Wenbin Zheng

Remote Automatic Meter Reading System

This paper designed a remote wireless automatic meter reading device to achieve the actual needs of users such as transform data as the set time, history report, monitoring status of the meters and so on. STM32 (32BitSTMicroelectronics Microcontroller) series single chips work well as the core control devices to satisfy the requirements, combined with surveillance cameras and a 3G wireless module to complete the hardware circuit design, which includes an STM32 control circuit, sensor data acquisition part, a 3G wireless module interface section, the analog video signal processing section and the analog video signal processing section. The software was designed according to the users’ needs, support multi-network system as well as upload pictures and parameters in time, the test results show that the device satisfied the requirements and could be used in the resource monitoring directly. This paper describes the overall design, the design of the hardware and software, calibrating device and testing device. Keywords—Remote Wireless Automatic Meter Reading (RWAMR), Multinetwork Standard, 3G, Smart City

Diagnosis method for corn nitrogen status measurement based on multispectral imaging

Monitoring the nitrogen status of corn crop has significant influence in rational fertilization, production expansion, and pollution (caused by excessive use of nitrogen fertilizer) reduction. In order to rapidly acquire corn nutrient information in the field, a nondestructive method of corn nitrogen content measurement was conducted based on multispectral imaging. The multi-spectral image monitoring system was deployed to acquire the canopy images of corn at jointing stage, and each samples nitrogen content was measured by AA3 continuous flow analyzer (CFA). 11 vegetation indices, including AVSR, AVSG, AVSNIR, NDVI, GNDVI, RVIR/G, RVIR/NIR, RVINIR/R, RNR, GNR and NIRNR, were calculated. Correlation analysis was then conducted to reduce the dimension of data so as to acquire 3 sensitive spectral characteristic parameters. The corn nitrogen nutrition diagnosis model at jointing stage was built with simple linear and polynomial regression method based on single sensitive spectral characteristic parameter. Moreover, the model was built with least squares multiple regression method with 3 sensitive spectral characteristic parameters. It was feasible to diagnose nitrogen content of corn based on multi-spectral images.

Single droplet on-line testing path optimization for digital microfluidic biochips based on the improved ant colony algorithm

Digital microfluidic biochip (DMFB) is an attractive platform for immunoassays, point-of-care clinical diagnostics, DNA sequencing, and other laboratory procedures in laboratory experiments due to its flexible application and low fabrication cost and further for the development of instruments. As being applied for these safe-critical applications, on-line testing methods are required to ensure robust DMFB operation and high confidence in the outcome of experiments. Prior work on DMFB testing paid little attention to on-line testing which test droplet will also work during bioassay, but its necessary and important because some defects may manifest during field operation. So we proposed a new heuristic way by improved ant colony algorithm (IACA) to get the optimal routing path under fluidic constraints. Both static and dynamic fluidic constraints are considered in our testing method. The simulation results showed our method is convergent and could be applied in various operations to reduce about 5% testing time.

Design of the AXIe instrument module interfacing component

AXIe is a new standard for test and measurement. It provides an open, high-performance platform for instrument module. In order to reduce the complexity of developing AXIe instrument module, the authors designed an interface component by taking a FPGA as core controller. The component implements an AXIe interface and two High Speed Mezzanine Card (HSMC) interfaces which are used to connect different functional modules. The Qsys tool is introduced into logic design to present a series of interface subsystems aiming at various applications. Using the suite, designers could skip the AXIe interface design and focus on the design of modules function. In addition, designers can also take advantage of the commercial off-the-shelf(COTS) HSMC modules, which will be help establishing an automatic test system rapidly.