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321results about How to "Input stable" patented technology

Shifting register and driving method thereof as well as grid electrode driving circuit and display device

The invention discloses a shifting register and a driving method thereof as well as a grid electrode driving circuit and a display device, relating to the field of display. A needed electrical level can be stably output and bad phenomena caused by the fact that the output is not stable when a clock signal is converted and an output signal is interfered are eliminated, so that the display quality is guaranteed. According to the shifting register, an input module is used for sending an input signal to an output module, a resetting module and a maintaining module according to an input signal and a first clock signal; the resetting module is connected with the input module and a signal output end and is used for resetting a signal output end according to the first clock signal, first and second electrical level signals and the input signal; the maintaining module is connected with the input module and the output module and is used for sending a maintaining signal to the output module according to the input signal, the second clock signal and the second electrical level signal; and the output module is connected with the input module, the maintaining module and the signal output end and is used for sending the output signal to the signal output end according to the input signal, the maintaining signal and the second clock signal.
Owner:BOE TECH GRP CO LTD +1

Piston temperature field simulation test device and test method

The invention provides a piston temperature field simulation test device. The device comprises cooling equipment, a thermocouple temperature acquiring machine, a piston, an induction heater and high-frequency induction heating equipment; the induction heater can heat the head part of the piston, meanwhile, the piston is fixed into the cooling equipment, the cooling equipment is provided with a plurality of air cavities which are used for cooling the areas with the piston feature points, the cooling capability of the cooling equipment can be controlled by adjusting an electric air volume adjusting valve, and accordingly a needed piston temperature field module is obtained. The top face of the piston and the induction heater are maintained at the optimal induction heating distance through transverse and longitudinal movement of the cooling equipment, and maximum heat current input is ensured. Corresponding temperature measuring points are arranged in the piston feature areas, and temperature acquiring information is monitored by the thermocouple temperature acquiring machine. The test method adopts a thermocouple method to test the temperature field of the piston. The piston temperature field simulation test device and the test method have the advantages that the heat current is input stably, the position of the piston is adjusted, the heat current distribution module of the piston can be precisely simulated, and multi-point measuring can be achieved.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY

Glass heating kettle with far infrared heating film

A glass heating kettle with a far infrared heating film comprises a glass kettle body and a control base, a heating layer is arranged on the bottom of the glass kettle body, and a control circuit board is arranged in the control base. The glass kettle body is formed and is made of high borosilicate glass, a resistor heating layer is arranged on the bottom of the glass kettle body through the silk-screen technology that electrothermal film pulp is printed on the bottom of the glass kettle body, and two electrode layers are coated on the surface of the heating layer and are used as conductors. The control circuit board comprises a circuit control module, a PWM direct-current output module and a detection control module. According to the glass heating kettle with the far infrared heating film, a PWM direct-current control circuit is adopted, and the power input of a glass heating part is guaranteed to be stable in heating operation. The output power of the circuit control part is output in a slowly rising and stepped manner within a certain time at the beginning, a relay is used as a switching element, and an electric supply is rectified, and then a direct-current power supply isseparated from a load interface completely. The glass heating kettle with the far infrared heating film solves the problem that electricity is leaked caused by the fact that heated liquid is leaked from partial breaks of the glass kettle heating body when the glass kettle is powered directly. The glass heating kettle with the far infrared heating film solves the problem of the potential safety hazards when the existing glass kettles are used.
Owner:ZHONGSHAN XINJIYUAN ELECTRICAL APPLIANCE

Charging and discharging control device and control method for energy storage super-capacitor of electric workover rig

