CN109186940B - Monitoring method and monitoring device for testing precision - Google Patents
Monitoring method and monitoring device for testing precision Download PDFInfo
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- CN109186940B CN109186940B CN201810866091.5A CN201810866091A CN109186940B CN 109186940 B CN109186940 B CN 109186940B CN 201810866091 A CN201810866091 A CN 201810866091A CN 109186940 B CN109186940 B CN 109186940B
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
Abstract
A monitoring method for testing accuracy comprises the following steps: selecting a detection sample, wherein the detection sample is a qualified product; erecting a plurality of SFR detection machines according to a preset detection environment, detecting a detection sample by the plurality of SFR detection machines, outputting a detection result, and selecting a qualified SFR detection machine according to the detection result, wherein the qualified SFR detection machine is used for detecting a module product to be detected; and setting point inspection time, detecting the module product to be detected by utilizing a plurality of qualified SFR detection machines, timing, and when the working timing of the qualified SFR detection machines reaches the point inspection time, sending an alarm and stopping working by the qualified SFR detection machines. The monitoring method for the test precision can conveniently find the problematic SFR detection machine; and adjusting unqualified SFR detection machines in time to achieve the purpose of monitoring. The invention also provides a monitoring device for testing precision.
Description
Technical Field
The invention relates to the technical field of optical testing of lenses, in particular to a monitoring method and a monitoring device for testing precision.
Background
With the growing market of smart phones, the mobile phone camera modules gradually develop towards high pixels, and most people are now used to record life by using the camera of the mobile phone instead of a common traditional camera and directly share the life to the internet through the mobile phone. Therefore, the quality of a camera module is also a judgment basis for selecting the smart phone, but the quality of the camera module needs to be scientifically checked, and the efficiency of the camera module is generally scientifically evaluated by utilizing two important indexes: resolution and contrast. The resolution, also called resolution and discrimination rate, is essentially the ability of the camera module to reproduce the details of the object, and the higher the resolution of the camera module, the clearer the image. Currently, the detection methods for the resolution of the camera module often include MTF (modulation transfer function), SFR (spatial frequency response) and CTF (contrast transfer function).
Taking SFR as an example, in the existing SFR testing process, SFR testing machines are easily affected by the testing environment, such as the levelness of an image, the photographing distance, etc., and in order to ensure that the product detected by the SFR testing machines meets the requirements of customers, the testing environments of multiple SFR testing machines in a factory are generally set to be consistent, but the SFR testing machines are easily subject to many problems, for example, the testing environment is easily changed due to the loss of the testing machines or human negligence, etc., which causes the SFR testing machines to have inaccurate testing, and the testing environments cannot be found and monitored in time in the factory at present, which causes the product not meeting the customer standards to flow out, which causes complaints; when the same batch of modules are detected by different machines, the SFR test results of the machines are inconsistent, the SFR score difference is more than 6 points, the machine difference is large, the stability is poor, and no test software or standard evaluation method for testing and detecting the environmental stability exists, so that the NG and first pass test rate of the SFR test results is low.
Disclosure of Invention
In view of this, the present invention provides a method and a device for monitoring test accuracy, which can conveniently find out the problematic SFR detection machine; and the unqualified SFR detection machine is adjusted in time, so that the purpose of monitoring can be achieved.
A monitoring method for testing precision comprises the following steps:
selecting a detection sample, wherein the detection sample is a qualified product;
erecting a plurality of SFR detection machines according to a preset detection environment, detecting a detection sample by the plurality of SFR detection machines, outputting a detection result, and selecting a qualified SFR detection machine according to the detection result, wherein the qualified SFR detection machine is used for detecting a module product to be detected;
and setting point inspection time, detecting the module product to be detected by utilizing a plurality of qualified SFR detection machines, timing, and when the working timing of the qualified SFR detection machines reaches the point inspection time, sending an alarm and stopping working by the qualified SFR detection machines.
In a preferred embodiment of the present invention, when the qualified SFR inspection machine detects that the module product to be tested reaches the point inspection time, the qualified SFR inspection machine is used to inspect the inspection sample, and if the inspection sample is found to be qualified, it is indicated that the qualified SFR inspection machine still remains qualified, and the predetermined inspection environment of the qualified SFR inspection machine does not change; if the detected sample is unqualified, the qualified SFR detection machine is judged to be unqualified, and the preset detection environment of the SFR detection machine is changed, the preset detection environment of the qualified SFR detection machine is adjusted until the qualified SFR detection machine shows to be qualified.
