205 results about "Signal analyzer" patented technology

The utility model discloses an acousto-optic coupling three-dimensional flame area temperature field monitoring system, which comprises a computer, a power amplifier, a relay, a loudspeaker, a microphone and a signal analyzer which are sequentially connected, and further comprises a three-dimensional rack, a light field camera and a blackbody furnace, a plurality of groups of loudspeakers and microphones are arranged, and each group of loudspeakers and microphones are located at the same position on the three-dimensional rack; the signal input end of the light field camera is respectively connected with the three-dimensional flame and the blackbody furnace in the three-dimensional rack, and the signal output end of the light field camera is connected with the signal input end of the computer; the blackbody furnace is used for the light field camera to calibrate the relationship between the gray level of the two-dimensional layered flame original brightness image and the radiation intensity; measurement targets of the system are gas temperature and three-dimensional flame temperature in a three-dimensional to-be-measured area which is surrounded by a three-dimensional rack and contains three-dimensional flame, the overall temperature of a gas medium in a three-dimensional space is measured by using a non-contact sound velocity method temperature measurement principle, and a more comprehensive contribution is made to temperature monitoring of a key area of a hearth.

Disclosed in the present invention are a photoelectric terahertz hyperspectral imaging system and method based on a swept-frequency dual-comb. The system comprises: a swept-frequency laser, a distributed feedback laser, a dual-comb generation module, a coupling beam splitter, a spectrum analyzer, a variable optical attenuator, a terahertz mixer, an off-axis parabolic mirror group, a zero bias detector, an electric amplifier and a signal analyzer, wherein the tunable distributed feedback laser is mixed with electro-optical dual-comb light to generate a swept-frequency terahertz dual-comb signal, point-by-point imaging of an object is realized by means of grid scanning, the swept-frequency dual-comb breaks the trade-off between a spectral bandwidth and a frequency resolution in a dual-comb system, and a frequency resolution of 50 MHz is achieved under a spectral bandwidth ranging from 220 GHz to 320 GHz. Scanning dual-comb terahertz imaging has a higher data collection rate, a more flexible spectral tuning range and a higher frequency resolution at room temperature, and the system is flexible and configurable, and has a simple structure and a high detection efficiency.

The invention discloses a mobile phone data line detection and analysis system, which relates to the technical field of data line detection and is characterized in that a suitable high-speed transmission test environment is created for a data line through a test environment construction module, and signal quality is monitored by equipment such as an oscilloscope and a signal analyzer; the data monitoring module detects a signal transmission bit error rate amplification index and a delay fluctuation index in real time in an environment with or without electromagnetic interference; the data analysis module converts the detection data into a comprehensive feature vector and inputs the comprehensive feature vector into a machine learning model to generate a signal quality index; the comparative analysis module compares the signal quality index with a set threshold value and divides the quality of the data line; and the optimization module predicts the abnormal degree of the low-quality data line, and if the abnormal degree is serious, optimization measures are taken, so that the anti-interference performance of the data line is effectively improved, the error rate and delay fluctuation in the data transmission process are remarkably reduced, and reliable communication and data integrity between equipment are ensured.

The invention relates to the technical field of signal demodulation, and discloses an OFDM (Orthogonal Frequency Division Multiplexing) signal demodulation method of a signal analyzer. According to the invention, through joint optimization of a synchronous detection and frequency offset compensation mechanism, the symbol positioning precision in a low signal-to-noise ratio environment is improved, and subcarrier interference caused by a cyclic prefix pseudo peak value and frequency offset phase ambiguity is effectively suppressed; a time-frequency two-dimensional adaptive interpolation strategy is adopted to enhance the robustness of channel estimation to non-uniform pilot frequency distribution and a fast time-varying channel, and data subcarrier response distortion is reduced; in combination with minimum mean square error equalization and dynamic noise reduction processing, inter-symbol interference and a noise accumulation effect are greatly weakened, and the bit error rate performance of a high-noise scene is improved; the error control technology is updated through a closed-loop channel, a demodulation error propagation path is blocked, and cooperative improvement of system demodulation stability and precision in a complex multi-path environment is achieved.

