508 results about "Test channel" patented technology

A handheld diagnostic device having a test head and a handle is equipped with an open test channel having sensors and liquid reagent dispensing opening for the diagnostic testing of body fluids. The test channel can draw in fluid sample by capillary force and be closed by a channel cover for mixing the fluid sample with liquid reagent for electrochemical reactions for providing measurement signals for diagnostic analysis by a microprocessor included in the handle. A vibration means is added for stimulating the production of the body fluid sample and for assisting mixing of the sample solution. A renewable biosensor having a reusable electrode system and a dispensing means for providing a new dose of liquid reagent is included in the test head for repeated uses of the test channel and the biosensor. A dual-dispensers system having two reagent cartridges and two dispensing lines is included for simultaneous or selective dispensing of reagents for multiple diagnostic testing. The handheld device can be used for the self-diagnostic testing of saliva, body fluid, blood and vagina fluid for home healthcare and for monitoring predetermined components in a pourable fluid. For vagina fluid applications, a handheld diagnostic device may include cream or foam dispenser for dispensing vagina medication material, lubricant, or spermicide.

The present disclosure relates to microfluidic devices adapted for facilitating cytometry analysis of particles flowing therethrough. In certain embodiments, the microfluidic devices have onboard data storage capabilities. In certain other embodiments, the microfluidic devices have onboard anticoagulants. In certain other embodiments, the microfluidic devices have onboard test and control channels. In certain other embodiments, the microfluidic devices have integrated collection media. In certain other embodiments, the microfluidic devices have multiple onboard test channels. In certain other embodiments, the microfluidic devices have localized temperature control. In certain other embodiments, the microfluidic devices have anatomy simulating regions. In certain other embodiments, the microfluidic devices have complete assay capabilities. In certain other embodiments, the microfluidic devices have dissociable sections. In certain other embodiments, the microfluidic devices have means for performing functional assays.

A disk drive includes a disk drive housing having a breather hole and a separate leak testing hole, both the breather hole and the leak testing hole being formed through the disk drive housing, and a drive sub-component attached to a surface of the disk drive housing so as to form an interface between the sub-component and the surface of the housing. The interface defines an interface outer perimeter and a sealed airflow testing channel in fluid communication only with the leak testing hole to enable a non-destructive detection of leaks at the interface. The airflow testing channel may be disposed within the interface outer perimeter.

An image processing system for predicting ovulation using a test channel for collecting saliva sample and a miniature camera for capturing the image of the saliva at dried state for analyzing the crystalline patterns for ovulation prediction. A rotary bristle element is attached to the drive head and a notch-like test channel traverses the width of the drive head. A conductivity sensor is mounted on a wall of the test channel for detecting filling and drying of the saliva sample. An algorithm in the microprocessor analyzes the image of the dried saliva and calculates the characteristic line length of line segments of connected saliva dots. A ferning index is also defined and calculated based on the percentage of area coverage of line segments which are exceeding the threshold line length. Trend curves are established based on the daily saliva analysis in a woman's menstrual cycle for predicting days from the ovulation.

The invention is directed to an oxygen sensor arrangement 8 for sensing the oxygen in a breathing loop 29 of a breathing apparatus 100. The sensor arrangement 8 comprises at least one primary oxygen sensor 30 arranged to operatively measure the oxygen in the breathing loop 29, and a control arrangement 40 for obtaining measures from said oxygen sensor. A test channel arrangement 15, 362 is adapted to operatively provide a first gas having a first fraction of oxygen from a first supply 20 to said primary oxygen sensor 30 at a position 267 adjacent to or directly adjacent to said primary oxygen sensor. A first test valve arrangement 41 is arranged to operatively open and close the flow of said first gas through said test channel arrangement 15, 362. Said a control arrangement 40 is arranged to operatively actuate said first test valve arrangement 41 so as to provide an amount of said first gas to said primary oxygen sensor 30 via said test channel arrangement 15, 362.

