43results about How to "Reduce size and cost" patented technology

To provide a power plant which is capable of reducing power passing through a distributing and combining device, thereby making it possible to attain reduction of the size and manufacturing costs of the power plant and enhance driving efficiency of the same. The power plant 1 for driving driven parts DW and DW includes a prime mover 3, a first distributing and combining device 20 having first, second and third elements 21, 24 and 22, a second distributing and combining device 30 having fourth, fifth and sixth elements 31, 34 and 32, and speed-changing devices 40, 50, 2, 61 and 62 which are connected to the third and sixth elements 22 and 32 and are capable of changing the relationship between the rotational speed of the third element and that of the sixth element 32. The second and fourth elements 24 and 31 are mechanically connected to an output shaft 3a of the prime mover 3, and the first and fifth elements 21 and 34 are mechanically connected to the driven parts DW and DW.

There are provided a downsized and low-cost optical module used as a terminal for wavelength multiplexing optical transmission and one-core bidirectional optical transmission which transmits lights of plural wavelengths through one optical fiber, and a method of manufacturing the optical module. A base on which plural optical elements are mounted, and an optical multiplexer and demultiplexer having wavelength selection filters and mirrors formed on both surfaces of a substrate are prepared. Those two parts are packed into a package so that an optical element mounted surface and a filter surface are substantially parallel to each other, and the optical elements are arranged to emit or receive lights obliquely to the base. With this configuration, because the optical multiplexer and demultiplexer can be mounted in parallel to an X-Y plane, a package can be easily machined by using a lathe, thereby enabling a reduction in the costs.

A tunable laser transmitter configured in a small package subassembly coupled to a printed circuit board. The tunable laser transmitter includes a housing with a volume formed by exterior walls. An electrical input interface is positioned at the first end of the housing. A first and a second optical output interface is positioned at the second end of the housing, the first output being configured to transmit a modulated optical beam, and the second output configured to transmit a cw beam to the local oscillator of an external receiver.

The invention relates to a guideboard recognition blind-guide device and method thereof belonging to the field of pattern recognition technique based on DSP. The device includes: an outside information acquisition module for collecting information ahead of visual field and switching the information into greyscale information and outputting the information onto the guideboard detection module; a guideboard detection module for storing and processing the image information collected from the outside information acquisition module, and obtaining the zone related to the guideboard information in the image by image processing method, processing the zone where the guideboard is located using the pattern recognition method, looking for digital audio signal corresponding to the character and outputting the signal to the sound switch module; a sound switch module for switching the digital audio signal into a analog audio signal. The earphone switches the analog audio signal into a sound signal, and outputs to blindman. The device provided by the invention uses DSP for finishing character recognition, ultimately tells blindman by hearing instead of vision effect, and is used for guiding and directing blindman when walking on road.

A transformer includes a magnetic component, a first winding group, a second winding group and a shielding component. The first winding group is windingly arranged on the magnetic component. The second winding group is windingly arranged on the first winding group. The shielding component is arranged between the first winding group and the second winding group.

A PWM generation circuit is set so as to generate a PWM pulse signal having a frequency that is an odd number times a vertical synchronization frequency. A frequency division circuit frequency-divides the PWM pulse signal generated by the PWM generation circuit. An AND gate calculates the logical product of the PWM pulse signal generated by the PWM generation circuit and a frequency-division pulse signal outputted from the frequency division circuit. An OR gate calculates the logical sum of the PWM pulse signal generated by the PWM generation circuit and the frequency-division pulse signal outputted from the frequency division circuit. A selector outputs an output signal of the OR gate as a dimming pulse signal in a case where the set duty ratio is not less than 50%, while outputting an output signal of the AND gate as a dimming pulse signal in a case where the set duty ratio is less than 50%. Consequently, the frequency of the dimming pulse signal is five-second the frequency of a vertical synchronizing signal.

