39results about How to "Control shutdown" patented technology

The invention discloses an intelligent control method and device for an air conditioner. The intelligent control method comprises the steps that whether prearranged matched Bluetooth devices exist in the surrounding environment or not is detected through an a Bluetooth module of the air conditioner, the number of the matched Bluetooth devices exist in the surrounding environment is obtained, and the temperature of the surrounding environment is detected by means of a temperature detection module; under the conditions that the matched Bluetooth devices exist in the surrounding environment and the temperature of the surrounding environment is within a preset starting temperature range, the air conditioner is controlled to be started, and the operating mode corresponding to the temperature of the surrounding environment and a default objective set temperature are selected; the default objective set temperature is corrected according to the number of the matched Bluetooth devices exist in the surrounding environment and the operating mode so as to be taken as the actual objective set temperature, and the air conditioner is controlled to operate in the operating mode at the actual objective set temperature. By the adoption of the intelligent control method and device for the air conditioner, the intelligentization of control over the air conditioner can be improved, and the comfort and the energy saving performance are improved when the air conditioner is used.

The invention discloses a light emitting diode (LED) drive circuit controlled by a parallel connection high voltage metal oxide semiconductor (MOS) tube and mainly solves the problem that existing drive circuits can not integrate effects of low costs and high efficiency and power factors. The LED drive circuit comprises a rectifier bridge, a control circuit, N strings of loads, N high voltage MOS tubes and N voltage reference circuits, the rectifier bridge is used for performing full-wave rectification for an alternating current signal, the N strings of loads are in a series connection in a single group mode and are in a bridge joint between the rectifier bridge and a drain electrode of the Nth high voltage MOS tube, common ends of two adjacent strings of loads are connected to drain electrodes of corresponding high voltage MOS tubes respectively, grid electrodes of the N high voltage MOS tubes are connected with the N voltage reference circuits respectively, source electrodes of the N high voltage MOS tubes are connected and connected to the control circuit, the control circuit detects current of the loads to adjust the voltage of the source electrodes of the high voltage MOS tubes so as to control the working states of the high voltage MOS tubes, and thereby the loads of an access circuit can be adjusted. The LED drive circuit controlled by parallel connection high voltage MOS tube has the advantages that peripheral devices are few, the service life is long, the efficiency and power factor are high, and the LED drive circuit can be directly integrated on a lamp panel carried with LED strings.

The invention discloses an LED backlight driving circuit, a driving method of the LED backlight driving circuit and a liquid crystal display device. The LED backlight driving circuit comprises an LED light bar and a power module driving the LED light bar. The output ends of the LED light bar are coupled to a short circuit protection module and a divider resistor respectively. The short circuit protection module comprises a comparison unit and a driving unit coupled to the comparison unit. The voltages at the two ends of the divider resistor are used as feedback voltages coupled to the comparison unit. The comparison unit is also coupled to a preset first reference voltage. When the value, by which the feedback voltages exceed the first reference voltage, is greater than a preset deviation value, the driving unit controls the power module to be switched off; when the first reference voltage is greater than or equal to the maximum brightness of the LED light bar in a normal state, the voltages at the two ends of the divider resistor are divided. The LED backlight driving circuit, the driving method of the LED backlight driving circuit and the liquid crystal display device have a short circuit protection function when an LED lamp bead is in a short circuit.

The invention discloses an air conditioner without stopping defrosting and a control method of the air conditioner. The air conditioner comprises an indoor unit and an outdoor unit, wherein the indoorunit comprises an indoor heat exchanger; the outdoor unit comprises a compressor, a four-way reversing valve and a plurality of groups of outdoor heat exchange systems; and each group of outdoor heatexchange systems comprises a throttling mechanism, an outdoor heat exchanger and a three-way valve, and the throttling mechanism, the outdoor heat exchanger and the three-way valve are sequentially connected. When the outdoor heat exchanger needs to be defrosted in the heating operation process of the air conditioner, one group of outdoor heat exchange system can be controlled to be in a defrosting state, and other groups of outdoor heat exchange systems are in a heating state so as to ensure that the indoor heat exchanger can still perform heating operation in the outdoor heat exchanger defrosting process and to guarantee the thermal comfort of an air conditioner using space.

The invention discloses a method for improving the efficiency of a power electronic transformer by using a zero-crossing detection technology, and belongs to the technical field of power electronic transformer control. According to the technical scheme, an AD zero-crossing detection circuit (7) is used for monitoring a resonance current zero point (9) in real time; a resonance frequency is calculated through calculation of a DSP (8); a switching frequency is adjusted according to the calculation result; and IGBTs (13, 14, 15, 16, 17, 18, 19 and 20) are controlled to be turned off at the momentwhen the current is zero, so that the turn-off loss of the IGBTs (13, 14, 15, 16, 17, 18, 19 and 20) is reduced. The method is applied to the aspect of isolation stage DC-DC topology of a power electronic transformer, can reduce the system loss, is simple in control scheme, and improves the energy conversion efficiency.

