 23 and the tenth capacitor C 10 is connected to the APD bias voltage output that varying circuit 1-3 is adjusted in the gain of detector high pressure, and the CS+ of the two ends of the 27 resistance R 27 and high pressure APD bias detector U5 and CS-join and realize that close-loop feedback control improves the precision of the bias voltage of exporting and the stability of system; The tenth capacitor C 10 is a filter capacitor, the other end ground connection of the tenth capacitor C 10, the other end of the 23 resistance R 23 is connected with an end of the 25 resistance R 25 with an end of the 24 resistance R 24, the FB end of high pressure APD bias detector U5 simultaneously, the other end ground connection of the 24 resistance R 24, the other end of the 25 resistance R 25 are adjusted the compensation voltage signal input of varying circuit 1-3 for the gain of detector high pressure; The gain of detector high pressure is adjusted varying circuit 1-3 and is finished the process that low pressure uprises pressure by the function of high pressure APD bias detector U5 own.The gain of detector high pressure is adjusted varying circuit 1-3 and is adjusted into high force feed laser acquisition APD and the auxiliary circuit 1-1 that meets the demands, and guarantees laser acquisition APD operate as normal.Temperature-compensating is to be changed by the bias voltage that the variation that ambient temperature detects and temperature adjustment compensating circuit 1-4 exports causes the output of high pressure APD bias detector U5 to be complementary to produce.High pressure APD bias detector U5 is that the avalanche photo diode (APD) among the laser acquisition APD of laser acquisition APD and auxiliary circuit 1-1 produces a low noise, high-tension bias voltage.By a constant frequency, pulse-width modulation (PWM) boost topology and particular structure--this structure adds selectable RC in feedback loop or the LC postfilter still can keep stablizing pressure regulation, is reached low-down output ripple and noise.Accurate reference and error amplifier can keep 0.5% output voltage accuracy.High pressure APD bias detector U5 can protect valuable laser acquisition APD, resists disadvantageous condition of work, and optimum bias voltage is provided simultaneously.Accurate high-end current limiting characteristic that high pressure APD bias detector U5 is integrated are protected the laser acquisition APD under the avalanche condition.A current limliting flag bit indicates accurate avalanche breakdown point to make things convenient for the calibration of laser acquisition APD working point.Other composition is identical with embodiment one with connected mode.
Embodiment four: in conjunction with Fig. 4 present embodiment is described, present embodiment and embodiment one difference are that laser acquisition APD and auxiliary circuit 1-1 comprise laser acquisition APD U6, the first high-voltage filtering capacitor C1 to the, three high-voltage filtering capacitor C3 and power conversion chip U7;
The end of the input of laser acquisition APD U6 and the 3rd high-voltage filtering capacitor C3 is connected to the APD bias voltage input of laser acquisition APD and auxiliary circuit 1-1, the other end ground connection of the 3rd high-voltage filtering capacitor C3, the power input of laser acquisition APD U6 is connected with the end of the first high-voltage filtering capacitor C1 and the power output end of power conversion chip U7 simultaneously, the other end ground connection of the first high-voltage filtering capacitor C1, the end of the power input of power conversion chip U7 and the second high-voltage filtering capacitor C2 is connected to the power input of laser acquisition APD and auxiliary circuit 1-1, the other end ground connection of the second high-voltage filtering capacitor C2, the signal output part of laser acquisition APD U6 is the output of laser acquisition APD and auxiliary circuit 1-1.
Laser acquisition APD U6 is the optical-electrical converter of wide bandwidth, the high-responsivity linearity, the avalanche photodide that adopts in the present embodiment; The light input signal of optical fiber is through laser detector APD U6, and power conversion chip U7 is the needed supply voltage of laser acquisition APD U6 with power conversion.
Other composition is identical with embodiment one with connected mode.
