12 results about "Signal analyzer" patented technology

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.

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.

A sensing system for a mixture, comprising a sensing region containing the mixture. Within the sensing region is a sensor, which includes a printed circuit board (PCB), a transmitting electrode configured to generate an electric field, and a receiving electrode. The transmitting and receiving electrodes are configured to be in direct contact with the mixture. The sensor is configured to detect electrical parameter values ​​of the mixture. The system further includes a signal analyzer that determines the water content of the mixture based on the detected electrical parameters.

This invention provides an axial conversion device for a multi-axis accelerometer sensor, belonging to the field of precision instrument testing. The device includes a sensor under test, a signal analyzer, and a housing. A first cable holder is located at one end of the housing, and a second cable holder is located at the other end. The first cable holder has multiple input terminals, which are electrically connected to multiple output terminals of the sensor under test. The second cable holder is electrically connected to the input terminal of the signal analyzer. An axial adjustment module is located inside the housing. The axial adjustment module includes a line switching device, output contacts, and multiple input contacts. The multiple input contacts are electrically connected to the multiple input terminals of the first cable holder, and the output contacts are electrically connected to the second cable holder. The axial conversion device for a multi-axis accelerometer sensor provided by this invention can solve the problems of low continuity and low safety in the prior art.

This utility model relates to the technical field of measurement devices, and discloses a multi-path synchronous measurement device, including a vector signal generator and a vector signal analyzer. A signal storage unit is provided between the vector signal generator and the vector signal analyzer. The signal storage unit is used to sequentially receive and store multiple vector frequency signals generated in the vector signal generator, and to sequentially receive and store multiple acquisition frequency signals set in the vector signal analyzer. It also includes a controller and a device under test (DUT). The controller is electrically connected to the signal storage unit, and the DUT is electrically connected to both the signal storage unit and the vector signal analyzer. This utility model aims to increase measurement speed and improve testing efficiency.

A first detector that receives and detects 3-tone signals of three patterns of a first 3-tone signal obtained by combining three waves of angular frequencies ω1, ω2, and ω3 (here, ω2−ω1=ω3−ω2=Δω is established), a second 3-tone signal in which each tone has a phase offset, and a third 3-tone signal having a phase offset different from the phase offset of the second 3-tone signal, a BPF that allows only a beat component of an angular frequency difference Δω between adjacent waves of the 3-tone signals among signals output from the first detector to pass, a second detector that detects power of the beat component that has passed through the BPF, a voltmeter that measures a voltage of a signal output from the second detector, and a phase calculator that calculates a phase based on the measured voltage values of the three patterns.

A micro-electro-mechanical system (MEMS) apparatus includes at least one semiconductor device, a power supply, a transimpedance amplifier, a lock-in amplifier, a signal analyzer, and a processor. The semiconductor device has a MEMS structure, an input electrode, and two anchors. The two anchors of the MEMS structure are respectively fixed and could serve as output electrodes, the input electrode is adjacent to a long side of the MEMS structure, and the MEMS structure includes five sections having different widths. The power supply is electrically connected to the input electrode. The transimpedance amplifier is electrically connected to the output electrode. The lock-in amplifier is electrically connected to the transimpedance amplifier and the input electrode. The signal analyzer is electrically connected to the transimpedance amplifier. The processor is electrically connected to the signal analyzer.

The application relates to a method suitable for MIMO channel simulator to realize in-band amplitude and phase flatness calibration, which comprises the following steps: generating a known comb spectrum signal through an internal DAC, connecting to a signal analyzer after passing through a radio frequency channel to collect and analyze the IQ signal, and completing amplitude and phase compensation data calculation of all M transmitting ports; configuring the channel simulator as a MIMO N*1 mode, taking one transmitting channel TX after the first stage calibration as a transparent channel, and calculating amplitude and phase compensation data of all N receiving ports. The method, device, processor and computer readable storage medium thereof suitable for MIMO channel simulator to realize in-band amplitude and phase flatness calibration can realize comprehensive amplitude and phase calibration, realize in-band amplitude and phase flatness calibration of the radio frequency channel of the MIMO channel simulator, effectively improve the system signal-to-noise ratio, and maximally reduce the influence of hardware on channel simulation; can reduce the system cost and the requirement for instruments, and reduce the overall cost of the calibration system.

This application provides a broadband DC-DC conversion circuit and a signal analyzer. The broadband DC-DC conversion circuit includes a low-frequency I / V module, an AC coupling module, a low-frequency amplification module, and a low-frequency superposition module. The low-frequency I / V module accurately samples the low-frequency current from the output signal of the preceding devices and converts it into a voltage signal. The AC coupling module filters DC and low-frequency components to obtain high-frequency signals. The low-frequency amplification module sums and amplifies the low-frequency signals. Finally, the low-frequency superposition module superimposes the amplified low-frequency signals with the high-frequency signals to form a broadband signal. This circuit realizes flexible conversion of signal DC bias and full-band signal transmission between cascaded devices. It not only solves the conflict caused by the difference in DC bias potential between the preceding and following stages and ensures stable signal transmission, but also widens the signal bandwidth, improves signal quality, and meets the diverse signal processing needs of complex circuit systems.

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.

A system for continuously monitoring at least one machine including at least one magnetic sensor sensing magnetic fields emitted by at least one machine, at least one vibration sensor synchronously sensing vibrations emitted by the at least one machine, a signal analyzer receiving at least a portion of the magnetic field emission signals and vibration signals and performing analysis thereof, the signal analyzer providing an output based on the analysis, the output including at least an indication of a condition of the at least one machine, and a control module initiating at least one of a repair event on the at least one machine, an adjustment to a maintenance schedule of the at least one machine and an adjustment to an operating parameter of the at least one machine based on the indication, whereby efficacy of the at least one machine is improved.