Apparatus enabling modular implementation of active optical cable (AOC) with multiple integrated functions including: integration of different types of data on the AOC via media conversion; distribution of electrical power over the AOC; electrical multiplexing data channels for optical fibers; integration of voltage regulators enabling AOC operation at different supply voltages; integration of voltage regulators to provide stable, low noise power source; ruggedized, blind-mateable electrical connectors; integration of electronics and optoelectronics inside a connector backshell; implementation of health monitoring and test channel enabling monitoring, test, and control of both ends of the AOC and monitoring and control of upstream systems and components; and enabling a form, fit, function replacement of existing electrical cables to improve SWaP, electromagnetic interference resiliency, length-bandwidth product, electromagnetic pulse resistance, signal integrity, system reliability, testability and maintenance. AOCs are customized for different connectors, pin-outs, electrical data combinations, power distribution and power supplies with minimal redesign / requalification.

In a multi-channel electrical communication system 1, a method of estimating the interference level in a test channel due to the intermodulation of two or more other channels, where each channel is centred upon a carrier frequency. The method comprises, for a given m-th order mode, an initial step of identifying the set(s) of carrier frequencies, the m-th order linear combination of which gives rise substantially to the carrier frequency of said test channel. This process is carried out by a computer 2. For the or each of the identified set of carrier frequencies, signal generators 3 are tuned to respective ones of the carrier frequencies. The generated signals are applied to an input of the communication system 1, and the intermodulation interference at the carrier frequency of the test channel is measured at an output of the system 1.

The available modulation schemes of a network are analyzed to determine which ones contain excessive phase noise or narrowband interference. A network element is selected and assigned to a test channel at a first modulation scheme at a predetermined power level to achieve a predetermined PER. The network element transmits a test signal and the network controller measures the signal to noise ratio (SNR) in the received test signal. If the SNR is not within a predetermined tolerance range of an estimated SNR for the modulation scheme at the predetermined PER, the modulation scheme is determined to have excessive phase noise or narrowband interference. Each available modulation scheme is tested by instructing the network element to transmit the test signal using each modulation scheme and assigning the power level of each modulation scheme. The suitable modulation schemes may be determined.

Any number of transceiver channels is tested for jitter generation / tolerance simultaneously. Tested channels use a serial loopback path to connect a transceiver transmit channel to a transceiver receiver channel. Both the transmitter and receiver PLLs are connected to a common reference clock. The reference clock is modulated with jitter at a frequency below the bandwidth of the transmitter PLL but above the bandwidth of the receiver PLL. The magnitude of eye closure (in an eye diagram), which is equivalent to the amplitude of the jitter, is used to filter out bad transceiver units.

The invention discloses a radio frequency test system and a radio frequency test method. While the first equipment to be tested is tested by a testing instrument, the wiring and starting operation of the second equipment to be tested is performed; and after the test of the first equipment to be tested is finished, a test channel of the testing instrument is switched to the second equipment to be tested to test the second equipment to be tested. Zero wait of the testing instrument is realized by combining a radio frequency switching device with a parallel test program, so that the utilization ratio of the testing instrument reaches 100 percent, and the production testing capacity is improved under the condition that the resources of the testing instrument are limited. Meanwhile, an indicator lamp is arranged on the radio frequency switching device and is used for indicating current test conditions. Therefore, on the premise of unnecessarily opening a computer monitor, the test progressand test result can be clearly known through the luminous state of the indicator lamp, and the test operation of the technician is convenient.

The invention discloses a protocol automatic testing method and a system thereof. The method comprises the following steps: a server end stores test cases and configures testing parameters; the server end and a user end are configured with the same channel parameters which include parameters for a control channel between the server end and the user end and parameter for a test data channel between the server end and the user end; the server end sends a start command to the user end on the control channel; after receiving the start command, the user end feeds an acknowledgement signal back to the server end on the control channel; and after receiving the acknowledgement signal, the server end sequentially invokes the test cases according to the testing parameters, and carries out the test cases together with the user end on the data test channel. The method and the system overcomes the shortcoming that automatic testing can not be carried out in the prior art, and needs not to install any additional equipment for testing.

The invention discloses a method, device and system for testing a service, wherein the method for testing the service comprises the steps of establishing a test task source and at least one application path test channel of a test task target route according to a test task, and performing end-to-end service quality test by simulating a test channel accessed to a customer network environment. By simulating the customer network environment to access to a conventional network data device, the method, device and system for testing the service, disclosed by the invention, have the advantages of realizing customer perception oriented end-to-end service test, satisfying end-to-end Internet service quality required by a test customer and solving end-to-end automatic test tasks of the Internet, which cannot be realized in the prior art at a relatively low cost.

