Communication Device with All Inevitable Features

Communication equipment, ICD, full name Industrial Communication Device. Wired communication equipment and wireless communication equipment for industrial control environments.

Wireline communication equipment mainly introduces serial communication, industrial bus communication, industrial Ethernet communication, and various communication protocol conversion devices. Wireless communication equipment is mainly wireless AP, wireless bridge, wireless network card, wireless lightning arrester, antenna and other equipment.

Basic Introduction

Wireless Fidelity, Wireless Fidelity: Short-range wireless technology used in offices and homes. The technology uses a frequency band around 2.4 GHz, which is currently a wireless band that is not licensed. There are two standards that can be used at present, namely IEEE802.11a and IEEE802.11b. The so-called WiFi communication device should refer to a communication device that supports this technology. The theory of electromagnetic waves was founded by Maxwell. According to electromagnetic waves, the telegraph communication equipment was Italian Marconi, and Bell was the person who invented the telephone. Wireless communication uses radio waves instead of cables to realize communication between devices. This communication method has the advantages of quick and easy installation and maintenance, is free from the influence of on-site terrain environment, and has low cost. The abundant products can meet users' communication distance and communication. Different requirements on speed.

Wireline communication

Overview

Wired communication means that the transmission of communication equipment needs to be connected through cables, that is, the information is transmitted using transmission cables such as overhead cables, coaxial cables, optical fibers, and audio cables.

Advantages and disadvantages

The greatest advantage of wired communication equipment is strong anti-interference, high stability, certain confidentiality, fast transmission speed, and unlimited bandwidth; however, wired communication is greatly influenced by the environment, and has weak scalability, attenuation, and construction difficulty. , Poor mobility, high cost.

Wireline communications equipment

Currently used wired communication devices include computers, televisions, telephones, PCMs, and optical transceivers.

 

Wireless Communication

Overview

The biggest advantage of wireless communication devices is the environment, does not need to be limited by the line, has certain mobility, can communicate through the wireless connection in the moving state, the construction is difficult and the cost is low; but the wireless communication equipment is weak in anti-interference, transmission rate Slower, limited bandwidth, limited transmission distance, and low cost. However, wireless communication is changing the corresponding technology to make the transmission rate higher (802,11n rate can reach 100Mbps no less than wired communication), more stable and convenient, so wireless communication equipment will be the development trend.

Wireless communication equipment

Satellites, radio stations, wireless TVs (on buses or subways), wireless LANs, mobile phones (mobile phones), mobile GPRS Internet access, etc.

Vehicle Communication

The vehicle terminal is an on-vehicle device for vehicle positioning service. It can provide vehicle users with a vehicle-mounted device such as positioning, navigation, anti-theft, anti-robbery, information release, Internet access, games and multimedia services.

Widely used in: public security, medical (120 ambulance), car rental, taxi scheduling, long-distance passenger and freight transport, and private need for vehicle safety monitoring.

Component

It consists of GPS module, GSM module, control module and peripheral equipment.

The GPS module receives communication and navigation satellite positioning information, and after calculation and analysis by the control module, it is sent to the GSM module. The GPRS function of the GSM module will calculate the post-analysis data. After the GPS service platform further calculates and parses, it becomes that people can read the information. Information, scheduling, management and control of vehicles. All data communications links are bidirectional.

WiFi

Wi-Fi (Wireless Fidelity), meaning wireless fidelity, is a short-range wireless technology used in offices and homes. The technology uses a frequency band around 2.4 GHz, which is currently a wireless band that is not licensed. WiFi communication devices comply with the IEEE 802.11 protocol, and currently widely used standards are: 802.11a, 802.11b, 802.11g, and 802.11n.

3G communication

3G communications equipment refers to the third generation of digital communications equipment. The first-generation communications equipment that came out in 1993 can only perform voice calls; the second-generation communications devices that appeared from 1996 to 1997 were able to receive data, such as e-mails and web pages; the main difference between the 3G communications equipment and the previous two generations was In the speed of transmission of sound and data, it can handle images, music, video streaming and other media forms, providing a variety of information services including web browsing, teleconferencing, e-commerce, and so on. Such derived products include: intelligent controllers, communication headsets, communication transmitters, communication helmets, communication instruments and some communication software.

Main function

1. Positioning function: After GPS realizes satellite positioning, the terminal LCD displays latitude, longitude, speed, azimuth and altitude, and sends the data above the monitoring target to the monitoring center by GPRS or GSM;

2. Self-navigation function: Bring the display to show the target longitude, latitude, altitude, speed, and receive center navigation information;

3, robbed alarm function: When the vehicle chasing road tyrants, start the concealed installation of the cab alarm button, the vehicle system will automatically send an alarm signal to the monitoring center, until receiving the monitoring center response;

4. Tracking function: After the vehicle is stolen and robbed, the monitoring center can automatically track the alarm vehicle;

5. Send status function: Press the number key, you can send pre-written status to the monitoring center (road resistance, fault, accident help, call, etc.);

6. Text-to-speech function: The monitoring center sends dispatching instructions and text messages, and the terminal will automatically read out with female voice; (optional)

7. Remote flameout function: In the rescue process of hijacked vehicles, the center can rescue the need for remote control vehicles to forcibly turn off the system, the system has double insurance, equipment failure will not cause accidental flameout;

8. Cross-border alarm function: The system can pre-set the vehicle's driving range. If the system exceeds this range, the system will automatically alarm to the center, and the vehicle's automatic voice prompts and icons will display an out of bounds.

9, speed alarm function: the system can set the vehicle speed in advance, beyond the speed range system will automatically alarm to the center, the system automatically generates statistical reports;

10, track recording function: automatic recording of vehicle travel data, the data recording terminal inside the FLASH memory inside, accidental power loss when the data is not lost.