30results about How to "Avoid radio frequency interference" patented technology

The invention provides a temperature adjustment device and method of a focusing ring. Energy is radiated onto the focusing ring by plasma and is downwards transferred to a base by a first thermal conduction pad, an insulation ring and a second thermal conduction pad, the first thermal conduction pad is in contact with a lower surface of the focusing ring, the insulation ring is in contact with a lower surface of the first thermal conduction pad, the second thermal conduction pad is in contact with a lower surface of the insulation ring, the base is in contact with the second thermal conduction pad, cooling and temperature reduction are performed by a cooling system arranged at the base, a heater which is arranged in a shielding ring is started to generate a controllable external heating source, the shielding ring is connected with the ground, energy of the external heating source is transferred to the focusing ring by the shielding ring, a third thermal conduction pad, an insulation ring and the first thermal conduction ring, the third thermal conduction pad is in contact with the shielding ring, the insulation ring is in contact with the third thermal conduction pad, and controllable temperature rise is performed on the focusing ring. By providing a good heat conduction cooling path and by combining a heating mode of a controllable parameter, fine control on a working temperature of the focusing ring is achieved, the focusing ring is tunable during etching, so that the process demand is satisfied.

The present invention is a stereo PA amplifier that is mounted inside a desktop computer. It is powered by the computer's 12-volt power supply and receives its input via a stereo mini cable from the computer's audio line out. Standard 8-ohm, non-powered speakers are then hooked up directly to the board via its speaker connector board. The volume of the present invention is adjusted by the computer's volume controls. The device eliminates the need for an external stereo amp and external mixer, which thereby reduces the installation time, cost, interconnecting cables, and the space needed for the overall computer system, while at the same time providing quality sound.

An integrated electronic system housing and magnet structure (12) for an imaging system (10) includes a housing (40) and a radio frequency shield (46). The housing (40) is coupled to the magnet structure (13) and contains imaging system support electronics (42). The radio frequency shield (46) is coupled to the housing (40) and prevents radio frequency interference of a radio frequency receiver coil (30) from the imaging system support electronics (42).

The present invention provides a method and system for avoiding terminal radio frequency interference. The terminal supports a first mode and a second mode; a first frequency band in the first mode and a second frequency band in the second mode interfere with each other. The method comprises: when the terminal initiates a first service, if the first service is initiated at the first frequency band, querying whether an ongoing second service works in the second frequency band; if the second service works in the second frequency band, setting the first frequency band to a disabled state, and sending to a network side information of the first frequency band set to the disabled state. The above method and system for avoiding terminal radio frequency interference do not require any change on the network side or addition of signaling between the network and the terminal. The radio frequency interference can be avoided by just using related messages in the existing network, and frequency band resources can be saved, thereby improving the utilization rate of the high-frequency band resources.

The invention provides a composite board and application thereof as a composite material for a fireworks and crackers transport vehicle carriage. The composted board proved by the invention comprises an armor plate, a polymer cellular material layer, a glass fiber reinforcement resin composite layer and an electric-conduction elastic alloy layer. The armor plate and the polymer cellular material layer can be bonded together with unsaturated polyester resin doped with reinforced fibers. The polymer cellular material layer and the glass fiber reinforcement resin composite layer can be bonded together with a polyurethane adhesive. The glass fiber reinforcement resin composite layer and the electric-conduction elastic alloy layer can be bonded together with polyamide viscoelastic resin. The composite board provided by the invention has the characteristics of light weight and high strength and multiple functions of retarding flames, insulating heat, attenuating the vibration of explosive blasts, conducting and dissipating static electricity and preventing radio frequency. The fireworks and crackers transport vehicle carriage made of the composite boards can sufficiently guarantee the transportation safety of explosives, such as fireworks, crackers and the like.

The invention relates to the field of energy-saving control of a central air-conditioning system, in particular to an energy-saving control cabinet of an air conditioning unit. The energy-saving control cabinet comprises a cabinet body and a cabinet door. A three-phase circuit breaker, three current transformers, a power frequency bypass contactor, a variable frequency switching contactor, a motor overload protector, a frequency converter, an intermediate relay and a single-phase miniature circuit breaker I are arranged on a lower mounting plate in the cabinet body. A single-phase miniature circuit breaker II, a direct-current switch power supply and an intelligent data processing unit are arranged on an upper mounting plate in the cabinet body. An intelligent operation touch screen is disposed on an upper cabinet door plate of the cabinet door. An alternating-current ammeter, an electricity meter, an alternating-current voltmeter, a signal indicating lamp, a manual frequency adjusting knob, a frequency operator operation panel, a start-stop button, a manual / automatic selection change-over switch, a three-phase main circuit breaker operating handle and a power frequency / variable frequency selection switch are disposed on a lower cabinet door plate of the cabinet door. By the energy-saving control cabinet, water valves and fans of the air conditioning unit can be intelligently controlled according to load changes, simplicity in mounting and debugging is realized, and energy-saving control on the air conditioning unit is realized.

