Hyundai cars are getting closer to the 'auto', 'smart car', automotive sensors will inevitably become the advanced system of 'nerve endings' for the central processor to provide the necessary information
Electronic information technology has become a leading factor in the direction of the development of new generation of cars, automotive power performance, handling performance, safety performance and comfort performance and other aspects of improvement and improvement, will depend on the mechanical system and structure and electronic products, information technology The perfect combination of electronic technology has made the development of the concept of automotive products has undergone profound changes. In addition to some car audio, video equipment, automotive communications, navigation systems Sensor and automotive office systems, network systems and other electronic devices in the nature of the change is less, the modern automotive electronics from the application of electronic components to the car electronic system Architecture has entered a new stage of essential improvement, one of the most representative of the core device is the smart sensor.
Automotive applications related to the sensor in addition to light intensity, image sensors and active detection of ultrasonic, microwave, millimeter-wave radar, but also includes pressure, level, flow, location, height, distance, speed, speed, torque, acceleration, temperature, humidity , Gas concentration and other sensors, as well as for the bus bus CAN bus intelligent sensor. The industry is using non-contact position Suction Control Valve measurement, magnetoresistance, magnetic change, Hall effect, microprocessing silicon chip, thermal coating, Piezo ceramics and other technical methods, the use of generalized, standardized design concepts to provide market demand Automotive Sensors.
A wide range of products have been deeply integrated into the various functional systems of the vehicle, including engine management systems, chassis and drive systems, safety systems, body electronic systems, air conditioning systems and so on. From the development trend of automotive sensors, it will not only be limited to the engine management system, but more and more with environmental protection, security and intelligence together. The next few years, the use of automotive engines and drives is still the largest application of smart sensors, although its growth trend will be no other applications so obvious; exhaust emissions control sensor demand growth prospects are still optimistic about the world's automobile exhaust emissions Restrictive regulations are becoming more stringent, which will vigorously drive the growth of the emissions control sensor market.
In addition, with the focus of automotive safety technology from passive safety to active safety, security applications will be a huge growth potential of the market. For car consumers, safety first, its importance lies in performance, entertainment and fuel efficiency. The direct push and influence of the government is a major reason for the rapid development of car safety applications. For tire pressure monitoring, for example, under the Federal Automotive Safety Standard 138 (FMVSS138), the United States Fuel Rail Pressure Sensor is in the process of imposing a requirement that cars manufactured for the US market must install a direct tire pressure monitoring solution by 100% by 2007.
The Chinese government is also considering forced heavy vehicles equipped with ABS systems to improve road safety conditions. Although China does not require the use of tire pressure monitoring system (TPMS) of the relevant provisions, but this application also appeared in the growth trend. Tire pressure sensor is just one example. Will see the safety and security areas will have more and more applications, can make the car itself becomes more secure, more comfortable and more efficient. Hyundai Motor must use more sensors to improve the degree of intelligence. He also believes that security applications will be one of the key growth areas.
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In the industry to build the highest level of safe driving environment for the ultimate goal of the technical competition, a variety of emerging security system solutions contests, endless, can be said, 'can not do, can not think of.' It is foreseeable that the future of the most advanced intelligent sensor system will make the car has a human 'sixth sense' the same high degree Temperature Sensor of wisdom and magic, so that the safety of the car to an unprecedented height. From the current point of view, is gradually beginning to be imported high-end cars intelligent sensor systems are:
Alcohol Testing MEMS Systems: A new type of signal processing circuit, such as STMicroelectronics, integrates an alcohol sensor that utilizes a tin dioxide MEMS element to adsorb oxygen based on the oxygen concentration in the environment and make the resistance value change. Under normal circumstances, the components in the adsorption of oxygen in the air will maintain a resistance value does not change, and once the air contains alcohol, the element surface of the oxygen element will react with alcohol, the resistance value decreased. By measuring the resistance value, the concentration of alcohol contained in the exhalation can be detected. Alcohol detection MEMS sensors can be implanted in a sealed housing with a diameter of 8mm, embedded in the steering wheel together with a signal processing circuit, etc., and a safety alarm is issued once the driver's exhaled gas is detected.
