225 results about "Sawtooth wave" patented technology

The invention discloses a miniature sawtooth generation method based on an artificial intelligence optimization algorithm, and the method comprises the following steps: S1, initializing a generation parameter, and mapping the generation parameter to a high-dimensional complex field; s2, selecting and configuring an algorithm, and optimizing parameters by constructing a target function in a high-dimensional complex field; s3, constructing a neural morphology calculation system, processing the optimized parameters through a neural network and a complex modulation activation function, and generating a preliminary miniature sawtooth waveform; s4, error evaluation is carried out, an error signal is converted from a time domain to a frequency domain for weighted analysis and optimization, and key frequency band parameters are identified and adjusted; s5, adaptively adjusting the issuing frequency and synaptic weight of the neural network, generating parameters through continuous optimization, and circularly adjusting the waveform; and S6, outputting the optimized micro sawtooth waveform. According to the invention, high-precision and high-stability micro sawtooth waveform generation is realized, and the method is suitable for signal processing and application in a complex environment.

The invention belongs to the technical field of flow field optical measurement, and particularly relates to a high-enthalpy plasma gas temperature measurement method, system and device based on an absorption spectrum. Generating a composite modulation signal through a high-frequency sine wave and a low-frequency sawtooth wave, and enabling incident light to pass through a flow field measurement area in parallel through laser modulation and beam shaping; the detector receives the transmission light and converts the transmission light into an electric signal containing harmonic information, the signal acquisition device is used for performing signal acquisition, the phase-locked demodulation algorithm is used for extracting second harmonic, and the temperature is inversely deduced by combining the double-spectral-line temperature measurement method and the Fourier coefficient amplitude ratio of the second harmonic with the HITRAN database. The system comprises a signal driving module, a laser emission module, a detection acquisition module and a temperature measurement module. The device is composed of a signal generator, an in-phase adder and the like, and a laser is matched with a driving power supply to guarantee stable work. According to the scheme, aiming at the problems of weak signal absorption and insufficient signal-to-noise ratio under complex working conditions, the measurement accuracy and reliability are improved by composite modulation, harmonic extraction and a bispectral line algorithm, and an effective means is provided for research on thermal characteristics of the high-enthalpy plasma.

A class D amplifier circuit receives an analog audio signal with a first reference voltage as its center level, and outputs an output pulse signal having a duty cycle that corresponds to the analog audio signal. A bias circuit generates a second reference voltage having a voltage level obtained as a division of the first reference voltage and the power supply voltage. A periodic voltage generating circuit of the class D amplifier circuit generates a periodic voltage having a triangle waveform or otherwise a sawtooth waveform having an amplitude that corresponds to the second reference voltage.

The utility model discloses a sawtooth wave jigger which comprises a rack, an ore dressing groove, a conical hopper, a cam mechanism and a sieve plate, the sieve plate is formed by splicing a plurality of groups of sieve net assemblies, each sieve net assembly comprises a sieve bearing frame, a sieve net and a sieve pressing frame, a fixed steel ring is arranged on the inner wall of the ore dressing groove in a protruding mode, and the sieve bearing frame is detachably connected to the fixed steel ring. The screen is pressed and installed on the screen bearing frame through the screen pressing frame, a positioning groove is formed in the side edge of the screen bearing frame, and a positioning protruding strip is arranged on the other side edge, opposite to the positioning groove, of the screen bearing frame. The screen plate is formed by splicing the multiple sets of screen assemblies, after abrasion and damage occur, the corresponding screen assemblies can be replaced, the whole screen plate does not need to be replaced, operation is easy and convenient, time and labor are saved, the taken-out screen assemblies can be independently replaced with screens to be reused, and the use cost is effectively saved; when the two adjacent screen assemblies are spliced, the positioning protruding strips are clamped into the positioning grooves, and the overall stability and reliability of the screen plate can be effectively improved.

The invention provides an enhanced non-invasive deep brain electrical stimulation system and method based on time interference. The system comprises an enhanced sawtooth wave stimulation waveform; a stimulation circuit supporting the enhanced sawtooth waveform; a finite element simulation subsystem to guide the stimulation pattern. Compared with the traditional time interference based on sine waves, the time interference based on sawtooth waves generates a steeper envelope, so that the stimulation intensity is enhanced. The sawtooth wave spectrum component is more complex and contains more high-frequency components, and a specific constant current source stimulator is needed to ensure that the high-frequency components output constant current without distortion. The system also includes a simulation subsystem that determines stimulation parameters using a corrected finite element method and a stimulation subsystem that stimulates in accordance with the parameters. Compared with traditional sine waves, the non-invasive deep brain electrical stimulation based on sawtooth wave time interference is provided, the stimulation intensity is improved, and a more effective method is provided for non-invasive regulation and control of the brain and intervention of diseases.

