45results about How to "Easy to debug and test" patented technology

The invention relates to an expansion use method for a cell phone earphone interface, which is characterized by comprising the following steps of setting an earphone interface corresponding to four pins of the common terminal of an earphone connector, a microphone voice frequency, a right sound channel and a left sound channel at an cell phone end; and setting a control circuit of the common terminal, the microphone voice frequency, the right sound channel and the left sound channel, which is butted with the earphone interface on a cell phone mainboard. In addition, the operating method also comprises the following steps: S1, multiplexing a downloading port of a serial communication interface and the left sound channel of the earphone; and S2, multiplexing an uploading port of the serial communication interface, the microphone voice frequency of the earphone and a TV-OUT. The invention can cause the earphone, video output and a serial port line of the cell phone to share one interfacein the cell phone; and the invention has the advantages of brief design, cost saving, and stronger generality.

The invention relates to a method for expanding the USB (Universal Serial Bus) interface of a mobile terminal into an earphone interface, which comprises the following steps: at the USB interface of the mobile terminal, multiplexing the R and D+ of earphones, multiplexing the L and D- of the earphones, and multiplexing the M and ID of the earphones f; and arranging an analog switch on the mainboard of a mobile phone, wherein the analog switch is used for switching the earphone interface and the USB interface. According to the method, the USB interface is multiplexed into the earphone interface through the analog switch, the baseband platform of the mobile phone is not needed to provide interrupt or ADC (Analog Digital Converter) detection, therefore the method is suitable for different mobile terminal platforms, the design cost is reduced, and great convenience is provided for the debugging test of a design company and the normal use of a user.

The invention relates to a closed-loop control process for a self-adaption optical deformable mirror based on GPU computation, comprising following steps: deformable mirror shaping the optical wave; Hartmann detector receiving the shaped optical wave and obtaining the Hartmann image; Hartmann image inputting into the video memory of the video card through the calculator memory; GPU dividing the Hartmann image in the video memory and computing the grey scale centre of gravity in each division; computing the wave tilt vector according to the Hartmann image and grey scale centre of gravity thereon in respective division; computing the zernike multinomial coefficient according to the wave tilt vector; computing the dominant vector of the deformable mirror actuator according to the zernike multinomial coefficient; controlling the deformable mirror by the dominant vector of the deformable mirror actuator. The invention performs the whole computation in the GPU based on the prior system, achieves the control frequency which is difficult to control by the CPU, is convenient for test, debug, upgrade, maintenance and secondary development.

The invention relates to a circuit structure for controlling infrared remote control emission. The circuit structure comprises a carrier wave generation module for controlling high and low level length of the carrier wave according to a preset value, a waveform combination module which is connected with the carrier wave generation module and used for combining the carrier wave and a function code and selecting to only emit the carrier wave or only emit the function code according to a user operation, a driving module which is connected with the waveform combination module and used for selecting a driving mode and driving capacity. The circuit structure for controlling infrared remote control emission by employing the structure saves system overhead, is convenient for testing and debugging in large-scale production. An original circuit board continues to use an externally installed driving mode, and a novel circuit board employs an internally installed driving mode. The driving capacity can be selected in the internally installed driving mode, so that the internally installed driving mode is more flexible. At the same time, the driving capacity can be selected according to actual requirements, and different driving capacities can be selected according to emission distance so as to reduce power consumption, thereby prolonging a service life of the battery and obviously reducing cost of a whole machine. Work performance is stable and reliable, and an application range is relatively wide.

The invention discloses a detection and debugging device for a serial absolute encoder of a servo drive system. A microcontroller of the device is in communication connection with an upper computer and a field programmable gate array; the input end of a display screen is connected with the display signal output ends of the microcontroller and the field programmable gate array; the field programmable gate array is in communication connection with the serial absolute encoder through an encoder connecting port; the microcontroller sends a communication protocol to the field programmable gate array through an encoder protocol selection switch; and an encoder single-circle zero-clearing setting button and an encoder multi-circle zero-clearing setting button carry out single-circle zero-clearingand multi-circle zero-clearing on the serial absolute encoder through the encoder connecting port. The device can rapidly detect, assemble and set multiple serial absolute encoders, is convenient forfield detection and debugging of the serial absolute encoder, has the characteristics of being low in cost and high in reliability, and improves the efficiency of detection and debugging operation.

