23 results about "Ohmmeter" patented technology

A single-torus ohmmeter for measuring a loop impedance Zx, includes a single transformer having a primary winding of Np coils and a secondary winding of a single coil forming the measurement loop, in which, to compensate for a stray induction produced by an AC leakage current circulating in the measurement loop without canceling a measurement current Ip generating an alternating induction of constant average value for the measurement of the loop impedance Zx, the transformer includes a second secondary winding of Na coils whose output voltage Ub representative of the AC leakage current is delivered to a processing module providing a voltage intended to be added to an alternating measurement voltage Vp in an adder delivering the current to be injected into the primary winding after passage through a voltage-current converter.

The utility model discloses an electrical testing device for a heating film. Comprising a U-shaped plate, a feeding box, a discharging box, a first rotating shaft, a first servo motor, a pair of driving belt wheels and a pair of driven belt wheels, wherein the feeding box and the discharging box are fixed to the two ends of the U-shaped plate; the first rotating shaft rotates in the U-shaped plate; the first servo motor drives the first rotating shaft to rotate; the two pairs of driving belt wheels and driven belt wheels are arranged on the feeding box in a sleeving mode, the first lifting plate is lifted in the feeding box, the lifting assembly drives the lifting plate to ascend and descend, the second rotating shaft rotates in a U-shaped plate, the first servo motor drives the second rotating shaft to rotate, and one end of the overturning plate is fixedly connected with the first rotating shaft. The adsorption assembly is arranged on one side of the overturning plate; the ohmmeter is fixed on the side edge of the U-shaped plate; the air cylinder is fixed at the inner bottom of the U-shaped plate; the lifting plate II is fixed on a piston rod of the air cylinder; the utility model has the advantage of having the effect of automatically testing the heating resistance value.

The invention discloses a silicon wafer TTV control method based on process optimization, and particularly relates to the technical field of semiconductors, and the method comprises the steps: S1, employing a metal-pollution-free alkali corrosion process; s2, a single-face grinding process is introduced; s3, the regional thickness difference in the silicon wafer polishing process is detected in real time through a dial indicator; and S4, collecting the process parameters, the equipment state and the silicon wafer TTV detection data in the steps S1 to S3. According to the silicon wafer TTV control method based on process optimization, core process parameters such as S1 corrosion time, S2 grinding removal amount, S3 polishing medium pressure and constant-temperature water temperature are collected in a full-dimension mode, the equipment operation state and silicon wafer TTV detection data are recorded synchronously, and comprehensive and accurate data support is provided for model establishment; according to the method, a final silicon wafer TTV prediction model is constructed, and the TTV value of a new batch of silicon wafers can be accurately predicted; and according to the deviation between a prediction result and an actual detection value, parameters of each process are reversely corrected, and a closed loop of parameter input-prediction-verification-correction is formed.

1. The name of the design product: internal resistance meter (color screen portable). 2. The use of the design product: for measuring the internal resistance voltage of various batteries, power sources, etc. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1.

1. The name of the design product: multifunctional test source table (SUM). 2. The use of the design product: a test instrument integrating voltage source, current source, voltmeter, ammeter, ohmmeter and electronic load functions. 3. The design points of the design product: in the front view. 4. The picture or photo that best indicates the design points: front view. 5. The bottom of the design product is not easily visible or not visible during use, so the top view is omitted. 6. Other circumstances that need to be explained: A part of the enlarged view is the enlarged view of A part of the front view.

The utility model relates to the technical field of measuring instruments, and discloses a power connection reliability measuring instrument, which comprises a mounting plate, a conductive column and a microohmmeter, and is characterized in that two workpieces to be tested are placed on a test platform; the mounting plate is horizontally arranged, a plurality of limiting blocks extending downwards are arranged on the peripheral edge of the mounting plate, and the limiting blocks abut against the test platform and / or two workpieces on the test platform, so that the mounting plate is suspended relative to the test platform; the two conductive columns are mounted on the mounting plate and extend downwards, and the two conductive columns are correspondingly connected with the positive electrode and the negative electrode of the microohm meter; in a test state, the two conductive columns are in one-to-one correspondence contact with the two workpieces to be tested, and the measured resistance value of the microohm meter is used as a quantized value of the power connection condition of the two workpieces. The power connection reliability measuring instrument is simple in structure, low in cost, convenient to use and high in measuring speed, and meets the use requirements.

