41results about How to "Reach the protective function" patented technology

The invention relates to a portable electromagnetic wave strength detecting device and method. The portable electromagnetic wave strength detecting device comprises a signal detecting module, a GPS module, a microprocessor control module and a display module, wherein the signal detecting module is used for detecting electromagnetic wave signal strength data, the GPS module is used for collecting geographical location information data, the microprocessor control module is used for fusing the electromagnetic wave signal strength data and the geographical location information data, and the display module is used for displaying the fusing results. The portable electromagnetic wave strength detecting device can detect multiple wireless signals within multiple frequency ranges at the same time, monitor the signal strength changes in real time and solve the jump signal missing detection problem. The geographical location information data corresponding to current electromagnetic wave signal strength data are collected through the GPS module, data or / and image display is carried out through the display module, and therefore a user can conveniently observe the geographical location information data in a visualized mode. The portable electromagnetic wave strength detecting device is convenient to carry, simple in operation, high in detection accuracy and low in cost.

The invention relates to a switch type power supplying device with output current limit. The knee voltage of feedback voltage is obtained by a voltage sample and a retaining controller, then a square root opening operation and an error operation are respectively carried out on the knee voltage, and the action of a power switch is controlled according to operation results to achieve double functions of voltage-stabilizing output and current limit.

The invention discloses an emulator and method for supporting NVM soft breakpoint debugging and relates to the technical field of chip emulation. The emulator comprises an emulator debugging module and emulator hardware, wherein the emulator hardware mainly comprises a chip function debugging module, a CPU, a chip MMU, a chip NVM, a chip RAM, a debugging RAM and other modules. The emulator debugging module writes an erasing and writing program and breakpoint data into an erasing and writing program RAM and a breakpoint storage RAM of the debugging RAM respectively, backs up codes of breakpoint addresses in the chip NVM into the breakpoint storage RAM according to the breakpoint data, and controls the CPU to carry out the erasing and writing program to write the codes of the breakpoint addresses in the NVM to be a breakpoint instruction, and the breakpoint setting function is achieved; the breakpoint instruction in the chip NVM is changed back to the backup codes of the breakpoint storage RAM, and the breakpoint removing function is achieved.

The invention discloses a low-voltage-side overvoltage protection circuit. The low-voltage-side overvoltage protection circuit includes a switch tube, a first control circuit and a second control circuit. The output terminal of the second control circuit is connected to the input terminal of the first control circuit. The output terminal of the first control circuit is connected with a base electrode of the switch tube. A collector electrode of the switch tube is connected to output voltage. A transmitting electrode of the switch tube, the first control circuit and the second control circuit are connected to input voltage separately. The low-voltage-side overvoltage protection circuit can work under comparatively low voltage and does not need protection from a large number of composite PTCs. The protection real time performance is high and the universality is good. By adopting the circuit provided by the invention, a load on the rear end of the output voltage can be controlled accurately in real time so as to avoid damage and a protection function can be realized through quick circulation control when low input voltage is over range.

Connected to primary side of a transformer, two electronic switches in use for control of turning on or off two switches convert DC power supply to AC power supply for a load to use. The signal generation circuit includes following parts: a logic unit of AND gate, a NAND gate, a circuit protection unit, a waveform generator, clock generator, soft starting up unit, a sample hold unit, first and second comparators etc. the invention is able to direct control and drive operation of diverter switch in semi bridge type circuit architecture.

The LED device includes following parts: a LED for converting electrical energy to electromagnetic wave; a set of lead wire frames in use for connecting LED to external electrical source; a group containing multiple Zener diodes, and at least one set being as back to back coupling or face to face coupling. Through gold wire or aluminum wire being connected to a lead wire frame, the set of Zener diode is connected to LED in parallel. Besides function of electrostatic protection, the invention can carry out test of reverse voltage in order to screen out products with potential problems. The invention also makes LED device possess overvoltage protection so as to be possible to maintain service life and quality in severe condition.