Embodiment five: in conjunction with Fig. 5 present embodiment is described, present embodiment and embodiment one difference are that detector APD amplifies and signal adjustment circuit 1-2 comprises first operation amplifier circuit 1-2-1 to the four-operational amplifier circuit 1-2-4 and the capacitance C4;
Detector APD amplifies and the input of signal adjustment circuit 1-2 is the input of capacitance C4, another input of capacitance C4 is connected with the input of the first operation amplifier circuit 1-2-1, the output of the first operation amplifier circuit 1-2-1 is connected with the input of the second operation amplifier circuit 1-2-2, the output of the second operation amplifier circuit 1-2-2 is connected with the input of the 3rd operation amplifier circuit 1-2-3, the output of the 3rd operation amplifier circuit 1-2-3 is connected with the input of four-operational amplifier circuit 1-2-4, and the output of four-operational amplifier circuit 1-2-4 is the output of detector APD amplification with signal adjustment circuit 1-2;
Wherein,
The first operation amplifier circuit 1-2-1 is made up of the 6th resistance R 6 to the 9th resistance R 9, the 5th capacitor C 5 and the 8th operational amplifier U8;
One end of the 6th resistance R 6 of the first operation amplifier circuit 1-2-1 and the in-phase input end of the 8th operational amplifier U8 are connected to the input of the first operation amplifier circuit 1-2-1, the other end ground connection of the 6th resistance R 6, the inverting input of the 8th operational amplifier U8 is connected with an end of the 7th resistance R 7 and an end of the 8th resistance R 8 simultaneously, the other end ground connection of the 7th resistance R 7, the other end of the 8th resistance R 8 is connected with the output of the 8th operational amplifier U8 and an end of the 5th capacitor C 5 simultaneously, the other end of the 5th capacitor C 5 is connected with an end of the 9th resistance R 9, and the other end of the 9th resistance R 9 is the output of the first operation amplifier circuit 1-2-1;
The second operation amplifier circuit 1-2-2 is made up of the tenth resistance R the 10 to the 13 resistance R 13, the 6th capacitor C 6 and the 9th operational amplifier U9;
One end of the tenth resistance R 10 of the second operation amplifier circuit 1-2-2 and the in-phase input end of the 9th operational amplifier U9 are connected to the input of the second operation amplifier circuit 1-2-2, the other end ground connection of the tenth resistance R 10, the inverting input of the 9th operational amplifier U9 is connected with an end of the 11 resistance R 11 and an end of the 12 resistance R 12 simultaneously, the other end ground connection of the 11 resistance R 11, the other end of the 12 resistance R 12 is connected with the output of the 9th operational amplifier U9 and an end of the 6th capacitor C 6 simultaneously, the other end of the 6th capacitor C 6 is connected with an end of the 13 resistance R 13, and the other end of the 13 resistance R 13 is the output of the second operation amplifier circuit 1-2-2;
The 3rd operation amplifier circuit 1-2-3 is made up of the 14 resistance R the 14 to the 17 resistance R 17, the 7th capacitor C 7 and the tenth operational amplifier U10,
One end of the 14 resistance R 14 of the 3rd operation amplifier circuit 1-2-3 and the in-phase input end of the tenth operational amplifier U10 are connected to the input of the 3rd operation amplifier circuit 1-2-3, the other end ground connection of the 14 resistance R 14, the inverting input of the tenth operational amplifier U10 is connected with an end of the 15 resistance R 15 and an end of the 16 resistance R 16 simultaneously, the other end ground connection of the 15 resistance R 15, the other end of the 16 resistance R 16 is connected with the output of the tenth operational amplifier U10 and an end of the 7th capacitor C 7 simultaneously, the other end of the 7th capacitor C 7 is connected with an end of the 17 resistance R 17, and the other end of the 17 resistance R 17 is the output of the 3rd operation amplifier circuit 1-2-3;
Four-operational amplifier circuit 1-2-4 is made up of the 18 resistance R the 18 to the 20 resistance R 21, the 8th capacitor C 8 and the 11 operational amplifier U11,
One end of the 18 resistance R 18 of four-operational amplifier circuit 1-2-4 and the in-phase input end of the 11 operational amplifier U11 are connected to the input of four-operational amplifier circuit 1-2-4, the other end ground connection of the 18 resistance R 18, the inverting input of the 11 operational amplifier U11 is connected with an end of the 19 resistance R 19 and an end of the 20 resistance R 20 simultaneously, the other end ground connection of the 19 resistance R 19, the other end of the 20 resistance R 20 is connected with the output of the 11 operational amplifier U11 and an end of the 8th capacitor C 8 simultaneously, the other end of the 8th capacitor C 8 is connected with an end of the 21 resistance R 21, and the other end of the 21 resistance R 21 is the output of four-operational amplifier circuit 1-2-4;
The circuit of first operation amplifier circuit 1-2-1 to the four-operational amplifier circuit 1-2-4 is formed identical with syndeton.
