19 results about "Acoustic Noise Testing" patented technology

The application discloses a kind of automobile glass lifter assembly oiling load test device, it is related to automobile glass lifter assembly test technical field.The present application includes rack, the middle of the rack is provided with central quick interface, the top of rack is provided with test load, test load can exert load to glass support in automobile glass lifter assembly, the top of test load is provided with oiling mechanism, and oiling mechanism can be applied to sliding plate with lubricating oil;The inside of the rack is provided with ejection mechanism, and switching tool is installed on ejection mechanism.The present application adopts standardization main machine platform design, provides general power and measurement pedestal, and all measurement sensing and execution core are fixed to main machine, and are not affected by product model.Combining oiling procedure with test procedure, oiling mechanism does not need to be set in subsequent noise test shed, oiling and noise test are separated, reduce the influence of mechanism operation on noise, and cost is lower.

The invention provides a noise testing device and a testing system, and belongs to the technical field of automobile braking system testing. According to the noise testing device, a traditional mechanical elastic element is replaced by a closed load cavity and pressurized gas, and axial counter force is directly generated by compressing gas in the cavity when a transmission part stretches out, so that noise introduced by additional structure friction or spring oscillation is thoroughly eliminated while a simulated load is braked; according to the utility model, the noise detection module is arranged, so that a signal received by the noise detection module only comes from a product to be tested, the purity and reliability of a test result are remarkably improved, and by virtue of the characteristic that the gas pressure is continuously adjustable, the same device can be quickly adapted to different load requirements, the overall structure is simplified, and the maintenance and operation cost is reduced.

The utility model relates to the technical field of noise testing equipment, in particular to noise testing equipment convenient for positioning a wall breaking machine, which mainly comprises an equipment main body, a sound insulation cover arranged on the equipment main body, a detector arranged on the equipment main body, a mounting groove arranged on the equipment main body, a wall breaking machine main body arranged on the mounting groove, and a positioning assembly arranged on the equipment main body, the positioning assembly is arranged on the mounting groove and comprises a rotating shaft arranged on the mounting groove. According to the noise testing equipment facilitating positioning of the wall breaking machine, the wall breaking machine body is directly placed in the mounting groove, so that pre-positioning of the wall breaking machine body can be achieved, a connecting plate can be driven to rotate by 90 degrees through the elastic force of a first torsional spring, and therefore a silica gel pad can be matched with the connecting plate; the wall breaking machine main body is fixed in the mounting groove, so that the wall breaking machine main body can be quickly positioned, the wall breaking machine main body can be effectively prevented from shaking in a test, and a detection result is more accurate.

The utility model belongs to the field of car, concretely relates to a new energy vehicle exhaust system structure noise test and objective evaluation device. Noise testing device includes data acquisition system, vibration sensor, microphone, force hammer, test platform and shielded cable connection line, noise objective evaluation device, including data processing unit, matrix operation unit, sound pressure superposition unit and evaluation unit. The utility model has the advantages of simple test equipment, wider test range, more robust test data and more real test results.

The utility model relates to noise test equipment, which comprises a test box, a bearing table and a noise detection assembly, the bearing table is arranged in the test box, and a clamping station for fixing a seat massage structure is formed on the bearing table; the noise detection assembly is arranged in the test box, and the noise detection assembly is provided with a pickup end used for receiving a sound signal; the seat massage structure is placed on the bearing table, the seat massage structure is started, the noise detection assembly can detect noise generated when the seat massage structure works, and therefore whether the operation noise of the seat massage structure meets the requirement or not is judged.

The invention relates to the field of motor noise testing, in particular to a motor concentricity or eccentricity noise testing device which comprises a tool table, a first supporting table, a second supporting table, a magnetic powder brake arranged on the first supporting table and a sensor device arranged on the second supporting table. The magnetic powder brake and the sensor device are matched with a transmission shaft; the first supporting frame is fixed to the workbench, a preset distance is formed between the first supporting frame and the second supporting table, the first supporting frame is provided with a connecting hole, the transmission shaft is fixed to the tool table, one end of the transmission shaft penetrates through the connecting hole and is matched with the sensor device, and the other end of the transmission shaft extends in the direction away from the connecting hole and is matched with a flexible coupler; and a mobile platform. According to the invention, the noise test under the motor concentricity or eccentricity can be realized by effectively utilizing the structure configuration of the motor.