In a preferred embodiment of the present invention, the step of selecting a test sample comprises:
providing a group of module products, detecting the module products, and selecting qualified products;
and (3) detecting the qualified products by the client under a preset detection environment, and selecting the module products detected as qualified by the client as detection samples.
In a preferred embodiment of the present invention, the selecting the qualified product from the group module products specifically comprises: setting a preset detection environment, a qualified standard value and a preset measurement error according to the requirements of a client, and when a first detection result obtained by detection in the preset detection environment is within the range of the preset measurement error compared with the qualified standard value, indicating that the module product is a qualified product, otherwise, indicating that the module product is an unqualified product;
the customer selects a detection sample from the qualified products as follows: and (3) detecting the qualified product by the client in a preset detection environment, and when the obtained second detection result is within a preset measurement error range compared with the qualified standard value, indicating that the module product is the qualified product.
In a preferred embodiment of the present invention, the step of erecting a plurality of SFR detection stations according to a predetermined detection environment, detecting a detection sample by the plurality of SFR detection stations, outputting a detection result, and selecting a qualified SFR detection station according to the detection result specifically includes: and detecting the detection samples by adopting a plurality of SFR detection machines, wherein the SFR detection machines are qualified when the detection samples are qualified products, and the SFR detection machines are unqualified when the detection samples are unqualified products.
In a preferred embodiment of the present invention, the step of selecting a qualified SFR inspection machine according to the inspection result of the SFR inspection machine on the inspection sample specifically includes: and detecting the detection sample by using an SFR detection machine and obtaining a third detection result, wherein when the third detection result of the detection sample detected by the SFR detection machine is in a preset measurement error range compared with a qualified standard value, the SFR detection machine is qualified, and otherwise, the SFR detection machine is unqualified.
The invention also provides a monitoring device for testing precision, which comprises the following components:
the selection unit is used for selecting a detection sample, and the detection sample is a pre-selected qualified product;
the detection unit is used for erecting a plurality of SFR detection machines according to a preset detection environment, detecting a detection sample by the plurality of SFR detection machines and outputting a detection result, so that qualified SFR detection machines are judged and selected according to the detection result;
and the point inspection unit is used for recording the working time of the detection unit and sending out alarm information when the qualified SFR detection machine table working timing reaches the point inspection time.
In a preferred embodiment of the present invention, the monitoring device for testing precision includes an execution unit, configured to select a machine that has a changed predetermined testing environment of a qualified SFR testing machine, when the qualified SFR testing machine tests a module product to be tested for a point-to-point testing time, the qualified SFR testing machine tests a testing sample, and if the testing sample is a qualified product, the qualified SFR testing machine is still qualified, and the predetermined testing environment of the qualified SFR testing machine has not changed; and if the detected sample is found to be a non-conforming product, the qualified SFR detection machine is determined to be non-conforming, and the preset detection environment of the qualified SFR detection machine is changed.
In a preferred embodiment of the present invention, the selecting unit is configured to select a detection sample from the module products, provide a set of module products, and select a qualified product from the module products; the customer selects a detection sample from qualified products.
In a preferred embodiment of the present invention, the monitoring apparatus for testing precision further includes a determining unit, configured to determine whether the plurality of SFR testing machines are qualified or unqualified, and detect the testing sample by using the plurality of SFR testing machines, where the SFR testing machines are qualified if the testing sample is qualified, and the SFR testing machines are unqualified if the testing sample is unqualified.
The monitoring method for the test precision utilizes the detection sample to monitor the SFR detection machine, so that the problem SFR detection machine can be conveniently found; adjusting unqualified SFR detection machines in time to achieve the purpose of monitoring; the SFR detection machine can be adjusted in a targeted manner according to the form, so that the efficiency is improved; for the preset detection environment of the SFR detection machine, the standard is set when the SFR detection machine is erected; for the detection of a new product, the method is favorable for finding out unstable factors which change in the preset detection environment of the new product.
Drawings
Fig. 1 is a schematic flow chart of a method for monitoring test accuracy according to the present invention.
Fig. 2 is a schematic structural diagram of the monitoring apparatus for testing accuracy according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be further described with reference to the accompanying drawings.