The invention discloses a multi-gas synchronous detection device and method based on dual-frequency wavelength modulation and demodulation, and relates to the field of gas detection, the device comprises a light source module, a photoacoustic signal detection module and a data processing module; wherein the light source module outputs an excitation light beam and irradiates the excitation light beam into a gas chamber of the photoacoustic signal detection module; the excitation light beam is a light beam modulated by a sawtooth wave signal and two sine waves with different frequencies; the photoacoustic signal detection module receives photoacoustic signals generated after each gas to be detected in the gas chamber interacts with the excitation light beam and converts the photoacoustic signals into piezoelectric signals; and the data processing module performs secondary harmonic demodulation on the piezoelectric signal to obtain demodulated secondary harmonic data, and further inverts the concentration of the gas to be detected. According to the invention, two sine wave signals with different frequencies are superposed on the basis of a sawtooth wave signal, the frequency distribution of a modulation signal is expanded, and the concentration of gas adjacent to various absorption lines can be accurately detected at the same time.

The invention relates to the technical field of gas leakage monitoring, and discloses an industrial park gas leakage positioning laser on-line monitoring method, which comprises the following steps of: 1, superposing a sawtooth wave signal generated by a scanning signal generation circuit on a driving current generated by a current control circuit, periodic scanning of the output wavelength of the semiconductor laser is realized, and the output wavelength covers the absorption spectral line of the target gas; 2, light beams output by the semiconductor laser are divided into two paths through an optical fiber beam splitter, the light power ratio is 1: 9, and the low-power path penetrates through the calibration pool to obtain a calibration spectrum signal; according to the industrial park gas leakage positioning laser on-line monitoring method provided by the invention, an infrared laser spectrum open type long optical path detection technology and a multi-optical path gas two-dimensional distribution inversion algorithm are combined to obtain horizontal plane two-dimensional distribution data of target gas concentration above the area, and reliable indication of gas leakage positioning can be provided.

The embodiment of the invention provides a converter mode switching control circuit and method, and the circuit comprises a voltage regulation unit circuit, a Buck bridge arm unit control circuit, a Boost bridge arm unit control circuit, and a mode selection circuit. The voltage regulation unit circuit is used for converting an output voltage Vo into an error signal Verror and sending the error signal Verror to the Buck bridge arm unit control circuit and the Boost bridge arm unit control circuit respectively; the sawtooth wave generator outputs a signal vsaw, sends the signal vsaw to the Buck bridge arm unit control circuit, and outputs a Buck bridge arm duty ratio Dy1; the sawtooth wave generator outputs a signal vsaw, sends the signal vsaw to the Boost bridge arm unit control circuit, and outputs a Boost bridge arm duty ratio Dy2; and the mode selection circuit is used for indicating a Boost mode, a Buck mode and a Buck-Boost mode. The invention provides digital and analog control of converter three-mode smooth switching.

A laser phase modulation frequency shift device based on a multi-harmonic microwave synthesizer comprises an upper computer. An upper computer signal is respectively connected with the first microwave generator, the second microwave generator, the third microwave generator, the fourth microwave generator, the first digital phase shifter, the second digital phase shifter, the third digital phase shifter and the fourth digital phase shifter through the microcontroller; the microwave generator generates a microwave signal according to a reference signal source, the microwave signal is subjected to phase shifting through the digital phase shifter and then synthesized into a sawtooth wave signal in the frequency mixer, the sawtooth wave signal is amplified through the power amplifier until the peak value reaches half-wave voltage and then input into the optical fiber electro-optic phase modulator, and frequency shifting is conducted on laser; the spectrum analyzer is connected with the output end of the power amplifier, analyzes the sawtooth wave signals, generates harmonic signals of all orders, and optimizes the frequency shift of the laser; the design has a higher optical signal bandwidth, is more suitable for an optical fiber electro-optic phase modulator, and achieves the maximization of the efficiency of frequency shift laser.