The invention discloses an electric air outlet actuator noise testing tool and method, and the tool comprises a feeding tool, a noise testing mechanism, and a telescoping driving mechanism which is disposed on the noise testing mechanism and is used for driving the feeding tool to horizontally move relative to the noise testing mechanism. The noise testing mechanism is used for carrying out noise testing on products in the feeding jig, and the telescopic driving mechanism is used for driving the feeding jig to move into the noise testing mechanism and remove the noise testing mechanism. The device has the advantages that the feeding jig can be used for testing whether a product runs normally or not, noise in the running process of the product is detected through the noise testing mechanism, the equipment integration degree is high, and the detection efficiency is improved.

The utility model discloses a capacitor noise test box which comprises a box body, a box door hinged to the side wall of the box body, an adjusting assembly arranged at the top of an inner cavity of the box body, a sound receiver arranged at the top of the inner cavity of the box body, and a plurality of vibration reduction assemblies arranged at the bottom of the box body. A motor is turned on to drive a rotating shaft to rotate, so that a winding roller drives a pull rope to wind, then the position of a moving seat is adjusted, noise attenuation data of the capacitor changing along with the distance is conveniently tested, an electric push rod is turned on to drive a connecting plate to move, a clamping block moves to clamp a gear, locking is facilitated, and the capacitor is prevented from sliding down; the box body drives the supporting block to vibrate, buffering and vibration reduction are facilitated through the vibration reduction assembly, and the influence of a sound source caused by external environment vibration on a noise test result is conveniently reduced.

The invention relates to the technical field of diaphragm air pumps, in particular to an integrated tool for quickly testing performance of a diaphragm air pump, which comprises a base, a test board is fixedly connected to the front side of the top of the base, and a sound insulation part is arranged on the rear side of the top of the base. The performance of the diaphragm air pump is rapidly and accurately tested, multiple functions of noise testing, air tightness testing, flow and negative pressure testing and the like are integrated in one tool through integrated design, the testing efficiency is greatly improved, meanwhile, the performance of the diaphragm air pump can be rapidly and accurately tested through motor driving and a gear and rack transmission mechanism, and the performance of the diaphragm air pump can be rapidly and accurately tested. Compared with the prior art, the diaphragm air pump is automatically clamped and fixed, complexity and errors of manual operation are avoided, in addition, interference of external noise on test results is effectively reduced due to the design of the sound insulation shell, accuracy and reliability of test data are ensured, and an operator can conveniently monitor and control the whole test process due to the addition of the control screen.

The utility model relates to the technical field of noise test equipment, concretely is a kind of wall breaking machine noise test equipment, it mainly includes test support frame, the top rear of test support frame is connected with lower cover body, and the top of lower cover body is provided with upper cover body, the inside of lower cover body is provided with wall breaking machine body, the protection assembly includes turnover air cylinder, and the inside of turnover air cylinder is provided with adhesive pad, the front end of turnover air cylinder is provided with elastic connecting rod, the positioning assembly includes fixed plate, and the side of fixed plate is provided with extrusion plate.The wall breaking machine noise test equipment of the application is rotatably connected between lower cover body and upper cover body by turnover air cylinder, the connecting place is sealed and protected by adhesive pad, the tightness of connection is improved, positioning and fixing are carried out by the screwing of convenient dismantling nut after connection, the efficiency of dismounting is improved, and the practicability of test equipment is further improved.

