30results about How to "Received signal is stable" patented technology

The invention discloses a protection framework apparatus for vehicle-mounted communication equipment. The protection framework apparatus includes a protection frame, wherein a first fixed base is arranged at the bottom of the outer surface of the protection frame, and a balancing device is arranged at the middle of the bottom of an inner cavity of the first fixed base; a storage entry is arrangedat the middle position of the top of the protection frame; the surface of the surface of the storage entry and the top of the protection frame are slidably connected with a protective top cover; a first opening is formed in middle position of the upper surface of the protective top cover; and the surface of the first opening is inlaid with a balance scale. The invention relates to the technical field of vehicle-mounted communication equipment. The protection frame apparatus for vehicle-mounted communication equipment achieves the purpose of automatically leveling the communication equipment, is conductive to reception of signals stably, and has good buffer damping and fixing effect on the communication equipment, thereby effectively preventing loosing and shedding of internal parts of thecommunication equipment due to collision, so as to prolong the service life of the communication equipment.

An airborne ultrasonic sensor is obtained in which a sensor body and a housing have an integrated structure, and which can reduce spurious waves which propagate through the housing to arrive at the sensor body. The sensor is provided with the sensor body that radiates ultrasonic waves into air and at the same time receives reflected waves from a reflection source which exists in the air, a transmission and reception device that drives the sensor body and at the same time obtains a distance to the reflection source or a propagation speed of sound based on the reflected waves, and the housing that has the sensor body fixedly secured thereto with an integrated structure. The housing has groove portions which are different in acoustic impedance from their surroundings. The groove portions are arranged obliquely regarding either one of a horizontal direction or a vertical direction of the sensor body.

A stretchable antenna assembly and a notebook computer with the antenna assembly thereof, comprising an antenna module and a holder which respectively has a guiding unit corresponding to the antenna module and the holder, and further the antenna module couples to a signal transmission element for activating with a first conductive element disposed at one side of the holder, resulting in preventing the antenna signal transmission from being interrupted whenever the antenna module is open or closed, and in further ensuring the precise locating function, and strengthening the receipt of signal.

The invention provides an energy-saving device for an electronic product. The energy-saving device comprises a primary battery, a first storage battery, an electric energy switching device, a backlight mirror, keys, a light-emitting board, a compression spring piece, a second storage battery, a relay, a printed circuit board, a single chip microcomputer, an analog-to-digital converter, a temperature sensor and a fan, and the upper end of the primary battery is connected with the first storage battery and the electric energy switching device. By the design, mixed use of traditional electric power and new energy is realized, the backlight mirror is mounted at the front end of the light-emitting board, the keys are mounted at the front end of the light-emitting board, the compression spring piece is assembled at the rear end of the light-emitting board, and the second storage battery is arranged at the rear end of the compression spring piece. According to the design, the keys are illuminated, the single chip microcomputer and the analog-to-digital converter are welded on the printed circuit board, the upper end of the single chip microcomputer is connected with the temperature sensor, the fan is assembled at the upper end of the temperature sensor, and an intelligent cooling function is achieved. The energy-saving device is convenient to use, good in cooling effect and stability and high in reliability, mixed energy can be shared, and the keys can be brightened.

The invention relates to a multi-target six-freedom-degree electromagnetic positioning device and method, and belongs to an electromagnetic positioning device and method, The device consists of a signal transmitting unit, a signal receiving unit, and a control and data processing unit. According to the positioning demands, the number of signal receiving sensors is selected, and the selected signal receiving sensors are fixed on a positioning target, and generate receiving signals through electromagnetic induction. The control and data processing unit receives a sampling signal, and executes an electromagnetic positioning algorithm. The device solves a problem that a conventional device is poorer in the tracking and positioning of a target moving in a large area in a space, optimizes the positioning method, simplifies a circuit, improves the positioning efficiency, and solves a problem of an error caused by the mutual impact of the position parameter and posture parameter solving processes during six-freedom-degree solving.

The invention relates to a microwave induction LED lamp bulb. The microwave induction LED lamp bulb comprises a lamp cap, a shell connected with the lamp cap, a driving power board located inside theshell, a wireless control module connected with the driving power board, an LED lamp board located on the shell and a lampshade connected with the shell; the LED lamp board comprises a base plate andlamp beads located on the base plate, an installing hole is formed in the base plate, and the shape and size of the installing hole are matched with the shape and size of the wireless control module;the driving power board comprises a fixed hole and electrode zones located around the fixed hole; and the wireless control module comprises a pin and conducting layers, and the conducting layers are matched with the electrode zones in number, size and position. The microwave induction LED lamp bulb is convenient and quick to install, and mechanized production is facilitated; and compared with a traditional manner needing manual welding of the driving power board and the wireless control module, the production efficiency is high, and the production cost is saved.

The invention discloses a multi-input multi-output array type ultrasonic wind measurement system and a measurement method. The wind measurement system includes a mounting seat, several ultrasonic sensors, a fixed bracket, a reflecting hemisphere and a control and processing circuit board, wherein several ultrasonic sensors Set on the top surface of the mounting base, the lower end of the fixing bracket is fixed on the mounting base, and the reflective hemisphere is set on the upper end of the fixing bracket. The specific method is as follows: first step, after the system is powered on, process it in the data processing module; second The first step is to perform sliding average processing; the third step is to perform cross-correlation calculations respectively; the fourth step is to form a measurement surface with any ultrasonic sensor on the x-axis, any ultrasonic sensor on the y-axis and the reflective hemisphere; the fifth step is to Real-time wind speed and wind direction can be obtained by performing the first step to the fourth step cyclically, with beneficial effects: no eddy current is formed, and the received signal is stable; the accuracy of wind speed and wind direction measurement is further improved.