68 results about "Total resistance" patented technology

The invention discloses a method for calculating the opening and closing force of a miter gate based on the stroke acceleration of a hoist. According to the method, relevant parameters of the ship lock miter gate are obtained, the hydrodynamic resistance moment caused by the water level difference during opening and closing operation of the miter gate is calculated through a hydrodynamic resistance moment calculation formula considering the stroke acceleration of a miter gate hoist, then the maximum total resistance moment during opening and closing operation of the miter gate is calculated, and finally the opening and closing force of the miter gate is calculated. According to the calculation method, the dynamic water resistance moment can be calculated by directly using the gate submerging water depth, the gate door leaf width, the water level difference value and the stroke acceleration of the hoist, so that the opening and closing force is calculated, the process of converting the water level difference into the pressure intensity is omitted, and the influence of the stroke acceleration of the hoist is increased; and a more convenient calculation method is provided for estimating whether the maximum opening and closing force for opening and closing the gate exceeds the rated capacity of the hoist or not when the operation mode of the gate of the ship lock is changed.

The invention provides a water leakage point positioning method and device based on resistance gradient calculation, and the method comprises the steps: obtaining a total resistance value and a tail end resistance value of a water leakage induction rope, and reading a preset resistivity parameter per unit length; calculating the distance of a water leakage point based on the total resistance value, the tail end resistance value and the resistivity parameter per unit length; according to the mapping relation between the length of the induction rope and the physical position established in the installation and debugging stage, the distance of the water leakage point is converted into the physical position described by corresponding 3D coordinates or characters; the physical position information is combined with real-time monitoring data to generate alarm prompt information containing a specific water leakage point location, and the alarm prompt information is output to a monitoring interface, so that accurate positioning of the water leakage point can be realized, the fault response time is remarkably shortened, and through a multi-thread data acquisition and dynamic alarm judgment mechanism, the real-time performance and the alarm accuracy of the system are improved; and the false alarm and repeated alarm frequency is reduced.

The invention discloses a method for measuring metal silicide resistance in a semiconductor device, a polycrystalline silicon size monitoring method and a product electrical property monitoring method. The method comprises the following steps: respectively applying a high potential or a low potential to two ends of a square resistor corresponding to the metal silicide, and measuring the total resistance value of the square resistor of the metal silicide; because the total resistance value of the metal silicide square resistor is interfered by the resistor of the ion implantation layer, the total resistance value of the metal silicide square resistor is used as the metal silicide resistor after the interference of the resistor of the ion implantation layer is removed. According to the method, the interference problem of the ion implantation layer is innovatively proposed and is removed through an accurate calculation method, so that the actual resistance value of the metal silicide which is not interfered by the ion implantation layer can be obtained. Compared with a traditional measurement method, the measurement result of the method is more accurate and reliable, and a solid data basis is provided for subsequent polycrystalline silicon size monitoring and semiconductor device performance evaluation.

The application discloses a composite material structure bushing reinforcing method based on electromagnetic loading, which uses electromagnetic loading to complete the bushing reinforcement of the composite material structure, and obvious beneficial effects are obtained compared with traditional methods. The method proposes a process parameter calculation method for the reinforcement process of the structure to solve the problem that existing devices and methods cannot be applied to the bushing reinforcement of the composite material structure. The radial compressive stress around the hole is obtained through the Lame formula and the elastic stress-strain relationship of the composite material, and then the total resistance of dynamic extrusion friction in the reinforcement process is obtained through the Coulomb friction theory, and the process parameters are determined in combination with the mathematical model of the electromagnetic force. The application can realize the calculation of the reinforcement process parameters of the composite material bushing with different structures and sizes, and is used for guiding the reinforcement of the dynamic cold extrusion composite material bushing structure.

