42results about How to "Solving Electromagnetic Compatibility Issues" patented technology

The invention relates to a power amplifier for a satellite communication system and the satellite communication system. A power amplifier for a satellite communication system includes a first functional module; a second functional module; a shielding sleeve, the two ends of the shielding sleeve are respectively connected to the first functional module and the second functional module; and a cable piece, a cable piece Both ends of the cable are respectively electrically connected to the first functional module and the second functional module, and the cable part is passed through the shielding sleeve. A satellite communication system includes the aforementioned power amplifier for the satellite communication system. The cable parts are passed through the shielding sleeve, which solves the problem of electromagnetic compatibility compared with the traditional installation method of multiple plug-in connectors, and has a simpler structure and is easier to assemble and disassemble.

The present invention relates to the technical field of data line installation equipment, in particular to a data line installation frame for a block chain server with an anti-falling effect, including a device body, and a fixed frame is fixedly connected to the inside of the device body, and the fixed frame The inside is fixedly connected with a positioning frame, and the left and right sides of the positioning frame are fixedly connected with conductive coils. There is an auxiliary positioning ring, which is further fixed by the data cable inside the clamping plate, so as to avoid the data cable from being detached when people trip over the data cable, and at the same time, it can well ensure that the server will not lose data when it is running. By arranging the data lines, the data lines are avoided from being entangled together, so that the problem of electromagnetic compatibility can be well solved, and at the same time, it is convenient for the staff to quickly find the corresponding data lines when overhauling the data lines.

The invention provides a double-reflection single-transmission three-wave-beam included angle metasurface antenna, and aims to simplify an antenna structure while realize three-wave-beam radiation inan all-region space. The antenna comprises a transmission metasurface unit and a feed source clamped between flat plate waveguides; the transmission metasurface unit comprises four V-shaped transmission metasurface structures nested in sequence; the tail ends of two arms of the V-shaped transmission metasurface structure closest to the feed source are connected one reflection metasurface unit to form an included angle metasurface structure; the feed source is fixed on the outer side of the caliber surface of the included angle metasurface structure and positioned on the central axis of the structure; each V-shaped transmission metasurface structure comprises a V-shaped substrate plate, wherein the side surfaces, towards the feed source, of the two arms are equipped with metal patches withgap rings etched in the centers in a printing manner; the patches are positioned on the same plane in the normal direction of the arms; the reflection metasurface structure comprises a rectangular substrate plate; the side surface, towards the feed source, of the substrate plate is equipped with a resonant ring in a printing manner, while a metal bottom plate is printed on the other side surface.

The invention relates to a device for detecting intervertebral disc pressure, comprising a plurality of resistance strain gauges (1) which are stuck to the detected position of the surface of intervertebral disc and used for detecting signals and a stress detection transmitter (2) which is electrically connected with the resistance strain gauges (1), wherein the stress detection transmitter (2) comprises inner bridge units, operation amplifier units, analog-to-digital conversion units and wireless transmission modules which are successively electrically connected; the inner bridge units and the corresponding resistance strange gauges (1) constitute bridges; the resistance strain gauges (1), the inner bridge units, the operation amplifiers and the analog-to-digital conversion units have the same number and correspond with one another. The device further comprises an upper computer which is in wireless communication with the stress detection transmitter (2). The device can realize trauma-free direct nondestructive test or measurement of pressure of intervertebral disc.

The invention discloses an integrated design high power density two-speed electric drive device for crawler vehicles, comprising a left two-speed transmission, a left drive motor, a right drive motor, a right two-speed transmission, a drive motor controller, a high-voltage line bundle. Among them, the left two-speed transmission, the left drive motor, the right drive motor, and the right two-speed transmission are coaxially arranged, and the drive motor controller is installed above the left two-speed transmission and the right two-speed transmission; the high-voltage wiring harness is respectively connected to the drive Motor controller and left drive motor, drive motor controller and right drive motor. The electric driving device of the present invention is a compact structure, with high power density, light overall weight, small space occupation of the power cabin, no complicated connecting pipelines, overall hoisting, convenient replacement, high allowable working speed, and long-term stable operation Good performance, simple and reliable sealing structure, etc.

The invention relates to an SAR and wireless communication integrated system. An output end of an FPGA controller is connected with an input end of a D / A converter, the output end of the D / A converter is connected with the input end of an analog transmission channel, the output end of the analog transmission channel is connected with the input end of an A / D converter, the output end of the A / D converter is connected with the input end of the FPGA controller, a circulator is in two-way communication with a phased-array antenna, and the FPGA controller is in two-way communication with a digital beam forming module. The invention further discloses an implementation method of the SAR and wireless communication integrated system. The SAR and wireless communication integrated system provided by the invention achieves a broadband wireless mobile communication function, not only reduces the requirements on the volume and weight of the equipment, but also reduces the energy consumption and avoids the problem of complex electromagnetic compatibility to a certain extent.

The invention relates to an LED light panel, scanning card and their combined structure as well as LED display screen control system. The combined structure comprises the LED light panel and the scanning card. The LED light panel comprises a first circuit board, an LED display driving circuit, a signal driving chip, a network transformer and a network port. The first circuit board is provided with a scanning card welding zone. The LED display driving circuit, the signal driving chip, the network transformer and the network port are arranged on the first circuit board. The network transformer is electrically connected between the scanning card welding zone and the network port. The signal driving chip is electrically connected between the LED display driving circuit and the scanning card welding zone. The scanning card is electrically connected to the scanning card welding zone of the first circuit board. According to the invention, complicated and redundant wiring is not required for connections between a scanning card and an LED light panel as well as between the LED light panels in the prior art, therefore, overcoming the shortcomings in wirings.

The invention discloses a double-phase zero-crossing signal detection circuit required by a bidirectional spark ignition circuit, and an optical fiber signal transmission system. The detection circuitcomprises an input RC filter circuit, a positive and negative half-cycle zero-crossing signal detection and pulse driving circuit, and a positive and negative half-cycle zero-crossing detection pulsefiber transmitter and receiver. One end of the positive and negative half-cycle zero-crossing signal detection and pulse driving circuit is connected with a power frequency alternating current through the input RC filter circuit, and the other end is connected with the positive and negative half-cycle zero-crossing detection pulse fiber transmitter. The positive and negative half-cycle zero-crossing detection pulse fiber transmitter transmits a zero-crossing detection pulse to the positive and negative half-cycle zero-crossing detection pulse fiber receiver, and finally transmits the zero-crossing detection pulse to a single-chip microcomputer. The circuit can simultaneously meet the requirements of the AC zero-crossing signal detection, the AC electrode polarity detection and the high-speed fiber pulse signal transmission, is simple in circuit principle, and is easy to manufacture and debug.