ADAS is the abbreviation of AdvancedDrivingAssistantSystem, which refers to the advanced assisted driving system of automobiles. A specific function that can be realized is to activate the automatic brake to stop the vehicle, keep a certain distance to follow the preceding vehicle, and control the steering wheel to prevent the vehicle from deviating from the lane before the other vehicles are rear-end.
Whether driving normally or driving in a hazardous environment, most driver assistance systems on the market today provide additional information to help drivers, as shown in the following figure. In both cases, the system can help reduce the occurrence of collisions. There are two trends in the future of advanced driver assistance systems:
Active and passive safety: future trends
Trend 1: There have been some changes from the early warning system to the intervention system. ADAS's current main responsibility is to alert drivers in critical situations, such as blind spot detection systems. In the future, the system will evolve to an intervention system that controls the car under limited conditions. For example, the camera system will evolve from the lane departure warning system to the lane control system.
Trend 2: Combine active and passive safety systems. Currently, passive safety systems in collisions are independent of active safety ADAS, such as airbags and pre-shrinkable seat belts. There is no interconnection between them, such as preparing airbags when airborne lidars, radar or video sensors detect inevitable collisions. The current airborne lidar sensor is used in an active cruise control system to provide support for drivers under normal driving conditions. In the future, these sensors will be combined with short-range radar (24 GHz) and cameras to provide appropriate information for airbags and pre-shrinkable seat belts.
Complete collision prevention system
These trends will make the collision prevention system more complete. The system can detect the inevitable collision accidents by monitoring the environment around the vehicle by using various sensor technologies. In the event of a collision, the system intervenes in the dynamic performance of the vehicle (eg braking) and pre-triggers the passive safety system. This development trend means the integration of brakes, controllers and sensors in the vehicle. The development and implementation of such an ADAS system also requires consideration of the following factors: synergy, convergence, structure, and system.
If a sensor can only implement one function, it is difficult to obtain a more cost-optimized solution. For example, cameras can provide data on composite functions, such as monitoring road signs, traffic signals, and other road users. Collaborative features allow the system to easily add functionality by adding some software. If composite sensors are applied to a car, the data provided by these sensors can be fused together. This will enrich the information for the target and make the results of the detection more credible. In collision prevention systems, this increase in detection reliability makes system intervention and early warning easier and more effective. The use of composite sensors in vehicles has a major impact on the structure of the vehicle, such as the addition of electronic control unit ECU performance. Therefore, the vehicle should be treated as a complete system that is a collection of various components that interact with each other.
In order to achieve these development trends, Siemens VDO Automotive has participated in many international and domestic cooperation projects. The goal is to ensure traffic safety by combining a complete system approach. The safety system will support drivers in a variety of traffic situations, from normal driving to potentially inevitable collisions. Safety systems include traffic classification, risk assessment and action concepts.
In the past few years, the market for advanced driver assistance systems has begun to flourish. Currently, comfort-oriented systems (such as ACC) are mainly used in mid-level or luxury cars. In the future, these systems will be covered in safety systems and used in economy cars.
However, the development of advanced driver assistance systems should not be seen merely as a technical issue, including many of the effects with drivers and the impact relationship with vehicle structures. This makes the approach to system requirements very complex and important.
Domestic communication, 4 g module in addition to support two kinds of LTE FDD LTE/TD - LTE standard, also compatible with 2 g / 3 g down, support td-scdma/WCDMA/EDGE/GP/GSM/CDMA1X/EVDO mode. The data service downstream rate can reach up to 100Mbps, the uplink rate can reach up to 50Mbps, providing customers with high-speed Internet access and wireless data connection and other functions. In addition to providing high-speed data access, it also provides voice, SMS, communication book and other functions, which can be widely used in notebook, tablet, touch screen communication devices, smart phones, video surveillance, multimedia mobile phones and vehicle equipment and other terminal products and vertical applications. Today, I will introduce you to what is 4G module and how to use 4G module.
What is 4G module
4G module said TD-LTE and FDD-LTE and other LTE network standards are collectively referred to. It has the characteristics of fast communication speed, wide network spectrum and flexible communication. 4G module refers to a product whose hardware is loaded to the specified frequency band, software supports the standard LTE protocol, and software and hardware are highly integrated and modular. The hardware integrates radio frequency and baseband on a small PCB board to complete wireless receiving, transmitting and baseband signal processing functions. The software supports voice dialing, SMS sending and receiving, dial-up networking and other functions.
Second, how to use 4G module
The 4G module is usually inserted into the circuit board or the patch module is welded to the circuit board, and the corresponding SIM card is inserted, and the network is connected through the 4G cellular network. In the common transparent transmission mode, data can be directly sent to the target server through the 4G module, and the 4G module can receive data from the server at the same time, and send the data to the serial port, which is received by the serial port device connected to the 4G module. Users do not need to pay special attention to the data conversion process between serial port data and network data packets, only need to insert the module to the target position, simple connection and parameter setting, you can achieve transparent transmission between the serial port and the network end.
What is the 4G module How does the 4G module work
4G module, also known as 4G transmission module, 4G communication module, 4G LTE module. It is a kind of hardware loaded to the specified frequency band, the software supports the standard LTE protocol, and the software and hardware are highly integrated modular products, with good compatibility, fast communication speed, large amount of communication data, wide network spectrum, communication flexibility and other characteristics, widely used in electric power, environmental protection, finance, industrial automation and other fields.
The working principle of 4G module
It has the characteristics of fast communication speed, wide network spectrum and flexible communication. The hardware integrates radio frequency and baseband on a small PCB board to complete wireless receiving, transmitting and baseband signal processing functions. The software supports voice dialing, SMS sending and receiving, dial-up networking and other functions.
Through high-speed networking, the 4G module transmits all terminal business data and equipment operating status to the business center in real time. Through the management monitoring platform, the terminal equipment operating status can be monitored in real time and equipment faults can be timely checked. The efficiency has been greatly improved in many aspects such as operating cost, operation scale and service timeliness. Suitable for shared massage chair, public charging pile, vending machine, vehicle system, environmental monitoring, power remote monitoring and other industries.
4G module refers to a product whose hardware is loaded to the specified frequency band, software supports the standard LTE protocol, and software and hardware are highly integrated and modular. It has the characteristics of fast communication speed, wide network spectrum and flexible communication. The hardware integrates radio frequency and baseband on a small PCB board to complete wireless receiving, transmitting and baseband signal processing functions. The software supports voice dialing, SMS sending and receiving, dial-up networking and other functions. Through high-speed networking, the 4G module transmits all terminal business data and equipment operating status to the business center in real time. Through the management monitoring platform, the terminal equipment operating status can be monitored in real time and equipment faults can be timely checked. The efficiency has been greatly improved in many aspects such as operating cost, operation scale and service timeliness.
Good compatibility
4G module supports FDD LTE/TD-LTE two LTE standards, can also be backward compatible with 2G/3G, support LTE-FDD, LET-TDD, WCDMA, TD-SCDMA, CDMA, GSM and other bands.
Large amount of communication data
4G module downstream rate can reach up to 150Mbps, uplink rate can reach up to 50Mbps, to provide customers with high-speed Internet access and wireless data connection and other functions, suitable for large data transmission applications, such as: remote video surveillance.
High communication speed
The 4G module has a lower ping value than the 2G/3G module, and it takes less time for the module to send data packets to receive the response from the server, which is suitable for applications requiring high response speed, such as remote alarm.
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Shenzhen MovingComm Technology Co., Ltd. , https://www.mcrouters.com