5 results about "Electronic tuning" patented technology

The application discloses an electronic tuning type multifunctional sensor and a preparation method thereof. The sensor comprises a quartz crystal, a composite electrode and an oscillation circuit; the first end of the composite electrode is connected with the first end of the oscillation circuit, the second end of the oscillation circuit is connected with the first end of the quartz crystal, the second end of the quartz crystal is connected with the second end of the composite electrode, and the second end of the oscillation circuit is an output end. The composite electrode comprises a substrate, a planar inductive microelectrode and a planar capacitive microelectrode which are arranged on two sides and are connected in series through a via hole; a nano-magnetic iron oxide film is deposited on the inductive side, a hydroxylated ultra-high specific surface area disordered porous carbon film is deposited on the capacitive side, and a perfluorosulfonic acid protective layer is coated on the surfaces of the two films. The application forms a frequency selection network by connecting the double-sided electrode and the quartz crystal in series, and outputs an anti-interference frequency signal; the protective layer is insulated and prevents short circuit on the inductive side, and improves the humidity response on the capacitive side; manual overturning can switch the detection of metal damage, non-metal defects and environmental humidity, and the sensor has the advantages of high stability and low cost.

The invention relates to the technical field of micro-electro-mechanical system sensors, and discloses a micro-resonance gas sensor with adjustable inherent frequency and a feedback control method thereof, and the micro-resonance gas sensor comprises a sensor structure, an excitation detection circuit and a packaging structure. The excitation detection circuit is connected with the sensor structure to form a closed loop, and the excitation detection circuit comprises a feedback regulation unit and a triple frequency signal separation module. The feedback adjusting unit extracts a vibration signal of the cantilever beam type micro-silicon resonator and generates feedback exciting force opposite to the vibration acceleration, and the feedback exciting force generates a negative inertia effect to reduce the equivalent mass of the cantilever beam type micro-silicon resonator. By introducing the negative inertia effect, the working frequency and sensitivity of the sensor are improved on the premise that the physical size is not reduced; stray capacitance interference is filtered by using a frequency tripling signal separation technology, so that the signal-to-noise ratio is improved; and the dynamic electronic tuning of the sensitivity and the working point of the sensor is realized by adjusting the feedback gain.

The invention discloses a phased-array antenna beam forming test method in a darkroom-free environment, and relates to the technical field of satellite communication terminal complete machine testing, comprising the steps of initializing test system configuration, setting test parameters, initializing an antenna state, establishing a test environment, and connecting a test antenna with a channel simulator; cross coupling of non-corresponding channels is isolated and reduced through an algorithm, a signal transmission link between a test antenna and a tested antenna is established through a wireless channel by adopting a virtual wire connection mode, non-contact test is realized, beam forming test is performed, a mobile station moves to a preset test area, impedance of the test antenna is adjusted by adopting an electronic tuning mode, and the antenna is tested. The beam former realizes independent control of an uplink and a downlink, analyzes a test result and generates a report, does not need to depend on fixed test facilities such as a microwave anechoic chamber and a calibration tower, can directly test in an actual working scene, and is particularly suitable for field test of mobile equipment such as a large vehicle-mounted phased array system.

The present application relates to the field of tactile sensing and integrated photonics technology, and particularly relates to a FBG tactile sensing real-time processing system based on a single micro-ring resonator, comprising a single-wavelength laser, a circulator, a FBG tactile sensor, a micro-ring resonator, an MPD with avalanche gain, a TIA, an ADC and a PC terminal, the wavelength of the laser falls within the 3dB bandwidth of the FBG sensor, and the micro-ring resonator is provided with an electric tuning structure to regulate the transmitted light intensity; when the electric tuning is fixed, signal demodulation is realized, and when the electric tuning is adjustable, convolution weighting is completed; after photoelectric conversion, amplification and analog-digital conversion, the signal is sent to the PC terminal for processing, and the system has compact structure and high real-time performance. In the present application, through the single micro-ring resonator with an electric tuning structure, integrated processing of tactile signal demodulation and convolution weighting is realized, and demodulation and feature extraction are completed in a single device, thereby shortening the processing link, reducing the cumulative delay and improving the real-time response speed of the system.

The application discloses a control method of a vehicle and the vehicle, and the control method comprises the following steps: when the vehicle is turned off, if the current mode of a sound system is a sports mode, the opening degree of an electronic tuning valve is controlled to be 100% and the electronic tuning valve enters a dormant state; when the vehicle is started, if the current mode of the sound system is the sports mode, the opening degree of the electronic tuning valve is kept as the opening degree corresponding to the situation that the vehicle is turned off and the mode is the sports mode, and the rotating speed of an engine is increased to a first rotating speed threshold; if the current gear is a traveling gear, the rotating speed of the engine is decreased to a second rotating speed threshold and the electronic tuning valve is controlled according to a preset rule, the second rotating speed threshold is smaller than the first rotating speed threshold; if the current gear is a stationary gear, the starting time of the vehicle is acquired; if the starting time is greater than a time threshold, the rotating speed of the engine is decreased to the second rotating speed threshold and the electronic tuning valve is controlled according to the preset rule. The sound wave effect when the vehicle is started in the sports mode is increased, and the experience of a user of a sports vehicle is improved.