46results about How to "Optimize system design" patented technology

The gap indicator includes a surround sensor system for recording the traffic surround field including the traffic in at least one adjacent lane, an identification device for determining gaps in the traffic sufficient for a lane change, and a dialog device for the output of detailed driving instructions to the driver of the host motor vehicle.

A system and method for measuring the speed of a fan is presented. The duty cycle of a pulse width modulated (PWM) power signal may control speed of the fan. The fan may generate tachometer pulses used for monitoring RPM of the fan. Very low frequency test pulses may be generated and provided via a test signal multiplexed with the PWM signal to obtain tachometer pulses present even when the PWM signal is deasserted. The frequency of the test signal may be determined based on the duty cycle of the PWM signal and may be dynamically updated using frequency divider values stored in a user programmable look-up table. The tachometer pulses may be used to reset a flip-flop whose data input is held high and a down counter, which may be operated at a frequency slightly lower than the frequency of the test signal, with the output of the down counter clocking the flip-flop. The output of the flip-flop may provide recreated tachometer pulses to a pulse counter that counts the number of pulses within a determined period of time, providing a measured RPM of the fan.

A system and method for measuring the speed of a fan in an electrical system is presented. The duty cycle of a pulse width modulated (PWM) signal provided by a signal generator may control the speed of the fan. The fan may generate tachometer pulses that may be used by a tachometer reading-unit to monitor the RPM of the fan. Very low frequency test (VLFT) pulses may be generated and provided through a sampling signal multiplexed with the PWM signal to sample the fan generated tachometer pulses even when the PWM signal is low. The frequency of the sampling signal may be determined based on the duty cycle of the PWM signal and may be dynamically updated when the duty cycle of the PWM signal is updated. The sampling signal may be used as the clock input to a flip-flop with the tachometer pulses as the data input, and the output of the flip-flop providing an input to a pulse counter that counts the number of pulses within a determined period of time, providing as its output the measured RPM of the fan.

An optical transceiver includes N transmitters each transmitting one of N transmitted optically bound channels; a clock forwarding mechanism to transmit a transmitted optical clock signal to an opposing optical receiver; N receivers each receiving one of N received optically bound channels; and a clock recovery mechanism to receive a received optical clock signal from the opposing optical transmitter. A method and photonically integrated system are also disclosed. The optical transceiver, method, and system optimize system design of WDM highly parallelized transceivers with optical bound channels, a simplified clocking architecture, and boosted receiver sensitivity. The optical transceiver, method, and system include clock recovery followed by data recovery and can utilize integrate-and-dump optical receivers with a recovered clock.

A system and method for measuring the speed of a fan in an electrical system is presented. The duty cycle of a pulse width modulated (PWM) signal provided by a signal generator may control the speed of the fan. The fan may generate tachometer pulses that may be used by a tachometer reading-unit to monitor the RPM of the fan. Very low frequency test (VLFT) pulses may be generated and provided through a sampling signal multiplexed with the PWM signal to sample the fan generated tachometer pulses even when the PWM signal is low. The frequency of the sampling signal may be determined based on the duty cycle of the PWM signal and may be dynamically updated when the duty cycle of the PWM signal is updated. The sampling signal may be used as the clock input to a flip-flop with the tachometer pulses as the data input, and the output of the flip-flop providing an input to a pulse counter that counts the number of pulses within a determined period of time, providing as its output the measured RPM of the fan.

A control circuit is employed for controlling a wireless power receiving apparatus that receives an electric power signal from a wireless power transmission apparatus. An electric power detection unit detects the received electric power PRX received by the wireless power receiving apparatus. A control unit generates a control signal CE for controlling the electric power PTX to be transmitted by the wireless power transmission apparatus. When the received electric power PRX detected by the electric power detection unit falls despite the control signal CE not indicating an instruction to lower the electric power PTX to be transmitted, an abnormal state judgment unit judges that an abnormal state has occurred.

This invention concerns distributed turbo coding and relaying protocols in wireless relay networks. In particular, the invention concerns a method for relaying signals at a relay node, a method for processing signals at a destination node, a relay system and software to perform the methods. The wireless relay networks comprise a source node, a destination node and one or more relay nodes. At a relay node, the invention comprises the steps of receiving a signal from a first node; decoding the received signal; and if the received signal is decoded incorrectly, employing an Amplify-And-Forward (AAF) relaying protocol comprising the steps of amplifying the received signal and then transmitting the amplified signal to a second node; but otherwise, employing a Decode-And-Forward (DAF) relaying protocol comprising the steps of re-encoding the decoded signal and then transmitting the coded signal to the second node. At a destination node, data transmitted by the source node is recovered by combining all signals received from the source and relay nodes and then decoding the combined signal.

The invention discloses a coal economizer for a power station boiler. The coal economizer comprises a water supply pipeline (4), an inlet header (1), a heat transfer face (2), an outlet header (3) and an outlet pipeline (8), wherein flue gas flows outside the heat transfer face to heat up water, a first bypass duct (5) which is used for connecting the water supply pipeline (4) and the outlet pipeline (8) is arranged between the water supply pipeline (4) and the outlet pipeline (8), and a bypass temperature adjusting device (9) is arranged on the first bypass duct (5). According to a system of the coal economizer, the traditional system design is improved, and the coal economizer has a function of temperature adjustment at the same time when the coal economizer can reduce the temperature of the flue gas at an outlet of the boiler and increase the water supply temperature.