Automatic wiper system: light-emitting diodes to the front windshield light beam, when the raindrops hit the glass in the sensor area, the light reflected by the light intensity, due to the amount of moisture or moisture on the glass and change, change the wiper Of the brush frequency; or through the infrared electronic rainfall sensor sensor the amount of rainfall, and with the speed Pressure Sensor changes automatically adjust the wiper speed, enhance the driver's driving convenience, so that driving more secure.
Electronic automatic lighting system: electronic sensor headlight through the car outside the light and dark sensor automatically monitor the outside world, in the sky changes or into the cave, the electronic sensor will automatically open the headlights to reduce the driver Operation time, increase traffic safety.
Tire pressure monitoring system: the installation of high sensitivity sensors on each tire, in the state of the vehicle at any time to monitor the tire condition, and through the sensor to the wireless transmission to the receiver, so that drivers can keep abreast of the leak and temperature rise tires Condition to ensure the safety of the car, and to extend the life of the tire and reduce fuel consumption. The most advanced direct tire pressure monitoring solutions include advanced warning systems and pressure, temperature, voltage and motion detection.
Airbag trigger system: such as Freescale launched satellite acceleration sensor, can be extended to the entire car around to detect the collision. Integrated with SmartMOS technology via acceleration sensors, designed to detect collisions and trigger airbags on the front and side of the car. An integrated device provides acceleration detection, voltage regulation, MCU function and wired communication protocol. Freescale offers a wide range of acceleration sensors, ranging from 1.5g to 250g, covering the X, XY, XYZ and Z-axis directions.
A trend is still emerging and is expected to spread over the next few years, and the agency will require the use of automotive dynamic control (VDC) systems, also known as 'electronic stability control (ESC) systems.' He said that the current system is a standard configuration of high-end cars, but will continue to spread to more cars. 'The stability control system is particularly beneficial for SUV recreational vehicles because the car has a high center of gravity and is prone to rollover.' In addition, with the development of image sensing and processing technology, there are more for road separation alarms And guidance, driver sleep detection, road barrier sensing, smart airbag deployment, blind spot detection and other sensor-based intelligent systems will gradually enter a new generation of automotive applications.
Automotive applications are often regarded as one of the most difficult areas because of its extreme operating temperature range and strong mechanical vibration. The action of the electronic control system of the vehicle must be fast, correct and reliable. The traditional circuit monitoring and control system built by discrete electronic components can not meet the requirements of Hyundai. It needs to integrate through hardware, directly exchange data and simplify the circuit, and improve the degree of intelligence To ensure the correctness, reliability and timeliness of the control unit action. And now almost all of the mechanical parts of the car have been controlled by electronic devices, but the car body space is limited, the component system space is extremely limited. Ideally, the electronic sensor, the control unit should be tightly integrated Throttle Position Sensor with the controlled components to form a whole, which requires a new generation of sensor and control circuit as much as possible miniaturization, integration.
The various functional parts of the car have their own movement, handling characteristics, the car sensor, most of the very harsh operating environment, and different. Such as high temperature during working conditions, low temperature at rest, high concentrations of oil vapor and active (toxic) gases, as well as high-speed and high-intensity shock and vibration. Therefore, the sensors and circuits must have a high stability, anti-environmental interference and adaptive, self-compensation adjustment ability. According to Honeywell's Chen Yang, automotive sensors in the factory before going through high and low temperature storage, constant hot and humid, thermal shock, mud splash, salt water splash, vibration and electromagnetic interference and other rigorous testing to ensure that product performance from the surrounding environment Impact.
One of the most important and even critical requirements for the above is that electronic components for automotive electronics, modules must be capable of large-scale industrial production and can reduce costs to acceptable levels. A new generation of smart sensors is a model for this. Such as intelligent acceleration sensors, it can not only meet the needs of modern cars, but also because the IC can be integrated in the standard production line, the production cost is low, so in the automotive industry to find their own largest application market , In turn, also contributed to the intelligentization of automotive products.