6 results about "Oscilloscope" patented technology

The invention provides an automatic calibration device for a multi-parameter physiological signal simulator. The automatic calibration device is designed in order to solve the technical problems that when measurement calibration is performed on an electrocardiosignal simulator or a multi-parameter physiological signal simulator at present, as a makeshift way is adopted, the signal is not stabilized, amplification factors cannot be adjusted, efficiency and precision are low, performance is unstable, and tracing is not available. According to the automatic calibration device, a signal input interface is directly connected with the calibrated simulator, and measurement calibration is performed on the calibrated simulator through a calibration output interface; tracing can be performed on time and voltage reference, multiple parameters such as the frequency and voltage of the calibrated simulator are traced to national measurement standards, and a communication interface is connected with an upper computer so that calibration data can be directly converted into a calibration record and saved. The automatic calibration device has the advantages that the structure of the device is compact, the calibration process is simple, and various auxiliary devices such as an oscilloscope and a counter do not need to be used; the device is of a high integration degree, high accuracy, high measurement precision, full-automatic operation and the like; in this way, the overall measurement calibration and tracing on the multi-parameter physiological signal simulator are completely achieved.

The invention discloses a device and method for detecting the optical detector working point of a particle detector. The device comprises a laser, an external modulation device, a cylindrical lens group, a sample cell, a focusing lens and an optical detector which are distributed according to preset positions, wherein the external modulation device is used to generate a detection signal and load the detection signal on the laser beam sent by the laser; and the device also comprises an oscilloscope and a processing circuit, wherein the optical detector is connected with the oscilloscope and the processing circuit through signal wires respectively to display the detection signal from the external modulation device on the oscilloscope and process the detection signal in the processing circuit. By using the device and method of the invention, the optical detector can work in a linear work area and the particle detection can be performed more accurately.

The invention provides a rock anisotropy detection system which comprises a reaction kettle, a laser, an interferometer, an oscilloscope and a control unit, wherein the reaction kettle is used for simulating the rock stratum environment; the laser is arranged outside the reaction kettle and is used for emitting laser to to-be-detected rock and exciting the to-be-detected rock to generate ultrasonic wave; the interferometer is arranged outside the reaction kettle and is used for detecting the ultrasonic wave; the oscilloscope is connected with the interferometer; the control unit is connected with the reaction kettle and is used for controlling the internal environment of the reaction kettle. The rock anisotropy detection system can be used for simulating the high temperature environment in which the rock is positioned during the drilling process, is easy to operate and is capable of lowering the detection cost.

The invention discloses an automatic recognition method for the Baud rate of a CAN bus of a digital oscilloscope, and the method comprises the following steps: 1, judging whether there is a signal inputted into an oscilloscope channel or not; 2, setting a Baud rate variable, and assigning a common minimum Baud rate to the Baud rate variable; 3, locating a second data frame or a remote control frame of a CAN bus signal; 4, decoding CRC segments of the data frame or the remote control frame; 5, comparing a CRC sequence of the CRC segments obtained through decoding with a CRC value calculated through a CRC algorithm of a CAN bus protocol: determining that the recognition of the Baud rate is successful and switching to step 7 if the decoded CRC sequence is equal to the calculated CRC value, orelse assigning a next common Baud rate value to the Baud rate variable from the small to the big; 6, repeatedly carrying out the steps 3-5, traversing all common Baud rates, and switching to step 8 if the recognition of the Baud rate fails; 7, displaying the recognized Baud rate value after the successful recognition; 8, finishing the operation. The method can achieve the automatic recognition and analysis of the CAN bus signal and obtains a correct Baud rate.

The invention provides a testing device capable of rapidly measuring laser receiving sensitivity and a preparation method thereof. The testing device comprises a transmitting module, a transmitting antenna, an attenuation sheet support and a shell; the transmitting module, the transmitting antenna and the attenuation sheet support are all arranged in the shell; the attenuation sheet support is installed at a butt joint port; one end, away from the butt joint port, of the attenuation sheet support is connected with the transmitting module through the transmitting antenna; and a to-be-tested product is placed at the outer side of the butt joint port and is electrically connected with an oscilloscope. According to the invention, sensitivity of the to-be-tested product can be visually analyzed, the performance of the to-be-tested product can be budgeted only through the device without the need of outfield distance measurement and outsourcing test of a distance measuring machine, and specific professional knowledge does not need to be mastered, so that a large amount of manpower and material resources are saved. Meanwhile, test results are visually displayed by means of the oscilloscope, so that scientific researchers can conveniently test and analyze various functions provided by the oscilloscope.