81 results about "Sensitivity testing" patented technology

The invention discloses a method, equipment and medium for automatically testing the sensitivity of a broadband radio frequency system, and relates to the technical field of broadband radio frequency testing, and the method comprises the steps: starting a testing process, and coordinating a plurality of calibration equipment and equipment to be tested in a wireless network in the same testing time slot, synchronously sampling spectrum data of each calibration device through an air interface and processing the spectrum data into a noise distribution parameter set; and dynamically adjusting the output power of the vector signal generator and synchronously monitoring the bit error rate change according to the received power predicted value until the difference value between the bit error rate and a preset target bit error rate threshold value meets a convergence condition, recording the received power value during convergence as a sensitivity test result, and generating a test report. By generating the high-precision dynamic noise map and calculating the compensation transmitting power calibration value, accurate sensing and active compensation of the space noise of the test environment can be realized.

The invention relates to a multi-frequency sensitivity test evaluation method and system, the evaluation method is realized based on a multi-frequency sensitivity test device, and the device comprises a signal generator, an attenuator, a power amplifier, a directional coupler, a power meter, a frequency spectrograph and an interference applying module. According to the evaluation method, the sensitivity of the electronic product to single-frequency interference and multi-frequency interference in different frequency bands can be determined, modes such as frequency band sub-band division and reverse frequency spectrum monitoring are designed, the influence of multi-frequency-point signal intermodulation interference on a test result can be reduced, and the test accuracy is improved. The problem that the accuracy of a multi-frequency-point sensitivity test result is affected due to the fact that a traditional multi-frequency-point test method generates extra interference risks on the tested electronic product is solved. Meanwhile, under the condition that the multi-frequency sensitivity indication parameter provided by the invention meets a certain condition, a continuous wave sensitivity test method can be adopted to replace a multi-frequency point sensitivity test method, so that the test cost is reduced.

The utility model discloses a rotation sensitivity testing device for a servo turntable. The rotation sensitivity testing device comprises a workbench for installation, a supporting frame stably installed on the left side of the upper end of the workbench and a controller installed on the right side of the upper end of the workbench. The laser measuring mechanism is arranged on the supporting frame, the laser measuring mechanism comprises a first telescopic rod and a laser interferometer host, and the laser interferometer host is arranged at the lower end of the first telescopic rod; a clamping mechanism is arranged in the testing platform, the clamping mechanism comprises a reference axis body, a connecting rod, a threaded rod and a sliding clamping block, and the reference axis body is arranged in the testing platform. The servo turntable rotation sensitivity testing device is convenient for stably testing the rotation sensitivity of the servo turntable, is convenient for adjusting the mounting distance between the servo turntable and the reference shaft according to the size of the rotation center of the servo turntable, avoids detection errors, and is convenient for stably mounting the servo turntable.

This application provides a Saber-based inverter simulation method, which includes: generating an initial simulation test circuit; performing time-domain simulation based on the initial simulation test circuit to obtain the total loss, switching loss, and conduction loss of the power device model; transforming the initial simulation test circuit to obtain a replacement simulation test circuit, and performing sensitivity testing on the obtained replacement simulation test circuit based on the total loss, switching loss, and conduction loss of the power device model to obtain the sensitivity of each initial curve; and adjusting the power device design based on the obtained total loss, switching loss, conduction loss of the power device model, and the sensitivity of each original curve. This method can guide the design of power devices and other parameters in the circuit, effectively improving R&D efficiency and quickly achieving the goals of improving inverter efficiency, reducing losses, and meeting system efficiency requirements.

The utility model relates to the technical field of flexible circuit boards, and discloses a flexible circuit board sensitivity testing device, which comprises a top board assembly, a flexible circuit board, a flexible circuit board, a flexible circuit board, a flexible circuit board, a flexible circuit board, a flexible circuit board and a flexible circuit board connecting piece, and is characterized in that the top board assembly comprises a top board and a positioning and pressing block arranged on the top board; the carrier plate assembly comprises a carrier plate, and the carrier plate is used for bearing and placing a flexible circuit board to be tested; the upper jacking assembly comprises a mounting frame, an upper jacking mechanism, a test module and a loudspeaker device, the test module and the upper jacking mechanism are arranged on the mounting frame, and the loudspeaker device is arranged on the upper jacking mechanism. According to the flexible circuit board sensitivity testing device provided by the utility model, loading, unloading and testing of the to-be-tested flexible circuit board can be flexibly realized, each main part is respectively arranged so that each part can be rapidly replaced and adjusted according to different tested products, and the layout is flexible; in addition, the testing device can meet the operation requirement for testing the sensitivity of the flexible circuit board in a targeted mode, and is simple in structure and low in cost.