A locker for receiving and retaining one or more packages includes an enclosure, the enclosure defining a storage cavity, the storage cavity configured to receive and retain the one or more goods, a radio signal sensing assembly disposed on the enclosure for sensing radio signals, the radio signal sensing assembly disposed on the enclosure in an orientation such that the radio signal sensing assembly can detect the presence of radio signals within the storage cavity.

This invention relates to a shell of a double-conjugated L-shaped large power electronic ballast including: a lower L-shaped shell, an upper L-shaped shell, a first side cover, a second side cover, two convex / concave points, in which, the two L-shaped shells in a same shape and size form a master shell by conjugating the two points, the end surfaces of both sides of the master shell are square, the two side covers are fixed at the cross sections of both ends and the two conjugated points are in the shape of the nominal convex / concave .

The invention provides a method of radio frequency interference resistance of hop channel in industrial wireless networks and relates to industrial wireless communication networks. The invention is based on the adding of hop channel information and beacon frames of communication protocols of the industrial wireless networks; a coordinator generates and broadcasts hop channel sequences of a system to all devices of a whole network and the hop channel information which contains take-off points of the system and the take-off points of an adjacency system is added into the load of the beacon frames; a router and a terminal device analyze the beacon frames and an unused take-off point is selected as the present take-off point; the coordinator and the router dynamically evaluate the channels of the networks and define the interfered channels by packet loss rates; the coordinator shields the interfered channels; a next channel of the interfered channels in the hop channel sequences replacesthe position of the interfered channels in the hop channel sequences; the radio frequency interference between industrial wireless network systems within the scope of the same radio frequency can be effectively avoided. The method can greatly improve the coexistence of industrial wireless network communication environments and the anti-interference capability.

The present invention discloses a plasma processing apparatus, which comprises a reaction chamber. An upper electrode and a lower electrode are arranged in the reaction chamber. A power supply device is arranged below the lower electrode and is used for applying a radio frequency (RF) power to the lower electrode. A pipeline and an electric wire are arranged below the lower electrode. The power supply device comprises a hollow RF conveying pipeline. The pipeline and the electric wire are arranged inside the hollow RF conveying pipeline. In this way, the space inside the lower electrode is greatly saved, so that other parts can be improved in the larger space of the lower electrode. Meanwhile, a liquid conveying pipeline, a gas conveying pipeline and electric wires, which are made of soft materials, are placed inside the RF conveying pipeline of a relatively fixed shape. Therefore, the influence of the distance change between the RF conveying pipeline and a grounding ring, due to the change in shape or position during the process, on the electric field distribution inside the reaction chamber, can be avoided.

The invention belongs to the field of production automation, and provides a method and system for writing values to a wireless communication computer product sample. The method includes the following steps: arranging a test computer having N wireless network cards, establishing the only wireless communication connection between each of M wireless network cards with each of M wireless communication product machine samples which are disposed in a shielding box; a test computer writing identity identifying key words of each wireless communication computer product sample to M wireless communication computer product samples; and after writing the identity identifying key words, the test computer turning off the only wireless communication connection between each wireless network card and each wireless communication computer product sample. According to the invention, the technical solution has the following characteristics: 1. increases test efficiency; 2. avoids radio frequency interference caused by poor shielding of the shielding box; and 3. is applicable to all wireless communication products which are unable to be joined through communication wire material interfaces, and also protects consistency of product appearance and production.

An ignition system (10) for an internal combustion engine has a power supply, a transformer (22) having first and second primary windings (32 and 33) and a secondary winding (30), extending from the secondary winding and adapted to A connector for terminal connection of a spark plug (18) of an internal combustion engine, and an electronic ignition timing circuit (42) cooperating with a transformer to activate and deactivate voltage to the first and second primary windings. The first and second primary windings are connected to the power supply such that the transformer produces an AC voltage output from the secondary windings between 1 kHz and 100 kHz and at a voltage of at least 20 kV. A forced push-pull inverter (82) works in conjunction with an electronic ignition timing circuit to fix the frequency of the voltage to the first and second primary windings.

The invention discloses a differential audio system supporting single-ended signals and a control method. The system includes an audio access module and a differential signal processing module; wherein, the audio access module includes a P input end, an N input end, a P input output terminal and N output terminal; the differential signal processing module includes a P input terminal and an N input terminal; the audio access module is used to receive audio signals from the external audio equipment and control the differential signal processing module. The working state of the N input terminal is also used to convert the single-ended signal into a differential signal when the audio signal is a single-ended signal. By using the embodiments of the present invention, the differential audio system can support single-ended signal input while avoiding signal loopback and radio frequency interference.