Fig. 1 is a schematic flow chart of a method for monitoring test accuracy according to the present invention. As shown in fig. 1, the method for monitoring the test accuracy includes the following steps:
and step S1, selecting a detection sample, wherein the detection sample is a qualified product. Specifically, step S1 specifically includes: and S11, providing a group of module products, detecting the module products, and selecting qualified products. Specifically, selecting qualified products from a group of module products is as follows: and selecting according to a preset detection environment, a qualified standard value and a preset measurement error set by a client requirement, wherein when a first detection result obtained by detection in the preset detection environment is within a preset measurement error range compared with the qualified standard value, the module product is qualified, and otherwise, the module product is unqualified. In the present embodiment, the predetermined detection environment mainly includes: the levelness of the photographed image and the SFR detection machine, the illumination intensity during photographing and the photographing distance between the camera and the image.
In this embodiment, the module product includes the excellent product, certified products and defective work, selects three kinds of products of excellent product, certified products and defective work to detect, explains that three kinds of products all can appear the same measuring error when detecting, can guarantee to detect and can go on under same condition, eliminates because the influence of the different measuring error that appears of product kind, causes the testing result to be accurate inadequately.
And S12, detecting the qualified products by the client under the preset detection environment, and selecting the qualified products detected as qualified by the client as detection samples. Specifically, the customer selects the detection samples in the qualified products as follows: and (3) detecting the qualified product by the client in a preset detection environment, and when the obtained second detection result is within a preset measurement error range compared with the qualified standard value, indicating that the module product is the qualified product.
And step S2, erecting a plurality of SFR detection machines (SFR is a method for measuring the image resolution of the camera) according to a preset detection environment, detecting the detection sample by the plurality of SFR detection machines, outputting a detection result, and selecting qualified SFR detection machines according to the detection result, wherein the qualified SFR detection machines are used for detecting the module product to be detected. Specifically, a plurality of SFR detection machines are adopted to detect detection samples, the SFR detection machines are qualified when the detection samples are qualified products, the SFR detection machines are unqualified when the detection samples are unqualified products, specifically, the SFR detection machines are adopted to detect the detection samples and obtain a third detection result, and the SFR detection machines are qualified products when the third detection result of the SFR detection machines detecting the detection samples is within a preset measurement error range compared with the qualified standard value, otherwise, the SFR detection machines are unqualified products.
And step S3, setting point inspection time, inspecting the module product to be inspected by utilizing a plurality of qualified SFR inspection machines, timing, and when the working timing of the qualified SFR inspection machines reaches the point inspection time, alarming and stopping working by the qualified SFR inspection machines. In this embodiment, the spot inspection time is set to 12 hours, but not limited to this, the SFR detection apparatus includes an alarm device, the detection software controls the alarm device, when the duty of the SFR detection apparatus reaches the spot inspection time, the detection software controls the alarm device to send out an alarm, and the SFR detection apparatus stops working.
Step S4, when the qualified SFR detection machine detects that the module product to be detected reaches the point detection time, the qualified SFR detection machine is adopted to detect the detection sample, if the detection sample is qualified, the qualified SFR detection machine still keeps qualified, and the preset detection environment of the qualified SFR detection machine does not change; and if the detected sample is unqualified, the qualified SFR detection machine is judged to be unqualified, and the preset detection environment of the qualified SFR detection machine is changed, so that the preset detection environment of the qualified SFR detection machine is adjusted until the qualified SFR detection machine shows to be qualified. The method for judging the qualification of the SFR detection machine is as follows: when the SFR detection machine detects a detection sample, the SFR detection machine generates a detection result, and if the absolute value of the difference value between the detection result and the qualified standard value is within the preset measurement error range, the SFR detection machine is qualified; and if the absolute value of the difference between the detection result and the qualified standard value is not within the preset measurement error range, the SFR detection machine is unqualified. In this embodiment, in order to facilitate the adjustment of the SFR detection machine by the staff, the predetermined detection environment is made into a form, and the form mainly includes the levelness of the photographed image and the SFR detection machine, the illumination intensity during photographing, and the specific numerical value of the photographing distance between the camera and the image.
In this embodiment, the monitoring method for the test precision is implemented by using a monitoring system for the test precision, where the monitoring system for the test precision includes a detection sample and an SFR detection machine, the SFR detection machine detects the detection sample, and detection software is installed in the SFR detection machine and used to determine detection data generated by the SFR detection machine and output a detection result. Developing a logic judgment program according to the predetermined measurement error, and writing the logic judgment program into the detection software, wherein the logic judgment program has the following principle: when the absolute value of the difference value between the detection value of the SFR detection machine and the qualified standard value stored in the SFR detection machine is within a preset measurement error range, the module product to be detected is qualified; and when the absolute value of the difference value between the detection value of the SFR detection machine and the qualified standard value stored in the SFR detection machine is not in the preset measurement error range, the module product to be detected is unqualified.
