CN112994633B - Photoelectric induction circuit and device for wind tunnel ballistic target free flight model detection - Google Patents
Photoelectric induction circuit and device for wind tunnel ballistic target free flight model detection Download PDFInfo
- Publication number
- CN112994633B CN112994633B CN202110211112.1A CN202110211112A CN112994633B CN 112994633 B CN112994633 B CN 112994633B CN 202110211112 A CN202110211112 A CN 202110211112A CN 112994633 B CN112994633 B CN 112994633B
- Authority
- CN
- China
- Prior art keywords
- signal
- resistor
- circuit
- module
- power supply
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/45—Differential amplifiers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/06—Measuring arrangements specially adapted for aerodynamic testing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
Abstract
The invention relates to a photoelectric sensing circuit and a device for detecting a free flight model of a wind tunnel ballistic target, wherein the photoelectric sensing circuit comprises a photoelectric conversion module, a signal amplification module, a signal shaping module and a peripheral power supply module; the photoelectric conversion module comprises a photoelectric detector and a voltage sampling circuit; the photoelectric detector adopts a reverse bias light guide mode and is used for receiving the light flux change and generating a current signal; the voltage sampling circuit is used for converting the current signal into a voltage signal and outputting the voltage signal to the signal amplification module; the signal amplification module comprises a first-stage amplification circuit, a filter circuit and a second-stage amplification circuit, the first-stage amplification circuit is used for amplifying the voltage signal, the filter voltage is used for filtering out direct-current components in the voltage signal, and the second-stage amplification circuit is used for performing reverse amplification on the voltage signal and outputting the voltage signal to the signal shaping module; and the signal shaping module is used for shaping the voltage signal into a square wave detection signal and outputting the square wave detection signal. The invention can quickly realize the non-contact detection of the ballistic target free flight model.
Description
Technical Field
The invention relates to the technical field of wind tunnel measurement, in particular to a photoelectric induction circuit and a photoelectric induction device for wind tunnel ballistic target free flight model detection.
Background
The ballistic target is an important ground wind tunnel measuring device for researching hypersonic aerodynamics and superspeed collision phenomena, is suitable for ground simulation tests of aerospace flight models, and is characterized in that the model for the test freely flies in a target way at superspeed, and meanwhile, the ballistic target is provided with various types of measuring devices to measure various parameters of the free-flying model. For the free flight model, since an effective working area when the free flight model reaches the measurement device cannot be predicted in advance, it is necessary to measure the arrival time by using a non-contact photoelectric sensing technology. Particularly, in a model of ultra-high-speed flight, the time for passing through a ballistic target laser beam is usually in the order of microseconds or hundreds of nanoseconds, and the response frequency of a conventional photovoltaic mode is not enough to meet the requirement of ultra-high-speed detection.
Disclosure of Invention
The invention aims to overcome at least some of the defects and provides a photoelectric sensing circuit which is simple in structure, stable in performance and low in cost, so that non-contact detection of a super-high-speed free flight model in a ballistic target is realized.
In order to achieve the above object, the present invention provides a photoelectric sensing circuit for wind tunnel ballistic target free flight model detection, comprising:
the device comprises a photoelectric conversion module, a signal amplification module, a signal shaping module and a peripheral power supply module; the photoelectric conversion module comprises a photoelectric detector and a voltage sampling circuit; the photoelectric detector adopts a reverse bias light guide mode and is used for receiving the change of the light flux by a light sensing surface and generating a current signal according to a changed light signal; the voltage sampling circuit is used for converting the current signal generated by the photoelectric detector into a voltage signal and outputting the voltage signal to the signal amplification module;
the signal amplification module comprises a first-stage amplification circuit, a filter circuit and a second-stage amplification circuit; the first-stage amplifying circuit is used for carrying out positive-phase amplification on an input voltage signal and outputting the amplified voltage signal to the filter circuit, the filter voltage is used for filtering out a direct-current component in the amplified voltage signal and outputting the filtered voltage signal to the second-stage amplifying circuit, and the second-stage amplifying circuit is used for carrying out reverse-phase amplification on the filtered voltage signal and outputting the amplified voltage signal to the signal shaping module;
the signal shaping module is used for shaping an input voltage signal into a square wave detection signal and outputting the square wave detection signal;
and the peripheral power supply module is connected with the photoelectric conversion module, the signal amplification module and the signal shaping module and is used for supplying power in a centralized manner.
Preferably, the device further comprises an interface module, and the peripheral power supply module is connected with the photoelectric conversion module, the signal amplification module and the signal shaping module through the interface module; the interface module is also used for outputting the shaped square wave detection signal.
Preferably, the interface module is further configured to output the voltage signal amplified by the second-stage amplifying circuit.
Preferably, the photoelectric conversion module further comprises a first resistor R1, a second resistor R2 and a first capacitor C1;
the cathode of the photodetector is connected with a power supply VDD through the second resistor R2, and is connected with the ground wire through the first capacitor C1, and the anode of the photodetector is connected with the ground wire through the first resistor R1;
the voltage sampling circuit comprises a sampling resistor R3, one end of the sampling resistor R3 is connected with the anode of the photoelectric detector, and the other end of the sampling resistor R3 is connected with the first-stage amplifying circuit.
