39 results about "Off response" patented technology

The invention relates to a valve for controlling the delivery of metal melt and a use method thereof, belonging to the field of non-ferrous metal processing. The valve body is externally provided with three interfaces, and an inflow interface at the left end is a melt inlet; the interface opposite to the inflow interface is a valve sleeve installation port, the valve rod stretches into the valve sleeve installation port, and a valve sleeve is fixedly installed in the position of the valve sleeve installation port; an outflow interface at the lower end perpendicular to the direction of the inflow interface is a melt outflow port; a heating device is arranged outside the valve body; a valve core is arranged in the valve body and connected with a valve rod through screw threads; the valve core is in a cylinder structure; the two ends of the cylinder are in a cone shape; a thermocouple installation hole is formed in the valve rod and the valve core; and the heating device is installed outside the valve body. The valve provided by the invention can realize the starting and stopping of the delivery of high-temperature metal melt, the on-off response speed of the valve is high, the control is simple and convenient, the structure in the valve can prevent the occurrence of the problem that the melt leaks from the valve because the valve is not completely closed, and the valve is connected with a melt delivery pipeline or melt processing equipment, thereby realizing the effective control for the delivery of the metal melt.

The invention discloses a circuit for eliminating impact sounds generated in switching process. The circuit comprises a power supply and an audio power amplifier. A switch voltage generation circuit is connected with the power supply, and the switch voltage generation circuit is connected with a turn-on response switch circuit and a turn-off response switch circuit; the switch voltage generation circuit provides a switch voltage signal to control the turn-on response switch circuit and the turn-off response switch circuit; and the output terminals of the turn-on response switch circuit and the turn-off response switch circuit are connected with the audio power amplifier so as to provide a silencing signal for the audio power amplifier during the turn-on and turn-off moment. The switch voltage generation circuit outputs a switch voltage signal U1 to control the turn-on response switch circuit and the turn-off response switch circuit, thus outputting effective silencing signal MUTE, andeliminating the impact sounds during the turn-on and turn-off process. The circuit can effectively and reliably eliminate the impact sounds of the audio equipment in the turn-on and turn-off process,has low cost, and is simple, reasonable, safe and reliable.

The invention discloses a power-on and off management method for portable equipment. The method comprises a power-on process and a power-off process. The power-on process comprises the following stepsthat: a power-on button emits a power-on signal; when a power supply control module receives the power-on signal, a power-on instruction is emitted to the host; when the host receives the power-on instruction, a power-on response is sent to the power supply control module, and the host is powered on; when the power supply control module receives the power-on response, a power-on state indicatorlight is controlled to flicker, a battery is connected, and meanwhile, whether the host finishes being powered on or not is monitored; and when a monitoring result shows that the host finishes being powered on, the power-on state indicator light is controlled to be normally on. The power-off process comprises the following steps that: a power-off button emits a power-off signal; when the power supply control module receives the power-off signal, a power-off instruction is sent to the host; when the host receives the power-off instruction, a power-off response is emitted to the power supply control module, and the host is powered off; when the power supply control module receives the power-off response, a power-off state indicator light is controlled to flicker, and whether the host finishes being powered off or not is monitored; and when a monitoring result shows that the host finishes being powered off, the power-off state indicator light is controlled to be off, and the battery is cut off.

An apparatus for shutting-off electrical appliances and electrical devices upon detection of an audible alarm issued by a separate fire alarm. The separate fire alarm device generates an audible warning upon detecting fire. The shutting off device make use of these ever improving ubiquitous fire alarms to greatly reduce the cost and complexity of providing a power shut-off response in the case of fire. The shut-off device includes a switch to interrupt electrical power to an appliance, the switch is activated by a microphone for detecting an audible alarm.

The invention relates to a liquid coupling reverse-cutting transmission case comprising a liquid coupling, wherein a fast on-off mechanism is arranged between a working cavity of the liquid coupling and an oil tank. The liquid coupling reverse-cutting transmission case has a fast on-off response function and can shorten response time to 6-10 seconds. An added speed regulation proportional regulation control valve can realize the functions, i.e. load start, overload protection, isolated torsional vibration, slow-down impact, stepless speed regulation and fast on-off response.