This invention relates to the field of performance optimization technology, specifically to a method for polarization sensitivity testing and parameter optimization of a non-polarized liquid crystal focusing lens. The method includes the following steps: collecting test information to establish a basic driving condition set; collecting light field interference fringe images to generate a phase delay matrix set; subtracting the elements of the phase matrix to obtain a deformation stress distribution matrix; determining the numerical magnitude relationship to obtain a stress over-limit judgment and characterization set; and adjusting the voltage specifications to generate a set of independent dual-layer adjustment commands. In this invention, basic driving conditions are established by extracting allowable stress and interlayer elastic parameters; the light intensity distribution is analyzed and the phase state is compared to extract deformation; global characterization scalars are calculated to determine over-limit actions; pulse width voltage is readjusted to issue commands; and based on full-aperture interferometry and dual-layer differential comparison, interlayer coupling stress is quantified and perceived, constructing a dynamic adjustment closed loop for polarization response fluctuations and rotational deviations.

The application discloses a kind of milligram level to sub-milligram level energetic material sensitivity test system and method, belong to material testing field.For the problem of large consumption of existing energetic material test sample and high error rate of result, the application provides a kind of milligram level to sub-milligram level energetic material sensitivity test system, including the pressure loading module of dynamic pressure applied to energetic sample, at least two different wavelengths of light are collected, and the common optical path module of different functional components in functional component module is separated to different wavelengths of light path, the functional component module of in-situ observation structure evolution and reaction phenomenon of energetic sample under pressure loading;Ensure the time synchronization of pressure loading module, common optical path module and functional component module when working Synchronous control module.The application realizes the precision measurement of milligram level to sub-milligram level energetic material sensitivity, and the test result is objective and has high repeatability, which provides a powerful means for rapid and safe evaluation and initiation mechanism research of new energetic material.

The application provides a radio station sensitivity test auxiliary device and a use method thereof. The auxiliary device comprises a first access unit, a second access unit, a control unit, a mixing unit, a local oscillator unit, a first switch unit and a second switch unit. Two kinds of communication modes are included between the first switch unit and the second switch unit. The first communication mode is to directly connect the first switch unit and the second switch unit, and the second communication mode is to connect the first switch unit and the second switch unit through the mixing unit. The control unit is connected with the first switch unit, the second switch unit, the first access unit, the second access unit and the local oscillator unit, and is used for switching the communication mode of the first switch unit and the second switch unit to realize the switching of the test mode, setting the attenuation values of the first access unit and the second access unit and setting the frequency value of the local oscillator signal. The radio station sensitivity test auxiliary device is used for radio station sensitivity test, and four kinds of test modes are included.

Contemplated test kits, diagnostic apparatus and methods using same for food sensitivity are based on rational-based selection of food preparations with established discriminatory p-value. Kits and diagnostic apparatus include those with a minimum number of food preparations that have an average discriminatory p-value of ≤0.07 as determined by their raw p-value or an average discriminatory p-value of ≤0.10 as determined by FDR multiplicity adjusted p-value. In further contemplated aspects, compositions and methods for food sensitivity are also stratified by gender to further enhance predictive value.

The utility model discloses a sensitivity testing machine for a constant-temperature shower, and relates to the technical field of shower testing. The sensitivity testing machine of the constant-temperature shower comprises a testing machine table and a constant-temperature faucet body, an installation frame is fixed to the rear side of the top of the testing machine table, a water inlet pipe is embedded in the installation frame and communicated with a water inlet of the constant-temperature faucet body, a supporting shaft is rotationally arranged on the installation frame, a supporting plate is fixed to the front end of the supporting shaft, and a transparent measuring cup is arranged on the supporting plate. A reciprocating screw rod is arranged on the upper side of the testing machine table, a movable block is arranged on the reciprocating screw rod in a threaded mode, a connecting rod is fixed to the front end of the movable block, an induction plate is fixed to the upper end of the connecting rod, and a turnover mechanism is arranged between the movable block and the supporting shaft. And in combination with the turnover mechanism, the purpose of continuously testing the sensitivity of the constant-temperature faucet body is achieved.