The utility model discloses a stop valve capable of reducing total resistance, which relates to the technical field of valves and comprises a valve body which is divided into a low-position inlet cavity and a high-position outlet cavity, a partition plate is provided with a communicating hole for the low-position inlet cavity and the high-position outlet cavity, and the stop valve further comprises a valve rod which can longitudinally penetrate through the upper side wall of the valve and the communicating hole and enter the low-position inlet cavity. The bottom end of the valve rod is connected with a blocking piece of an inverted-T-shaped structure, the outer wall of the valve rod is slidably sleeved with a valve plug used for blocking the communicating hole, a pressure relief hole of an I-shaped structure is formed in the side wall of the valve rod, and the blocking piece selectively abuts against the bottom wall of the valve plug to be used for opening and closing an opening, located in the low-position inlet cavity, of the pressure relief hole. The pressure relief hole in the valve rod is used for forming a pressure relief channel in the low-position inlet cavity and the high-position outlet cavity, fluid in the low-position inlet cavity can be guided into the high-position outlet cavity through the pressure relief hole, the impact force of the fluid in the low-position inlet cavity for flushing the valve plug is reduced, and the resistance of the valve plug abutting against the opening in the bottom end of the communicating hole from the low-position inlet cavity and blocking the communicating hole is reduced; meanwhile, the rotating resistance of the rotating valve rod is reduced.

The invention relates to the technical field of semiconductors, in particular to a source-drain parasitic resistance processing method, a parasitic resistance structure and a test structure, and the method comprises the steps: determining the first total resistance of any one field effect transistor in a preset number of field effect transistors under different overdrive voltages; performing linear fitting on the different overdrive voltages and the first total resistance under the different overdrive voltages to obtain a first test resistance; determining a second total resistance when the preset number of field effect transistors are connected in series; performing linear fitting on the number of the preset number of field effect transistors connected in series and the second total resistance to obtain a second test resistance; and performing source-drain parasitic resistance analysis processing on the first test resistor and the second test resistor to obtain source-drain parasitic resistance. According to the invention, the extraction convenience and feasibility of the source-drain parasitic resistance can be improved.

The application discloses a memory data reading stability method and device, which comprises the following steps: after determining a reference trimming module, adjusting the equivalent resistance value of the reference trimming module to the optimal resistance value obtained in advance, connecting the second output end of a sensitive amplifier connected with the reference trimming module with a trimming module to be adjusted, and adjusting the trimming module to be adjusted according to the output signal of the sensitive amplifier, so that the total resistance values of each reference circuit and the first trimming module connected with each reference circuit in series are equal, the size of the reading window is increased, the stability of the read data is improved, and the sensitive amplifier in the memory is multiplexed.

The embodiment of the invention discloses a method and device for dynamically adjusting an external resistance test of a locomotive intelligent driving system, and the method comprises the steps: determining a test line and a test scene, and selecting a resistance model calibration library corresponding to the test line and the test scene; according to the test line and the resistance model calibration library, determining a combination sequence of calibration values at each to-be-tested position of the test line; and adjusting an output value of the locomotive resistance simulation model at each to-be-tested position of the test circuit according to the combined sequence, and completing the external resistance test of the test circuit in the test scene. By means of the mode, the total train resistance output after injection resistance calibration in a simulation test can be close to the actual on-site effect, the locomotive intelligent driving control capacity can be better verified, and a locomotive intelligent driving system can be conveniently and more comprehensively verified.

A compensation resistor is gated by arranging a compensation circuit switch to be gated in synchronization with the reception of a bit cell, and corresponding resistance compensation is performed on the bit cell which is gated by a total resistance value of a pre-designed compensation resistor array structure, and compensation resistor traces are sequentially connected in series into two metal wires.

A method for determining an insulation resistance in a power system that comprises: a DC power source 7, positive and negative voltage rails 3,4, a chassis 5, high and low side insulation resistances RISOH, RISOL, first and second capacitances CISOH, CISOL, and a fault monitoring device 2. The fault monitoring device can assume at least two states. The method comprises: determining a first time constant of a first exponential voltage signal after a first state change, wherein the fault monitoring device assumes a first resistance after the change; determining a second time constant of a second exponential voltage after a second state change, wherein the fault monitoring device assumes a second resistance after the change; inserting the first time constant and resistance in a formula in which the time constant is equal to the product of the total resistance and capacitance; inserting the second time constant and resistance in the same formula; and reorganizing the two equations to arrive at an insulation resistance as a function of the first and second time constants and the first and second resistances.

