31 results about "Immunity Testing" patented technology

The invention discloses a pig foot-and-mouth disease virus O-type broad spectrum multi-epitope recombination antigen and application thereof and belongs to the field of biological vaccines. The pig foot-and-mouth disease virus O-type broad spectrum multi-epitope recombination antigen adopts a strategy of an antigenized antibody, after main antigen epitopes of a plurality of strains of pig foot-and-mouth disease virus O-type are connected in series reasonably, the plurality of strains of pig foot-and-mouth disease virus O-type are coupled with a pig intravenous gamma globulin (IgG) heavy chain constant region to construct the pig foot-and-mouth disease virus O-type broad spectrum multi-epitope recombination antigen, and after ration through a Bio-Rad protein ration kit, the pig foot-and-mouth disease virus O-type broad spectrum multi-epitope recombination antigen and recombination foot-and-mouth disease virus 3D protein are matched to prepare the vaccines. Animal immunity testing results show that the vaccines can stimulate an organism to generate high-titer protective antibodies when the vaccines are used independently or matched with the recombination foot-and-mouth disease virus 3D protein to be used, an antibody level is higher than a national standard, and good application prospects are achieved.

Characteristics of a power MOSFET gate charge test waveform are evaluated to yield a highly reliable and uniform testing methodology that replaces the inconsistent and inefficient dv / dt immunity testing currently performed. The invention utilizes the ratio of QGD over QGS1 to replace traditional dv / dt immunity testing in order to perform binning and sorting the devices. The ratio of QGD over QGS1 has proven to be a very reliable substitute for standard dv / dt immunity tests, and a very accurate predictor of a power MOSFET's suitability for a specified purpose. Because the gate charge parameters are relatively easily measured with high accuracy, and independent of test set-up or tester, reliability is far greater than previous methods and improved efficient results. Additional ratios of charge parameters enhance the performance of the testing methodology of the present invention.

An immunodiagnostic test method includes holding a selection of immunological test elements or consumables in one or more containers attached to or positioned in the analyzer and providing random access to any test element therein. The container can hold multiple types of test elements in compartments or slots. Through sensing of a test element position in its slot, the detection mechanism of the invention provides for random access to multiple types of test elements in any sleeve and within a single sleeve, and provides efficient inventory control. The method increases the number of test element types that may be loaded onto an analyzer and maintains fast determination of inventory.

Provided for in some embodiments is, a method of electromagnetic compatibility multi-carrier immunity testing. The method includes generating a first carrier frequency set including a first plurality of carrier frequencies simultaneously such that a device under test is subjected to the first plurality of carrier frequencies simultaneously. One or more of the first plurality of carrier frequencies is substantially different from other ones of the first plurality of carrier frequencies such that the first plurality of carrier frequencies do not interfere with one another when they are generated simultaneously, and intermodulation products of the first plurality of carrier frequencies are not significant relative to the first plurality of carrier frequencies when the first plurality of carrier frequencies are generated simultaneously.

The invention discloses an electromagnetic immunity testing system building method, which comprises a measurement system, a control system, two pulse high voltage sources and a bounded waveguide transmission line connected in sequence. The testing system building method comprises steps: 1, according to long pulse and short pulse in a theoretical electromagnetic pulse radiation field, technical parameters of a transient electromagnetic field are determined respectively; 2, according to the technical parameters, parameter setting on the bounded waveguide transmission line and the two pulse high voltage sources is carried out; 3, the two pulse high voltage sources are respectively connected with the bounded waveguide transmission line; and 4, whether deviation of technical parameters of an actual electromagnetic pulse radiation field meets design standards is verified. The service life and the environmental adaptability of a tested device can be improved, the cost is saved, the design accuracy is high, the actual system parameter reference value is large, various experimental environments can be configured flexibly, and practicability is strong.