The invention discloses a system and a method of testing a micromotion contact resistance. The system comprises a microchecker unit, a micromotion contact resistance test unit, a data acquisition unit and a computer unit. The method has the following steps that a test micromotion contact resistance system is started for initialization, and the micromotion and control command parameter information is set in the computer unit and sent to the microchecker unit; the microchecker unit carries out micromotion according to the received micromotion and control command parameter information and adjusts the micromotion amplitude according to the self-formed micromotion feedback information; the micromotion contact resistance test unit carries out contact resistance test for a connector contact pair in micromotion, and the data acquisition unit samples the contact voltage signal and outputs the sampled signal to the computer unit for data storage, processing and graphic display. The system and the method of measuring a micromotion contact resistance are capable of regulating and controlling test parameters according to requirements, widening the test channel of the micromotion contact resistance and improving the accuracy of micromotion contact resistance test.

The invention discloses a system and a method for automatically testing an analog module with a settable input / output (I / O) channel in a programmable logic controller (PLC). The system comprises an upper control computer, a programmable direct current signal source, a digital multimeter, a channel and voltage / current mode switching control plate and a communication interface, wherein the upper control computer sets a testing parameter, issues an instruction to realize output or measurement, receives a test result and makes judgment according to the result; the programmable direct current signal source receives the instruction and the parameter to set the output as a voltage or current mode, sets and outputs a voltage / current signal to an input channel; the digital multimeter receives the instruction to set the measurement as the voltage or current mode, measures the voltage or current signal output by an output channel and returns a measured value to a computer; the channel and voltage / current mode switching control plate switches a test channel and a voltage / current connection mode according to the instruction; and the communication interface transmits the parameter, the instruction and the test result between each device and a tested model. A computer reads the conversion value of the voltage or current measured value of the input channel through the communication interface or transmits a set numerical value to the output channel to convert the set numerical value into a voltage or a current.

The invention discloses a chip burning checking method, which comprises the following steps that S1, users set required burning checking parameters on burning checking equipment; S2, the burning checking equipment carries out detection; S3, the chip sequence number ID (identity) is sequentially subjected to reading, calculation, burning and checking; S4, chips subjected to the sequence number ID checking are sequentially subjected to file byte data reading, calculation, burning and checking; S5, the chips subjected to the file byte data checking are subjected to burning state protection bit calculation and checking. The chip burning checking method has the advantages that the communication mode is converted into a parallel mode from a serial mode, the burning-while-checking-verifying multi-channel single comparison mode is adopted, abnormal burning links are discovered in time, abnormal test channels are judged in time, the integral testing efficiency of the burning checking is improved, the channel contact electrification condition is effectively distinguished, the reverse insertion and mistake insertion of the channels can be prevented, and the occurrence of quality accidents caused by plate taking error can be effectively avoided.

Each base station in a network has an antenna which is connected in the conventional way to a transceiver for handling normal call traffic on one or more radio channels. In addition there is another transmitter which transmits a test signal on each of several test channels, one for each radio channel available for use by the main transceiver. The transceiver also has a receiver for detecting the test channels. The system is controlled by a timer which ensures that the transmitter and receiver do not operate at the same time. The receive times may be random, or may be co-ordinated between individual base stations. When the receiver is in operation, it will detect transmissions of the test signals from other base stations. The signal strength is measured and the result is used by a control system to determine a preference value for each channel; the stronger the signal detected, the lower the preference value. The preference value is used to control an amplifier system which controls the signal strength of each channel transmitted by the transmitter. It is also used to control the traffic transceiver by selecting which traffic channels are to be used in accordance with the preference values.