The present application relates to the technical field of magnetic head production, and particularly relates to a magnetic head sensitivity test device, which comprises a table top, a lead screw and a supporting rod arranged above the table top, the lead screw is driven to rotate by a conveying motor, a sliding table is further arranged above the table top, a plurality of threaded pipes are fixed on the sliding table, the lead screw passes through the threaded pipes and is threadedly connected with the threaded pipes, a supporting pipe is further fixed on the sliding table, the supporting rod passes through the supporting pipe and is slidably connected with the supporting pipe, a plurality of placing grooves are further arranged on the sliding table, a plurality of jacks are uniformly arranged in the placing grooves, a fixing seat is further fixed on the bottom of one side of the sliding table, a conductive needle electrically connected with the jacks is arranged on the fixing seat, a plurality of test air cylinders are further fixed on the table top, a fixing plate is further arranged on one side of the table top, the piston rods of the test air cylinders are all fixed with the fixing plate, and a positioning plate is further arranged on one side of the fixing plate. The device can realize automatic sensitivity test of the magnetic head.

The present application relates to the technical field of safety light curtain calibration test, and specifically relates to a multi-channel safety light curtain synchronous calibration and sensitivity test method, which comprises the following steps: setting up a multi-channel safety light curtain, modulating a test signal and emitting an infrared light beam from a light emitter of each channel of the multi-channel safety light curtain, and obtaining a response signal of a light receiver of each channel; regarding an arbitrary channel as a target channel, performing time domain and frequency domain analysis on the test signal and the response signal, extracting a response delay parameter and a signal attenuation degree of the target channel, and then obtaining a time-frequency coefficient of the target channel in combination with the response delay parameter and the signal attenuation degree; obtaining running scene information of the multi-channel safety light curtain, obtaining a sensitivity threshold of the target channel through the time-frequency coefficient and the running scene information, and performing sensitivity calibration on the multi-channel safety light curtain based on the sensitivity threshold. The present application improves the calibration efficiency and test precision of the multi-channel safety light curtain.

The invention belongs to the technical field of touch performance analysis, and provides a touch performance analysis method and system suitable for touch display glass, and the method comprises the steps: carrying out the grid form division of the touch display glass according to the same area, and obtaining a plurality of touch test regions, the method comprises the following steps: performing multiple touch performance tests on touch display glass on a touch test area, evaluating a mistaken touch risk of the touch test area, and identifying an area with a high mistaken touch risk and an area with a low mistaken touch risk in the touch test area; by performing multiple sensitivity tests on the area with the low mistaken touch risk, evaluating the touch sensitivity in the area with the low mistaken touch risk and identifying the area with the low sensitivity in the area with the low mistaken touch risk, the problem areas are classified according to the similarity between the sensitivity deviation and the mistaken touch rate deviation, the touch pressure intervals are adjusted according to different clusters, and the accuracy of the mistaken touch risk is improved. And an optimal pressure value for balancing the two pressure values is searched through compatibility analysis.

The invention discloses a CRISPR (clustered regularly interspaced short palindromic repeats)-based method for detecting eDNA (deoxyribonucleic acid) of a dolphin sinensis in seawater, which comprises the following steps: firstly, extracting muscle tissue DNA of the dolphin sinensis and five related species, and carrying out target tissue acquisition to obtain a target DNA sample; establishing an RPA reaction system, performing an RPA amplification reaction according to the target DNA sample, and screening out an RPA primer pair capable of specifically amplifying the COI gene segment of the dolphin chinensis; establishing a crRNA screening reaction system, preparing in a PCR (Polymerase Chain Reaction) tube, and collecting a fluorescence signal of an FAM channel through a qPCR instrument for crRNA screening; and carrying out sensitivity test and specificity test based on the screened RPA primer pair and crRNA, and selecting an optimal detection combination. The detection time is further shortened, the operation difficulty is reduced, the requirement is low, and the sensitivity and the accuracy are relatively high.

