Equipment and Procedures to Measure Peanut Headspace Volatiles1

1987 ◽  
Vol 14 (2) ◽  
pp. 97-100 ◽  
Author(s):  
J. W. Dickens ◽  
A. B. Slate ◽  
H. E. Pattee
Keyword(s):  
Moisture Content ◽  
Ethyl Alcohol ◽  
Temperature Compensation ◽  
Compensation Circuit ◽  
Organic Volatiles ◽  
Good Agreement

Abstract An electronic meter was developed to measure the concentration of organic volatiles in the headspace over samples of comminuted peanuts. The meter consists of a commercially available semiconductor (Taguchi) and a temperature compensation circuit. The conductivity of the sensor increases in the presence of organic volatiles. Calibration of the meter can be made by measuring the volatiles in the headspace over known concentrations of ethyl alcohol in water. Good agreement between meter measurement of the concentration of organic volatiles in the headspace over samples of comminuted peanuts and the percent of freeze-damaged peanuts in the samples was demonstrated. Other tests with peanuts which were cured at 50 C or exposed to −1 C before curing demonstrated the meter can detect these types of objectionable flavors and indicated meter readings were not significantly affected by the moisture content of the peanuts.

Heat and Mass Diffusion Including Shrinkage and Hygrothermal Stress during Drying of Holed Ceramics Bricks

2011 ◽  
Vol 312-315 ◽  
pp. 971-976 ◽  
Author(s):  
J. Barbosa da Silva ◽  
G. Silva Almeida ◽  
W.C.P. Barbosa de Lima ◽  
Gelmires Araújo Neves ◽  
Antônio Gilson Barbosa de Lima
Keyword(s):  
Moisture Content ◽  
Three Dimensional ◽  
Average Moisture Content ◽  
Stress Distributions ◽  
Drying Process ◽  
Convective Boundary ◽  
Volume Method ◽  
Hygrothermal Stress ◽  
Thermo Physical Properties ◽  
Good Agreement

The Aim of this Work Is to Present a Three-Dimensional Mathematical Modelling to Predict Heat and Mass Transport inside the Industrial Brick with Rectangular Holes during the Drying Including Shrinkage and Hygrothermalelastic Stress Analysis. the Numerical Solution of the Diffusion Equation, Being Used the Finite-Volume Method, Considering Constant Thermo-Physical Properties and Convective Boundary Conditions at the Surface of the Solid, it Is Presented and Analyzed. Results of the Temperature, Moisture Content and Stress Distributions, and Drying and Heating Kinetics Are Shown and Analyzed. Results of the Average Moisture Content and Surface Temperature of the Brick along the Drying Process Are Compared with Experimental Data (T = 80.0oC and RH = 4.6 %) and Good Agreement Was Obtained. it Was Verified that the Largest Temperature, Moisture Content and Stress Gradients Are Located in the Intern and External Vertexes of the Brick.

Design of Ultrasonic Ranging Circuit Based on STC Microcontroller

2013 ◽  
Vol 722 ◽  
pp. 59-63
Author(s):  
Rui Luo ◽  
Zi Hong Zhang
Keyword(s):  
System Performance ◽  
Temperature Compensation ◽  
Measurement Accuracy ◽  
Environmental Temperature ◽  
Detection Distance ◽  
Compensation Circuit ◽  
High Measurement ◽  
Ultrasonic Ranging ◽  
Allowable Range ◽  
Market Promotion

In this paper, based on the 18B20 temperature compensation circuit for ultrasonic ranging circuit, can eliminate the influence of environmental temperature on ultrasonic velocity, this paper introduced the ultrasonic ranging system, the system includes ultrasonic transmitting circuit, receiving circuit and display circuit, the results of the experiment show that, the system detection distance can be up to 12M, the error is in the allowable range, the range finder the system performance is stable, high measurement accuracy, distance, has a certain practicality and market promotion value.

Temperature-compensation Circuit Techniques For High-density CMOS DRAMs

2005 ◽  
Author(s):  
Dong-Sun Min ◽  
Dong-Soo Jun ◽  
Sooin Cho ◽  
Yongsik Seok ◽  
Youngrae Kim ◽  
...  
Keyword(s):  
Temperature Compensation ◽  
High Density ◽  
Compensation Circuit ◽  
Circuit Techniques

Design of Automobile-Reversing Radar Control System Based on Ultrasonic

2013 ◽  
Vol 457-458 ◽  
pp. 872-877
Author(s):  
Yan Xin Yu ◽  
Rong Chun Sun
Keyword(s):  
Control System ◽  
Software Design ◽  
Temperature Compensation ◽  
Modular Design ◽  
Design Method ◽  
Main Program ◽  
Single Chip ◽  
Compensation Circuit ◽  
Program Module ◽  
Function Modules

Based on the principle of ultrasonic transit time ranging, this article describes that the microcontroller is used as the core to develop the ultrasonic distance-measurement automobile-reversing radar control system. The system includes both hardware and software parts. The hardware part mainly consist single-chip control circuit, ultrasonic transmitting and receiving circuits, temperature compensation circuit and voice alarm circuit. The software design part of the system was divided into several function modules with modular design method, such as main program module, temperature measurement module, voice alarm module and so on. The main program was responsible for dispatching management all the modules. Experiments show that this system can reach design requirement and has high value and broad application prospects.

An on-chip temperature compensation circuit for an InGaP/GaAs HBT RF power amplifier

2011 ◽  
Vol 32 (3) ◽  
pp. 035009
Author(s):  
Chengzhan Li ◽  
Zhijian Chen ◽  
Jiwei Huang ◽  
Yongping Wang ◽  
Chuanhui Ma ◽  
...  
Keyword(s):  
Power Amplifier ◽  
Temperature Compensation ◽  
Rf Power ◽  
Compensation Circuit ◽  
Rf Power Amplifier ◽  
Chip Temperature ◽  
On Chip

Ultrasonic Water Level Measurement System Based on GPS

2012 ◽  
Vol 459 ◽  
pp. 67-70 ◽  
Author(s):  
Gu Yu Li ◽  
Wei Zhu ◽  
Xian Cheng Wang
Keyword(s):  
Water Level ◽  
Measurement System ◽  
Temperature Compensation ◽  
Measurement Precision ◽  
Compensation Circuit ◽  
Specific Location ◽  
Gps Positioning ◽  
Level Measurement ◽  
Cycle Monitoring ◽  
Point Level

An Ultrasonic water level measurement system based on GPS is presented. According to the ultrasonic principle and GPS positioning technology, the secondary ultrasonic reflection in the air and the time spent in the liquid are measured to calculate the height of the water level and the depth of the liquid. The temperature compensation circuit is designed to improve the measurement precision. The use of GPS, the specific location of measurement points can be got, and the key position multi-point level measurement, cycle monitoring, real-time monitoring and mobile monitoring can be achieved

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