The invention discloses a threshold determination and identification method suitable for power semiconductor bonding wire fracture identification. The method comprises the following steps: counting an average value of total resistance of a bonding wire and a power source lead terminal of a brand new power semiconductor; aiming at the conditions that any one bonding wire is broken, any two bonding wires are broken and any three bonding wires are broken, counting the average value and the standard deviation of the total resistance change values of the bonding wires under the three conditions; determining a probability density function of a change rate threshold value of three aging values relative to a reference value based on an average value of total resistance of a bonding wire and a power source lead terminal of the brand new power semiconductor and an average value and a standard deviation of total resistance change values of the bonding wire under three conditions; and three change rate thresholds are determined through a probability density function. According to the invention, the accuracy of the identification criterion can be effectively improved, and the online identification of the fracture condition of the bonding wire can be realized.

The application relates to the technical field of electrochemical sensors, in particular to a coding resistance unit and a biosensor, which comprises: carbon lines and silver lines which are mutually superimposed, and the silver lines divide the carbon lines into two regions; further comprising a laser-engraved pattern which is completely within the range of the carbon lines, the laser-engraved pattern is divided into two parts by the silver lines and corresponds to the two regions of the carbon lines respectively; resistance units corresponding to gears are compiled according to the length and width of the laser-engraved pattern in each region of the carbon lines, the shape of each resistance unit changes with the change of the length and width of the laser-engraved pattern; the resistance units in the same region are connected in series with each other, and the resistance units in different regions are connected in parallel with each other; the resistance values of the resistance units are calculated and summed to obtain a total resistance, and a corresponding coding value is generated based on the total resistance. The application has the effect of generating and identifying the coding identity of as many biosensors as possible through a simple structure.

The present application relates to a hybrid resistance generation system for fitness equipment, the system comprising a set of counterweights providing a first source of resistance and an electromechanical resistance module providing a second source of resistance, the two sources of resistance being connected in series by a counterweight lever such that the resultant total resistance acts on a first cable operably connected to a user interface, the electromechanical resistance module includes an electric motor with a winch for winding and unwinding a second cable that is removably connected to the counterweight lever by a tool-free adapter.

The invention discloses a power supply control method and device for an underwater robot in a hydraulic tunnel, and the method comprises the steps: 1, obtaining the cable release length, the cable surface area and the water density of the underwater robot, and the relative water flow speed of the underwater robot, and calculating the total resistance value of a cable; 2, performing nonlinear exponential gain compensation based on the total resistance value of the cable to obtain a dynamic pressure compensation voltage value; step 3, performing voltage correction operation according to the working current corresponding to the total resistance value of the cable and the total resistance value of the cable to obtain a voltage correction value; 4, accumulating the dynamic voltage compensation voltage value and the voltage correction value to obtain a target voltage output value, and supplying power to the underwater robot according to the target voltage output value; the dynamic change of the underwater environment can be coped with, and the power supply of the underwater robot is adjusted so as to adapt to different working conditions.

The invention discloses a shield tunneling machine disc cutter chord eccentric wear failure judgment method, which comprises the following steps: establishing a disc cutter stress prediction model, and calculating the rotating torque Tro of a disc cutter; based on the relevant parameters of the disc cutter and the rock, the total resistance moment Tre borne by the disc cutter in the rotating process is obtained; when the total resistance moment Tre borne by the disc cutter in the rotating process is larger than the rotating moment Tro of the disc cutter, the disc cutter cannot rotate, at the moment, the relative sliding coefficient xi in the contact area of the disc cutter and the rock is 1, the disc cutter is abraded under the relative sliding friction effect of the rock, and it is judged that the disc cutter chord eccentric wear failure occurs; otherwise, it is judged that the disc cutter chord eccentric wear failure does not occur. The method has the advantages that the total resistance moment Tre borne by the disc cutter in the rotating process and the rotating moment Tro of the disc cutter are calculated and compared, and therefore whether the disc cutter chord eccentric wear failure occurs or not is judged.