The invention relates to a miniaturization device for converting an end feeding type coaxial line to circular waveguide. The miniaturization device comprises the circular waveguide. One end of the circular waveguide is closed to serve as a short-circuit end. An opening is formed in the other end of the circular waveguide. A coaxial joint is arranged in the middle of the short-circuit end of the circular waveguide. The axial direction of the coaxial joint is consistent with the transmission direction of an electromagnetic field in the circular waveguide. An inner conductor of the coaxial joint is inserted into the circular waveguide. The end portion of the inner conductor is connected with an over-three-level metal step impedance conversion block. The bottom face of the step impedance conversion block is connected with the inner wall of the circular waveguide. According to the miniaturization device for converting the end feeding type coaxial line to the circular waveguide, miniaturization design is achieved, and the requirements of different working band widths can be met by changing the level number of the step impedance conversion block. The miniaturization device for converting the end feeding type coaxial line to the circular waveguide is good in machining manufacturability and convenient to experimentally debug. For example, in an X frequency band, the length of the miniaturization device for converting the end feeding type coaxial line to the circular waveguide can be reduced to 60mm from 110mm in an existing structural style, and in a Ku frequency band, the length of the miniaturization device can be reduced to 40mm from 70mm.

The invention discloses an adapter for converting LVDS (Low Voltage Differential Signaling) into USB3.0 (Universal Serial Bus 3.0). The device comprises an FPGA (Field Programmable Gate Array) chip XC3S400, a USB (Universal Serial Bus) interface chip CYUSB3014, an LVDS (Low Voltage Differential Signaling) receiver DS90LV031 and an RS-422 driver DS26LV31, and further comprises an LVDS data transmission interface, an RS422 digital tube interface and a USB3.0 interface, the LVDS-to-USB 3.0 adapter is used for directly receiving LVDS serial image data sent by a spectrograph when a satellite-borneor airborne spectrograph is connected with a ground detection platform, and converting the LVDS serial image data into USB interface data which can be recognized by the ground detection platform. Moreover, the ground detection platform can send RS-422 data tube control instructions, such as image start and stop, exposure time, gain and other control commands, time code information, satellite or airplane simulation attitude and other information to the spectrograph through the adapter by using the same USB interface at the same time. The problem that a spectrograph with a standard aviation interface cannot be directly connected with a notebook computer of a ground detection platform on the ground in the development process is solved.

The invention relates to a wireless monitoring module for a producing workshop based on Bluetooth wireless communication, specifically, the wireless monitoring module for the producing workshop for performing site real-time monitoring. The wireless monitoring module comprises a monitoring terminal having a Bluetooth function, a Bluetooth wireless module, an operation processing unit and a CAN (Controller Area Network) bus interface module, wherein the monitoring terminal having the Bluetooth function is connected and communicated with the Bluetooth wireless module through a Bluetooth 2.0 EDR (Enhanced Data Rate) mode wireless communication protocol; the Bluetooth wireless module is connected with an operation control unit in a serial communication connection mode; and the operation control unit is connected with a CAN bus of the producing workshop through a CAN bus interface and carries out information exchange and control with the remaining control nodes. The wireless monitoring module can be used for reducing the cost of the monitoring module.

The invention relates to an adapter card for PCI (peripheral component interconnect ) Express X8 to CPCI (compact peripheral component interconnect ) Express X8. The adapter card comprises an impedance control circuit board, an adapting circuit board, a PCI Express X8 interface, a CPCI Express X8 signal socket, a CPCI Express X8 power supply socket, a double row socket, a curved needle double row plug, a connecting block and a baffle, wherein the upper edge of the impedance control circuit board is crimped with the CPCI Express X8 signal socket and the adapting circuit board; the lower edge is provided with the PCI Express X8 interface; the curved needle double row plug is arranged in an inclined left middle part of the impedance control circuit board; the CPCI Express X8 power supply socket and the curved needle double row plug are installed on the adapting circuit board; the connecting block is used for vertically fixing the impedance control circuit board and the adapting circuit board trough screws; and the baffle is connected with the impedance control circuit board and a computer case through screws. With the adoption of the adapting card for PCI Express X8 to CPCI Express X8 provided by the invention, the quality and function of signals in the PCI Express X8 and CPCI Express X8 are not affected, application of current PCI Express X8 slots is expanded, and the development difficulty and cost of a CPCI Express X8 interface card is greatly reduced; and the adapting card is simple in structure and convenient in use.