The invention discloses an IGBT and a producing method thereof. The IGBT comprises a plurality of P-type columns which divide a drift region into a plurality of units, first N-type layers between the P-type columns form a structure in which P-type thin layers and N-type thin layers are arranged alternately, so that an N-channel metal oxide semiconductor (NMOS) forming an IGBT device is in a super-junction MOS structure; as the super-junction MOS structure enables drift region of the device to be used up easily, the voltage endurance capacity of the drift region and the overall voltage endurance capacity of the device can be improved; and the dosage concentration of the drift region can be improved and the thickness of the drift region can be reduced due to improvement of the voltage endurance capacity of the drift region, so that the conducting resistance of the device can be reduced, the current density of the device can be increased, the on-state resistance and joule heat of the device can be reduced, and the turn-off response speed of the device can be improved.

The invention relates to a device for rapid assessment of a cook-off response degree of a solid propellant. The device comprises a fixing frame, the bottom of the fixing frame is provided with an explosion chamber, the middle of the explosion chamber is provided with a sample cell, an opening of the sample cell is sealed by a top column, and a pressure sensor is arranged on the top column and connected with a signal conditioner in connection with a data collector. The explosion chamber is externally wrapped by a heating sleeve which is connected with a temperature programming controller. The cook-off response degree can be quickly and quantitatively assessed under a condition of low sample consumption, and the device is simple in structure, low in cost and convenient and simple in operation.

The invention discloses a stable response method for power type lithium battery power-off protection. The method specifically includes: providing an O state aluminum material, and making a connectingsheet from the O state aluminum material, forming a center blind hole on the connecting sheet, and prefabricating a pull crack guide groove of certain shape for controlling the bottom rupture pull force and rupture position. The stable response method provided by the invention greatly improves the pressure relief uniformity of an anti-explosion disk, and the anti-explosion effect can be more stable and reliable. The power-off response pressure value can be realized by the material performance of the connecting sheet and the structure of the pull crack guide groove, and the response accuracy and stability performance are both improved significantly. The invention also discloses a cap structure. Compared with the prior art, the method and the structure provided by the invention solves the defect that in the past in order to ensure no heat emission of a connecting piece under large current, a welding part cannot disconnect timely to play a safety protection role. The structure constitutespower-off protection timely response of battery safety performance.

The invention discloses a high-voltage narrow pulse modulation circuit which comprises a modulation pulse shaping drive circuit,a MOSFET gate drive module, a switch gate drive circuit, a modulation switch tube, a discharging circuit, an energy storage circuit and a power device, the modulation pulse shaping drive circuit is connected with the MOSFET grid drive module, the MOSFET gate drive moduleis connected with the switch gate drive circuit, the energy storage circuit, the modulation switch tube, the discharge circuits are sequentially connected to form a closed loop; the MOSFET gate drivemodule is connected with the switch gate drive circuit; the modulation switch tube, the power devices sequentially. In the invention, the influence of wiring of the printed board on modulation signalwaveform distortion is reduced; the driving capability is improved, the quick response of the gate driving module is ensured, the gate of the modulation switch tube obtains higher instantaneous current, the on-off response time of the modulation switch tube is prolonged, the discharge time of a power device is shortened, and the ringing effect of drain modulation pulse signals is reduced by adopting reasonable energy storage circuit design and layout structure.

The invention relates to a liquid coupling transmission case capable of realizing fast on-off response and suitable for driving a sand pump of a dredge boat, the sand pump of the dredge boat comprises a liquid coupling and a shell, wherein the shell is fixedly connected with a driving wheel of the liquid coupling, is communicated with a working cavity of the liquid coupling through an oil hole and is internally provided with a fixed guide pipe; the opening of one end of the fixed guide pipe faces to the oil feeding direction of high-speed rotative working oil inside the shell, the fixed guide pipe is provided with a one-way valve, and the other end of the fixed guide pipe is communicated with an oil cooler; an oil outlet of the oil cooler is connected with an oil inlet of a proportional regulation control valve, an oil outlet of the proportional regulation control valve is communicated with an oil inlet of the working cavity of the liquid coupling, and the proportional regulation control valve is also provided with a bypass which is communicated with an oil tank. The added speed regulation proportional regulation control valve can realize the load start, the overload protection, the isolated torsional vibration, the slow-down impact, the fast on-off and the stepless speed regulating operation.