The invention provides a method for preparing an immunity chromatographic test strip for testing cephalosporins antibiotics, and relates to the immunity testing field. The test strip is composed of a sample pad, a combined pad, a cellulose nitrate membrane, a water absorbing pad and a PVC backing; the sample pad, the combined pad, the cellulose nitrate membrane and the water absorbing pad are sequentially stuck to the PVC backing; the combined pad is coated with a group-specific anti-cephalosporins antibiotic antibody colloidal gold label of anti-cephalosporins antibiotics; and the cellulose nitrate membrane is sequentially coated with a cefalexin-OVA test line and a goat anti-rabbit IgG quality control line. The method prepares the test trip by assembling the test preparation of the combination of the group-specific antibody of the anti-cephalosporins antibiotics and the chromogenic colloidal gold, and carries out a multi-residue screening test of the cephalosporins antibiotics with low cost and rapidness; and the portable test strip which can be used for the cephalosporins antibiotic residue tests of different samples is the application of the immunity chromatographic analysis method.

Provided for in some embodiments is, a method of electromagnetic compatibility multi-carrier immunity testing. The method includes generating a first carrier frequency set including a first plurality of carrier frequencies simultaneously such that a device under test is subjected to the first plurality of carrier frequencies simultaneously. One or more of the first plurality of carrier frequencies is substantially different from other ones of the first plurality of carrier frequencies such that the first plurality of carrier frequencies do not interfere with one another when they are generated simultaneously, and intermodulation products of the first plurality of carrier frequencies are not significant relative to the first plurality of carrier frequencies when the first plurality of carrier frequencies are generated simultaneously.

In an immunity test system of the present invention, a boundary point detection device changes a signal level of a transmission signal input to an antenna through a level adjusting device while monitoring an operation of an electronic equipment, and thereby detects a signal level of the transmission signal at a boundary point, at which the electronic equipment is changed from a normal operation state to an abnormal operation state, or vice versa, due to the test wave; and a test result storing device calculates an electric field strength of the test wave at the boundary point by using conversion data based on the signal level of the transmission signal at the boundary point detected by the boundary point detection device, and stores in a storage device a calculation result of the electric field strength as well as a test condition used for obtaining the electric field strength.

The invention provides an electrical fast transient-burst noise immunity testing system under an on-load condition of an electric energy meter. The electrical fast transient-burst noise immunity testing system comprises a single-phase and three-phase voltage-stabilized power supply, an electrical fast transient-burst generation device, an adjustable simulated load device, a single-phase or three-phase to-be-tested electric energy meter (hereinafter referred to as a to-be-tested object), an error checking device, a photoelectric sampling head and a single-phase or three-phase reference electric energy meter (hereinafter referred to as a reference object); the testeetested object in the system and the reference object are identical products. An output end of the single-phase and three-phase voltage-stabilized power supply is connected with the electrical fast transient-burst generation device and the adjustable simulated load device; the output end of the electrical fast transient-burst generation device is connected with the to-be-tested object; the to-be-tested object is connected with the output end of the adjustable simulated load device; photoelectric pulse output of the to-be-tested object is connected (in non-contact) with the photoelectric sampling head of the error checking device; an input end of the reference object is connected with the error checking device; the photoelectric pulse output of reference object is connected (in non-contact) with the photoelectric sampling head of the error checking device. The system can be used for safely and reliably testing; a filtering device does not need to be additionally arranged completely, so that the cost is low; a method is simple and a result is credible.

The invention discloses a system and a method for testing low-frequency radiation immunity of a power line based on crosstalk injection, belongs to the field of electromagnetic compatibility testing methods of electrical and electronic equipment, and aims to solve the problems that a radiation immunity testing method based on a darkroom irradiation method is complex, time-consuming and high in cost, and the radiation efficiency of a low-frequency-band antenna below 1GHz is low. According to the invention, the number of radio frequency interference sources required by a crosstalk injection method is reduced from two to one through a line impedance stabilization network, and the problem of complexity of dual-source cooperative regulation and control is avoided. The radiation immunity test system provided by the invention adopts a near-field crosstalk method, the coupling efficiency is high, expensive equipment such as a microwave anechoic chamber and a broadband radiation antenna is omitted, the time cost and the equipment cost required by the radiation immunity test are saved, and the radiation immunity test system has a better application prospect in the field of electromagnetic compatibility test methods of electrical and electronic equipment.