The embodiment of the invention discloses a reading circuit of an uncooled infrared focal plane array. The reading circuit of the uncooled infrared focal plane array comprises a current bias circuit, a substrate temperature compensating circuit and an integrating circuit, wherein the current bias circuit comprises a reference bias current source structure IBIAS, a channel-level thermal short circuit microbolometer RB and a pixel-level thermal insulation microbolometer RS, wherein the channel-level thermal short circuit microbolometer RB and the pixel-level thermal insulation microbolometer RS are same in current bias; the substrate temperature compensating circuit comprises a transconductance amplifier OTA; the input end of the transconductance amplifier OTA is connected onto the channel-level thermal short circuit microbolometer RB and the pixel-level thermal insulation microbolometer RS to generate voltage; the input end of the integrating circuit is connected to the output end of the transconductance amplifier OTA, and the integrating circuit is used for performing integration on the output current of the transconductance amplifier OTA to obtain output voltage VOUT. According to the reading circuit disclosed by the embodiment of the invention, the channel-level transconductance amplifier is additionally arranged in the reading circuit, so that the substrate temperature compensation is realized; a TEC (thermo-electric cooler) is removed, so that the size and the cost of packaging are greatly reduced, and meanwhile, the uniformity and the reliability of the whole circuit are greatly improved.

A driver circuit includes a combined current and voltage control circuit for driving a light emitting diode (LED) load. The driver circuit includes an isolation transformer having primary, secondary, and auxiliary windings. A primary side circuit is coupled to the primary winding and includes a power factor controller and a switch. The power factor controller controls an output current to the LED load by controlling an operational state of the switch. A secondary side circuit is coupled to the secondary winding. The secondary side circuit includes a proportional and integration (PI) control portion which outputs a control signal. A combined voltage and current control circuit is coupled to the auxiliary winding and includes an optocoupler coupled to the power factor controller and to the PI control section. The combined voltage and current control circuit transmits a control signal from the PI control section to the power factor controller.

The application provides a power control circuit of a power amplifier, composed of a current control loop and a voltage control loop, wherein the voltage control loop forms an LDO (Low Dropout Regulator) circuit, requiring no large LDO, or large PMOS pipe for power supply, reducing dimension and cost, and not influencing the power of a power amplifier; the current control loop does not need an accurate Sense sampling resistor, thereby facilitating integration of chips. The power control circuit combines the voltage control technology and the current control technology; before an output circuit starts working and the current control loop is stable, the voltage control loop controls the output power of a power amplifier; then the voltage control loop and the current control loop control the output power of the power amplifier together; and when the current control loop is stable, the current control loop controls the output power of the power amplifier, thereby controlling the output power of the power amplifier from the work beginning of output current to work end.

The invention discloses a multi-level inverter. A five-level inverter comprises four capacitors and twelve switch tubes. Each switch tube is reversely connected with a diode in parallel. Compared with a five-level inverter in the prior art, clamping diodes and flying capacitors in the five-level inverter in the prior art are not included, the number of diodes and capacitors is decreased, the cost and size of the inverter are reduced, and the efficiency of the inverter is improved. Meanwhile, the five-level inverter can be extended into the multi-level inverter conveniently, and has better universality.

The invention discloses a logistics method for transporting LNG. The logistics method comprises the steps that S1, an LNG tank container transportation ship enters an LNG receiving station or a liquefaction plant dock; S2, multi-tank-container synchronous filling is conducted on LNG tank containers on the LNG tank container transportation ship; S3, the LNG tank container transportation ship filled with liquid leaves the LNG receiving station or the liquefaction plant dock and moves to the destination; and S4, after the LNG tank container transportation ship reaches the destination, the LNG tank containers are loaded and unloaded, and the transportation is completed. By the adoption of the logistics method, the cost is lowered by 66.7% compared with an existing logistics method, the transportation cost is lowered by 32.6%, the turnover cycle is shorter, and the utilization rate of the tank containers is better.

The present invention relates to circuits configured for implementation in sensors, sensors employing such circuits, and methods of operating and manufacturing such sensors and/or circuits. In at least some embodiments, the circuit includes a capacitor having a first input terminal and a first output terminal, a first amplifier having second and third input terminals and a second output terminal, and a second amplifier having fourth and fifth input terminals and a third output terminal. The first output terminal of the capacitor is coupled at least indirectly to the second input terminal, the fourth input terminal, and the third output terminal. Additionally, the second amplifier provides feedback current with respect to the capacitor depending upon signals provided to the fourth and fifth input terminals. The capacitor and each of the amplifiers can be implemented on an integrated circuit without any need for external components.

