3518results about How to "Test accurate" patented technology

The invention relates to the technical field of bearing testing, in particular to a bearing integrated dynamic performance test device and method. The bearing integrated dynamic performance test device comprises a drive system, a transmission system, a measurement and control system, an environmental simulation system and a mechanical body structure. A motor is adopted by the drive system for driving. The measurement and control system controls the rotation speed of the motor. The transmission system is in a belt transmission mode or a coupler transmission mode. The measurement and control system is provided with a force sensor, a strainmeter, an eddy current transducer, a rotation speed sensor, a laser displacement sensor, a temperature sensor, a magnetic oil residue sensor, a pressure sensor, a flow sensor, an oil temperature sensor, an acceleration sensor and other related sensors used for bearing testing. The control system is driven in a servo mode, and is composed of a frequency converter, a hydraulic solenoid valve, a heating controller, a flow control device and a pressure control device. The environmental simulation system is adopted for simulating a real bearing testing working condition, and the performance and service life testing of the real bearing testing working condition is achieved.

The invention relates to the solar photovoltaic device detection technique, in particular to an LED solar simulator which can simulate the AM 1.5 standard solar spectrum and can be used for testing the generating efficiency of a solar battery or a small-sized photovoltaic component at a temperature of 25 DEG C and in the irradiation of the AM1.5 standard sun. The LED solar simulator adopts LEDs with various colors, ensures that the total combined spectrum has a range covering the solar spectrum from the near infrared to the near ultraviolet, the light intensity of various wave bands of the solar spectrum is adjusted by adjusting the number of the LEDs and the current intensity of the LEDs to realize the whole simulation of the solar spectrum. The total number of the LEDs is adjusted to satisfy the requirement of the solar simulation of a laboratory in order to realize the synthesis of the AM1.5 standard sunshine the optical radiation intensity of which is 1000W/m<2>.

The present invention provides methods and systems for evaluating biological materials for the diagnosis of disease, such as gland abnormalities, and the cancerous and precancerous conditions. Nonlinear optical microscopy techniques, such as MP microscopy and harmonic generation microscopy, are used to generate high resolution, three dimensional images of a test tissue, such as a biopsy tissue sample and tissue in whole organisms, that are analyzed, optionally in combination, to detect, identify and characterize tumor-associated collagen signatures. The presence, abundance and extent of histological features and structural motifs comprising tumor-associated collagen signatures may be directly and accurately correlated with the onset and progression of cancer, such as breast cancer. The present methods are capable of providing an accurate and selective diagnosis of cancer, and provide diagnostic information complementary to conventional diagnostic methods.

Provided is a microfluidic device. The microfluidic device includes a sample storage chamber storing sample fluid therein, a detection chamber connected to the sample storage chamber and detecting a specific material of the sample fluid, a cleaning liquid storage chamber connected to the detection chamber and storing cleaning liquid therein, a plurality of fluid passages interconnecting the chambers, and a micropump transferring the cleaning liquid. The microfluidic device precisely inspects a sample fluid although a small amount of the sample fluid flows.

A system abstracts channel information from field data gathered in actual wireless communication system environments. The abstracted data is then transformed into control signals or programming codes that can be used to control channel simulators so as to recreate the field conditions, including path loss, slow fading, fast fading, path delay, fading power spectral density with and without line-of-sight (LOS), and different kind of handoff scenarios, such as soft, softer, intra-band hard, inter-band hard handoffs. The system thus can accurately simulate a realistic wireless communication link originated from multiple signal sources in different band channels and formed by multipath signal propagation. The simulated realistic wireless communication link can be condensed by selecting the most useful scenarios from its original field data files or modified by tuning its parameters as desired.

In an embodiment, the claimed invention includes an oral-fluid collection and testing device that. is simple to operate. The device includes a body assembly and a cap assembly that are easy to handle by a user. A collection sponge projects from an end of the body assembly for absorbing the oral fluid of a donor, A cap assembly is easily aligned with the body assembly by way of visual alignment indicators on both the body and the cap. Once the cap is aligned with the body, a user simply pushes the cap onto the 'body, which causes a first stage fluid, flow. More specifically, a buffer fluid is released from the cap and mixes with the oral fluid collected on the sponge—After waiting a short time* the cap is rotated, then pushed again, causing a second-stage fluid flow in which the sponge is compressed such that the buffer fluid/oral fluid exits the sponge and flows toward a. pair of test strips. A user can then easily view the test results by observing a visual indication, such as a color change of the test strips through a viewing window.