The monitoring method for the test precision utilizes the detection sample to monitor the SFR detection machine, so that the problem SFR detection machine can be conveniently found; adjusting unqualified SFR detection machines in time to achieve the purpose of monitoring; the SFR detection machine can be adjusted in a targeted manner according to the form, so that the efficiency is improved; for the preset detection environment of the SFR detection machine, the standard is set when the SFR detection machine is erected; for the detection of a new product, the method is favorable for finding out unstable factors which change in the preset detection environment of the new product.
Fig. 2 is a schematic structural diagram of the monitoring apparatus for testing accuracy according to the present invention. The invention also provides a monitoring device 100 for testing precision, as shown in fig. 2, the monitoring device 100 for testing precision comprises a selecting unit 101, a detecting unit 102, a point detecting unit 103, an executing unit 104 and a judging unit 105. The selecting unit 101 is used for selecting a detection sample, the detection sample is a pre-selected qualified product, specifically, the selecting unit 101 is used for selecting the detection sample from the module products, providing a group of module products, selecting the qualified product from the module products, and selecting the detection sample from the qualified product by a customer; the detection unit 102 is configured to erect a plurality of SFR detection machines according to a predetermined detection environment, detect a detection sample by the plurality of SFR detection machines, and output a detection result, thereby determining to select a qualified SFR detection machine according to the detection result; the point inspection unit 103 is used for recording the working time of the detection unit and sending out alarm information when the qualified SFR detection machine working timing reaches the point inspection time; the execution unit 104 is configured to select a qualified SFR detection machine that has a changed predetermined detection environment, detect a detection sample with the qualified SFR detection machine when the qualified SFR detection machine detects that the module product to be detected reaches the point inspection time, and if the detection sample is a qualified product, indicate that the qualified SFR detection machine is still qualified, and the predetermined detection environment of the qualified SFR detection machine does not change; if the detected sample is found to be an unqualified product, the qualified SFR detection machine is turned into an unqualified one, and the preset detection environment of the qualified SFR detection machine is changed; the judging unit 105 is configured to judge whether the plurality of SFR detection machines are qualified or unqualified, detect the detection sample by using the plurality of SFR detection machines, determine that the SFR detection machine is qualified when the detection sample is a qualified product, and determine that the SFR detection machine is unqualified when the detection sample is an unqualified product.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention. The various features described in the foregoing detailed description may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.
Claims (10)
1. A monitoring method for testing precision is characterized by comprising the following steps:
selecting a detection sample, wherein the detection sample is a qualified product;
erecting a plurality of SFR detection machines according to a preset detection environment, detecting the detection sample by the plurality of SFR detection machines, outputting a detection result, and selecting a qualified SFR detection machine according to the detection result, wherein the qualified SFR detection machine is used for detecting a module product to be detected;
setting point inspection time, utilizing the qualified SFR detection machines to detect the module product to be detected, timing, when the working timing of the qualified SFR detection machines reaches the point inspection time, sending an alarm by the qualified SFR detection machines and stopping working, adopting the qualified SFR detection machines to detect the detection sample, and if the detection sample is qualified, indicating that the qualified SFR detection machines still keep qualified, and ensuring that the preset detection environment of the qualified SFR detection machines does not change.
2. The method for monitoring the testing accuracy of claim 1, wherein when the qualified SFR testing machine detects the module to be tested for the point-testing time, the qualified SFR testing machine is used to test the testing sample, if the testing sample is found to be a non-qualified product, the qualified SFR testing machine becomes a non-qualified product, and the predetermined testing environment of the qualified SFR testing machine has changed, the predetermined testing environment of the qualified SFR testing machine is adjusted until the qualified SFR testing machine is qualified.
3. The method for monitoring the accuracy of measurement according to claim 1, wherein the step of selecting the test sample comprises:
providing a group of module products, detecting the module products, and selecting qualified products;
and the client detects the qualified products in the preset detection environment, and selects the module products detected as qualified by the client as detection samples.
