43 results about "External resistance" patented technology

The invention discloses a flexible multi-dimensional force sensing device, comprising a first insulator having a plurality of three-dimensional structures protruding from the surface; the first conductor is made of a flexible conductive material and is in the shape of long-strip stitches, the stitches are connected with one another to form a conductive network, the stitches are adhered to the surface of the first insulator and distributed on the surface of the three-dimensional structure unit, and the three-dimensional structure unit is used for transmitting borne normal pressure, shear force and torsional force to the corresponding stitches; the first conductor has a piezoresistive effect, when the first conductor is stressed to generate elastic deformation, the stitch is stretched or compressed, and the resistance at the stressed position changes regularly; and connecting each trace of the first conductor to an external electrical impedance scanning imaging device so as to detect pressure information of each position on the surface of the flexible multi-dimensional force sensing device at each moment. On the basis, the flexible multi-dimensional force sensing equipment is simple in structure, low in cost, easy to process, good in fitting degree for a curved surface shape, and excellent in stability and robustness.

The invention provides a circuit and method for setting a PWM duty ratio and a power management system. The circuit comprises a comparison module, a logic control module, a digital logic module, a voltage selection module and a PWM generation module. The comparison module comprises a demand voltage generation unit and a comparison unit. The demand voltage generation unit generates demand voltage in a certain scene, the comparison unit compares the demand voltage with voltage provided by the voltage selection module, the logic control module analyzes the comparison result to generate a digital signal, and the digital logic module determines the range of the demand voltage. The logic level signal corresponding to the required voltage is obtained and sent to the PWM generation module, so that the PWM generation module sets the duty ratio, and therefore, the interference of power supply variation and signal noise can be reduced, the control precision of the duty ratio can be improved, the setting of different required duty ratios can be realized by adjusting the external resistor, the design is simple, and the integration level is high.

The utility model discloses a passive RFID tag, an upper computer is connected with a reader-writer through a serial port line, the reader-writer is connected with a reader-writer antenna through a radio frequency line, the reader-writer antenna is in wireless communication with a tag antenna of the passive RFID tag through an air interface, the passive RFID tag comprises a plurality of RFID chips, each RFID chip comprises four pins, and the pins are connected with the reader-writer antenna. Wherein two pins are connected in parallel with a tag antenna, and the other two pins are connected with a pin which is connected with an external resistor to be measured. A conventional resistance measuring scheme needs a battery to supply power or a power line, and an RFID-based testing scheme does not need a power supply and can be used in places where wiring is inconvenient, such as an assembly line and a rotating scene. A conventional passive RFID tag cannot detect external analog quantity. The passive RFID tag of the utility model is connected with the pin through the pin, and is connected with an external resistor to be detected through the pin, so as to detect the external analog quantity.

The application discloses a kind of bionic visual sensor devices with pulse coding capability.Light quantum reaches device, and photoelectron-hole pair will be generated.Light-generated carriers continue to collide with lattice atoms by the strong electric field force between cathode and anode, and new photoelectron-hole pair is generated.The process will be repeated in turn, and then macroscopic current is generated.Through external resistance voltage division, the electric field between cathode and anode is reduced, so that macroscopic current is quenched, thereby realizing the pulse current lasting several nanoseconds.After tens of nanoseconds, the device quickly recovers to the initial state, preparing for detecting the next light quantum.In addition, the inversion layer formed below the polysilicon gate can effectively regulate the wavelength response of the device, enabling it to have a biologically reasonable visual color perception ability.Meanwhile, the device is fully compatible with standard microelectronic technology, enabling large-scale integrated bionic visual sensors to meet the development needs of fields such as bionic robots.