The invention provides a wheel speed detection device and a chip system. The wheel speed detection device comprises a first comparator, a second comparator and a signal analyzer, the first comparator and the second comparator are respectively configured with different reference voltages, and the input end of the first comparator and the input end of the second comparator are used for receiving voltage signals generated by the same wheel speed sensor; and the signal analyzer is used for analyzing the wheel speed information according to the first comparison signal output by the first comparator and the second comparison signal output by the second comparator. Thus, the input signal is subjected to multi-threshold judgment by using a double-comparator structure, so that sensor signals of different current levels can be identified and analyzed uniformly, and compatible processing of sensor signals of multiple protocols is realized. Therefore, the problem that the overall system cost is increased due to hardware redundancy and system complexity increase in a traditional scheme is avoided, and the universality and the integration capacity of the interface module are effectively improved in a low-cost mode.

Disclosed are a system and a method for a high-speed performance measurement. The system includes: a fixing part; a positioner for controlling the rotation of the equipment by controlling the fixing part; a measurement probe; a curved reflective plate for reflecting, in the direction of the measurement probe, an electromagnetic wave radiated by the equipment and transforming the spherical wave of the measurement probe into a plane wave at the position where the equipment is provided; an arc structure including an arc arranged to be adjacent to the fixing part; a probe set including near-filed probes arranged to be spaced predetermined intervals apart from each other on the inner side of the arc; and a control unit, which receives, through a signal analyzer, signal data corresponding to an input signal from some of near-filed probes and the measurement probe.

The utility model discloses a three-dimensional sound velocity method temperature measurement system. The system comprises a computer, a power amplifier, a relay, a three-dimensional rack, a loudspeaker, a microphone and a signal analyzer. According to the utility model, the overall temperature of a gas medium in a three-dimensional space is measured by using a non-contact sound velocity method temperature measurement principle, and a more comprehensive contribution is made to temperature monitoring of a key area of a hearth; according to the utility model, mature devices such as the microphone and the loudspeaker are utilized, and the measurement sequence is controlled through the relay, so that the measurement speed and efficiency are improved; interference to the to-be-measured area in the measurement process is reduced to the maximum extent, and the measurement precision is improved; the influence of factors such as measurement background noise, sound wave attenuation and reverberation is considered, a sound source signal and a time delay estimation method are selected according to actual conditions, and the sound wave flying time measurement precision and the three-dimensional temperature field reconstruction precision are improved; the three-dimensional sound velocity method temperature measurement can be expanded to measurement of three-dimensional to-be-measured areas in other shapes except a cube, and has good applicability.

The utility model discloses a real-time monitoring device for stay cable force tension, which relates to the technical field of bridge construction equipment and comprises a workbench, a real-time monitoring mounting component is arranged at the top of the workbench, and a mounting plate at the top of the workbench guides and positions a mounting seat through a guide plate at the right front end of the top and a positioning disc. A hydraulic air cylinder can adjust the use height of a supporting plate, a real-time camera performs real-time monitoring work when used for stay cable bridge construction, a positioning module performs positioning work on the real-time camera, and a supporting shaft arranged behind a limiting mounting frame performs positioning and reinforcing work on the limiting mounting frame through the supporting shaft. The real-time camera is electrically connected with the signal receiving module through the positioning module, monitored data are analyzed through the signal analyzer and then transmitted to the data controller through the signal transmission rod by means of the data import block, and the data are collected through the monitoring data collector and then displayed on the displayer.

