CN113503820A - Product quality detection system - Google Patents
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- CN113503820A CN113503820A CN202110634244.5A CN202110634244A CN113503820A CN 113503820 A CN113503820 A CN 113503820A CN 202110634244 A CN202110634244 A CN 202110634244A CN 113503820 A CN113503820 A CN 113503820A
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- 238000001514 detection method Methods 0.000 title claims abstract description 17
- 238000005259 measurement Methods 0.000 claims abstract description 84
- 238000004458 analytical method Methods 0.000 claims abstract description 41
- 238000000034 method Methods 0.000 claims abstract description 32
- 230000005540 biological transmission Effects 0.000 claims abstract description 14
- 238000004886 process control Methods 0.000 claims abstract description 14
- 238000012545 processing Methods 0.000 claims abstract description 8
- 238000004364 calculation method Methods 0.000 claims abstract description 5
- 238000005516 engineering process Methods 0.000 claims description 12
- 230000003287 optical effect Effects 0.000 claims description 9
- 238000012360 testing method Methods 0.000 claims description 7
- 238000012790 confirmation Methods 0.000 claims description 3
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- 238000010586 diagram Methods 0.000 description 2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/026—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness by measuring distance between sensor and object
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/08—Measuring arrangements characterised by the use of optical techniques for measuring diameters
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Abstract
The invention provides a product quality detection system, comprising: the data acquisition module comprises at least one digital display measuring tool which is respectively connected with the acquisition device, and controls the data acquisition module to acquire and upload the measurement data of the product to be measured according to the radio signal output by the upper computer, wherein the measurement data is length or diameter; the host computer includes: the basic setting module is used for setting the measurement index requirement; the product project module is used for forming a measurement task, forming a measurement data acquisition request according to the measurement task and forming a radio signal output according to a distance condition; the data receiving module is used for receiving and recording the measurement data; the control chart analysis module is used for extracting the measurement data and forming a control chart; the analysis report module is used for judging the process control state of the product to be detected and forming an analysis report; and the calculation analysis module is used for processing to obtain the process capability index. The system has the advantages that the system analyzes the production state of the product in multiple dimensions by utilizing multiple data transmission modes, and further improves the product quality.
Description
Technical Field
The invention relates to the field of product quality detection, in particular to a product quality detection system.
Background
The product quality detection system finds and solves problems in the production process by detecting the product quality and the production process capability in real time, guides product improvement, improves product detection efficiency, controls the production process state, reduces production cost, improves product quality, and realizes a series of product quality tracking activities such as product data acquisition, data accumulation, data analysis, production feedback, quality tracing and the like.
The quality detection is usually carried out before the product is delivered from the factory after the production is finished, but the method has the defects of untimely improvement, unobvious quality improvement and the like, and in the production process, the detection data volume is large, the recording and the arrangement are inconvenient, and the efficiency is not high.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a product quality detection system, which comprises:
the data acquisition module comprises at least one digital display measuring tool with a wireless transmission technology, each digital display measuring tool is respectively connected with an acquisition device, the acquisition devices control the data acquisition module to acquire measurement data of a product to be measured according to a radio signal output by an upper computer and upload the measurement data of the product to be measured to the upper computer, and the measurement data of the product to be measured is the length or the diameter of the product to be measured;
the host computer includes:
the basic setting module is used for setting the measurement index requirements of the product to be measured;
the product project module is connected with the basic setting module, forms a measurement task according to the measurement index requirement, forms a measurement data acquisition request according to the measurement task, and forms and outputs a radio signal according to the distance condition in the measurement data acquisition request;
the data receiving module is connected with the data acquisition module and used for receiving and recording the measurement data of the product to be measured, which is uploaded by the data acquisition module;
the control chart analysis module is connected with the data receiving module and used for extracting the recorded measurement data of the product to be detected and forming a control chart, and the control chart is processed to obtain a central line and a control limit of the control chart, wherein the central line and the control limit are judgment references for judging the process control state of the product to be detected;
the analysis report module is connected with the control chart analysis module, judges the process control state of the product to be detected according to the central line and the control limit of the control chart and a preset process control state judgment rule, and forms an analysis report which judges that the product to be detected is in a process controlled state or a process out-of-control state;
and the calculation analysis module is connected with the control chart analysis module and is used for processing according to the central line and the control limit of the control chart and the measurement data of the product to be detected to obtain a process capability index.