The embodiment of the invention provides a surge immunity test system, method and device, relates to the technical field of electromagnetic compatibility, and can smoothly complete a testing process of a tolerance degree of power supply equipment (namely tested equipment) with a high alternating-current voltage to surge signals and improve the practicability of surge immunity testing. The method comprises the steps that a voltage dividing device collects a first power parameter of a target loop, wherein the first power parameter includes a voltage amplitude of the target loop and a voltage phase angle of the target loop; the voltage dividing device determines a second power parameter according to the first power parameter, and the second power parameter includes a target voltage amplitudeand a voltage phase angle of the target loop; and under the condition that the voltage dividing device determines that the target voltage amplitude is smaller than or equal to a voltage amplitude threshold value, the voltage dividing device sends the second power parameter to a surge signal generator.

The invention discloses an immunity testing device for electric energy meters. The device comprises a bracket seat, tailstocks and a back plate, wherein the back plate is fixedly arranged on the bracket seat; the tailstocks are fixedly arranged on the back plate; current connection terminals, pulse terminals and voltage connection terminals are arranged on the back plate, and are electrically connected with electric energy meter detection equipment respectively; wiring terminals are arranged on each tailstock, and comprise one or more than one positive wiring terminal, a negative wiring terminal and a voltage wiring terminal; the positive and negative wiring terminals are connected in series; the front positive wiring terminal is connected with a positive current connection terminal, and the tail negative wiring terminal is connected with a negative current connection terminal; the voltage wiring terminals are connected in parallel; a voltage live wire L connection terminal is electrically connected with the front positive wiring terminal, and the voltage wiring terminals are electrically connected with a voltage null line N connection terminal respectively. According to the device, equipment can be more rapidly connected during high-frequency electromagnetic field immunity testing, and the lengths of connecting wires are maximally reduced to reduce high-frequency interference.

The invention relates to an equipment voltage sag immunity testing method and device, computer equipment and a storage medium. Test conditions are set, and the method comprises the following steps: setting parameters, obtaining a tolerable voltage sag residual voltage threshold value and a tolerable residual voltage minimum value corresponding to the to-be-tested equipment by adopting a dichotomy; adjusting the test conditions, obtaining tolerable voltage sag residual voltage thresholds and tolerable residual voltage minimum values corresponding to the to-be-tested equipment under different test conditions, and finally obtaining a voltage sag immunity test result corresponding to the to-be-tested equipment. In the whole process, redundant test points are reduced through the dichotomy, the precision of a test result is ensured, and the equipment voltage sag immunity test can be efficiently and accurately realized.

The invention discloses a pulse immunity automatic test system and a method. The invention belongs to the technical field of pulse immunity testing systems. The system comprises a group pulse signal generator, a power amplifier, a pulse emission probe, a probe clamp, a robot, an industrial camera, a test computer and a tested object, the test computer is bidirectionally connected with the robot and the industrial camera, a test area is positioned by using high resolution of the industrial camera, and each point position of an actual tested area is obtained to schedule the robot to accurately move; the test computer is connected with the group pulse signal generator to control the group pulse signal generator to emit a group pulse interference signal through the pulse emission probe, and aninterference source is manufactured to interfere a tested object. The interference problem caused by the electrical fast pulse signal is tested and analyzed, and an effective means is provided for solving the group pulse interference problem.

