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126results about How to "Adjustable output" patented technology

Double-wavelength multi-channel laser acupuncture and moxibustion instrument

The invention discloses a double wavelength multi-channel laser acupuncture and moxibustion instrument. The double wavelength multi-channel laser acupuncture and moxibustion instrument comprises a control system, a driving power source, a semiconductor laser module, an optical fiber coupler, optical fiber channels, an optical fiber fixing head and upper computer software. The semiconductor laser module comprises a plurality of sets of laser devices with the wavelength being 808 nm and 635 nm respectively. One laser device with the wavelength being 635 nm and one laser device with the wavelength being 808 nm form a set. Two kinds of lasers different in wavelength are coupled into one butt-joint optical fiber, output of one channel is obtained, and the optical fiber channels are used for adjusting and fixing optical fiber through adjustable metal arms so that the effective work distance and the work angle of the optical fiber can be freely controlled and adjusted. A total control chip is adopted for the control system to control the driving power source. The upper computer software is in data transmission with a control module though an RS232 serial port, and current, power and temperature are controlled and displayed. The optical fiber is fixed to an irradiated object through the optical fiber fixing head. By means of the double wavelength multi-channel laser acupuncture and moxibustion instrument, laser acupuncture and moxibustion with different parameters can be performed on various portions at the same time.
Owner:INST OF BIOMEDICAL ENG CHINESE ACAD OF MEDICAL SCI

Low-voltage bandgap-free reference voltage source

The invention relates to the integrated circuit technique and discloses a low-voltage bandgap-free reference voltage source. According to the technical scheme, the low-voltage bandgap-free reference voltage source comprises a starting circuit composed of a CMOS transistor circuit, a first current generating circuit, a second current generating circuit, a third current generating circuit and an overlaying output circuit, wherein the starting circuit is used for providing a starting bias voltage for the whole circuit, the first current generating circuit is used for generating a current IPTAT in direct proportion to the temperature, the second current generating circuit is used for generating a current IPTOD in direct proportion to an overdriving voltage, the third current generating circuit is used for generating a current IPTTV in direct proportion to a threshold voltage, the current IPTTV is inversely proportional to the temperature, and the overlaying output circuit is used for overlaying of the current IPTAT and the current IPTTV and outputting a reference voltage VREF. The low-voltage bandgap-free reference voltage source has the advantages that the working voltage is low, the output voltage can be adjusted, influence of a technique on the low-voltage bandgap-free reference voltage source is little, and the area of a chip is small.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA

Portable wide-limit high-stability constant current source

The invention relates to a portable high-stability constant-current source with a wide range, and its structure includes an ARM single-chip microcomputer system, a touch screen module, a boost module, a negative feedback amplification module, a DA control module, a constant-current source adjustment module, a current compensation module, Temperature measurement and holding module, sampling resistance module, detection module, constant current source power supply module and power module and other parts. The invention can output a high-precision voltage reference with any voltage value between 0-10V, and the relative standard deviation of the output voltage reaches 2.34*10 in a short time ‑7 , the voltage stability is 3.4*10 ‑8 . The constant current source of the present invention solves the problem that the stepping transformer in the traditional constant current source adjusting tube voltage drop control circuit needs to be specially made and the current mutation before and after switching due to uneven voltage stepping, the motor control circuit and the mechanical deceleration device of the voltage regulator are complicated and huge. After the introduction of the switching power supply, the interference caused by the current stability and ripple is large and other defects and deficiencies.
Owner:HEBEI UNIVERSITY

Offshore wind turbine comprising impressed current cathode anticorrosion protection and monitoring device

