CN114812653A - Test method for automatically testing linearity - Google Patents
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- CN114812653A CN114812653A CN202210452183.5A CN202210452183A CN114812653A CN 114812653 A CN114812653 A CN 114812653A CN 202210452183 A CN202210452183 A CN 202210452183A CN 114812653 A CN114812653 A CN 114812653A
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- 238000012360 testing method Methods 0.000 title claims abstract description 108
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- 238000004364 calculation method Methods 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims description 22
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- 238000013101 initial test Methods 0.000 claims description 7
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- G—PHYSICS
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- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D18/00—Testing or calibrating apparatus or arrangements provided for in groups G01D1/00 - G01D15/00
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
Abstract
The invention relates to the field of linearity test, and discloses a test method for automatically testing linearity, which comprises the following steps: step 1: setting a basic linear test interval, and performing local division; step 2: setting the step diameter range of the optical power test; step 3: adjusting the light attenuation value to enable the light power to reach the target light power to be tested; step 4: adjusting the light attenuation value to enable the light power to reach the target light power to be tested, and repeating the steps for five times; step 5: if the difference between the light attenuation and the power value is smaller than the target value, the average value of the five times is used as the actual value of the light attenuation and the power, and the calibration calculation basis of the responsivity linearity test is generated. The invention has the advantages of high test efficiency, excellent adaptability to mass production, low production cost, convenient calibration measure, convenient test completion by the user through programming light attenuation and light power, test accuracy verification and qualified rate guarantee of finished products by adding the scheme capable of automatically testing the product linearity.
Description
Technical Field
The invention relates to the technical field of chip testing, in particular to a testing method for automatically testing linearity.
Background
The linearity is an important index for describing the static characteristics of a sensor product, the percentage of the maximum deviation between a sensor calibration curve and a fitting straight line and the output of a full scale is taken as the premise that the measured input quantity is in a stable state under a specified condition, the linearity is called, the smaller the value is, the better the linearity characteristic is, the accuracy is determined by the basic error limit and the influence quantity of the sensor, such as the change limit caused by temperature change, humidity change, power supply fluctuation, frequency change and the like, and the measurement can be carried out through optical power and optical attenuation during the measurement.
However, the existing test for products lacks a scheme for automatic testing, and the manual test has low efficiency and poor repeatability, cannot adapt to mass production, has high production cost, cannot provide convenient calibration measures, and also lacks measures for verifying the test accuracy.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects in the prior art, the invention provides a test method for automatically testing linearity, which can effectively solve the problems that the prior art is lack of a scheme for automatic testing, manual testing efficiency is low, repeatability is poor, mass production cannot be adapted, production cost is high, more convenient calibration measures cannot be provided, and measures for verifying testing accuracy are also lacked.
(II) technical scheme
In order to achieve the above objects, the present invention is achieved by the following technical solutions,
the invention discloses a test method for automatically testing linearity, which comprises the following steps:
step 1: setting a basic linear test interval, and performing local division;
step 2: setting the step diameter range of the optical power test;
step 3: adjusting the light attenuation value to enable the light power to reach the target light power to be tested;
step 4: adjusting the light attenuation value to enable the light power to reach the target light power to be tested, and repeating the steps for five times;
step 5: if the difference between the light attenuation and the power value is smaller than the target value, the average value of the five times is used as the actual value of the light attenuation and the power, and a calibration calculation basis of the responsivity linear test is generated;
step 6: adding a test product, and performing a linear automatic test of the responsiveness;
step 7: setting a deviation threshold value;
step 8: recording the optical power value of the tested product, and calculating the deviation value of the calibration value;
step 9: marking test products that exceed or fall below a deviation threshold;
step 10: performing random sampling inspection detection on the tested product;
step 11: and recording a test result and a production detection report.
Further, in the Step3, the light attenuation value is an instrument for adjusting the loss on the test optical path, where the loss is caused by absorption or element deformation during the transmission of light in the optical path.
Further, the responsivity in Step5, which is a physical quantity describing the photoelectric conversion capability of the device, is associated with the device material and the optical wavelength, and has a unit of R, and the magnitude of R is the ratio of the average output current Ip of the optical detector to the average input power Po of the optical detector, that is, the ratio of the magnitude of the output electrical signal current to the magnitude of the input optical signal power;
the formula is expressed as:
r = Ip/Po in units of a/W.
Further, the calibration calculation basis in Step5 is used as an important measure of the value of the product quality, and the calibration calculation basis is the maximum deviation from the actual calculation data under the specified conditions, on the premise that the measured input quantity is in the steady state.
Further, the setting manner of the deviation threshold in Step7 includes: manual online editing and software remote editing.
Further, the process of random sampling test in step10 includes the following steps:
s1: editing an algorithm and setting a random program;
s2: establishing two storage areas, and independently storing data of the product passing the test and the product failing the test;
s3: executing an algorithm, importing a random program into the two storage areas, and performing random selection;
s4: calling power measurement data of the selected product, and re-executing calculation of the deviation value;
s5: calling the selected product to participate in automatic testing again;
s6: marking products with deviation in numerical value;
s7: marking products with errors between the test results and the recorded results;
s8: and generating a detection report and submitting the report.