The invention relates to the technical field of vehicle audios and videos, and provides a vehicle-mounted audio equipment speech control system. The system comprises a hardware system and a software module, wherein the hardware system is composed of a directional pickup, a speech recognition module, a control module and an audio module; the pickup collects a speech command emitted by a driver; thespeech recognition module is used for converting a physical speech signal output by the pickup into a digital speech signal, and recognizing Chinese characters or words corresponding to the speech command; and the control module generates a corresponding entry encoding command, and transmits the control command to audio equipment via a system I / O port line. According to the vehicle-mounted audioequipment speech control system, an SDA80D51 chip is used, so that speech recognition and control of speaker-independent of the vehicle-mounted audio equipment are achieved. The chip is high in integration level, so that fewer peripheral modules are needed, the designed hardware circuit is simple, and the system is convenient to debug and detect.

The invention discloses the method of controlling the characteristic of arc with digitalization under different conditions and the circuitry design with the method. The method comprises the following steps: adopting embedded monolithic system, controlling the characteristic of arc by changing logical decision, logic calculus and current compensation algorism, accomplishing the characteristic of arc digital control under the mode of hand welding and argon-arc welding, comprising hot striking current control, thrust current control and secondary circuit current cut-out and current recovery. The development cycle is reduced, and it is effective to improve the versatility of control system. Besides, the digital code display, which can display welding current and welding voltage at the same time, is convenient to use and upgrade.

The invention discloses a double-power-supply automatic change-over switch with warning devices. The double-power-supply automatic change-over switch comprises a bottom board, a main circuit breaker, a back-up circuit breaker and an operating mechanism, wherein the main circuit breaker and the back-up circuit breaker are arranged on the bottom board, and the operating mechanism is used for change-over between the main circuit breaker and the back-up circuit breaker. A surface cover is arranged at the upper end of the bottom board, warning device mounting windows are formed in the left and right sides of the surface cover respectively, mounting grooves are formed in the warning device mounting windows, an auxiliary contact and a warning contact are arranged in each mounting groove, each auxiliary contact comprises an upper auxiliary contact binding post and an auxiliary contact plugging portion below the auxiliary contact binding post, and each warning contact comprises an upper warning contact binding post and a warning contact plugging portion below the warning contact binding post. The double-power-supply automatic change-over switch with the warning devices has the main advantages of simple structure, convenience in use, mounting, demounting, detection and debugging, reasonableness, compactness, excellent performance and high security coefficient.

The invention discloses handcart equipment for direct-current metal switch equipment. The handcart equipment is mainly composed of a propelling mechanism, a main loop contact arm, a coupling loop contact arm, a capacitor chamber, a permanent magnet switch, a secondary component compartment, a secondary aviation plug, a roller and the like. In order to ensure the overall size of the switch equipment, main components need to be considered on the basis of meeting the functions of current transfer, follow current thyristor residual voltage discharge, phase-to-phase and fracture safety distance, magnetic quenching and the like, and the boundary dimensions and arrangement modes of capacitors, permanent magnet switches, poles and secondary components need to be confirmed; and a locking mode of the handcart, the cabinet body valve and the ground knife is designed. And after the appearance is determined, the handcart is designed to be interlocked with the cabinet body mechanism, and the wiringmode of the secondary wire is customized, so that the design of the DC + / -10kV metal switch handcart is completed.

The invention discloses a satellite-borne data combiner multiplexer test device and method. The device comprises an analog data generation module, a multiplexer data acquisition module and an analysisand comparison module arranged on an upper computer. Wherein the analog data generation module and the multiplexer data acquisition module are realized through an FPGA, and the analog data generationmodule is used for simulating a load to generate multiple frames of image data, performing format conversion on each frame of image data, converting single-ended data into differential data, and sending the differential data to the satellite-borne data combiner multiplexer for multiplexing processing; the multiplexer data acquisition module is used for acquiring SerDes type image data after multiplexing processing output by the satellite-borne data combiner multiplexer, caching the SerDes type image data after serial data parallelization processing, and sending the cached data to the analysisand comparison module of the upper computer in a PCIe bus mode; and the analysis and comparison module is used for carrying out check bit judgment on the received data and verifying the correctness of the data acquired by the satellite-borne data combiner multiplexer.