The invention discloses an initiatively cutting circuit disconnector and particularly relates to the disconnector applied to a power lithium cell power supply. The disconnector comprises a shell body, a temperature sensing mechanism, a heating mechanism and a bridge type contact mechanism, wherein the temperature sensing mechanism comprises a temperature sensing body, the heating mechanism comprises a heating component, the bridge type contact mechanism comprises a bridge type movable spring piece, at least one bridge type static spring piece, an insulating support and a first elastic element, the temperature sensing body is used as a supporting component at one end of the insulating support and is controlled by the heating component, the bridge type movable spring piece is installed on the insulating support, touch point contact is formed between one face, directing towards the other end of the insulting support correspondingly, of the bridge type movable spring piece and the bridge type static spring piece, the bridge type movable spring piece, the bridge type static spring piece and a lithium cell or a lithium cell pack are connected in series and form a lithium cell major loop, and the first elastic element is arranged between the other end of the insulating support and the inner wall of the shell body in an expanding and leaning mode. The disconnector is matched with a cell managing system, the lithium cell major loop is cut when overvoltage or overcharge or overdischarge occurs in the lithium cell, hidden dangers such as fire or explosion of the lithium cell is eliminated under an abnormal condition, and the disconnector has the advantages of being fast in action, small in occupied area, convenient to install and use and the like.

The short-circuit protector for power source includes a comparing control circuit and a change controlling circuit. In the change controlling circuit, the change executing circuit has input connected to the output of the power source module and the output connected to the inputs of the comparing control circuit and the power source output circuit. The state detecting and controlling circuit of the comparing control circuit picks up signal from the output of the change executing circuit, and the output together with the output of the reference circuit is connected to the input of the output circuit. When being short-circuited, the power source is cut off automatically to protect both the power source and the powered part. In addition, there can be alarm function.

The invention relates to a motor control system, in particular to a DC brushless motor starting protection method and circuit. The technical problem that most of existing DC brushless motor starting circuits start motors directly and logic errors can be caused by poor operation of devices due to an excessive starting current is solved. The DC brushless motor starting protection method comprises the following steps: (1) setting a short-circuit protection current limit value A and an overload protection current limit value B; (2) setting a board-level temperature limit value C; (3) starting a motor; (4) measuring a current value on a power supply trunk line of the DC brushless motor; (5) collecting a current signal, and judging whether the value of the current signal reaches the short-circuit protection current limit value A or not; (6) judging whether the value of the current signal reaches the overload protection current limit value B or not, and (7) collecting a board-level temperature value and judging whether the temperature value reaches the board-level temperature limit value C or not. The invention further provides a DC brushless motor starting protection circuit.

The invention discloses a welding tool with a protection function. The welding tool with the protection function comprises a welding tool body, wherein the welding tool body comprises a welding workbench; the top of the welding workbench is fixedly connected to a working platform; the top of the working platform is fixedly connected to two fixing plates; two clamping plates are arranged on the tops of the fixing plates; and control slots are formed between the fixing plates and the clamping plates. The welding tool with the protection function has the beneficial effects that the welding workbench facilitates the welding operation of operators on the workbench and the welding operation process of workers; a protective baffle plate can block sparks generated during working of a welding rod very well, prevents the sparks from sputtering onto bodies of the operators, has a protection effect, improves the safety of the workers during working and achieves the advantage of the production function, thereby effectively solving the problem that the traditional welding tool has a relatively poor protection effect and easily causes unexpected accidents.

The invention discloses medical self-service terminal equipment with good protection performance, and particularly relates to the field of self-service terminal equipment. The medical self-service terminal equipment comprises a box body, a top cover is movably mounted at the top of the box body, a protective cover is movably mounted on the front side of the box body, terminal equipment is arrangedin the box body, and a protective plate is arranged at the top of the terminal equipment. A bottom plate is arranged at the bottom of the terminal device, and clamping blocks are arranged on the twosides of the terminal device. According to the medical self-service terminal equipment, the driving motor is started, the motor drives the screw to rotate, and the screw is in threaded fit with the clamping block, so that the clamping block drives the terminal equipment to move outwards along the screw rod, the outer side of the terminal equipment extrudes the protective cover and extends out of the front side of the box body, and the medical self-service terminal equipment is convenient for a user to use. When themedical self-service terminal equipment is not needed, the driving motor is controlled to rotate reversely to retract the terminal equipment into the box body, so that the function of protecting the terminal equipment is achieved.

