CN111241491A - Mobile phone glass ink infrared transmittance testing device and repeatability algorithm - Google Patents
Mobile phone glass ink infrared transmittance testing device and repeatability algorithm Download PDFInfo
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- CN111241491A CN111241491A CN202010120509.5A CN202010120509A CN111241491A CN 111241491 A CN111241491 A CN 111241491A CN 202010120509 A CN202010120509 A CN 202010120509A CN 111241491 A CN111241491 A CN 111241491A
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- 238000002834 transmittance Methods 0.000 title claims abstract description 32
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Abstract
The invention relates to the technical field of infrared transmittance testing, in particular to a mobile phone glass ink infrared transmittance testing device and a repeatability algorithm, which sequentially comprise the following steps: step S1: n times of equal precision measurement are carried out on the infrared transmittance of the same mobile phone glass ink, and each measured value is x1,x2…xn(ii) a Step S2: calculating the average value of each measured value
Step S3: comparing the number of measurements n with a first predetermined value y1The size of (d); step S4: when the number of measurements n is greater than or equal to a first predetermined value y1Then, the standard deviation of the repeatability was calculated
When the number of times n of measurement is less than a first preset value y, establishing a range coefficient d, and selecting each measured value x1,x2… xn as xmaxSelecting each measured value x1,x2… xn as xminCalculating the standard deviation of the repeatability
Description
Technical Field
The invention relates to the technical field of infrared transmittance testing, in particular to a mobile phone glass ink infrared transmittance testing device and a repeatability algorithm.
Background
In order to understand the performance of the glass ink for mobile phones, the infrared transmittance needs to be tested. The test equipment has certain test errors, and how to calculate the test precision of the test equipment becomes an urgent problem to be solved in the industry.
Disclosure of Invention
The invention provides a mobile phone glass ink infrared transmittance testing device and a repeatability algorithm aiming at the problems in the prior art.
The invention adopts the following technical scheme: a repeatability algorithm for mobile phone glass ink infrared transmittance testing equipment comprises the following steps of: step S1: n times of equal precision measurement are carried out on the infrared transmittance of the same mobile phone glass ink, and each measured value is x1,x2…xn(ii) a Step S2: calculating the average value of each measured value
Step S3: comparing the number of measurements n with a first predetermined value y1The size of (d); step S4: when the number of measurements n is greater than or equal to a first predetermined value y1Then, the standard deviation of the repeatability was calculated
When the number of times n of measurement is less than a first preset value y, establishing a range coefficient d, and selecting each measured value x1,x2… xn as xmaxSelecting each measured value x1,x2… xn as xminCalculating the standard deviation of the repeatability
Preferably, in step S3, the first predetermined value y1＝10。
Preferably, in step S4, when n is 2, d is 1.13, when n is 3, d is 1.69, when n is 4, d is 2.06, when n is 5, d is 2.33, when n is 6, d is 2.53, when n is 7, d is 2.70, when n is 8, d is 2.85, when n is 9, d is 2.97, when n is 10, d is 3.08, when n is 11, d is 3.17, when n is 12, d is 3.26, and when n is 13, d is 3.34.
Preferably, in step S3, the first predetermined value y12; in step S4, when the number of measurements n is greater than the first predetermined value y1And is less than a second predetermined value y2Then, the standard deviation of the repeatability was calculated
Then, a correction factor M is established, and a repeatability standard deviation correction value δ' is calculated as M δ.
Preferably, in step S4, the second predetermined value y2＝10。
Preferably, in step S4, when n is 2, M is 1.25; when n is 3, M is 1.13, when n is 4, M is 1.09, when n is 5, M is 1.06, when n is 6, M is 1.05, when n is 7, M is 1.04, when n is 8, M is 1.04, when n is 9, M is 1.03, and when n is 10, M is 1.03.
Preferably, in step S4, when the number of measurements n is greater than or equal to the first predetermined value y, the standard deviation of repeatability is calculated
Thereafter, the average standard deviation of reproducibility was calculated
The invention also provides a mobile phone glass ink infrared transmittance testing device which comprises a testing device for measuring the mobile phone glass ink infrared transmittance and a computing device for operating the algorithm, wherein the output end of the testing device is connected with the input end of the computing device.
The invention has the beneficial effects that: and calculating the repeatability standard deviation by using different formulas according to different measurement times, so that the accuracy of the test result of the mobile phone glass ink infrared transmittance test equipment is reflected by the repeatability standard deviation.
Detailed Description
The present invention will be further described with reference to the following examples for facilitating understanding of those skilled in the art, and the description of the embodiments is not intended to limit the present invention.
A repeatability algorithm for mobile phone glass ink infrared transmittance testing equipment comprises the following steps of: step S1: n times of equal precision measurement are carried out on the infrared transmittance of the same mobile phone glass ink, and each measured value is x1,x2…xn(ii) a Step S2: calculating the average value of each measured value
Step S3: comparing the measurement times n with a first preset value y; step S4: when the number of measurements n is greater than or equal to a first predetermined value y1Then, the standard deviation of the repeatability was calculated
When the number of measurements n is less than a first predetermined value y1Then, a range coefficient d is established, and each measured value x is selected1,x2… xn as xmaxSelecting each measured value x1,x2… xn as xminCalculating the standard deviation of the repeatability
The measurement errors are caused by unstable readings of the test equipment or small changes of the position relation between the mobile phone glass and the test equipment, and the measurement errors have statistical regularity in terms of the whole. Most of the measurement errors are normally distributed, so that the standard deviation in the repeatability test can be used to know the test accuracy. So-called repeatability tests, i.e. multiple tests performed on the same object under the same conditions. Common methods for calculating the standard deviation include a range method and a Bessel formula, and because the range method only selects the maximum value and the minimum value for calculation, the accuracy of the range method is low when the measurement times are many. But the calculation method of the range method is simple, and when the method is used on mobile phone glass ink infrared transmittance testing equipment, the burden of hardware can be reduced. Thus in some implementationsIn the example, the method of calculation is selected according to the number of measurements. When the number of times of measurement is more, namely the number of times of measurement is more than or equal to the first preset value y1Then, the calculation is carried out by adopting a Bessel formula, namely the standard deviation of repeatability
When the number of measurements is small, i.e. the number of measurements is less than a first predetermined value y1Then, the calculation is carried out by a range difference method, namely, the standard deviation of repeatability
According to the statistical theory, the accuracy of the bessel formula is higher when the number of measurements is 10 or more, so in some embodiments, the first predetermined value y in step S31＝10。
In the case of the pole difference method, when n is 2, d is 1.13 in step S4; when n is 3, d is 1.69, when n is 4, d is 2.06, when n is 5, d is 2.33, when n is 6, d is 2.53, when n is 7, d is 2.70, when n is 8, d is 2.85, when n is 9, d is 2.97, when n is 10, d is 3.08, when n is 11, d is 3.17, when n is 12, d is 3.26, and when n is 13, d is 3.34.
In most tests, if the number of tests is large, the first predetermined value y in step S3 can be set12; at the moment, all the repeatability standard deviations delta are calculated by adopting a Bessel formula, and for the test with less test times, only correction is needed in the calculation process, so that a more accurate value can be obtained. Specifically, in step S4, when the number of times n of measurement is greater than the first predetermined value y1And is less than a second predetermined value y2Then, the standard deviation of the repeatability was calculated
Then, a correction factor M is established, and a repeatability standard deviation correction value δ' is calculated as M δ. When the precision of the test equipment is evaluated, the repeatability standard deviation correction value delta' is used as an evaluation value.
According to statistical theory, BesselThe formula is more accurate when the number of measurements is 10 or more, and it can be seen that the correction is required only when the number of measurements is 10 or less, and therefore, in step S4, the second predetermined value y is set to be higher than the first predetermined value y2＝10。
Specifically, in step S4, when n is 2, M is 1.25; when n is 3, M is 1.13, when n is 4, M is 1.09, when n is 5, M is 1.06, when n is 6, M is 1.05, when n is 7, M is 1.04, when n is 8, M is 1.04, when n is 9, M is 1.03, and when n is 10, M is 1.03.
If after the test, the average value of the measured values is used
As a result of the measurement, the average standard deviation of reproducibility should be used
To evaluate the accuracy of the test. Specifically, in step S4, when the number of measurements n is greater than or equal to the first predetermined value y, the standard deviation of repeatability is calculated
Thereafter, the average standard deviation of reproducibility was calculated
In some embodiments, the device comprises a testing device for measuring the infrared transmittance of the glass ink of the mobile phone and a computing device for running the algorithm, wherein the output end of the testing device is connected with the input end of the computing device. The existing testing equipment for the infrared transmittance of the mobile phone glass ink cannot display the testing precision, and a user cannot determine the reliability of a testing result. In the mobile phone glass ink infrared transmittance testing equipment, after the testing device measures the infrared transmittance of the same mobile phone glass ink for multiple times, the data which can be used for evaluating the testing precision of the equipment can be obtained by calculation in the equipment without the need of a user for carrying out additional calculation.