The utility model provides a roof board assembly which comprises a plurality of board bodies and flow guide grooves, the board bodies can be connected with one another, and the flow guide grooves are formed in the connecting positions so as to drain infiltrated rainwater. The first connecting part and the second connecting part used for being connected with the first connecting part are arranged at the two ends of the plate body in the length direction of the plate body respectively, the first connecting part and the second connecting part are bent to guarantee stable installation, and the structures are fixed in an engaged mode so that installation can be convenient. The waterproof structure has the beneficial effects that infiltrated rainwater can be discharged through the diversion trench, so that double waterproof effects of external resistance and internal discharge are achieved; the structure is simple, the construction progress and the construction cost can be guaranteed, and the waterproof and moisture-proof performance is improved.

The application relates to a passive resonant transformer type position sensor, which comprises an antenna PCB, a target PCB, processing circuitry, an input port and an output port; wherein the target PCB comprises a first copper-clad plate, a first rectangular copper foil target coil, a first external resistance and an external inductance, the antenna PCB comprises a second copper-clad plate, a second rectangular copper foil excitation coil, a multi-period cosine / cosine copper foil receiving coil, a single-period cosine / cosine copper foil receiving coil and a second external resistance; the receiving coil induces a voltage signal, the output port is used for outputting the voltage signal of the receiving coil, and the input port is used for inputting an excitation signal to the antenna PCB; the target PCB is connected to a measured object in linear motion, and there is a gap between the target PCB and the antenna PCB and no contact. Compared with the prior art, the application has the advantages of guaranteeing the accuracy of detection, reducing the cost of the transformer type sensor, improving the service life of the sensor and the like.

The invention provides a unique address verification system and method for a serial detection hub chip, and the method comprises the steps: determining a corresponding target resistor path according to a to-be-detected unique address through a control unit, and controlling the target resistor path to be switched into a conduction state; the serial detection hub chip detects an external resistance value corresponding to a resistor external pin after the target resistor path is switched to a conducting state; the control unit sends a verification signal to the serial detection hub chip; the serial detection hub chip identifies the verification signal and feeds back a confirmation signal to the control unit when the unique address to be detected in the verification signal is matched with the external resistance value; and the control unit confirms that the unique address to be tested passes the verification under the condition of receiving the confirmation signal. According to the serial detection hub chip, the conduction state of the resistor path externally connected to the resistor external pin of the serial detection hub chip is directly switched through the control instruction, so that testing of different unique addresses is completed, tedious operation such as resistor replacement is reduced, and the testing efficiency and accuracy can be remarkably improved.

The invention discloses a floating island type microbial fuel cell sensor for monitoring a water pollution event on line, and belongs to the technical field of environmental protection. The sensor comprises a sinking bucket, a floating island, a support frame, an anode, a cathode, an external resistor, a data collector, a solar panel and a monitoring terminal. According to the sensor, the anode is buried in the soil in the sinking bucket, and the sinking bucket is suspended below the floating island, so that the sensor does not need to submerge into the bottom of the wetland to embed the anode, and is suitable for monitoring the deep wetland; the device is provided with a data collector and a solar panel, so that electric signal data can be transmitted to a computer and a mobile phone terminal online in real time; by introducing a machine learning algorithm, a nonlinear mapping model between the output voltage signal of the microbial fuel cell and the pH value of the water body is established, so that the monitoring terminal can intelligently analyze the voltage data acquired in real time, thereby realizing high-precision, continuous and online monitoring of the pH value of the water body.

A post-driver with low voltage operation and electrostatic discharge protection is provided. A post-driver structure includes a drive unit including a pull-up driver and a pull-down driver, a pad connected to an external resistance, and an output node connected between the pull-up driver and the pull-down driver. The output node is configured to connect to a comparator for impedance calibration of the drive unit. The post-driver structure also includes an operational amplifier connected to a first transistor and the pad in a closed loop configuration. The operational amplifier is further connected to a second transistor to form a current mirror circuit between the operational amplifier and the drive unit. The current mirror circuit replicates a voltage at the pad with a voltage at the output node for the impedance calibration.

