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

The invention discloses an automatic gain control device and an automatic gain control method. In the device, the energy classification is conducted on received signals, different gain control process flows are adopted for different energy levels, so that the strengths of the input signals are controlled in a certain range, thereby being adapting to the signals in various strength levels, so that a signal receiving system can achieve the best receiving effect.

The invention provides a method to fast automatic control gain, which comprises: setting threshold value for energy of input signal; determining the signal with strength over indication range of A / D converter according to threshold, reducing its energy by analog gain control; determining the controlled gain by comparing reduced signal energy and target energy to adjust the strength of input signal till achieving specific range. This invention makes signal receive system in WLAN has fast auto-control gain ability to achieve optimal receive effect.

The invention discloses a file cabinet which comprises a cabinet body, wherein the cabinet body is internally provided with partitions; the partitions divide the cabinet body into a plurality of containing cavities; cameras are arranged at the upper part of the cabinet body; sterilizing lamps and reading lamps are arranged at the upper parts of the containing cavities; the cabinet body is hinged to a door; the cabinet body is also connected with the door through a safety lock; a control panel and a handle are arranged on the outer side of the door; the control panel is connected with the cameras, the sterilizing lamps, the reading lamps and the safety lock and comprises a storage module, an information display screen, an identity authentication module and a control module; the storage module is used for storing a file record sheet, user information, monitoring information and a user sign authority database; and the identity authentication module is used for recognizing a user identity.The file cabinet can solve the problems of incomplete information records of an operator and poor confidentiality, and file safety and file protection are improved.

The present invention proposes an oxygen delivery device on the way of transporting fish, comprising: an oxygen cylinder; a gas distribution pipe, the gas distribution pipe has an air inlet and a plurality of gas outlets, and the air inlet is connected to the oxygen cylinder; There are a plurality of nano gas outlet heads corresponding to the gas outlets one by one, and each nano gas outlet head is correspondingly connected with each of the gas outlets. According to the oxygen delivery device on the way of transporting fish according to the embodiment of the present invention, the liquid oxygen is stored in the oxygen cylinder, which can provide a reliable oxygen source, and the oxygen delivery process does not generate noise; multiple nano-gas outlets can correspond to multiple fish transport foam boxes, and replenish water Dissolved oxygen to ensure the survival of live fish.

The invention provides a motor control method. According to an external control signal, a motor is started to rotate from a waiting state. The method comprises the steps that the motor is started according to the duty ratio of the external control signal; whether the external control signal is noise or not is judged, and the motor is switched back to the waiting state if yes; whether the motor starts to rotate or not is judged, and the motor continues to be driven according to the duty ratio of the external control signal; when the external control signal is not noise, a first time frame is exceeded after the motor is started, and the motor does not start to rotate, the motor is switched to be started according to a preset drive signal; after the motor is started according to the preset drive signal, and a second time frame is exceeded, the motor is switched to be driven according to the duty ratio of the external control signal. The invention further provides a corresponding motor control device.

The invention relates to the technical field of fire fighting equipment, in particular to an electric trigger and a fire extinguishing device. The electric trigger comprises a primary lead, a safety element, a secondary lead and a bridge wire. The safety element comprises a magnetic core. A primary coil and a secondary coil are wound around the magnetic core. The primary lead is connected with the primary coil. The secondary lead is connected with the secondary coil. The end, away from the secondary coil, of the secondary lead is connected with the bridge wire. A triggering chemical is arranged on the surface of the bridge wire, and a dampproof layer is arranged on the surface of the triggering chemical. The fire extinguishing device comprises the electric trigger. Providing the electric trigger and the fire extinguishing device is the purpose, so that the technical problems that in the prior art, the stray current resisting capability and the anti-jamming capability are poor are solved, and the probability of mistakenly starting the fire extinguishing device is reduced by improving the electric trigger.

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 relates to an autonomous power supply type water pump. The autonomous power supply type water pump comprises a base and a shell, wherein a motor is arranged on a top plate, a solar charging device is arranged on a bottom plate, a sealing cover for sealing a water inlet is arranged on the shell, a sensor is arranged on the sealing cover, a sealing plug is arranged on the shell, a connecting groove is formed in a solar charging assembly, and a control assembly is arranged between the connecting groove and the sealing plug. The autonomous power supply type water pump has the advantages that when the sensor arranged on the sealing cover detects that a water inlet pipe is mounted at the water inlet, the solar charging device is triggered to be pushed out of the bottom plate, at the moment, the solar charging device receives solar energy to start charging, and after a water outlet pipe is mounted, an operator only needs to connect the sealing plug with the connecting groove, so that a pin is in contact with a switch to trigger the solar charging device to be switched on, the autonomous power supply of the motor is realized, normal operation of the motor is ensured, the wrong start of the motor in the mounting process can be prevented, the power supply of low voltage at the beginning of charging of the solar charging device to the motor is also avoided, and the overall service life is prolonged.

The invention provides a fast automatic gain control method. The method includes: setting a threshold value of the energy value of the input signal; determining a signal whose intensity exceeds the range indicated by the analog-to-digital converter according to the threshold value, and adopting analog gain control to reduce the energy of the signal; converting the reduced signal energy Comparing with the target energy to determine the gain of the automatic gain control, and using the gain to adjust the intensity of the input signal so that its intensity reaches the required specific range. The invention can make the signal receiving system in the WLAN communication have the ability of fast automatic gain control, and can make the signal receiving system achieve the best receiving effect.

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.

The invention relates to the technical field of fire control circuits, and concretely relates to mutually-isolated multi-wire circuit modules, which overcomes the problem that conventional multi-wire modules interfere with each other and helps to ensure that a system functions normally. Each mutually-isolated multi-wire circuit module includes a system control circuit module, a state acquisition circuit module, an external interface circuit module and a power supply module, wherein the system control circuit module and the state acquisition circuit module are connected and communicate with each other through an isolation communication circuit module, the system control circuit module is connected to a hand-operated starting circuit module, the hand-operated starting circuit module is connected to a multipath control starting circuit module, the multipath control starting circuit module and the state acquisition circuit module are both connected to the external interface circuit module, the system control circuit module is connected to the external interface circuit module through an alarm controller communication circuit module, and the power supply module is connected to the external interface circuit module.

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.

The invention relates to the technical field of engines, in particular to an engine starting control method and control device, which aims to solve the technical problem that an engine is mistakenly started due to an interference signal before being autonomously started. The engine starting control method comprises the following steps of acquiring a current state of the engine; acquiring rotatingspeed signals of the engine according to the current state of the engine in combination with a starting machine; controlling the rotating speed signals so as to carry out filtering processing, and filtering out rotating speed signals with signal jumping in the rotating speed signals; and matching with an autonomous starting rotating speed signal according to the rotating speed signals subjected tofiltering processing, and controlling the engine and the starting machine offline so as to enter an autonomous operation state. According to the engine starting control method and control device, effective filtering processing is carried out aiming at large abnormal jumping appearing at instantaneous speed rotating before the engine is autonomously started, and the phenomenon that the engine is mistakenly started due to the disturbance of rotating speed fluctuation before being autonomously started can be reduced.