The utility model discloses a frequency converter deceleration over-current fault testing device, which comprises a measuring mechanism. The measuring mechanism is driven by the rotating module and sequentially selects one resistor assembly to test the frequency converter, each resistor assembly has at least two different resistance values, and the resistor assemblies are electrically connected to the output end or the power supply end of the frequency converter; the resistor assembly is electrically connected with a universal meter; when the frequency converter is started, the universal meter detects different load conditions generated by the frequency converter on the resistor assembly and simulates the different load conditions. According to the technology of the utility model, the resistor assemblies with different resistance values are utilized to simulate various different load conditions, so that the performance of the frequency converter can be comprehensively tested, including the performance under low-load and high-load conditions. By monitoring the current value in real time, a highly accurate test result can be provided, and tiny current change can be detected, so that the accuracy of fault detection is improved.

The application relates to the technical field of electronic measuring instruments, and discloses a high-precision ohmmeter, which comprises an ohmmeter body, a rectangular clamping groove is fixedly connected to the bottom of the ohmmeter body, a flexible organ case is fixedly connected to the outer surface of the rectangular clamping groove, a base box body is fixedly connected to the outer surface of the flexible organ case, a first connecting head and a second connecting head are fixedly connected to the right side of the ohmmeter body, a rubber bottom plate is fixedly connected to the bottom of the base box body, a vertical damping mechanism and a transverse damping mechanism are fixedly connected to the lower surface of the rectangular clamping groove, and a longitudinal damping mechanism is fixedly connected to the inner surface of the base box body. Not only can the vibration of the equipment be reduced in the longitudinal direction, but also the vibration in the transverse and vertical directions can be quickly converted to the corresponding damping mechanisms for processing, so that comprehensive damping protection is provided for the equipment. The multi-directional damping cooperation can greatly improve the stability and reliability of the equipment.

The utility model discloses motor commutator detection frock, including base, rotary support mechanism, support and automatic detection mechanism, rotary support mechanism rotation is connected on the base, and the support is fixed on the base, and the automatic detection mechanism is installed on the support, and the automatic detection mechanism is located the top of rotary support mechanism and is used for detecting motor commutator, and the automatic detection mechanism includes: ohmmeter, detection probe, mounting ring, guide rod and spring, and the ohmmeter is installed on the top of support, and the ohmmeter is connected with two detection probes through the wire, and the number of mounting ring is two, and every detection probe all penetrates an mounting ring, and the both sides of every mounting ring all are fixed with guide rod, and the guide rod penetrates the support and is connected with sliding, and the upper half segment outside of every guide rod all is provided with a spring, and one end of spring is fixed with guide rod and the other end is fixed with support. The utility model discloses convenient operation can carry out detection to the insulating property between multiple commutator segments on commutator fast, and the working efficiency is higher.

The invention discloses a resistance value testing method, device and system. The method comprises the steps that an initial calculation model is obtained, the initial calculation model can conduct electrical performance simulation on a mechanical part, and the initial calculation model comprises a part with conductivity to be determined; when a probe of the resistance meter is placed at preset positions on the two sides of the electric conductivity to-be-determined part, actually measured resistance parameters of the electric conductivity to-be-determined part of the mechanical part obtained through actual measurement are obtained; and performing simulation in the initial calculation model by adopting a measurement method which is the same as the actual measurement method to obtain a simulation resistance parameter containing a conductivity-to-be-determined part of the mechanical part, and adjusting the material attribute of the conductivity-to-be-determined part of the mechanical part until the difference between the simulation resistance parameter and the actually measured resistance parameter is smaller than a set threshold value, so as to obtain the conductivity-to-be-determined part of the mechanical part. Determining an optimization calculation model; and performing electrical performance simulation on the mechanical part in the optimization calculation model to obtain the resistance value of the to-be-determined part of the conductivity of the mechanical part, thereby improving the accuracy of the resistance value test.

The utility model relates to the technical field of electronic equipment detection, in particular to a device for quickly measuring the contact resistance value of a relay, which comprises a multifunctional relay, a voltage regulating power supply, a coil, a digital display ohmmeter, a connecting wire, a wiring terminal and a voltage stabilizing power supply, one end of the multifunctional relay is connected with a voltage regulating power supply and a coil, and the other end of the multifunctional relay is connected with a digital display ohmmeter; the multifunctional relay is connected with the digital display ohmmeter through a connecting line, and the digital display ohmmeter is connected with the stabilized voltage supply through a connecting line. By improving the device for rapidly measuring the resistance value of the contact of the relay, the device has the advantages that the structural design is reasonable, the resistance value of each contact of the multifunctional relay is measured through the four independent digital display ohmmeters, the measurement mode is direct and rapid, the measurement accuracy is improved, and the measurement reliability is improved; therefore, the problems and defects in the prior art and equipment are effectively solved.