The invention discloses a receiving sensitivity testing method and system based on a Bluetooth HCI command and conduction isolation, and relates to the technical field of wireless communication testing. The method comprises the following steps: constructing an electromagnetic shielding test environment, and carrying out system calibration in the test environment to obtain a power calibration value and an inherent loss value; measuring background noise power of each channel, and determining an optimal test channel and a power compensation factor in combination with a reference noise threshold; according to the Bluetooth communication protocol physical layer parameters and the target packet error rate, determining the number of theoretical transmitted data packets, and calculating a judgment threshold of the number of successfully received data packets; searching a critical attenuation value, iteratively adjusting the attenuation value of the programmable attenuator according to a judgment threshold value, and adjusting an attenuation step value according to the change rate of the number of successfully received data packets; and calculating the final receiving sensitivity based on the power calibration value, the inherent loss value, the critical attenuation value and the power compensation factor. By optimizing electromagnetic shielding, channel selection and three-stage scanning, the accuracy of receiving sensitivity testing is improved.

Contemplated test kits and methods for food sensitivity related to osteoarthritis are based on rational-based selection of food preparations with established discriminatory p-value. In some embodiments, kits include those with a minimum number of food preparations that have an average discriminatory p-value of ≤0.07 as determined by their raw p-value or an average discriminatory p-value of ≤0.10 as determined by FDR multiplicity adjusted p-value. In further contemplated aspects, compositions and methods for food sensitivity are also stratified by gender to further enhance predictive value.

The invention relates to the technical field related to intelligent sensors, in particular to an intelligent induction type sensitivity testing device of a temperature static penetrometer and a testing method thereof.The intelligent induction type sensitivity testing device comprises a workbench and a loading frame movably arranged above the workbench and used for installing a penetrometer to be tested, and further comprises a cylinder fixed to the workbench; a cloth bag for containing a soil sample is arranged in the cylinder, the bottom end of the cloth bag is connected with a first traction mechanism arranged at the bottom of the cylinder, a plurality of connecting parts distributed at equal intervals along the circumference are formed at the upper end of the cloth bag, and the plurality of connecting parts are respectively connected with a group of second traction mechanisms; the arc-shaped pieces are movably arranged in the cylinder and distributed at equal intervals along the circumference, and each arc-shaped piece is connected with a pressure applying mechanism arranged on the cylinder; through uniform pressure application and dynamic resistance adjustment, the accuracy and reliability of the test can be improved, the flexibility of the test and the richness of data are realized, and more comprehensive data support is provided for performance evaluation and optimization of the temperature static penetrometer.

The invention discloses a radio stop sensitivity test method, device and equipment, and the method comprises the steps: receiving a test instruction, transmitting an initialization instruction to a vehicle terminal, and transmitting an initial transmission instruction to a signal generator; judging the program signal according to the test instruction to obtain a stop judgment result, and performing accumulation judgment on the stop judgment result according to a frequency judgment rule to obtain a frequency judgment result; if the frequency judgment result is met, obtaining a sensitivity test value corresponding to the current stop state as a test result; and if the frequency judgment result is not met, judging whether a signal strength adjustment condition is met, if the signal strength adjustment condition is met, sending a signal strength adjustment instruction to the signal generator and carrying out stop judgment again, and if the signal strength adjustment condition is not met, directly carrying out stop judgment again. According to the radio stop sensitivity test method, the signal strength of the radio signal can be automatically adjusted based on corresponding judgment, and the stop test result can be accurately and efficiently obtained.

Contemplated test kits and methods for food sensitivity are based on rational-based selection of food preparations with established discriminatory p-value. Particularly preferred kits include those with a minimum number of food preparations that have an average discriminatory p-value of ≤0.07 as determined by their raw p-value or an average discriminatory p-value of ≤0.10 as determined by FDR multiplicity adjusted p-value. In further contemplated aspects, compositions and methods for food sensitivity are also stratified by gender to further enhance predictive value.

The utility model relates to a detector sensitivity detection device convenient to replace gas cylinder relates to the technical field of detector sensitivity detection technique, especially is a kind of detector sensitivity detection device convenient to replace gas cylinder, it include: support part, detection part and connecting mechanism, detection part is installed on support part, when detection part senses detector, detection part sprays detection instrument, to detect the sensitivity of detector, connecting mechanism includes: connecting block and clamping block, connecting block is installed on detection part, clamping block is installed on support part, when connecting block is connected with clamping block, detection part is installed on support part, when connecting block is not connected with clamping block, detection part is detached from support part.The utility model is connected by the detachable connection mode of support part and detection part, can replace different detection part according to different types of detector, so, without equipping support part for each type of detector, reduce the use cost of whole detection device by reducing support part.