The invention discloses a hardware time-delay control circuit, and the circuit comprises a hardware time-delay module which comprises a timer, an external resistor, and an external capacitor; the timer is arranged to be a monostable circuit, the external resistor is electrically connected with the external capacitor to form a delay loop, and the delay loop is connected to the trigger end and the threshold end of the timer; the discharge end of the timer outputs a delay signal; the optocoupler isolation module comprises an optocoupler device and a phototriode, the input end of the optocoupler device is electrically connected with the discharging end of the timer, and the phototriode is electrically connected with the output end of the optocoupler device; according to the invention, the time delay function is organically combined with electrical isolation and power driving, so that the load power supply can be ensured to be switched on after the set time delay, the influence of instantaneous impact on the system is avoided, and the safety, stability and reliability of power supply control are improved.

The utility model discloses a flexible pressure sensor. The flexible pressure sensor comprises a sensing part and a driving circuit. The sensing part comprises a base material, a sealing material, positive and negative sensing electrodes and an internal resistance element; the driving circuit is sequentially connected with an external power supply, an external resistor, an operational amplifier, an analog-digital converter and a micro-control unit. The flexible pressure sensor provided by the utility model can be connected to a circuit in sequence according to the stress condition, and the pressure value and the change trend are calculated through the micro-control unit, so that high-precision and multi-section pressure detection is realized, the limitation of a traditional pressure sensor in the aspects of flexibility, precision and multi-section pressure detection is solved, and the flexibility, the accuracy and the multi-section pressure detection are improved. The device has the advantages that the pressure detection precision and resolution are improved, multi-section pressure measurement is realized, and the bent surface pressure measurement requirement is met.

Provided is a driving control method, of a display of a vehicle, including receiving an input signal selected for one of an open mode and a closed mode of the display of the vehicle, operating a drive motor of the display to move the display to a preset target position according to the input signal for each of the modes, and stopping the drive motor after the display reaches the preset target position, wherein the driving control method further includes detecting external resistance by measuring a current value of the drive motor between the operating of the drive motor and the stopping of the drive motor.

This utility model discloses an extrusion die with external resistance and internal increase to prevent tail shrinkage. It includes an upper die and a lower die that are fitted together. The lower die has a through-hole, and the discharge side of the die hole has a hollow section with an internal cross-section larger than that of the die hole. The upper die has a through-hole stepped inlet. From the inlet to the outlet, the stepped inlet forms multiple sequentially connected cross-sectional dimension changing segments. The internal cross-section of each segment decreases progressively, and resistance-increasing steps are formed between adjacent segments. The internal cross-section of the output side of the stepped inlet is larger than that of the die hole. This design features multiple steps inside the inlet. As the material is extruded through these steps, the resistance gradually increases, pushing the material towards the center and ensuring more complete material intake and a denser structure. This prevents the produced profile from developing tail shrinkage or black core issues.

The present application belongs to the technical field of DC internal resistance testing of lithium batteries, and discloses a DC internal resistance simulation decomposition method and device for wound battery cells, which calculates at least two types of electrode external resistances based on the structural size parameters of the wound battery cell; then, obtains the material fluid parameters of the wound battery cell, and simulates and models the material fluid parameters according to a preset electrochemical model to solve and obtain the material physical parameters of the wound battery cell; then, calculates at least two types of electrode internal resistances based on the material physical parameters, and uses all electrode external resistances and all electrode internal resistances as the DC internal resistance decomposition results of the wound battery cell. This not only eliminates the need for battery manufacturing and actual testing, effectively saving production testing resources and costs, but also subdivides the DC internal resistance of the wound battery cell into multiple electrode external resistances and multiple electrode internal resistances, thereby providing beneficial positive guidance for the structural design of the wound battery cell.