The application belongs to the technical field of error measurement, and discloses a rotary shaft position related error measurement device and identification method for a double-rotary-table five-axis numerical control machine tool, which comprises an R-test measurement unit, a first standard ball, a second standard ball, a standard ball tool clamp, a connecting rod, a first supporting rod, a second supporting rod and two magnetic bases. The R-test measurement unit comprises a micro-ohmmeter clamp and three micro-ohmmeters, wherein the three micro-ohmmeters are fixed on the micro-ohmmeter clamp; the first standard ball and the second standard ball are fixed on the two ends of the connecting rod; the connecting rod is connected with the first supporting rod and the second supporting rod through two standard ball tool clamps; the first supporting rod and the second supporting rod are fixed on the two magnetic bases respectively, and the two magnetic bases are fixed on a horizontal rotary table; the length of the first supporting rod is greater than that of the second supporting rod, and the first standard ball is arranged at the end of the first supporting rod. The application avoids the clamping error introduced by multiple installations and solves the problem of high difficulty in full-geometric-error identification.

The utility model provides a wind power electric field booster station lightning protection grounding detection device, which belongs to the field of electrical engineering, and comprises a bottom plate, the top of which is provided with a monitoring assembly used for monitoring lightning frequency. One side of the monitoring assembly is provided with a grounding resistance detection assembly used for detecting the ground resistance value. According to the utility model, the cover on the wire box is opened, the coil is pulled out, the two meter pens are installed at the measurement point positions, the grounding resistance is measured through the ohmmeter, the lightning arrester can be normally used if the resistance value is less than 5 ohms generally, otherwise, the lightning arrester is used after the geology is improved, and after the measurement is completed, the meter pens and the coil are put into the wire box. Damage caused by rainwater is prevented.

An information handling system includes a touchpad that accepts touch inputs to move a cursor on a display and that deflects at a front side to accept button inputs. A bracket is disposed between a touch detection surface and circuit board of the touchpad to bias the touch detection surface up and deflect in response to a push down as a button input. Conical spring ground devices coupled to the circuit board on opposing sides of the bracket interface with an ohmmeter included on the circuit board that detects a resistance from a first ground device through the system ground to a second ground device. Resistance across ground is applied by the touchpad processor to adjust touch detection sensitivity and avoid ghost inputs.

The utility model relates to the technical field of conductivity testing, in particular to a copper-clad steel conductivity testing tool. Comprising a rack, a mobile testing device and two guide rails, the mobile testing device comprises a transmission belt, a power assembly used for driving the transmission belt to move and one or more resistance testing mechanisms installed on the periphery of the transmission belt. The resistance testing mechanism comprises a resistance meter and two groups of clamping assemblies; and the two guide rails are symmetrically arranged below the transmission belt. According to the technical scheme, conductivity testing work can be carried out on the copper-clad steel wire in the moving process, the conductivity change of the copper-clad steel wire can be conveniently measured, the working efficiency is high, the interval time in the multiple measurement processes is short, clamping work of the copper-clad steel wire can be automatically completed, and the automation degree is high.

The utility model discloses a hanging bracket matched with a hoisting beam, and belongs to the technical field of underground rail transportation auxiliary devices. The device comprises two clamping plates which are oppositely arranged, two positioning shafts I are mounted between the two clamping plates; a hook is arranged on the positioning shaft I through a chain; a positioning support is further installed in the middle of the clamping plate. Ohmic rings are rotatably installed on the left side and the right side of the upper top of the positioning support respectively. The extending end of the ohmic ring vertically and upwards extends out of the clamping plate; according to the utility model, the problem that the currently used hoisting beam is smaller in width due to environmental restriction and cannot meet the hoisting requirements of some large-scale equipment is effectively solved.

The utility model discloses a positioning clamp for glass resistance testing, which comprises a transparent box, a fixing plate is fixedly mounted on the rear side of the top of the transparent box, eight alarm type ohmmeters are fixedly mounted on the front side of the fixing plate, and a glass resistance testing plate is placed on the top of the transparent box. According to the utility model, the wiring ends of the eight alarm type ohmmeters are electrically connected with the back probes and the front probes respectively, then the glass resistance test board is placed at the top of the transparent box, the back probes extend into the inner cavities of the contact points to realize positioning of the glass resistance test board, and then the operation assembly is operated, so that the glass resistance test board can be tested. The upper pressing transparent plate moves downwards to be pressed above the glass resistance testing plate, and the bottom end of the front probe is in contact with a golden finger of the glass resistance testing plate, so that the resistance values of all positions are displayed through the eight plastic pipes, all the resistance values needing to be tested can be tested at a time, the judgment time is shortened, and judgment errors are avoided. And the efficiency is greatly improved.

