Journal of Sensor Technology and Application
ISSN / EISSN : 2331-0235 / 2331-0243
Published by: Hans Publishers (10.12677)
Total articles ≅ 120
Latest articles in this journal
Journal of Sensor Technology and Application, Volume 10, pp 7-15; https://doi.org/10.12677/jsta.2022.101002
# 为了对煤矿、油田、大坝、桥梁等领域进行安全压力监测，设计了一种单线圈振弦传感器信号分析仪。该系统包括激振电路、拾振电路以及等精度测频部分，激振电路由单片机产生扫频脉冲信号，通过由HCPL3120芯片构成的驱动隔离电路对振弦传感器进行激振。拾振电路将传感器输出的微弱正弦信号放大、整形成方波信号，并由单片机读入进行等精度频率测量。最终，本设计实现了对单线圈型振弦传感器的激振，验证了各级电路的输出波形，完成了传感器输出频率的测量，能够更为准确的对煤矿、油田、大坝、桥梁等领域进行安全压力监测，具有很好的工程推广价值。 A single coil vibrating string sensor signal analyzer system is designed in order to monitor safety pressure of coal mine, oil mines, dams, bridges and other fields in this paper. The system includes excitation circuit, pick-up circuit and frequency measurement part with equal precision. The excitation circuit generates sweep pulse signal by single chip microcomputer. Vibration string sensor is excited by driving isolation circuit composed of HCPL3120 chip. The pick-up circuit enlarges the weak sinusoidal signal output by the sensor to form a square wave signal, then reads it into the single chip microcomputer for equal precision frequency measurement. Finally, this system realizes the excitation of the single-coil vibrating wire sensor, verifies the output waveform of the circuits at all levels and completed the measurement of sensor output frequency which have great project promotion value monitoring the safety pressure of coal mines, oil fields, dams, bridges and other fields more accurately.
Journal of Sensor Technology and Application, Volume 10, pp 37-44; https://doi.org/10.12677/jsta.2022.101006
# 车轮作为轨道式集装箱门式起重机(简称：轨道吊)的小车机构走行部的基础部件，其常见的病害形式为踏面剥离，因此准确分析轨道吊小车机构车轮的踏面情况对保障轨道吊的安全运行至关重要。以广州港某轨道吊为研究对象，运用刚柔耦合多体动力学方法和加速度周期对比算法，分别对正常、踏面剥离两种车轮类型进行数值模拟，获得相应条件下车轮的应力和振动加速度；在车轮轴承座处布置加速度传感器，获取车轮的振动加速度以判断是否存在踏面剥离。最后，将车轮的振动加速度仿真结果与实测结果进行比较，验证了数值仿真模型的可靠性。 The wheel, as the basic component of the running gear of the trolley mechanism of the rail container gantry crane (referred to as rail crane), whose common defect is tread spalling. Therefore, the tread condition of the wheel of the rail crane mechanism being accurately analyzed is of great importance to ensure the safe operation of the rail crane. Taking a rail crane in Guangzhou port as the research object, utilizing the rigid-flexible coupling multi-body dynamics method and acceleration period comparison algorithm, the numerical simulation was performed for the normal and tread spalling wheels respectively, for obtaining the stress and vibration acceleration of the wheel under corresponding conditions; an acceleration sensor was arranged at the wheel bearing seat to get the vibration acceleration of the wheel, which used to judge whether there was tread spalling. Finally, the reliability of the simulation model was verified by comparing the simulation results of wheel vibration acceleration with the measured results.
Journal of Sensor Technology and Application, Volume 10, pp 45-59; https://doi.org/10.12677/jsta.2022.101007
# 火力发电厂的“四大管道”长期处于高温高压的运行状态下，在机组的常年运行过程中，由于调峰等电力任务的存在，“四大管道”的管道会发生蠕变从而产生位移，因此需要对其进行监测进而保障机组运行安全。为了提高测量精度和降低测量用时，从而达到高精度三维管道位移实时监测的目的，提出了一种基于立体视觉与深度学习相结合的非接触式四大管道位移在线测量系统。该系统使用两台相机对固定于四大管道上的棋盘格标靶进行拍摄，捕获图像利用深度学习神经网络进行处理，无需单独对相机进行畸变矫正与双目矫正，实验室标定之后即可用于现场实际环境的测量。在实现了四大管道三维位移的高精度监测的同时，使得测量操作更加简洁、系统智能化程度进一步提高。实验结果表明：该系统测量的标准差小于0.24 mm，位移测量误差小于0.3%，单点测量时间小于0.1 s，是一套适用于四大管道高精度三维位移实时监测的测量系统。 The “four pipelines” of thermal power plant have been operating under high temperature and high pressure for a long time. During the perennial operation of the unit, due to the existence of peak shaving and other power tasks, the pipelines of the “four pipelines” will creep and produce displacement. Hence, the monitor of pipelines is needed to ensure the safe operation of the unit. A non-contact online measurement system is advanced in this paper to improve the measurement accuracy and reduce the measurement time, so as to achieve the purpose of high-precision three-dimensional pipeline displacement real-time monitoring. The system used two cameras to capture the chessboard grid target fixed on the four pipelines, and the captured image is processed by deep learning neural network, so that the system could be used in the measurement of actual environment without the process of distortion and binocular correcting of cameras after calibration in the laboratory. While realizing the high-precision monitoring of the three-dimensional displacement of the four pipelines, the measurement operation was more concise and the degree of system intelligence is further improved. The experimental results showed that the standard deviation of the system is less than 0.24 mm, the displacement measurement error is less than 0.3%, and the single point measurement time is less than 0.1 s. It was a set of measurement system suitable for high-precision three-dimensional displacement real-time monitoring of four pipelines.
Journal of Sensor Technology and Application, Volume 10, pp 31-36; https://doi.org/10.12677/jsta.2022.101005
# 为解决光波导器件耦合效率低、难以实现的问题，本文开展了集成光波导耦合技术的研究，设计了一种均匀光栅耦合器，采用时域有限差分法对光栅耦合器进行了仿真和优化。计算结果：光栅耦合器在耦合角度 = 20˚，刻蚀宽度w = 300 nm，刻蚀深度e = 70 nm，周期p = 660 nm时，该种光栅耦合器耦合效率达到57.2%。本文工作可为光栅耦合器的设计提供参考。 In order to solve the problem of low coupling efficiency and difficult realization of optical waveguide devices, we carried out the research of integrated optical waveguide coupling technology in this paper, designed a uniform grating coupler, simulated and optimized the grating coupler using finite difference time domain method. Calculation result: when the coupling angle = 20˚, the etching width w = 300 nm, the etching depth e = 70 nm, and the period p = 660 nm, the coupling efficiency of the grating coupler reaches 57.2%. The work of this paper can provide reference for the design of grating coupler.
Journal of Sensor Technology and Application, Volume 10, pp 1-6; https://doi.org/10.12677/jsta.2021.101001
# 生产实践、科学研究中存在着大量的微弱电流信号，对于高精密仪器而言，微弱电流信号的准确测量关系着仪器的正常使用情况。但因其值微弱，易受干扰影响，微弱电流的测量一直是人们在探讨和关注的焦点。本文介绍了目前微弱电流测量的发展现状和两种常用基本测量方法I-V变换法和I-F变换法的原理及其对比分析，并给出了两种测量方法在使用过程中提高测量性能的措施方法。 There are a large number of weak current signals in production practice and scientific research. For high-precision instruments, the accurate measurement of weak current signals is related to the normal use of the instrument. Because of its weak value and susceptibility to interference, the measurement of weak current has always been the focus of discussion and attention. This article introduces the current development status of weak current measurement and the principles and comparative analysis of the two common basic measurement methods current-to-voltage conversion method and current-to-frequency conversion method, and provides measures to improve measurement performance during the use of the two measurement methods.
Journal of Sensor Technology and Application, Volume 10, pp 16-23; https://doi.org/10.12677/jsta.2022.101003
# 为了解决核辐射应用场景里数字脉冲幅度分析模块在使用过程中CAN总线数据传输速率低的问题，设计了一款RJ45网络与CAN总线的透明传输模块。详细介绍了传输模块的硬件和软件设计，并通过基于QT平台开发的上位机软件进行实际测量，实现了能谱数据滤波显示。实验表明，RJ45网络与CAN总线的透明传输模块实现了两种不同通讯方式的跨接，保证了数据的可靠性，提高了数字脉冲幅度分析仪的传输速率。 In order to solve the problem of low CAN bus data transmission rate dur-ing the use of the digital pulse amplitude analysis module in nuclear radiation application scenari-os, a transparent transmission module of RJ45 network and CAN bus was designed. The hardware and software design of the transmission module are introduced in detail, and the actual measure-ment is carried out through the upper computer software developed based on the QT platform, and the energy spectrum data is filtered and displayed. Experiments show that the transparent trans-mission module of the RJ45 network and the CAN bus realizes the bridging of two different commu-nication methods, which ensures the reliability of the data and improves the transmission rate of the digital pulse amplitude analyzer.
Journal of Sensor Technology and Application, Volume 10, pp 24-30; https://doi.org/10.12677/jsta.2022.101004
# 本设计基于Arduino Nano开发板，以ATmega328p为最小系统核心的控制板，基于物联网平台，运用MTQQ协议而设计智能可穿戴救生设备。它通过佩戴者的心率、血氧含量、地理位置、所处环境湿度等信息进行综合测定与判断，当检测到佩戴者的生命体征等信息开始出现不正常的波动或存在向溺水状态靠近时，装置需要立刻将信息向手机客户端发送预警信号，弹出安全气囊，从而最大限度地减少溺水带来的意外事故。 This design is based on Arduino Nano development board, ATmega328p control board as the minimum system core, and based on the Internet of things platform, use MTQQ protocol to design intelligent wearable life-saving equipment. It comprehensively measures and judges the wearer’s heart rate, blood oxygen content, location, environmental humidity and other information. When it is detected that the wearer’s vital signs and other information begin to fluctuate abnormally or approach the drowning state, the device needs to immediately send an early warning signal to the mobile phone client to pop up the airbag, so as to minimize accidents caused by drowning.
Journal of Sensor Technology and Application, Volume 09, pp 216-225; https://doi.org/10.12677/jsta.2021.94026
通过对电容式原油含水率传感器的设计与分析、传感器信号驱动和调理电路的开发、含水率误差补偿及数据处理算法的研究，试制了一种新型全量程含水率测试仪。它的创新点是：利用有限元分析方法建立传感器电磁场仿真模型，对传感器电场和磁场参数进行分析，改变传感器尺寸和结构，实现性能优化；建立电容传感电路噪声传递模型，对各类噪声源进行分析，并采用误差抑制技术，提高电路信噪比，优化电路性能；研究原油含水率数据高精度标定算法，并针对现场监测需求，将标定算法内嵌入单片机系统，实现远端实时标定。 Through the design and analysis of capacitive crude oil water content sensor, the development of sensor signal drive and conditioning circuit, water content error compensation and data processing algorithm research, a new full range water content tester was trial-produced. Its innovative points are: using the finite element analysis method to establish a sensor electromagnetic field simulation model, analyze the sensor’s electric and magnetic field parameters, change the sensor’s size and structure and achieve performance optimization; establish a noise transfer model of capacitor sensing circuit, analyze various noise sources, and adopt error suppression techniques to improve the signal-to-noise ratio of the circuit and optimize the circuit performance; study the high-precision calibration algorithm of crude oil water content data, and embed the calibration algorithm into the single-chip system to achieve remote real-time calibration according to the needs of on-site monitoring.
Journal of Sensor Technology and Application, Volume 09, pp 241-246; https://doi.org/10.12677/jsta.2021.94029
基于微控制器的传感器检测系统具有多通道输出与输入、良好的人机交互性、可现场检测等优点，能够最大限度提升传感器的应用空间，因此成为传感器检测系统的主要发展方向之一。本文研制了基于STM32的差分型检测系统，可实现激励电压控制、量程选择、信号差分采集、数据实时显示与存储等功能。以pH敏感型液栅石墨烯场效应晶体管生化传感器为例，对检测结果进行线性拟合，拟合直线的斜率为−1.8，即被测溶液pH每变化1，该检测系统输出电流变化1.8 μA，线性相关系数R2 = 0.94。实验结果表明，该检测系统能够有效检测溶液pH，验证了系统的可行性。 The sensor detection systems based on the micro-controller have the advantages of multi-channel output and input, friendly human-machine interaction and field detection. They can expand the application space of the sensor to the maximum. Thus, they have become one of the main development direction of the sensor detection systems. In this work, a differential detection system based on STM32 is developed, which can realize the control of driving voltage, selection of range measure, acquisition of signal differential detection, real-time data display and storage. We take the pH sensitive liquid gate_graphene field effect transistor biochemical sensor as an example to verify the feasibility of the system. The results of differential detection were linearly fitted, with an slope of −1.8 and a linear correlation coefficient of R2 = 0.94. The pH of solution change of 1 can induce 1.8 μA in the output current of detection system. The experimental results show that the detection system is able to effectively detect the pH of solution.
Journal of Sensor Technology and Application, Volume 09, pp 226-233; https://doi.org/10.12677/jsta.2021.94027
为实现金属板厚度的实时检测以期及时修正避免误差积累，本文以STC89C52单片机为控制核心，研制基于差动式电容传感器的金属板厚度在线检测系统。该系统通过差动式变极距电容式传感器，实现金属板厚度信号的采集；进而用定时器产生矩形波，单片机在一定时间内计数，最后得出频率，计算出金属板厚度；为了达到随时观察的目的，在系统中辅以显示模块，便于在生产过程中出现特殊情况时，可以被用户发现并及时纠错。该系统能迅速的进行响应，以达到生产要求中的实时性，且成本较低，具有一定的应用价值。 In order to realize the real-time detection of metal plate thickness in order to correct it in time and avoid error accumulation, this paper develops an on-line metal plate thickness detection system based on differential capacitance sensor with STC89C52 single chip microcomputer as the control core. The system realizes the acquisition of metal plate thickness signal through differential variable pole distance capacitive sensor; then the rectangular wave is generated by the timer, and the single chip microcomputer counts in a certain time. Finally, the frequency is obtained and the thickness of the metal plate is calculated; in order to achieve the purpose of observation at any time, the display module is supplemented in the system, so that in case of special circumstances in the production process, it can be found by the user and corrected in time. The system can respond quickly to meet the real-time production requirements, and the cost is low, so it has a certain application value.