On the expressway, the car is dense, the speed is very high, and a vicious accident occurs. The anti-collision radar using DSP for real-time processing can make judgments and start the control system in a very short time to prevent accidents. When a collision occurs, the airbag controlled by the DSP can protect the driver and the occupant in time.
Reducing vibration is another important technical indicator of the car. In the past, the mechanical spring damping system was not very effective, especially when the road conditions were not good. In the new shock absorption system, the information such as the speed, acceleration, and position of the car is picked up by the sensor and sent to the DSP. After real-time judgment, the hydraulic system of the wheel is dynamically adjusted to ensure that the passenger always feels like a flat ride. The road is as comfortable as it is.
The new car noise suppression system sends the noise information inside the car to the DSP. After real-time processing, it produces sounds of the same amplitude but opposite phase to offset the original noise, thus creating a comfortable environment for noise-free cars.
Coupled with the use of DSP's fuel-saving system and exhaust gas monitoring system, a new type of car has used dozens of DSPs, making the automotive industry a major user of DSP.
Other industrial fields are similar. The application of DSP in industry focuses on servo control and plays an increasingly important role in applications such as automatic assembly, automatic machining, and industrial robots.
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High-speed data processing of DSP in oil exploration and aircraft wind tunnel testing Seismic exploration is one of the important methods of oil exploration. It uses artificial explosion to generate seismic waves. When it encounters two different rock formation interfaces, it will be reflected up and received by multiple sensors. Through signal processing, the depth and shape of the interface will be obtained.
Wind tunnel testing is an indispensable experimental part of the design and development of aircraft and its components. A large number of sensors are placed on the aircraft model, placed in the wind tunnel to simulate the actual flight conditions, and the signals acquired by the sensors are processed to verify the performance of the aircraft and to obtain data for modifying the design.
The common feature of petroleum exploration and wind tunnel testing is that there are many sensors (up to several hundred), the amount of signal data is large, and the mathematical model of signal processing is complex.
The traditional analog test system records the signal sent from the sensor on the tape. After the test is finished, the tape is played back and the recorded data is processed. Due to the large amount of data, it usually takes a long time to process (some months). This is obviously unfavorable for the timeliness of the project. The accuracy of processing results such as nonlinear distortion and noise inherent in analog signal recording and processing systems such as tape drives adversely affects.
The DSP-based real-time processing system fully reflects the superiority of the digital system. It can process the acquired data in real time according to the established mathematical model. When the test is over, all the test results can be obtained, and the timeliness is fundamentally improved. Changing the signal processing model is achieved through software, and its flexibility is unmatched by analog systems. The digital system has high precision and good anti-interference, which is beyond the reach of the analog system.
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