Preferably, the first stage amplifying circuit comprises a first amplifier U1, a negative ground resistor R4 and a first negative feedback resistor R5;
a first power supply end of the first amplifier U1 is connected with a power supply VDD, a second power supply end is connected with a negative power supply VEE, a signal input positive electrode is connected with the photoelectric conversion module, a signal input negative electrode is connected with a ground wire through a negative grounding resistor R4 and is connected with an output end through a first negative feedback resistor R5;
the output of the first amplifier U1 is connected to the filter circuit.
Preferably, the filter circuit comprises a filter resistor R6 and a filter capacitor C2;
one end of the filter capacitor C2 is connected with the output end of the first amplifier U1, the other end is connected with the second stage amplification circuit, and the filter capacitor C2 is connected with the ground wire through the filter resistor R6.
Preferably, the second stage amplifying circuit comprises a second amplifier U2, a seventh resistor R7 and a second negative feedback resistor;
a first power supply end of the second amplifier U2 is connected with a power supply VDD, a second power supply end is connected with a negative power supply VEE, a signal input positive electrode is connected with a ground wire through the seventh resistor R7, a signal input negative electrode is connected with the filter capacitor C2 and is connected with an output end through a second negative electrode feedback resistor; the resistance value of the second negative electrode feedback resistor can be adjusted;
the output of the second amplifier U2 is connected to the signal shaping module.
Preferably, the second negative feedback resistor comprises a first relay S1, a second relay S2, an eighth resistor R8, a ninth resistor R9 and a tenth resistor R10;
the first relay S1 and the second relay S2 both comprise a first connecting end and a second connecting end which can be switched;
the input end of the second relay S2 is connected with the signal input negative electrode of the second amplifier U2, the first connection end is connected with the input end of the first relay S1, and the second connection end is connected with the output end of the second amplifier U2 through a tenth resistor R10; a first connection end of the first relay S1 is connected to the output end of the second amplifier U2 through an eighth resistor R8, and a second connection end is connected to the output end of the second amplifier U2 through a ninth resistor R9.
Preferably, the signal shaping module comprises a high-speed comparator U3, a sliding resistor R11, a monostable trigger U4, a third capacitor C3, a twelfth resistor R12 to a fifteenth resistor R15;
the signal input anode of the high-speed comparator U3 is connected with the second-stage amplifying circuit, the signal input cathode is connected with a ground wire through a sliding resistor R11, a variable pin of the sliding resistor R11 is connected with an analog power supply VCC and is connected with a first power supply end of the high-speed comparator U3, and a second power supply end of the high-speed comparator U3 is connected with the ground wire;
a power supply pin VCC of the monostable trigger U4 is connected with an analog power supply VCC through a fourteenth resistor R14, an external capacitance-resistance pin RT/CT is connected with the power supply pin VCC through a thirteenth resistor R13, and an external capacitance pin CT is connected with an external capacitance-resistance pin RT/CT through a third capacitor C3; the first signal input trigger end A1 is connected with the output end of the high-speed comparator U3, the second signal input trigger end A2 is connected with the ground wire through a twelfth resistor R12, and the positive pulse output end Q outputs the square wave detection signal through a fifteenth resistor R15.
The invention also provides a photoelectric sensing device for detecting the wind tunnel ballistic target free flight model, which comprises a laser light curtain, measuring equipment and the photoelectric sensing circuit;
the laser light curtain is arranged in a measuring area, and the photoelectric sensing circuit is used for receiving a light signal of the laser light curtain by a photoelectric detector and outputting a square wave detection signal to the measuring equipment.
The technical scheme of the invention has the following advantages: the invention provides a photoelectric induction circuit and a photoelectric induction device for detecting a free flight model of a wind tunnel ballistic target, which realize non-contact detection signal acquisition of an ultra-high-speed free flight model through photoelectric conversion, voltage sampling, signal amplification and signal shaping; the photoelectric detector adopts a reverse bias light guide mode, is sensitive to the change speed of laser luminous flux, and can realize ultrahigh-speed response to ultrahigh-speed flight model detection by combining circuit modules such as signal amplification, signal filtering, signal shaping and the like; meanwhile, the photoelectric sensing circuit and the device provided by the invention have simple functional modules and reliable performance, reduce the non-contact detection cost of the ultra-high-speed free flight model to the maximum extent, and can be installed and used on the trajectory of the free flight model in a large quantity, thereby forming long-distance trajectory free flight model detection and measurement.
Drawings
FIG. 1 is a schematic structural diagram of a photoelectric induction circuit for wind tunnel ballistic target free flight model detection in an embodiment of the invention;
FIG. 2 is a schematic circuit diagram of a photoelectric conversion module according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a first stage amplifier circuit according to an embodiment of the invention;
FIG. 4 is a schematic diagram of a filter circuit according to an embodiment of the invention;
FIG. 5 is a schematic diagram of a second stage amplifier circuit according to an embodiment of the invention;
FIG. 6 is a circuit diagram of a signal shaping module according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a photoelectric induction circuit for wind tunnel ballistic target free flight model detection in an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
As shown in fig. 1 to 7, an embodiment of the present invention provides a photoelectric sensing circuit for wind tunnel ballistic target free flight mode detection, including: the device comprises a photoelectric conversion module, a signal amplification module, a signal shaping module and a peripheral power supply module. Specifically, wherein:
the photoelectric conversion module includes a photodetector D1 and a voltage sampling circuit. The photodetector D1 adopts a reverse biased light guide mode, and is connected to the photoelectric sensing circuit, and the photodetector D1 is configured to receive a change in light flux with its photosensitive surface, and generate a current signal according to a light signal caused by the received change in light flux. The voltage sampling circuit is used for converting the current signal generated by the photodetector D1 into a voltage signal and outputting the voltage signal to the signal amplification module. The photodetectors D1 are conventional in the art, and their specific number, type, etc. can be selected as required, and are not described herein again.