The invention relates to the technical field of unmanned aerial vehicle detection countering, and discloses a mooring type unmanned aerial vehicle detection countering system based on power line carrier control, and the countering system is composed of a radio interference module, a drive-by-wire unmanned aerial vehicle control module, a four-direction mooring positioning module, a system integration control module and a performance optimization module. The radio interference module is composed of a high-power radio transmitter, a frequency selector, a signal analyzer and an interference mode switcher, interference signals are accurately controlled and adjusted through the multi-component design, it is ensured that all key links including control, navigation and video transmission links are covered, the interference mode switcher is switched among different interference modes, and the interference mode switcher is switched among different interference modes. The unmanned aerial vehicle is controlled in a wired mode, the influence of radio interference on the unmanned aerial vehicle is avoided, the stability and reliability of the unmanned aerial vehicle in a radio interference environment are ensured by the wired control mode, and the beneficial effects of effectively sending countering signals to the ground, minimizing a shielding blind area and maximizing countering efficiency are achieved.

A pad carrying an array of ECG electrodes can be used to measure ECG signal amplitudes and AMSA, a signal analyzer determines a cardiac position with respect to the pad, and an indication of cardiac position with respect to indicia can be provided on a top surface of the pad for output to the user to guide in performing chest compressions during CPR. The pad may integrate a defibrillator electrode. The apparatus may be an automated external defibrillator (AED).

The invention relates to a low-level sweep current test system and a low-level sweep current test method. The low-level swept current test system comprises a computer device, a signal analyzer and a transceiver. The signal analyzer is used for sending low-level sweep frequency signals to the transceiver based on the plurality of output frequency points under the control of the computer equipment; the transceiver is used for radiating electromagnetic waves based on the low-level sweep-frequency signals and detecting induced current of a cable in the detected electronic equipment under the electromagnetic waves to obtain a plurality of target current signals; the signal analyzer is also used for automatically following the output frequency point to receive a plurality of target current signals; and the computer equipment is used for acquiring the target current signal and determining a target transfer function value of the cable based on the target current signal. According to the embodiment of the invention, the output signal and the receiving signal in the signal analyzer are synchronized through the phase-locked loop, the target current signal is received by automatically following the output frequency point, and the frequency offset error of the output frequency point and the receiving frequency point can be avoided.

A system that enables safe cardiac pulsed field ablation by using multiple types of sensors on a patch to detect and cross-check that the heartbeat is in a safe phase to receive an ablation pulse. The patch may contain for example any or all of ECG electrodes, PPG sensors, accelerometers, and microphones. The patch may also contain one or more pulse return electrodes for unipolar ablation. A signal analyzer coupled to a pulse generator may receive sensor data from the patch and may analyze this data to determine the heartbeat phase. If data from different sensors are inconsistent, then pulse generation may be disabled as a safety feature. Otherwise, pulses may be enabled when the heartbeat is in a safe phase; for example, pulses may be excluded during the T wave.

The invention belongs to the technical field of baijiu perception analysis, and provides a baijiu flavor perception evaluation method based on electroencephalogram and surface myoelectricity, and the method comprises the following steps: S1, collecting electroencephalogram signals; s2, collecting surface electromyogram signals; s3, physiological electric signal preprocessing and analysis are carried out based on EEGLab and a signal analyzer in MATLAB, an electroencephalogram data analysis method comprises energy spectrum response and power spectrum density analysis of the brain to the Baijiu samples, and a surface myoelectricity analysis method comprises influence and spectrum analysis of different Baijiu samples on muscles. And carrying out Pearson correlation analysis by integrating the electroencephalogram and surface electromyogram signals with an artificial sensory evaluation result. According to the method, the physiological electric signals are fully used for representing the Baijiu sensing process, the Baijiu flavor sensing evaluation method is established from a relatively objective perspective, and the method has high application value and popularization potential.

A maneuvering assistant system for a vehicle combination comprising an interface configured to receive measurements from a camera, processing circuitry implementing a Kalman filter configured to observe an articulation angle of the vehicle combination on the basis of the measurements from the camera, a signal analyzer configured to repeatedly estimate a signal noise of the camera measurement and to adjust the Kalman filter on the basis of statistics derived from the estimated signal noise, and an assistance unit configured to receive an estimate of the articulation angle from the Kalman filter and provide drive actions based on the estimate.

