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356 results about "Test card" patented technology

A test card, also known as a test pattern or start-up/closedown test, is a television test signal, typically broadcast at times when the transmitter is active but no program is being broadcast (often at sign-on and sign-off). Used since the earliest TV broadcasts, test cards were originally physical cards at which a television camera was pointed, and such cards are still often used for calibration, alignment, and matching of cameras and camcorders. Test patterns used for calibrating or troubleshooting the downstream signal path are these days generated by test signal generators, which do not depend on the correct configuration (and presence) of a camera. Digitally generated cards allow vendors, viewers and television stations to adjust their equipment for optimal functionality. The audio broadcast while test cards are shown is typically a sine wave tone, radio (if associated or affiliated with the television channel) or music (usually instrumental, though some also broadcast with jazz or popular music).

Test paper reading method and test paper reading device

The invention provides a test paper reading method and a test paper reading device, which can read dry chemical test paper strips, colloidal gold immunochromatograohic assay test paper strips/cards and rapid pesticide residue test cards, are easy to operate, need no extra detection instrument and equipment, can automatically judge and read the detection result by only acquiring corresponding developing pictures through electronic equipment such as computers or mobile phones, have reliable testing accuracy and are particularly suitable for personal and household wide application. The method comprises the following steps: A. acquiring images; B. processing the acquired images; C. performing negative and positive discrimination; and D. performing concentration conversion on a sample which is discriminated to be positive in the step C through a concentration-gray scale relation to obtain a concentration value of the to-be-tested paper card/strip. The device comprises a shell and a built-in standard gray scale strip, wherein the shell is provided with a standard gray scale strip display window and is also provided with a first card slot, a second card slot and a third card slot for arranging the colloidal gold card, the rapid pesticide residue test card and the dry chemical test paper respectively.
Owner:BEIJING ZHIYUNDA TECH CO LTD

Automatic detection system and detection method for mobile phone camera

InactiveCN104104761AMeet the requirements of different locationsBest shot imageSubstation equipmentTest cardControl line
Disclosed is an automatic detection system for a mobile phone camera. The system comprises a test clamp module for placing a mobile phone; a signal feedback device for leading out a test result; a control unit which is electrically connected with the test clamp module through a test control line so as to control a test to start or end and output whether the test result is qualified and is eclectically connected with the mobile phone through a shooting control line so as to send a shooting instruction and feed a shot test image; and a test cart card module which is opposite to the test clamp module for shooting and comparison of the camera. The mobile phone is placed on the test clamp module, a control interface module sends a signal to be detected to the control unit, the control unit sends a test starting instruction to the mobile phone through the shooting control line so as to drive the mobile phone to start a test, after the test card chart module is shot, the mobile phone transmits a detected image to the control unit through the shooting control line for comparison calibration, and the control unit, according to a comparison analysis result, gives a feedback to a signal feedback device so as to output and display whether the test result is qualified.
Owner:赛龙通信技术(深圳)有限公司

System for automatically testing parameters of quartz crystal oscillator

The invention discloses a system for automatically testing the parameters of a quartz crystal oscillator, which comprises a master computer and a parameter test card connected with the main board of the master computer, wherein the parameter test card comprises a singlechip and a test circuit and a reference circuit which are connected with the singlechip respectively. The singlechip has a D/A module, an A/D module, a first counter, a second counter and a timer. The test circuit comprises a current amplification circuit, a voltage sampling resistor, a frequency dividing circuit, a first measurement gate control circuit and the crystal oscillator to be measured. The reference circuit comprises a reference frequency source, a frequency multiplication circuit, a second measurement gate control circuit and a frequency dividing and high-frequency signal latch circuit. In the invention, the test card integrates the functions of all apparatuses such as a frequency counter, a digital voltmeter and a digital oscillometer and can be directly inserted in the main board of the computer, and the fully automatic test of various parameters, such as working frequency, working current and start up time, of the quartz crystal oscillator can be realized by a control program.
Owner:天津必利优科技发展有限公司

Digital and analog mixed signal chip test card

The invention discloses a digital and analog mixed signal chip test card. A chip test circuit on the test card comprises an interface module, a configuration chip, an FPGA processing module and an analog-to-digital conversion module, the interface module is connected with the FPGA processing module through a bus, the FPGA processing module connected with the configuration chip is connected with the analog-to-digital conversion module and a tested chip carrier through a control end respectively, and is connected with the tested chip carrier through a digital signal output end, an analog signal output end of the tested chip carrier is connected with an input end of the analog-to-digital conversion module, a data clock signal and a state signal of the tested chip carrier are connected with the FPGA processing module respectively, a control end of the analog-to-digital conversion module is connected with the tested chip carrier, and an output end of the analog-to-digital conversion module is connected with a digital signal input end of the FPGA processing module. The test card has reasonable design, has the characteristics of steady performance, quick test speed, high efficiency, flexible and convenient use and the like, and realizes the test function for digital and analog mixed signal chips.
Owner:天津津能易安泰科技有限公司
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