48results about How to "Avoid affecting test accuracy" patented technology

The invention discloses a model testing device for a foundation under the action of dynamic pressure bearing water. The model testing device comprises a model box, an overhead pressing bearing layer, a pressure bearing water pressure adjusting system, a sensor fixing device and a measurement system. The overhead pressing bearing layer is arranged at the bottom of the model box, and the overhead pressing bearing layer is connected with the pressure bearing water pressure adjusting system. The pressure bearing water pressure adjusting system is composed of a mini-type water pressure transformer, an organic glass cylinder device and a flow meter. The organic glass cylinder device communicates with the flow meter, and the height changes of a water column in the organic glass cylinder device is accurately adjusted through the flow meter so that the dynamic changes of the pressure bearing water in the model box can be achieved. The model testing device can simulate the dynamic change process of the pressure bearing water; the water-earth pressure and deformation degree of the foundation under the action of the dynamic water pressure bearing water are measured, and the stress and deformation development rules of the foundation are determined; and the influence of the change amplitude and change rate of the dynamic pressure bearing water on the stability of the foundation is explored, and the effective test data support is provided for research on the foundation problems caused by the action of the dynamic pressure bearing water.

The invention, which belongs to the field of the test sensing element and the manufacturing method thereof, provides a strain test sensing element with matched modulus and a manufacturing method thereof. The sensing element comprises a thin plate arranged at a bottom layer, a sensitive thin film arranged at an intermediate layer, electrodes arranged at the intermediate layer, and an insulating protection film arranged at a top layer. The thin plate arranged at the bottom layer is a plastic or rubber thin plate and is selected and determined based on the modulus of a strain test object. According to the sensitive thin film and the electrodes that are arranged at the intermediate layer, the electrodes are arranged at the two ends of the sensitive thin film; and the sensitive thin film is formed by printing of a conductive macromolecule composite material and the electrodes are formed by printing of conductive silver pastes. The insulating protection film arranged at the top layer is formed by printing of a resin or rubber material. The thin plate at the bottom layer, the sensitive thin film and the electrodes at the intermediate layer, and the insulating protection film at the top layer are selected according to the modulus of the tested object, thereby realizing modulus matching; and then a strain test sensing element is manufactured. Synchronous strain of the sensing element and the tested object can be realized well; the tested strain value becomes accurate; the testing range can be met well; and the test precision is improved. Moreover, the cost is low and the effect is good on the condition of batch production.

The present invention relates to the field of tribological tests. In order to improve the tribological test precision of a rolling bearing, the invention provides a load loading device for a rolling bearing tribological test. The device comprises a support device and a loading mechanism. The support device comprises a base, a rotation shaft support, and a support rotation shaft. The support rotation shaft is installed on the rotation shaft support and is sleeved by a T-shaped support ring and locking nuts. In a test, a rolling bearing is pressed and buckled by the T-shaped support ring, and the locking nuts are locked and fixed at two sides of the rolling bearing. The loading mechanism comprises an electromagnetic iron core and a magnetic conducting ring in a same plane. Two magnetic poles of the electromagnetic iron core face the support rotation shaft from side directions and are in a vertical symmetry at the horizontal diameter of the rolling bearing, magnetic pole end faces are an arc surfaces, and the arc surfaces and the support rotation shaft are concentric. The magnetic conducting ring sleeves the T-shaped support ring, and air gaps are arranged between the magnetic conducting ring and the magnetic pole end faces of the electromagnetic iron core. When the load loading device for a rolling bearing tribological test is used to carry out a rolling bearing friction test, the test precision is high.