A system, such as a magnetic immunity testing system, can include a first coil configured to generate a first magnetic field. The first coil can be disposed on a first side of a scanning volume and can have a first feed for supplying electric current to the first coil. A second coil can be similarly configured on an opposite side of a scanning volume, and a second magnetic field from the second coil can be combined with the first magnetic field to form a combined magnetic field. The coils can be provided with transporters that translate coils in at least one dimension. The system can also include a controller that is configured to control the transporters and the feeds to provide the combined magnetic field as a controlled and calibrated magnetic field over the scanning volume.

The electrostatic discharge immunity testing device provided by the invention is good in safety, good in stability and high in operation flexibility. The electrostatic discharge immunity testing device comprises a rack, a mechanical arm assembly, a feeding assembly and an electrostatic gun. One end of the mechanical arm assembly is rotatably hinged to the top of the rack through a vertical rotating shaft, the other end of the mechanical arm assembly is fixedly connected with the feeding assembly, and the electrostatic gun is arranged on the feeding assembly. The feeding assembly comprises a feeding base, a feeding table, a ball screw, a screw supporting block, a motor and a control box, wherein the feeding table, the ball screw, the screw supporting block, the motor and the control box are arranged on the feeding base. The device can replace actions of arms of testers in a test, avoid too close contact between the testers and tested pieces, ensure that the testers and the tested pieces keep a safe distance, can flexibly change positions and angles, is high in matching degree with the tested pieces with different sizes and shapes, and greatly improves the stability of the whole device. Higher use safety and higher automation degree are realized, and the time for arranging the device by an operator is saved.

Embodiments of the invention provide a cell immunological assay kit used for evaluating the efficacy of a vaccine on the aspect of cell immunology and a method for storing the cell immunological assay kit. Some embodiments of the invention comprise a MHC-restricted viral antigenic peptide. Further, in some embodiments, the kit may use a vaccine research database of clinical trials and samples which are utilized in the therapeutic and conduct comprehensive testing on immune cells secrete cytokines by flow cytometry to establish a cellular immunology evaluation system. The kit may have a good storage stability and, in particular embodiments, the kit may provide a stability that maintains more than 90% of a material stored therein over a year or more.

A system, such as a magnetic immunity testing system, can include a first coil configured to generate a first magnetic field. The first coil can be disposed on a first side of a scanning volume and can have a first feed for supplying electric current to the first coil. A second coil can be similarly configured on an opposite side of a scanning volume, and a second magnetic field from the second coil can be combined with the first magnetic field to form a combined magnetic field. The coils can be provided with transporters that translate coils in at least one dimension. The system can also include a controller that is configured to control the transporters and the feeds to provide the combined magnetic field as a controlled and calibrated magnetic field over the scanning volume.

The invention discloses a test device, method and system for inductive discharge anti-disturbance ability of intelligent equipotential operation equipment. Under the condition of the first arc discharge current; according to the first arc discharge current fitting, to determine the arc discharge current fitting formula; according to the arc discharge current fitting formula, calculate the target intelligent equipotential operation equipment at the preset working voltage, The second arc discharge current under different capacitances to ground and different arc length conditions; calculate the first capacitance according to the maximum second arc discharge current; adjust the capacitance of the adjustable capacitor to be the first capacitance, and adjust the output voltage of the test transformer to be The voltage is preset to conduct an induction discharge immunity test, and the induction discharge immunity of the target intelligent equipotential operation equipment is determined according to the working state of the target intelligent equipotential operation equipment.

The invention discloses an on-chip measurement method and system for electromagnetic immunity of an SRAM. An interference amplitude of an internal power supply Pad is converted into a periodic signal by utilizing the characteristic that the periodicity of a signal of an electromagnetic interference detection module is not influenced by packaging, and the power supply voltage interference amplitude ARFI can be represented by detecting the frequency of the signal. And test vectors of read and write operations of the SRAM can be generated through the function test module, and the disturbed failure condition of the SRAM can be judged. A feedback signal is mainly further provided to control the on-off state of the ring oscillator, the power consumption of the ring oscillator is reduced, reading or writing in different working states of the SRAM is separated for immunity testing, and mutual influence is avoided.