The utility model relates to the technical field of coded disc installation and detection, and discloses a high-precision coded disc adjusting device which comprises a coded disc adjusting seat and a dial indicator, a guide rail is fixedly arranged on the coded disc adjusting seat, a rotary table installation plate is connected to the guide rail in a sliding mode, and a coded disc installation plate is rotationally connected to the rotary table installation plate through a rotary table. A to-be-tested code disc is fixedly connected to the code disc mounting plate, a supporting rod is fixedly arranged on the code disc adjusting seat, and a visual adjusting frame is movably connected to the supporting rod. According to the utility model, by accurately adjusting the concentricity of the glass code disc and the mounting plate, the measurement precision of the encoder can be obviously improved, the measurement deviation caused by mounting errors can be reduced, the reliability of equipment can be enhanced, meanwhile, the mechanical stress and unnecessary friction between the code disc and the mounting plate can be reduced, and the service life of the code disc can be prolonged.

The utility model discloses a gypsum self-leveling mortar setting time testing device which comprises an insulating container, a timer, an ohmmeter, a positive wire and a negative wire, gypsum self-leveling mortar is injected into the insulating container, and a first testing point position and a second testing point position are set in the gypsum self-leveling mortar. The head end of the positive wire is connected with the positive electrode of the ohmmeter, the tail end of the positive wire is directly or indirectly electrically connected with the first test point, the head end of the negative wire is connected with the negative electrode of the ohmmeter, and the tail end of the negative wire is directly or indirectly electrically connected with the second test point. Through the mode, the gypsum self-leveling mortar setting time testing device is simple and convenient to operate and high in efficiency, and the testing accuracy is improved.

The utility model belongs to the field of battery testing, and particularly relates to a battery voltage internal resistance testing auxiliary clamp based on an internal resistance instrument, which comprises a first clamp, the first clamp comprises an upper clamping part and a lower clamping part positioned below the lower clamping part, and the first ends of the upper clamping part and the lower clamping part are connected to form an elastic connecting end; the second ends of the upper clamping part and the lower clamping part are contacted to form a clamping end; the upper clamping part is provided with a test gap. According to the utility model, the test gap indicates the clamping position of the test fixture of the internal resistance instrument, the test position can be standardized, and the uncertainty of artificial errors is eliminated, so that the standard, unity and scientificity of the test are achieved; the auxiliary clamp is small in size, light in weight and portable, can be directly clamped on a tab to be positioned through a test gap, and has good operability and practicability; the device is simple in structure, easy to manufacture, low in cost and convenient to popularize and use.

The application discloses a kind of railway signal relay resistance measuring device, by being provided with the measuring platform of power supply, ohmmeter and voltmeter for relay, at least one relay group containing two relays is placed on the measuring platform, by the normally closed contact in one relay and the normally open contact in another relay are connected in series on a power supply, again for one of the coils to be measured on the relay in series with a power supply, so that the corresponding resistance value and voltage value are measured by ohmmeter and voltmeter on the measuring platform, whereby the contact resistance of one relay and the coil resistance of another relay can be calculated according to the resistance value and voltage value, and the coil resistance of one relay and the contact resistance of another relay can be obtained by exchanging the positions of the two relays, thereby realizing automatic resistance measurement without manually measuring the resistance of the relay, improving the efficiency of resistance measurement.

This invention discloses a high-voltage fuse debugging and testing device, relating to the field of high-voltage fuse technology. It includes a pentagonal box with a shifting mechanism for supporting the fuses. The front of the pentagonal box has a pick-and-place opening. This high-voltage fuse debugging and testing device uses multiple sets of lower and upper support seats on the shifting mechanism to install multiple fuses. A third brake motor, a first spur gear, and a second spur gear work together to drive the multiple sets of lower and upper support seats and the fuses to rotate intermittently. An external inspection unit inspects the assembly structure of the fuses. Defective fuses are removed from the unloading port and reassembled. A high-precision micro-ohmmeter, a first detection line, and a first detection column on a DC resistance detection unit measure the DC resistance value of the fuses to determine whether the internal connections are good and whether the contact resistance is within the allowable range.

The utility model discloses a combined teaching aid for exploring distribution characteristics and principles of ohmmeter resistor scale marks. The combined teaching aid comprises a support, a supporting plate, a resistance measuring device, an ohmmeter structure demonstration device, an electrical element and a wire. The supporting plate is mounted on the bracket; the resistance measuring device and the ohmmeter structure demonstration device are installed on the supporting plate from top to bottom. The two groups of electrical elements are respectively an electrical element A and an electrical element B; the electrical element A is detachably mounted on the resistance measuring device; the electrical element B is detachably mounted on the rectangular module 2 ohmmeter structure demonstration device; the lead comprises a common lead and a red and black meter pen; the common wires are used for connecting electrical elements; the red-black meter pen comprises a red meter pen and a black meter pen and is used for externally connecting the electrical component with a to-be-tested component; according to the utility model, the internal structure of the ammeter is visually displayed, thereby facilitating teaching of teachers and understanding of students, and improving teaching effects; students can master knowledge through experimental operation, synchronous display of circuit principles and experimental phenomena is realized, and understanding is deepened.