40results about How to "Simple processing circuit" patented technology

The present invention relates to a laser ranging technology and provides a laser phase ranging module. The laser phase ranging module includes a laser emitting assembly, an echo receiving and pre-processing assembly, a local receiving and pre-processing assembly and an FPGA processor; the FPGA processor generates two clock frequencies f1 and f2 by using a phase-locked loop, and a square wave signal with a measurement ruler frequency fs is generated through frequency division based on the clock frequency f1, and the square wave signal is transmitted to the laser emitting assembly; the laser emitting assembly emits laser to a target; echoes reflected by the target are processed by the echo receiving and pre-processing assembly, and then, square waves A of which the frequency is fs can be outputted; the local receiving and pre-processing assembly partially leads in the emitted laser and performs the same pre-processing as the echo receiving and pre-processing assembly on the led-in laser, and then outputs square waves B; and the FPGA processor synchronously reads the square waves A and the square waves B through using the clock frequency f2 and calculates out the distance of the target through data processing. According to the laser phase ranging module, frequency mixing processing is not required, and one measurement ruler can be adopted to realize remote precise ranging. The laser phase ranging module is suitable for single-point ranging and multi-path simultaneous ranging equipment.

In an encoding apparatus or method, variable-length encoding data is packetized by a packetizing format in which a header of a packet has an area for indicating a packet length and the range of values indicating the packet length is limited. Variable-length encoding data is input and the data length of the variable-length encoding data is detected. According to the detection result, the input variable-length encoding data is packetized within the packet-length maximum value which can be specified in the header.

The invention discloses a time-grating angular displacement sensor based on quadrature modulation of light intensity. The time-grating angular displacement sensor comprises a light-emitting element, a movable disc matrix, a fixed disc matrix and a photoelectric detector, wherein the light-emitting element is formed by circumferentially arranging a first power source body, a second power source body, a third power source body and a fourth power source body which have the same size and are driven by sine excitation signals with the same frequency and the same amplitude and the phase difference of 90 degrees respectively; a circle of fan ring-shaped movable disc light transmission surface is arranged on the movable disc matrix; a first group, a second group, a third group and a fourth group of fixed disc light transmission surfaces are circumferentially arranged on the fixed disc matrix; the spatial phases of the fixed disc light transmission surfaces correspond to the illumination regions of the four power source bodies; all groups of the fixed disc light transmission surfaces should meet a certain corresponding relationship with the movable disc light transmission surface; the photoelectric detector comprises a detection head matrix, and photoelectric detection heads which are fixed on the detection head matrix and can receive light fluxes of the four groups of the fixed disc light transmission surfaces at the same time. The time-grating angular displacement sensor can precisely measure an angular displacement, and can reduce the circuit control difficulty, the mounting difficulty and the machining process difficulty.

The present invention provides a kind of laser position judging system and method for judging laser irradiation position. The system includes a photosensitive unit with photodiode to convert received laser beam into electric signal; a signal amplifier unit to amplify electric signal; a signal rectifying unit to convert the rectified signal into positive output signal; a voltage comparison unit with one input end connected to the output of the signal rectifying unit and one other reference voltage input end; and a judging response unit including a responder to the output signal of the voltage comparison unit. When the output signal of the voltage comparison unit is high level, the responder responses to represent sensed laser and two sensing points are found out successively to find the connection line as the horizontal laser position. The present invention completes laser position judgment with photodiodes and simple circuit, and is simple, feasible, low in cost and high in precision.

The invention discloses a method for conducting frequency domain information extending on data symbols in power line carrier communication. When the data symbols are generated in the power line carrier communication, multi-frequency domain information diversity extension is utilized to replace original ROBO extension, the diversity extension is irrelevant to time-varying features of a channel, and is only relevant to the features of the channel, and the diversity extension is completed in one symbol, which is beneficial to simplifying processing circuits of frequency domains, and meanwhile improving of communication reliability.

The invention belongs to the technical field of microwave sensing and relates to a planar microwave cavity drip-in type liquid dielectric substance value detection sensor. A square OCSRR of the detection sensor is fixed on the top surface of a single-sided FR4 substrate; a rectangular detection area exists at the top of the square OCSRR; the rectangular detection area is of a rectangular structure; two output ends of the square OCSRR are connected with two input ends in the rectangular detection area; a three-sided metal rectangular frame is arranged outside the rectangular structure; two endsof the metal rectangular frame are suspended; two metal wires in the rectangular detection area are located in the metal frame; one end of each of the two metal wires is suspended; the metal wires are arranged in the metal frame so as to form a rectangular double-loop form; the two metal wires are parallel to each other; and the direction of the inner metal wire is opposite to that of the external metal wire. According to the invention, a drip-in mode is adopted; a to-be-detected liquid is directly dripped to a sensing area; a high-precision micro-channel does not need to be additionally manufactured; the sensing end is suitable for mass production; and a back-end processing circuit is simple.