The invention discloses an offline test system for a potential energy recovery device, wherein the system is mainly composed of a mechanical system and an electrical system. A program is included inside and can automatically complete each of tests. The mechanical system is mainly composed of three parts including a platform support, a gravity simulation mechanism and a lifting mechanism. The electrical system is mainly composed of an industrial control computer, a variable frequency power supply, a variable frequency motor controller, a torque motor controller, a servo controller, an analog acquisition module, an encoder acquisition module, a digital output module, a digital acquisition module, a load acquisition module, a voltage sensor, and a current sensor. The system can perform an offline test on the potential energy recovery device through a scientific test debugging method, equipment can automatically complete a test according to setting of debugging personnel, testing of various indicators can be completed before actual installation of the potential energy recovery device, so as to confirm that the performance of the potential energy recovery device meets requirements, andthe risk of on-site installation and debugging is reduced.

The present invention relates to an FRU debugging and testing device which is based on an ATCA frame, including a main digital processor, a sub-digital processor and a topper computer. The sub-digital processor is used for collecting the data on the IPMB1 and sending the data to the main digital processor which is used for the receiving of the spot debugging command and the data on the IPMB1 which are sent by the sub-digital processor. The hardware address is collected by the I / O port of the main digital processor and the data on the IPMB0 is collected by the USI of the main digital processor. The data on the IPMB0 and the IPMB1 sent by the sub-digital processor are sent to a topper PC machine. The topper computer is used for sending the debugging command to the main digital processor andreceiving and analyzing the data on the IPMB0 and the IPMB1. The present invention makes the spot FRU debugging or the IPMC debugging intuitive and convenient and can achieve the receiving and analyzing of the IPMB data on the human-computer interface of the topper computer and to explain the content of the whole data packet according to the content of the user.

The invention provides a hybrid compensation method for comprehensive control of power quality management. The method comprises: monitoring changes of voltage and current in a power system in real time, and then collecting a voltage waveform and a current waveform at the current moment; calculating a current component through discrete Fourier transform; and calculating electric power parameters such as reactive power, active power, apparent power, a power factor, harmonic voltage and the distortion rate of each order, harmonic current and the wave distortion rate of each order in combination with the voltage then. The main control module is communicated with the compensation equipment, the main control module operates according to the electric power parameters, preferentially operates theharmonic filtering mode and then operates the reactive compensation mode, and meanwhile, the harmonic filtering mode operates all the time, so that the performance is good.

The invention relates to a miniaturized broadband orthogonal type waveguide coaxial converter. The waveguide coaxial converter comprises a standard rectangular waveguide, wherein one end of the standard rectangular waveguide is a short-circuit end and the other end of the standard rectangular waveguide is opened; a wide edge at one side of the standard rectangular waveguide is provided with a coaxial connector; an axial direction of the coaxial connector is orthogonal with a transmission direction of an electromagnetic field in the rectangular waveguide; an inner conductor of the coaxial connector stretches into the standard rectangular waveguide; a metal small circular table is connected with the end part of the coaxial connector; the metal small circular table and the inner conductor and the coaxial connector are concentric; and five quincuncially-distributed metal matching columns are arranged at the wide edge of the other side of the standard rectangular waveguide. The waveguide coaxial converter disclosed by the invention satisfies good performances of miniaturization, broadband and small standing waves; the machining manufacturability of the structure is good, and the experiment installation and debugging are convenient. For example, the length of the converter of an X frequency range full-waveguide bandwidth can be reduced to 15 mm from 50 mm in a regular step manner; and in a Ka frequency range, the length of the converter can be reduced to 6 mm from 20 mm.

The invention provides a hydraulic power generation system. A ship body, an impeller system B, a hydraulic transduction system C and a power generation system D are included, and the impeller system Bis arranged below the ship body; the impeller device B can rotate under the moving action of the ship body, the hydraulic transduction system C and the power generation system D are arranged on the ship body, the hydraulic transduction system C can conduct kinetic energy-mechanical energy-hydraulic energy conversion under the rotating action of the impeller device B, and a power generator rotatesat a constant speed under the action of a control system. According to the design, an impeller is mounted at the bottom of a ship; the impeller and a quantitative hydraulic pump are directly connected and rotate synchronously, all control components and execution components are placed on a cabin through the system, on one hand, water flow is generated during ship body running, the impeller rotates through water flow impact force, then the power generator rotates at a constant speed under the action of the control system, and therefore constant-frequency stable power generation is achieved. Onthe other hand, installation and maintenance are convenient, system debugging tests are simple, and cost is reduced.