The present application belongs to the technical field of power integrated circuit, and particularly relates to a method for establishing and simulating a lateral high-voltage device equivalent circuit model. The circuit model comprises: a field effect transistor; a drain resistance, one end of which is connected to the drain of the field effect transistor and the second end of which is used as the drain of a high-voltage device; a source resistance, one end of which is connected to the source of the field effect transistor and the second end of which is used as the source of a high-voltage transistor; a body diode, which is connected in series with a diode cathode through a parallel network of a cathode resistance and an inductor, the anode of which is connected to the source of the high-voltage transistor, and the other end of the cathode resistance is connected to the drain of the high-voltage device; a first current source, one end of which is connected to the drain of the high-voltage device and the other end of which is connected to the source of the high-voltage device; and a simulation model, which uses a voltage control resistance value relationship to correct the resistance value of an external resistance. Compared with a traditional model, the resistance expression of the present application has a clear physical meaning, effectively improves the simulation accuracy of the lateral high-voltage device model, and has better convergence.

The invention provides a self-adaptive weak current acquisition and amplification circuit. The self-adaptive weak current acquisition and amplification circuit comprises a weak current acquisition circuit and a self-adaptive amplification circuit, the weak current acquisition circuit comprises a first operational amplifier and an external resistor and is used for converting weak current into a voltage signal; and the self-adaptive amplification circuit comprises a second operational amplifier and an analog electronic switch and is used for carrying out self-adaptive amplification on the voltage signal. The requirement of converting weak current signals into voltage signals by using a low-resistance resistor is met, a self-adaptive amplification circuit is realized according to the magnitude of the voltage signals, and proper acquisition signals can be provided for an AD conversion circuit.

The invention provides a hysteresis comparator and power supply equipment, and relates to the technical field of integrated circuits, a feedback circuit and a bias circuit are integrated in the comparator, hysteresis characteristic adjustment is realized through transmission of internal signals, a feedback path does not need to be established depending on an external resistor, and quiescent current between an input end and an output end is structurally eliminated. The input circuit adopts a differential signal input mode, compared with a single-end input mode, the differential structure can effectively improve the anti-interference capability, and meanwhile direct electrical connection between an input loop and an output loop is reduced. According to the isolation characteristic, a static current path formed by an external resistor in the prior art is avoided, so that the requirement of the input circuit on the driving current is greatly reduced. In conclusion, by constructing an input-output-bias-feedback cooperative circuit architecture, adjustment of hysteresis characteristics is converted from passive dependence on external parameters in the prior art into active controllable internal adjustment, and synchronous improvement of stability, accuracy and adaptability is achieved.

The application discloses a signal transmission chip, a display module and a display screen, and particularly relates to the technical field of LED display screens, and the signal transmission chip comprises a trigger module, a storage module and a processing module; the storage module stores a first parameter used for configuring a driving current of a constant-current driving chip; the trigger module is used for generating a trigger signal; and the processing module is used for processing the first parameter in the storage module according to the trigger signal, so as to output a second communication signal that can be recognized by the constant-current driving chip. The signal transmission chip provided by the application realizes the configuration of the default driving current of the constant-current driving chip without external resistance by storing and processing the first parameter, and on this basis, the display screen user can also adjust the driving current of the constant-current driving chip without external resistance based on the existing controller, so that the existing use habit of the display screen user can be adapted.

A switching device 1 includes a SiC semiconductor chip 11 which has a gate pad 14, a source pad 13 and a drain pad 12 and in which on-off control is performed between the source and the drain by applying a drive voltage between the gate and the source in a state where a potential difference is applied between the source and the drain, a sense source terminal 4 electrically connected to the source pad 13 for applying the drive voltage, and an external resistance (source wire 16) that is interposed in a current path between the sense source terminal 4 and the source pad 13, is separated from sense source terminal 4, and has a predetermined size.

The invention discloses a self-powered electromagnetic branch circuit damper and a control method.The self-powered electromagnetic branch circuit damper comprises an electromagnetic damping execution unit, a digital adjustable external resistance unit and a control power supply unit, the electromagnetic damping execution unit comprises a top cover and a base, and the top cover and the base are connected through a plurality of supporting threaded rods; a dynamic-static magnetic coupling damping structure is arranged between the top cover and the base, a reset spring is arranged between the dynamic-static magnetic coupling damping structure and the base, and the dynamic-static magnetic coupling damping structure is connected with a digital adjustable external resistance unit and a control power supply unit. The electromagnetic branch damper has an energy collection function at the same time, so that reverse power supply to the control module is realized, coil output of the electromagnetic branch damper is connected to a rectifier bridge circuit and supplies power to a microcontroller, a multi-channel relay module and part of sensor circuits after being temporarily stored by a super capacitor and subjected to voltage stabilization and boosting processing, and a complete self-driven energy path is formed.

