42results about How to "Improve anti-interference characteristics" patented technology

The invention relates to a method for improving photoelectric detector performance by cutting band gap wavelength in lattice matching system. The method comprises the following steps of: growing a buffer layer, a light absorption layer and a wide band gap cap layer which hare matched with lattices on a substrate by using an MBE (molecular beam epitaxy) method or metallorganics vapour phase epitaxy method to obtain an epitaxial structure of a photoelectric detector, wherein the band gap of the light absorption layer can be cut and set during the growth process, and the wide band gap is selected on the premise of meeting cut-off wavelength requirement of the long wave end of the photoelectric detector. According to the invention, the material growing method is simple; by cutting and setting the band gap of the light absorption layer of the photoelectric detector, the device performance can be obviously improved under the condition of basically not changing the original design of the device, and the detectivity can be enhanced by more than three times. The method is not only suitable for manufacturing photoelectric detectors in different kinds of III-V compound material systems, but also suitable for manufacturing other types of photoelectric devices and electronic devices; and the application of the method can be widened to other material systems. The method has a good application prospect.

The invention provides a real-time range measurement system based on quantum entangled light. The real-time range measurement system comprises a light source module and a circuit module, wherein the light source module is used for generating signal light and reference light; the circuit module is used for calculating a distance to be measured based on the input signal light and reference light. The light source module comprises a semiconductor laser, a filter, a one-quarter wave plate, a half-wave plate, a polarizing film, a periodically polarized crystal and a polarization beam splitter, wherein the semiconductor laser is used for generating pump light which is orderly incident into the one-quarter wave plate, the half-wave plate, the polarizing film and the periodically polarized crystal and then filtered out by the filter, and meanwhile, H polarized light and V polarized light are generated; the polarization beam splitter is used for separating out the signal light and the reference light from the H polarized light and the V polarized light. The invention also provides a corresponding method. The anti-jamming characteristic of the real-time range measurement system based on quantum entangled light is improved by use of a second-order association algorithm; besides, the real-time range measurement system is capable of realizing real-time data processing by use of FPGA (Field Programmable Gate Array), and therefore, data acquisition and data processing can be carried out simultaneously.

The invention relates to a 32-bit electronic control unit for a four-cylinder gasoline engine; the technical proposal comprises: the input end of a 32-bit single-chip microcomputer is connected with a signal processor, and the output end of the 32-bit single-chip microcomputer is connected with a driving module, an ignition control module, a throttle control module and a coprocessor; the 32-bit single-chip microcomputer is also connected with an external storage module which is used for storing a standard program; the standard program is used for processing detecting signals input by the signal processor; the output end of the 32-bit single-chip microcomputer outputs the processed signals; the output end of the driving module is connected with a fuel injection controlling module and a switch module; the output end of the 32-bit single-chip microcomputer is also connected with a communication module; a power module is connected with the 32-bit single-chip microcomputer and other modules needing power supply. The 32-bit electronic control unit has the advantages that 32-bit chips are adopted as main control chips so that the computation speed and stability of the 32-bit single-chip microcomputer are greatly improved compared with the 16-bit single-chip microcomputer.

The invention discloses an electricity consumption information acquisition system, which belongs to the technical field of data acquisition. The electricity consumption information acquisition system comprises a main station, an electricity meter and an optical fiber acquisition unit, wherein the optical fiber acquisition unit comprises a micro control unit, at least two RS485 circuits, an optical communication circuit, a storage chip and a power supply module. According to the electricity consumption information acquisition system, the optical fiber acquisition unit is uplinked to the main station by virtue of a high-speed optical fiber transmission method and can carry mass data transmission and enable a communication link to be more stable, the optical fiber acquisition unit is downlinked to the electricity meter to increase multiple circuits of RS485 buses, the multiple circuits of RS485 buses are independent of each other and are operated in parallel without interfering with one another, the modification of an uplink transmission channel and a downlink transmission channel enables the electricity consumption data acquisition capability to be greatly improved, and the high-frequency and high-precision requirement on acquiring the electric power data at present can be met.