Preferably, the upper computer further comprises an alarm module connected with the analysis report module, and the alarm module gives an alarm prompt when the analysis report shows that the product is in an out-of-control state in the process.
Preferably, at least one digital display measuring tool in the data acquisition module comprises a first digital display measuring tool based on a wireless long-distance transmission technology and a second digital display measuring tool based on a Bluetooth short-distance transmission technology;
and the upper computer identifies the digital display measuring tool matched with the distance condition according to the measurement data acquisition request, sends a radio signal to the collector corresponding to the matched digital display measuring tool and acquires the measurement data of the product to be measured.
Preferably, each digital display gauge includes:
the gear track is positioned at the side of the fixed ruler, and the bottom of the shell is provided with a movable ruler relative to the fixed ruler;
the two opposite fixed disks are respectively arranged on the side surfaces of the fixed ruler and the movable ruler and are used for fixing a product to be detected;
the distance measuring sensor is arranged at the top of one fixed disc, a bump is arranged at the top of the other fixed disc, the distance measuring sensor sends an optical signal to the bump, the optical signal is reflected back to the distance measuring sensor through the bump, and the distance measuring sensor measures the measuring data of the product to be measured according to the round trip time of the optical signal;
the rotating disc is arranged on the surface of the shell, the circle center position of one side of the rotating disc is fixedly connected with a gear through a connecting piece, the gear is matched with the gear track in size, and the rotating disc is rotated to drive the gear to move the shell;
the transmitting unit is arranged on the side surface of the shell and used for transmitting the measurement data of the product to be measured;
the collector is arranged on the side surface of the shell and used for outputting an electric signal according to the radio signal output by the upper computer;
the built-in processor is arranged in the shell, is respectively connected with the ranging sensor, and is arranged on a display, the transmitting unit and the collector on the shell, and is used for controlling the ranging sensor to measure the measurement data of the product to be measured according to the electric signal, sending the measurement data to the display for displaying, and outputting the measurement data through the transmitting unit after receiving an external confirmation sending instruction.
Preferably, the two opposite fixed disks respectively clamp two end parts along the length direction of the product to be measured, and the length of the product to be measured is measured through the distance measuring sensor; or
The two opposite fixed disks respectively clamp two end parts along the diameter direction of the product to be measured, and the diameter of the product to be measured is measured through the distance measuring sensor.
Preferably, the collector is connected with a transmitting end, the transmitting end is connected with the upper computer through a USB interface of the upper computer, the transmitting end forms and outputs a radio signal according to the distance condition in the measurement data acquisition request, and the collector receives the radio signal and converts the radio signal into an electric signal for output.
Preferably, the control chart center line and the control limit are obtained by processing the mean value and the standard deviation of the measured data of the product to be measured according to the 3 sigma method.
Preferably, the centerline and control limit are calculated according to the following formula:
CL＝μ
UCL＝μ+3σ
LCL＝μ-3σ
wherein,
CL is used to represent the centerline of the control map;
the UCL is used for representing an upper control limit of a control map;
the LCL is used for representing a lower control limit of the control map;
mu is used for representing the mean value of the measurement data of the product to be measured;
σ is used to represent the standard deviation of the measurement data for the product under test.
Preferably, the control chart comprises a mean-standard deviation control chart and a mean-range control chart, the analysis report module respectively analyzes and judges the mean-standard deviation control chart and the mean-range control chart according to a process control state judgment rule, and when the analysis report module judges that the product to be detected is in a process runaway state, the analysis report judges that the product is in the process runaway state.
Preferably, the process capability index is calculated according to the following formula:
cpk＝Min((X-LSL/3σ),(USL-X/3σ))
wherein,
cpkfor indicating a process capability index;
x is used for representing the average value of the measurement data of the product to be measured;
the LSL is used for representing a given upper limit deviation value of the product to be measured;
the USL is used for representing a given lower limit deviation value of a product to be detected;
σ is used to represent the standard deviation of the measurement data for the product under test.
The technical scheme has the following advantages or beneficial effects: the system analyzes the production state of the product in multiple dimensions by using multiple data transmission modes, and further improves the product quality.