The invention discloses laser cutting equipment for decoration plates, and relates to the technical field of cutting devices. The laser cutting equipment comprises a machining table, a cutting device, a control table and supporting columns, protection blocks are fixedly installed on the two sides of the machining table, the cutting device is movably installed on the top of the machining table, and the control table is fixedly installed on the side face of the machining table; and the supporting columns are fixedly mounted at the bottom of the machining table, a cleaning device is fixedly mounted in the cutting device, and a grinding device is fixedly mounted on the side face of the cleaning device. Through the principle that same magnetic forces of a transmission magnetic block and a rotating magnetic block repel each other, the movable transmission magnetic block moves up and down, so that the magnetic force drives the transmission magnetic block to move, then the transmission magnetic block drives a rotating block to rotate so as to drive a grinding block to rotate, and then a mounting block drives a grinding convex block to grind a cutting part; and therefore, the device can conveniently grind a product, and the product quality can be improved.

The invention discloses a medical clinical detection and analysis device with protection function, which comprises a detection and analysis device body, a shell is arranged outside the detection and analysis device body, the detection and analysis device body includes a first instrument cabinet, and the bottom of the first instrument cabinet The second instrument cabinet is fixedly connected to the bottom of the second instrument cabinet, and the bottom of the second instrument cabinet is fixedly connected to a medical supplies storage cabinet. The front of the first instrument cabinet is fixedly installed with a telescopic door, and the front of the telescopic door is fixedly connected to a door handle. There is a first instrument room inside. The present invention protects the detection instrument by arranging the first instrument cabinet and the second instrument cabinet, prevents the instrument from being damaged when the instrument is not in use, improves the protection effect on the detection instrument, and improves the detection efficiency by protecting the instrument. The service life of the instrument achieves the advantages of the protection function, thereby effectively solving the problem that the existing detection and analysis devices are easily damaged and affect the treatment time of patients.

The invention introduces an emulator and method supporting NVM soft breakpoint debugging, and relates to the technical field of chip emulation. The emulator includes an emulator debugging module and emulator hardware. The emulator hardware mainly includes modules such as a chip function debugging module, a CPU, a chip MMU, a chip NVM, a chip RAM, and a debugging RAM. The emulator debugging module writes the erasing program and breakpoint data into the erasing program RAM and breakpoint storage RAM of the debugging RAM respectively, and backs up the code of the chip NVM breakpoint address to the breakpoint storage RAM according to the breakpoint data, and controls The CPU executes the erasing program to write the code of the NVM breakpoint address as a breakpoint instruction to realize the breakpoint setting function; change the chip NVM breakpoint instruction back to the breakpoint storage RAM backup code to realize the breakpoint clearing function.

The invention discloses an automatic flame-retardant device for a safety door based on temperature sensing glass control, and relates to the technical field of intelligent equipment, the automatic flame-retardant device comprises a glass door main body, a door frame and a protective baffle, a sealing block is fixedly mounted on the outer side of the glass door main body, the door frame is fixedly mounted on the outer side of the sealing block, and the protective baffle is fixedly mounted on the top of the door frame. Through a smoke sensor in the fireproof alarm, when smoke is encountered, a signal can be transmitted to the interior of a control room through a network, a worker on duty is reminded, water in a storage box is transmitted to a nozzle in cooperation with a connecting pipe, then the nozzle sprays the water to a glass door body, the water is used for cooling, and the safety of the worker is improved. And spreading fire is slowed down in cooperation with water spraying, the protection function is achieved, the problems that the safety door is poor in flame retardant performance, glass is prone to being broken under the high temperature condition, and the service life of the device is shortened are solved, the flame retardant effect of the device is improved, and the safety performance of the device is improved.