The invention relates to an electric welding machine carrier wave remote control device with excellent anti-interference and anti-fading performance which comprises a main control panel and a welding cable of the electric welding machine and is characterized by being equipped with an electric welding machine carrier wave remote controller; the remote controller consists of a display unit, a key-press unit, a carrier wave send-receive drive unit which are connected with each other, a voltage regulation power unit and an CPU unit with a modem, and is used for setting up, sending and receiving and displaying the welding parameters; the two output connection lines of the carrier wave send-receive drive unit of the remote controller are connected with an electrode holder and a ground clamp of a welding cable of the electric welding machine; the carrier wave receiver arranged inside the electric welding machine consists of the connection of the carrier wave send-receive drive unit, the voltage regulation power unit, the CPU unit with modem and a D/A simulating signal output unit, which is used to receive the set welding parameters sent by the remote controller, and reflect the current welding parameters; the receiver is connected with the main control panel of the electric welding machine through communication interface or D/A simulating signal interface.

The invention discloses an application of a triphenylamine modified binaphthalene derivative. The compound capable of emitting fluorescence can be selectively combined with iron ions (Fe<3+>) at a single point to cause fluorescence quenching, so that the compound can be used as a fluorescent probe for detecting Fe<3+>, and the probe has the characteristics of high sensitivity and interference resistance and is easy to synthesize.

The invention discloses a rotary encoder, which includes a bearing pedestal, wherein the bearing pedestal is used for supporting a rotating shaft through a first bearing and a second bearing which are arranged at an interval; an end cover and a circuit board are fixed with the bearing pedestal; M pairs of photoelectric sensors are arranged at the circuit board at intervals in the circumferential direction; each pair of photoelectric sensors are arranged at an interval in the radial direction of the circuit board; the rotating shaft penetrates the circuit board, and a coding disk correspondingto the circuit board is fixed at the end of the rotating shaft penetrating through the circuit board; N light shielding blocks are uniformly distributed on the edge of the coding disk in the circumferential direction; when the coding disk is rotated, the light shielding blocks can pass by the radial interval of each pair of the photoelectric sensors; the included angle between the two adjacent pairs of photoelectric sensors meets the condition of the formula X equals to a*360/N +1, wherein the X is the included angle, a is a natural number, and N equals to the amount of the light shielding blocks; the bearing pedestal is provided with a sealing cover positioned on one side of the coding disk; the circuit board and the coding disk are positioned in the sealing cover; and a conducting wire via hole is formed in the sealing cover. The rotary encoder provided by the invention greatly improves the characteristics of antijamming and data reliability, and can meet the requirement for high-precision and high rotational speed measurement.

The invention discloses a mine dewatering water purification system and a construction method thereof. The mine dewatering water purification system comprises a storage functional area, a purificationfunctional area, a landscape functional area and a plant diversity functional area which are sequentially arranged from top to bottom on the original riverway of a slope, wherein gabion retaining walls are arranged among the areas, and the gabion retaining walls are step-shaped. According to the method, the original riverway is transformed; water storing and filtering functions are added; througha flow guiding and water catchment mode, dewatering water is collected and introduced into the transformed riverway, and large sundries such as branches and rocks of the dewatering water are filteredthrough the stilling gabions; plants are planted in a water storage area, so water quality is transformed, the dewatering water flowing to the lower stream becomes purified water, and a downstream river is prevented from being polluted; moreover, management and protection are convenient, attractiveness and elegance are achieved, and water resources are saved.

The invention discloses a canonical correlation separation main lobe interference suppression-based method. The method comprises the steps of obtaining a radar echo signal; carrying out first canonical correlation separation on the echo signal by taking a radar transmitting signal as a reference; performing pulse pressure processing on the result of the first canonical correlation separation to obtain a first pulse pressure result; performing second canonical correlation separation on the echo signal according to the first pulse pressure result; and performing pulse pressure processing on a result of the second canonical correlation separation to obtain a target position. According to the method, good correlation between the echo signal and the known emission signal is utilized, a good separation effect is achieved on the target signal and the interference signal in the echo signal through a two-time canonical correlation separation method, and therefore the anti-interference characteristic is improved, and the method is small in calculation amount, low in system complexity and low in implementation cost.

