This part of YC/T 37 specifies the method for measuring the circumference of filter rods. This part is applicable to all kinds of filter rods. YC/T 37.2-2002 Determination of physical properties of filter rods Part 2: Circumference laser method YC/T37.2-2002 Standard download decompression password: www.bzxz.net

ICS65.160
Registration number: 10498--2002
Tobacco Industry Standard of the People's Republic of China
YC/T 37.2---2002
Replaces YC/T37.2-1996
Test of filters physical characteristics--Part 2.Circumference---Laser methodPublished on 2002-05-14
Published by the State Tobacco Monopoly Administration
Implementation on 2002-07-01
YC/T 37.2—2002
This part is the second part in the YC/T37 "Determination of physical properties of filter rods" series of standards. This series of standards consists of seven parts: Determination of physical properties of filter rods
Determination of physical properties of filter rods
Determination of physical properties of filter rods
Determination of physical properties of filter rods
Determination of physical properties of filter rods
Determination of physical properties of filter rods
Part 1: Length
Photoelectric method
Part 2: Circumference
Laser method
Part 3: Absorption resistance
Part 4: Hardness
Part 5: Moisture content
Part 6: Roundness
Determination of physical properties of filter rods
Part 7: Appearance
This part replaces YC/T37.2-1996 "Determination of physical properties of filter rods Part 2: Circumference photoelectric method".
Compared with YC/T37.2-1996, the main changes of this part are as follows: the method of measuring the circumference of filter rods by laser method is added; YC/T37.2-1996 is adjusted to Appendix B. Appendix A and Appendix B of this part are informative appendices. This part is proposed by the State Tobacco Monopoly Administration. This part is under the jurisdiction of the National Tobacco Standardization Technical Committee (TC144). Drafting unit of this part: China Tobacco Standardization Research Center. Main drafters of this part: Zhao Hang, Zhou Decheng, Li Xiaohui, Feng Xiaomin, Wang Yunfang The previous versions of the standard replaced by this part are: YC/T37.2--1996. 5.5.1
1 Scope
Determination of physical properties of filter rods
Part 2: Circumferential laser methodbzxz.net
This part of YC/T37 specifies the method for measuring the circumference of filter rods. This part is applicable to various filter rods.
2 Normative references
YC/T37.2—2002
The clauses in the following documents become clauses of this part through reference in this part of YC/T37. For any dated referenced document, all subsequent amendments (excluding errata) or revisions are not applicable to this part. However, parties that reach an agreement based on this part are encouraged to study whether the latest versions of these documents can be used. For any undated referenced document, the latest version applies to this part. GB/T16447 Atmospheric environment for conditioning and testing of tobacco and tobacco products (idtISO3402) 3 Principle
A laser beam is used to radially scan the effective measuring part of the filter rod to form an optical signal, which is received by the photoelectric receiving device and processed by the data processing system to give the diameter or circumference value of the sample. 4 Instruments and equipment
4.1 The laser circumference measuring instrument shall meet the following requirements: - Automatic sample feeding,
- Probe: During the measurement process, the sample rotates continuously by at least 180°; - Laser scanning system: During the rotation of the sample, the effective measuring part of the sample can be continuously scanned; - Photoelectric receiving device and data processing system; - The accuracy of the instrument measurement result is 0.01 mm. 4.2 Standard rod, with an accuracy of 0.005 mm. 5 Measurement steps
The sample shall be adjusted according to GB/T16447 and tested under corresponding environmental conditions. 5.1 Turn on the power and adjust the instrument according to the instrument operating procedures. 5.2 According to the specifications of the sample, select the standard push rod of the corresponding circumference and calibrate the instrument. 5.3 Place the sample in the measurement position so that the scanning position of the laser beam is located at the effective measuring part in the middle of the sample. 5.4 The photoelectric receiving device and data processing system give the sample diameter or circumference value. 5.5 Repeat steps 5.3 to 5.4 and test a total of 30 samples. 6 Results and indications
The results of the measurement are expressed as the average value of 30 measurements, accurate to 0.01mm. 555
YC/T 37.2—2002
Measurement report
The measurement report shall include the following contents:
The number of this part of YC/T37;
The mark and description of the sample;
The measurement time, the instrument used and the model; the environmental conditions of the measurement and the measurement results. 556
A.1 Principle
Appendix A
(Informative Appendix)
Measurement of the circumference of the filter rod by the belt drawing method
YC/T 37.2--2002
The measuring belt is wrapped around the sample for one circle, and the displacement when the measuring belt is wrapped around the sample under the action of a certain force is measured, thereby obtaining the circumference value of the sample.
A.2 Instruments and equipment
The belt-type circumference measuring instrument shall meet the following requirements: a) Measuring part
1) Measuring belt: made of light and flexible material, and should not stretch itself when subjected to force. 2) Force-applying device: make the force applied to the measuring belt constant and repeatable, and the force value can be selected between 0.60N and 1.00N.
3) Pulling device: make the measurement able to achieve constant speed contraction, and the speed is not higher than 20mm/s. Control the tightness of the measuring belt around the sample. In principle, the measuring belt should contact the sample, but should not be deformed by pressure. 4) Precision displacement sensor: range 20mm~30mm, accuracy 0.01mm. b) Recording device
c) - set of circumference standard rods: accuracy 0.005mm. A.3 Determination steps
Sample adjustment shall be carried out according to GB/T16447, and the test shall be carried out under the corresponding environmental conditions. A.3.1 Turn on the power supply and preheat it to make it stable. A.3.2 According to the specifications of the sample, select the corresponding standard rod and calibrate it according to the instrument operating procedures to make the instrument display value consistent with the nominal value of the standard rod.
A.3.3 Insert the sample into the measuring head so that the middle of the sample is located in the measuring ring of the measuring tape. A.3.4 Contract the measuring tape so that it just touches the sample. After the sensor output, the circumference value of the sample is obtained by the data processing device of the instrument. 557
YC/T37.2--2002
B.1 Principle
Appendix B
(Informative Appendix)
Measurement of filter rod circumference by photoelectric method
Use parallel light to radially project the effective measuring part of the filter rod, which is received by the photoelectric receiving device and processed by the data processing system to give the diameter or circumference value of the sample.
B.2 Instruments and equipment
B.2.1 The photoelectric circumference measuring instrument shall meet the following requirements: an optical system that can generate parallel light;
can continuously project the sample,
probe: during the measurement process, the sample continuously rotates at least 180%;-photoelectric receiving device and data processing system;-the accuracy of the instrument measurement result is 0.01 mm. B.2.2 Standard rod: the accuracy is 0.005mm. B.3 Measurement steps
Adjust the sample according to GB/T16447 and test under corresponding environmental conditions. B.3.1 Calibrate the instrument with a standard rod. B.3.2 Place the sample in the probe so that the parallel light shines on the effective measuring part in the middle of the sample. B.3.3 Project the sample while it rotates. The photoelectric receiving device and data processing system give the circumference value of the sample. B.3.4
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