18 results about "Inductive Resistance" patented technology

The utility model relates to a pressure touch button and an electronic device thereof, comprising a body, two sides of the bottom of the body are provided with elastic beams which extend outwards and have elastic deformation, the elastic beams are connected with a strain sensing unit in the thickness direction, and the strain sensing unit comprises four strain sensing resistors which are arranged in a quadrilateral manner. When pressure is applied to the body, the pressure can be transmitted to the elastic beams from the body to cause deformation of the elastic beams, the elastic beams are arranged on the two sides of the bottom, so that the deformation of the two elastic beams is different due to the different acting positions of the applied pressure, and the values of the induction strain units installed on the elastic beams are different. Therefore, the functions of pressure identification and touch sensing are realized. Compared with the prior art, the pressure touch key and the electronic device thereof can achieve the purpose of being simple and compact in structure.

The application discloses a kind of active shutdown test equipment, method and system of hybrid commutation converter, and compensation power module includes multiple power modules in series together;Power module includes diode, capacitor and controllable switch;Series capacitor and controllable switch are connected in parallel to the two ends of diode;The diode of multiple power modules is in series together;Test product and first inductive reactor are connected into first branch, and the first end and the second end of first branch are respectively connected the first end of direct current inductance and the first end of capacitor;Test product and second inductive reactor are connected into second branch, and the first end and the second end of second branch are respectively connected the first end of direct current inductance and the second end of capacitor;Test product includes one or more integrated gate commutated thyristor;The second end of direct current inductance is connected to the first end of compensation power module, and the second end of compensation power module is connected to the second end of capacitor.Compensation power module can supplement energy, use inductive resistance value smaller inductance, small volume and low cost.

The invention discloses a charging and discharging circuit of a magnetizer, which comprises a charging and discharging circuit and a current detection circuit which are connected in sequence, and is characterized in that the charging and discharging circuit is used for enabling a magnetizing coil to generate a magnetic field, and the current detection circuit is used for detecting a discharging peak current in the charging and discharging circuit; the charging and discharging circuit comprises a voltage regulating and boosting circuit, a rectifying circuit, a capacitor bank circuit, a two-way discharging control circuit, a magnetizing coil and a current transformer which are connected in sequence; the current detection circuit comprises an inductive resistor, a voltage comparator, a voltage follower and a discharge controller which are connected in sequence. According to the invention, the charging and discharging period is short, the temperature rise of the power device is avoided, and the charging voltage of the capacitor bank is accurately controlled.

The invention belongs to the technical field of steel smelting, and relates to a full-grade direct reduction iron pretreatment device. The device comprises a direct reduction iron preheating vertical shaft, a direct reduction iron feeding device and an electromagnetic induction heating coil. The direct reduction iron preheating vertical shaft is arranged at the top of the converter / electric furnace and extends in the vertical direction, and a DRI outlet is communicated with an inlet of the smelting furnace; the direct reduction iron feeding device is mounted at the top end of the direct reduction iron preheating vertical shaft, and internal DRI can be graded and distributed into the direct reduction iron preheating vertical shaft in rows when the direct reduction iron feeding device is started; and the electromagnetic induction heating coil covers the outer side of the direct reduction iron preheating vertical shaft. According to the device, efficient preheating of the DRI can be achieved on the basis of original preheating equipment. An electromagnetic induction coil is arranged outside a direct reduction iron preheating vertical shaft, a net-shaped induction heating rod is installed inside the direct reduction iron preheating vertical shaft, the dependence of a single heating mode on the DRI metallization ratio is broken through, high-grade DRI is rapidly heated through the direct induction eddy current effect, and medium-grade and low-grade DRI is heated through induction resistance heat of the induction heating rod; and the electromagnetic induction coil is simple and convenient to install, not easy to damage and low in maintenance cost.