The invention provides a digital array radar optical fiber transmission network which is used to establish data communication between a digital T / R assembly and a signal processing assembly. The network comprises a single mode fiber connected to the signal processing assembly and an optical branching device connected to the established digital T / R assembly. The single mode fiber is used for sending a signal from the signal processing assembly to the branching device. The optical branching device divides the signal into several paths and then transmits to the digital T / R assembly. The single mode fiber and the optical branching device are connected in a jumper wire mode through one first optical fiber. The optical branching device and the digital T / R assembly are connected in the jumper wire mode through several second optical fibers. The transmission network adopts the single mode fiber and the optical branching device. Through an system improvement, ''one-to-many'' network interconnection is realized so that design cost and maintenance cost are greatly reduced, a signal phase jitter problem brought by multi-optical-fiber transmission is avoided and communication stability is increased.

The invention discloses a circuit and a method for modifying a chip system memory for burning. The method comprises the following steps: (1) writing an FPGA (Field Programmable Gate Array) project file; (2) burning the project file into an FPGA (Field Programmable Gate Array); (3) completing circuit connection; (4) starting to burn the program, and outputting a control instruction to the flash by the engineering file by means of bist pad so as to modify the data of the system memory; and (5) detecting whether the program is burnt successfully or not. According to the method, the bist test pad of the flash in the chip is utilized to enter the bist mode, the chip to be tested is connected through the fpga board, the corresponding erasing instruction and content are sent to the bist serial interface, the content of a system memory can be modified after the chip leaves a factory, a BootLoader program can be conveniently tested, and the chip can conveniently debug and test the flash.

The invention discloses an off-line testing method of a potential energy recovery device. A testing system mainly comprises two parts, namely a mechanical system and an electrical system. A program isincluded therein, and various detections can be automatically completed. The mechanical system mainly comprises three parts, namely a platform support, a gravity simulating mechanism and a hoisting mechanism. The electrical system mainly comprises an industrial computer, a variable-frequency power supply, a variable-frequency motor controller, a torque motor controller, a servo controller, an analog acquisition module, an encoder acquisition module, a digital output module, a digital acquisition module, a load acquisition module, a voltage sensor and a current sensor. By a scientific testingand commissioning method, the potential energy recovery device is tested offline, equipment can automatically complete testing according to setting of commissioning personnel, and various indexes canbe tested before the potential energy recovery device is actually mounted so as to guarantee that the performance of the potential energy recovery device meets requirements and reduce on-site mountingand commissioning risks.

The present invention relates to a method, device and SOC system for discriminating runaway CPU programs. The SOC system includes a CPU runaway monitoring device deployed on the system bus and configured by CPU coordination management. The CPU runaway monitoring device is configured with hardware Trap address space and trap code, the discriminating method of this CPU program running away comprises: configure the hardware trap address space and trap code of CPU running away monitoring device, and preset trap hit function; Monitor CPU in real time by described CPU running away monitoring device The addressing address on the system bus; quickly identify the runaway of the CPU program, and realize different operations according to the hit function set in the CPU runaway monitoring device. When the CPU runs away, respond in real time according to the preset operation behavior to correct the error; it is convenient for debugging and testing during SOC development, and quickly locates difficult problems; it is convenient for real-time detection of system error running status in SOC chip application scenarios, minimizing Unnecessary loss caused by system failure.

The invention discloses a DC motor. The DC motor is applied to a nuclear-level valve electric executing mechanism, comprising a motor seat, a shaft extending end cover and a reverser end cover, wherein the shaft extending end cover is of a single-layer end cover structure and arranged at one end of the motor seat; the reverser end cover is of a double-layer end cover structure and arranged at the other end of the motor seat. According to the DC motor, the reverse end cover is of the double-layer end cover structure through which the structure and sealing requirements of the DC motor are ensured, and meanwhile, the testing, debugging, use and maintaining processes of the DC motor are conveniently performed; the special requirements of a nuclear power environment can be further met, and the protecting grade is high.