The utility model provides a dead time control circuit and a drive circuit. Wherein the dead time control circuit is provided with a dead time pin. The dead time control circuit comprises a first current source, a first power tube, a voltage balance circuit and a dead time generation circuit. The first current source is coupled to the power supply voltage. The first power tube is coupled in series with the first current source. The input end of the voltage balancing circuit is coupled with the first end of the first power tube, and the output end of the voltage balancing circuit is coupled with the dead time pin. The dead time generation circuit comprises a second power tube and a charging and discharging circuit. The first end of the second power tube is coupled to the power supply voltage, and the second end of the second power tube is coupled to the ground. The first end of the charging and discharging circuit is coupled with the dead time pin, and the second end of the charging and discharging circuit is coupled with the control end of the second power tube. According to the dead time control circuit and the dead time drive circuit provided by the utility model, accurate control of dead time can be realized by accessing corresponding external resistors.

The utility model relates to an insulation resistance detection circuit which comprises at least two external resistance branches which are connected in parallel, each external resistance branch is composed of a resistor and a switch, one end of each external resistance branch is grounded, and the other end of each external resistance branch is connected with the positive electrode or the negative electrode of a direct-current power supply. According to the utility model, accurate detection of the insulation resistance can be realized only by adding sampling detection on one side of the DC power supply, and the insulation strength of the DC power supply system can not be changed.

The utility model relates to the technical field of motors, in particular to a brake structure for a motor, which comprises a brake mounted on the motor, the brake comprises a brake disc capable of being attracted or released, the brake disc is fixedly connected with a rotating body of the motor, and the brake structure further comprises a control module for braking the brake when the motor is in a pressure building pause stage. The control module is in electric connection / signal connection with the motor. The motor comprises a motor body, and further comprises the brake structure for the motor. The electric pump comprises the motor and a pump body driven by the motor. The scheme is used for solving the problem that in the prior art, temperature rise of the motor is too fast due to the fact that the motor resists external resistance.

To provide a battery resistance diagnosis device and method for diagnosing a resistance abnormality by detecting a sudden change in resistance in a battery cell and a battery sensing line.SOLUTION: A battery resistance diagnosis device includes a current supply unit configured to supply a preset fixed current to a battery cell, a voltage measurement unit configured to measure an open circuit voltage of the battery cell while the fixed current is supplied, an external resistance calculation unit configured to calculate an external resistance value of the battery based on the fixed current and the open circuit voltage of the battery cell, and an abnormality diagnosis unit configured to diagnose a battery abnormality due to a voltage drop by comparing the calculated external resistance value with a preset external resistance value.SELECTED DRAWING: Figure 2

The invention discloses an intelligent power management and repeated restart prevention method for a gateway machine. An independent battery power supply control circuit and an external resistance voltage division type power state detection circuit are arranged on a main board of the gateway machine. The battery power supply control circuit adopts two implementation modes: one implementation mode is based on a switch relay J5 and is suitable for a large current scene; and the second method is based on a P-channel enhanced MOS tube, and is suitable for a low-current and low-power-consumption scene. The resistance voltage division type power supply state detection circuit detects the state of a main power supply through a P02 pin. Meanwhile, virtual sensor data points and guarding tasks are configured, the power supply state is monitored in real time, seamless battery power supply switching when the main power supply is abnormal is achieved, repeated restarting is avoided, and the system has the battery electric quantity calculation and low-voltage protection functions. According to the invention, the problems of power failure alarm delay, repeated restart, battery over-discharge and the like of the main power supply of the gateway machine are solved, the system stability and reliability are improved, the service life is prolonged, and the method is suitable for gateway scenes with different current requirements.