The invention discloses a five-degree-of-freedom piezoelectric robot driven based on the inertia stepping principle, and relates to the technical field of robots, the five-degree-of-freedom piezoelectric robot comprises an upper driving system, a lower driving system, a spherical hinge system, an upper output end, a connecting rod and a driving foot; the spherical hinge system comprises a spherical hinge lower end cover, a joint ball, a joint seat, a spherical hinge friction pair, a pre-tightening bolt and a spherical hinge upper end cover; the upper driving system comprises a plurality of piezoelectric driving units, an upper connecting ring and an upper inertia ring; the lower driving system comprises a plurality of piezoelectric driving units, a lower inertia ring, a lower connecting ring and a lower output end; different sawtooth wave voltage excitation signals are applied to the piezoelectric driving unit, the piezoelectric driving unit can output bending deformation in different directions, the driving foot and the upper output end are made to move under the action of inertia force, and finally linear motion displacement output of the upper output end in the x-axis direction and the y-axis direction and rotary motion displacement output around the x-axis, the y-axis and the z-axis are achieved. The method has wide application potential in the fields of aerospace, optical equipment and the like.

The sawtooth wave impeller tumbler may overcome the limitations of conventional mixers. An ideal solution would combine efficient mixing with ease of operation and cleaning, all while maintaining a high degree of precision and versatility in a wide range of applications. The device may comprise a pattern of internal sawtooth waves that provide for efficient and complete mixing of a solute and a solvent. In one embodiment the sawtooth wave impeller tumbler may comprise a tumbler for use by an individual user. The device may further comprise a plurality of components to improve the case of use and the functionality of the device such as, for example, a handle, a carabiner clip, a mouth cap, a removeable lid, or a support base.

The invention relates to the technical field of power supply circuits, in particular to a pulse constant-current power supply circuit for camera intermittent trigger LED constant-current control, a voltage-adjustable Boost power supply module of the pulse constant-current power supply circuit comprises an oscillator, a power supply management chip U1, a first path error amplifier and a second path error amplifier, and the first path error amplifier is used for adjusting the duty ratio of a PWM signal; the second path error amplifier is used for limiting the maximum current; the pulse constant current module supplies power through an internal BOOST boost power supply or an external constant voltage source; and a processor module. The oscillator is matched with the power management chip U1 to generate a sawtooth wave oscillation signal, the two error amplifiers are used for jointly controlling output, the two error amplifiers are responsible for voltage feedback and current limitation respectively to ensure the stability and safety of the system, the first error amplifier is adjusted through a voltage signal output by the MCU DAC, and the second error amplifier is used for adjusting the voltage signal output by the MCU DAC. And the second error amplifier is used for current detection to prevent an overcurrent condition.

The invention belongs to the technical field of gas concentration detection, and provides a temperature-control-free DFB laser matching multi-absorption peak concentration detection method and a temperature-control-free DFB laser matching multi-absorption peak concentration detection device. The temperature-control-free DFB laser matched multi-absorption-peak concentration detection method comprises the following steps: screening all absorption peaks of detected gas based on an environment temperature range of a DFB laser gas sensor; the wavelength of a DFB laser is adjusted by changing the average driving current of the DFB laser at any ambient temperature within the ambient temperature range of the laser gas sensor, so that the wavelength of the DFB laser is adjusted to be close to the nearest absorption peak wavelength and smaller than the absorption peak wavelength setting range; a sawtooth wave scanning current is superposed on the adjusted average driving current of the DFB laser, so that the wavelength of the DFB laser is periodically scanned, the wavelength scanning range covers the absorption peak wavelength of the detected gas at the corresponding environment temperature, and the concentration of the detected gas is calculated by combining the corresponding absorption peak coefficient.

The invention discloses a photon-assisted measurement system based on sawtooth wave frequency shift, which is characterized in that antenna modules which are arranged at an interval of 1 / 4 microwave signal wavelength receive echo signals of a space, and meanwhile, a laser generates continuous light which enters an electro-optical modulation module; the modulator simultaneously receives an echo signal, a transmitting signal and a low-frequency sawtooth wave frequency shift signal. An optical signal output by the modulator selects a positive first-order sideband through the optical band-pass filter, and two paths of optical signals with mutually orthogonal polarization states are separated through the polarization beam splitter. The optical signals with orthogonal polarization states respectively pass through a low-frequency photoelectric detector and then two paths of low-frequency signals are output, and Doppler frequency shift and arrival angle information of echo signals are obtained by performing digital signal processing on frequencies and phase differences of the two paths of low-frequency signals. The invention can simultaneously measure the angle of arrival and Doppler frequency shift without direction ambiguity, has low structural complexity and is not influenced by microwave signal power.