The invention discloses an offshore wind turbine comprising an impressed current cathode anticorrosion protection and monitoring device. The device comprises a steel structure foundation, wherein a column foot platform is arranged on the steel structure foundation; a tower is fixed on the column foot platform; a wind power main machine is arranged at the upper end of the tower; the steel structure foundation is connected with the impressed current anticorrosion protection and monitoring device; the impressed current anticorrosion protection and monitoring device comprises a monitor arranged on the column foot platform, a controllable direct current power supply, a potential measuring instrument, an auxiliary anode and a reference electrode, wherein the auxiliary anode and the reference electrode are fixed on the steel structure foundation; an anode shielding layer with a physical barrier function covers the surface of the auxiliary anode; the negative electrode of the controllable direct current power supply is connected with the steel structure foundation; the positive electrode is connected with the auxiliary anode; and the auxiliary anode is electrically connected with the steel structure foundation through a seawater medium after the circuit is communicated so as to form a closed loop. The invention aims to provide the offshore wind turbine which is provided with the impressed current cathode anticorrosion protection and monitoring device, has an electrochemical anticorrosion protection function and is convenient for implementation and maintenance.
Owner:GUANGDONG MINGYANG WIND POWER IND GRP CO LTD

Adjustable quantitative injection pump

The invention relates to an adjustable quantitative injection pump. A speed reduction motor is arranged on a pump body. A rotating block is fixed on an output shaft of the speed reduction motor. An adjusting screw rod vertical to the output shaft of the speed reduction motor is arranged on the rotating block. A sliding block drive pin is arranged on the adjusting screw rod. The axis of the sliding block drive pin is deviated from the axis of the output shaft of the speed reduction motor. The sliding block drive pin is matched in a transverse groove of a sliding block in a sliding mode. The sliding block is matched on a vertical sliding block guide rod in a sliding mode. A vertical drive rod is fixed on the sliding block. The drive rod is connected with a push rod of a syringe through a linkage block. According to the invention, a transmission mechanism of the syringe is formed by the speed reduction motor, the rotating block, the sliding block drive pin, the sliding block and the drive rod and drives the push rod of the syringe to take the piston motion, wherein the sliding block drive pin is arranged on the adjusting screw rod and the eccentricity of the sliding block drive pin relative to the output shaft of the speed reduction motor can be regulated, so that the output of the syringe is regulated. The adjustable quantitative injection pump has simple structure and low cost, is stably and reliable to operate and is simple and convenient to control.
Owner:JIANGNAN UNIV

Intelligent bait casting machine and intelligent control system of bait casting machine

The invention relates to an intelligent bait casting machine. The intelligent bait casting machine comprises a shell body, a bait chamber formed in the shell body, a bait guiding mechanism comprising a bait guiding motor and a bait guiding screw, a bait casting mechanism comprising a bait casting motor and a bait casting plate, a control system comprising terminal power supplies, controllers, Lora nodes, at least one Lora gateway, a cloud end and a client end, wherein a feeding door is formed in a top panel, and a first discharging port is formed in the bottom of the shell body; the bait casting plate is horizontally arranged at the bottom of the shell body and located below the first discharging port, several bait throwing baffles are uniformly arranged on the bait casting plate, and the bait casting motor is fixed to the upper surface of a bottom plate of the shell body and is in driving connection with the bait casting plate; according to the intelligent bait casting machine, by improving the structure of the bait casting machine and adopting the technology of the Internet of Things, through combination of private cloud services and a low-power-consumption Lora local area network, the bait casting operation of the bait casting machine can be remotely controlled, and the workload of breeding workers is effectively reduced.
Owner:SANSHA LANHAI MARINE ENG +1

Unit cascaded type frequency converter based on DSP (digital signal processor) and FPGA (field programmable gate array)

The invention discloses a unit cascaded type frequency converter based on a DSP (digital signal processor) and an FPGA (field programmable gate array). The unit cascaded type frequency converter based on the DSP and the FPGA comprises a main circuit, the DSP and the FPGA, wherein the DSP is used to receive input frequency from a keyboard and calculate a modulation degree, and furthermore sends modulated wave frequency and a voltage modulation degree to the FPGA through a special SPI (serial peripheral interface), the FPGA is used to generate an SPWM (sinusoidal pulse width modulation) signal according to the modulated wave frequency and the voltage modulation degree, which are input, so as to control connection and disconnection of a power pipe in the main circuit, the main circuit comprises a phase shifting transformer and n power modules which are cascaded, and n is an integer, and larger than or equal to 3. The unit cascaded type frequency converter based on the DSP and the FPGA can flexibly adjust carrier frequency, the modulating wave frequency and the modulation degree, is rapid in respond, and can effectively guarantee speed regulation performance of the unit cascaded type frequency converter based on the DSP and the FPGA.
Owner:CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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