Detector APD amplifies amplification, the attenuation function that is used for analog voltage signal with signal adjustment circuit 1-2, the ac voltage signal that it obtains laser acquisition APD amplifies by the decay that level Four operational amplifier the 8th operational amplifier U8 to the 11 operational amplifier U11 carry out signal, adjusts the signal feed signals collector that meets the demands.
It is that the 8th operational amplifier U8 amplifies that the output signal of laser acquisition APD and auxiliary circuit 1-1 is given high-frequency operational amplifier through capacitance C4, the in-phase input end of the 8th operational amplifier U8 connects the 6th resistance R 6 over the ground to carry out taking a sample from laser acquisition APD, the inverting input of the 8th operational amplifier U8 connects the 7th resistance R 7 over the ground, the ratio that inverting input and output connect feedback resistance the 8th resistance R 8, the seven resistance R 7 and the 8th resistance R 8 determines the multiplication factor size of the 8th operational amplifier U8; The output of the 8th operational amplifier U8 connects every value electric capacity the 5th capacitor C 5, the output of the 5th capacitor C 5 is carried out the decay of signal by the 9th resistance R 9 and the tenth resistance R 10, signal after the decay send the in-phase input end of the 9th operational amplifier U9, the inverting input of the 9th operational amplifier U9 connects the 11 resistance R 11 over the ground, the ratio that inverting input and output connect feedback resistance the 12 resistance R 12, the 11 resistance R 11 and the 12 resistance R 12 determines the multiplication factor size of the 9th operational amplifier U9; The output of the 9th operational amplifier U9 connects every value electric capacity the 6th capacitor C 6, the output of the 6th capacitor C 6 is carried out the decay of signal by the 13 resistance R 13 and the 14 resistance R 14, signal after the decay send the in-phase input end of the tenth operational amplifier U10, the inverting input of the tenth operational amplifier U10 connects the 15 resistance R 15 over the ground, the ratio that inverting input and output connect feedback resistance the 16 resistance R 16, the 15 resistance R 15 and the 16 resistance R 16 determines the multiplication factor size of the tenth operational amplifier U10; The output of the tenth operational amplifier U10 connects every value electric capacity the 7th capacitor C 7, the output of the 7th capacitor C 7 is carried out the decay of signal by the 17 resistance R 17 and the 18 resistance R 18, signal after the decay send the in-phase input end of the 11 operational amplifier U11, the inverting input of the 11 operational amplifier U11 connects the 19 resistance R 19 over the ground, the ratio that inverting input and output connect feedback resistance the 20 resistance R 20, the 19 resistance R 19 and the 20 resistance R 20 determines the multiplication factor size of the 11 operational amplifier U11; The output that the signal output part of the 11 operational amplifier U11 connects every value electric capacity the 8th capacitor C 8, the eight capacitor C 8 connects the 20 resistance R 20.The 8th operational amplifier U8 to the 11 operational amplifier U11 are that the positive-negative power of high-frequency high-precision operational amplifier is to send into by connecting resistance, connect power filtering capacitor when sending into simultaneously.Other composition is identical with embodiment one with connected mode.
The AD590 chip of the U.S. ANALO G DEV ICES company that temperature sensors of high precision U1 adopts, high-accuracy voltage adopts the REF3125 chip of American TI Company (instrument company of Texas Instruments) with reference to device U2, the first high precision operating amplifier U3 and the second high precision operating amplifier U4 adopt the LM2904 chip of National Semiconductor (National Semiconductor), high pressure APD bias detector U5 adopts the MAX1902 chip of U.S. letter company (Maxim Integrated Products), laser acquisition APD U6 adopts Wuhan telecommunications PACS961-410-C40 detector, power conversion chip U7 adopts the LM1086 chip of National Semiconductor (National Semiconductor), and the 8th operational amplifier U8 to the 11 operational amplifier U11 adopt the OPA656 chip of American TI Company (instrument company of Texas Instruments).
The utility model content is not limited only to the content of the respective embodiments described above, and the combination of one of them or several embodiments equally also can realize the purpose of utility model.