The invention relates to a four-tube buck-boost switching power supply control circuit, which is characterized in that a switching tube control circuit is designed to collect inductive current and sampling output voltage in a four-tube buck-boost switching power supply circuit, a VCAboost signal and a VCAbuck signal are generated through signal compensation, a duty ratio signal is generated according to a preset sawtooth wave signal VRAMP, and the VCAboost signal and the VCAbuck signal are output. And finally, converting the control signals into control signals corresponding to the four switching tubes respectively, thereby realizing switching of each mode of the four-switching-tube buck-boost power supply circuit. A direct connection stage is added in a buck-boost mode, inductor energy release in mode switching is effectively realized, a large amount of surge current is prevented from passing through the inductor current to cause inductor damage, voltage conversion efficiency and circuit stability are improved, transition between the buck mode and the Boost mode is optimally controlled through the duty ratio, stable change of the duty ratio when a switching tube works is ensured, and the stability of the switching tube is improved. And current fluctuation and loss are avoided.

The invention relates to the technical field of semiconductor laser control, and discloses an automatic frequency stabilization control system of a semiconductor laser, which comprises a lock-in amplifier used for demodulating a frequency discrimination signal; the modulation signal generator is used for outputting a sinusoidal signal or a cosine signal with the frequency of 100kHz and the peak-to-peak value of 40mV, and taking the sinusoidal signal or the cosine signal as a reference signal; the basic current and frequency sweep signal generator is used for adjusting the direct current offset, aligning a wave crest in a frequency discrimination error curve to a scanning midpoint, and outputting a sawtooth wave frequency sweep signal of which the peak value and the frequency can be adjusted; the PID controller is used for stabilizing the frequency discrimination signal to a saturation absorption peak corresponding value; and the automatic frequency stabilization state judgment and controller identifies a target saturated absorption peak through a two-stage peak searching algorithm, and locks the working frequency of the semiconductor laser on the frequency corresponding to the target saturated absorption peak. According to the invention, the operation process of the frequency stabilization system is simplified, and long-term stable operation of the semiconductor laser is ensured.

The invention discloses a device and a method for testing frequency domain characteristics of a high-speed optoelectronic device. The device comprises a laser, a sawtooth wave generator, a signal source, an acousto-optic modulator, an electro-optic intensity modulator, a low-frequency photoelectric detector, a frequency spectrograph and a computer. An electro-optic intensity modulator is driven through a sawtooth wave modulation technology, and frequency-shifted and non-frequency-shifted optical carriers and frequency-shifted and non-frequency-shifted radio frequency optical sidebands are synchronously generated in an optical path in combination with radio frequency signal modulation. And after the signal is subjected to beat frequency processing by the photoelectric detector, the power of the frequency shift signal in different working states is measured by the frequency spectrograph, so that the frequency domain characteristic parameters of the photoelectric device to be measured are obtained. The method is based on sawtooth wave modulation and an amplitude comparison method, frequency domain response characteristics of a single / dual-drive electro-optic intensity modulator, dual-parallel electro-optic intensity modulation and a photoelectric detector can be accurately represented, the test method is simple, and dependence on a high-frequency test instrument is effectively reduced.

The embodiment of the utility model discloses a sawtooth wave generating circuit with high cost performance, which comprises an MCU (Microprogrammed Control Unit), a charge-discharge capacitor, a switch tube and a constant current source for outputting constant current, the output end of the constant current source is connected with one end of the charge-discharge capacitor and the drain electrode of the switch tube, the other end of the charge-discharge capacitor and the source electrode of the switch tube are grounded, and the MCU is connected with the grid electrode of the switch tube. According to the utility model, the required elements are few, and the cost performance is high. The frequency can be adjusted through the single-chip microcomputer, the sawtooth wave amplitude can be adjusted through the resistor R1 and the resistor R2, and debugging is easy.