The invention relates to a charging and discharging control device for an energy storage super-capacitor of an electric workover rig. A bidirectional DC/DC converter of the device is a non-isolation type DC/DC converter; a bidirectional DC/DC converter main circuit control device is arranged on a main circuit of the bidirectional DC/DC converter, and is connected with the main circuit of the bidirectional DC/DC converter; by control over on and off of the bidirectional DC/DC converter main circuit control device, out-of-control overcurrent of the main circuit of the bidirectional DC/DC converter is avoided. In actual application, the main circuit of the bidirectional DC/DC converter and the main circuit control device can meet the power requirement of the electric workover rig in a way of parallel connection of n circuits; according to the charging and discharging control device for the energy storage super-capacitor of the electric workover rig and the control method, uncontrollable factors and risk of damage of charging current of the super-capacitor to the bus side can be avoided, and safe and reliable operation of an electric control system of the electric workover rig can be guaranteed.
Owner:CHINA UNIV OF PETROLEUM (BEIJING)

Built-in-external antenna signal input automatic-switching global position system (GPS)/personal digital assistant (PDA) dual-frequency handset

The invention discloses a built-in-external antenna signal input automatic-switching global position system (GPS)/personal digital assistant (PDA) dual-frequency handset, which comprises a handset body, a GPS processing chip module and a GPS receiving module, wherein the GPS receiving module comprises a GPS receiving antenna and a GPS receiver; the GPS receiving antenna comprises a built-in antenna and an external antenna; the GPS receiver comprises a built-in-external antenna signal switching module; the built-in antenna and the external antenna receive GPS radio frequency signals at a target measuring point respectively, and transmit the received GPS radio frequency signals to the built-in-external antenna signal switching module respectively; and the built-in-external antenna signal switching module automatically selects input signals input into a GPS processing chip (a processing chip on GPS-original electrical manufacture (OEM) board) module according to the signal intensity of the GPS radio frequency signals fed back by the built-in antenna and the external antenna. Therefore, the handset solves the problem of switching between the built-in antenna and the external antenna, and also can be used to work when the signals are relatively weaker or the requirement on measurement accuracy is relatively higher.
Owner:SOUTHEAST UNIV

Linear alternating current-direct current (AC-DC) converter for alternating chopped wave

The invention relates to a linear alternating current-direct current (AC-DC) converter for an alternating chopped wave, a high-frequency conversion circuit and an impedance conversion circuit in the technical field of electrical and electronic engineering. An output end of the high-frequency conversion circuit is connected with an input end of the impedance conversion circuit. The high-frequency conversion circuit comprises a first filter circuit, an alternating chopping circuit, a high-frequency transformer and a second filter circuit, which are in cascade connection sequentially. The impedance conversion circuit comprises a rectifying bridge and a boosting circuit which is in cascade connection with the rectifying bridge; the midpoints of two bridge arms of the rectifying bridge are respectively connected with two alternating current output ends of the high-frequency conversion circuit; and an output end of the boosting circuit outputs a direct-current voltage. The linear alternating current-direct current (AC-DC) converter outputs a stable direct-current voltage and generates a unit input power factor at the same time, achieves a flexible voltage-regulating capability, obtains a linear input impedance, overcomes the defect that a power supply fluctuation and a load fluctuation interfere with each other, has the characteristics of novel design, strong generality and the like and has the advantages of simple structure and low cost.
Owner:SHANGHAI JIAO TONG UNIV

Purifying sterilizing device for central air conditioner

A kind of disinfection installment used in centre air conditioning which belongs to air disinfection technology area and it is used to resolve the defection of the present installment of isolating drastically. In the installment there is setting the chlorite and activator delivery material pipes, a metering pump, a reacting pot and a gasify installment matching with the metering pump. After improved it increases a blowing off equipment which is consisted of a blowing off tank and a gas pump and the blowing tank is above of the inlet duct of gas equipment and in the tank there is a blowing off plate and on the plate surface layout the blowing holes densely also has the baffle boards distributing in dislocation and the reverse sump runner. The fluid inlet and the air outlet of the plate's up-down section are connected to the reacting tower and the gas pump individually. After extension the equipment it can make the activity chlorine dioxide liquor formed a thinner reverse fluidized led above the blowing off plate and it can make the chlorine dioxide divorced all from the liquor by undergoing the air blowing off from the blowing off hole on the surface of plate so it cancels the defection of the present installment of isolating drastically and the high density residual liquid chlorine dioxide.
Owner:HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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