The signal amplification module comprises a first-stage amplification circuit, a filter circuit and a second-stage amplification circuit. The first-stage amplifying circuit is used for carrying out positive-phase amplification on the input voltage signal converted by the voltage sampling circuit and outputting the voltage signal to the filter circuit. The filtering voltage is used for filtering out direct current components in the voltage signals amplified by the first-stage amplifying circuit and outputting the direct current components to the second-stage amplifying circuit. The second-stage amplifying circuit is used for carrying out reverse-phase amplification on the filtered voltage signal and outputting the voltage signal to the signal shaping module.
And the signal shaping module is used for shaping the input voltage signal amplified by the second-stage amplifying circuit into a square wave detection signal, outputting the square wave detection signal and driving other measuring equipment.
The peripheral power supply module is connected with the photoelectric conversion module, the signal amplification module and the signal shaping module and is used for realizing centralized power supply of the photoelectric conversion module, the signal amplification module and the signal shaping module.
Preferably, the photoelectric sensing circuit for wind tunnel ballistic target free flight model detection further comprises an interface module, the peripheral power supply module is connected with the photoelectric conversion module, the signal amplification module and the signal shaping module through the interface module, and the interface module is further used for realizing the output function of the shaped square wave detection signal, namely, outputting the shaped square wave detection signal to other measuring equipment as a free flight model detection signal.
Furthermore, the interface module is also used for outputting the voltage signal amplified by the second-stage amplifying circuit. The photoelectric detector D1 is sensitive to the light flux of the free flight model shielding visible light wavelength laser light curtain, and the voltage change amplitude of the current signal generated by the photoelectric detector D1 after being converted into a voltage signal is consistent with the shielding real object of the free flight model, so the circuit also has the function of identifying the outline of the free flight model. After the voltage signal is amplified by the second-stage amplifying circuit, the high-frequency part of the voltage signal is consistent with the light flux change of the photoelectric detector D1, when the free flight model body shields the laser light curtain, the laser beam which is not shielded still irradiates on the photosensitive surface of the photoelectric detector D1, so that the trend of the electric signal generated by the photoelectric detector D1 is consistent with the light flux of the laser light curtain of the free flight model passing through the visible light wavelength, and therefore, the circuit can also carry out free flight model outline identification through the voltage signal amplified by the second-stage amplifying circuit.
Preferably, as shown in fig. 2, the photoelectric conversion module further includes a first resistor R1, a second resistor R2, and a first capacitor C1. The cathode of the photodetector D1 is connected to the power supply VDD through a second resistor R2, the cathode of the photodetector D1 is further connected to the ground through a first capacitor C1, and the anode of the photodetector D1 is connected to the ground through a first resistor R1. The voltage sampling circuit comprises a sampling resistor R3, one end of the sampling resistor R3 is connected with the anode of the photoelectric detector, and the other end of the sampling resistor R3 is connected with the first-stage amplifying circuit in the signal amplifying module.
Preferably, as shown in fig. 3, the first stage amplifying circuit includes a first amplifier U1, a negative ground resistor R4, and a first negative feedback resistor R5. A first power supply terminal (i.e., a pin numbered 7 in the first amplifier U1 in fig. 3) of the first amplifier U1 is connected to the power supply VDD, a second power supply terminal (i.e., a pin numbered 4 in the first amplifier U1 in fig. 3) is connected to the negative power supply VEE, a positive signal input terminal (i.e., a pin numbered 3 in the first amplifier U1 in fig. 3) of the first amplifier U1 is connected to the photoelectric conversion module (i.e., the other terminal of the sampling resistor R3), a negative signal input terminal (i.e., a pin numbered 2 in the first amplifier U1 in fig. 3) of the first amplifier U1 is connected to the ground through a negative ground resistor R4, and a negative terminal of the first amplifier U1 is connected to an output terminal (i.e., a pin numbered 6 in the first amplifier U1 in fig. 3) of the first amplifier U1 through a first negative feedback resistor R5. The output of the first amplifier U1 is connected to a filter circuit.
Further, as shown in fig. 4, the filter circuit may be a rc filter circuit, which includes a filter resistor R6 and a filter capacitor C2. One end of the filter capacitor C2 is connected with the output end of the first amplifier U1, the other end is connected with the second stage amplification circuit, and the filter capacitor C2 is connected with the ground wire through the filter resistor R6.
Further, as shown in fig. 5, the second stage amplifying circuit includes a second amplifier U2, a seventh resistor R7, and a second negative feedback resistor. A first power supply terminal (i.e., pin No. 7 in the second amplifier U2 in fig. 5) of the second amplifier U2 is connected to the power supply VDD, a second power supply terminal (i.e., pin No. 4 in the second amplifier U2 in fig. 5) is connected to the negative power supply VEE, a positive signal input terminal (i.e., pin No. 3 in the second amplifier U2 in fig. 5) of the second amplifier U2 is connected to the ground through a seventh resistor R7, a negative signal input terminal (i.e., pin No. 2 in the second amplifier U2 in fig. 5) of the second amplifier U2 is connected to the filter capacitor C2 (and to the ground through a filter resistor R6), and a negative signal input terminal of the second amplifier U2 is connected to an output terminal (i.e., pin No. 6 in the second amplifier U2 in fig. 5) of the second amplifier U2 through a second negative feedback resistor. The output of the second amplifier U2 is connected to a signal shaping module. The resistance value of the second cathode feedback resistor can be adjusted.