The invention discloses a dual-mode tracking sensitivity test method for a global satellite navigation system of a whole vehicle. The method comprises the following steps: constructing a test environment; performing three-dimensional radiation pattern scanning, and improving data reliability through median filtering and continuous stability criterion; intelligently screening key test angles based on a directional diagram; a radiation tracking sensitivity test is carried out at a key angle; and finally synthesizing full-angle sensitivity distribution. Synchronous testing and mutual interference quantification of L1 and L5 dual-band signals are achieved, the testing efficiency and the data accuracy are remarkably improved, and the method is suitable for whole vehicle GNSS performance verification, OTA testing and antenna design optimization.

The invention provides a full-link coverage airborne integrated communication navigation identification equipment detection method and system. According to the method, equipment functions are divided into an external communication radiation signal type function and an external signal receiving processing type function, and a transmitting path and a receiving path are constructed respectively. According to test requirements, the equipment and the signal receiver or the signal generator are controlled to enter a transceiving state with a specified function, and received signals are analyzed or measured, so that the performance of the equipment is judged. The detection system comprises airborne integrated communication navigation identification equipment, a signal transceiving unit and a control unit, and can meet various test requirements of a transmitting link, a receiving link, a power test, a sensitivity test and the like. The system is further provided with a man-machine interaction interface, so that operation and test result display are facilitated. According to the method, the full-link function of the equipment can be fully covered, the detection efficiency and accuracy are improved, the maintenance cost is reduced, the flight safety is improved, and the method has remarkable practical value and wide application prospect.

The invention relates to the technical field of optical fiber detection, and provides a high-sensitivity and high-stability optical fiber photon darkening performance test system and method.The system comprises a light source assembly used for generating single-mode pump light and probe light, the single-mode pump light is used for exciting an optical fiber to be tested, and the probe light is used for detecting loss changes of the optical fiber to be tested; the optical coupling module is connected between the light source assembly and the to-be-detected optical fiber and used for combining the single-mode pump light and the detection light and coupling the combined light into a fiber core of the to-be-detected optical fiber; and the detection module is used for receiving the light output from the to-be-detected optical fiber and measuring the power change of the detection light according to the light output from the to-be-detected optical fiber, and the power change is used for representing the photon darkening performance of the to-be-detected optical fiber. The optical fiber photon darkening performance test system provided by the invention is simple in structure, low in power, all-fiber and high in test stability, and can be flexibly adapted to large-mode-field optical fibers with different cladding diameters and perform high-stability and high-sensitivity tests.

A virtual reality (VR) system can be implemented for evaluating color wavelength sensitivity. The system can use an electronic device featuring a head-mounted display (HMD) and eye-tracking sensors. The system can generate a VR user interface that creates a three-dimensional virtual environment, rendered on the HMD. Within this virtual space, the system can simulate a variety of color wavelength tasks. As users engage with these tasks, the eye-tracking sensors can continuously monitor responses to the simulated tasks. The system can then analyze the tracked data for color wavelength sensitivity performance.

The embodiment of the application discloses a high-temperature online monitoring sensitivity test method and system for HT700P pipelines. The method comprises the following steps: preparing a plurality of test samples, the plurality of test samples are made of HT700P material and have pre-prepared crack defects; configuring an electrode array for each test sample, the electrode array is installed on the corresponding test sample and measured by using a four-probe method configuration, each four-probe method configuration comprises two current electrodes and two voltage electrodes, and is used for realizing the separation of current injection and voltage measurement; sequentially placing the plurality of test samples in a high-temperature environment for online micro-resistance measurement, the temperature of the high-temperature environment is not lower than 650 DEG C, and the high-temperature environment is used for simulating the operating condition of a high-temperature steam pipeline; for each test sample, a constant current is applied through the corresponding electrode array, a corresponding voltage value is measured, and a micro-resistance value of the test sample is calculated; and based on a plurality of micro-resistance values and corresponding crack defect depths, the measurement sensitivity of the crack defect depth is analyzed.

The invention discloses an ultrasonic C scanning detection method, device and equipment for a variable-thickness workpiece and a medium, and relates to the technical field of ultrasonic nondestructive detection. The method comprises the following steps: carrying out sensitivity testing on test blocks with different thicknesses to obtain a sensitivity-thickness curve; performing ultrasonic C scanning on the to-be-measured variable-thickness workpiece through the probe to obtain original pre-scanning data; obtaining a two-dimensional profile image and a three-dimensional image of the variable-thickness workpiece based on the pre-scanning data so as to obtain geometric shape and thickness distribution data of the workpiece; the variable-thickness position indicates the movement position of the probe and controls the probe to move at the variable-thickness position, so that the probe is focused on the surface of the workpiece in real time; changing the gain of the pulse transmitter according to a sensitivity-thickness curve in different thickness regions; and carrying out secondary ultrasonic C scanning on the to-be-detected variable-thickness workpiece to obtain original scanning data, and obtaining defect imaging and bottom wave imaging to evaluate defects. The method can accurately detect the defects of the variable-thickness workpiece.

