Abstract: With the development of the economy, the Android system is widely used in electronic information and communication systems, especially mobile devices. For example, most of the smartphones such as Motorola and Samsung use the Android system. The accelerometers and gyroscopes provided by the Android system are hardware-based sensors, and there are three sensors, even hardware-based, software-based sensors. The article is based on the application of the five sensor technologies of the Android system. I. Introduction With the development of mobile devices such as mobile phones, people's requirements for mobile devices are not limited to traditional mobile phone functions such as making calls and QQ, and require smart phones to have more sophisticated entertainment business functions. At present, the application functions of traditional computers are basically all intelligent. on the phone. As a popular system platform, Android has a lot of features to be talked about, the most dazzling of which is the various sensors of the Android platform. Second, based on Android mobile device sensor technology overview (1) Introduction to the Android platform Android's Chinese translation is Android, which originally means robots. It is Google's Linux-based free and open code-based operating system. This operating system integrates application software, user interface, operating system and middleware to create a mobile The terminal opened a complete mobile software and officially developed a successful interview on November 5, 2007. Android (Android) was originally an operating system developed by Andy Rubin. The main mobile device supported is a mobile phone. In August 2005, Google acquired Android and did not invest in Android. In 2007, under the leadership of Google, the A ndroid system was improved, making Android a Linux-based free and open code-based operating system. In addition to supporting smartphones, it also supports mobile phones such as tablets. equipment. Android is a completely open operating system. Its rapid development has made its development trend diversified. Google's powerful Internet functions and service advantages, the future of Android mobile technology applications is very good. (B) based on the Android platform sensor overview The sensor is the first pass of the measured signal input. It is a component of the sensor system. It consists of a carrier and a circuit-connected sensor and conversion component, but the sensor system is a sensor that combines some information processing capability component. The sensor is a detection device and is a premise device for realizing automatic control and automatic detection of mobile devices. The sensor technology of the Android platform application has many dazzling sensor technologies such as attitude sensor technology, photoelectric sensor technology, magnetic field sensor technology and acceleration sensor technology. The sensor system is very powerful and provides great convenience for users. Third, based on Android mobile device sensor technology application (1) Application of acceleration sensor technology based on Android mobile device The acceleration sensor of the A ndroid platform is an Android hardware-based sensor, which can effectively track the motion status of mobile devices such as mobile phones and computers, and is widely used in mobile devices. The mobile devices of the Android platform rarely have an acceleration sensor. Accelerometers have become an integral part of mobile applications, such as Samsung, Motorola, gaming platforms and many other devices that use this type of accelerometer. Although the use of acceleration sensor characteristics has become the mainstream trend of Android platform development mobile applications, there are many problems in the development and application process of the addition degree sensor. For example: large amount of repetitive labor, poor versatility of design schemes, and low code reuse rate. Aiming at these problems in accelerometers, combined with the working principle of accelerometers, a general design scheme for solving these problems is proposed. The purpose of this scheme is to enhance the reusability of software, shorten the development cycle of applications, and improve the development of accelerometers. effectiveness. 1.Android acceleration sensor works The motion acceleration of the object can be easily detected by detecting the change of the motion acceleration of the object. The Android acceleration sensor has the function of detecting the acceleration of the mobile device in three-dimensional space, and can acquire the parameters of the acceleration sensor of the mobile device by knowing the motion state of the mobile device, thereby controlling the three-dimensional space. The way mobile devices move. 2. Android platform acceleration sensor universal There are two factors influencing the acceleration of the design scheme. One is the magnitude of the acceleration and the other is the direction of the acceleration. These two factors are determined by the motion state of the mobile device. When designing a universal design scheme for the acceleration sensor of the Android platform, it is only necessary to consider the magnitude of the acceleration and the direction of movement of the mobile device. The difference between the 3D space coordinate system of the Android platform acceleration sensor and the plane drawing coordinate system of the mobile device is that when the screen direction of the mobile device such as a mobile phone is switched between the horizontal and vertical screens, the direction of the drawing coordinate system rotates with the screen direction of the mobile device, but the acceleration The coordinate axis direction of the sensor coordinate system remains unchanged. In the actual application of the acceleration sensor, in order to reflect the acceleration change received by the acceleration sensor on the motion state of the mobile device, the coordinate system direction of the acceleration sensor must be switched to be consistent with the direction of the drawing coordinate system, so that two screens of the mobile device appear. The display of the state, the coordinate system processing method is different, resulting in the design scheme can not be universal. When designing the coordinate system of the acceleration sensor, the screen orientation of the mobile device can be fixed horizontally or vertically, and the processing logic in the direction conversion process of the two coordinate systems can be simplified by avoiding the switching of the screen orientation of the mobile device during the running of the application. This simplification only needs to consider a coordinate system transformation processing method, solves the problem of large duplication of labor quantification, and improves development efficiency, but it should be noted that the screen orientation of the mobile device is different, and the coordinate transformation processing method is also different. (2) Application of photoelectric sensor technology based on Android mobile device 1. The working principle of photoelectric sensor The basis of the working principle of the photoelectric sensor based on Android mobile device is the photoelectric effect, which is a change of the measured mobile device into a change of the optical signal, and the converted photoelectric signal is converted into an electrical signal by the photoelectric conversion element of the photoelectric sensor. 2. Application of photoelectric sensor Photoelectric sensor is a sensor that uses photoelectric elements as a component to detect moving devices. It includes three parts: light source, photoelectric element and optical path. It has fast detection response, many measurable parameters, simple structure, flexible form, non-contact and high precision. Many advantages. It is often used in mobile equipment inspection, smoke turbidity detection, strip material processing, deviation from correct position size and direction detection, and packaging filling height detection. Fourth, the conclusion The article first introduces the introduction of Android platform based on the introduction of Android mobile device sensor technology, introduces various powerful sensors based on Android mobile devices, and then discusses the acceleration sensor and photoelectric sensor based on Android mobile device in detail. This Automation curtain is specially designed for automation industry. SDKELI LSC2 light curtain is designed for automation field, with small size, compact structure and strong anti-interference ability, and the product meets IEC 61496-2 standards. The Automatic Light Curtain is with reliable quality and very competitive price. It has been used in many factories and has replaced curtains from Sick, Omron, Banner, Keyence, etc. Automatic Light Curtain,Laser Light Curtain,Automation Light Beam Sensor,Automatic Infrared Beam Sensor,Infrared Beam Curttain Sensor,Infrared Beam Sensor Jining KeLi Photoelectronic Industrial Co.,Ltd , https://www.sdkelien.com