The invention relates to a downhole instrument high-speed single-core cable transmission device used for well logging of a flowing well and a water injection well, wherein, a high-speed cable telemetry pipe nipple is connected with a releaser through a single-core plug on the upper end and connected with various parameter measurement pipe nipples through a slip ring four-core plug on the lower end; a telemetry pipe nipple circuit and a parameter pipe nipple circuit comprise singlechips which are connected with industrial buses; a telemetry pipe nipple industrial bus and a parameter measurement pipe nipple industrial bus are communicated with each other through a signal core 2 and a signal core 3 of the slip ring four-core plug; each singlechip comprises 8 address bits, 16 data bits and 255 test channels, controls a data output port to transmit serial data and a data input port to receive the serial data, and controls transmission and receipt of industrial bus data; after address comparison and coding of the received data and controlled transmission and receipt of the industrial bus data, the data is transmitted to the ground through a single-core cable; transmission rate of the cable reaches 20 K, and transmission rate of a downhole instrument reaches 40K, thereby well-logging aging is greatly improved.

A testing method transponder channel frequency response based on a vector network comprises the steps of (1), selecting a PNA-X-series vector network analyzer and a switching matrix with a vector network analyzer testing channel as testing equipment; (2), performing frequency scanning self-calibration on the vector network analyzer; (3), respectively calibrating an uplink testing channel and a downlink testing channel of the system by means of the vector network analyzer; (4), connecting the vector network analyzer with the switching matrix and a to-be-tested transponder, and constructing a testing channel; (5), setting related parameters in the vector network analyzer, finishing amplitude frequency characteristic measurement, outband inhibition measurement and group delay measurement through automatic controlling of the vector network analyzer, and simultaneously drawing a corresponding signal trace line; and (7), extracting testing result data of three testing items, and respectively deducing insertion loss and time delay of the testing channel, thereby obtaining a final channel frequency response testing result of the tested transponder.

The invention belongs to the technical field of aviation electronics and specifically provides an online automatic testing circuit and method of a multichannel collection interface applied to a flight data collection system. According to the invention, a testing circuit is added to a differential output terminal of a multichannel analog switch of a multichannel analog signal collection circuit. The method sets different states of the single-pole triple-throw analog switch of the testing circuit by means of a collection control module, calculates signal voltage values of tested channels collected in different states, compares calculation results and theoretical values and check the deviation therebetween, and then determines whether an interface circuit fails. The method can detect such failure modes of the interface circuit as open circuit, short circuit and parameter drift of resistors. The testing circuit and the method can improve the self-testing capability of an interface resistor network. Especially for multichannel signal collection systems using multipath switches, the method can achieve interface testing while reducing testing hardware substantially.

Selectable attenuators are used in the reference and test paths of a VNA, with attenuation automatically inserted or deleted when the Device Under Test (DUT) attenuation reaches predetermined thresholds. Attenuation in the reference channel is removed when the signal in the test channel is sufficient to overcome the leakage of the reference channel. Additionally, attenuation is removed from the test channel when the reference channel has a high attenuation inserted to further increase the difference between the leakage reference signal and the reduced test channel signal thus allowing lower isolation requirements on the two (or more) receiving channels.

A system is provided to enable leakage current measurement or parametric tests to be performed with an isolation buffer provided in a channel line. Multiple such isolation buffers are used to connect a single signal channel to multiple lines. Leakage current measurement is provided by providing a buffer bypass element, such as a resistor or transmission gate, between the input and output of each buffer. The buffer bypass element can be used to calibrate buffer delay out of the test system by using TDR measurements to determine the buffer delay based on reflected pulses through the buffer bypass element. Buffer delay can likewise be calibrated out by comparing measurements of a buffered and non-buffered channel line, or by measuring a device having a known delay.

The invention discloses an antenna testing system which comprises a signal transmission simulator, a channel simulator and a wave absorbing chamber, wherein at least two antennas are arranged in the wave absorbing chamber, the antennas are connected with the signal transmission simulator through the channel simulator and used for providing at least two paths of transmitting signals to equipment to be tested; the two antennas are positioned on a spherical surface taking the position of the equipment to be tested as the centre of sphere. Simultaneously, the invention also discloses an antenna testing method on the basis of the testing system. More than one testing channel model are arranged in the signal transmission simulator. A channel model is selected from the channel models, a wireless signal is transmitted according to the selected channel model and simulated by the channel simulator, and then the simulated wireless signal is transmitted through the antennas in the wave absorbing chamber; and the equipment to be tested which is arranged in the wave absorbing chamber receives the transmission signals of all the antennas, processes the signals and outputs the processing result. The antenna testing system and the testing method are easy to realize and have lower cost.