The application provides a steam delivery pipeline leakage detection system, which comprises a metal conducting rod fixedly connected to the outer wall of a steam delivery pipeline, a sensor connected to the metal conducting rod, a signal analyzer electrically connected to the sensor, and a DCS control center electrically connected to the signal analyzer, and the sensor is used for collecting the vibration sound signal of the metal conducting rod. The steam delivery pipeline leakage detection system of the application can accurately and timely determine the leakage and the position of the leakage point by using the metal conducting rod connected to the steam delivery pipeline to transmit the vibration sound generated by the intense friction between the leakage medium and the pipeline wall, and the sound signal is not obviously attenuated in the transmission process due to the solid medium transmission, the transmission distance is long, and the sound signal is not easily interfered by other signals, the false positive rate of the leakage detection is effectively reduced, the operation and maintenance cost of the steam delivery pipeline is significantly reduced, and the industrial safety is improved.

A system (SYS) for supporting a medical procedure, comprising an interface (IN) for receiving at least one medical input signal that describes a state of a target anatomy. A signal analyzer (SA) is configured to analyze the medical input signal to determine a time window for deployment of a cardio-vascular device (CL) to be deployed by a deployment.

The present invention proposes a method and system for measuring the total radiation power of a 5G terminal in an active darkroom, which belongs to the field of 5G communication technology. It includes: a central processing unit sends a first instruction to a base station simulator, so that the base station simulator transmits a test signal for measuring the total radiation power of the 5G terminal, and the test signal is received by a 5G terminal placed on a two-dimensional turntable via a first antenna; after decoding the received test signal, the 5G terminal radiates the decoded test signal outward via its own antenna at a rated maximum transmission power, so that the second antenna continuously receives measurement data; a signal analyzer calculates the two-dimensional and three-dimensional directional patterns of the electromagnetic field based on the measurement data, and further determines the total radiation power of the 5G terminal. This method uses the gain directional patterns of the horizontal and vertical planes of the antenna to approximate the total radiation power TRP of the antenna, which improves the efficiency of the test and facilitates the realization and completion of automation.

The invention discloses a device and a method for detecting the crushing degree of dry grain particles based on an acoustic emission sensor. The device is composed of an acoustic emission sensor probe, a waveguide rod, a signal conditioning module, a data acquisition module, a signal analysis module, a display module and a single-particle friction collision experiment table. Wherein the front end of the waveguide rod is in contact with particles, and the acoustic emission sensor is mounted on the section of the rear end of the waveguide rod and used for detecting acoustic signals transmitted from the waveguide rod; the signal conditioning module amplifies a signal output by the acoustic emission sensor through a pre-amplifier, and then the acoustic emission signal is acquired through a data acquisition module formed by an acoustic emission signal analyzer; the signal analysis module processes the collected signals by adopting a blind source separation algorithm and a deep learning method to obtain the damage degree of the particles and transmits the damage degree to the display module for display; influence factors and types of particle crushing are explored on a single-particle friction collision experiment table by adjusting particle sizes, particle materials, flat plate inclination angles, flat plate friction coefficients, collision speeds, collision positions and the like. The invention provides a novel grain nondestructive testing technology based on an acoustic emission sensor and a deep learning method.

The application provides a high-sensitivity optical fiber sensor and a distributed vibration detection system, and relates to the technical field of optical fiber sensors.The high-sensitivity optical fiber sensor comprises a sensor and a transparent plastic pipe, the right side of the sensor is fixedly connected with an optical fiber one, the outer wall of the upper part of the transparent plastic pipe is provided with a threaded wall, the threaded wall is threadedly connected with a hollow transparent pipe, and the outer wall of the upper part of the hollow transparent pipe is fixedly connected with four sliding rod groups at equal intervals.A hollow sliding ring is rotated, a pressing type infusion air bag is used to paste and fix colloid coating, the elastic potential energy of springs one and two is used to drive the hollow rod and the pressing rod to be extruded and fixed, the bending between optical fibers is avoided, the influence on the sensitivity of the sensor is avoided, different modules are matched, distributed vibration signals are detected, and then a signal amplifier and a signal analyzer are matched, so that the sensitivity of the sensor is improved, and the use requirement is better met.