An interface circuit includes: a first synchronizing circuit for synchronizing a signal having a delay equal to or more than a predetermined period with respect to a reference clock, with the reference clock; a second synchronizing circuit for synchronizing a signal having a delay less than the predetermined period with respect to the reference clock, with the reference clock; a delay determining circuit for outputting a determination signal based on a delay of the signal relative to the reference clock; a delay determination setting circuit for outputting a path setting signal that designates an output value of one of the first synchronizing circuit and the second synchronizing circuit based on a preset value; and a delay selecting circuit for selecting and outputting an output value of one of the first synchronizing circuit and the second synchronizing circuit based on one of the determination signal and the path setting signal.

The invention disclosed herein provides a subsonic wind tunnel capable for accurately maintaining a desired Mach number, pressure and temperature for use in aerothermal testing of materials. The invention allows the Mach number to be precisely controlled in the test section of the wind tunnel by employing a restricted outlet acting as a sonic throat for the wind tunnel. In the preferred embodiment, the restricted outlet is constructed to be variable in cross sectional area allowing a range of Mach numbers to be tested. The variable outlet is varied during the operation of the wind tunnel so that an actual trajectory with changing Mach numbers, pressure, and temperature is simulated.

The invention discloses material fluid deformation disturbance effect experimental system and method. It includes dead load loading system realized by loading system, crankshaft force enlarging device, and force transmission connecting rod, disturbance loading system realized by impact and blasting disturbance loading devices, confining pressure loading system realized by tri-axial pressure tank includes closed box set ring capsule. The material fluid deformation disturbance effect experimental system can realize uniaxial and tri-axial fluid deformation experiences, uniaxial and tri-axial fluid deformation disturbance experiments for the testing specimen. It has the advantages of simple structure, low cost, precise testing, suiting for various materials testing specimen to do fluid deformation disturbance experiment, especially for rock testing specimen.

Data pad regions are arranged in four divided regions of a semiconductor memory chip of a rectangular shape, respectively, and data pads are selectively utilized in each of the four divided regions in accordance with a word structure. Thus, it is possible to implement a semiconductor memory chip capable of being assembled in both a single chip package and a multi chip package.

Systems, methods and computer-executable instructions for testing computer programs are provided. A computer program (application under test—AUT) is analyzed and data records are created for each user interface object of each screen of the AUT. The data records form a dataset which may be copied and edited to define a series of test functions to be performed on the AUT. Corresponding test code is provided to perform the test functions, the test code referencing the data records of the dataset.

The invention relates to system and method for testing the basic performance of an unmanned vehicle. The unmanned vehicle is an automobile rebuilt in chassis, and the chassis is provided with a control system. According to the method, the chassis control system performs reliability testing on the functions, namely electric control steering capacity, electric control speed regulation capacity, electric control braking and the like, of the unmanned vehicle and performs safety testing on the vehicle performance, so that whether the hardware condition of the unmanned vehicle is achieved is ensured, and the use safety of the unmanned vehicle is ensured.

A test sheet is set in a droplet discharge device at a first distance. At least one droplet is discharged toward the test sheet from a nozzle formed in the droplet discharge device to form at least one first dot on the test sheet. The test sheet is set in the droplet discharge device at a second distance differing from the first distance. At least one droplet is discharged toward the test sheet from the nozzle to form at least one second dot on the test sheet. A nozzle position error or a nozzle discharge angle error are calculated from the position of the first dot, the position of the second dot, the first distance, and the second distance. Testing inkjet heads in this manner allows accurate testing for errors in nozzle position or discharge angle.

A diagnostic system and method for evaluating one or more phonological awareness, phonological processing and reading skills of an individual to detect phonological awareness, phonological processing and reading skill deficiencies in the individual so that the risk of developing a reading deficiency is reduced and existing reading deficiencies are remediated. The system may use graphical games to test the individual's ability in a plurality of different phonological awareness, phonological processing and reading skills. The system may use speech recognition technology to interact with the games. The system may include a module for providing motivation to a user of the system being tested.

There are provided an image processing method and an image processor for detecting an object to be detected in a simple and accurate manner without detailed adjustment of illumination. Light sources provided in four directions around a camera are sequentially lighted, and a camera is driven every time the one of the light sources is lighted to generate four images of a work. Further, a normal vector of a group of pixels having the same coordinate among the generated images is calculated by use of brightness of each pixel that belongs to the group and a previously obtained illumination direction vector corresponding to each of the light sources. Moreover, the normal vector of each pixel is converted into one-dimensional information showing a relation of the vector with respect to a space coordinate system, and after generation of an image representing the calculation result, a prescribed characteristic extracting process is executed.