Preferably, in order to adjust the second negative feedback resistance to realize different amplification factors, the second negative feedback resistance includes a first relay S1, a second relay S2, an eighth resistor R8, a ninth resistor R9 and a tenth resistor R10, wherein the first relay S1 includes a first connection terminal (i.e., pin numbered 1 in the first relay S1 in fig. 5) and a second connection terminal (i.e., pin numbered 2 in the first relay S1 in fig. 5) which can be switched, and the first relay S1 is identical in structure to the second relay S2.
As shown in fig. 5, the input terminal of the second relay S2 is connected to the negative signal input terminal of the second amplifier U2, the first connection terminal of the second relay S2 is connected to the input terminal of the first relay S1, and the second connection terminal of the second relay S2 is connected to the output terminal of the second amplifier U2 through the tenth resistor R10; the first connection end of the first relay S1 is connected to the output end of the second amplifier U2 through an eighth resistor R8, and the second connection end of the first relay S1 is connected to the output end of the second amplifier U2 through a ninth resistor R9.
Preferably, the first amplifier U1 is in a positive phase amplification state, and the amplification factor of the first stage amplification circuit is 10 times; the second amplifier U2 is in the reverse amplification state, and the amplification factor of the second stage amplification circuit is adjustable in three steps of 10 times, 65 times or 236 times. The two-stage amplifying circuit adopts a positive amplifying mode and a negative amplifying mode, the drift of voltage signals can be restrained, and the adjusting mode of the amplifying times of the second-stage amplifying circuit can be program control or local adjustment.
Preferably, as shown in fig. 6, the signal shaping module includes a high-speed comparator U3, a sliding resistor R11, a monostable flip-flop U4, a third capacitor C3, a twelfth resistor R12 to a fifteenth resistor R15. The signal input anode of the high-speed comparator U3 is connected with the second-stage amplifying circuit, the signal input cathode of the high-speed comparator U3 is connected with the ground wire through a sliding resistor R11, a variable pin of the sliding resistor R11 is connected with an analog power supply VCC and a first power supply end of the high-speed comparator U3, and a second power supply end of the high-speed comparator U3 is connected with the ground wire.
A power supply pin VCC of the monostable trigger U4 is connected with an analog power supply VCC through a fourteenth resistor R14; an external capacitance-resistance pin RT/CT of the monostable trigger U4 is connected with an analog power supply VCC through a thirteenth resistor R13 and a fourteenth resistor R14 which are connected in series, namely the external capacitance-resistance pin RT/CT is connected with a power supply pin VCC of the monostable trigger U4 through a thirteenth resistor R13; an external capacitor pin CT of the monostable trigger U4 is connected with an external capacitor resistor pin RT/CT of the monostable trigger U4 through a third capacitor C3; the first signal input trigger end A1 of the monostable trigger U4 is connected with the output end of the high-speed comparator U3; a second signal input trigger end A2 of the monostable trigger U4 is connected with the ground wire through a twelfth resistor R12; the positive pulse output end Q of the monostable trigger U4 outputs a square wave detection signal through a fifteenth resistor R15.
The sliding resistor R11 is used for setting a comparison threshold, when the amplitude of the voltage signal exceeds the comparison threshold, the exceeding part of the voltage signal is used as an effective signal for comparison and shaping, the voltage signal is converted into a pulse signal, the width and the amplitude of the pulse signal at the moment are consistent with the pulse width of the voltage signal amplified by the second-stage amplifying circuit, therefore, the faster the free flight model speed is, the faster the change rate of the light-induced luminous flux of the photoelectric detector D1 is, the narrower the pulse widths of the voltage signal and the pulse signal are, and the pulse width of the voltage signal is shaped into a standard square wave signal through the monostable trigger U4 to be output.
In a preferred embodiment, as shown in fig. 7, the power supply VDD is preferably +12.0V, the capacitance of the first capacitor C1 is preferably 0.1 μ F, the resistance of the first resistor R1 is preferably 5.1k Ω, the resistance of the second resistor R2 is preferably 15k Ω, and the resistance of the sampling resistor R3 is preferably 200 Ω.
The negative power source VEE is preferably-12.0V, the negative ground resistor R4 is preferably 51 Ω, and the first negative feedback resistor R5 is preferably 470 Ω. The capacitance value of the filter capacitor C2 is preferably 0.1 muF, and the resistance value of the filter resistor R6 is preferably 51 omega. The resistance of the seventh resistor R7 is preferably 51 Ω. The eighth resistor R8 preferably has a resistance of 470 Ω, the ninth resistor R9 preferably has a resistance of 3.3k Ω, and the tenth resistor R10 preferably has a resistance of 12k Ω.
The analog power source VCC is preferably 5.0V, the resistance of the twelfth resistor R12 is preferably 200 Ω, the resistance of the thirteenth resistor R13 is preferably 40k Ω, the resistance of the fourteenth resistor R14 is preferably 10 Ω, and the resistance of the fifteenth resistor R15 is preferably 200 Ω.
