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

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 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 aThe 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 aneeding 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 mneeding 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.icrocomputer are greatly improved compared with the 16-bit single-chip microcomputer.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 si 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 signangle-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 switl 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 modulesch 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

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 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 an anti-jamming circuit for a myoelectricity evoked potential instrument diagram, comprising a transient voltage protection circuit, a high frequency interference filtration circuit, a dual-circuit symmetrical preamplifier, a high pass filtration circuit, a differential mode amplification circuit of a program control meter, a program control high pass filtration circuit, a program control amplification circuit, a program control low pass filtration circuit, an anti-aliasing filtration circuit, a selective power frequency trapped wave circuit, an AD conversion circuit and a single chip microcomputer; and the single chip microcomputer also controls and connects a visual stimulator, a sound stimulator, a spark stimulator and a current stimulator, wherein the visual stimulator is digitally isolated from the single chip microcomputer, and the current stimulator and the single chip microcomputer are in photoelectric isolation. The invention has the beneficial effects that the circuit adopts a humanistic design idea, and uses a computer system to control the visual stimulator, the sound stimulator, the spark stimulator and the current stimulator to detect a detection position of an object; a multistage amplification circuit and a multistage filtration circuit are internally arranged in the anti-jamming circuit; and the anti-jamming circuit applies an isolation technology, thereby effectively inhibiting common-mode interference, improving the anti-jamming capability and the measurement precision of the myoelectricity evoked potential diagram instrument.

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 an anti-interference constant current LED driving circuit, which includes: a rectification filter circuit, a power supply circuit, a control module, a current regulation circuit, and a switch circuit. The control module includes: a constant current control unit, a state detection unit, a logic circuit, A driving unit, a first comparator, and a second comparator. In the constant current LED drive circuit provided by the present invention, when the state detection unit detects that the discharge time is less than the first minimum discharge time, the OVP protection will not be triggered immediately in this working cycle, but will be in the next two working cycles ( There is a preset time interval between the three working cycles), according to the new judgment standard (whether the discharge time is less than half of the first minimum discharge time), the discharge time is further judged, only when the OVP protection is continuously triggered, The corresponding shutdown protection will be carried out, which can greatly improve the anti-interference characteristics of the constant current LED drive circuit to interference signals.

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 provides a position calibrated detection method and system for a large hook of a spindle type drilling machine. A transmission gear transmits the angular velocity to an absolute value encoder, the absolute value encoder carries out counting, and data is then transmitted to a processing unit to calculate the position of the large hook. The transmission gear is connected with the absolute value encoder via a transmission shaft, the angular velocity and the angular displacement of the transmission gear are the same with those of the absolute value encoder, it is ensured that the transmission gear is engaged with an internal gear at one side of a winch of the spindle type drilling machine, and it is ensured that the die number of the transmission gear is the same with that of the internal gear. Position change of the large hook of the drilling machine is realized by a haulage cable of the winch, so that the rotation angular displacement of the winch is in one to one correspondence with the position of the large hook, and the position of the large hook can be calculated by recording the rotation angular displacement of the winch. Key idea of the detection system and method is segment interpolation, the layer change layer of the cable is selected as the key node to record the present value of the absolute value encoder and the height of the large hook, and the height of the large hook can be directly calculated by utilizing the linear relation between the large hook height and the encoded value in each layer.

The invention relates to a digital three-component wave speed probe which comprises a shell, a sensor core, an electromagnetic mechanism and an elastic arm, wherein the elastic arm is matched with the electromagnetic mechanism and is connected with the shell, and the sensor core and the electromagnetic mechanism are arranged in the shell. The invention is also characterized in that a circuit module is also arranged in the shell; the circuit module comprises a power supply circuit, a central processing controller, a signal acquisition circuit and a digital signal transmission circuit; the signal acquisition circuit and the digital signal transmission circuit are respectively connected with the central processing controller; the signal acquisition circuit comprises a signal acquisition interface; the digital signal transmission circuit is provided with a signal transmission interface and a communication port connected with the central processing controller; the signal acquisition circuit comprises an acquisition channel for acquiring vibration signals; and a signal modulating circuit transmits the vibration signals which are converted into digital signals to a signal receiving end of a ground instrument.

The invention relates to a bridge grabbing crane of a trolley chain wheel positioning system with an absolute value encoder. The bridge grabbing crane comprises guide rails, a crane trolley and a control device, wherein a plurality of garbage feeding ports are formed below the guide rails; the crane trolley is connected onto the guide rails in a sliding manner through trolley wheels; a winding drum is mounted on the crane trolley, is connected with a grab bucket through steel wire ropes, and rotates under driving of a motor and a speed reducer; a chain wheel box is fixed on one side of the crane trolley; a chain wheel shaft is connected inside the chain wheel box through a bearing in a rotating manner; a chain wheel is connected onto the chain wheel shaft in a sleeved manner; a chain extending along the length directions of the guide rails is connected onto the chain wheel; one end of the chain wheel shaft is connected with the absolute value encoder; the absolute value encoder is electrically connected with the control device. The system can solve the problem of positioning of the crane, and the positioning precision of the system can be greatly improved.

The invention discloses a method for forecasting the operation life of an integrated circuit based on phase shifting electronic speckle pattern interferometry (ESPI). The method is characterized by measuring the change rule of the off-plane displacement of the packaged surface of the integrated circuit test piece under the temperature accelerated life test through phase shifting ESPI, determiningthe failure point, computing the failure activation energy according to the relationship between the off-plane displacement of the failure point and the temperature curve and finally forecasting the life according to the established life forecasting model. The method can measure the information of the whole surface while measuring the surface displacement of the integrated circuit test piece chip, can realize online continuous detection and is more precise in measurement.