This invention provides a test method for one cavity multiple modes broad-band multiple points microwave medium multiple dielectric constants. By designing and producing a "clean" multiple frequency points, high Q cylindrical test resonance chamber of broad band and internal mould type, the method finishes identifying each target mode in the hollow resonator, thereto obtain the equivalent "cavity dimensions" of the required mode in the cavity and zero load quantity factor Q0. As for the resonantor loaded with medium, it uses test results by modes necessary for sublevel to compute frequencies of each interfered target mode finishing automatic search of resonate frequency of different modes after being interfered to test the resonate frequency of sample after loading and zero load quality factor Q0, finally, finishing test to multiple dielectric constants of different frequency according to the tested data.

An on-line quickly sampling and sample feeding device of multichannel gas consists of gas sampling unit formed by gas pipeline, multiple solenoid valves and a microdiaphragm vacuum pump; an fully-automatic six-way valve for feeding gas sample automatically; pipeline washing unit formed by a gas washing bottle and multiple solenoid valves; control unit formed by multiple switches being controlled manfully or being controlled automatically by computer .The property evaluating system of catalyst by utilizing said device is also disclosed .

The present invention relates to dynamometer testing of a vehicle comprising at least a first wheel shaft and a second wheel shaft and a first power source for providing power to said first wheel shaft. The method comprises, with only said first wheel shaft being connected to a dynamometer test unit,

• • applying a first power to said first wheel shaft,
  • determining a representation of said first power by means of said dynamometer test unit,
  • determining a second power, being different from said first power, to be applied to at least one of said first wheel shaft and said second wheel shaft, the said second power being a virtual power being represented by a virtual representation of said second power, and
  • by means of the representation of said first power determined by said dynamometer test unit and said virtual representation of said second power, determining a first speed being a representation of the speed of said vehicle when being driven on a road subjected to said first and second power.

The invention discloses a method for accurately measuring shale porosity by adopting the low-field nuclear magnetic resonance. The method comprises the following steps: as for a saturated water column-shaped shale sample, conducting nuclear magnetic porosity measurement in different echo time and waiting time; conducting helium porosity measurement; comprehensively comparing and analyzing the porosity results of the two methods; optimizing the optimal echo time and waiting time for testing to facilitate the accurate testing of follow-up samples. The method solves the problems of how to set reasonable parameters to measure the shale porosity by adopting the low-field nuclear magnetic resonance, and solves the problem that in the actual testing, the nuclear magnetic porosity obtained in different echo time and waiting time is in great disparity, and the comparability of the nuclear magnetic porosity and the helium porosity is relatively poor; compared with the prior art, by adopting the method, the shale porosity can be quickly and nondestructively measured, the accuracy and precision of the shale porosity measurement can be improved, and the operation is convenient.

The invention discloses a device for detecting a storage battery, comprising a CPU, an operational amplifier, a multi-way switch, a digital/analog (D/A) converter, a high-power MOS tube, a coupling capacitor, a programmable bandpass filter and an analog/digital (A/D) converter. The high-power MOS tube is connected on a storage battery discharge detection circuit in series. The CPU is used for controlling discharge of the storage battery so as to generate excitation current. The detected current signals and voltage signals are amplified by the operational amplifier after the coupling capacitorsubtracts the direct current component, and the signals are transmitted to the A/D converter to be changed into digital signals after the programmable bandpass filter gets rid of the interference signals, then the digital signals are transmitted to the CPU to be processed and complex impedance of the storage battery under the corresponding frequency can be obtained after arithmetical operation. The CPU can control the MOS tube via the D/A converter to change the waveform and frequency of the discharge current of the storage battery so as to realize measuring a plurality of frequencies of the storage battery. A detecting method using the device can be used for detecting the storage battery by an AC discharge method in multiple frequency points.

The invention relates to a load frequency response test system of a hydraulic cylinder and a test method thereof. The technical scheme of the system is as follows: the oil outlet of an oil pump (9) is communicated with the port P of an electro hydraulic servovalve (13), wherein, the opening A or the port B of the electro hydraulic servovalve (13) is communicated with the rodless chamber of a hydraulic cylinder (2) to be tested, and the rod chamber of the hydraulic cylinder (2) to be tested is communicated with an oil tank (11); the hydraulic cylinder (2) to be tested is installed in a closed stander (1); a displacement sensor (3) is installed on the hydraulic cylinder (2) to be tested and is electrically connected with the A/D port of a data collecting card (5) and a PID controller (6); and one end of a servoamplifier (7) is electrically connected with an electromagnet of the electro hydraulic servovalve (13), the other end of the servoamplifier (7) is electrically connected with one end of the PID controller (6), the other end of the PID controller (6) is electrically connected with the D/A port of the data collecting card (5), and the data collecting card (5) and computer-aided test software (4) are installed in a computer. The load frequency response test system has the advantages of simple systematic structure, accurate test and high degree of automation.