The invention relates to a novel automobile electronic part radio frequency electromagnetic field radiation immunity testing system. The system comprises a signal modulation device used for generatinga modulation signal, a radio frequency switch box, at least two power amplifiers, at least two directional couplers and an antenna, wherein the radio frequency switch box is provided with an input end and at least two output ends; the input end of the radio frequency switch box is connected with the modulation device; frequency ranges corresponding to the output ends one to one are set in the radio frequency switch box; when the frequency of a modulation signal input by the input end is in the frequency ranges, the radio frequency switch box selects the corresponding output end to output themodulation signal; the power amplifiers are connected with the output ends of the radio frequency switch boxes in a one-to-one correspondence mode and used for amplifying the modulation signal and outputting the amplified signal; the directional couplers are correspondingly connected to the output ends of the power amplifiers one to one and used for attenuating the amplified signal and outputtingthe attenuated signal; the antenna is provided with at least two input ends which are connected with the output ends of the directional couplers in a one-to-one correspondence mode, and is used for converting the attenuated signal into electromagnetic waves.

The invention discloses a pig foot-and-mouth disease virus O-type broad spectrum multi-epitope recombination antigen and application thereof and belongs to the field of biological vaccines. The pig foot-and-mouth disease virus O-type broad spectrum multi-epitope recombination antigen adopts a strategy of an antigenized antibody, after main antigen epitopes of a plurality of strains of pig foot-and-mouth disease virus O-type are connected in series reasonably, the plurality of strains of pig foot-and-mouth disease virus O-type are coupled with a pig intravenous gamma globulin (IgG) heavy chain constant region to construct the pig foot-and-mouth disease virus O-type broad spectrum multi-epitope recombination antigen, and after ration through a Bio-Rad protein ration kit, the pig foot-and-mouth disease virus O-type broad spectrum multi-epitope recombination antigen and recombination foot-and-mouth disease virus 3D protein are matched to prepare the vaccines. Animal immunity testing results show that the vaccines can stimulate an organism to generate high-titer protective antibodies when the vaccines are used independently or matched with the recombination foot-and-mouth disease virus 3D protein to be used, an antibody level is higher than a national standard, and good application prospects are achieved.

The invention relates to the technical field of electronic equipment, in particular to an electronic equipment radio frequency electromagnetic field radiation immunity testing device and a using method, the electronic equipment radio frequency electromagnetic field radiation immunity testing device comprises a shell, one end of the shell is slidably connected with a box body, and one side of the shell is provided with a first outlet. According to the device, the wave absorbing plate is coated with gum and clamped into the L-shaped clamping groove, the extraction mechanism at the first outlet is connected with the driving mechanism and keeps a certain distance from the wall surface, then the shell is pushed, the box body is made to move towards the shell through the moving mechanism, and the driving mechanism is started; the pulling-out mechanism at the first outlet pulls the wave-absorbing plate out of the first outlet to be attached to the wall surface, after all the wave-absorbing plates on the wall surface are attached, the pulling-out mechanism in the second outlet is connected with the driving mechanism, the driving mechanism is started, and the pulling-out mechanism at the second outlet pulls the wave-absorbing plate out of the second outlet to be attached to the ceiling. Therefore, a user can quickly arrange a proper anechoic chamber to carry out a radio frequency electromagnetic field radiation immunity test.

The invention discloses an electromagnetic compatibility immunity testing device for control protection equipment. The device comprises an immunity testing signal generator used for outputting an immunity testing signal, a control protection device used for receiving the immunity testing signal, and a real-time simulation device connected with the control protection device and used for providing aworking signal for the control protection device, wherein the working signal port of the control protection device is connected with the working signal port of the real-time simulation device. According to the electromagnetic compatibility immunity testing device of the control protection equipment, the actual working condition of the control protection equipment can be completely reflected, andthe accuracy of electromagnetic compatibility immunity characteristic detection of the control protection equipment is improved.