The invention provides a method for constructing a two-station two-line array three-dimensional imaging synthetic aperture radar system, which utilizes a mode combining a two-station synthetic aperture radar system and a line array system to ensure that both a transmitting antenna and a receiving antenna employ an array feed mode; during each pulse recurrence interval, only one transmitting line array feed is opened to transmit electromagnetic wave signals, and only one receiving line array feed is opened to receive echo data; both the transmitting line array feeds and the receiving line array feeds are controlled by a control switch, thereby realizing artificial control. A single motivation method is adopted to greatly reduce power consumption and hardware complexity, overcome distance blurring effect and facilitate three-dimensional imaging of viewing scenes. The method has the advantages of simple hardware structure, low power consumption, no array element coupling, small data processing capacity and the like.

The invention discloses a stable signal amplifying circuit structure; it solves the problem of low versatility of the impedance amplifier caused by the difficulty in adjusting the impedance of the impedance amplifier in the prior art; it includes a VCC, a current mirror, a first acquisition circuit, a second acquisition circuit, a control module, and an impedance amplifier. An adjustment module, the control module enables the current mirror to receive gradient equivalent impedance by selectively opening the impedance adjustment unit, and the current mirror outputs an amplified voltage; The output control signal voltage value of the module can adjust the impedance in the circuit to adjust the output of the current mirror, and realize the signal gradient amplification of the circuit.

Throttle control system logic signal conversion module, the input isolation unit is connected with the Schmidt comparison unit and the control voltage conversion unit; the Schmidt comparison unit a is connected with the output unit; the Schmidt comparison unit b is connected with the latch unit; The special comparison unit b is connected to the synchronization unit, and the synchronization unit is connected to the output unit; the Schmidt comparison unit c is connected to the latch unit, the control voltage conversion unit, and the voltage-controlled oscillator unit respectively; the latch unit is connected to the enable delay unit respectively. The timing unit is connected with the voltage-controlled oscillator unit; the enabling delay unit is connected with the output unit. The invention adopts relatively single device, has high reliability and maintainability, and can realize complete control function, has low power consumption and high anti-interference performance, solves the problem of precise control of gas turbine fuel valves, and provides a comprehensive solution for the entire gas turbine control The system provides a strong guarantee for fast and precise control; it can efficiently connect the PLC and the motor drive board to improve the corresponding speed and control accuracy of the motor.

The invention relates to a distributed multi-source information collaborative positioning system and method. The system comprises a transmitting module located on a first surface, a feedback module located on a second surface opposite to the first surface, and a server which is in communication connection with the transmitting module and the feedback module; the transmitting module comprises a first data processing unit, a first radar unit and a laser emitting unit; and the feedback module comprises a second data processing unit, a second radar unit and a laser detection unit. According to the distributed multi-source information collaborative positioning system and method, the accuracy of a measurement result of a position relation between the first surface and the second surface is high; and the collaborative positioning system and method is suitable for various scenes for measuring the position relation between the two opposite surfaces.

The invention relates to the technical field of intelligent kitchen regulation and control, in particular to an intelligent kitchen ventilation and air exchange device, which comprises a humidity acquisition circuit, a signal amplification circuit and a comparison control circuit which are electrically connected in sequence. The comparison control circuit comprises a first integrated operational amplifier U1. The output end of the first integrated operational amplifier is electrically connected with a humidifier; the forward input end of the first integrated operational amplifier is electrically connected with the signal amplification circuit; the reverse input end of the first integrated operational amplifier is electrically connected with the control end of a thirteenth resistor R13; thefirst end and the second end of the thirteenth resistor are electrically connected with a power supply; and a first power supply end 1 and a second power supply end 2 of the first integrated operational amplifier are electrically connected with the power supply respectively. According to the intelligent kitchen ventilation and air exchange device, by arranging the comparison control circuit, thehumidity is accurately controlled within a comfortable range suitable for work, the control precision is high, and automatic control over the humidity is achieved.