The invention relates to the technical field of medical equipment, in particular to a bipolar inner-cooling radiofrequency ablation needle capable of accurately detecting and positioning. After an operator introduces the needle body into a focus tissue, cooling liquid flows into the inner tube through the water inlet tube and then flows into a gap between the inner tube and the negative electrode connecting tube for cooling, and meanwhile, the positive electrode radio frequency connecting line and the negative electrode radio frequency connecting line are started to measure an inductive resistance value between the needle tip and the outer needle tube; whether the area where the needle head is located reaches the working range or not is judged for positioning, after positioning is completed, the radio frequency line is used for transmitting energy to the needle point and the working area of the outer needle tube for radio frequency ablation, and during the period, the temperature control probe on the temperature measurement connecting line senses the temperature of the needle point for auxiliary temperature control to prevent overheating. The needle point is positioned by effectively utilizing the change of the resistance value between tissues, and meanwhile, the temperature control and ablation of radio frequency are realized, so that the stability and the practicability are better, and the popularization and the use of equipment are facilitated.

A backlight keyboard device comprises a light-emitting unit and a thin film circuit unit. The light-emitting unit comprises at least one light-emitting part. The thin film circuit unit comprises a substrate, a lower covering film layer arranged on the top side of the substrate, a lower copper laying layer arranged on the top side of the lower covering film layer, a base material layer arranged on the top side of the lower copper laying layer and an upper copper laying layer arranged on the top side of the base material layer. The circuit board comprises an upper copper laying layer, an upper covering film layer arranged on the top side of the upper copper laying layer, a fixed adhesive layer arranged on the top side of the upper covering film layer, an upper circuit layer arranged on the top side of the fixed adhesive layer, and a plurality of inductive resistors arranged between the fixed adhesive layer and the upper circuit layer, the upper circuit layer, the fixing glue layer and the upper covering film layer jointly define at least one containing groove for containing the light-emitting part, so that the overall thickness is reduced on the premise that the ghost key prevention function is achieved.

Disclosed in the present invention are an induced voltage measurement method, apparatus and system for a loop impedance clamp meter. The method is executed by a loop impedance clamp meter, and comprises: controlling a voltage excitation coil to generate a first excitation voltage at a first frequency in a loop to be measured, so as to acquire from a voltage measurement loop a first induced current corresponding to the first frequency; and on the basis of the first induced current and a preset inductive resistance in the voltage measurement loop, performing calculation to obtain a first induced voltage corresponding to the first induced current, and on the basis of the number of turns of a transformer coil corresponding to the loop to be measured and the number of turns of a voltage measurement coil, obtaining an actual induced voltage in the loop to be measured after the loop to be measured is excited by the voltage excitation coil. The present invention solves the technical problems in the prior art of high difficulty and low accuracy involved in induced voltage measurement, and the induced voltage measurement being easily affected by external environmental factors.

The application discloses a kind of complex structure ceramic tank body precision brazing device and welding method thereof, it is related to ceramic brazing field, and brazing device includes tank body body heater, tank body outer surface local induction resistance wire heating bin, tank body internal local induction resistance wire heating bin;Tank body body heater includes electromagnetic induction coil;Tank body outer surface local induction resistance wire heating bin includes first electromagnetic induction heating resistance wire, and tank body internal local induction resistance wire heating bin includes second electromagnetic induction heating resistance wire.The application generates alternating magnetic field in electromagnetic induction coil using high-power high-frequency alternating current power supply, generates eddy current heat on electromagnetic induction heating resistance wire, heats filler metal in tank body internal brazing seam to welding temperature to implement brazing, realizes the rapid forming of internal brazing seam of complex ceramic structure device.And using multiple heaters, realize accurate control of temperature in different regions, reduce temperature gradient, prevent cracking.