The invention relates to a multi-axis non-proportional fatigue test system based on centrifugal loading. The multi-axis non-proportional fatigue test system comprises a load sensor, a centrifugal multi-axis non-proportional loading part and a fatigue sample, wherein the centrifugal multi-axis non-proportional loading part comprises a rotating loading cross bar, a loading support and a clamp component; the rotating loading cross bar is arranged on the loading support through a bearing; a left eccentric mechanism and a right eccentric mechanism are respectively fixed at the two ends of the rotating loading cross bar; the loading support is located between the left eccentric mechanism and the right eccentric mechanism; the clamp component comprises an upper clamp and a lower clamp; the loading support is fixed to the upper clamp and is used for driving the upper clamp to apply a multi-axis non-proportional fatigue load to the fatigue sample when the rotating loading cross bar is rotated.The device is used for applying the multi-axis non-proportional fatigue load in the manner of centrifugal force, can overcome the defect of difficulty in applying the combined loads, such as, non-proportional tensile pulling-bending and bending-torsion of the present multi-axis non-proportional fatigue test system and supplies an effective test method for researching the material fatigue performance under a complex loading condition.

The invention provides an alarm processing method and device and a terminal. The method comprises the steps that the water inflow state of the terminal is detected; whether the detected water inflow state of the terminal reaches an alarm state indicating that the terminal is in the water inflow state is judged; and under the condition that the judgment result is yes, water inflow alarm processingis executed. Through the alarm processing method and device and the terminal, the problem that in the prior art, through a terminal water prevention method, the weight and cost of the terminal will beincreased is solved, and therefore the effect of giving a timely alarm to terminal water inflow is achieved.

The invention relates to a battery management system (BMS) pre-charging circuit and a control method thereof. The BMS pre-charging circuit includes an AFE front end detection unit, an MCU controller, a short circuit detection unit, a detection resistor, a pre-charging resistor, a pre-charging MOS tube, and a main power MOS tube, and the corresponding control method includes the following steps that S1, a charging current is sampled; S2, the AFE front end detection unit judges whether a sampled charging current value is greater than or equal to a preset overcurrent threshold or not, if yes, the step S3 is performed, otherwise, the step S1 is returned; S3, overcurrent protection is performed; S4, the pre-charging process is performed; and S5, normal power on is recovered. Compared with the prior art, without changing an original connection mode, that is, an external ignition signal is not input, the BMS pre-charging circuit can effectively solve the problem that a power part cannot be powered on normally due to overcurrent protection in the moment of power on.

The invention discloses an MOS tube-based smart home power utilization control system which includes a monitoring terminal and a household power distribution terminal connected with the monitoring terminal. The household power distribution terminal includes an AC/DC switching circuit, a high-frequency transformer, a charging control circuit, a storage battery, a discharging control circuit, a current detection module, a voltage detection module, an intelligent controller and a security module. The intelligent controller includes a power parameter acquisition and conditioning module, a CPU control module, a display module, a communication module, an alarm module, a clock module, a memory module, a keyboard input module, a switch circuit module, a reset circuit module and a power source drive control module. An MOS tube is adopted as a power device, and the power supply efficiency is high; during charging of a device battery, power supply of the battery can be cut off, and a power sourcesupplies power to a device instead, to protect the battery and prolong the service life of the battery. Startup and shutdown of the device can be controlled through hardware and software, and reset can also be performed through a hardware reset port, to make the device shut down.

The invention provides a novel FPGA structure of a power gating technology based on anti-fuse device control. Through the design of power gating, the objects of improving the chip yield, reducing the manufacturing cost of an FPGA chip and reducing the static power consumption of the FPGA are achieved. The on and off of a power switch device in the power gating technology are controlled by adopting an anti-fuse circuit. The control circuit has the advantages that the power-on and power-off sequence is controllable, and the yield of chips is improved.

The invention discloses a mains-supply home electricity consumption control system with a combined-sealing triode. The mains-supply home electricity consumption control system comprises a monitoring terminal and a home power distribution terminal connected with the monitoring terminal. The home power distribution terminal comprises an AC/DC (alternating current/direct current) conversion circuit,a high-frequency transformer, a charging control circuit, a storage battery, a discharging control circuit, a current detection module, a voltage detection module, an intelligent controller and a security and protection module. The mains-supply home electricity consumption control system has the advantages of multiple protection, measurement accuracy, high reliability, practicability, high intellectualization, low cost and the like, home electricity consumption cost can be reduced effectively, and effective energy conservation of home electric appliances is benefited; external starting circuits are omitted due to an AC-DC conversion device, and power consumption of the starting portion is reduced greatly; the combined-sealing triode is used for starting, so that stand-by power consumptionis low, and speed is high; the combined-sealing technology is adopted, so that a high pressure process is not need, easiness in implementation is achieved, and cost is saved; in case of output short circuit, the system enters a fixed frequency mode automatically, and stability is improved.