The invention relates to the technical field of testing, and provides a calibration device for testing the immunity of automobile electronic conduction. A calibration device for automotive electronic conduction immunity testing, including a signal generator, an amplification module, an inductive coupling clamp, a matching module, a measurement module, a transmission module and a tooling fixture, the tooling fixture is used to fix and support the transmission module and is The jig connecting the transmission module and the matching module, the interference signal generation module injects interference current through the inductive coupling clamp, and verifies the induced current generated on the transmission line through magnetic induction coupling. The verification device used for the test of the immunity of automobile electronic conduction can ensure the reliability and stability of the test, has high operability, strong repeatability, is economical, simple and easy to operate, has a simple and stable structure, and saves time and cost. The advantages. The invention also proposes a calibration method for testing the immunity of automobile electronic conduction.

The invention provides an electrical fast transient-burst noise immunity testing system under an on-load condition of an electric energy meter. The electrical fast transient-burst noise immunity testing system comprises a single-phase and three-phase voltage-stabilized power supply, an electrical fast transient-burst generation device, an adjustable simulated load device, a single-phase or three-phase to-be-tested electric energy meter (hereinafter referred to as a to-be-tested object), an error checking device, a photoelectric sampling head and a single-phase or three-phase reference electric energy meter (hereinafter referred to as a reference object); the testeetested object in the system and the reference object are identical products. An output end of the single-phase and three-phase voltage-stabilized power supply is connected with the electrical fast transient-burst generation device and the adjustable simulated load device; the output end of the electrical fast transient-burst generation device is connected with the to-be-tested object; the to-be-tested object is connected with the output end of the adjustable simulated load device; photoelectric pulse output of the to-be-tested object is connected (in non-contact) with the photoelectric sampling head of the error checking device; an input end of the reference object is connected with the error checking device; the photoelectric pulse output of reference object is connected (in non-contact) with the photoelectric sampling head of the error checking device. The system can be used for safely and reliably testing; a filtering device does not need to be additionally arranged completely, so that the cost is low; a method is simple and a result is credible.

The invention provides a magnetic field immunity testing device and method for a magnetic coupling digital isolator, and aims to evaluate the magnetic field immunity of the magnetic coupling digital isolator. A magnetic field generating device provides signals of different frequency bands through an adjustable direct-current power supply, an audio signal source and a radio frequency signal source.The adjustable direct-current power supply is connected with a Helmholtz coil. An audio signal source and a radio frequency signal source are connected with a magnetic field generating device-Helmholtz coil, a radiation ring and a TEM cell through two corresponding power amplifiers, which is used for covering test frequency bands required by different standards. After a signal passes through thepower amplifiers, the signals are applied to a tested device through the magnetic field generation device, the magnetic field intensity value is monitored in real time through the magnetic field detection device, and the output level of the direct-current power supply, an audio signal source or a radio frequency signal source is properly adjusted according to the feedback magnetic field intensityinformation so as to reach the required magnetic field intensity. Through the above arrangement, a user can conveniently and rapidly complete the test of the immunity of the magnetic coupling digitalisolator.

The invention relates to the technical field of signal release, in particular to close-range electric field anti-interference test equipment, which comprises an umbrella-shaped antenna; the adjustable attenuator is connected between the power amplifier and the antenna and is used for adjusting the gain of an output signal of the power amplifier; the power amplifier is connected with the antenna and is used for amplifying a signal; the signal source is connected with the power amplifier and is used for releasing a radio frequency signal; the directional coupler is arranged between the power amplifier and the antenna and is used for coupling a signal to a power meter; the power meter is connected with the directional coupler and is used for detecting the intensity of a signal released by the antenna; and the adjusting system is respectively connected with the power amplifier, the signal source, the directional coupler and the power meter and is used for adjusting the working state of each component. According to the invention, by arranging the umbrella-shaped antenna, the blank of a near-distance electric field immunity testing method for the frequency band of 26-380 MHz in the prior art is filled.