A key device of a backlight keyboard comprises a substrate, a thin film circuit board, a flexible circuit board, a key cap, a supporting module, at least one induction resistor and a light-emitting part. The thin film circuit board is arranged on the substrate and can generate a trigger signal after being pressed. The flexible circuit board comprises a lower laid copper circuit sheet arranged above the film circuit board, a base material sheet arranged above the lower laid copper circuit sheet, and an upper laid copper circuit sheet arranged above the base material sheet. And the key cap is positioned above the flexible circuit board and has light transmission. The supporting module comprises an elastic body which is arranged above the flexible circuit board and elastically supports and abuts against the key cap. And the inductive resistor is arranged on the upper copper laying circuit sheet. And the light-emitting part is arranged on the upper laid copper circuit sheet and can directly project light to the key cap.

The present application relates to the technical field of medical equipment, and particularly relates to a bipolar inner-cooling radiofrequency ablation needle capable of accurate detection and positioning. First, an operator inserts a needle body into a lesion tissue, then flows cooling liquid into the gap between the inner tube and the negative electrode connecting tube through the water inlet pipe for cooling, and simultaneously starts the positive electrode radiofrequency connecting wire and the negative electrode radiofrequency connecting wire to measure the inductive resistance value between the needle tip and the outer needle tube, judges whether the area where the needle head is located reaches the working range for positioning, after the positioning is completed, utilizes the radiofrequency wire to transmit energy to the needle tip and the outer needle tube working area for radiofrequency ablation, and in this period, the temperature control probe on the temperature measuring connecting wire senses the temperature of the needle tip for auxiliary temperature control to prevent overheating. The equipment has the advantages of simple structure, effective utilization of the change of the resistance value between tissues to realize the positioning of the needle tip, simultaneous realization of radiofrequency temperature control and ablation, good stability and practicability, and is beneficial to the popularization and use of the equipment.

The utility model discloses a multifunctional test box for testing lamp products, which integrates three sets of test networks, namely a high-frequency protection conductor current weighted test network, a 50K omega non-inductive resistance measurement circuit and a measurement network for sensing or reflecting weighted contact current. Any test network can be selected for testing through the test network selection module, a weighted selection module is arranged in the measurement network for sensing or reflecting the weighted contact current, and selection for testing unweighted contact current and weighted contact current can be realized through the weighted selection module. According to the multifunctional test box, the test efficiency and the test safety of lamp products can be improved.

The invention discloses an electronic load device with low inductive reactance. The electronic load device comprises a first radiator, a first load circuit module, a first conducting strip, a first polarity connecting part and a second polarity connecting part, the first load circuit module comprises a first circuit board and a plurality of first power elements arranged on the first circuit board. The first conducting strip extends in the first direction and is erected on the first circuit board, so that the first circuit board is configured between the first radiator and the first conducting strip. The first polarity connection portion is coupled to an end portion of the first heat sink and protrudes in a first direction. The second polarity connection portion is coupled to an end portion of the first conductive sheet and protrudes along the first direction. The first polarity of the first power element is coupled to the first heat sink, and the second polarity is coupled to the first conductive sheet. Therefore, the distance between the two polarity connecting parts is reduced, the inductance value can be reduced in the power supply transmission process, the path impedance is reduced, and the voltage drop is further reduced.

The present application relates to the technical field of electrical detection, and in particular to a non-inductive resistance device, a dry capacitor detection system and a detection method. The non-inductive resistance device comprises a mounting plate body and a double-stranded reverse resistance wire. The double-stranded reverse resistance wire is arranged on the mounting plate body and is adapted to be electrically connected with the dry capacitor. In the discharge state of the dry capacitor, the double-stranded reverse resistance wire obtains the current output in the discharge state of the dry capacitor and is used to eliminate the inductance generated by itself by using the current. The present application solves the problem that the resistance wire generates inductance when passing through the current, the inductive inductance generated by the resistance wire itself causes the overall inductance value of the entire test device to change, the inductance generated by the wire itself is uncontrollable, and the accuracy of the experimental results is affected, thereby providing a non-inductive resistance device, a dry capacitor detection system and a detection method.