The invention discloses a liquid level sensor and uses the Hall effect principle. A rotor firmly connected with a floater component winds back to a rotating shaft and rotates when the liquid level changes, thus causing the change of peripheral magnetic field. As the magnetic field applied on a Hall device changes, the change of an output signal is realized. The specific spatial layout of the rotor, stator soft iron and the Hall device forms a specific magnetic circuit, thus leading the rotation angle of the rotor to form linear relation with the intensity of the magnetic field and the intensity of the magnetic field to form linear relation with the output voltage of the Hall device. Consequently, the linearity between the rotation angle of the rotor and the voltage signal output of the whole liquid level sensor is realized. The liquid level sensor has long service life and the output signal can be directly used by a vehicle instrument.

Some embodiments of the present invention provide an anti-collision device used for a sample-loading system. This device may include a code plate, an optical coupler, a location signal-detecting unit, a drive pulse counting unit and a drive pulse-sending unit. The optical coupler detects the code plate during the relative movement between the optical coupler and the code plate and outputs detection signals. The location signal detecting unit determines whether to output location signals to the drive pulse counting unit. The drive pulse counting unit judges whether collisions occur to the sample-loading system. Some embodiments of the present invention provide an anti-collision method and a sample-loading system comprising the anti-collision device.

The invention provides a portable forward photoacoustic microscopy based on optical resolution. The photoacoustic microscopy comprises a laser diode, a collimating lens, a focusing lens, protective glasses, a shell, a stage, an ultrasonic coupling liquid, an ultrasonic sensor, a lifting platform, a 3D motorized translation stage, a motor driving circuit, a computer, a data acquisition circuit, a signal pretreatment circuit, a clock circuit and a driving power circuit. According to the invention, miniature, inexpensive and easily maintained laser diode is applied to the field of optical resolution photoacoustic microscopy excitation. The portable forward photoacoustic microscope has the advantages of portable volume, high resolution, large imaging depth and simple signal post-treatment circuit, and is quite suitable for nondestructive testing of thin materials or tissue samples.

The invention provides a one-circle double-pulse revolution cycle number counting method for an airburst fuse. A revolution cycle number counting circuit adopted for the one-circle double-pulse revolution cycle number counting method is arranged in a bullet. The revolution cycle number counting circuit comprises a magnetic electron chip, an operational amplifier and a waveform conversion module. The waveform conversion module comprises a comparator A, a comparator B, a resistor R11, a resistor R13, a resistor R14, an isolation resistor R12, a diode D1 and a diode D2. The operational amplifier is used for receiving sinusoidal signals transmitted by the magnetic electron chip in the bullet, amplifying the sinusoidal signals and transmitting the amplified sinusoidal signals to the waveform conversion module. The waveform conversion module converts sinusoidal waves amplified by the operational amplifier into square waves. The revolution cycle number counting module is used for counting the number of square waves output by the waveform conversion module, and therefore the revolution cycle number of the bullet is obtained. The output voltage of the magnetic electron chip is high, and therefore the region adaptability of a weapon is greatly improved. The two comparators of the waveform conversion module compose a window comparator, and therefore each sinusoidal wave can be converted into two of the square waves.

This is oil collector used of the testing platform of injection pump. On this oil collector is installed oil injection sensor. This sensor is not only to ensure every oil cylinder is whether not inject oil but also can to survey every oil cylinder injective moment (or phase angle), then to calculate dynamic injective phase angle. As only to differentiate in the collector is whether not injection, so the sensor's linear degree can be lower, and its construction is simple. The output signals of this sensor are switched signals using to show the injection or not injection, so its resist disturbed ability is strong.

The invention provides a portable forward photoacoustic microscope based on optical resolution. The photoacoustic microscope comprises a laser diode, a collimating lens, a focusing lens, protective glasses, a shell, an objective table, an ultrasonic coupling liquid, an ultrasonic sensor, a lifting platform, a 3D motorized translation stage, a motor drive circuit, a computer, a data acquisition circuit, a signal pre-treatment circuit, a clock circuit and a driving power circuit. According to the invention, miniature, inexpensive and easily maintained laser diode is applied to the field of optical resolution photoacoustic microscopy excitation. The portable forward photoacoustic microscope has the advantages of portable volume, high resolution, large imaging depth and simple signal post-treatment circuit, and is quite suitable for nondestructive testing of thin materials or tissue samples.

A high-capacity common-mode inductor processing circuit for network signal is disclosed. Each of high-capacity common-mode inductors is disposed between two adjacent circuit channels to perform signal coupling, and each high-capacity common-mode inductor has parasitic capacitance between primary and secondary sides thereof, each of autotransformers is disposed on a side of corresponding one of the high-capacity common-mode inductors, and center tap lines of the autotransformers are grounded. The high-capacity common-mode inductor includes an iron core post and an iron core cover, the iron core post includes a winding part to be wound by conductive wires, and the conductive wires are wound on the winding part by a preset number of turns, and upwardly stacked and wound on the winding part by a preset layer number. The high-capacity common-mode inductors and the parasitic capacitances can eliminate noise on the circuit channels and perform signal coupling.