The invention discloses a detection system of a sulfur hexafluoride density relay. The detection system having the precise calibration function is capable of calibrating temperature compensation values of multiple groups of density relays once and is capable of recycling sulfur hexafluoride gas. The detection system is composed of a calibration assembly and a high-and-low-temperature test box. Thehigh-and-low-temperature test box consists of a box body, a refrigeration system, a refrigeration system box, a compressor, a control module and an electrical cabinet; the electrical cabinet is arranged at one side of the box body; a control module and a memory are arranged in the electrical cabinet; and a compressor and a refrigeration system are arranged in the refrigeration system box. The boxbody is divided into a test chamber, a return air passage and a refrigeration system box by a lower chamber bottom plate and a test chamber sidewall; a condenser, a heater and a centrifugal fan are arranged in the return air passage; and an air outlet and a return air outlet are formed in the test chamber sidewall. A test frame for supporting density relays and a standard pressure gauge are arranged at a test rack. The calibration assembly includes a controller.

The invention discloses a test device and a test method for simulating a rectangular water head boundary to act on soil. The device comprises a main body cylinder, a data acquirer, a vacuum pump and arectangular water head control system; the main body cylinder comprises a cover plate, a top cylinder segment, a plurality of middle cylinder segments, a bottom cylinder segment and a dolly; and porewater pressure fixers are mounted on the main body cylinder at different heights. The device and the method can be used to simulate the rectangular dynamic continuous change process of confined waterin a foundation, measure and calculate the water and soil pressure and deformation under the action of the rectangular dynamic confined water, dispose relevant test data and determine the bearing, the deformation development rule and other problems of the foundation; and the device and the method can be used to study the influences of the mean value and the amplitude of the change of the rectangular dynamic confined water, provide an effective test data support for studying the foundation problems caused by the rectangular dynamic confined water, and provides a basis for a theoretic analysismodel.

The invention relates to the field of 5G test shielding devices, in particular to a 5G test shielding box which comprises a box body, a rotating structure, a cleaning structure, a sealing structure, awater cooling structure and an anti-blocking structure. By arranging the rotating structure, the ground in the box body can be moved, a cleaning structure is arranged, the ground in the box body canbe comprehensively cleaned, and therefore, dust on the ground in the box body is prevented from influencing the test precision, the cleaning structure can also act on the sealing structure while performing installation work, by adopting seal arrangement, a gap between the cleaning structure and the bottom end of the box body can be filled to increase the sealing effect, the situation that water atthe bottom end of the box body flows out is avoided, normal work of the cleaning structure is guaranteed, it can be kept that water exists at the bottom end of the box body all the time to cool the interior of the box body, and rainwater can be collected and cool the interior of the box body by installing the water cooling structure at the top end of the box body.

The invention belongs to the technical field of electronic component test, and particularly relates to an anode-cathode connector and a connector device for a battery or a capacitor. The connector comprises a metal portion for on detection of an anode and a cathode of the battery or the capacitor, the metal portion is provided with a heat sensor used for detecting heating temperature of the connector, and the heat sensor is embedded, integrated or attached onto the connector. The connector device comprises a fixed frame and a moving frame spaced from the fixed frame, and the battery or capacitor anode-cathode connectors matched mutually are disposed on the fixed frame and the moving frame respectively. By the aid of the heat sensor arranged on the connector, when the battery or the capacitor is tested by test equipment, heat value on the connector can be monitored constantly, and accordingly the connector can be avoided from transferring heat to the battery or the capacitor to affect test precision; moreover, the battery or the capacitor can be protected from damage due to overheating, and product quality of the battery or the capacitor is guaranteed.

The invention discloses lamp radiation intensity test equipment, which comprises a fixed base, the upper end of the fixed base is fixedly connected with two symmetrically arranged telescopic rods, the telescopic ends of the two telescopic rods are jointly and fixedly connected with a movable plate, the upper end of the movable plate is provided with a protective cover, and the protective cover is internally provided with a test device. A cavity is formed in the protective cover, and a fixing plate is arranged above the fixing base. The device is reasonable in structure, light of the lamp is absorbed by arranging the liquid pumping mechanism, light dazzling is avoided, the situation that a worker observes the state of the lamp is affected, when light is weak, a potassium permanganate solution cannot be pumped into the cavity, the protective cover has good light transmission, a detector clearly observes the internal detection condition, next operation is facilitated, and the working efficiency is improved. By arranging the telescopic rod, the content of carbon dioxide in the protective cover during detection is reduced, and the accuracy of detection data is improved.