The invention discloses a battery connecting piece with an elastic arm fuse function in the technical field of new energy. The battery connecting piece with an elastic arm fuse function comprises a parallel welding battery core and an overlap welding battery core, wherein the intermediate part of the top of the parallel welding battery core is electrically connected with a first battery core electrical connection piece; the top of the parallel welding battery core is soldered with a parallel welding conductive piece; the front side of the top of the parallel welding conductive piece is electrically connected with four parallel welding bumps; the bottoms of the parallel welding bumps are soldered with the first battery core electrical connection piece; the front side of the top of the overlap welding conductive piece is electrically connected with two overlap welding bumps; the bottom of the overlap welding bumps are welded with the second battery core electrical connection piece; and the top of the each overlap welding bump is electrically connected with an overlap welding electric strike bar. Through combination of the parallel welding conductive piece at the top of the parallel welding battery core and the overlap welding conductive piece at the top of the overlap welding battery core, the battery connecting piece with an elastic arm fuse function improves the safety of the conductive piece while improving the soldering robustness.

The invention discloses an infrared radiation (IR) green protection eyeglass, and particularly relates to a safety eyeglass with an IR protection infrared function. The eyeglass is prepared by mixing the following components in parts by weight: 100 parts of polycarbonate (PC), 116.2 parts of IR0001 color powder, 12.39 parts of 8950 color powder, 5.41 parts of purple B-color powder and 5.34 parts of 8315 color powder. A certain proportion of IR0001 color powder is added into the PC, and the color powder for filtering visible light is added, so that an IR protection function is realized; and the near infrared (780 to 1,400 nanometers) is less than 1.2 percent.

The invention discloses a start and control circuit of a gas discharge lamp electronic ballast. The circuit comprises a frequency sweep generation circuit, an identification trigger circuit, a primary frequency sweep circuit and an enable circuit, wherein the frequency sweep generation circuit is used for generating a PWM wave of which the frequency is changed from high to low; the identification trigger circuit is used for carrying out frequency sweep to a resonance point and triggering a lamp tube, and then eliminating a potential safety hazard when the ballast normally works through modifying resonance parameters; and the primary frequency sweep circuit is used for carrying out primary frequency sweep through the PWM wave to eliminate the potential safety hazard of the ballast in a special state when the ballast is in a non-load or an overload at first. The PWM wave of triggering the lamp tube is lightened through the frequency sweep generation circuit; the frequency sweep generation circuit is cut off through the identification trigger circuit; the potential safety hazard can be reduced through modifying the resonance parameters; and the potential safety hazard that the ballast is in the non-load or the overload at first is eliminated through the primary frequency sweep circuit. An analog circuit disclosed by the invention is simple in structure and low in cost and has practical value.

A reverse connection protection device for providing reverse connection protection for a ground fault circuit breaker, comprising a base, a connection device for carrying electricity and conducting a load, an electromagnetic tripping mechanism and a control circuit. The connection device for electrically conducting the load includes: a first connection device electrically connected to the power supply, a second connection device connected to the load terminal, and a third connection device connected to at least one user-accessible load terminal. The electromagnetic tripping mechanism is operated through the control circuit to drive a frame body to move back and forth. When the release mechanism pulls in, the hook on the frame can be pushed as the first wiring device to connect to the energizing circuit between the second and the third wiring device; The buckle mechanism is in the tripping state, and the ground fault circuit breaker cannot be reset, so that the entire control circuit and the panel jack are not charged, and the ground fault circuit breaker can work normally only when it is installed correctly.