A fluid supply device, a printing device, and a method of cleaning a printing device are disclosed. A fluid supply device includes a main tank, a fluid chamber, a fluid-discharging head, a movable carriage, an expansion mechanism that expands the fluid chamber to draw fluid from the main tank, a suction mechanism, a remaining fluid detection unit, a comparison unit that compares the remaining fluid volume in the main tank with a specified value, and a setting unit that sets a cleaning mode. The expansion mechanism is actuated via a movement of the movable carriage. The setting unit sets a first cleaning mode in which a first amount of fluid is vacuumed from the nozzle or a second cleaning mode in which a second amount of fluid is vacuumed from the nozzle that is less than the first amount. The cleaning mode is selected in response to the amount of fluid remaining in the main tank.

The invention relates to a current balancing circuit with multi-path output, wherein a first flow equalizing element is used for carrying out flow equalization to two corresponding rectification circuits of a same auxiliary side winding, and a second flow equalizing element is used for carrying out flow equalization to current between different auxiliary side windings so as to realize output current balancing among multiple rectification circuits, and simultaneously, additional active devices and control are not needed. The current balancing circuit is applicable to the condition that an auxiliary side has multiple windings, and the current balance among multiple paths of output is realized by the characteristics of the flow equalizing elements. Even in application occasions with high power, low voltage resistant rectifying diodes and filter capacitors can meet the requirement, therefore, the conversion efficiency of the whole system is improved, volume and cost are saved due to the adoption of the filter capacitor with small capacity, and simultaneously, the circuit is simple in structure and easy to realize. The current balancing circuit is suitable for power supply occasions needing multiple equal current outputs and is especially applicable to LED (light-emitting diode) drivers with multiple paths of output.

A system for sensing imaging media along a transport path. System includes a light source positioned proximate to a selected location along transport path. A transducer in optical alignment with light source so as to receive light from light source after light crosses transport path provides an output signal having a frequency representative of the presence of imaging media at the selected location.

The invention provides a depth imaging mobile terminal and a mobile terminal-based human face identification application method. The depth imaging mobile terminal comprises a system-on-chip; the system-on-chip comprises a depth calculation engine used for executing depth calculation, a controller used for connecting and controlling a peripheral device, and a CPU connected with the depth calculation engine and the controller through a bus to realize overall management, wherein the peripheral device comprises a transmitting module and a receiving module; the transmitting module is used for transmitting structured light beam; the receiving module is used for receiving the structured light beam and generating a structured light image; and the depth calculation refers to calculation of a depthimage by utilizing the structured light image. In the depth imaging mobile terminal, the low-power and small-volume system-on-chip is adopted, and the low-power and small-volume depth calculation engine is integrated in the system-on-chip, so that the volume and cost of the whole chip can be reduced, the volume and cost of a whole machine are further reduced, and high efficiency of data calculation and transmission is ensured.

The invention discloses a double-column horizontally rotary type isolation switch testing device. The existing outdoor isolation switch testing platform is mainly reshaped on the basis of an original one, and the functions are single and do not have the continuously quantitative detection function. The invention adopts the following technical schemes. The double-column horizontally rotary type isolation switch testing device comprises a transmission mechanism, a power driving mechanism and a force load programmable simulation mechanism wherein the simulation mechanism includes a bearing base, a bearing installed on the bearing base, a transmission connecting rod, and a second driven flower disc at the upper part of the bearing base. The lower end of the second driven flower disc penetrates the bearing and is then equipped with an electromagnetic brake; the transmission connecting rod is provided with a force sensor; and one end of the transmission connecting rod is connected with the second driven flower disc while the other end is connected with the driving flower disc. When the testing device moves, it acquires the data of the sensor and quantitative research on the performance of the isolation switch is possible.

A wireless communications system includes: a first communications processing section for implementing a dedicated communications function that is only for the first wireless communications scheme; a second communications processing section for implementing a dedicated communications function that is only for the second wireless communications scheme; a shared transceiver section shared by the first communications processing section and the second communications processing section; a scheme selection section for selectively inputting a signal from the first communications processing section or a signal from the second communications processing section to the shared transceiver section; and a communications switching control section for indicating, to the scheme selection section, a scheme to be selected. The communications switching control section determines a switching timing based on frame and sub-frame information from the first communications processing section in an operation of switching from the first wireless communications scheme to the second wireless communications scheme or an operation of searching for a communications target station using the second wireless communications scheme.