Claims (5)
1. adapter distribution optical fiber temperature-measurement laser acquisition amplifier is characterized in that: it comprises laser acquisition APD and auxiliary circuit (1-1), detector APD amplifies detects with signal adjustment circuit (1-2), ambient temperature and temperature is adjusted compensating circuit (1-4) and detector high pressure gain adjustment varying circuit (1-3); Ambient temperature detects and the compensation voltage signal output of temperature adjustment compensating circuit (1-4) connects the compensation voltage signal input that varying circuit (1-3) is adjusted in the gain of detector high pressure, the APD bias voltage output connection laser acquisition APD of varying circuit (1-3) and the APD bias voltage input of auxiliary circuit (1-1) are adjusted in the gain of detector high pressure, the ac voltage signal output of laser acquisition APD and auxiliary circuit (1-1) connects the ac voltage signal input of detector APD amplification and signal adjustment circuit (1-2), and detector APD amplifies and the output of signal adjustment circuit (1-2) is the output of adapter distribution optical fiber temperature-measurement laser acquisition amplifier.
2. adapter distribution optical fiber temperature-measurement laser acquisition amplifier according to claim 1 is characterized in that ambient temperature detects and temperature adjustment compensating circuit (1-4) comprises ambient temperature detection circuit (1-4-1) and laser acquisition APD variation of ambient temperature compensation adjustment circuit (1-4-2) two parts; Ambient temperature detection circuit (1-4-1) comprises temperature sensors of high precision U1, the first high precision operating amplifier U3 and first resistance R 1; The temperature current signal output part of temperature sensors of high precision U1 is connected with the inverting input of the first high precision operating amplifier U3 and an end of first resistance R 1 simultaneously, the in-phase input end ground connection of the first high precision operating amplifier U3, the other end of the output of the first high precision operating amplifier U3 and first resistance R 1 is connected to the temperature voltage signal output of ambient temperature detection circuit (1-4-1); Ambient temperature detection circuit (1-4-1) is finished ambient temperature by temperature sensors of high precision U1, high precision operating amplifier U3, resistance R 1 and is detected and export corresponding temperature voltage signal; Laser acquisition APD variation of ambient temperature compensation adjustment circuit (1-4-2) comprises that high-accuracy voltage is with reference to device U2, the second high precision operating amplifier U4, second resistance R, 2 to the 5th resistance R 5 and slide rheostat T1; The temperature voltage signal output of ambient temperature detection circuit (1-4-1) connects the voltage signal input that varying circuit (1-3) is adjusted in the gain of detector high pressure, the voltage signal input that varying circuit (1-3) is adjusted in the gain of detector high pressure is an end of the 3rd resistance R 3, the other end of the 3rd resistance R 3 is connected with an end of second resistance R 2 and the in-phase input end of the second high precision operating amplifier U4 simultaneously, the other end of second resistance R 2 connects the voltage signal output end of high-accuracy voltage with reference to device U2, the inverting input of the second high precision operating amplifier U4 is connected with an end of the 4th resistance R 4 and an end of the 5th resistance R 5 simultaneously, the other end ground connection of the 4th resistance R 4, the other end of the 5th resistance R 5 is connected with the fixed end of slide rheostat T1, the output of another fixed end of slide rheostat T1 and sliding end and the second high precision operating amplifier U4 is connected to the voltage signal output end of laser acquisition APD variation of ambient temperature compensation adjustment circuit (1-4-2), and the voltage signal output end of laser acquisition APD variation of ambient temperature compensation adjustment circuit (1-4-2) is the voltage signal output end that ambient temperature detection and temperature are adjusted compensating circuit (1-4).
3. adapter distribution optical fiber temperature-measurement laser acquisition amplifier according to claim 1 and 2 is characterized in that detector high pressure gain adjustment varying circuit (1-3) comprises high pressure APD bias detector U5, the 9th capacitor C the 9 to the 12 capacitor C the 12, the 23 resistance R the 23 to the 27 resistance R 27, diode D1, field effect transistor G1 and energy storage device power inductance L; The COMP end of high pressure APD bias detector U5 connects an end of the 26 resistance R 26, and the other end of the 26 resistance R 26 connects an end of the 12 capacitor C 12, the other end ground connection of the 12 capacitor C 12; The 9th capacitor C 9 is filter capacitors that the power supply input connects, and power supply is connected the other end ground connection of the 9th capacitor C 9 with an end of the 9th capacitor C 9, the VIN end of high pressure APD bias detector U5 with the end of energy storage device power inductance L simultaneously; The GATE end of high pressure APD bias detector U5 connects the base stage of triode G1, the grounded collector of field effect transistor G1, the transmitter of triode G1 is connected with the other end of energy storage device power inductance L and the anode of diode D1 simultaneously, the negative electrode while of diode D1 and an end of the 11 capacitor C 11, the CS+ end of high pressure APD bias detector U5 and an end of the 27 resistance R 27, the 11 capacitor C 11 is a filter capacitor, the other end ground connection of the 11 capacitor C 11, the other end while of the 27 resistance R 27 and the CS-end of high pressure APD bias detector U5, one end of one end of the 23 resistance R 23 and the tenth capacitor C 10 is connected to the APD bias voltage output that varying circuit (1-3) is adjusted in the gain of detector high pressure, the tenth capacitor C 10 is a filter capacitor, the other end ground connection of the tenth capacitor C 10, the other end while of the 23 resistance R 23 and an end of the 24 resistance R 24, the FB end of high pressure APD bias detector U5 is connected with an end of the 25 resistance R 25, the other end ground connection of the 24 resistance R 24, the other end of the 25 resistance R 25 are adjusted the compensation voltage signal input of varying circuit (1-3) for the gain of detector high pressure.