The invention discloses a light supplementing lamp device suitable for a portable terminal and provided with an adjusting knob switch. The device structurally comprises LED lamp tubes, a PCB, a power terminal base and a cable. The LED lamp tubes are arranged on the PCB and connected to the power terminal base through the cable. The PCB is provided with lamp panel fixing holes. When used, the light supplementing lamp device is embedded into portable self-service terminal equipment. The light supplementing lamp device is applied to the portable self-service terminal equipment, the method that light supplementing is carried out through equipment and a light source is replaced, and the equipment distributing space is saved; in addition, due to the characteristic of the small size, the structural layout is facilitated, cost is low, applicability is high, and the integration level and the attractiveness of the device are improved; and due to a manual adjustment knob, luminance can be continuously adjusted, and a light supplementing lamp can be controlled to be switched off.

The invention relates to an oral cavity anesthesia injection device. The oral cavity anesthesia injection device comprises a shell, a push cylinder, a motor and a main control chip; the process that the main control chip controls the working state of the motor is that a trigger signal collected by a trigger signal acquisition assembly is received; when the trigger signal is received, a forward rotation control signal is sent out, and the forward rotation control signal is used for driving the motor to rotate forwards; and when the received trigger signal is interrupted, a reverse rotation control signal is sent out, and the reverse rotation control signal is used for driving the motor to rotate reversely. The trigger signal acquisition assembly is arranged on the shell, a trigger signal input by a user is acquired through the trigger signal acquisition assembly, when the trigger signal is received, the main control chip sends out the forward rotation control signal to drive the motor to rotate forward, and when the received trigger signal is interrupted, the main control chip sends out the reverse rotation control signal to drive the motor to rotate reversely. A doctor can control the whole injection process only by lifting a finger, unnecessary movement of the needle in the injection process is reduced to the maximum extent, and the position of the needle is convenient to verify.

The invention provides a PFC circuit and a control method thereof. The PFC circuit comprises a Boost inductor, an auxiliary winding, an auxiliary switching tube, a main switching tube, a clamping capacitor, a series resistor, and a control module. The Boost inductor is in mutual inductance with the auxiliary winding, the first end of the auxiliary winding is connected with the first end of the auxiliary switch tube, the second end of the auxiliary switch tube is connected with the first end of the clamping capacitor, the second end of the clamping capacitor is connected with the first end of the series resistor, the second end of the series resistor is connected with the second end of the auxiliary switch tube, and the second end of the series resistor is connected with the second end of the auxiliary winding; the main switch tube is connected between the Boost inductor and the ground; and the control module is respectively connected with the control end of the main switch tube and the control end of the auxiliary switch tube.

The invention provides a human body detection method and device and a household appliance shutdown method and device, and relates to the field of wireless sensing. The method comprises the following steps: sampling channel state information (CSI) of each subcarrier of Wi-Fi communication in a target environment where a first household appliance is located for multiple times; generating a CSI amplitude time sequence matrix based on the sampled CSI, wherein each behavior in the CSI amplitude time sequence matrix is a CSI amplitude value of each subcarrier collected at the same sampling moment; obtaining a mean variance of the CSI amplitude time sequence matrix; performing human body detection on the target environment according to the mean variance of the plurality of CSI amplitude time sequence matrixes which are continuous in time; and in response to the detection that no person is in the target environment, controlling the first household appliance to be turned off. The method can detect whether there is a person in the target environment in real time, does not need to add special detection hardware, does not need to train in advance or carry out offline calibration, is low in complexity, is wide in detection range, can control the household appliances to be turned off under the condition of no person detection, and saves resources.

The invention provides an active quenching and resetting circuit, and the circuit is characterized in that the circuit comprises a single photon avalanche diode which is used for receiving an optical signal and generating an avalanche current; the initialization module is used for initializing the single photon avalanche diode; the reset module is used for resetting the single photon avalanche diode; the clamping module is used for clamping the single photon avalanche diode; and the threshold value detection unit is used for detecting the cathode voltage of the single photon avalanche diode, feeding back a detected signal to the reset module and controlling the starting of the reset module. The SPAD has the beneficial effects that the SPAD can be rapidly quenched and reset by setting the threshold detection unit and adjusting the reset time of the reset module, and when the threshold detection module detects that the voltage is reduced below the threshold, the reset module is controlled to reset, so that quenching and reset can be adaptively adjusted.