Drawings
FIG. 1 is a schematic diagram of a system according to a preferred embodiment of the present invention;
FIG. 2 is an overall structure diagram of the digital display measuring tool according to the preferred embodiment of the present invention;
FIG. 3 is an enlarged view of a gear of the digital display measuring tool according to the preferred embodiment of the present invention;
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present invention is not limited to the embodiment, and other embodiments may be included in the scope of the present invention as long as the gist of the present invention is satisfied.
In accordance with the above-mentioned problems occurring in the prior art, there is provided a product quality detecting system, as shown in fig. 1, including:
the data acquisition module 1 comprises at least one digital display measuring tool 11 with a wireless transmission technology, each digital display measuring tool 11 is respectively connected with an acquisition device 111, the acquisition device 111 controls the data acquisition module 1 to acquire measurement data of a product to be measured according to a radio signal output by an upper computer 2 and uploads the measurement data of the product to be measured to the upper computer 2, and the measurement data of the product to be measured is the length or the diameter of the product to be measured;
the upper computer 2 includes:
a basic setting module 21 for setting the measurement index requirement of the product to be measured;
a product item module 22, which is connected with the basic setting module 21, forms a measurement task according to the measurement index requirement, forms a measurement data acquisition request according to the measurement task, and forms and outputs a radio signal according to the distance condition in the measurement data acquisition request;
the data receiving module 23 is connected with the data acquisition module 1 and is used for receiving and recording the measurement data of the product to be measured, which is uploaded by the data acquisition module 1;
the control chart analysis module 24 is connected with the data receiving module 23 and is used for extracting the recorded measurement data of the product to be detected and forming a control chart, and processing the control chart to obtain a central line and a control limit of the control chart, wherein the central line and the control limit are judgment references for judging the process control state of the product to be detected;
an analysis report module 25, connected to the control chart analysis module 24, for determining the process control state of the product to be tested according to the center line and control limit of the control chart and a preset process control state determination rule, and forming an analysis report, where the analysis report determines that the product to be tested is in a process controlled state or a process out-of-control state;
and a calculation analysis module 26 connected with the control chart analysis module 24 for processing the center line and the control limit of the control chart and the measurement data of the product to be measured to obtain a process capability index.
Specifically, in this embodiment, the basic setting module 21, the product item module 22, the data receiving module 23, the control chart analyzing module 24, the analysis reporting module 25, and the calculation analyzing module 26 of the upper computer 2 are implemented by an application program at a computer terminal, in the application program, the type and the measurement index of the product to be measured are set in the basic setting module 21, the type of the product to be measured may be a pencil, an eraser, a ruler, or the like, the measurement index may be a diameter or a length, in the product item module 22, the name and the number of the measurement task may be set, further, measurement items including the type, the distance condition, the capacity of the product to be measured, and the like are set, and in the data receiving module 23, the measurement data of the product to be measured is received and recorded in a table.
In the preferred embodiment of the present invention, the upper computer 2 further includes an alarm module 27 connected to the analysis report module 25, and when the analysis report indicates that the product is in an out-of-control state in the process, the alarm module 27 gives an alarm.
Specifically, in this embodiment, the alarm module 27 is implemented by an application program at a computer, when the analysis report indicates that the product is in a process runaway state, the analysis report module 5 outputs an alarm signal, and the alarm module 27 gives an alarm according to the alarm signal, where the alarm may be given by using a speaker at the computer to give an audio prompt.
In a preferred embodiment of the present invention, at least one digital display measuring tool 11 in the data acquisition module 1 includes a first digital display measuring tool based on a wireless long-distance transmission technology and a second digital display measuring tool based on a bluetooth short-distance transmission technology;
the upper computer 2 identifies the digital display measuring tool 11 matched with the distance condition according to the measurement data acquisition request, and sends a radio signal to the collector 111 corresponding to the matched digital display measuring tool 11 and acquires the measurement data of the product to be measured.
Specifically, in this embodiment, in consideration of the distance relationship between the measurement position of the product to be measured and the upper computer 2, the digital display measuring tool 11 employs two digital display measuring tools of different transmission technologies, when the distance condition of the measurement item in the product item module 22 is selected to be a short distance, the upper computer 2 sends a radio signal to the second digital display measuring tool based on the bluetooth short distance transmission technology, and when the distance condition of the measurement item in the product item module 22 is selected to be a long distance, the upper computer 2 sends a radio signal to the first digital display measuring tool based on the wireless long distance transmission technology.