The photoelectric sensing circuit provided by the invention is sensitive to the change of luminous flux, has quick response to a light signal changing at a high speed, and is particularly suitable for free flight model detection of wind tunnel ballistic target equipment. The photoelectric sensing circuit adopts a reverse bias circuit structure in the photoelectric conversion module, and the value of the first resistor R1 determines the amplitude of an electric signal generated by the photoelectric conversion module. The original photoelectric signal is preliminarily amplified in a first-stage amplifying circuit of the signal amplifying module, and the corresponding cathode grounding resistor R4 and the first cathode feedback resistor R5 determine the amplification factor, which is usually about ten times of the original photoelectric signal. Because the flying speed of the free flight model on the wind tunnel ballistic target is higher and the ratio of high frequency in photoelectric signals is higher, the pass frequency is determined by the filter capacitor C2 and the filter resistor R6 in the filter circuit, so that the signal with the faster luminous flux change enters the second-stage amplification circuit, the signal amplification required by the actual situation is finished, and other stray signals are restrained. And a circuit in the signal shaping module shapes the electric signal into a standard square signal through the numerical value of a corresponding device so as to be used by other equipment, and finally non-contact detection of the ultra-high-speed free flight model in the wind tunnel ballistic target is realized.
The invention also provides a photoelectric sensing device for detecting the wind tunnel ballistic target free flight model, which comprises a laser light curtain, measuring equipment, a photoelectric sensing circuit and the laser light curtain, wherein the photoelectric sensing circuit and the laser light curtain are in any one of the above embodiments; the laser light curtain is arranged in the measuring area, and the photoelectric sensing circuit is used for receiving a light signal of the laser light curtain by the photoelectric detector and outputting a square wave detection signal to the measuring equipment.
Preferably, the laser light curtain with the thickness of 2mm and the width of 50mm-1000mm can be formed by using laser beams with the visible light wavelength ranging from 390nm to 780nm, and the photoelectric detector D1 uses a photoelectric detector with the visible light wavelength ranging from 390nm to 780 nm.
When the ultra-high-speed free flight model passes through the laser light curtain to be shielded, the laser is switched on and off or the light intensity is changed, the photoelectric detector D1 works in a reverse bias mode, meanwhile, the visible light wavelength laser beam (of the laser light curtain) irradiates the photosensitive surface of the photoelectric detector D1, a voltage difference is formed between two ends of the photoelectric detector D1, when the visible light wavelength laser beam is shielded, the photosensitive surface of the photoelectric detector D1 receives the change of the luminous flux, so that the current at the input end of the first resistor R1 has a difference value, the difference value is a current signal generated by the photoelectric detector D1, the current signal is converted into a voltage signal through the sampling resistor R3 and the first amplifier U1, the voltage signal is injected into the anode of the first amplifier U1 in the first-stage amplifying circuit, and the first cathode feedback resistor R5 and the cathode grounding resistor R4 connected with the first amplifier U1 form 10-fold amplification to amplify the voltage signal, the amplified voltage signal passes through a resistance-capacitance coupling filter circuit formed by combining a filter resistor R6 and a filter capacitor C2, a low-frequency signal is filtered, a high-frequency signal generated by a photoelectric detector D1 is reserved, the high-frequency signal is injected into the signal input negative electrode of a second amplifier U2 in a second-stage amplification circuit, the inverse amplification of the voltage signal is formed, and signal drift is inhibited.
In the second amplifier U2, the corresponding eighth resistor R8 or ninth resistor R9 or tenth resistor R10 may be selected by operating the first relay S1 and the first relay S2 according to actual requirements, thereby forming a 10-fold or 65-fold or 236-fold amplification. After the voltage signal is amplified for the second time, the voltage signal is injected into a high-speed comparator U3 to be shaped into a pulse signal, then the pulse signal is injected into a monostable trigger U4 to be shaped into a square wave signal with the pulse width of 18us, and finally the square wave signal is output as a free flight model detection signal.
After the voltage signal is amplified by the second-stage amplifying circuit, the high-frequency part of the voltage signal is consistent with the light flux change of the photoelectric detector D1, when the free flight model body shields the laser light curtain, the laser beam which is not shielded still irradiates on the light-sensitive surface of the photoelectric detector D1, therefore, the trend of the electric signal generated by the photoelectric detector D1 is consistent with the light flux of the laser light curtain which passes through the visible light wavelength by the free flight model, and the shape and contour identification of the free flight model can be carried out through the voltage signal amplified by the second-stage amplifying circuit.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (4)
1. A photoelectric sensing circuit for wind tunnel ballistic target free flight model detection, comprising: the device comprises a photoelectric conversion module, a signal amplification module, a signal shaping module and a peripheral power supply module; wherein the content of the first and second substances,
the photoelectric conversion module comprises a photoelectric detector and a voltage sampling circuit; the photoelectric detector adopts a reverse bias light guide mode and is used for receiving the change of light flux by a light sensitive surface and generating a current signal according to a changed light signal; the voltage sampling circuit is used for converting the current signal generated by the photoelectric detector into a voltage signal and outputting the voltage signal to the signal amplification module;
