45results about How to "Reduce production test costs" patented technology

The invention relates to a method for measuring a indicating diagram of an oil filed oil extractor without a load sensor, which comprises the following steps: the indicating diagram of an oil filed oil extractor is used for measuring and calculating a self machine of an oil extractor, a CPU controls the operating state of a transducer through a control unit, the transducer controls a main motor of the oil extractor according to signals transmitted by the CPU, one side of a balancing weight block of a crank device of the oil extractor is provided with a displacement sensor which can transmit adisplacement signal to the CPU through a signal collecting unit, the operating data of the collection transducer are transmitted to the CPU, the CPU carries out coordinate treatment for the displacement signal and the operating data of the collection transducer to obtain a main motor indicating diagram, the CPU carries out vectorial resultant treatment for the main motor indicating diagram and the oil extractor indicating diagram to obtain a feed rod indicating diagram of an oil extractor feed rod, and the feed rod indicating diagram comprises displacement data and load data. In the invention, load sensors, pressure sensors, and the like do not need to be arranged on the oil extractor feed rod or a walking beam, and the like, and the invention can accurately and reliably measure the indicating diagram of the oil extractor without stopping unloading, and the like.

A parallel multiplex test system is disclosed. The parallel multiplex test system is used for testing N devices under test (DUTs) in the N isolation boxes via N test signals through N test channels. The parallel multiplex test system comprises a central processing unit and N function-test modules, wherein N is a positive integer greater than one. The parallel multiplex test system requests the function-test modules to take the function-tests for N DUTs according to the test items which have not been tested, so that different function-tests are taken for all of the DUTs simultaneously through different channels.

A semi-anechoic box for broadband measurement, comprising a cylindrical box body; a measuring microphone is arranged in the center of the box body, and sound-absorbing materials or sound-absorbing structures are arranged on the inner walls of the box body except for the surface where the object to be measured is installed, so that The space distance between the microphone and the surface of the sound-absorbing material or sound-absorbing structure is more than 20cm. The space separation distance is related to the lowest measurement frequency of the measurement. The lower the minimum measurement frequency, the greater the space separation distance. The internal cross-section of the cylindrical box of the present invention is polygonal; the cross-section of the outer box is rectangular. The box body includes sound insulation and sound absorption materials, which occupies a small space and does not require a large special test room. It is easy to use, convenient for large-scale product quality testing, and reduces production and testing costs; Easy to operate; due to the good sound insulation performance, the measuring device is less affected by external interference, so the test accuracy is high, the test data repeatability is good, and it can be used in many different environments.

The invention relates to the technical field of optical communication, in particular to an optical module capable of adopting liquid immersion refrigeration and a manufacturing method thereof, wherein the optical module includes a PCB board, an optoelectronic device, an optical lens and an optical connector; the optoelectronic device is installed on the PCB board , the optical lens is fixed above the optoelectronic device; one end of the optical connector is connected to the optical lens, and the other end is extended by an optical cable with a pigtail; the outside of the optical module is encapsulated by low-pressure injection molding materials, and the low-pressure injection molding materials meet: injection pressure 1.5 ~40bar, injection molding temperature lower than 110℃, adhesion with PCB board greater than 3000mpa.s, impedance performance matching with high-speed signal line of optical module. The optical module of the present invention is fully plastic-sealed with low-pressure injection molding materials, has low cost, high integration, and simple assembly, and can be used for a long time in a liquid immersion environment, effectively preventing the cooling liquid from polluting the optical path and interfering with the optical path.

The present invention provides a DEVM test platform for a Wi-Fi6 chip, wherein the function signal generator provides a trigger signal for a vector signal generator, a spectrum analyzer and a power meter respectively, and also provides an enabling signal for the chip to be tested; the vector signal generator The device is used to provide pulse modulation signals for the chip under test; the power supply is used to supply power to the chip under test; the input end of the directional coupler is used to connect the chip under test, the coupling end is connected to the power meter, and the through end is connected to the input end of the spectrum analyzer; The computer separately controls the function signal generator, vector signal generator, spectrum analyzer, power meter and power supply to realize the DEVM performance test of the chip to be tested. The present invention also provides a DEVM testing method of the Wi-Fi6 chip. Compared with related technologies, the test platform and test method of the present invention have high efficiency and precision and low cost.