This invention discloses a method for analyzing and judging the compliance of transformer noise, comprising the following steps: energizing the transformer to be tested and inputting test power to form a noise test environment; collecting noise environment data from different locations and sending it to a cloud center; the cloud center preprocessing the noise environment data and, based on mutually independent pre-trained convolutional neural network models, identifying whether the noise environment data collected from different locations meets product performance requirements; and fusing the identification results of the noise environment data from different locations to obtain the final predicted fusion result. Implementing this invention enables automatic testing and analysis of transformer noise, quickly determining its compliance, and improving work efficiency and accuracy.

This utility model relates to a noise testing chamber, including a soundproof enclosure body with an inlet and an outlet on its side wall; a transfer module, which includes a transmission channel composed of multiple electric rollers arranged in a row, the transmission channel passing through the inlet and the outlet, limiting structures on both sides of the transmission channel, and multiple guide rollers on the limiting structures, the multiple guide rollers being arranged above the transmission channel, the rotation axis of the guide rollers being perpendicular to the plane where the multiple electric rollers are located, the multiple guide rollers being distributed along the conveying direction of the transmission channel, and the distance from the multiple guide rollers to the middle of the transmission channel decreasing sequentially; and a testing module disposed inside the soundproof enclosure body. This utility model reduces the workload of operators and improves the efficiency of motor noise detection.

The invention relates to the field of electric pedal noise testing, in particular to an electric pedal noise testing device which comprises two symmetrically-arranged conveying units, the periphery of one conveying unit is covered with a sound insulation room, and a noise detection unit is arranged in the sound insulation room; each conveying unit comprises a supporting table, a set of conveying belts are arranged on the two sides of the supporting table, a conveying plate is conveyed on one set of conveying belts, and a fixing assembly for fixing an electric pedal is arranged on the conveying plate; a window is formed in one side of the sound insulation room; the two conveying units are arranged, the conveying plates and the electric pedals are alternately pushed and received, the electric pedals can be conveyed into the independently-arranged sound insulation room, then noise testing is conducted, the electric pedals are assembled outside the sound insulation room in advance, the electric pedals are subsequently pushed into the sound insulation room along the windows through the conveying units, and the electric pedals are prevented from being carried into the sound insulation room in the period. Therefore, the problem that foreign matters enter or collide with the sound insulation room can be solved, and a good environment can be provided for noise testing.

The invention relates to an in-vehicle noise testing device, and relates to the technical field of noise testing, the in-vehicle noise testing device comprises a testing block, a processor and a support, the testing block is provided with a microphone array in signal connection with the processor, the microphone array is composed of a plurality of microphones and is used for collecting in-vehicle noise, and the support is used for installing the testing block in a vehicle. The processor is used for receiving and processing sound signals of the microphone array, the processor is provided with a sound imaging module, a spectrum analysis module and a data storage module, and the sound imaging module is used for carrying out imaging analysis on sound data collected by the microphone array; the spectrum analysis module is used for analyzing frequency and amplitude distribution of sound collected by the microphone array, and the data storage module is used for storing test data. The method and the device have the effect of improving the comprehensiveness of the in-vehicle noise test.

The invention provides a noise testing method and device for an electronic parking brake caliper, a medium and equipment, and the method comprises the steps: calculating a sound pressure curve of a time window corresponding to a sound pressure signal through employing a set time window length; calculating to obtain a noise stability evaluation index of the to-be-tested brake caliper; if the noise stability evaluation index meets a preset condition, determining a noise amplitude evaluation index of the to-be-tested brake caliper based on the sound pressure curve; fourier transform is carried out on the sound pressure curve to obtain a sound pressure spectrum; determining a noise test result of the to-be-tested brake caliper based on an abnormal sound signal existence state in the sound pressure signal and a noise amplitude evaluation index; the sound pressure signal of the brake caliper is tested, the noise stability evaluation index and the noise amplitude evaluation index are calculated according to the time domain signal, whether the abnormal sound signal exists or not is judged according to the frequency domain signal, and the noise test result of the brake caliper is comprehensively determined by combining the time domain signal and the frequency domain signal, so that the accuracy and authenticity of the noise test of the brake caliper are improved.

