Design and experiment of automatic transplanting device for potted tomato seedlings

In this study, an automatic machine for transplanting potted tomato seedlings was designed, based on the analysis of physical characteristics of the main varieties of tomato seedlings. The machine is composed of a horizontal and vertical seedling supply mechanism, a picking mechanism composed with a gear-rod component, a planting part featured with an eccentric-disk parallelogram duckbilled mechanism, and a control system. The control system included position sensors, stepper motor, variable-frequency motor and program controller. The force condition for successful picking potted tomato seedlings was studied by analyzing the force and motion during the taking procedure with the use of analytical graphic method. Combined with the parameters of physical characteristics of tomato seedlings, the key parameters of the machine was determined, which included L1 = 105 mm as the distance between the point of the gripper needles and the center of rotation, L0 = 18 mm as the initial opening distance between the two gripper needles, and s = 40 mm as the distance between the two gripper needles when they were at the upper hinge point of the clamping hands. The key structure and the parameters of the seedlings-taking part were determined by theoretical calculation according to the position of the seedling during taking and dropping procedure, and the requirement of the motion. The machine was tested by using the potted tomato seedlings. The result showed that the seedling picking rate was 92.35%–86.61%, and the leakage rate was 12.57%–18.03%, when the transplanting speed was between 60 and 90 seedlings per minute. The result demonstrated that the machine was feasible to transplant the potted tomato seedlings efficiently.

Review of Ejection Seat Electronic Program Controller

Ejector seat program controller is the key device unfolded by the separation of the control people-seat and lifesaving parachute after the seat ejection from the machine, which is the main component of seat separation system. Compared with the mechanical program controller, electronic program controller has many advantages: small volume, light weight, time delay of high precision, good flexibility, strong power, easy to expand, the tremendous development potential and splendid testability. This paper respectively introduces the English MK series seats, American ACES series seat and Russian K-36Дseries seat electronic program controller, focusing on the TWZI type electronic program controller developed by China Aviation Life-saving Institute

Traffic Survey System Based on GPS, GPRS and GIS

Referring to research findings of existing traffic survey instrument, this paper bases on electronic traffic survey counter to insert GPRS module, micro-program controller, vehicle type selection keyboard and direction selection keyboard, and utilizes computer technology to establish data processing platform, studies and designs the traffic survey system on the basis of GPS, GPRS and GIS. This system can realize real-time monitoring on surveyors, accurate and timely transmission and processing of survey data, and automatic analysis and management of survey data.

Research on the Application of Micro-Program Controller in Parallel Neural Networks

In this paper a pipelined array of neurons based on the micro-program controller is proposed as the BP network control circuit implementations, without changing the hardware circuit under the premise of the way by increasing the instruction to meet the BP neural network parallel computing applications to enhance the flexibility of hardware.

Automated Determination of Salts in Water-Soluble Certifiable Color Additives by Ion Chromatography

A previously developed ion chromatographic method for the determination of salts in watersoluble certifiable color additives was automated, using a Model 12 Dionex ion chromatograph equipped with a program controller and programmable computing integrator. Programs were written for the program controller for continuous automated analysis of up to 59 samples in about 20 h, with periodic regeneration of the suppressor column and automatic shut-down. All data were processed through the integrator, programmed to give results in weight/weight percent. Recoveries were performed on 4 anions: chloride, phosphate, bromide, and sulfate. Twenty-five color additives could be analyzed by the method. Standard deviations in the determinations ranged from 0.01 to 0.16 at addition levels of 0.20–9.45; with 6 replications. Recoveries for addition levels of 0.2–5.0; with 2 replications fell within the range of 84.0–105.0;. Approximate lower limits of detection for each anion were as follows: chloride, 0.07;; phosphate, 0.10;; bromide, 0.06;; sulfate, 0.07;.