Method and system for measuring dry rubber content in concentrated latex based on photoelectric sensor
A technology of photoelectric sensors and concentrated latex, which is applied in the measurement of scattering characteristics, etc., can solve the problems of heavy measuring equipment, expensive system equipment, troublesome measurement operations, etc.
Inactive Publication Date: 2009-09-16
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology
Although this method is relatively perfect in theory, there is a similar international standard ISO126:2005, but its measuring equipment is bulky, the measurement period is long, and it is destructive measurement, and the measurement operation is troublesome. The system equipment such as analytical balance and constant temperature boxes are expensive and require a skilled staff to use the instruments
[0006] Similarly, the high price of the microwave measurement system for dry rubber content in the above-mentioned concentrated latex makes some small rubber factories, research institutes, and rubber production gardens prohibitive, and the maintenance requirements are high and regular maintenance is required, because its After the calibration curve is used for a long time (1-2 years), various parameters will change, which will cause changes in the shape and width of the calibration curve, resulting in large errors in the detection process
No matter how you adjust the calibration points, the calibration curve cannot be pulled back to the standard position
Therefore, the calibration curve must be re-measured to ensure the accuracy of the test results, and the calibration of the calibration curve is relatively complicated
The capacitive sensor measurement method is still in the laboratory research and has not yet reached the commercial standard.
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[0062] Implementation example: Taking the measurement of dry rubber content in ordinary concentrated latex as an example, calibration is required before measuring samples with unknown concentrations. The calibration operation is very simple. Of course, only one calibration is required within a certain range, and it can be directly Measured. Configure standard concentration samples, the lowest concentration of dry glue content is 15%, the highest concentration of dry glue content is 45%, and the interval is 1%. The temperature of the experimental environment was 15 degrees Celsius. The amplification factor of the optical signal pre-amplification circuit is 1M, and the difference amplification factor of the two-stage de-temperature drift amplification circuit is 2. Set N in the data processing flow 1 =16,N 2 = 2,N 3 =4.
[0063] Such as figure 1 As shown in the system block diagram, when the standard sample to be measured is placed on the liftable stage 105, the light-emit...
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Abstract
The invention discloses a method and a system for measuring dry rubber content in a concentrated latex based on a photoelectric sensor, which are on the basis of photoelectric sensing technology, and relates to a physical structure of the photoelectric sensor, a processing flow of measured data of the dry rubber content in the concentrated latex and the whole system measurement stability. LEDs and photodiodes which are distributed in an annular mode are used as an in-out signal source of the photoelectric sensor; a liftable object table adjusts the measurement optical distance, and a multiple linear regression analysis method is adopted to process the measured data at the same time; and one path of reference signals are added to eliminate the influence of temperature drift on the system measurement stability. The method for measuring the dry rubber content in the concentrated latex based on the photoelectric sensor has the advantages of simple operation, rapid measurement, small system volume and convenient carrying.
Description
1. Technical field [0001] The method and system for measuring dry glue content in concentrated latex based on a photoelectric sensor according to the present invention is based on photoelectric sensing technology, and relates to a physical structure of a photoelectric sensor, the measurement data processing flow of dry glue content in concentrated latex and the entire process. The stability of the system is measured, in which LEDs and photodiodes in a circular distribution mode are used as the input and output signal sources of the photoelectric sensor, and the distance between the photosensitive module and the sample is adjusted through the lifting stage, and the multiple linear regression analysis method is used for processing Measurement data, and add a reference signal to eliminate the impact of temperature drift on system measurement stability. 2. Background technology [0002] Natural rubber is an important industrial raw material, which is extracted from rubber-contai...
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IPC IPC(8): G01N21/55G01N21/49
Inventor 赵志敏金小东俞晓磊张林刘磊
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS