Auswahl der wissenschaftlichen Literatur zum Thema „VL53L1X“

One of the functionalities which are desired in Ambient and Assisted Living systems is accurate user localization at their living place. One of the best-suited solutions for this purpose from the cost and energy efficiency points of view are Bluetooth Low Energy (BLE)-based localization systems. Unfortunately, their localization accuracy is typically around several meters and might not be sufficient for detection of abnormal situations in elderly persons behavior. In this paper, a concept of a hybrid positioning system combining typical BLE-based infrastructure and proximity sensors is presented. The proximity sensors act a supporting role by additionally covering vital places, where higher localization accuracy is needed. The results from both parts are fused using two types of hybrid algorithms. The paper contains results of simulation and experimental studies. During the experiment, an exemplary proximity sensor VL53L1X has been tested and its basic properties modeled for use in the proposed algorithms. The results of the study have shown that employing proximity sensors can significantly improve localization accuracy in places of interest.

Suatu sistem peringatan dini tanah longsor berbasis SMS telah dirancang-bangun untuk mendeteksi dan menginformasikan kepada masyarakat lokasi tanah longsor. Metode yang digunakan adalah metode penginderaan berat dengan sistem sensor terdiri dari sensor jarak VL53L00X (objek pantul berupa cermin) dan pegas (dengan panjang 9 cm, diameter 2 cm dan konstanta pegas 62,39 N/m). Ketika terjadi pergeseran tanah dalam arah bidang gelinciran, ujung atas pegas akan tertekan oleh gaya berat bidang tanah yang bergeser sehingga jarak objek pantul dengan sensor semakin dekat. Akibatnya, jarak yang dideteksi sensor semakin besar. Hasil uji menunjukkan bahwa prototype mampu mendeteksi pergeseran tanah permukaan dalam rentang 1 hingga 7 cm. Selain itu, sistem ini juga mampu mengirim SMS untuk status siaga II (pergeseran tanah sebesar 2,39 cm), siaga III (3,17 cm), dan bahaya (4,11 cm; bunyi alarm).Kata kunci : sistem peringatan dini, tanah longsor, sensor jarak VL53L0X, pegas, SMS

Digital data recording of the geometry of 3-dimensional objects require a 3D scanner tool which are mostly using an imagery sensor. However there is hardly used information of scanned result, named color. Imagery sensor requires high spesification processing unit as capable as a personal computer for data acquisition processing. This research aims to build a 3D surface scanner using a time of flight laser ranging sensor and to develop its simple function to become more valuable device. Using point to point displacement method, the sensor measures the distance between the outermost point of the object and the sensor surface perpendicularly, once when one measurement is done then the object to be rotated along with the rotary table. The prototype was built using the VL53L0X sensor and ATMEGA8535 microcontroller as a motor controller for rotary table and vertical axis. Scanned data is sent from the microcontroller to the computer to be visualized in real time. The results show that the VL53L0X sensor is suitable for scanning convex objects but it is not capable to handle objects with multiple cavities.

Perkembangan zaman saat ini mempengaruhi berbagai aspek kehidupan masyarakat, yang mana gaya hidup di kalangan masyarakat saat ini yang lebih suka mengkonsumsi makanan siap saji. Terutama makanan siap saji dengan bahan dasar kentang yaitu stik kentang. Produk olahan stik kentang banyak dilakukan pada industri rumahan yang masih menggunakan alat produksi secara manual yang tidak dapat memproduksi dalam kapasitas banyak dan membutuhkan waktu yang lebih lama. Dari permasalahan tersebut penulis mencoba merancang sekaligus membuat alat pemotong kentang secara otomatis agar waktu yang dibutuhkan untuk memproduksi relatif lebih singkat dan kapasitas dari hasil yang didapatkan lebih maksimal. Alat ini dibuat dengan meneliti waktu yang dituhkan alat untuk memotong 0,25 Kg kentang. Dalam penelitian ini menggunakan sensor VL53L0X sebagai pendeteksi kentang, pneumatik untuk mendorong kentang ke arah mata pisau yang digerakkan oleh kompresor dengan mengatur tekanan udara menggunakan selenoid valve dan ATMega 328 sebagai pusat kontrol pada sistem kerja alat secara keseluruhan.

Technological capabilities of agricultural units cannot be optimally used without extensive automation of production processes and the use of advanced computer control systems. (Research purpose) To develop an algorithm for recognizing the coordinates of the location and ripeness of garden strawberries in different lighting conditions and describe the technological process of its harvesting in field conditions using a robotic actuator mounted on a self-propelled platform. (Materials and methods) The authors have developed a self-propelled platform with an automatic actuator for harvesting garden strawberry, which includes an actuator with six degrees of freedom, a co-axial gripper, mg966r servos, a PCA9685 controller, a Logitech HD C270 computer vision camera, a single-board Raspberry Pi 3 Model B+ computer, VL53L0X laser sensors, a SZBK07 300W voltage regulator, a Hubsan X4 Pro H109S Li-polymer battery. (Results and discussion) Using the Python programming language 3.7.2, the authors have developed a control algorithm for the automatic actuator, including operations to determine the X and Y coordinates of berries, their degree of maturity, as well as to calculate the distance to berries. It has been found that the effectiveness of detecting berries, their area and boundaries with a camera and the OpenCV library at the illumination of 300 Lux reaches 94.6 percent’s. With an increase in the robotic platform speed to 1.5 kilometre per hour and at the illumination of 300 Lux, the average area of the recognized berries decreased by 9 percent’s to 95.1 square centimeter, at the illumination of 200 Lux, the area of recognized berries decreased by 17.8 percent’s to 88 square centimeter, and at the illumination of 100 Lux, the area of recognized berries decreased by 36.4 percent’s to 76 square centimeter as compared to the real area of berries. (Conclusions) The authors have provided rationale for the technological process and developed an algorithm for harvesting garden strawberry using a robotic actuator mounted on a self-propelled platform. It has been proved that lighting conditions have a significant impact on the determination of the area, boundaries and ripeness of berries using a computer vision camera.