This invention belongs to the field of communication technology, and particularly relates to a code Doppler verification device and method. An initial pseudo-random sequence C(t) is periodically sent from a signal source to a wireless channel simulator. The wireless channel simulator adds a code Doppler effect to the acquired initial pseudo-random sequence C(t) to obtain a pseudo-random sequence C′(t), and sends the pseudo-random sequence C′(t) and the initial pseudo-random sequence C(t) to a spectrum and signal analyzer. The spectrum and signal analyzer performs orthogonal demodulation and low-pass filtering on the initial pseudo-random sequence C(t) and the pseudo-random sequence C′(t) to obtain a pseudo-random sequence C0. n (t) and pseudo-random sequence C′ m (t), and the initial pseudo-random sequence C(t) and the pseudo-random sequence C n (t) and pseudo-random sequence C′ m (t) is sent to the host computer; the host computer, based on the initial pseudo-random sequence C(t) and the pseudo-random sequence C... n (t) and pseudo-random sequence C′ m (t) Verify whether the added code Doppler is consistent with the effect of symbol compression or expansion caused by the actual speed.

The invention discloses a device and method applied to a vehicle CAN physical layer test. The device comprises a power supply module, a universal meter module, an actuator module, an oscilloscope module, a controller local area network signal analyzer module, an upper computer module and an electronic control module. The power supply module is respectively connected with the actuator module and the electronic control module; the electronic control module and the controller local area network signal analyzer module are respectively connected with the actuator module; the actuator module is connected with the universal meter module and the oscilloscope module. And the controller local area network signal analyzer module is connected with the upper computer module. The vehicle controller local area network signal CAN physical layer testing device has the advantages that the mode of automatic switching is adopted, rapid fault injection is achieved, a large amount of time of testing personnel is saved, and the testing efficiency of the vehicle controller local area network signal CAN physical layer is greatly improved; the triodes are adopted as the switches, the switching speed is higher than that of traditional switches and relays, the cost of the whole test system is reduced, and the integrity of controller area network signals CAN is guaranteed.

An example system includes a signal generator to output signals based on multiple carrier frequencies; a wired transmission medium for carrying the signals, where the wired transmission medium is configured as open ended to produce reflections on the wired transmission medium of the signals; and a signal analyzer to receive the reflections and to determine a transmission time of a signal along the wired transmission medium based on the reflections. The signal analyzer is configured to perform operations that include performing a search based on an estimated transmission time of the signal along the wired transmission medium and the reflections to determine the transmission time. The search is to determine which of multiple candidate transmission times to select for the transmission time.

1. The name of the design product: signal analyzer (UTS7000A). 2. The use of the design product: the design product is used for measuring frequency, amplitude, phase and modulation parameters, realizing functions such as frequency spectrum analysis and demodulation through frequency conversion and digital processing, and supporting wide-band signal analysis. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

Disclosed are a system and a method for a high-speed performance measurement. The system includes: a fixing part; a positioner for controlling the rotation of the equipment by controlling the fixing part; a measurement probe; a curved reflective plate for reflecting, in the direction of the measurement probe, an electromagnetic wave radiated by the equipment and transforming the spherical wave of the measurement probe into a plane wave at the position where the equipment is provided; an arc structure including an arc arranged to be adjacent to the fixing part; a probe set including near-filed probes arranged to be spaced predetermined intervals apart from each other on the inner side of the arc; and a control unit, which receives, through a signal analyzer, signal data corresponding to an input signal from some of near-filed probes and the measurement probe.