The invention discloses a penetration detection method of a multi-band modulated wave radar in a non-metal medium. The detection method comprises the following steps: constructing a multi-band hybrid modulated wave radar architecture; the sawtooth wave modulation mode and the triangular wave modulation mode are subjected to alternating or mixed waveform modulation; processing the hybrid modulated wave by adopting a near-field strong clutter suppression algorithm; estimating the distance of the target by adopting a wide-range target rough measurement algorithm; calculating the distance of the target by adopting a short-distance high-precision distance measurement algorithm; performing dynamic compensation on the measurement data by adopting a Kalman filtering state estimation algorithm to obtain a distance estimation result; complementary information of long-wave and short-wave radars is utilized to form a complete detection view. And intelligent collaboration of long and short wave data is realized through hierarchical fusion. Therefore, the system can simultaneously complete large-range transmission type detection and close-range millimeter-level high-precision measurement on one platform.

The sawtooth wave jig for mineral separation relates to the technical field of mineral separation equipment and comprises a machine body, the machine body comprises a mineral separation groove, a feeding hopper is fixedly installed at the top end of the mineral separation groove, a guide mechanism is installed at the bottom end of the feeding hopper, and a connecting hopper is fixedly installed at the bottom end of the mineral separation groove; a lubricating mechanism and a replacing mechanism are arranged at the bottom end of the connecting hopper, lubricating oil is added to the diaphragm more quickly while non-stop operation is achieved, the moving path of the fixing frame is limited through the telescopic rod, then the fixing frame is moved to drive the baffle to move into the containing groove from the annular liquid discharging opening, and the diaphragm is replaced. And then the lubricating oil falls on the surface of the connecting hopper from the annular liquid outlet, a part of the lubricating oil flows into the groove through the drainage groove, and due to non-shutdown operation, the lubricating oil can be uniformly coated on the surfaces of the connecting hopper and the groove through the movement of the diaphragm and the convex block, so that the use cost of the jigger is reduced.

A golf ball is disclosed herein that includes at least one radar detectable mark such that a projected pattern is formed when the at least one radar detectable mark is radially projected onto an outer surface of the golf ball. The projected pattern can have a first wave profile mapped along a path defined by a first spherical arc on the outer surface of the golf ball. The projected pattern can comprise at least one first crest and at least one first trough. The projected pattern can have a periodic function selected from: a sine wave, a sawtooth wave, a triangle wave, or a square wave.

Various examples of a closed-loop optical gyroscope are disclosed. The closed-loop optical gyroscope includes a broadband light source configured to generate broadband optical signal(s). The broadband optical signal(s) propagate in an optical resonator and are coupled in and out of the optical resonator by optical couplers. A phase modulator applies phase modulation to the optical signal(s) based on a sawtooth modulation signal. The optical signal(s) repropagate in the optical resonator in a different direction. The optical signal(s) are then received and analyzed to determine parameter(s) of the phase modulator. One or more processors configure the phase modulator based on the determined parameter(s).

The application discloses a modulation method for eliminating sideband harmonics at the integer multiple carrier frequency of common-mode voltage, which reselects effective voltage vectors in the process of synthesizing reference voltage vectors, so that the common-mode voltage waveform between carrier periods is completely the same, and according to the characteristics of the common-mode voltage waveform, the modulation method can completely eliminate sideband harmonics near the integer multiple carrier frequency of common-mode voltage while reducing the amplitude of common-mode voltage, effectively reducing the adverse effects caused by the amplitude of common-mode voltage and its sideband harmonics. In view of the increase of switching frequency caused by the modulation method, the switching times of each carrier period are reduced by means of sawtooth wave carrier, further reducing the harm of common-mode voltage to the system.

The utility model discloses a program-controlled frequency sweep signal source circuit, which comprises a sawtooth wave generator, a digital potentiometer, an MCU (Microprogrammed Control Unit) control circuit and a DAC (Digital-to-Analog Converter) circuit. The output end of the MCU control circuit is respectively connected with the input ends of the sawtooth wave generator, the digital potentiometer and the DAC circuit; the input end of the sawtooth wave generator is connected with the MCU control circuit, and the output end of the sawtooth wave generator is connected with the digital potentiometer; the input end of the digital potentiometer is respectively connected with the sawtooth wave generator and the MCU control circuit; the input end of the DAC circuit is connected with the output end of the MCU control circuit. The MCU control circuit can efficiently process parameters such as frequency sweep signal source bandwidth, frequency sweep frequency and central frequency point input from the outside and convert the parameters into internal control signals, and the highly integrated design simplifies the circuit structure and improves the reliability and stability of the system.