The invention discloses a garnet type current sensor and a manufacturing method of a garnet module. The sensor is formed by a light source, an input polarization maintaining optical fiber, an input optical collimator, a polarizer, the garnet module, an analyzer, an output optical collimator, an output polarization maintaining optical fiber and a detector in a connected mode. The garnet module is a core part of the sensor, and a bias film layer capable of solidifying an initial magnetization direction of a garnet material is coated on the garnet module. The garnet type current sensor uses the detector to directly detect changes of a Faraday rotation angle of incident light caused by current changes, and current parameters can be indirectly obtained. Garnet which is provided with high Verdet constant, high transmittance, low temperature coefficient and good mechanical and physical optic performance serves as a core sensing element, and the bias film layer is coated on the garnet to correct system light paths, so that sensitivity of the garnet type current sensor is substantially improved, and system errors are reduced.

The present application discloses a current equalizing busbar for a converter comprising: a direct current busbar connected to a DC terminal of the converter and positive terminals and negative terminals of respective power modules; and an alternate current busbar connected to AC terminals of the respective power modules and a load; wherein, when the converter operates, a sum of an inductance caused by the DC busbar between the DC terminal and a positive terminal or a negative terminal of a power module and an inductance caused by the AC busbar between the load and an AC terminal of the power module is equal to a sum of an inductance caused by the DC busbar between the DC terminal and positive terminals or negative terminals of other power modules and an inductance caused by the AC busbar between the load and AC terminals of said other power modules.

A positive counter starts counting, starting with an initial value, upon receiving a positive edge of a dimming pulse signal. A negative edge counter starts counting, starting with an initial value, upon receiving a negative edge of the dimming pulse signal. For each i-th (2≦i≦n) channel, the phase shift amount is calculated by multiplying a period count value that indicates the period of the dimming pulse signal by (i−1) / n. When the count value matches the phase shift amount, a burst control signal is switched to a first level. When the count value matches the phase shift amount, the burst control signal is switched to a second level.

In an optical transmission system, operations of certain elements are adjusted in an individualized manner after detecting a change in the total optical power level corresponding to multiple optical channels in a link of the system in order to control transients in those channels. For example, in response to a sudden drop in the number of channels resulting from a fiber cut, the power levels of the optical pumps in a Raman amplifier in an OADM are adjusted to reduce transient gain errors in the surviving channels, where the adjustment to the pump power level for each different optical pump is a function of both the detected change in the total optical power level and at least one specified coefficient for that particular optical pump, in order to handle non-linearities in the response of the Raman amplifier to the sudden drop in the number of optical channels.

A system and method for protecting register write operations, especially register write operations performed in a USB PHY. A USB transmitter / receiver, operable to receive a register write command from a USB LINK device, may monitor the write sequence initiated by the register write command to determine if / when the register write sequence has been interrupted. In monitoring the register write sequence, the USB transmitter / receiver is operable to discard the register write command if a DIR signal issued by the USB transmitter / receiver is asserted during the register write sequence and / or if an STP signal received by the USB transmitter / receiver is asserted during the register write sequence, where STP may be part of a normal register write operation. The USB transmitter / receiver is further operable to allow the register write sequence to complete if the STP signal and the DIR signal are not asserted during a predetermined period of the register write sequence. The monitoring functions may be implemented in a finite state machine comprised in the USB transmitter / receiver.

A system for selectively blocking electromagnetic energy. The system includes a first mechanism for employing a perforated component to pass a beam characterized by a first property and reject a beam characterized by a second property. A second mechanism selectively alters a beam passed by the first mechanism so that upon reflection, the beam exhibits the second property. In a specific embodiment, the first property corresponds to a first polarization, and the second property corresponds to a second polarization. In the specific embodiment, the perforated component includes a beamsplitter having a first perforated metallic plate. The second mechanism includes a quarter-wave plate having a second perforated metallic plate.

The invention relates to a long-distance sensing device combining an energy conversion sensor and an optical fiber. The long-distance sensing device comprises a sensing head, a host and a connection cable 5, wherein the sensing head comprises a current or voltage output energy conversion sensor 1 and an electricity and light conversion unit 2, the host comprises a photoelectric conversion unit 3 and a signal analysis and processing unit 4, and the connection cable 5 communicates the sensing head and the host. The energy conversion sensor 1 carries out corresponding current output when sensing changes of a physical quantity, and the output currents are used for driving the electricity and light conversion unit 2. Optical signals produced by the electricity and light conversion unit 2 are transmitted in a long distance through the connection cable 5 and then returned to be electric signals through the photoelectric conversion unit 3, signal analysis is carried out in the signal analysis and processing unit 4 and accordingly the measured physical quantity is analyzed. The long-distance sensing device is suitable for a large quantity of conventional energy conversion sensors so that the sensors can work in a long-distance environment without power supplies, has the advantages of being easy to install and high in adaptability, and brings great convenience for actual on-site installation and system design.

A channel-growth plan for an optical transmission system selects channels such that the transients that result in the channels that survive a network failure, such as an upstream fiber cut, are either minimized or effectively handled by some transient-control technique. In one embodiment, the growth plan may try to keep post-transient surviving channel total power gain equal to the pre-transient total power gain. Alternatively, the growth plan may try to distribute the surviving channels uniformly over the pre-transient channel-frequency range. Other manifestations are to keep (1) the average power of the surviving channels substantially equal to the average power of the pre-transient channels or (2) the average power of the post-transient surviving channels substantially equal to the power level of a specified channel. Transient-control can be balanced with conventional low-cost and high-performance goals to provide an effective hybrid channel-growth plan.