40 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 invention relates to the technical field of building deformation monitoring, and discloses a building deformation monitoring device which comprises a sliding rail, a moving driving part is arranged in the sliding rail, a protection shell is fixedly installed at the output end of the moving driving part, and a sliding frame is slidably connected to the top of the protection shell in the length direction of the protection shell. The top end of the sliding frame is rotationally connected with a rolling wheel, a first spring is fixedly installed between the sliding frame and the protective shell, and a distance monitoring piece is arranged between the sliding frame and the protective shell. When the cross beam is inclined or bent, the distance between the roller seat and the bottom cover is changed, the resistance rod moves relative to the carbon brush, the length of the part, connected into a circuit, of the resistance rod is changed, and therefore the numerical value monitored by the digital display ohmic surface is changed, manual reading is not needed, and errors are avoided. And the inclination or bending degree of the cross beam or the wall can be more intuitively reflected through a straight line or a curve drawn by the digital display ohmmeter in the coordinate system.

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 an ultra-fast high-temperature sintering system capable of realizing electricity-heat-shape in-situ measurement. The ultra-fast high-temperature sintering system comprises a furnace body, a heating device, a detection device and a control device, the heating device comprises a heat preservation crucible, a heating medium and a heating unit; the detection device comprises a deformation detection unit, a resistivity monitoring unit and a temperature control unit; the deformation detection unit comprises a displacement sensor, and a probe of the displacement sensor is in contact with a sample in the heat preservation crucible; the temperature control unit comprises an infrared thermometer and a thermocouple; the infrared thermometers are mounted on the left side and the right side of the furnace body; the thermocouples are arranged on the front side and the rear side of the furnace body; the resistivity monitoring unit comprises an ohmmeter; and the ohmmeter, the power supply, the sample or the heating medium form a series loop. According to the ultra-fast high-temperature sintering system disclosed by the utility model, the resistivity of a sample, the resistivity of a heating medium, the heat conductivity, the temperature of the sample and the deformation quantity of the sample in the whole sintering process can be measured and monitored in situ.

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.

In some examples, a sensor node is mounted, using two metal fasteners, to a wood item located indoors. The sensor node measures, using a thermometer, an ambient temperature of a location in which the wood item is located, measures, using a hygrometer, an ambient humidity of the location, measures, by an ohmmeter, a resistance of the wood item between the two metal fasteners, determines, based on the resistance, a moisture content of the wood item, and determines, based on the ambient temperature, the ambient humidity, and the moisture content, that conditions are conducive to pest activity. The sensor node captures audio data. using a microphone coupled to the wood item, determines that the audio data indicates pest activity, and sends a notification of pest activity. The notification includes the ambient temperature, the ambient humidity, the moisture content, and the audio data.

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 present invention relates to the field of distribution box testing technology. Specifically, the present invention discloses a distribution box insulation testing device, including a transmission mechanism, the transmission mechanism includes a frame, a conveyor belt rotatably arranged on the side of the frame, a motor installed on the outside of the frame for driving the conveyor belt, and a positioning block installed on the outside of the conveyor belt for positioning the distribution box body; the positioning block is arranged in an "L" shape, four positioning blocks form a group, the four corners of the distribution box body are slidably inserted between a group of positioning blocks, and the positioning blocks are arranged in several groups, which is convenient for placing multiple distribution box bodies. The distribution box body moves to the test position, is connected to the ohmmeter body through the feeler, the contact piece is inserted between the spacer, and the spacer is connected to the ohmmeter body for testing by the contact piece abutting on the spacer, the rack moves downward so that the gear drives the shaft to rotate, the shaft drives the contact piece to move downward first and then rotate, so that the contact piece is separated from the spacer, and the test efficiency is improved.

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 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.

Method for measuring and single-core loop ohmmeter with AC leakage flux compensation. Single-core ohmmeter for measuring a loop impedance Zx, comprising a single transformer having a primary winding of Np turns (14) and a secondary winding of a single turn (16) forming the measuring loop, in which, to compensate for a parasitic induction produced by an AC leakage current flowing in the measuring loop without canceling a measuring current Ip generating an alternating induction of constant average value for the measurement of the loop impedance Zx, the transformer comprises a second secondary winding of Na turns (18) whose output voltage Ub, representative of the AC leakage current, is delivered to a processing module (24,26) providing a voltage intended to be added to an alternating measurement voltage Vp in an adder (22) delivering the current to be injected into the primary winding (14) after passing through a voltage-to-current converter (20). Figure for the abbreviation: Fig. 5.,

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.

