Papers by Keyword: Detection System

Abstract: A non-enzymatic glucose sensing nanomaterial which consists of the NiCo₂O₄ nanosheets grown on reduced graphene oxide (NiCo₂O₄@rGO) is synthesized by a simple co-precipitation procedure. Firstly, the morphology and composition of the NiCo₂O₄@rGO are analyzed. Subsequently, the glucose sensing characteristics of the NiCo₂O₄@rGO are researched by Cyclic Voltammetry and Amperometry. The test results show that the prepared NiCo₂O₄@rGO has excellent glucose sensing properties. In the two linear detection range of 0.01mM-5.50mM and 5.50mM-15.50mM, the sensitivity reaches 4372.9μA·mM^-1cm^-2 and 1686.1μA·mM^-1cm^-2, respectively. In addition, in order to reduce the cost of electrochemical testing and improve the convenience and practicability of detection, a portable potentiostatic glucose detection system based on three electrodes is designed. Through testing, it is found that the non-enzymatic glucose detection system based on NiCo₂O₄@rGO has good practical application potential in the field of glucose detection.

Abstract: To realize rapid detection and evaluation of environmental-related information of the outdoor environment, this paper presents a portable environmental information detection system based on multi-sensor integration, wireless communication technology and virtual instrument technology. It can realize real-time detecting and evaluating parameters of air, acoustic, water and soil. Meanwhile, it is also able to record the longitude and latitude value, map and pictures of the location that data acquired. Moreover, modular structure design is adopted in the system, so the data processing modular can be applied in other evaluation systems as an analysis tool. Also, new function modules can also be added in the system to meet the needs of more features.

Abstract: In view of the casting defects of the automobile engine cylinder, the automatic detection technology for the surface defects of cylinder was investigated in this study. Moreover, a system was designed to automatically detect the surface defects of engine cylinder bore basing on machine vision technology. The pixels of the bottom circle and top circle of cylinder bore were effectively extracted using a Hough transform-based fast detection circle algorithm; Aiming to solve the inconvenience in observation and measurement as well as the obvious geometric distortion presented in annular image, an algorithm, in which annulus was extended into rectangular, was put forward. Experiment results proved that this algorithm was fast and efficient and showed lower mean error in calculating annular defect area.

Abstract: In this study, a set of real-time PCR primers for the detection of aflatoxin in peanut was successfully designed according to the AFLR gene of Aspergillus niger. Upstream primer was 5'-AACCTGATGACGACTGATAT-3'; Downstream primer was 5'-AGCACCTTGAGAACGATAA-3'; The real-time PCR detection system established in this study had good specificity, and the sensitivity of DNA detection can reach 3×10^-13 ng/ul. The correlation coefficient between the contents of aflatoxin in peanut samples and PCR Ct of Real-time was-0.718, and the correlation coefficient was significantly negative.

Abstract: Aim at solving the electricity customer unclear ownership problems in some old city area, the transformer region customer information detection system was designed, using low voltage power line carrier (PLC) technology to detect transformer of the connectivity of concentrator and the collector within their respective jurisdictions, and further determined the dependencies of the electric power customer and concentrator, displayed results in the information management server. The system consists of the customer information detection terminal and the customer information management software. The experimental results show that the system can actually solve the issues of mixed customer information under the complex line loss problem.

Abstract: With the development of computer technology, the intelligent technology and the virtual instrument technology is becoming more and more important in the testing field, the radar automatic detection system described in this article concludes virtual instrument system, detection platform and troubleshooting software. The system can individually and comprehensively and quickly check the performance of the equipment for automatic diagnosis, greatly improving the technical support capabilities of the equipment. Functionally, it can be easily expanded and upgraded, with a high value of promotion and application prospects.

Abstract: A sewage detection system based on large-scale embedded microcontroller was designed. With the increasing national environmental control requirements, the existing detection methods have been unable to meet the emissions compliance requirements. It is necessary to adopt new detection technologies for faster, more stable and reliable sewage discharge test results. This paper uses an embedded microcontroller technology for chemical plant wastewater discharge testing, which can effectively control the quality of effluent discharge, meet environmental requirements, and achieve stable production, energy saving purposes. Practice has proved that, sewage detection system based on large-scale embedded microcontroller has a strong monitoring capabilities.

Abstract: Immunoglobulin G (IgG) is one of the most important factors in diagnosing some diseases in clinic. A novel biosensor for dectection of IgG based on light-addressable potentiometric sensor (LAPS) was presented in this paper. The LAPS measurement system included the LAPS sensor, light source, the electrode and the electrochemical workstation. The LAPS sensor was fabricated by the method of the Layer-by-Layer Self-Assembly (LBL-SA). The IgG antibody modified onto the silicon wafer of LAPS to capture the corresponding antigen by the specific immune response which has an effect on the sensitive of LAPS to change the photocurrent. The laser diode (LD) light source of 890 nm wavelength was chose as illuminant to drive the LAPS to create the photocurrent. A FPGA was introduced to control the LD and generate a sine wave signal with the special frequency. Different concentration of IgG arranged 50-150μg/mL was detected by the LAPS system. A calibration curve that represented linear correlation between the bias voltage values and theconcentration of IgG was illustrated, and the linear correlation coefficient was 0.9943. This new biosensor can be very useful for detection of IgG based on the LAPS principle.

Abstract: A portable detection system is designed for solving the problems of too many individual equipment, great difficulty in detection and lack of special detection and repair equipment. This system have the functions of fault detection, fault locating and repair instruction, so its detection functions are better, especially suitable for field work. Through experiments, it is found that the system has the advantages of high degree of automation, openness and quick detection and can adapt to the need of repair.

Abstract: The precision of vehicle speedometer directly influenced traffic safety, in order to ensure its reliable work, the speedometer precision must be tested regularly. During the current vehicle speed detection practice, the tested vehicle wheel was driven by the roller and the slippage between the roller and vehicle wheel was not calculated, therefore a great error came into being in the detection result for the vehicle with rear-place, rear-drive and the speed signal getting from the front wheel, aimed at this circumstance and based on analyzing vehicle speed test principle, the speed sensor and data acquisition card were chosen, and a vehicle speed detection system was improved by appling NI LabVIEW software in the paper, which had overcome the shortage of the traditional vehicle speed test principle, When being applied in detection practice, it could improve the accuracy and pass-rate of vehicle speed detection.