2results about How to "Same sensitivity" patented technology

The application discloses a microphone calibration method and device, and relates to the field of electronic products. A first smart device and a second smart device with a voice interaction function are in the same local area network. The first smart device sends a second trigger instruction for indicating the second smart device to enter a microphone calibration mode to the second smart device in a microphone calibration mode. Calibration audio played by a target device at a preset distance is collected to obtain first audio data, and the first audio data is sent to the second smart device, so that the second smart device obtains calibration parameters of a microphone of the second smart device according to the first audio data and second audio data. The second audio data is obtained by the second smart device based on the calibration audio played by the target device at the preset distance. The application guarantees the consistency of the sensitivity of the microphones of different smart devices.

The application provides a pipeline detection system, belonging to the pipeline detection field, and the system comprises a sensor construction device, a signal generator and a data acquisition instrument, the sensor construction device is used for importing pipeline basic parameters and a plurality of sensor parameters, and an electromagnetic simulation model is constructed; the pipeline basic parameters, the electromagnetic simulation model and the plurality of sensor parameters are used to select a sensor meeting the requirements; the sensor is arranged in a pipeline to be detected, and is electrically connected with the signal generator and the data acquisition instrument respectively; and the signal generator is used for generating an alternating excitation signal. The application can improve the accuracy of a detection result, does not need to be in direct contact with a pipeline wall, has relatively strong lift-off capability, does not have a component such as a steel brush affecting passability in structure, has relatively strong equipment deformation capability, has consistent sensitivity to defects of an inner wall and an outer wall of the pipeline, and can be suitable for pipelines on which a conventional inner detector cannot operate.