4. adapter distribution optical fiber temperature-measurement laser acquisition amplifier according to claim 3 is characterized in that laser acquisition APD and auxiliary circuit (1-1) comprise laser acquisition APD U6, the first high-voltage filtering capacitor C1 to the, three high-voltage filtering capacitor C3 and power conversion chip U7; The end of the input of laser acquisition APD U6 and the 3rd high-voltage filtering capacitor C3 is connected to the APD bias voltage input of laser acquisition APD and auxiliary circuit (1-1), the other end ground connection of the 3rd high-voltage filtering capacitor C3, the power input of laser acquisition APD U6 is connected with the end of the first high-voltage filtering capacitor C1 and the power output end of power conversion chip U7 simultaneously, the other end ground connection of the first high-voltage filtering capacitor C1, the end of the power input of power conversion chip U7 and the second high-voltage filtering capacitor C2 is connected to the power input of laser acquisition APD and auxiliary circuit (1-1), the other end ground connection of the second high-voltage filtering capacitor C2, the signal output part of laser acquisition APD U6 are the output of laser acquisition APD and auxiliary circuit (1-1).
5. according to claim 1 or 4 described adapter distribution optical fiber temperature-measurement laser acquisition amplifiers, it is characterized in that detector APD amplifies and signal adjustment circuit (1-2) comprises that first operation amplifier circuit (1-2-1) is to four-operational amplifier circuit (1-2-4) and capacitance C4; Detector APD amplifies and the input of signal adjustment circuit (1-2) is the input of capacitance C4, another input of capacitance C4 is connected with the input of first operation amplifier circuit (1-2-1), the output of first operation amplifier circuit (1-2-1) is connected with the input of second operation amplifier circuit (1-2-2), the output of second operation amplifier circuit (1-2-2) is connected with the input of the 3rd operation amplifier circuit (1-2-3), the output of the 3rd operation amplifier circuit (1-2-3) is connected with the input of four-operational amplifier circuit (1-2-4), and the output of four-operational amplifier circuit (1-2-4) is the output of detector APD amplification with signal adjustment circuit (1-2); Wherein, first operation amplifier circuit (1-2-1) is made up of the 6th resistance R 6 to the 9th resistance R 9, the 5th capacitor C 5 and the 8th operational amplifier U8; One end of the 6th resistance R 6 of first operation amplifier circuit (1-2-1) and the in-phase input end of the 8th operational amplifier U8 are connected to the input of first operation amplifier circuit (1-2-1), the other end ground connection of the 6th resistance R 6, the inverting input of the 8th operational amplifier U8 is connected with an end of the 7th resistance R 7 and an end of the 8th resistance R 8 simultaneously, the other end ground connection of the 7th resistance R 7, the other end of the 8th resistance R 8 is connected with the output of the 8th operational amplifier U8 and an end of the 5th capacitor C 5 simultaneously, the other end of the 5th capacitor C 5 is connected with an end of the 9th resistance R 9, and the other end of the 9th resistance R 9 is the output of first operation amplifier circuit (1-2-1); Second operation amplifier circuit (1-2-2) is made up of the tenth resistance R the 10 to the 13 resistance R 13, the 6th capacitor C 6 and the 9th operational amplifier U9; One end of the tenth resistance R 10 of second operation amplifier circuit (1-2-2) and the in-phase input end of the 9th operational amplifier U9 are connected to the input of second operation amplifier circuit (1-2-2), the other end ground connection of the tenth resistance R 10, the inverting input of the 9th operational amplifier U9 is connected with an end of the 11 resistance R 11 and an end of the 12 resistance R 12 simultaneously, the other end ground connection of the 11 resistance R 11, the other end of the 12 resistance R 12 is connected with the output of the 9th operational amplifier U9 and an end of the 6th capacitor C 6 simultaneously, the other end of the 6th capacitor C 6 is connected with an end of the 13 