Federal Scientific Agroengineering Center VIM conducts research and development work on the determination of parameters, technical characteristics of machines and operating modes of magnetic pulse treatment (MPT) of plant material in field conditions. (Research purpose) To analyze systems of adaptation of the working elements of an automated unit in field conditions during the technological operation of magnetic pulse treatment of strawberry. (Materials and methods) To ensure the quality of the technological operation of irradiating plants with a low­frequency magnetic field, as well as to maintain the required value of magnetic induction in the working area, an automated system of adaptation of the working elements of the unit has been developed. The experiment has been carried out for three times on the plot of garden strawberry with a length of 140 m using an automatic system of adaptation of the working elements of the unit and without its use. To control the travel speed use has been made of an electronic GPS speedometer. Operating modes of pulse magnetic treatment (frequency, duty factor, exposure time) have been selected for the ВИМ­МИО device and the БСА­01 automated control unit. To control the distance between the object of magnetic pulse treatment and the working element, use has been made of a measuring tape, a laser rangefinder (Amtast AMF106) and a laser sensor (Laser sensor VL53L0X) mounted on the magnetic inductor of the automated unit. For monitoring and keeping the obtained experimental data, the authors have used the program Advanced Serial Port Monitor 4.4.9 (Results and discussion) As a result of the experiment, the authors have determined the dependence of the deviation of the working surface position of magnetic inductors from the required distance. The maximum and minimum values of distances between the plant and the working element of an automated mounted unit during the technological operation of magnetic pulse treatment have been found. (Conclusions) The analysis of the experimental data calculation results has shown that the variation scope of the data obtained by using an automated adaptation system of the working elements is 2.1 times less than in case with a disabled system. The coefficient of variation of the obtained values (a measure of deviation from the standard value) when using the adaptation system of the working elements is 2.35 times less than in case with a disabled system. The developed system of automated adaptation of the working elements provides a distance of 0.18­0.25 m between the working elements of the unit and plant objects, which allows to maintain the required value of magnetic induction of 5 MT in the treatment zone. The authors have established parameters of the working elements necessary for magnetic pulse treatment of garden strawberry in the field conditions: 48 turns of a cable of 1x2.5 mm with an outer diameter of 400 mm, an inner diameter of 30 mm, and an inductance of 373 µH.

The aim of the project is to help differently able person, especially blind or visually impaired people, who are unable to recognize the object which is coming towards them. When a visually impaired person navigates into the heavy traffic area, it is difficult for them to cross the street. The outcome of the project is to give a signal to the visually impaired person, so that he/she can be able to keep themselves in a safe/static zone and is easy to use for the visually impaired person. In this project we use glass sensors having an accurate and precise sensor (VL53L1X) which is based on the LIDAR which will calculate the distance between objects or hurdles in front of blind person and respond. For response we have use a vibrating mini motor which will alert the blind person by giving vibrating alert. A vibration will be produced in accordance with the distance. Nearer the object, faster will be the vibration and far the object, slower will be the vibration. We have tried to make a user friendly and handy equipment by using a power supply of 3.7V battery, which is rechargeable, compact in size and easy to use by the user. An Arduino Nano is being used to reduce complexity of circuit and to produce the required output.

The biggest household issue is the cleaning of house or surrounding are without wasting much time but the cleaning process is laborious and time taking process, but for maintaining hygiene in house, house must be cleaned regularly. So, for keeping in mind this issue in this paper an autonomous cleaning robot is discussed, this robot works on predefined algorithm for cleaning the floor and follow a particular path for cleaning the floor. The robot comprises a frame on which all the essential units of robot are mounted. The Bluetooth module for communicating with user, motors for providing movement, ultrasonic and VL53L0X for sensing surrounding environment, a water pump for providing vet cleaning with a cloth which is connected with a bar and rotated by a servo motor.

This thesis deals with the implementation of a system for measuring the amount of water in the tank using a 12V water pump. The whole system is controlled by the ESP32 microcontroller. The introduction deals with the theoretical analysis of various principles of measuring the level of liquids. The next part deals with the procedure of the construction of the measuring device and its theoretical analysis. The last part of the work deals with the control of the pump and the individual functions that provide this control. The ultrasonic distance sensor AJ-SR04M was chosen for the implementation of the device. The volume of water in the tank is calculated from its data. The ESP32 microcontroller provides system control via a web interface. The whole system was implemented and tested to measure the volume of water and its pumping in the IBC container.