In some examples, a sensor node is mounted to a wood item using two metal fasteners. The sensor node measures an ambient temperature using a thermometer, measures an ambient humidity using a hygrometer, and measures, using an ohmmeter, a resistance of the wood item between the two metal fasteners. The sensor node determines, based on the resistance, a moisture content of the wood item. Based at least in part on determining that: the ambient temperature is greater than a temperature threshold, the ambient humidity is greater than a humidity threshold, and the moisture content is greater than a moisture threshold, the sensor node captures audio data using a microphone that is coupled to the wood item. Based at least in part on determining that the audio data indicates pest activity, the sensor node sends, using a communication interface, a notification of pest activity that includes the audio data.

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.

In some examples, a sensor node mounted to a wood item inside a wall of a building uses a thermometer to measure an ambient temperature and uses a hygrometer to measure an ambient humidity inside the wall of the building. The sensor node uses an ohmmeter to measure a resistance of the wood item between two metal fasteners used to mount the sensor node to the wood item. The sensor node determines a moisture content of the wood item based on the resistance. If the sensor node determines, based on the ambient temperature, the ambient humidity, and the moisture content, that conditions inside the wall of the building are conducive to pest activity, then the sensor node captures, using a microphone that is coupled to the wood item, audio data. The sensor node sends a notification of pest activity to a central bub for analysis using artificial intelligence.

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.

A relay checking device comprises a relay base used for being connected with a relay in an inserted mode and a wiring terminal strip, pins corresponding to the relay are arranged on the relay base, and the relay base is connected with an adjustable direct current source, a first ohmmeter, a second ohmmeter, a third ohmmeter and a fourth ohmmeter through the terminal strip. According to the utility model, the relay base, the insulating plate, the guide rail, the terminal strip, the adjustable DC source and the ohmmeter are combined together to form a relay protection device. Wherein the relay base and the terminal strip are arranged on the guide rail, and the guide rail, the direct current source and the ohmmeter are arranged on the insulating plate. According to the utility model, verification is convenient, time is saved, and efficiency is improved.

In some examples, a sensor node measures, using a thermometer, an ambient temperature of a location in which the wood item is located, measures, using a hygrometer, an ambient humidity of the location, measures, using an ohmmeter, a resistance of the wood item between two metal fasteners used to mount the sensor node to the wood item, determines, based on the resistance, a moisture content of the wood item, and determines, based on the ambient temperature, the ambient humidity, and the moisture content, whether conditions are conducive to pest activity. If conducive, the sensor node uses a microphone that is coupled to the wood item to capture audio data and determine whether the audio data indicates pest activity. If pest activity is detected, the sensor node sends a notification of pest activity, the notification includes the ambient temperature, the ambient humidity, the moisture content, and the audio data.

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 invention discloses a potentiometer calibration method and a related device, and the calibration tool comprises a pedestal platform which is provided with an accommodation groove, and the accommodation groove is used for accommodating a to-be-calibrated potentiometer; the positioning assembly is arranged at the first end of the containing groove and comprises a positioning block and a plurality of positioning grooves, and the positioning block is embedded in one positioning groove and abuts against the head end of the potentiometer to be calibrated; the clamping assembly comprises multiple sets of clamping grooves arranged in the length direction of the containing groove. The contact assembly comprises an ohmmeter, a support and an elastic deformation structure, the ohmmeter is connected with the tail end of the potentiometer to be calibrated, a pressure adjusting interface is formed in the support, and the elastic deformation structure penetrates through the pressure adjusting interface and abuts against a resistance area of the potentiometer to be calibrated. According to the potentiometer calibration method and the related device, through collaborative design of the containing groove and the positioning assembly, it is ensured that the repeatability error of the installation position of the potentiometer is smaller than the threshold value, and the higher positioning precision requirement is met.