The invention relates to a control module for a household kitchen garbage crusher. The control module for the household kitchen garbage crusher is used for controlling a direct current motor in the household kitchen garbage crusher, and is characterized by comprising an microprogrammed control unit (MCU) controller, an electro magnetic compatibility (EMC) circuit, a power sampling circuit, a power conversion circuit, a rectification circuit, a forward and reverse rotation conversion circuit, a first optical coupling isolation circuit, a second optical coupling isolation circuit, a relay driving circuit, a pulse-width modulation (PWM) half-bridge driving circuit and an metal oxide semiconductor (MOS) transistor (Q1). Compared with the prior art, the control module for the household kitchen garbage crusher provided by the invention has the advantages that: the MCU controller outputs a PWM signal, and the PWM signal passes through the second optical coupling isolation circuit and the PWM half-bridge driving circuit to control the MOS transistor, so that the voltage of power supply circuits at the two ends of a motor is adjusted, and a speed regulation function is achieved; and the MCU controller controls the forward and reverse rotation conversion circuit through the relay driving circuit to select the positive and negative polarities of the two ends of the direct current motor, so that the forward rotation or reverse rotation function is achieved.

The present invention discloses an electrostatic fume purification drive power source. The electrostatic fume purification drive power source comprises a power circuit, a CPU control circuit, a drivecircuit, an output circuit and a signal detection circuit. The CPU control circuit is connected with the drive circuit and the signal detection circuit, the drive circuit is connected with the signaldetection circuit and the output circuit, the output circuit is connected with the signal detection circuit, and the power circuit is connected with the CPU control circuit and the drive circuit; andthe signal detection circuit comprises a signal detection chip, a 160th resistor, a 147th resistor, a 115th resistor, a 132th resistor, a 161th resistor, a 109th diode, a 108th diode, a 116th diode, a107th diode and a 102th transformer. The electrostatic fume purification drive power source can accurately reflect various abnormal conditions, can achieve various protection functions, can achieve automatic matching of the voltage and an electrostatic field and an automatic gear switching function to allow the electric field to work in an optimal state.

The invention discloses a propeller speed regulator which comprises an upper shell assembly, a lower shell assembly, a bottom plate, an oil filter assembly, a speed selecting mechanism, a power turbine adjusting assembly, a gear pump, a pressure regulating and beta valve assembly and a reset handle assembly. Engine incoming oil is connected with a low-pressure oil groove in a bottom plate throughan oil filter assembly, and a gear pump outlet is divided into two paths which are connected with a high-pressure oil inlet of a beta valve assembly and a high-pressure oil cavity of a safety valve assembly respectively. A low-pressure oil cavity of the safety valve assembly is connected with a low-pressure oil groove; a high-pressure oil outlet of the beta valve assembly is connected with a high-pressure oil inlet of the speed selecting mechanism, and a high-pressure oil outlet of the speed selecting mechanism is connected with a propeller oil cavity; an oil return cavity of the beta valve assembly is connected with an oil groove II of the speed selecting mechanism; an oil return port of the speed selecting mechanism is connected with an oil return groove of the engine. The speed governorhas the advantages that the speed can be selected, feathering can be controlled, reverse propeller and balance rotating speed can be adjusted and controlled, the propeller using the speed governor ishigh in working efficiency, a large amount of fuel oil is saved, and working safety and reliability are high.

The invention discloses a wire feeder for welding equipment, and relates to the technical field of wire feeders, the wire feeder comprises a wire feeding device main body, a shell, a control panel and a wire feeding power mechanism, the shell is fixedly mounted on the outer side of the wire feeding device main body, and the wire feeding power mechanism is fixedly mounted in the shell; a connecting column is fixedly installed at the top of the wire feeding power mechanism, and a control panel is fixedly installed on the side face of the wire feeding power mechanism. The fixing bolt is in threaded connection with the fixing block, so that the fixing block is fixed to the wire feeding power mechanism, then the fixing block is matched with the telescopic column to conduct telescopic movement, then the telescopic column drives the connecting rod to move the extrusion block, the extrusion block extrudes and fixes the fixing column, and therefore the fixing function of the wire feeding power mechanism is increased; the problem that due to the fact that the stability performance of a wire feeder is poor, welding wires are prone to shifting when a welding machine works is solved, the fixing performance of the device is improved, and therefore the protection performance of the device is improved.