【Automobile Engine Real-time Vibration Tracker】#1 Project Software Development Environment and Hardware Analysis

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【Automobile Engine Real-time Vibration Tracker】#1 Project Software Development Environment and Hardware Analysis [Copy link]

 

Project software development environment and hardware analysis

1. We would like to thank ON Semiconductor and Avnet IoT Innovation Design Competition for providing the opportunity to learn about the latest Bluetooth technology and application potential through project development.

2. Software development tools.

According to the quick start guide, you can use any development tool, Keil or IAR, and the differences in usage are not big. But obviously, it is most convenient to use the official version of GCC.

Select the project directory after startup

directly enter the main interface

Open Package Manager, select chip OnSemi -> RS10, select the required example code, and click the copy button

to import it directly into the project.

In fact, the quickest way is to rename the project directly, use Rename as your own project template, and then you can start developing. After carefully analyzing the framework, the entire tool code is divided into two types, using the OnSemi framework and the FreeRTOS framework. Obviously, OnSemi uses its own interrupt-based RTOS framework, which is simple and suitable for Bluetooth connection, and is obviously much more efficient than the general FreeRTOS. This is also an important reason for its extreme low power consumption.

3. Hardware and Tools

3.1 This development provides a variety of excellent development boards. This project chooses the RS10 002EVK evaluation board with an Arduino interface. This is a development tool with the best openness. Although it does not have a variety of built-in sensors, it is more flexible.

First, you need to jumper correctly and select the power supply. USB power supply is used here. This development board has excellent low power consumption and signal sensitivity. See the parameters below.

Ultra-Low-Power: - Industry's lowest power consumption in Deep Sleep Mode (62.5 nW) and Rx in Receive Mode (7 mW) - Industry's best EEMBC ULPMark scores (1090 ULPMark CP @ 3 V; 1260 @ 2.1 V)

Advanced Multi-Protocol Wireless Functionality: - Rx Sensitivity: - 94 dBM - Transmitting Power: -17 to +6 dBm - Supports Bluetooth Low Energy and 2.4 GHz proprietary/custom protocols - Supports Firmware Over The Air (FOTA)

It uses the ARM-M3 core, but does not have a DSP module, but rather ON Semiconductor's LPDSP32, as shown below:

The pin numbers used in this interface are as follows.

3.2 Sensors

This time we used KEMET's Tokin sensor.

The sensor cable is long enough to connect to any part of the car.

The parameters are as follows

It is converted into a voltage signal through the signal line, and has a high sampling frequency dynamic range. It is a high-performance vibration sensor.

w494143467

This design is quite special. In the case of a certain Tesla incident, it might be better to make a brake detection device!

lightxixi

The host shared very detailed

se7ens

How to distinguish positive and negative acceleration at one output port

justd0

se7ens posted on 2021-6-24 09:58 How to distinguish positive and negative acceleration at an output port

Similar to a 0v-5v signal, 2.5v is 0, and positive and negative vibrations are around 2.5v

通途科技

This design is very good, I collected it for study. It is illustrated with pictures and texts, very good! ! ! !