A phase transfer cold storing material for air-conditioning is prepared from capric acid, lauric acid and tetradecane. Its preparing process includes heating capric acid and lauric acid separately to have them melted completely, forming comelted mixture of the two, heating the mixture to be melted completely and mixing with tetradecane to form the cold storing material of air-conditioning.

In a gaming table (1), image light L1 emitted from a display surface of a liquid crystal module (2) that carries out a dual image display arrives, directly through a window of a frame (4b), at a player in front of the gaming table. Image light L2 emitted from the display surface of the liquid crystal module (2) is reflected by a reflecting surface of a mirror member (3) so as to also arrive at the player through the window of the frame (4b). The player recognizes a first image formed from the image light L1 and a second image formed from the image light L2. Thus, the first and second images are supplied to the player as a background image on the gaming table (1). This makes it possible to realize a gaming machine having a display device that can display a large screen and can reduce the size and cost of the gaming machine.

The invention provides a satellite signal separating device and method. The satellite signal separating device comprises an antenna array and a processor, the antenna array comprises multiple array elements, and the processor adjusts the shape of a synthesis directional diagram of the array elements, forms directional gain in the coming direction of a satellite signal to be separated and forms attenuation in the incoming direction of other satellite signals, and thus, separates the satellite signal to be separated. The number of needed array elements is reduced greatly, and the size and cost of the antenna array are reduced greatly.

The invention provides an online replacement control device and method for a power module of a power electronic transformer system, and the device is characterized in that a first bypass switch is connected to an AC input end in parallel; a first auxiliary power supply is used for taking power from the DC side of the first AC/DC unit; a first control module is used for controlling the first bypassswitch to be switched on when the power module needs to be replaced, controlling the first bypass switch to be switched off after the power module is replaced and powered on again and sending a powertaking stopping instruction to the second control module; a second bypass switch is connected in series with the DC output end; a second auxiliary power supply is used for taking power from an external power supply; and a second control module is used for controlling the second bypass switch to be switched off when the power module needs to be replaced, controlling the second bypass switch to beswitched on after the power module is replaced, controlling the replaced power module to take electricity from the direct-current side of the second AC/DC unit to charge the direct-current bus capacitor, and controlling the replaced power module to stop taking power from the DC side of the second AC/DC unit according to the power taking stopping instruction.

The embodiment of the invention discloses a power supply device and a power supply system, which are used for reducing the size and cost of the power supply device. The power supply device comprises aswitching circuit which comprises a switcher, a first input end, a second input end and an output end. The first input end of the switching circuit is used for receiving a first voltage provided by afirst power supply. The second input end of the switching circuit is used for receiving a second voltage provided by a second power supply. The switcher is used for controlling the output end of theswitching circuit to be connected with the first input end or controlling the output end of the switching circuit to be connected with the second input end. The power supply device further comprises aconversion circuit which comprises an input end and an output end. The input end of the conversion circuit is connected with the output end of the switching circuit, and the output end of the conversion circuit is connected with electric equipment. The conversion circuit is used for receiving the first voltage or the second voltage, converting the received first voltage or the received second voltage into a third voltage and outputting the third voltage through the output end of the conversion circuit.

A hybrid energy storage device includes a positive pole formed by stacking a supercapacitor first electrode and a battery positive electrode, a negative pole formed by stacking a supercapacitor second electrode and a battery negative electrode, and a separator located between the positive pole and the negative pole. The supercapacitor second electrode, the battery negative electrode, the supercapacitor first electrode, the battery positive electrode, and the separator are planar structures. The supercapacitor first electrode, the supercapacitor second electrode, the battery positive electrode, the battery negative electrode, the separator and electrolyte are packaged in a shell.

The present invention discloses an auxiliary power supply with a bidirectional power supply, comprising a bidirectional isolating converter, a first non-isolating converter, a second non-isolating converter, a first combining selector and a second combining selector, wherein the first combining selector is respectively connected with a primary side pressure-wire, the bidirectional isolating converter and the first non-isolating converter; and the second combining selector is respectively connected with a secondary side pressure-wire, the bidirectional isolating converter and the second non-isolating converter. According to the embodiment of the present invention, when power supply of the primary side and the secondary side is abnormal, the auxiliary power supply still can supply power fora primary side auxiliary power supply and a secondary side auxiliary power supply normally with the only one bidirectional isolating converter, thereby reducing cost and size for the isolating, and raising efficiency of auxiliary power converting during normal power supply of the primary side and the secondary side.