resistance R 13, and the other end of the 13 resistance R 13 is the output of second operation amplifier circuit (1-2-2); The 3rd operation amplifier circuit (1-2-3) is by the 14 resistance R the 14 to the 17 resistance R 17, the 7th capacitor C 7 and the tenth operational amplifier U10 form, one end of the 14 resistance R 14 of the 3rd operation amplifier circuit (1-2-3) and the in-phase input end of the tenth operational amplifier U10 are connected to the input of the 3rd operation amplifier circuit (1-2-3), the other end ground connection of the 14 resistance R 14, the inverting input of the tenth operational amplifier U10 is connected with an end of the 15 resistance R 15 and an end of the 16 resistance R 16 simultaneously, the other end ground connection of the 15 resistance R 15, the other end of the 16 resistance R 16 is connected with the output of the tenth operational amplifier U10 and an end of the 7th capacitor C 7 simultaneously, the other end of the 7th capacitor C 7 is connected with an end of the 17 resistance R 17, and the other end of the 17 resistance R 17 is the output of the 3rd operation amplifier circuit (1-2-3); Four-operational amplifier circuit (1-2-4) is by the 18 resistance R the 18 to the 20 resistance R 21, the 8th capacitor C 8 and the 11 operational amplifier U11 form, one end of the 18 resistance R 18 of four-operational amplifier circuit (1-2-4) and the in-phase input end of the 11 operational amplifier U11 are connected to the input of four-operational amplifier circuit (1-2-4), the other end ground connection of the 18 resistance R 18, the inverting input of the 11 operational amplifier U11 is connected with an end of the 19 resistance R 19 and an end of the 20 resistance R 20 simultaneously, the other end ground connection of the 19 resistance R 19, the other end of the 20 resistance R 20 is connected with the output of the 11 operational amplifier U11 and an end of the 8th capacitor C 8 simultaneously, the other end of the 8th capacitor C 8 is connected with an end of the 21 resistance R 21, and the other end of the 21 resistance R 21 is the output of four-operational amplifier circuit (1-2-4); First operation amplifier circuit (1-2-1) to the circuit of four-operational amplifier circuit (1-2-4) is formed identical with syndeton.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200635410U CN201937548U (en) | 2011-03-11 | 2011-03-11 | Self-adapting distributive optical fiber temperature measuring laser detection amplifier |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200635410U CN201937548U (en) | 2011-03-11 | 2011-03-11 | Self-adapting distributive optical fiber temperature measuring laser detection amplifier |
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| CN201937548U true CN201937548U (en) | 2011-08-17 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102122920A (en) * | 2011-03-11 | 2011-07-13 | 黑龙江科技学院 | Adaptive distributed type optical fiber temperature-measuring laser detection amplifier |
| CN109459141A (en) * | 2018-12-18 | 2019-03-12 | 山西德润翔电力科技有限公司 | Double color infrared ray device |
| CN110865674A (en) * | 2019-11-21 | 2020-03-06 | 北京轩宇空间科技有限公司 | Method and device for adjusting bias voltage of photoelectric detector and photoelectric detection system |
-
2011
- 2011-03-11 CN CN2011200635410U patent/CN201937548U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102122920A (en) * | 2011-03-11 | 2011-07-13 | 黑龙江科技学院 | Adaptive distributed type optical fiber temperature-measuring laser detection amplifier |
| CN102122920B (en) * | 2011-03-11 | 2012-12-19 | 黑龙江科技学院 | Adaptive distributed type optical fiber temperature-measuring laser detection amplifier |
| CN109459141A (en) * | 2018-12-18 | 2019-03-12 | 山西德润翔电力科技有限公司 | Double color infrared ray device |
| CN109459141B (en) * | 2018-12-18 | 2024-04-30 | 山西德润翔电力科技有限公司 | Dual-color infrared temperature measuring device |
| CN110865674A (en) * | 2019-11-21 | 2020-03-06 | 北京轩宇空间科技有限公司 | Method and device for adjusting bias voltage of photoelectric detector and photoelectric detection system |
| CN110865674B (en) * | 2019-11-21 | 2022-04-22 | 北京轩宇空间科技有限公司 | Method and device for adjusting bias voltage of photoelectric detector and photoelectric detection system |
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