34 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.

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 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 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 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.

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.

The invention relates to a temperature compensation circuit for a primary side sampling feedback flyback converter, which is characterized in that a first input end of a voltage buffer module is connected with a positive temperature coefficient source of a primary side sampling feedback DCDC flyback converter system, a second input end of the voltage buffer module is connected with an external resistor, and an output end of the voltage buffer module is connected with a current mirror module; outputting current related to the temperature; the output end of the current mirror module is connected with a primary side sampling module of the primary side sampling feedback DCDC flyback converter system, and the received current related to the temperature is mirrored as the temperature compensation current of the system; the temperature compensation current is injected into the primary side sampling module to compensate the influence of the forward voltage drop of the secondary side rectifier diode on the output voltage along with the temperature change. According to the scheme provided by the invention, the reverse influence on the sampling voltage caused by the change of the forward voltage drop of the secondary side rectifier diode along with the temperature can be counteracted, so that the output voltage of the primary side sampling feedback DCDC flyback converter system tends to a zero temperature coefficient.

The utility model provides a novel battery power management device relates to the technical field of battery power management. Relate to a kind of novel battery power management device, comprising: pressure sensing module: connecting liquid level pressure sensor, for real-time acquisition and processing the liquid pressure signal of the depth where solenoid valve is located;Microprocessor: receive the analog signal of pressure sensing module, after ADC conversion, the maximum drive current required by solenoid valve is calculated;Adjustable external resistance: controlled by microprocessor, receive the control signal of microprocessor to adjust resistance value;Solenoid valve driver: connecting adjustable external resistance output end, by changing the ground resistance value dynamic adjustment output current upper limit. The utility model solves the technical problem of how to save the energy consumption of solenoid valve, prolong the service life of power supply battery.

The application relates to a bioelectrochemical method for monitoring root exudates in situ, comprising placing a bioelectrochemical sensor in a water culture tank, wherein the bioelectrochemical sensor comprises an anode electrode, a cathode electrode and an external resistance connected in series through a wire, the anode electrode is arranged to be deep in the plant roots, and the cathode electrode is arranged in the water culture tank; plant rhizosphere microorganisms or microorganisms with extracellular electron transfer function are attached to the surface of the anode electrode to form a biofilm, the plant root exudates are sensed by the biofilm as an organic carbon source to generate a voltage signal, and the plant growth is stressed; the anode electrode pre-acclimated by the microorganisms generates protons and electrons, the protons are transmitted to the cathode electrode through mass transfer, and the electrons are transmitted to the cathode electrode through the wire; the external resistance voltage signal is measured and processed to judge the total amount change of the organic components in the root exudates.

The utility model relates to the technical field of barrier gates, in particular to a barrier gate machine core and a barrier gate. According to the technical scheme, the sealing device comprises at least two machine bodies and a sealing driving mechanism installed in the machine bodies, and further comprises a sealing plate installed on the sealing driving mechanism, and the sealing plate comprises a plurality of sealing plates rotationally installed on the sealing driving mechanism and a limiting assembly installed in the machine bodies; and the limiting assembly is used for fixing the sealing plate when the sealing plate is completely closed. In the process that the blocking plate moves to the outer side of the machine body, the blocking plate can rotate reversely, so that when the blocking plate is subjected to external resistance, the blocking plate can rotate reversely, people are prevented from being pinched, and after the supporting plate moves to the blocking position of the gate, the blocking plate is in a fixed state, and the state of effectively blocking the gate is kept.

The present application relates to the technical field of current signal processing, and discloses a one-way current detection method of a power tube, wherein the power detection part and the common-mode signal extraction unit are used to process power signals respectively to obtain power detection signals and common-mode detection signals, the power detection signals and the common-mode detection signals are subjected to bias voltage superposition respectively to obtain first detection signals and second detection signals, the first signal processing module and the second signal processing module are used to process the first detection signals and the second detection signals respectively to obtain voltage feedback signals having a fixed proportional relationship with one-way current signals, the technical scheme improves the precision and stability of current detection, effectively suppresses common-mode noise, enhances the reliability of signal processing, and realizes accurate control through voltage feedback with a fixed proportional relationship, thereby solving the problem of high cost of external resistance for detecting a circuit in the prior art.

The embodiment of the application relates to the technical field of electric vehicles, and discloses a failure diagnosis system, method and equipment for an insulation detection function of an electric vehicle, the system comprising a diagnosis equipment and a server in communication connection, wherein the diagnosis equipment comprises a direct current bus, N detection resistor groups and an equipment ground, the N detection resistor groups one-to-one corresponding to N resistance value intervals, each positive electrode detection resistor being connected to a positive electrode end of the direct current bus and the equipment ground through a first switch, and each negative electrode detection resistor being connected to a negative electrode end of the direct current bus and the equipment ground through a second switch. The diagnosis system can determine whether the detection of the electric vehicle on external resistance is accurate, and further determine whether the insulation detection function is normal or fails. Based on the one-to-one correspondence between the N detection resistor groups and the N resistance value intervals, in multiple diagnoses, the diagnosis system can detect the measurement accuracy of the electric vehicle on the resistance of each resistance value interval, so that the diagnosis result is more accurate.

The utility model discloses a power supply electromotive force and internal resistance measuring circuit, which comprises a target power supply, a voltage and current measuring unit and a power display unit, and is characterized in that the voltage and current measuring unit measures basic values of the target power supply and inputs the measured values into the power display unit electrically connected with the voltage and current measuring unit; and calculating the obtained numerical value through the power display unit to obtain the output power of the power supply, and displaying the output power. According to the Ohm law of the closed loop, the output power of the power supply is changed along with the change of the external resistance, and when the external resistance of the circuit is equal to the internal resistance of the power supply, the output power of the power supply is maximum. By using the law, the electromotive force and the internal resistance of the power supply can be obtained. According to the measuring method, the tedious step that images need to be drawn in subsequent numerical processing when measuring circuits such as a current voltammetry or a volt-resistance method are used for measuring can be simplified, and the internal resistance and the electromotive force of the power supply can be obtained only by reading the output power of the power supply and performing simple calculation.