The utility model provides an earphone microphone sensitivity compensation calibration system and a sensitivity test device.The system comprises a main control module, a sound card power amplifier module, a sensitivity test module and an earphone module, and the main control module is provided with an acquisition unit, a comparison calculation unit, a gain setting unit and a sending unit; the acquisition unit is used for acquiring gain values of a main microphone and an auxiliary microphone of the to-be-tested earphone, so that the gain values of the main microphone and the auxiliary microphone of the to-be-tested earphone are respectively marked as a first gain value and a second gain value; the comparison calculation unit is used for comparing whether the first gain value is in a first gain value interval and whether the second gain value is in a second gain value interval. When the obtained gain value is out of the corresponding range, the absolute difference value between the gain value and the upper limit of the gain value in the corresponding range is obtained, and the difference value is written into the chip of the earphone to be tested, so that the sensitivity value calibrated last is used as the reference value in the subsequent earphone test, and the requirement of batch test can be met.

The invention relates to the technical field of wireless testing, in particular to an antenna radiation sensitivity testing method and device, terminal equipment and a storage medium. The method comprises the steps that a radio frequency interface of a tested device is connected with a first output port of a radio frequency power divider, an input port of the radio frequency power divider is connected with a radio frequency port of a wireless comprehensive tester, and a second output port of the radio frequency power divider is externally connected with a matched load; traversing all target wireless channels, and measuring and recording the conduction sensitivity of the tested equipment under each channel as the reference sensitivity; the second output port is changed to be connected with a matched antenna, a low-noise amplifier is connected between the matched antenna and the radio frequency power divider in series, and the gain of the low-noise amplifier is equal to the insertion loss of the radio frequency power divider; traversing all target wireless channels, and measuring and recording the equivalent radiation sensitivity of the tested equipment under each channel; and calculating the difference between the reference sensitivity and the equivalent radiation sensitivity under the same channel to obtain the radiation sensitivity deterioration degree of the tested equipment.

The invention discloses a system and a method for testing sensitivity of energetic materials from milligram level to sub-milligram level, and belongs to the field of material testing. Aiming at the problems of high sample consumption and high result error rate of the existing energetic material test, the invention provides a sensitivity test system for a milligram-grade to sub-milligram-grade energetic material, which comprises a pressure loading module for applying dynamic pressure to an energetic sample, collecting light with at least two different wavelengths, and determining the sensitivity of the energetic material. The public light path module is used for receiving light paths with different wavelengths and separating the light paths with different wavelengths to different functional components in the functional component module; the functional component module is used for in-situ observation of structural evolution and reaction phenomena of an energetic sample under pressure loading; and the synchronous control module is used for ensuring time synchronism when the pressure loading module, the public light path module and the functional component module work. According to the method, accurate measurement of the sensitivity of the energetic material in milligram and even sub-milligram levels is realized, the test result is objective, the repeatability is high, and a powerful means is provided for rapid safety evaluation and detonation mechanism research of the novel energetic material.

The utility model belongs to the technical field of microphone production equipment, and particularly relates to a microphone sensitivity testing device which comprises a base and a testing assembly arranged on the base. The testing assembly comprises a limiting plate adjustably arranged on the base, a testing mechanism and a discharging mechanism, wherein the testing mechanism and the discharging mechanism are symmetrically installed on the two sides of the limiting plate. The testing mechanism comprises a testing terminal installed on the side of the limiting plate, a protection pad arranged at the end of the testing terminal and a testing machine connected to the testing terminal. According to the utility model, through the test assembly, the electric telescopic rod can be utilized to drive the push block to move in the connecting cylinder, then the microphone passing through the limiting plate is pushed to the test terminal, the microphone is tested by the test machine after being connected with the test terminal, and the suction cup is controlled by the air pump to adsorb the microphone after the test is unqualified. And then the microphones are dragged to the second base plate and discharged along the discharging plate, automatic screening of defective products is achieved, and practicability is high.