The invention relates to the technical field of test equipment, in particular to an ash fusibility tester and a standard indicating supporting plate thereof. The standard indicating supporting plate comprises a supporting plate body and a plurality of ash taper holes formed in the front surface of the supporting plate body, wherein the supporting plate body is disc-shaped; the ash taper holes are blind holes in the shapes of regular triangles; the ash taper holes are distributed in the circumference of the supporting plate body in an array manner; at least one position indicating point is arranged on the outer side of one corresponding edge of each ash taper hole, and used for indicating the vertical plane position of one corresponding ash taper to be tested, so that images, of the ash tapers to be tested, shot by a camera device in the testing process can be in consistent with an image preset in a picture recognition system. The accuracy of ash fusibility testing results is improved.

The invention discloses a simple oil consumption tester based on temperature detecting and signal filtering. The simple oil consumption tester is characterized by being composed of a single-chip microcomputer, a voltage-stabilized power supply module, a display, a key board, a wireless transmission unit, a signal filtering unit, a network interface, a temperature detecting unit and an oil consumption sensor connected with signal filtering unit, wherein the voltage-stabilized power supply module, the display, the key board, the wireless transmission unit, the signal filtering unit, the network interface and the temperature detecting unit are connected with the single-chip microcomputer. According to the simple oil consumption tester, external interference signals can be removed through the signal filtering unit, and therefore the influence brought by the interference signals on the detecting precision of the tester are avoided; the machine oil temperature can be detected, and therefore the oil consumption tester can be prevented from being damaged due to the fact that the machine oil temperature is too high.

The invention provides a discharge current testing circuit of a pulse capacitor, a testing device and a testing way. The testing circuit comprises a detection loop and a trigger loop; the detection loop comprises a power supply source for supplying power for a tested capacitor, a trigger tube in parallel connection with the tested capacitor, a current transformer for collecting the discharge current of the tested capacitor, and a current display device connected with the current transformer and used for displaying the current; the trigger loop is connected with the trigger tube, the trigger loop is used for controlling the on-off of the trigger tube, thereby controlling the charging and discharging of the tested capacitor. The charging and discharging of the tested capacitor are controlledby arranging the trigger loop, the current transformer is used for collecting the sensing current, thereby preventing the arc phenomenon from occurring to influence the testing precision; the testingresult is more accurate; and the charging time of the tested capacitor and the number of charging and discharging can be set and monitored by arranging the control panel; the testing circuit is safeand stable, the testing is accurate, and the loop is simple.

The invention discloses a glass biochemical cup and a preparation method thereof. The corners of every two adjacent side faces of the inner wall of the glass biochemical cup and the corners between the side faces and the bottom are shaped like an arc. As the corners in the glass biochemical cup are shaped like an arc, no cleaning blind corners exist and the glass biochemical cup is convenient for cleaning without any test solution residue, thereby avoiding cross contamination to influence test accuracy and avoiding liquid siphon caused by right-angle corners to affect the test accuracy. The existing biochemical cups are produced by bonding a plurality of glass pieces, thus the production efficiency is low and the possibility of errors is high. In the preparation method of the glass biochemical cup, glass tubes are adopted as dies for raw materials, thus the method is simple and easy to operate.