To provide determination of a delay in signal transmission along a wired transmission medium.SOLUTION: An example system includes: a signal generator to output signals based on multiple carrier frequencies; a wired transmission medium for carrying the signals, where the wired transmission medium is configured to be open-ended to produce reflections on the wired transmission medium of the signals; and a signal analyzer to receive the reflections and to determine a transmission time of a signal along the wired transmission medium based on the reflections. The signal analyzer is configured to perform operations that include performing a search based on an estimated transmission time of the signal along the wired transmission medium and the reflections to determine the transmission time. The search is to determine which of multiple candidate transmission times to select for the transmission time.SELECTED DRAWING: Figure 1

The present application discloses a system for evaluating the communication quality in a reverberation chamber, wherein an instrument control device controls a first stirring paddle and a second stirring paddle placed in the reverberation chamber to rotate their respective paddles according to a set step amplitude; after each rotation of the paddle, the signal source generating device is controlled to generate a measurement signal; the signal source generating device generates a measurement signal under the control of the instrument control device; and the measurement signal is sent through the transmitting antenna; a signal analyzer obtains an actual signal received by the receiving antenna; and based on the obtained measurement signal and the actual signal, the communication quality in the reverberation chamber corresponding to each rotation of the paddle under the current amount of absorbing materials is measured. Thus, the communication quality in the reverberation chamber is measured.

An apparatus for generating a sound field description using an input signal having a mono-signal or a multi-channel signal includes: an input signal analyzer for analyzing the input signal to derive direction data and diffuseness data; a low-order components generator for generating a low-order sound field description from the input signal up to a predetermined order and mode; a mid-order components generator for generating a mid-order sound field description above the predetermined order or at the predetermined order and above the predetermined mode and below or at a high order, wherein the mid-order sound field description comprises a direct contribution and a diffuse contribution; and a high-order components generator for generating a high-order sound field description comprising a sound field component above the high order using a synthesis of at least one direct portion, wherein the high-order sound field description comprises a direct contribution only.

An apparatus for estimating an inter-channel time difference between a first channel signal and a second channel signal, comprises a signal analyzer (1037) for estimating a signal characteristic (1038) of the first channel signal or the second channel signal or both signals or a signal derived from the first channel signal or the second channel signal; a calculator (1020) for calculating a cross-correlation spectrum for a time block from the first channel signal in the time block and the second channel signal in the time block; a weighter (1036) for weighting a smoothed or non-smoothed cross-correlation spectrum to obtain a weighted cross correlation spectrum using a first weighting procedure (1036a) or using a second weighting procedure (1036b) depending on a signal characteristic estimated by the signal analyzer (1037), wherein the first weighting procedure is different from the second weighting procedure; and a processor (1040) for processing the weighted cross-correlation spectrum to obtain the inter-channel time difference.

This invention provides a broadband signal analyzer, comprising: at least one superheterodyne frequency conversion receiving unit, at least one filtering unit, an ADC, a digital down-conversion and decimation filtering unit, an adaptive filtering unit, a data processing and display unit, and a scan controller, connected in sequence; the superheterodyne frequency conversion receiving unit includes: an attenuator, a mixer, and a local oscillator signal, the attenuator, mixer, and filtering unit being connected in sequence, the output terminal of the local oscillator signal being connected to the input terminal of the mixer, the input terminal of the local oscillator signal being connected to the output terminal of the scan controller, and the input terminal of the scan controller being connected to the output terminal of the ADC. This invention overcomes the problems of high filter order and excessive processing resource consumption caused by existing broadband signal in-band flatness compensation methods.

The utility model discloses an elevator wireless signal transmission frequency self-adaption optimization system which comprises a car top wireless signal transmission self-adaption device, a machine room wireless signal transmission self-adaption device, a car control unit, a control cabinet and a monitoring room control unit. The machine room wireless signal transmission self-adaptive device is in wireless connection with the car roof wireless signal transmission self-adaptive device, the car roof wireless signal transmission self-adaptive device is electrically connected with the car control unit, and the machine room wireless signal transmission self-adaptive device is in wireless connection with the monitoring room control unit. By adopting the first wireless transceiver and the second wireless transceiver, the signal connection coverage range of the wireless communication system can be improved, and the stability of the signal connection of the wireless communication system is improved in cooperation with the signal analyzer and the frequency generator; and manual intervention and management cost are reduced through automatic frequency adjustment of the frequency generator.