The utility model relates to the technical field of capacitor external resistance, solved the technical problem of too many conductors when capacitor external resistance, especially to a kind of explosion-proof plate with resistance positioning, including as the support base's explosion-proof plate top cover, the explosion-proof plate top cover outside one end is fixedly connected with two symmetrical resistance lead fixed card seat, two the resistance lead fixed card seat one side is at the explosion-proof plate top cover outside surface and is provided with resistance card slot. The utility model is through the setting of resistance lead fixed card seat and resistance card slot, avoid the technical problem that capacitor external resistance needs to consume a large amount of wire, reduce the use of wire, reduce production cost. Meanwhile, through the design of external wire through joint, can be carried out to the external resistance wire and is limited to fixed, guarantees the stability of resistance connection, avoids the problem of unstable resistance connection to occur, improves the service life of capacitor.

The application discloses a kind of quantum superconducting chip on-chip temperature and magnetic field environment measurement method and circuit, including quantum superconducting chip, the quantum superconducting chip is provided with temperature measurement magnetic field measurement module, the temperature measurement magnetic field measurement module uses two Josephson junctions and is connected in parallel to form DC-SQUID structure, and one of superconducting wire branch is placed near and tightly placed on external resistance, when temperature needs to be measured, current is passed into the resistance, the resistance temperature is raised, the local superconducting wire is heated, one way loses superconductivity, at this time only one Josephson junction is connected into circuit;When measuring magnetic field, the current in resistance is cut off, so that superconducting wire restores superconductivity, at this time two Josephson junctions are connected in parallel to form DC-SQUID structure.Compared with prior art superconducting chip temperature measurement method, the application has the advantages of simple structure, simple measurement, simple calibration and temperature calculation method, high sensitivity, wide measurement range, effectively solves the temperature and magnetic field measurement problem of quantum superconducting chip.

The present invention belongs to the technical field of DC internal resistance testing of lithium batteries, and discloses a DC internal resistance simulation decomposition method and device for laminated battery cells. The method calculates various types of pole piece external resistances according to the structural size parameters of the laminated battery cell; then, obtains the material fluid parameters of the laminated battery cell, and simulates and models the material fluid parameters based on a preset electrochemical model to solve and obtain the material physical parameters of the laminated battery cell under specified charge and discharge parameters; then, calculates various types of pole piece internal resistances according to the material physical parameters, and uses all pole piece external resistances and all pole piece internal resistances as the DC internal resistance decomposition results of the laminated battery cell. This not only eliminates the need for battery manufacturing and actual testing, effectively saving production testing resources and costs, but also subdivides the DC internal resistance of the laminated battery cell into various pole piece external resistances and various pole piece internal resistances, thereby providing beneficial positive guidance for the structural design of the laminated battery cell.

In a transistor structure, a 2D channel material is formed after fabrication of a gate insulator and gate (electrode). In accordance with some exemplary “channel-material last” embodiments, a contact area between the 2D channel material and a source terminal and / or drain terminal is much larger than an edge or layer thickness of the 2D channel material, which may only be a few nanometers, for example. This larger contact area may significantly reduce external resistance of a transistor structure. Doping and strain engineering may also be more successfully applied to the “channel-material last” transistor structures disclosed herein, further boosting transistor performance.

The application provides a switch driving integrated circuit and a switch driving setting method, through enabling the first signal and the second signal at different time, so that the voltage control signal generating module or the current control signal generating module generates different voltage or different current under the action of different signals; the power tube driving current generating module can generate the pull-up driving current and the pull-down driving current of the power tube based on the different voltage or the different current. In the application, the different voltage or the different current is generated based on the external resistance network module, so that the resistance of the external resistance network module can be adjusted to adjust the size of the pull-up driving current and the pull-down driving current of the power tube, compared with the prior art, the application can adjust the pull-up driving current of the power tube and the pull-down driving current of the power tube through one pin, and the number of pins can be reduced.