Further, in the random procedure in step S1, the uniform random bits are used as the auxiliary input to guide the behavior thereof, and the procedure performance will be a random variable determined by the random bits;
its running time or output is presented in the form of a random variable.
Furthermore, before the test product in step S2 participates in the test, an independent label is assigned, and the independent label is used as an index target and is entered into the storage area.
Further, the product in step S5 is re-engaged in the automatic test, and the tested product is re-called according to the label, so as to be secondarily engaged in the test in the initial engagement test state.
Further, the attributes of the detection report in step S8 include: initial test time, sample test time, deviation values, test error values and quantities.
(III) advantageous effects
Compared with the known public technology, the technical scheme provided by the invention has the following beneficial effects,
1. by adding the scheme of automatically testing the product linearity, the method has the advantages of high testing efficiency, good repeatability, excellent adaptability to mass production, low production cost, contribution to enlarging the production scale, capability of providing more convenient calibration measures, good calibration effect, high applicability, convenience for a user to complete automatic testing by programming light attenuation and light power, and convenience.
2. By adding the measure of verifying the test accuracy, the invention can randomly extract the tested product and the non-tested product, re-test the products in the initial test participation state, automatically verify the deviation value of the two tests, help the user to know the accuracy of the test mechanism in time, assist the user to re-calibrate in time, reduce the production loss and ensure the qualification rate of the finished product.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
FIG. 1 is a flow chart of a method for automatically testing linearity;
FIG. 2 is a schematic flow chart of a random sampling test process according to the present invention;
FIG. 3 is a schematic diagram illustrating an architecture of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The present invention will be further described with reference to the following examples.
Example 1
The testing method for automatically testing linearity in this embodiment, as shown in fig. 1 and fig. 3, includes the following steps:
step 1: setting a basic linear test interval, and performing local division;
step 2: setting the step diameter range of the optical power test;
step 3: adjusting the light attenuation value to enable the light power to reach the target light power to be tested;
step 4: adjusting the light attenuation value to enable the light power to reach the target light power to be tested, and repeating the steps for five times;
step 5: if the difference between the light attenuation and the power value is smaller than the target value, the average value of the five times is used as the actual value of the light attenuation and the power, and a calibration calculation basis of the responsivity linear test is generated;
step 6: adding a test product, and performing a linear automatic test of the responsiveness;
step 7: setting a deviation threshold value;
step 8: recording the optical power value of the tested product, and calculating the deviation value of the calibration value;
step 9: marking test products that exceed or fall below a deviation threshold;
step 10: performing random sampling inspection detection on the tested product;
step 11: and recording a test result and a production detection report.
As shown in fig. 1, in the Step3, the light attenuation value is an instrument for adjusting and setting the loss on the test optical path, where the loss is caused by absorption or element deformation during the transmission of light in the optical path.
As shown in fig. 1, the setting method of the deviation threshold value in Step7 includes: manual online editing and software remote editing.
This embodiment is when concrete implementation, can carry out the scheme of automatic test product linearity through the increase, and efficiency of software testing is high, and repeatability is good, adaptation volume production that can be fabulous, low in production cost is favorable to enlarging production scale to can provide comparatively convenient calibration measure, calibration effect is good, and the suitability is high, and the user of being convenient for accomplishes automatic test through programming light decay and luminous power, and is comparatively convenient.
Example 2
The embodiment further provides a process of random sampling test, as shown in fig. 2, including the following steps:
s1: editing an algorithm and setting a random program;
s2: establishing two storage areas, and independently storing data of the product passing the test and the product failing the test;
s3: executing an algorithm, importing a random program into the two storage areas, and performing random selection;
s4: calling power measurement data of the selected product, and re-executing calculation of the deviation value;
s5: calling the selected product to participate in automatic testing again;
s6: marking products with deviation in numerical value;
s7: marking products with errors between the test results and the recorded results;
s8: and generating a detection report and submitting.
As shown in fig. 2, in the random procedure in step S1, the uniform random bits are used as auxiliary input to guide its behavior, and the procedure performance will be a random variable, which is determined by the random bits;
its running time or output is presented in the form of a random variable.
As shown in fig. 2, before the test product in step S2 participates in the test, an independent tag is assigned, and the independent tag is used as an index target and is entered into the storage area.
As shown in fig. 2, the product in step S5 is re-engaged in the automatic test, and the tested product is re-called according to the label, so as to be secondarily engaged in the test in the initial engagement test state.
As shown in fig. 2, the attributes of the detection report in step S8 include: initial test time, sample test time, deviation values, test error values and quantities.
