39results about How to "Zero noise" patented technology

The invention relates to a phase shift moire fringe-based digital mask-free photoetching aligning deivce which comprises a computer, an aligning light source, a digital micromirror, a photoetching object lens, a silicon chip, an imager (CCD), a displacement work platform, a first and a second color separation spectroscopes; the first color separation spectroscope receives aligned light and reflects it to a digital micromirror structure which is controlled by the computer to produce a digital grating with constant phase shift; the digital micromirror reflects the aligning light to the photoetching object lens, then the aligning light is transmitted through the second color separation spectroscope; the digital phase shift gratings are sequentially projected to a silicon chip and superposed with grating labels on the silicon chip; the silicon chip reflects the aligning light, then the aligning lightis reflected by the second color separation spectroscope, then the aligned light is received by the CCD; The CCD collects moire fringe images which are multiple frames of moire fringe images with a certain phase shift interval and produced by superposition of the phase shift digital grating with a label grating on the silicon chip.

The invention discloses a plate fixing and heating unit device belonging to the technical field of heat supply and heating. The plate fixing and heating unit device comprises a decorative plate layer internally provided with a heat supply device, a connecting frame and a moisture-proof insulating layer that are sequentially arranged. The plate fixing and heating unit device also comprises a fixedlock arranged between the connecting frame and the moisture-proof insulating layer, and two electrical-connecting blocks arranged on the moisture-proof insulating layer, wherein the two electrical-connecting blocks are respectively a first and a second electrical-connecting blocks when being respectively arranged on two opposite corners of the moisture-proof insulating layer, and are arranged in a negative parallel manner; the two electrical-connecting blocks are respectively first electrical-connecting blocks when being respectively arranged on two adjacent corners of the moisture-proof insulating layer, and are arranged in an equidirectional parallel manner; the heat supply device is arranged in the decorative plate layer, two ends of the heat supply device are respectively connected with the two electrical-connecting blocks; and during the assembly, the electrical-connecting blocks of two unit devices are in mutual contact. The invention can realize the advantages of uniformity in heating, high heat-radiating speed, no need of laying pipelines and damaging family decoration, simpleness in installation, random disassembly, recycling property, good stability, long service life, complete waterproof property, and resistance to pressure and expansion caused by heat and contraction caused by cold, and can be used in floor, bed surface and wall surface heat supply.

The invention provides a movable parallel water-hydrogen power generation inverter system. The movable parallel water-hydrogen power generation inverter system comprises an inverter, a PWM controllerand a power optimization module, wherein the inverter is connected with a fuel cell and a load, and is used for inverting the electric energy generated by the fuel cell and then supplying the electric energy to the load to be used; the PWM controller is used for sending an adjusting signal to the inverter; the inverter adjusts the output voltage of the fuel cell according to the adjusting signalso as to maximize the output power of the fuel cell; the power optimization module is used for acquiring the state parameters of the fuel cell, determining an output voltage corresponding to the maximum power of the fuel cell according to the state parameters, and controlling the PWM controller to send out an adjusting signal according to the determined output voltage, so that the output power ofthe fuel cell reaches the maximum under the control of the PWM controller. The inverter system can adjust the output voltage of the fuel cell, so that the output power is kept to be maximum in the power generation process of the fuel cell so as to maximize the power generation efficiency.

The invention relates to a solenoid-drive liquid metallic rheostat which is characterized by comprising a casing, paraffin, a copper wire, a communicating vessel, liquid metal and an electromagnetic pump. The casing is filled with the paraffin and the copper wire; the communicating vessel is located on one side of the casing and is connected with one end of the copper wire; the electromagnetic pump is mounted at the bottom of the communicating vessel; and the liquid metal is stored in the communicating vessel, moves up and down under the driving of the electromagnetic pump and is contacted with the copper wire at different height positions, so that the length of the copper wire placed in a circuit is hanged and the variable resistance effect is achieved. The solenoid-drive liquid metallic rheostat takes the copper wire as the main body, utilizes the electromagnetic pump to drive the liquid metal to move to adjust the copper wire resistance, and adopts the paraffin to absorb joule heat, so that the whole system is stable and reliable, small in size, light in weight and low in cost, and can be widely applied to the field of soft starting of motors.

An electronic control micro valve realized by shape memory alloy comprises a liquid inlet tube, a spacer layer, a sparge pipe, a shape memory alloy drive, a linkage piece, a valve ball and a bias pressure spring; wherein, the liquid inlet tube and the sparge pipe are connected by being respectively connected and fixed with the spacer layer; the valve ball is positioned in the sparge pipe and is over against a jet pipe; one side of the valve ball far away from the jet pipe is connected with the linkage piece; the other end of the linkage piece is connected with the shape memory alloy drive by passing through the spacer layer; the other end of the shape memory alloy drive is fixed at the top of the liquid inlet tube; one end of the bias pressure spring is against the spacer layer and the other end thereof is connected with the valve ball; under certain pressure state, the bias pressure spring presses the valve ball against the jet pipe to cause the jet pipe to close; the electric energycontrols the shape memory alloy drive to act to drive the valve ball to further open and close the valve. The micro valve has low manufacturing cost, small volume, light weight, simple structure and simple and convenient assembly and disassembly and is easily suitable for certain specific industry and agriculture and life automation requirements by improving structures.

The invention relates to a radiation type air conditioner indoor unit. The radiation type air conditioner indoor unit comprises a shell, a microchannel heat exchanger and an electronic control board. A containing space is defined in the shell. The microchannel heat exchanger is arranged in the containing space and provided with an upper manifold, a lower manifold and multiple heat transfer pipes located between the upper manifold and the lower manifold. Multiple microchannels communicating with the upper manifold and the lower manifold are arranged in each heat exchange pipe. The electronic control board is arranged on the lower portion of the containing space and is insulated from the microchannel heat exchanger. In this way, the electronic control board is not affected by radiant heat of the microchannel heat exchanger. The temperature difference between the surface temperature of the electronic control board and the temperature of the environment where the electronic control board is located is small, the working performance of the electronic control board is guaranteed, and condensation generated on the electronic control board is avoided as well, so that the air conditioner indoor unit has the high performance.

The control method and heat dissipation device for the heat dissipation device of the mobile device of the present invention, the present invention detects the temperature and environmental humidity of the backplane of the mobile device through the detection module, calculates the dew point temperature td according to the temperature and the environmental humidity through the control module, according to The control module controls the temperature of the cold end of the semiconductor refrigeration sheet of the heat dissipation device, thereby preventing condensation. The present invention preferably adopts metal foam as heat dissipation material, replaces common heat dissipation fan, realizes zero noise, and makes heat dissipation device more compact and miniaturized.