4. The method for monitoring the test accuracy as claimed in claim 3, wherein the selecting of the qualified product from the group of module products is specifically: setting a preset detection environment, a qualified standard value and a preset measurement error according to the requirements of a client, and when a first detection result obtained by detection in the preset detection environment is within the preset measurement error range compared with the qualified standard value, indicating that the module product is a qualified product, otherwise, indicating that the module product is an unqualified product;
the customer selects a detection sample from the qualified products as follows: and (3) detecting the qualified product by the client in a preset detection environment, and when the obtained second detection result is within the preset measurement error range compared with the qualified standard value, indicating that the module product is the qualified product.
5. The method for monitoring the test accuracy according to claim 4, wherein a plurality of SFR detection machines are installed according to a predetermined detection environment, the plurality of SFR detection machines detect the detection sample and output a detection result, and the step of selecting a qualified SFR detection machine according to the detection result specifically comprises: and detecting the detection sample by adopting the plurality of SFR detection machines, wherein the SFR detection machines are qualified if the detection sample is qualified, and the SFR detection machines are unqualified if the detection sample is unqualified.
6. The method for monitoring the test accuracy as claimed in claim 5, wherein the step of selecting a qualified SFR detection machine according to the detection result specifically includes: and detecting the detection sample by using an SFR detection machine and obtaining a third detection result, wherein when the third detection result of the detection sample detected by the SFR detection machine is within the preset measurement error range compared with the qualified standard value, the SFR detection machine is qualified, and otherwise, the SFR detection machine is unqualified.
7. A precision monitoring apparatus, characterized in that the precision monitoring apparatus (100) comprises the following:
a selection unit (101) for selecting a test sample, which is a pre-selected qualified product;
the detection unit (102) is used for erecting a plurality of SFR detection machines according to a preset detection environment, and the plurality of SFR detection machines detect the detection sample and output a detection result, so that qualified SFR detection machines are judged and selected according to the detection result;
the point inspection unit (103) is used for recording the working time of the detection unit and sending out alarm information when the qualified SFR detection machine station working timing reaches the point inspection time;
and the execution unit (104) is used for selecting the machine table with the changed preset detection environment of the qualified SFR detection machine table, when the qualified SFR detection machine table detects the module product to be detected and reaches the point detection time, the qualified SFR detection machine table is used for detecting the detection sample, if the detection sample is qualified, the qualified SFR detection machine table still keeps qualified, and the preset detection environment of the qualified SFR detection machine table is not changed.
8. The apparatus for monitoring measurement accuracy as claimed in claim 7, wherein when the qualified SFR testing machine detects the module under test product for the point inspection time, the qualified SFR testing machine is used to test the testing sample, and if the testing sample is found to be a non-qualified product, it indicates that the qualified SFR testing machine is not qualified, and the predetermined testing environment of the qualified SFR testing machine has changed.
9. The apparatus for monitoring test accuracy as claimed in claim 7, wherein the selecting unit (101) is configured to select the test sample from the module products, provide a set of module products, select the qualified product from the module products, and select the test sample from the qualified product by the customer.
10. The apparatus for monitoring the testing accuracy as claimed in claim 7, wherein the apparatus for monitoring the testing accuracy further comprises a determining unit (105) for determining whether the plurality of SFR testing machines are qualified or unqualified, the plurality of SFR testing machines are used to test the testing sample, if the testing sample is qualified, the SFR testing machine is qualified, and if the testing sample is unqualified, the SFR testing machine is unqualified.
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| KR100759512B1 (en) * | 2005-11-25 | 2007-09-18 | 삼성전기주식회사 | Apparatus and method for focus regulation of camera module |
| AU2008261138B2 (en) * | 2008-12-19 | 2011-08-18 | Canon Kabushiki Kaisha | Measure display SFR using a camera and phase shifting |
| CN105163009B (en) * | 2015-08-04 | 2020-06-16 | 南昌欧菲光电技术有限公司 | Picture and method for testing camera module |
| CN107706121B (en) * | 2017-08-31 | 2020-05-26 | 华润赛美科微电子(深圳)有限公司 | Precision consistency correction method and system for batch test of multiple test devices |
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Address after: No.3, Taihong Road, Kunshan high tech Industrial Development Zone, Suzhou, Jiangsu Province, 215300 Patentee after: Kunshan Qiuti Microelectronics Technology Co.,Ltd. Address before: No.3, Taihong Road, Kunshan high tech Industrial Development Zone, Suzhou, Jiangsu Province, 215300 Patentee before: KUNSHAN Q TECHNOLOGY Co.,Ltd. |