The utility model relates to a motor test line body assembly. The assembly comprises a conveying line body main body; the performance test equipment is used for testing the operation performance of the to-be-tested motor; the noise testing equipment is used for testing the noise state of the motor to be tested; the appearance testing equipment is used for detecting the appearance state of the to-be-tested motor; and the control module is used for judging the qualified state of the to-be-detected motor according to the detected operation performance, noise state and appearance state. The main body of the conveying line body is integrated with the high-precision servo positioning module, the multi-channel electrical parameter analyzer is integrated through the performance testing equipment, performance parameters such as resistance, counter electromotive force and inductance of the motor are accurately collected, micron-level detection and abnormal sound frequency spectrum analysis of the motor under specific working conditions can be achieved through the noise testing equipment, and the detection accuracy is improved. Surface defect identification is carried out through the appearance testing equipment, multi-dimensional data fusion analysis can be carried out through the control module to realize quality judgment, the qualification of the motor production process can be effectively monitored, and the qualification rate of the motor is improved.

The invention relates to speed reducer performance testing, and discloses a multifunctional speed reducer performance testing workbench which comprises a speed reducer body and a mounting frame in bolted connection with the bottom of the speed reducer body, and the bottom of the mounting frame is provided with a clamping assembly for reinforcing and buffering the speed reducer body through air bag expansion. The bottom of the clamping assembly is provided with a supporting assembly for changing the mounting position of the clamping assembly through degree-of-freedom adjustment, the clamping assembly comprises a top plate arrayed below the mounting frame, a base plate is arranged below the top plate, an air bag is preset in the base plate, and the air bag is inflated and expanded to cooperate with the clamping assembly, so that the clamping assembly can be clamped in the mounting frame. Flexible fixing and vibration buffering of the speed reducer are achieved; during noise testing, inflation is not needed, the candle is fixed through the elastic piece, the sound vibration visualization principle is combined, the noise level is observed through flame shaking, and integration of vibration stability and noise detection is achieved.

The utility model discloses an automobile seat real-time position vibration noise detection device, which comprises a seat fixing tool, a counterweight mechanism, a lifting mechanism and a noise test mechanism, a seat is fixedly arranged on the seat fixing tool, the counterweight mechanism is arranged at the lifting end of the lifting mechanism and is flexibly connected with the lifting mechanism, and the noise test mechanism is arranged on the seat fixing tool. The lifting mechanism drives the counterweight mechanism to descend to apply a simulation load to the seat; the noise testing mechanism is installed on the counterweight mechanism and synchronously ascends and descends along with the counterweight mechanism, the noise testing mechanism is connected with the counterweight mechanism in a running fit mode, the noise testing mechanism is in running fit with the counterweight mechanism, a PCB sensor for noise detection can be automatically placed, the PCB sensor can synchronously move along with a seat during noise testing, and the noise testing efficiency is improved. Therefore, the noise source is more accurate, and the accuracy of the detection result is ensured.

This utility model discloses a gear transmission noise testing device, comprising a base, a test chamber, an active component, a motor, a sound insulation component, a driven component, and a cover. The test chamber is fixedly mounted on the top of the base, and a first sound insulation plate is fixedly mounted on the inner side of the test chamber. The active component is fixedly mounted on the inner side of the test chamber, and the motor is fixedly mounted on the top of the base, with its output end connected to the active component via a coupling. The sound insulation component abuts against an aluminum cover at the top of the base and a sound insulation felt fixed inside the aluminum cover. The driven component is fixedly mounted on the inner side of the test chamber, and the cover is hinged to the top of the test chamber. A second sound insulation plate is fixedly mounted on the cover. This utility model achieves sound insulation by using the first sound insulation plate, the sound insulation component, and the second sound insulation plate, preventing external noise from affecting the test. Furthermore, the inclusion of the driven component enables adjustability, making it suitable for gears of different sizes and broadening its application range.