The invention is applicable to the technical field of computer-aided zipper design, and particularly relates to a luggage waterproof zipper meshing resistance determination method, which comprises the following steps: acquiring actual test data and a three-dimensional model of a to-be-tested luggage waterproof zipper; based on the three-dimensional model, constructing a simulation model of the waterproof zipper of the luggage to be tested; based on the test time and the test stroke, performing a simulation test on the simulation model to obtain a simulation result; based on the simulation result and the actual test data, carrying out iterative optimization on key parameters of the simulation model to obtain a calibrated simulation model; and based on the test time and the test stroke, performing a simulation test on the calibrated simulation model to obtain the meshing resistance of the waterproof zipper of the to-be-tested luggage. The method not only breaks through the limitation that a traditional testing means can only obtain the total resistance and errors are caused by structural damage, but also remarkably improves the fineness and accuracy of resistance analysis.

The utility model relates to a switch technical field provides a kind of potentiometer formula multi-gear switch, including adjusting mechanism;Moving contact, with the adjusting mechanism connection;Resistance body, towards the side of moving contact is equipped with multiple recess, and moving contact rotates with the adjusting mechanism and is set in the recess;PCBA board, with the resistance body connection, and the PCBA board side away from the resistance body is provided with first pin, second pin and third pin, the resistance between the first pin and the second pin is the total resistance of the resistance body, the third pin is between the first pin and the second pin, and the third pin is connected with the moving contact.The utility model provides a kind of potentiometer formula multi-gear switch, utilizes the resistance linear variation of potentiometer and exports different voltage value, and the anti-magnetic field interference performance is strong, improves the accuracy of detection.

The utility model discloses a low-resistance energy-saving resistance wire which comprises a resistance wire body, connecting lugs are arranged at the two ends of the resistance wire body, the resistance wire body comprises a main core, a resistance reducing layer is arranged on the outer side of the circumference of the main core, the main core is one of a nickel-chromium alloy core and a copper-nickel alloy core, and the resistance reducing layer is a graphene plating layer. According to the energy-saving resistance wire, the two insulating layers are arranged, and the conducting layer of the resistance wire is divided into three layers, so that a parallel circuit is formed, the total resistance of the resistance wire can be effectively reduced, meanwhile, the current which can flow through is smaller than that of a single strand, the power of the resistance wire is further reduced, and the energy-saving effect is achieved.

The invention discloses a trimming method of a resistor body for an absolute position high-precision angular displacement potentiometer, and belongs to the technical field of production of angular displacement potentiometers based on conductive plastic resistor bodies. The position close to the C end is the position B, and the area between the A and the B is the effective working tape area. The trimming method comprises the following steps: carrying out linear trimming on the area between the A and the B on the working tape; and trimming an area between the B and the C on the working tape, specifically, calculating an actual resistance value between the B position and the A end, calculating a theoretical total resistance value, testing an actual resistance value between the A end and the C end, and carrying out nonlinear trimming on the area between the B and the C based on a difference value between the actual resistance value and the theoretical total resistance value. According to the invention, the effective working tape area and the invalid working tape area are trimmed respectively, so that the absolute position control linearity precision of the resistor body is greatly improved.

Methods, processes, and systems for monitoring a resistive element and determining temperature are provided. A method includes: dividing the resistive element into n-number of segments and a sensor segment; measuring, by a sensing unit, total resistance data of the resistive element; measuring, by the sensing unit, temperature data of the sensor segment; computing, by a processor, resistance data of the sensor segment based on the temperature data to generate sensor segment resistance data; computing, by the processor, temperature distribution data for each of the n-number of segments based on the total resistance data, the sensor segment resistance data, and the temperature data; and generating, by the processor, output data based on the temperature distribution data for each of the n-number of segments.