A high operating temperature split-off band infrared (SPIP) detector having a double and/or graded barrier on either side of the emitter is provided. The photodetector may include a first and second barrier and an emitter disposed between the first and second barriers so as to form a heterojunction at each interface between the emitter and the first and second barriers, respectively. The emitter may be of a first semiconductor material having a split-off response to optical signals, while one of the first or the second barriers may include a double barrier having a light-hole energy band level that is aligned with the split-off band energy level of the emitter. In addition, the remaining barrier may be graded.

The invention discloses a power-on reset circuit with long power-on reset time-delay and short power-off response time, and belongs to the technical field of integrated circuit design. The invention provides the new power-on reset circuit which is mainly formed by a power supply voltage detection circuit, a time-delay circuit and a few digital logic units. The circuit can realize long power-on reset time-delay and short power-off reset response time; meanwhile, in the power-off process, once the power supply voltage detection circuit generates a reset signal, the circuit is allowed to enter a reset locking state until the output of the time-delay circuit returns to a reset state, so that the circuit is guaranteed to still produce reset signals with enough delay time when the circuit is powered on again, and the problem that a conventional power-on reset circuit generates short pulse width reset signal burrs since the conventional power-on reset circuit is easy to be influenced by power supply fluctuation or the power-on again in the power-off process is solved.

The invention discloses a low-resistance check valve and relates to a check valve, in particular to improvement on a check valve structure in the prior art. The low-resistance check valve is quick inswitching-on and switching-off response and small in action resistance. The low-resistance check valve comprises a valve seat and a valve clack, wherein the valve clack is arranged on the valve seat.The valve clack resets through a reset mechanism arranged on the valve seat. A twisting force mechanism is arranged between the valve clack and the valve seat, wherein the twisting force mechanism isused for accelerating opening and closing of the valve clack. According to the low-resistance check valve, by means of the twisting force mechanism, the switching-off speed of the check valve is accelerated, and in other words, the check valve is higher in switching-off response speed. When water comes, the check valve is switched on; each transmission force arm passes through a rolling wheel arranged at one end, and the rolling wheels are driven to slide along the side wall through the water pressure; the switching-on resistance is reduced, and the resistance formed when the check valve is switched on is reduced; and the switching-on speed is higher, the switching-on time is shorter, and in other words, the response speed of the check valve is increased.

In a measuring method for determining values of viscosity coefficients of a liquid crystal by fitting Ericksen-Leslie theoretical values to measured response characteristics, in the first step, ON response characteristics of a liquid crystal cell 10 with homogeneous alignment are initially measured, and a value of a rotational viscosity coefficient γ₁ is determined from the measured ON response characteristics. Then, in the second step, OFF response characteristics are measured, and values of Miesovicz shear viscosity coefficients η₁ and η₂ are determined from the measured OFF response characteristics. In the calculation in the first step, the viscosity coefficients other than γ₁ are assigned general values. In the calculation in the second step, γ₁ is assigned the value determined in the first step.

Polymers that undergo a reversible phase change in response to being exposed to a light from a laser having a radiation pressure greater than a threshold level. The phase changeable polymers have the ability to reduce the intensity of the laser and can advantageously scatter laser light incident on the polymers. The on-off response of such polymers is in the microsecond range and the light scattering property is independent of laser wavelength. The polymers can beneficially be incorporated into devices to protect human vision and optical instruments that are vulnerable to lasers at high intensities. Methods for making and using such devices are also disclosed.

An apparatus for switch ON/OFF impulse detection includes an impulse detector and a microcontroller. The microcontroller is coupled in signal communication to the impulse detector. The impulse detector is operative to receive an impulse response from an antenna. The impulse detector is operative to provide one of a single alert signal and a plurality of alert signals for the microcontroller in response to the impulse response. The impulse response includes one of a single impulse waveform and a plurality of impulse waveforms. The impulse detector generates the single alert signal when the impulse response includes the single impulse waveform. The impulse detector generates the plurality of alert signals when the impulse response includes respective ones of the plurality of impulse waveforms. The microcontroller is operative to determine a nature of the impulse response. The nature is determined as a switch-ON response when the single alert signal is received. The nature is determined as a switch-OFF response when the plurality of alert signals are received.