Ten Daily Electronic Common Sense-Section 18

What constitutes an airbag protection system?

It is generally composed of a sensor, a controller (ECU), a gas generator, an air bag, and the like.

What are the distributions of car engine control?

1. Electronically controlled gasoline injection (EFI).
2. Electronically controlled ignition device.
3. Exhaust gas recirculation system (EGR).
4. Idle Speed Control (ISC).

Which registers are included in the I/0 register?

Mainly include: system configuration register, interrupt status and control register, port data register, port direction register, timer and other function module status and control registers.

Usually, which two parts does the positioning system consist of?

1. Reference point with known coordinates;
2. Relationship between sensor and reference point.

The design of the PROFIBUS protocol meets the two basic requirements of media control?

• Communication between complex automation systems (master stations) must ensure that any station has enough time to complete the communication task in a precisely defined time interval.
• The communication between PLC or PC and I/O peripheral equipment (slave) should complete the real-time transmission of data as simply and quickly as possible, and the data transmission time increased by the communication protocol should be minimized.

What are the main sources of the room system?

The source of the room system mainly includes four types: macro base station, micro base station, radio remote unit (RRU) and repeater. Of course, the source can be divided into GSM source, PHS source, and CDMA.Source, WCDMA source and TD-SCDMA source.

How to design a tag antenna?

1. Determine the application environment of the RFID tag. Once the application category is determined, the requirements for the RFID tag can be determined, and then the design data is prepared according to the requirements to prepare for the design.
2. Since the antenna is the core component of the tag, the design requirements for the tag can be further transformed into the design requirements for the tag antenna, and the design requirements for the tag antenna mainly include frequency band, size and shape, impedance bandwidth, radiation characteristics, recognition range, Mobility, cost and reliability when applied.
3. Determine the material of the antenna, that is, determine the construction material of the antenna according to the design requirements of the tag antenna. The material selection of the microstrip patch antenna mainly refers to the selection of the radiation conductor and the insulating base material.
4. Determine the load impedance of the tag antenna.
5. Determine the antenna type and its parameter index.
6. By modeling the tag antenna, the parameters of the tag antenna are simulated and optimized for many times until the design results meet the design requirements.
7. Modeling and simulation are important aspects of tag antenna design, while experimental analysis and measurement are the verification of the former results, and experiments can also help to analyze and optimize the antenna design.
8. The design evaluation can be obtained by comparing the results obtained from the simulation and experiments with the design requirements of the specific application.

What are the car parts?

The car part includes: a car body, a car door, a safety gear device, a guide shoe, a door opener (door opening motor, a door opening mechanism), and a car controller.

What is a linear output throttle position sensor?

The linear output throttle position sensor is a potentiometer type sensor consisting of a sliding contact:

1. A sliding contact

2. A Resistor, a throttle shaft, a wiring plug, and the like.

What is a photopotentiometer?

Photosensitive potentiometers, also known as photo potentiometers, are non-contact potentiometers. The characteristics of the non-contact potentiometer are that there is no active slippage of the ordinary potentiometer, that is, a brush (also called a moving contact). The disadvantage of the photoelectric potentiometer is that the resistance range is not large and the temperature coefficient is large (the temperature coefficient of the resistive photoelectric potentiometer is as high as 0 junction-type junction-type junction-type junction-type junction-type junction-type junction-type junction-type 0.001 to 0.01/°C in the range of 22 to 70 °C).There are two kinds of photoelectric potentiometers: one is a resistive photoelectric potentiometer, and the other is a junction type photoelectric potentiometer.