In a preferred embodiment of the present invention, as shown in fig. 2 to 3, each digital display gauge 11 includes:
a shell 112, a main ruler 113 penetrates through the shell 112, a fixed ruler 114 is arranged at the bottom of one end of the main ruler 113, a gear track 115 is further arranged at the bottom of one end of the main ruler 113, the gear track 115 is located at the side of the fixed ruler 114, and a movable ruler 116 is arranged at the bottom of the shell 112 opposite to the fixed ruler 114;
two opposite fixed disks 117 respectively arranged on the side surfaces of the fixed ruler 114 and the movable ruler 116 for fixing a product to be detected;
a distance measuring sensor 118, which is arranged on the top of one fixing disc 117, the top of the other fixing disc 177 is provided with a bump 119, the distance measuring sensor 118 sends an optical signal to the bump 119, the optical signal is reflected back to the distance measuring sensor 118 through the bump 119, and the distance measuring sensor 118 measures the measurement data of the product to be measured according to the round trip time of the optical signal;
a rotating disc 120 arranged on the surface of the housing 112, wherein the center of a circle on one side of the rotating disc 120 is fixedly connected with a gear 122 through a connecting piece 121, the gear 122 is matched with the gear track 115 in size, and the rotating disc 120 is rotated to drive the gear 122 to move the housing 112;
a transmitting unit 123, disposed on the side of the housing 112, for transmitting the measurement data of the product to be measured;
the collector 111 is arranged on the side surface of the shell 112 and used for outputting an electric signal according to the radio signal output by the upper computer 2;
and the built-in processor 124 is arranged in the shell 112, is respectively connected with the ranging sensor 118, and a display 125, an emitting unit 123 and the collector 111 which are arranged on the shell, and is used for controlling the ranging sensor 118 to measure the measurement data of the product to be measured according to the electric signal, sending the measurement data to the display 125 for displaying, and outputting the measurement data through the emitting unit 123 after receiving an external confirmation sending instruction.
Specifically, in this embodiment, the transmitting unit of the first digital measuring instrument is a wireless long-distance transmitting unit, and the transmitting unit of the second digital measuring instrument is a bluetooth short-distance transmitting unit.
In the preferred embodiment of the present invention, two opposite fixing plates 117 respectively clamp two end portions along the length direction of the product to be measured, and the length of the product to be measured is measured by the distance measuring sensor 118; or
The two opposite fixing disks 117 respectively clamp both end portions in the diameter direction of the product to be measured, and the diameter of the product to be measured is measured by the distance measuring sensor 118.
In particular, in this embodiment, two opposing holding pans 117 are provided to ensure that pointed objects can be gripped, taking into account that the product to be tested may be pointed objects.
In a preferred embodiment of the present invention, the collector 111 is connected to a transmitting terminal 3, the transmitting terminal 3 is connected to the upper computer 2 through a USB interface of the upper computer 2, the transmitting terminal 3 forms and outputs a radio signal according to the distance condition in the measurement data acquisition request, and the collector 111 receives the radio signal and converts the radio signal into an electrical signal for output.
In a preferred embodiment of the invention, the control chart center line and control limits are obtained by processing the mean and standard deviation of the measured data of the product to be tested according to the 3 σ method.
In a preferred embodiment of the present invention, the centerline and control limit are calculated according to the following equations:
CL＝μ
UCL＝μ+3σ
LCL＝μ-3σ
wherein,
CL is used to represent the centerline of the control map;
the UCL is used for representing an upper control limit of a control map;
the LCL is used for representing a lower control limit of the control map;
mu is used for representing the mean value of the measurement data of the product to be measured;
σ is used to represent the standard deviation of the measurement data for the product under test.
In a preferred embodiment of the present invention, the control chart includes a mean-standard deviation control chart and a mean-range control chart, the analysis report module 25 respectively analyzes and judges the mean-standard deviation control chart and the mean-range control chart according to a process control state judgment rule, and when the analysis report module 25 judges that the product to be tested is in a process runaway state, the analysis report judges that the product is in the process runaway state.