The present application relates to the field of integrated circuits, in particular to a constant root mean square voltage output circuit, the main purpose is to make the output power constant under different power supply voltage, and has the advantages of high efficiency, small area. The main scheme includes root mean square voltage generating circuit (1), first sawtooth wave generating circuit (2), first comparator (3), first inverter (4), second inverter (5), low pass filter circuit (6), second sawtooth wave generating circuit (7), second comparator circuit (8), power drive circuit (9), output stage circuit (10). The circuit of the present application is simple without complex peripheral circuit, which greatly reduces the circuit cost. The power loss is mainly derived from the conduction loss and switching loss of the first PMOS tube, which is very small compared with the output power, so the output efficiency is high.

The application discloses a carrier Doppler frequency shift and code Doppler frequency shift simulation method and device. First, original optical carriers output by a light source module are received, and non-spur frequency shift of the original optical carriers is realized. A carrier Doppler frequency shift amount and a code Doppler frequency shift amount output by a synchronous control module are received. A periodic sawtooth wave signal frequency and a slope are updated based on the carrier Doppler frequency shift amount, and a frequency-shifted optical carrier signal is obtained. A sampling clock frequency is adjusted based on the code Doppler frequency shift amount, and a code Doppler simulation baseband code element signal is obtained. Finally, the code Doppler simulation baseband code element signal is loaded on the frequency-shifted optical carrier signal, an adjusted optical signal loaded with the optical carrier and the code Doppler frequency shift at the same time is obtained, and is output to a laser communication terminal to be measured. The problem of poor sufficiency of Doppler frequency shift simulation is solved.

The present invention discloses a circuit structure and an electronic device. The circuit structure includes: a charging circuit, which is used to transmit the power supply current of a power supply circuit to a sawtooth wave generating circuit under a first pulse signal; a discharging circuit, which is used to adjust the voltage of the sawtooth wave generating circuit under a second pulse signal, and disconnect the power supply circuit from the sawtooth wave generating circuit during the second pulse signal; a comparison circuit, which is used to compare the voltage of the sawtooth wave generating circuit with a reference voltage and output a first level to an operational amplifier circuit; and an operational amplifier circuit, which is used to adjust the power supply current of the power supply circuit based on the first level.

The utility model relates to a goaf site fan foundation horizontal force loading model test device, which comprises a goaf foundation model frame, a fixing device, a loading device, a goaf foundation model and a wind turbine generator model, the front end of an electric cylinder is connected with a loading rod through a spring, and the loading rod is connected with the top of a tower drum in a bolt manner. An adjustable loading system is adopted in the aspect of a wind load loading system, stable output of waveforms such as sine waves, square waves and sawtooth waves can be achieved, and control software can track and correct peak and valley values of controlled variables (such as loads) in the test loading process. The typical value of the dynamic error of each peak value in the whole test process is + / -1% FS, and the adjusting capability is strong; wind loads can be applied to different positions of a goaf site under different engineering geological conditions according to test requirements, and the utilization rate of the test fixing device is improved.

This invention discloses a multi-target hybrid accumulation detection method based on a decoherent clean algorithm, comprising: acquiring the beat signal of a sawtooth frequency-modulated continuous wave signal; performing a one-dimensional Fourier transform on the beat signal to obtain the range dimension information of the target echo, and displaying the target echo's range dimension information as a moving target to obtain a preprocessed signal; searching different coherent segments based on the preprocessed signal, performing coherent accumulation within each segment using GRFT transform, and performing non-coherent accumulation between segments using GRT transform to obtain a hybrid accumulation result; acquiring the peak value in the hybrid accumulation result and comparing the peak value with a hybrid accumulation threshold; extracting the target motion parameters corresponding to the peak value and constructing a decoherent clean signal; removing the clean signal from the beat signal to obtain an updated beat signal, until the updated accumulation peak value is less than the hybrid accumulation threshold. This invention can improve the accumulation gain.

The invention discloses a methane telemetering imaging system and method based on an active infrared absorption spectrum and a fast reflector, and the system comprises a main control module, a laser driver, a laser, a detector, an off-axis parabolic reflector, a voice coil fast reflector, and a distance measurement module. The laser driver controls the laser device to emit modulated laser, the voice coil fast reflecting mirror controls the angle of emergent laser, the semiconductor photoelectric detector receives an echo optical signal, converts the echo optical signal into an electric signal and sends the electric signal to the main control module, and the main control module further completes signal analog-to-digital conversion through an analog-to-digital converter. And a digital lock-in amplifier is used to demodulate the signal to respectively obtain a first harmonic and a second harmonic. The method has the advantages of high imaging speed, high spatial resolution, high detection sensitivity and the like.