the signal amplification module comprises a first-stage amplification circuit, a filter circuit and a second-stage amplification circuit; the first-stage amplifying circuit is used for carrying out positive-phase amplification on an input voltage signal and outputting the amplified voltage signal to the filter circuit, the filter circuit is used for filtering out a direct-current component in the amplified voltage signal and outputting the direct-current component to the second-stage amplifying circuit, and the second-stage amplifying circuit is used for carrying out reverse-phase amplification on the filtered voltage signal and outputting the amplified voltage signal to the signal shaping module;
the signal shaping module is used for shaping the input voltage signal into a square wave detection signal and outputting the square wave detection signal;
the peripheral power supply module is connected with the photoelectric conversion module, the signal amplification module and the signal shaping module and is used for supplying power in a centralized manner;
the photoelectric conversion module further comprises a first resistor R1, a second resistor R2 and a first capacitor C1;
the cathode of the photoelectric detector is connected with a power supply VDD through the second resistor R2 and is connected with the ground wire through the first capacitor C1, and the anode of the photoelectric detector is connected with the ground wire through the first resistor R1;
the voltage sampling circuit comprises a sampling resistor R3, one end of the sampling resistor R3 is connected with the anode of the photodetector, and the other end of the sampling resistor R3 is connected with the first-stage amplifying circuit;
the power supply VDD is +12.0V, the capacitance value of the first capacitor C1 is 0.1 muF, the resistance value of the first resistor R1 is 5.1k omega, the resistance value of the second resistor R2 is 15k omega, and the resistance value of the sampling resistor R3 is 200 omega;
the first stage amplifying circuit comprises a first amplifier U1, a negative electrode grounding resistor R4 and a first negative electrode feedback resistor R5;
a first power supply end of the first amplifier U1 is connected with a power supply VDD, a second power supply end is connected with a negative power supply VEE, a signal input positive electrode is connected with the photoelectric conversion module, a signal input negative electrode is connected with a ground wire through a negative grounding resistor R4 and is connected with an output end through a first negative feedback resistor R5;
the output end of the first amplifier U1 is connected to the filter circuit;
the filter circuit comprises a filter resistor R6 and a filter capacitor C2;
one end of the filter capacitor C2 is connected with the output end of the first amplifier U1, the other end of the filter capacitor C2 is connected with the second-stage amplifying circuit, and the filter capacitor C2 is connected with the ground wire through the filter resistor R6;
the second stage of amplification circuit comprises a second amplifier U2, a seventh resistor R7 and a second negative feedback resistor;
a first power supply end of the second amplifier U2 is connected with a power supply VDD, a second power supply end is connected with a negative power supply VEE, a signal input positive electrode is connected with a ground wire through the seventh resistor R7, a signal input negative electrode is connected with the filter capacitor C2 and is connected with an output end through a second negative electrode feedback resistor; the resistance value of the second negative electrode feedback resistor can be adjusted;
the output end of the second amplifier U2 is connected to the signal shaping module;
the second negative feedback resistor comprises a first relay S1, a second relay S2, an eighth resistor R8, a ninth resistor R9 and a tenth resistor R10;
the first relay S1 and the second relay S2 both comprise a first connecting end and a second connecting end which can be switched;
the input end of the second relay S2 is connected with the signal input negative electrode of the second amplifier U2, the first connection end is connected with the input end of the first relay S1, and the second connection end is connected with the output end of the second amplifier U2 through a tenth resistor R10; a first connection end of the first relay S1 is connected to the output end of the second amplifier U2 through an eighth resistor R8, and a second connection end is connected to the output end of the second amplifier U2 through a ninth resistor R9;
the signal shaping module comprises a high-speed comparator U3, a sliding resistor R11, a monostable trigger U4, a third capacitor C3, a twelfth resistor R12 to a fifteenth resistor R15;
the signal input anode of the high-speed comparator U3 is connected with the second-stage amplifying circuit, the signal input cathode is connected with a ground wire through a sliding resistor R11, a variable pin of the sliding resistor R11 is connected with an analog power supply VCC and is connected with a first power supply end of the high-speed comparator U3, and a second power supply end of the high-speed comparator U3 is connected with the ground wire;
a power supply pin VCC of the monostable trigger U4 is connected with an analog power supply VCC through a fourteenth resistor R14, an external capacitance-resistance pin RT/CT is connected with the power supply pin VCC through a thirteenth resistor R13, and an external capacitance pin CT is connected with an external capacitance-resistance pin RT/CT through a third capacitor C3; the first signal input trigger end A1 is connected with the output end of the high-speed comparator U3, the second signal input trigger end A2 is connected with the ground wire through a twelfth resistor R12, and the positive pulse output end Q outputs the square wave detection signal through a fifteenth resistor R15.
2. The photoelectric induction circuit for wind tunnel ballistic target free flight model detection according to claim 1, characterized in that:
the peripheral power supply module is connected with the photoelectric conversion module, the signal amplification module and the signal shaping module through the interface module; the interface module is also used for outputting the shaped square wave detection signal.
3. The photoelectric induction circuit for wind tunnel ballistic target free flight model detection according to claim 2, characterized in that:
the interface module is also used for outputting the voltage signal amplified by the second-stage amplifying circuit.