Specifically, in this embodiment, the process control state determination rule includes:
rule one is as follows: if there are "some" data points on the control map that are outside the control limits, the process is out of control, and "some" data points refer to:
at least 1 data point of the 25 consecutive data points is outside the control limit (0.0654);
at least 2 of the 35 consecutive data points are outside the control limit (0.0041);
at least 3 of the 100 consecutive data points are outside the control limit (0.0026);
rule two: if 7 (0.0156) or more than 7 data points are positioned on the same side of the central line continuously, the data points are out of control, and a broken line formed by the points is called a homolateral chain;
rule three: if 7 (0.0004) or more than 7 continuous data points monotonically rise (or fall), the chain is out of control, and the chain formed by the points is called a monotonic chain;
rule four: if the control map has "more" data points located on the same side of the centerline, the control map is out of control, and the "more" data points refer to:
at least 10 of the 11 consecutive data points are on the same side of the centerline (0.0118);
at least 12 data points in the 14 consecutive data points are on the same side of the centerline (0.0130);
at least 14 of the 17 consecutive data points were on the same side of the centerline (0.0130;
at least 16 of the 20 consecutive data points are on the same side of the centerline (0.0118);
rule five: if the following high-order or low-order chain appears, the process is out of control:
at least 2 of the 3 consecutive data points are outside (or below) the centerline by 2 standard deviations (0.0073);
at least 3 of the 7 consecutive data points are outside (or below) the centerline by 2 standard deviations (0.0038);
wherein the data points represent measured data of the product to be tested.
In a preferred embodiment of the present invention, the process capability index is calculated according to the following formula:
cpk＝Min((X-LSL/3σ),(USL-X/3σ))
wherein,
cpkfor indicating a process capability index;
x is used for representing the average value of the measurement data of the product to be measured;
the LSL is used for representing a given upper limit deviation value of the product to be measured;
the USL is used for representing a given lower limit deviation value of a product to be detected;
σ is used to represent the standard deviation of the measurement data for the product under test.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (10)
1. A product quality detection system, comprising:
the data acquisition module comprises at least one digital display measuring tool with a wireless transmission technology, each digital display measuring tool is respectively connected with a collector, the collector controls the data acquisition module to acquire measurement data of a product to be measured according to a radio signal output by an upper computer and uploads the measurement data of the product to be measured to the upper computer, and the measurement data of the product to be measured is the length or the diameter of the product to be measured;
the host computer includes:
the basic setting module is used for setting the measurement index requirement of the product to be measured;
a product project module, which is connected with the basic setting module, forms a measurement task according to the measurement index requirement, forms a measurement data acquisition request according to the measurement task, and forms and outputs the radio signal according to the distance condition in the measurement data acquisition request;
the data receiving module is connected with the data acquisition module and is used for receiving and recording the measurement data of the product to be measured, which is uploaded by the data acquisition module;
the control chart analysis module is connected with the data receiving module and used for extracting recorded measurement data of the product to be detected and forming a control chart, and processing the control chart to obtain a center line and a control limit of the control chart, wherein the center line and the control limit are judgment references for judging the process control state of the product to be detected;
the analysis report module is connected with the control chart analysis module, judges the process control state of the product to be detected according to the central line and the control limit of the control chart and a preset process control state judgment rule, and forms an analysis report which judges that the product to be detected is in a process controlled state or a process out-of-control state;
and the calculation analysis module is connected with the control chart analysis module and is used for processing according to the central line and the control limit of the control chart and the measurement data of the product to be detected to obtain a process capability index.
2. The product quality detection system of claim 1, wherein the host computer further comprises an alarm module connected to the analysis report module, and the alarm module gives an alarm prompt when the analysis report indicates that the product is in the process out-of-control state.
3. The product quality detection system of claim 1, wherein at least one of the digital display gauges in the data acquisition module comprises a first digital display gauge based on a wireless long-distance transmission technology and a second digital display gauge based on a Bluetooth short-distance transmission technology;
and the upper computer identifies the digital display measuring tool matched with the distance condition according to the measurement data acquisition request, sends the radio signal to the collector corresponding to the matched digital display measuring tool and acquires the measurement data of the product to be measured.