A two-dimensional planar temperature field test sensing element and a manufacturing method thereof belong to the field of sensing element manufacturing methods and test methods. The two-dimensional planar temperature field test sensing element is composed of a film in a first layer, a sensitive element array and transverse electrodes in a second layer, an insulated thin layer in a third layer, longitudinal electrodes in a fourth layer, and an insulated protective film in a fifth layer. The film in the first layer is made of a plastic film material. The second layer includes the sensitive element array and the transverse electrodes which are printed on the film in the first layer by a printing method, wherein the sensitive element array is printed with a conductive polymer composite material, and the transverse electrodes are printed with conductive silver pulp. The insulated thin layer in the third layer is printed with resin. The longitudinal electrodes in the fourth layer are also made by printing. The insulated protective film in the fifth layer is printed with resin. The test sensing element can test a two-dimensional planar temperature field, the test method is simple, the precision is high, and the range of test is met. Meanwhile, the test sensing element can be mass-produced under printing process conditions, is low in cost, and has a good effect.

The invention relates to a slow tensile test method of pipeline steel in a hydrogen environment, belongs to the technical field of pipeline steel testing, and solves the problem that performance testing of the pipeline steel in a high-pressure hydrogen environment is difficult to realize in the prior art. The method comprises the following steps: S1, mounting pipeline steel of a test sample into a hydrogen environment box; S2, filling the pipeline steel in the hydrogen environment box with hydrogen; and S3, connecting the pipeline steel filled with hydrogen into a slow stretching instrument, and carrying out a slow stretching test. Performance testing of the pipeline steel under different hydrogen partial pressure conditions is achieved, the pipeline steel is always in a hydrogen environment in the testing process, and then the testing accuracy is guaranteed.

The invention relates to the technical field of gas sensors, in particular to a high-temperature-resistant gas sensor and a packaging method thereof. The sensor comprises a sensor element and a sleeve, the sensor element is arranged in sleeve, the sensor element comprises a detection end and an electrode end; the detection end of the sensor element is used for gas detection; the electrode end of the sensor element is connected with a wire; a first cavity and a second cavity are formed in the sleeve; a lead device is fixed in the first cavity; the electrode end of the sensor element is in buttjoint with the lead device. A lead connected with the electrode end is led out of the lead device, the second cavity is used for containing the sensor element, a ceramic cake and a ceramic pressing ring are further arranged in the second cavity, the ceramic cake fixes the electrode end of the sensor element in the second cavity, and the ceramic pressing ring fixes the detection end of the sensor element in the second cavity. According to the invention, the sensor element can be fixed, insulated and sealed, has higher high-temperature resistance, and can be used in a high-temperature environment.

The invention discloses a simple oil consumption tester base on temperature detection, and is characterized in that the simple oil consumption tester base on the temperature detection comprises a single chip microcomputer, an oil consumption sensor, a voltage-stabilized power supply module, a display, a keyboard, a wireless transmission unit, a network interface, and a temperature detection unit. The oil consumption sensor, the voltage-stabilized power supply module, the display, the keyboard, the wireless transmission unit, the network interface, and the temperature detection unit are all connected to the single chip microcomputer. The simple oil consumption tester based on the temperature detection can detect the machine oil temperature and prevent the machine oil temperature from becoming over high so as to damage the oil consumption tester.

The invention aims to provide the headset deformation simulation detection equipment which is wide in simulation bending test range and capable of performing positioning compensation during earmuff expansion. The device comprises a rack, a connecting rod fixing module and two sets of earmuff deformation driving modules are arranged on the rack, the two sets of earmuff deformation driving modules are arranged on the two sides of the connecting rod fixing module correspondingly, and each earmuff deformation driving module comprises a floating outward pulling module, a front-back deformation module, a fixed-axis rotating module and an earmuff limiting piece which are connected in sequence; a test data line is arranged on the fixed-axis rotating module of one earmuff deformation driving assembly, the floating outward-pulling module drives the earmuff limiting piece to conduct pitch angle and displacement adjustment, and the front-back deformation module drives the earmuff limiting piece to conduct displacement in the direction perpendicular to the movement direction of the floating outward-pulling module. The fixed-axis rotation module drives the earmuff limiting member to perform fixed-axis rotation, and the test data line is connected with the earphone interface. The invention is applied to the technical field of deformation test equipment.