Automotive electronic sensor signal automotive CAN bus simulation development tool

Automobile electronic sensor signal transmission - automobile bus simulation development tool) engine speed (R) signal, which is obtained by using the magnetoresistive effect of the sensor contacts. Its output is generally a sinusoidal signal, and the instantaneous frequency of this sinusoidal signal is R.
)Intake manifold pressure signal, the intake manifold pressure sensor produces a linear output of ~, and is proportional to the absolute pressure of the air entering the manifold.
3) Engine temperature signal, the temperature sensor is an electric thermistor.
) The air-fuel ratio signal of the mixture, the oxygen sensor produces a linear output of ~, which is proportional to the oxygen concentration in the mixture at the exhaust pipe. This is a measurement of the actual air-fuel ratio of the engine.
)Throttle position sensor signal.
) The fuel signal is obtained by measuring the pulse width induced by the controller's nozzle.
Among them, the first five signals are related to the operating conditions of the engine, so they play a very important role. Especially for systems where the controller calculates the pulse width based on these signals. The fuel signal is of great significance for the vehicle's stroke calculation.
The output of sensors on the engine system and chassis system are all analog signals, which need to be conditioned or buffered by analog circuits before being sent to the microcontroller/converter or timer channel for further processing. Discrete signals (such as the thermistor output) are sent directly to the / channel, and the time base signal is sent to the timer channel. Convert the incoming data into bit encoding (based on cyclic redundancy coding). In each cyclic redundancy cycle, each / of the analog-to-digital converter () channel will be initialized, and then the conversion result and the pulse width of the timer data will be stored, and the last stored data in the memory will be called to form a data frame. , and then transmitted to the wireless modem sequentially through R. It has a three-state bus on which all data channels and peripheral equipment units are connected. All peripherals are controlled by memory mapped control registers.
Signal conditioning is the conversion of analog signals from sensors into digital signals used for data acquisition, controlling processes, performing calculations, display readouts, and other purposes. Analog sensors can measure many physical quantities, such as temperature, pressure, force, flow, position, value, light intensity, etc. Typically, sensor signals cannot be converted directly to digital quantities because the sensor outputs are relatively small changes in voltage, current, or resistance and therefore must be conditioned before being converted to digital quantities. Conditioning is the process of amplifying, buffering, or calibrating an analog signal so that it is suitable for the input of an analog-to-digital converter (ADC). Then, the analog signal is digitized and sent to a microcontroller or other digital device for system data processing. Key to the operation of this link is the selection of operational amplifiers that correctly interface with the various types of sensors being tested. Then, the designer must choose. Should have the ability to process signals from the input circuit and produce a digital output that meets subsequent resolution, accuracy and sampling rate requirements.