31results about How to "Reduce false starts" patented technology

The invention provides a bedside table. The bedside table comprises a table body, a table door, a controller and a control panel, wherein the table door is installed on the table body in a pivoted mode, the controller is arranged in the table body, and the control panel is arranged on the table body, located on the table door and connected with the controller. The bedside table is simple in structure.

The invention relates to the technical field of engines, in particular to a control method and a control device for starting an engine. The invention aims to solve the technical problem that the engine starts by mistake due to an interference signal before it starts automatically. For this purpose, the present invention provides a control method for starting an engine. The control method for starting an engine includes the steps of: obtaining the current state of the engine; obtaining a rotational speed signal of the engine according to the current state in which the engine is combined with the starter; controlling the rotational speed signal Perform filtering processing to filter out the speed signal with signal jump in the speed signal; according to the matching of the filtered speed signal and the automatic starting speed signal, control the engine and the starter to go off-line and enter the autonomous running state. The invention performs effective filter processing on the large abnormal jump of the instantaneous rotational speed before the engine starts autonomously, so as to reduce the phenomenon that the engine starts incorrectly due to the disturbance of the rotational speed fluctuation before the engine autonomously starts.

The invention belongs to the technical field of water heaters, and discloses a water heater control method and the water heater. The water heater control method includes: dividing a day into a plurality of set time periods, and the water heater is provided with two preset states of an active state and an inactive state. Each setting period corresponds to a preset state; when water is taken during the set period set as the start state, the water heater is controlled to start; when water is taken within the set period set as the non-start state, the water heater is controlled not to start , the preset state corresponding to each set time period is updated according to the user's water usage habits, and the water heater uses the above water heater control method. In the present invention, the preset states corresponding to each set period are updated according to the user's water habits, so that whether the water heater is started or not can be automatically adapted to the user's water operation, without manual setting by the user, which is faster and more convenient.

Provided is a wireless vibrating pager for sending a call signal. The wireless vibrating pager comprises: a body part which includes a built-in switch, a resistance (R15) applying power to a control unit if the switch is off and connecting a power source and the switch, a resistance (R16) connected between the switch and the resistance (R15), and a power connection unit including a MOSFET connected to the resistance (R16) and connecting the power source and the control unit; and a clip part which includes tongs performing a clip function as seesawing, and a switch operating unit composed of amagnet or an operating protrusion, wherein the magnet is provided inside a portion adjacent to the body part, and the operating protrusion is provided on a lateral surface of the clip part.

The invention relates to an autonomously powered water pump, comprising a base and a housing, a motor is provided on the top plate, a solar charging device is provided on the bottom plate, a sealing cover for sealing the water inlet is provided on the housing, a sensor is provided on the sealing cover, and the housing There is a sealing plug on the body, a connecting groove is arranged on the solar charging component, and a control component is arranged between the connecting groove and the sealing plug; the advantage of the present invention is that the trigger is triggered when the sensor installed on the sealing cover detects that the water inlet is installed with a water inlet pipe. The solar charging device is pushed out from the bottom plate. At this time, the solar charging device receives solar energy and starts to charge. When the outlet pipe is installed, the operator only needs to connect the sealing plug with the connection groove, so that the pins and the switch are in contact to trigger the solar charging device. Through, so as to realize the independent power supply of the motor, ensure the normal operation of the motor, prevent the false start of the motor during the installation process, and also avoid the low voltage of the solar charging device to supply power to the motor at the beginning of charging, and improve the overall service life.

Disclosed is a single-ended electrical quantity-based fast full-circuit protection method using a choke to construct a circuit boundary. In the method, a circuit boundary is constructed by installing a choke on a circuit according to topology types of various power supply systems, and then protection determination data is constructed from differences in electrical quantity differences of a circuit region under protection or during an internal or an external failure, thereby realizing fast full-circuit protection based on single-ended electrical quantities. The present invention adopts a choke to construct a boundary of a circuit, and then achieves single-ended quantity-based fast full-circuit protection for a circuit having no boundary elements. The method of the present invention effectively overcomes the problem of poor protection sensitivity of operational frequency quantities in an alternating current circuit containing multiple inverters, and also meets a requirement of fast protection operations for direct current circuits. The invention does not require additional protection when applied to a power distribution network, so as to achieve fast determination of an internal or external failure of a protection region simply by using single-ended electrical quantities, thereby effectively solving the relay protection problem of a power grid containing multiple inverters.

The present invention discloses a control method and a control system for a scraper coal feeder. The method comprises the steps of: a current transformer mounted on a power supply of the motor of the scraper coal feeder switches a power supply current and outputs a secondary current to a current transmitter; the current transmitter outputs a 4-20mA current signal to a DCS system after receiving the secondary current; and if the current signal received by the DCS system is less than 12mA, an instruction of automatically starting a vibrator is issued. The method and the system may make a pre-judgment before the coal in the scraper coal feeder is about to be cut off, and issues an order of starting the rapper.

The invention discloses a traveling wave integrated distance measuring method combining an impedance method with a traveling wave method, for oscilloscope determination through monitoring power frequency voltages and power frequency currents of a power transmission line. A power frequency oscilloscope file and a high-frequency oscilloscope file are generated in case of a fault in the power transmission line; by use of the impedance method, a fault line is obtained through determining a starting phase in the power frequency oscilloscope file, and an impedance distance measuring length is obtained through performing impedance analysis and calculation on power frequency voltage and power frequency current data; and by use of the travelling wave method, a travelling wave distance measuring length is obtained through performing travelling method distance measurement on high-frequency current oscilloscope data by taking the fault line and fault time provided by the impedance method as references. According to the invention, a travelling wave integrated distance measuring length is obtained through integrated analysis on the impedance distance measuring length and the travelling wave distance measuring length. Various distance measuring methods are combined so that the distance measuring reliability is guaranteed, and conditions of distance measurement failure are reduced.