4. The product quality detection system of claim 1, wherein each of the digital gauges respectively comprises:
the gear track is positioned beside the fixed ruler, and the bottom of the shell is provided with a movable ruler relative to the fixed ruler;
the two opposite fixed disks are respectively arranged on the side surfaces of the fixed ruler and the movable ruler and are used for fixing the product to be detected;
the distance measuring sensor is arranged at the top of one fixed disc, a convex block is arranged at the top of the other fixed disc, the distance measuring sensor sends an optical signal to the convex block, the optical signal is reflected back to the distance measuring sensor through the convex block, and the distance measuring sensor measures the measuring data of the product to be measured according to the round trip time of the optical signal;
the rotating disc is arranged on the surface of the shell, the circle center position of one side of the rotating disc is fixedly connected with a gear through a connecting piece, the gear is matched with the gear track in size, and the rotating disc is rotated to drive the gear to move the shell;
the transmitting unit is arranged on the side surface of the shell and used for transmitting the measurement data of the product to be measured;
the collector is arranged on the side surface of the shell and used for outputting an electric signal according to the radio signal output by the upper computer;
the built-in processor is arranged in the shell and is respectively connected with the distance measuring sensor, the display arranged on the shell, the transmitting unit and the collector and used for controlling the distance measuring sensor to measure the measuring data of the product to be measured and simultaneously sending the measuring data to the display to be displayed and outputting the measuring data through the transmitting unit after receiving an external confirmation sending instruction.
5. The product quality detection system of claim 4, wherein the two opposing fixed trays respectively clamp two end portions along a length direction of the product to be detected, and the length of the product to be detected is measured by the distance measuring sensor; or
The two opposite fixed disks respectively clamp two end parts along the diameter direction of the product to be measured, and the diameter of the product to be measured is measured through the distance measuring sensor.
6. The product quality detection system of claim 4, wherein the collector is connected to a transmitting terminal, the transmitting terminal is connected to the upper computer through a USB interface of the upper computer, the transmitting terminal forms and outputs the radio signal according to the distance condition in the measurement data acquisition request, and the collector receives and converts the radio signal into the electrical signal for output.
7. The product quality inspection system of claim 1, wherein the centerline and the control limit of the control chart are processed according to a 3 σ method for a mean and a standard deviation of the measurement data of the product under test.
8. The product quality inspection system of claim 7, wherein the centerline and the control limit are calculated according to the following equations:
CL＝μ
UCL＝μ+3σ
LCL＝μ-3σ
wherein,
CL is used to represent the centerline of the control map;
UCL is used for representing the upper control limit of the control chart;
the LCL is used for representing a lower control limit of the control chart;
mu is used for representing the mean value of the measurement data of the product to be measured;
σ is used to represent the standard deviation of the measurement data of the product under test.
9. The product quality detection system of claim 1, wherein the control chart includes a mean-standard deviation control chart and a mean-range control chart, the analysis report module respectively analyzes and judges the mean-standard deviation control chart and the mean-range control chart according to the process control state judgment rule, and when the analysis report module judges that the product to be detected is in the process out-of-control state, the analysis report judges that the product is in the process out-of-control state.
10. The product quality inspection system of claim 1, wherein the process capability index is calculated according to the following formula:
cpk＝Min((X-LSL/3σ),(USL-X/3σ))
wherein,
cpkfor representing the process capability index;
x is used for representing the average value of the measurement data of the product to be measured;
the LSL is used for representing a given upper limit deviation value of the product to be detected;
the USL is used for representing a given lower limit deviation value of the product to be detected;
σ is used to represent the standard deviation of the measurement data of the product under test.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110634244.5A CN113503820A (en) | 2021-06-07 | 2021-06-07 | Product quality detection system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110634244.5A CN113503820A (en) | 2021-06-07 | 2021-06-07 | Product quality detection system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114087940A (en) * | 2021-11-18 | 2022-02-25 | 得力集团有限公司 | Use method of multifunctional vernier caliper |
| CN114384872A (en) * | 2021-12-02 | 2022-04-22 | 北京能科瑞元数字技术有限公司 | Product development process quality comprehensive management and control system |
-
2021
- 2021-06-07 CN CN202110634244.5A patent/CN113503820A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114087940A (en) * | 2021-11-18 | 2022-02-25 | 得力集团有限公司 | Use method of multifunctional vernier caliper |
| CN114087940B (en) * | 2021-11-18 | 2024-05-31 | 得力集团有限公司 | Use method of multifunctional vernier caliper |
| CN114384872A (en) * | 2021-12-02 | 2022-04-22 | 北京能科瑞元数字技术有限公司 | Product development process quality comprehensive management and control system |
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Application publication date: 20211015 |
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