In one embodiment, the invention is spectrophotometer with a light emitting diode illuminator. In one embodiment, a spectrophotometer for characterizing a reflectance spectrum of a specimen includes an optical assembly for illuminating the specimen, where the optical assembly includes at least one light emitting diode. A measurement head is coupled to the optical assembly for collecting light reflected by the specimen, and a spectrum analyzer is coupled to the measurement head for performing spectral analysis of the collected light into a plurality of spectral bands. A reference channel provides illumination from the optical assembly to the spectrum analyzer, while a test channel provides the collected light from the measurement head to the spectrum analyzer.

The invention discloses an oil liquid elastic modulus tester based on bulk modulus definition. The cylinder rod of the loading cylinder inserts into the test channel to do axial displacement; the oil inlet port of the single direction value is connected with the rod channel of the loading cylinder and the oil outlet port is connected with the test channel; the pressure sensor is connected with the test channel; the built-in type displacement sensor is positioned in the punch and the cylinder rod; the non-rod channel and the rod channel of the loading cylinder and the test channel are separately connected with the liquid pressure system. It uses the loading cylinder to press the oil liquid of the test channel and changes the pressure to obtain the corresponding changing value of the oil liquid volume.

An automatic test equipment (ATE) unit, which incorporates a mass interconnect system. The mass interconnect system is provided with a universal mounting table for use with receiver and test interface modules for electronically mounting and testing a variety of different types of electronic components or unit under test thereon. The mounting table test interface module incorporates MEMS based spring contacts to provide high-speed micro test-channels in order to establish signal connectivity between the components or unit under test and the tester, and which maintain the signal integrity up to 50 GHz without significant signal loss distortion.

The invention relates to a method for distributing ascending resource, used in communication system with multi-user complex. Wherein, it comprises that: using time division multiplex method to divide one ascending transmission time slit into one or several data signal transmission time sections and reference signal transmission time sections; said data signal transmission time section carriers the user data to the receiver; the reference signal transmission time section transmits the reference signal known by receiver for evaluating and testing channel to the receiver; the data signal occupies the time-domain resource not layered; the reference signal occupies available frequency resource via CDMA.

This invention discloses a test device and a method for stray of CDMA mobile terminal radiation, in which, the device includes: a broadband horizontal electromagnetic wave chamber connected with a communication channel and a test channel, and the method includes: 1, measuring energy loss of the communication channel and the test channel, 2, setting up connection of the CDMA mobile terminal to be tested with the measured communication channel and the test channel to set up a test environment, 3, testing the CDMA mobile terminal.

A method for introducing errors into a digital fiber optic communication link so that small analog changes in optical transmission efficiency can be determined by changes in the audible error rate. The method comprises providing a transmitter with a test channel that provides a pseudorandom encoded optical transmission through coupled fiber optic cables. The signal is sent through the cables and received by a receiver which introduces and measures errors. The received signal is split and processed by a clock recovery circuit and a lowpass filter. The clock recovery circuit obtains the optimal sampling point. The lowpass filter filters the data and provides a timing adjustment relative to the recovered clock signal. The clock retimes the filtered data with a sampling comparator. The variable timing introduces errors allowing optical transmission efficiency measurements. A bit error rate tester produces audible sounds whose frequency content is related to the bit error rate. Optimal transmission efficiency is determined by manipulating the cables and their associated ferrules until the audible sounds have the lowest frequencies.

The invention discloses a rotary sample addition type fully-automatic blood coagulation tester. The tester which comprises a test system, a rotary sample addition system, an inclined reagent refrigeration system, a cleaning system and a cabinet is characterized in that the test system assembles four test channels which can simultaneously work; the rotary sample addition system comprises a rotary sample addition arm module, a sample addition probe module with constant temperature heating and liquid level probing functions, and a lead screw linear guide rail sample introduction control system; the inclined reagent refrigeration system which adopts an inclined mode to install a reagent bottle saves the reagent and avoids waste; and the cleaning system comprises an overflow type cleaning module and a double-channel peristaltic liquid charging and discharging system. The tester has the advantages of accurate test, accurate sample addition, reagent saving, long reagent preservation time, constant heating of the test system, high detection efficiency, simple operation, good cleaning effect, safe and efficient liquid discharge, and small noise.