4. A photoelectric sensing device for detecting a free flight model of a wind tunnel ballistic target is characterized in that: comprising a laser light curtain, a measuring device and a photoelectric sensing circuit according to any of claims 1-3;
the laser light curtain is arranged in a measuring area, and the photoelectric sensing circuit is used for receiving a light signal of the laser light curtain by a photoelectric detector and outputting a square wave detection signal to the measuring equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110211112.1A CN112994633B (en) | 2021-02-25 | 2021-02-25 | Photoelectric induction circuit and device for wind tunnel ballistic target free flight model detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110211112.1A CN112994633B (en) | 2021-02-25 | 2021-02-25 | Photoelectric induction circuit and device for wind tunnel ballistic target free flight model detection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112994633A CN112994633A (en) | 2021-06-18 |
| CN112994633B true CN112994633B (en) | 2022-06-03 |
Family
ID=76350586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110211112.1A Active CN112994633B (en) | 2021-02-25 | 2021-02-25 | Photoelectric induction circuit and device for wind tunnel ballistic target free flight model detection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112994633B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117665319A (en) * | 2024-01-31 | 2024-03-08 | 中国空气动力研究与发展中心超高速空气动力研究所 | Photoelectric detection device and method suitable for strong self-luminous free flight model |
Citations (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001144683A (en) * | 1999-11-16 | 2001-05-25 | Nec Corp | I-v conversion circuit for optical transmission reception circuit |
| US6335815B1 (en) * | 1997-05-16 | 2002-01-01 | Nec Corporation | Optical receiver |
| JP2006333019A (en) * | 2005-05-25 | 2006-12-07 | Nippon Telegr & Teleph Corp <Ntt> | Photoelectric conversion circuit |
| CN101132114A (en) * | 2007-08-22 | 2008-02-27 | 中国科学院上海光学精密机械研究所 | Continuously adjustable nanosecond-impulse semiconductor laser driving power supply |
| CN101778520A (en) * | 2010-01-08 | 2010-07-14 | 福州大学 | Method for controlling soft switching of zero voltage quasi-square wave BUCK transducer and circuit thereof |
| CN101960941A (en) * | 2010-08-25 | 2011-02-02 | 中国农业大学 | Laser control land leveling receiver circuit |
| CN103036553A (en) * | 2012-12-10 | 2013-04-10 | 青岛歌尔声学科技有限公司 | Photoelectric signal switching circuit and plasma television stylus |
| CN204086578U (en) * | 2014-07-18 | 2015-01-07 | 中国空气动力研究与发展中心超高速空气动力研究所 | The noiseless sniffer of a kind of hypervelocity target |
| CN204203472U (en) * | 2014-11-18 | 2015-03-11 | 西安核仪器厂 | A kind of α, β radiating surface pollution detection device |
| CN104458809A (en) * | 2014-12-01 | 2015-03-25 | 郑州轻工业学院 | Quartz resonance sensitive circuit for recognizing dew point |
| CN104597316A (en) * | 2015-01-08 | 2015-05-06 | 聚光科技(杭州)股份有限公司 | Weak current detecting device and method |
| CN104836542A (en) * | 2015-04-30 | 2015-08-12 | 四川迈迪测控技术有限公司 | Pre-amplifier for measuring wind-tunnel balance signal and calibration measurement method |
| CN205149196U (en) * | 2015-12-08 | 2016-04-13 | 青岛市贤俊龙彩印有限公司 | A disconnected paper detection control circuit for printing machine |
| CN107272012A (en) * | 2017-07-13 | 2017-10-20 | 重庆航天机电设计院 | A kind of laser ranging circuit |
| CN107748523A (en) * | 2017-11-16 | 2018-03-02 | 西安方元明科技股份有限公司 | A kind of laser warning control system |
| CN108955863A (en) * | 2017-05-20 | 2018-12-07 | 天津大学（青岛）海洋工程研究院有限公司 | A kind of novel vibrating frequency sensor system based on voltage multiplier |
| CN109202278A (en) * | 2017-06-29 | 2019-01-15 | 武汉华工激光工程有限责任公司 | Laser welding head energy back device |
| CN208399018U (en) * | 2018-04-26 | 2019-01-18 | 四川聚强创新科技有限公司 | A kind of near-infrared single photon detector |
| CN109253661A (en) * | 2018-10-30 | 2019-01-22 | 中国空气动力研究与发展中心超高速空气动力研究所 | A kind of airbound target detection target assembly and detection method |
| CN110278040A (en) * | 2019-06-28 | 2019-09-24 | 江苏北方湖光光电有限公司 | A kind of high speed weak optical signal receiving module |
| CN111896106A (en) * | 2020-06-18 | 2020-11-06 | 宁波大学 | Weak fluorescent signal detection circuit |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101441138A (en) * | 2009-01-07 | 2009-05-27 | 中南大学 | Test method and system of train pneumatic performance simulation test apparatus |
| CN103954906B (en) * | 2014-04-03 | 2016-08-17 | 武汉点线科技有限公司 | A kind of device and method for relay status detection |
| CN204145419U (en) * | 2014-09-22 | 2015-02-04 | 江苏骏龙电力科技股份有限公司 | High-speed-differential photodetector system |
| CN204392193U (en) * | 2014-11-20 | 2015-06-10 | 中国科学院高能物理研究所 | A kind of amplifying circuit of neutron detector |
-
2021
- 2021-02-25 CN CN202110211112.1A patent/CN112994633B/en active Active
Patent Citations (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6335815B1 (en) * | 1997-05-16 | 2002-01-01 | Nec Corporation | Optical receiver |
| JP2001144683A (en) * | 1999-11-16 | 2001-05-25 | Nec Corp | I-v conversion circuit for optical transmission reception circuit |
| JP2006333019A (en) * | 2005-05-25 | 2006-12-07 | Nippon Telegr & Teleph Corp <Ntt> | Photoelectric conversion circuit |