This application discloses a layout structure, chip, and electronic device for a resistor string, belonging to the field of circuit technology. In the chip including the resistor string, multiple resistors are arranged in an N-row, M-column array; the multiple resistors are connected in series along two diagonals parallel to the N-row, M-column array, where N and M are both positive integers. This allows process offsets generated along different directions, such as rows or columns, to cancel each other out, thereby minimizing the total resistance value offset of the resistor string caused by process offsets and improving the performance of the resistor device.

The invention discloses an explicit solution method of ball disc oil film resistance, which comprises the following steps: enabling a single roller and a bearing ring of a bearing to be equivalent to a ball-disc contact model, establishing a resistance solution formula based on the ball-disc contact model, and dividing a contact area into a lubrication area, a deformation area and a breakdown area; the explicit solution method comprises the following steps of ball-disk potential solution, lubrication area resistance solution, lubrication area resistance correction, deformation area resistance solution, breakdown area resistance solution and total resistance solution. According to the explicit solution, the mode of calculating the capacitance by calculating the potential and the charges is applied to resistance calculation in an analogy mode, the influence of the oil immersion angle is considered by changing the integral limit, the influence of the contact angle on the oil film resistance is corrected through the weighted average calculation mode, the calculation error can be reduced, and the method is suitable for more working conditions.

The invention relates to the technical field of electrochemical sensors, in particular to a coding resistor unit and a biosensor, the coding resistor unit comprises a carbon wire and a silver wire which are overprinted with each other, and the silver wire divides the carbon wire into two areas; the laser engraving pattern completely falls into the range of the carbon line, and the laser engraving pattern is divided into two parts by the silver line and respectively corresponds to the two areas of the carbon line; according to the length and the width of the laser engraving pattern in each area of the carbon line, respectively compiling resistor units of corresponding gears, wherein the shape of each resistor unit changes along with the change of the length and the width of the laser engraving pattern; the resistor units in the same area are connected in series, and the resistor units in different areas are connected in parallel; and calculating the resistance value of each resistor unit and summing to obtain total resistance, and generating a corresponding coded value based on the total resistance. The method has the effect of generating and recognizing biosensor code identities as many as possible through a simple structure.

The utility model discloses an AC / DC combined load box for detecting an electric power test power supply, which comprises at least one first series branch, at least one second series branch and at least one current sensing device, and is characterized in that the first series branch is formed by connecting at least two parts with the total resistance value of 100 ohms in series; the first series branch is formed by connecting at least two parts with the total resistance value of 10 ohms in series, the second series branch is formed by connecting at least two parts with the total resistance value of 10 ohms in series, each part of the first series branch and the second series branch is composed of a fixed resistor, and one end of the current sensing device is connected to the initial end or the tail end of the first series branch. The load box is configured in a manner that the resistance values of the load box for the power test can be combined to be 220 omega, 110 omega, 55 omega, 20 omega, 10 omega and 5 omega. The load box provided by the utility model does not need complex technical operation, improves the test convenience and efficiency, effectively reduces the production cost, can provide more stable and reliable load conditions in the electric power test process, and is helpful for improving the test accuracy.

The invention belongs to the field of strain sensing, and discloses a strain sensing model of a flexible piezoresistive sensor based on a contact effect, an establishment method and a strain prediction method. The building method of the model comprises the following steps: calculating the contact resistance Rc between two stacked conducting strips in the piezoresistive sensor; constructing an equivalent circuit of the piezoresistive sensor by taking the contact resistance Rc as an equivalent resistance, calculating the resistance of the equivalent circuit as the total resistance RTotal of the piezoresistive sensor, and obtaining the relationship between the total resistance change rate of the piezoresistive sensor and the number n of the contact points; and substituting the relationship between the contact area between the two stacked conductive sheets and the number n of the contact points and the relationship between the contact area and the change of the piezoresistive sensor after strain into the relational expression to construct a strain sensing model. According to the method, the quantitative relation model of the resistance change rate and the strain of the piezoresistive sensor is established, quantification and visualization of the sensing process are achieved, the measurement precision is remarkably improved, and good engineering applicability is achieved.