The invention relates to a circuit structure for controlling infrared remote control emission. The circuit structure comprises a carrier wave generation module for controlling high and low level length of the carrier wave according to a preset value, a waveform combination module which is connected with the carrier wave generation module and used for combining the carrier wave and a function code and selecting to only emit the carrier wave or only emit the function code according to a user operation, a driving module which is connected with the waveform combination module and used for selecting a driving mode and driving capacity. The circuit structure for controlling infrared remote control emission by employing the structure saves system overhead, is convenient for testing and debugging in large-scale production. An original circuit board continues to use an externally installed driving mode, and a novel circuit board employs an internally installed driving mode. The driving capacity can be selected in the internally installed driving mode, so that the internally installed driving mode is more flexible. At the same time, the driving capacity can be selected according to actual requirements, and different driving capacities can be selected according to emission distance so as to reduce power consumption, thereby prolonging a service life of the battery and obviously reducing cost of a whole machine. Work performance is stable and reliable, and an application range is relatively wide.

A scaled model-based UHV converter transformer impulse withstand voltage test method, according to the specific structure of the scaled model designed based on the scaled-down theory, conducts simulation research to obtain the distribution parameters of the scaled-down model windings, and determine the test waveform; according to the research needs , set the lead-out tap on the scaled model to obtain the required test waveform, and set related faults; make the actual equipment, use the scaled model to test, and adjust the parameters of the produced power equipment to obtain the required test waveform; Simplify the structure of the equipment and The test method is to obtain the winding voltage distribution waveform, and set the tap to set the corresponding fault for experimental research; through the analysis and research, the normal condition of the winding under the impulse voltage and the voltage distribution characteristics of the fault condition are obtained, and the UHV commutation is obtained by using the scaling relationship Transformer voltage distribution characteristics. The invention can simplify the test steps, reduce the test cost, shorten the test period, and can study the winding voltage distribution characteristics under different fault conditions.

The invention provides a cross-platform simulation system for testing input and output functions of software, for testing the input and output functions of an application to be tested. The cross-platform simulation system comprises an input function testing unit and an output function testing unit, wherein the input function testing unit is used for generating a switching value input test instruction and transmitting the switching value input test instruction to a to-be-tested application program; the output function testing unit is used for receiving a switching value output test instructionsent by an application program to be tested and carrying out corresponding effect display according to the switching value output test instruction; and the application to be tested generates a switching value output test instruction, receives the switching value input test instruction, and performs a corresponding logic test according to the received switching value input test instruction. The cross-platform simulation system has the advantages of being simple, convenient, time-saving, labor-saving and high in working efficiency.

The invention relates to a dual-wavelength laser based on stimulated Raman scattering of aqueous ethanol solution. The dual-wavelength laser comprises a pump source, a diaphragm, a first window, a Raman box, a second window and a first color filter which are sequentially placed along an optical path. The first window, the Raman box and the second window are sequentially sealed and connected, and the Raman box is filled with an ethanol aqueous solution. The pump source generates laser light, the laser light passes through the diaphragm, the first window, and is incident into the Raman box containing the ethanol aqueous solution. At the same time, ethanol and water respectively generate stimulated Raman laser to form a dual-wavelength stimulated Raman laser with frequency difference. The first color filter filters out the pump light and transmits the required dual-wavelength laser. The pump source and the working medium of the invention have a wide selection range and flexible wavelengthselection. The threshold for resistance to light damage is high. The laser diameter and medium length are flexible. The cost is low, the dual-wavelength laser is easy to produce, is simple to debug,is wide in application range, can be used for fine laser spectroscopy, differential absorption laser radars, laser communication, environmental detection, fiber optic communication, nonlinear opticalfrequency conversion, etc.

The invention relates to a dual-wavelength laser based on stimulated Raman scattering of aqueous ethanol solution. The dual-wavelength laser comprises a pump source, a diaphragm, a first window, a Raman box, a second window and a first color filter which are sequentially placed along an optical path. The first window, the Raman box and the second window are sequentially sealed and connected, and the Raman box is filled with an ethanol aqueous solution. The pump source generates laser light, the laser light passes through the diaphragm, the first window, and is incident into the Raman box containing the ethanol aqueous solution. At the same time, ethanol and water respectively generate stimulated Raman laser to form a dual-wavelength stimulated Raman laser with frequency difference. The first color filter filters out the pump light and transmits the required dual-wavelength laser. The pump source and the working medium of the invention have a wide selection range and flexible wavelengthselection. The threshold for resistance to light damage is high. The laser diameter and medium length are flexible. The cost is low, the dual-wavelength laser is easy to produce, is simple to debug,is wide in application range, can be used for fine laser spectroscopy, differential absorption laser radars, laser communication, environmental detection, fiber optic communication, nonlinear opticalfrequency conversion, etc.