The invention discloses a power electronic transformer system and a control method thereof. The system comprises an A phase interphase transformation module, a B phase interphase transformation moduleand a C phase interphase transformation module and is characterized in that each interphase transformation module comprises a plurality of power conversion modules, an output voltage command value Uout_ref and the actual output voltage Uout subtract Uout_ref/Iout to obtain a load R through a PI adjuster, and the DC bus voltage Udcn(t) of an H-bridge unit is divided by the load R to obtain the input current Iin, the Iin and the Udcn(t) are multiplied to obtain the power P(t), the calculated power P(t) is substituted into a formula to obtain the DAB resonance frequency fs(t). The system reducesDC bus side and output side capacitance, reduces volume and cost, and reduces the control difficulty at the same.

The invention discloses an on-load voltage regulation control circuit for roadway illumination control and a control method thereof. The on-load voltage regulation control circuit comprises a winding, an AC connecting end and a load. The AC connecting end is provided with an L end and an N end. The winding is provided with a secondary coil and a plurality of primary coils. The secondary coil N1 is provided with a tap A1 and a tap A2, the tap A1 is connected with the L end, and the two ends of the load are connected with the tap A2 and the N end respectively. Taps of the primary coils are respectively connected with the N end through an on-off control circuit. The on-off control circuit is a combinational circuit including a plurality of switches, the number of the connected primary coils and the series-parallel connection structure can be selected through the on-off control circuit, and thus the voltage regulating size and precision can be changed. According to the on-load voltage regulation control circuit, the four different operation working conditions of normal voltage, boosting, voltage reduction and parallel connection can be achieved, the size is greatly decreased, the cost is greatly lowered, the discontinuous power supply problem can be solved, and the power supply reliability is improved.

The invention discloses a transformer, which is applied to a grid-side main circuit of an industrial transmission system and connected with an AC bus. The transformer comprises at least two primary windings and at least two secondary windings corresponding to the primary windings, wherein the primary windings are in series connection, the secondary windings are mutually independent, and predetermined phase difference is reserved between two adjacent secondary windings. Because the primary windings are in series connection, the secondary windings are mutually independent, and the predetermined phase difference is reserved between two adjacent secondary windings. Secondary current harmonic of the transformer can be reduced when the transformer is connected with a grid-side converter containing a large number of high-power semiconductor devices. Furthermore, compared with a transformer with split windings, short-circuit impedance of the transformer provided by the invention is less than short-circuit impedance of the transformer with the split windings under a condition of the same primary short-circuit impedance, so that the size and the cost of the transformer can be reduced under the same capacity. In addition, the invention further discloses a grid-side main circuit comprising the transformer of the industrial transmission system and a control method.

A PMSM sensorless vector control system and method is provided. The system includes a Clark transform module, a Park transform module, a Park inverse transform module, a pulse width modulation module,an inverter module, a sliding mode observer, a first comparator, a second comparator, a third comparator, a speed regulator and a current regulator. A sliding mode observer is used to replace a traditional mechanical sensor to detect the position and speed of a PMSM, the cost and size of PMSM control system are reduced, A new type of second-order sliding mode observer is designed by using Lyapunov function method. The second-order sliding mode observer eliminates the chattering of the system without low-pass filter, and obtains smooth back electromotive force signal for rotor position and speed estimation, which improves the observation accuracy and system robustness.

The invention provides a method and a system for electric power data collection based on a logarithm amplifier. The method comprises obtaining a voltage signal or a current signal of a measured line,and performing compression on the obtained signal based on the logarithm amplifier; performing digital processing on the compressed analog signal to obtain a digital signal; and performing expansion on the digital signal, and restoring the obtained signal. According to the method and the system for electric power data collection based on the logarithm amplifier, the dynamic range of the detected signal can be expanded to be more than 40 dB, and for an input system with 16 bits A/D, the dynamic range of the signal can be expanded to be more than 120 dB; the number of channels is reduced; the system structure can be simplified; and transmission capacity and storage capacity are reduced.