In the embodiment, when the method is specifically implemented, by adding the measure for verifying the test accuracy, random extraction can be performed on the product passing the test and the product failing the test, so that the test is performed again in the initial test participation state, the deviation value of the two tests is automatically verified, a user is helped to know the accuracy of the test mechanism in time, the user is helped to perform recalibration in time, the production loss is reduced, and the qualification rate of the finished product is ensured.
Example 3
In this embodiment, as shown in fig. 1, the responsivity in Step5 is a physical quantity describing the photoelectric conversion capability of the device, and the responsivity is associated with the material and the wavelength of light of the device, and is represented by R, and the magnitude of R is the ratio of the average output current Ip of the photodetector to the average input power Po of the photodetector, that is, the ratio of the magnitude of the current of the output electrical signal to the magnitude of the power of the input optical signal;
the formula is expressed as:
r = Ip/Po in units of a/W.
As shown in fig. 1, the calibration calculation basis in Step5 is an important measure of the value of the quality of the product, and the calibration calculation basis is the maximum deviation from the actual calculation data under the predetermined condition on the premise that the measured input quantity is in the steady state.
In conclusion, by adding the scheme capable of automatically testing the product linearity, the invention has the advantages of high testing efficiency, good repeatability, excellent adaptability to mass production, low production cost, contribution to enlarging the production scale, capability of providing more convenient calibration measures, good calibration effect, high applicability, convenience for users to complete automatic testing by programming light attenuation and light power, and convenience;
by adding the measure of verifying the test accuracy, the random extraction can be carried out on the product passing the test and the product not passing the test, the test is carried out again in the initial test participation state, the deviation value of the two tests is automatically verified, the user is helped to know the accuracy of the test mechanism in time, the user is helped to recalibrate in time, the production loss is reduced, and the qualification rate of the finished product is ensured.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (10)
1. A test method for automatically testing linearity is characterized by comprising the following steps:
step 1: setting a basic linear test interval, and performing local division;
step 2: setting the step diameter range of the optical power test;
step 3: adjusting the light attenuation value to enable the light power to reach the target light power generated to be tested;
step 4: adjusting the light attenuation value to enable the light power to reach the target light power to be tested, and repeating the steps for five times;
step 5: if the difference between the light attenuation and the power value is smaller than the target value, the average value of the five times is used as the actual value of the light attenuation and the power, and a calibration calculation basis of the responsivity linear test is generated;
step 6: adding a test product, and performing a linear automatic test of the responsiveness;
step 7: setting a deviation threshold value;
step 8: recording the optical power value of the tested product, and calculating the deviation value of the calibration value;
step 9: marking test products that exceed or fall below a deviation threshold;
step 10: performing random sampling inspection detection on the tested product;
step 11: and recording a test result and a production detection report.
2. The method as claimed in claim 1, wherein the light attenuation value in Step3 is an instrument for adjusting and setting the loss on the test optical path, and the loss is caused by absorption or element deformation during the transmission of light in the optical path.
3. The method as claimed in claim 1, wherein the responsivity in Step5 is a physical quantity describing the photoelectric conversion capability of the device, and the responsivity is related to the device material and the wavelength of light and has a unit of R, and the magnitude of R is the ratio of the average output current Ip of the photodetector to the average input power Po of the photodetector, i.e. the ratio of the magnitude of the output electrical signal current to the magnitude of the input optical signal power;
the formula is expressed as:
r = Ip/Po in units of a/W.
4. The method as claimed in claim 1, wherein the calibration calculation in Step5 is used as an important measure of the value of the quality of the product, and the calibration calculation is based on the maximum deviation from the actual calculation data under the specified conditions, on the premise that the measured input is in a steady state.
5. The method as claimed in claim 1, wherein the setting of the deviation threshold in Step7 comprises: manual online editing and software remote editing.
6. The method for testing linearity of claim 1, wherein the random check-out test in step10 comprises the following steps:
s1: editing an algorithm and setting a random program;
s2: establishing two storage areas, and independently storing data of the product passing the test and the product failing the test;
s3: executing an algorithm, importing a random program into the two storage areas, and performing random selection;
s4: calling power measurement data of the selected product, and re-executing calculation of the deviation value;
s5: calling the selected product to participate in automatic testing again;
s6: marking products with deviation in numerical value;
s7: marking products with errors between the test results and the recorded results;
s8: and generating a detection report and submitting.
7. The method as claimed in claim 6, wherein the random procedure in step S1 uses uniform random bits as auxiliary input to guide its behavior, and the procedure performance is a random variable determined by the random bits;
its runtime or output is presented in the form of a random variable.
8. The method according to claim 6, wherein the test product in step S2 is assigned with an independent label before being tested, and the independent label is used as an index target and is recorded in the storage area.
9. The method as claimed in claim 6, wherein the product in step S5 is re-tested, and the tested product is re-retrieved according to the label, and is secondarily tested in the initial test participation state.
10. The method as claimed in claim 6, wherein the attributes of the detection report in step S8 include: initial test time, sample test time, deviation values, test error values and quantities.
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