The application discloses a kind of fan blade die face state monitoring method, system, device and medium, it is related to wind power technology field, to timely monitor the state of fan blade die face, lay ladder resistance network on die face, and ladder resistance network is made of several resistors, if the state of fan blade die face is normal, all resistors in current ladder resistance network are parallel, so as to monitor whether the state of fan blade die face is normal, the current total resistance value of current parallel resistor in each resistor needs to be determined, and whether the state of fan blade die face is normal is judged by judging whether current total resistance value after parallel satisfies preset condition, the state of fan blade die face can be timely and accurately judged by measuring the current total resistance value of current parallel resistor in each resistor on ladder resistance network, realizes the real-time monitoring of the state of fan blade die face.

The present invention discloses a method for constructing a series and parallel circuit involving multiple negative resistance units of different forms. Under the premise that each operational amplifier works in a linear voltage working area and the output current of the operational amplifier does not exceed the maximum output current of the operational amplifier used, according to the method of the present invention, multiple negative resistors of different forms can exhibit the same series or parallel characteristics as positive resistors when connected in series or in parallel, that is, the total resistance of the negative resistors in series is the simple addition of the resistance values ​​of the individual negative resistors, and the reciprocal of the total resistance of the negative resistors in parallel is equal to the sum of the reciprocals of the resistance values ​​of the negative resistors of each branch. This method can make the types of negative resistors in series or in parallel no longer limited to the same type when the negative resistors are connected in series or in parallel, and the number of series and parallel connections can be multiple. This method focuses on describing the grounding terminal positions of multiple negative resistors in series and parallel connection and the connection order of the negative resistors. This method has certain reference value in circuit design and engineering practice and can be used for circuit design.

The present invention relates to a connection structure of a shape memory alloy (SMA) spring (a spring made of shape memory alloy materials) used in an actuator. Specifically, the present invention relates to an actuator, which utilizes an SMA spring to generate an auxiliary force, and to a connection structure for the SMA spring used in the actuator, which provides mechanical characteristics enabling a robust connection of multiple strands of SMA springs to generate the auxiliary force, while enabling an electrical connection at the same time. In addition, according to the connection structure of the SMA spring of the present invention, the series-parallel combination structure can be changed, and thus it is possible to change the total resistance value of the actuator and arrange the SMA springs without entanglement. Also, the present invention has the advantage of adjusting the number of connections of the SMA springs.

This invention relates to a method for analyzing the resistance components of a waterjet-propelled ship model. First, a resistance test is conducted on the bare hull. Next, a self-propelled test is performed to determine the rotational speed of the waterjet propulsion device at a given self-propelled point. Then, an L-shaped nozzle is installed, and the waterjet propulsion device operates at the self-propelled point rotational speed at a specific speed, measuring the total hull resistance. Simultaneously, the flow field in the flow region is measured using PIV technology, and the inlet longitudinal momentum is calculated. Finally, the total resistance is subtracted from the bare hull resistance and the inlet longitudinal momentum to obtain the impact of the propeller operation on the hull resistance at the corresponding self-propelled point. This invention employs conventional resistance tests, L-shaped nozzle resistance tests, self-propelled tests, and flow field measurements in the flow region to decompose the resistance into the hull's own resistance components and the hull resistance increment caused by the suction effect of the waterjet propulsion device. This allows for the identification of the propeller's impact on the hull, reducing hull shape optimization to a single objective function optimization problem and improving hull shape optimization efficiency.

The method and the device for measuring the contact resistance of the pole pieces are provided, the pole pieces comprise a positive pole piece and a negative pole piece, in the thickness direction of the pole pieces, the positive pole piece comprises a positive active material, a positive current collector and a positive active material which are arranged in sequence, and the negative pole piece comprises a negative active material which is arranged in sequence. The method comprises the following steps: acquiring the total resistance between the positive pole piece and the negative pole piece; obtaining internal resistance; obtaining the contact resistance of the pole piece according to the total resistance and the internal resistance; and adjusting the temperature and humidity of the space where the positive pole piece and the negative pole piece are located, so as to obtain the pole piece contact resistance of the pole pieces at different temperatures and humidity.