The invention discloses a diaphragm wall pouring construction concrete surface depth measurement system and a detection method, and relates to the technical field of diaphragm wall construction, the system comprises a signal feedback line, a main connection wire and a calibration resistance wire, a first end of the signal feedback line is electrically connected with a measurement contact of a display structure, and a second end of the signal feedback line is electrically connected with a second end of the main connection wire; the first end of the main connecting wire is electrically connected with the positive electrode of the display structure, and the first end of the calibration resistance wire is electrically connected with a calibration contact of the display structure; the second end of the signal feedback line, the second end of the main connecting wire and the second end of the calibration resistance line are electrically connected, and the second ends of the three are connected to the counterweight structure. The signal feedback line is provided with a plurality of depth sensing resistors which are arranged at equal intervals; the display structure is used for displaying the depth of the concrete surface in the pouring slotted hole in real time; the number of the blasting resistors is equal to that of the depth sensing resistors, and the blasting resistors and the depth sensing resistors are connected in parallel one by one; the blasting resistor is provided with a breakable shell; the depth of the concrete surface is measured through resistance change, the precision is high, construction is efficient, and cost is saved.

A hybrid induction-resistive heating system for processing semiconductor substrates includes a single induction coil surrounding a cylindrical susceptor and at least two resistive heaters disposed within the susceptor. The susceptor provides electromagnetic shielding to isolate the coil from the resistive heaters. A controller independently regulates heater output in response to temperature measurements within the heater to equalize temperatures across multiple zones of the susceptor. In operation, the coil provides rapid bulk heating while the resistive heaters supply localized spot heat, resulting in uniform thermal conditions along the length of the heater. The system achieves temperatures up to 2300° C. suitable for heat treating silicon carbide substrates in batch processes.

The application discloses a kind of radio frequency ablation equipment calibration devices, including shell, circuit integration panel is equipped in shell, the front of shell is equipped with operating display screen and 6 wiring ports, respectively, excitation output port, signal return port, ablation electrode port, neutral electrode port, platinum resistance temperature sensor interface 1 and platinum resistance temperature sensor interface 2;The back of shell is equipped with exhaust fan;The circuit integration panel is mainly used for the processing of radio frequency ablation quality control data, including central processing unit, analog-digital conversion module, display module, time module, radio frequency high voltage signal processing circuit, output power detection circuit and temperature detection circuit;The device uses high-voltage differential, non-inductive resistance system, precision temperature and other multi-sensor integrated system, effectively improves the calibration quality control work of radio frequency ablation equipment, so that the calibration of radio frequency ablation equipment is more standardized and accurate.

A semiconductor package includes a package substrate, a semiconductor chip, and a plurality of bonding wires. The package substrate includes a connection pad. The semiconductor chip is disposed on the package substrate and includes a chip pad, a bonding pad, and a redistribution layer. The bonding pad is closer to an outer edge of the semiconductor chip than the chip pad. The redistribution layer is connected between the chip pad and the bonding pad. The bonding wires are connected in parallel between the connection pad and the bonding pad. By the above configuration, the inductive resistance of the circuit can be effectively reduced.

The invention relates to the field of analog integrated circuit design, and discloses a self-adaptive oblique wave compensation circuit system applied to a buck-boost circuit. The system mainly comprises a current sensor and a ramp signal generator, the current sensor mirrors the current of a pull-up power tube to a pull-up mirror tube according to a specific proportional relation, and the current is converted into a voltage signal through an inductive resistor; the ramp signal generator reduces the influence of the input voltage on the slope of the ramp signal through the divider resistance network, and controls the on-off state of the reset switch tube through the reset signal controlled by the pulse width modulation signal and the clock signal. By introducing the pulse width modulation control signal, the ramp signal generator only works when the pull-up power tube is turned on, the problem of sub-harmonic oscillation possibly occurring when the duty ratio of the step-down-boost circuit is greater than 50% is effectively solved, meanwhile, the influence of the input voltage on the ramp signal is reduced through resistance voltage division, and the stability of the ramp signal generator is improved. And the stability and the anti-interference capability of the circuit are improved.