Although the present invention has been described with reference to the above preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. A repeatability algorithm for mobile phone glass printing ink infrared transmittance testing equipment is characterized in that: comprises the following steps which are carried out in sequence:
step S1: n times of equal precision measurement are carried out on the infrared transmittance of the same mobile phone glass ink, and each measured value is x1,x2…xn；
Step S2: calculating the average value of each measured value
Step S3: comparing the number of measurements n with a first predetermined value y1The size of (d);
step S4: when the number of measurements n is greater than or equal to a first predetermined value y1Then, the standard deviation of the repeatability was calculated
When the number of measurements n is less than a first predetermined value y1Then, a range coefficient d is established, and each measured value x is selected1,x2… xn as xmaxSelecting each measured value x1,x2… xn as xminCalculating the standard deviation of the repeatability
2. The repeatability algorithm for mobile phone glass ink infrared transmittance testing equipment according to claim 1, wherein: in step S3, the first predetermined value y1＝10。
3. The repeatability algorithm for mobile phone glass ink infrared transmittance testing equipment according to claim 1, wherein: in step S4, when n is 2, d is 1.13, when n is 3, d is 1.69, when n is 4, d is 2.06, when n is 5, d is 2.33, when n is 6, d is 2.53, when n is 7, d is 2.70, when n is 8, d is 2.85, when n is 9, d is 2.97, when n is 10, d is 3.08, when n is 11, d is 3.17, when n is 12, d is 3.26, and when n is 13, d is 3.34.
4. The repeatability algorithm for mobile phone glass ink infrared transmittance testing equipment according to claim 1, wherein: in step S3, the first predetermined value y1＝2；
In step S4, when the number of measurements n is greater than the first predetermined value y1And is less than a second predetermined value y2Then, the standard deviation of the repeatability was calculated
Then, a correction factor M is established, and a repeatability standard deviation correction value δ' is calculated as M δ.
5. The repeatability algorithm for mobile phone glass ink infrared transmittance testing equipment according to claim 4, wherein: in step S4, the second predetermined value y2＝10。
6. The repeatability algorithm for mobile phone glass ink infrared transmittance testing equipment according to claim 4, wherein: in step S4, when n is 2, M is 1.25; when n is 3, M is 1.13, when n is 4, M is 1.09, when n is 5, M is 1.06, when n is 6, M is 1.05, when n is 7, M is 1.04, when n is 8, M is 1.04, when n is 9, M is 1.03, and when n is 10, M is 1.03.
7. The repeatability algorithm for mobile phone glass ink infrared transmittance testing equipment according to claim 1, wherein: in step S4, when the number of measurements n is greater than or equal to the first predetermined value y1Then, the standard deviation of the repeatability was calculated
Thereafter, the average standard deviation of reproducibility was calculated
8. The utility model provides a cell-phone glass printing ink infrared ray transmittance test equipment which characterized in that: the device comprises a testing device for measuring the infrared transmittance of the mobile phone glass ink and a computing device for running the algorithm of any one of claims 1 to 7, wherein an output end of the testing device is connected with an input end of the computing device.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203849164U (en) * | 2013-06-14 | 2014-09-24 | 苏州耀宏光电科技有限公司 | Light path structure of spectrum transmittance measuring system |
| CN109990712A (en) * | 2019-03-28 | 2019-07-09 | 唐山钢铁集团有限责任公司 | A kind of width gage on-line calibration method |
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- 2020-02-26 CN CN202010120509.5A patent/CN111241491A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203849164U (en) * | 2013-06-14 | 2014-09-24 | 苏州耀宏光电科技有限公司 | Light path structure of spectrum transmittance measuring system |
| CN109990712A (en) * | 2019-03-28 | 2019-07-09 | 唐山钢铁集团有限责任公司 | A kind of width gage on-line calibration method |
Non-Patent Citations (2)
| Title |
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| 国家质量监督检验检疫总局: "JJF1059.1-2012《测量不确定度评定与表示》", 31 October 2013, 中国质检出版社, pages: 12 - 13 * |
| 李科杰: "《传感技术》", 30 November 1989, 北京理工大学出版社, pages: 11 - 12 * |
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Address after: Four village Tangxia town Guangdong city Dongguan province 523000 Dragon Street No. 2 Applicant after: Dongguan Jingbo photoelectric Co., Ltd Address before: Four village Tangxia town Guangdong city Dongguan province 523000 Dragon Street No. 2 Applicant before: DONGGUAN JINGBO PHOTOELECTRIC BIT COMPANIES |
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