| CN101132114A (en) * | 2007-08-22 | 2008-02-27 | 中国科学院上海光学精密机械研究所 | Continuously adjustable nanosecond-impulse semiconductor laser driving power supply |
| CN101778520A (en) * | 2010-01-08 | 2010-07-14 | 福州大学 | Method for controlling soft switching of zero voltage quasi-square wave BUCK transducer and circuit thereof |
| CN101960941A (en) * | 2010-08-25 | 2011-02-02 | 中国农业大学 | Laser control land leveling receiver circuit |
| CN103036553A (en) * | 2012-12-10 | 2013-04-10 | 青岛歌尔声学科技有限公司 | Photoelectric signal switching circuit and plasma television stylus |
| CN204086578U (en) * | 2014-07-18 | 2015-01-07 | 中国空气动力研究与发展中心超高速空气动力研究所 | The noiseless sniffer of a kind of hypervelocity target |
| CN204203472U (en) * | 2014-11-18 | 2015-03-11 | 西安核仪器厂 | A kind of α, β radiating surface pollution detection device |
| CN104458809A (en) * | 2014-12-01 | 2015-03-25 | 郑州轻工业学院 | Quartz resonance sensitive circuit for recognizing dew point |
| CN104597316A (en) * | 2015-01-08 | 2015-05-06 | 聚光科技(杭州)股份有限公司 | Weak current detecting device and method |
| CN104836542A (en) * | 2015-04-30 | 2015-08-12 | 四川迈迪测控技术有限公司 | Pre-amplifier for measuring wind-tunnel balance signal and calibration measurement method |
| CN205149196U (en) * | 2015-12-08 | 2016-04-13 | 青岛市贤俊龙彩印有限公司 | A disconnected paper detection control circuit for printing machine |
| CN108955863A (en) * | 2017-05-20 | 2018-12-07 | 天津大学（青岛）海洋工程研究院有限公司 | A kind of novel vibrating frequency sensor system based on voltage multiplier |
| CN109202278A (en) * | 2017-06-29 | 2019-01-15 | 武汉华工激光工程有限责任公司 | Laser welding head energy back device |
| CN107272012A (en) * | 2017-07-13 | 2017-10-20 | 重庆航天机电设计院 | A kind of laser ranging circuit |
| CN107748523A (en) * | 2017-11-16 | 2018-03-02 | 西安方元明科技股份有限公司 | A kind of laser warning control system |
| CN208399018U (en) * | 2018-04-26 | 2019-01-18 | 四川聚强创新科技有限公司 | A kind of near-infrared single photon detector |
| CN109253661A (en) * | 2018-10-30 | 2019-01-22 | 中国空气动力研究与发展中心超高速空气动力研究所 | A kind of airbound target detection target assembly and detection method |
| CN110278040A (en) * | 2019-06-28 | 2019-09-24 | 江苏北方湖光光电有限公司 | A kind of high speed weak optical signal receiving module |
| CN111896106A (en) * | 2020-06-18 | 2020-11-06 | 宁波大学 | Weak fluorescent signal detection circuit |
Non-Patent Citations (3)
| Title |
|---|
| Design of the Receiver in Laser Location System Based on Differential-Mode Amplify;Jiang Ping;《2011 Fourth International Conference on Intelligent Computation Technology and Automation》;20110415;47-50 * |
| 一种光电探测器接口电路的响应特性分析;李川等;《微电子学》;20150420;第45卷(第2期);192-199 * |
| 高精度脉冲激光测距系统的研究设计;蒋钱;《中国优秀博硕士学位论文全文数据库(硕士)信息科技辑》;20160115;第摘要V页、正文第9-10页、正文第24-34页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112994633A (en) | 2021-06-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104075802B (en) | A kind of photon counting-type faint optical signal measurement mechanism of high dynamic range and method | |
| CN112994633B (en) | Photoelectric induction circuit and device for wind tunnel ballistic target free flight model detection | |
| CN104296866A (en) | Interface circuit applied to avalanche photodiode working in linear mode | |
| CN107976667A (en) | A kind of APD detection devices for Full wave shape measurement laser radar | |
| CN107153139A (en) | A kind of optical fibre gyro detection circuit board noise characteristic method of testing | |
| CN206959996U (en) | A kind of single-photon detector of low time jitter | |
| CN201503396U (en) | Atmospheric transmission visibility meter | |
| CN206804152U (en) | A kind of single-photon detector of frequency-tunable | |
| CN108957146A (en) | Impulse electric field detector and application method with sensitivity coefficient self-calibration function | |
| CN205067735U (en) | Laser detection processing circuit | |
| CN109600122A (en) | Variable trans-impedance amplifier current-voltage conversion circuit | |
| CN107024289A (en) | A kind of single-photon detector of low time jitter | |
| CN205246763U (en) | Airtight space electric field measuring equipment | |
| CN204789251U (en) | Leading treatment circuit of signal of particulate matter on -line monitoring appearance based on mie scattering | |
| CN203811692U (en) | Measurement device | |
| CN113504534A (en) | TRTF performance test system of TOF laser and working method thereof | |
| CN204206117U (en) | A kind of amplifier of creatures' physical electric signals circuit of fast detector | |
| Huang et al. | The front-end electronics design for broadband high-sensitive light pulse detection | |
| CN204116404U (en) | A kind of ultra-weak electronic signal measurement by magnification circuit of fast detector | |
| CN110350878B (en) | High-sensitivity current amplifying circuit and chip thereof | |
| CN105043563A (en) | Integral gating single-photon detector integral capacitor discharge circuit and method | |
| CN207502715U (en) | The heterodyne detection of laser system of photoelectric detective circuit and single-ended signal link mode | |
| CN206074123U (en) | Quadrant sensors circuit | |
| CN204013408U (en) | A kind of ultra-weak electronic signal amplification detection circuit | |
| CN203708206U (en) | Pulse signal duty ratio measuring circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |