CN113998451A - Test equipment - Google Patents

Test equipment Download PDF

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Publication number
CN113998451A
CN113998451A CN202111338137.4A CN202111338137A CN113998451A CN 113998451 A CN113998451 A CN 113998451A CN 202111338137 A CN202111338137 A CN 202111338137A CN 113998451 A CN113998451 A CN 113998451A
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CN
China
Prior art keywords
test
testing
tested
conveying mechanism
stations
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Pending
Application number
CN202111338137.4A
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Chinese (zh)
Inventor
黄邵春
李维维
韩万贵
宫尚伟
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Suzhou HYC Technology Co Ltd
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Suzhou HYC Technology Co Ltd
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Application filed by Suzhou HYC Technology Co Ltd filed Critical Suzhou HYC Technology Co Ltd
Priority to CN202111338137.4A priority Critical patent/CN113998451A/en
Publication of CN113998451A publication Critical patent/CN113998451A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G47/00—Article or material-handling devices associated with conveyors; Methods employing such devices
    • B65G47/74—Feeding, transfer, or discharging devices of particular kinds or types
    • B65G47/90—Devices for picking-up and depositing articles or materials
    • B65G47/905—Control arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G43/00—Control devices, e.g. for safety, warning or fault-correcting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G47/00—Article or material-handling devices associated with conveyors; Methods employing such devices
    • B65G47/74—Feeding, transfer, or discharging devices of particular kinds or types
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/1306—Details
    • G02F1/1309—Repairing; Testing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G2203/00—Indexing code relating to control or detection of the articles or the load carriers during conveying
    • B65G2203/02—Control or detection
    • B65G2203/0208—Control or detection relating to the transported articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G2203/00—Indexing code relating to control or detection of the articles or the load carriers during conveying
    • B65G2203/04—Detection means

Abstract

One embodiment of the present invention discloses a test apparatus, including: an inlet and an outlet; the conveying mechanism is arranged from the inlet to the outlet and comprises a feeding line and a discharging line, and a product to be tested entering from the inlet is arranged on the feeding line; the testing device comprises N testing units which are sequentially arranged along a conveying mechanism, wherein each testing unit comprises a plurality of testing stations provided with a testing machine; the manipulators which are respectively arranged corresponding to the N test units are arranged above the conveying mechanism; and the control unit is used for stopping the feeding line and controlling the corresponding manipulator to place the product to be tested on the nth testing station to be tested by the testing machine when the nth testing station sends a feeding request signal to the control unit, and after the test is finished, controlling the corresponding manipulator to place the qualified product to be tested on the blanking line to be output from an outlet, wherein N is more than or equal to 1 and less than or equal to N, and N is a natural number.

Description

Test equipment
Technical Field
The invention relates to the field of electronic product testing. And more particularly, to a test apparatus.
Background
At present, wearable equipment of intelligence is more popular electronic product, follows simple receiving and dispatching information, motion monitoring, voice conversation, develops to have the interconnection function, can be applied to a plurality of scenes, the small-size wrist-watch of being as good as with current smart mobile phone function. Each innovation in consumer-grade experience places higher demands on the current stage of the manufacturing process.
In the field of wearable equipment testing, most of production process tests can be realized through an image testing technology. Such as appearance defects of the screen, Mura test, bright spot test, etc. In the aspect of touch performance, a common method at present adopts a pressure test, and applies a certain pressure to a screen through a conductive PAD to obtain corresponding process parameters. In actual automatic production, a plurality of test stations are required to be arranged in the test process so as to meet the production requirement.
Disclosure of Invention
The invention aims to provide a test device. To solve at least one of the problems of the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the present invention provides a test apparatus comprising:
an inlet and an outlet;
the conveying mechanism is arranged from the inlet to the outlet and comprises a feeding line and a discharging line, and a product to be tested entering from the inlet is arranged on the feeding line;
the testing device comprises N testing units which are sequentially arranged along a conveying mechanism, wherein each testing unit comprises a plurality of testing stations provided with a testing machine;
the manipulators which are respectively arranged corresponding to the N test units are arranged above the conveying mechanism;
and the control unit is used for stopping the feeding line and controlling the corresponding manipulator to place the product to be tested on the nth testing station to be tested by the testing machine when the nth testing station sends a feeding request signal to the control unit, and after the test is finished, controlling the corresponding manipulator to place the qualified product to be tested on the blanking line to be output from an outlet, wherein N is more than or equal to 1 and less than or equal to N, and N is a natural number.
In one particular embodiment of the present invention,
the conveying mechanism comprises a first conveying mechanism and a second conveying mechanism which are arranged in parallel, wherein the first conveying mechanism comprises a first feeding line and a first discharging line, and the second conveying mechanism comprises a second feeding line and a second discharging line;
and a plurality of stations in the N testing units are respectively arranged on the sides, far away from each other, of the first conveying mechanism and the second conveying mechanism.
In one particular embodiment of the present invention,
the 1 st to Mth test units in the N test units comprise multilayer test stations in the direction perpendicular to the plane of the conveying mechanism, the M +1 st to Nth test units comprise single-layer test stations in the direction perpendicular to the plane of the conveying mechanism, and 1 < M < N;
the manipulator corresponding to each of the 1 st to Mth test units is two manipulators which are respectively arranged above the first conveying mechanism and the second conveying mechanism;
the manipulator corresponding to each of the (M + 1) th test unit to the Nth test unit is a manipulator and is arranged above the first conveying mechanism and between the second conveying mechanisms.
In one particular embodiment of the present invention,
the control unit judges whether a product to be tested exists in the corresponding test station or not according to whether the test station of the N test units sends a feeding request signal or not;
and if the p-th test unit and the q-th test unit have idle test stations, enabling the product to be tested to stay at the q-th test unit, placing the product to be tested on the idle test stations in the q test units by the corresponding manipulator, and testing by the tester, wherein p is more than or equal to 1 and q is more than or equal to N.
In one particular embodiment of the present invention,
the device also comprises a sensor arranged at the inlet and used for counting the quantity W of the products to be tested entering the device;
when the control unit detects that more than two idle test vacancies exist in each test unit of the N test units, W products to be tested are distributed to the N test units in the following mode:
and (3) calculating the proportion of the number of the test stations included in each test unit in the N test units: a is1:a2:…:ai…:aNWherein a isiThe number of test stations corresponding to the ith test unit is represented;
and (3) calculating the proportion of idle test stations in each test unit in the N test units: b1:b2:…:bi…:bNWherein b isiIndicating the number of idle test stations corresponding to the ith test unit;
calculating the product of the ratio of the number of the test stations and the ratio of the number of the idle test stations: a is1b1:a2b2:…:aibi…:aNbN；
Calculating the number Yi of products to be tested distributed to the ith test unit:
yi is the integer of Xi, where Xi ═ W × (a)ibi/(a1b1+a1b1+…+aibi+…aNbN))，
Wherein i is more than or equal to 1 and less than or equal to N.
In one embodiment, the rounding is rounding Xi.
In one particular embodiment of the present invention,
the control unit comprises a feeding counter and a discharging counter, wherein
The loading counter counts the idle loading waiting time of the test stations in each test unit, and if a plurality of idle test stations exist, the manipulator preferentially places the product to be tested at the tester with the longest idle loading waiting time;
the blanking timer times the idle blanking waiting time of the tested products of the testing stations in each testing unit, and preferentially enables the manipulator to place the product at the testing machine with the longest idle blanking waiting time on the blanking line.
In one particular embodiment of the present invention,
if the idle feeding waiting time of the test stations in the test unit is equal, the feeding counter is also configured to enable the manipulator to sequentially place the products to be tested from the test station which is far away from the inlet to the station which is far away from the inlet;
and if the idle blanking waiting time of the test stations in the test unit is equal, the blanking counter is also configured to enable the manipulator to sequentially take off the tested products from the test station which is farthest away from the inlet to the station which is farthest away.
In a specific embodiment, the product to be tested is a display module, and the equipment is display module pressure test equipment;
the testing machine comprises:
the image acquisition device is used for acquiring the placing posture of the display module placed on the testing machine; and the controller is used for enabling the testing machine to apply the pressure value to the display module according to the corresponding relation between the pre-stored placing posture deviation of the display module and the pressure value to be applied, wherein the posture deviation is the deviation between the actually placed posture and the standard posture.
In a specific embodiment, the testing machine further includes:
and the pressure sensor is used for detecting corresponding actual pressure values of the display module under different placing attitude deviations so as to obtain the corresponding relation.
In one particular embodiment of the present invention,
the corresponding relation is a linear fitting function obtained by using a least square method and taking the placing attitude deviation as an independent variable and the actual pressure value as a dependent variable.
In a specific embodiment, the testing machine further includes:
and the electric cylinder comprises a conductive pad and applies the pressure value to be applied to the display module.
In one embodiment, the conductive pads include a first conductive pad and a second conductive pad respectively disposed at two ends of the cylinder.
In one particular embodiment of the present invention,
and the controller receives the corresponding relation from an upper computer.
The invention has the following beneficial effects:
the testing equipment designed by the invention can reasonably distribute the testing stations to a certain extent, prevent the situations of material stacking and material blocking, simultaneously ensure the use times of each station as far as possible and prolong the service life of the testing machine.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 shows a schematic diagram of a test apparatus according to one embodiment of the invention.
Fig. 2 shows a schematic diagram of a first test unit or a second test unit of the test apparatus according to an embodiment of the present invention.
FIG. 3 is a schematic diagram of a third test cell structure of a test apparatus according to an embodiment of the present invention.
FIG. 4 shows a graphical illustration of the deviation versus pressure linearity according to one embodiment of the present invention.
Detailed Description
In order to make the technical solutions and advantages of the present invention clearer, the following will describe embodiments of the present invention in further detail with reference to the accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.
First embodiment
As shown in fig. 1, an embodiment of the present invention discloses a testing apparatus, which can be applied in testing the touch performance of a display module, for example, performing a pressure test on the display module. One skilled in the art will appreciate that the testing apparatus of the present invention may be used for testing a display module, and may also be used for testing other objects, which is not limited in the present invention.
Specifically, the test equipment includes:
an inlet and an outlet; the conveying mechanism is arranged from the inlet to the outlet and comprises a feeding line 3 and a discharging line 2, and the display module to be tested entering from the inlet is arranged on the feeding line; the testing device comprises N testing units which are sequentially arranged along a conveying mechanism, wherein each testing unit comprises a plurality of testing stations provided with a testing machine; the manipulator 10 is arranged above the conveying mechanism and corresponds to the N testing units respectively; and the control unit is used for stopping the feeding line and controlling the corresponding manipulator to place the display module to be tested on the nth testing station to be tested by the testing machine when the nth testing station sends a feeding request signal to the control unit, and after the test is finished, controlling the corresponding manipulator to place the display module to be tested on the blanking line to be output from an outlet, wherein N is more than or equal to 1 and less than or equal to N, and N is a natural number. In this example, N takes 3. In one specific example, the control unit includes an ohm dragon PLC (programmable logic controller), other servo driving devices, and the like.
In a specific embodiment, the testing machine includes: the image acquisition device is used for acquiring the placing posture of the display module placed on the testing machine; and the controller is used for enabling the testing machine to apply the pressure value to the display module according to the corresponding relation between the pre-stored placing posture deviation of the display module and the pressure value to be applied, wherein the posture deviation is the deviation between the actually placed posture and the standard posture. And the pressure sensor is used for detecting corresponding actual pressure values of the display module under different placing attitude deviations so as to obtain the corresponding relation, wherein the corresponding relation is a linear fitting function obtained by taking the placing attitude deviation as an independent variable and the actual pressure values as a dependent variable and adopting a least square method. And the electric cylinder comprises a conductive pad and applies the pressure value to be applied to the display module. The conductive pads comprise a first conductive pad and a second conductive pad which are respectively arranged at two ends of the electric cylinder. In a specific embodiment, the controller receives the correspondence from an upper computer. In one specific example, the host computer employs a Mohs brand industrial personal computer.
In a specific embodiment, the conveying mechanism comprises a first conveying mechanism and a second conveying mechanism which are arranged in parallel, wherein the first conveying mechanism comprises a first feeding line and a first discharging line, and the second conveying mechanism comprises a second feeding line and a second discharging line; the stations in the three test units are respectively arranged on the sides, far away from each other, of the first conveying mechanism and the second conveying mechanism, as shown in fig. 1. The first conveying mechanism and the second conveying mechanism further comprise return lines, and the interior of each unit of the belt line is divided into a return line 1, a discharging line 2 and a feeding line 3 in sequence from the middle.
In one embodiment, the 1 st to Mth test units of the N test units comprise a multi-layer test station in a direction perpendicular to a plane of the transport mechanism, the M +1 th to Nth test units comprise a single-layer test station in a direction perpendicular to the plane of the transport mechanism, wherein 1 < M < N; the manipulator corresponding to each of the 1 st to Mth test units is two manipulators which are respectively arranged above the first conveying mechanism and the second conveying mechanism; the manipulator corresponding to each of the (M + 1) th test unit to the Nth test unit is a manipulator and is arranged above the first conveying mechanism and between the second conveying mechanisms. In this example, M takes 2.
In a specific example, the testing apparatus of the present invention comprises three testing units, namely a first testing unit, a second testing unit and a third testing unit, wherein the first testing unit and the second testing unit respectively comprise sixteen testing stations, as shown in fig. 2, and the third unit is a standby unit, comprising eight testing stations, as shown in fig. 3. The first test unit and the second test unit in the three test units comprise a multi-layer test station in the direction perpendicular to the plane of the conveying mechanism, and the third test unit comprises a single-layer test station in the direction perpendicular to the plane of the conveying mechanism; the manipulator corresponding to each of the first test unit and the second test unit is two manipulators which are respectively arranged above the first conveying mechanism and the second conveying mechanism; and the manipulator corresponding to each test unit in the third test unit is a manipulator and is arranged above the first conveying mechanism and between the second conveying mechanisms.
In this example, the test procedure is: when the upstream equipment is used for blanking, the product flows into a feeding belt line of the equipment, if a test station in a certain unit has a feeding request, a blocking cylinder on the belt line descends to prevent the product from continuously flowing forwards, and the belt line is correspondingly stopped. And after the manipulator takes the materials away, the cylinder is blocked from rising, and the belt line continues to flow. The display module is grabbed from the feeding belt line by the manipulator and is sequentially placed on the spare testing stations on the two sides of the display module. Meanwhile, when the manipulator leaves a certain testing machine and sends out a safety signal, the testing machine starts to work. Firstly, the testing machine fixes the display module by tightening the air cylinder, the electric cylinder which is erected inside acts downwards, one end of the electric cylinder applies set pressure to the module, after the upper computer collects corresponding parameters, the electric cylinder is separated from the module and rotates 180 degrees, and the other end is used for testing the electric cylinder. After the tests at the two ends are completed, the test machine sends a blanking request, the manipulator grabs the module from the test station and places the blanking belt line, and then grabs the product from the feeding belt line, and a new round of test is started. The two sides of each test unit can simultaneously carry out respective material taking and placing and test processes without mutual interference. And the third test cell acts in the same flow as the first two cells.
In a specific embodiment, the control unit judges whether a display module to be tested exists in a corresponding test station according to whether the test station of the 3 test units sends a feeding request signal; and if the p-th test unit and the q-th test unit have idle test stations, enabling the display module to be tested to stay at the q-th test unit, placing the display module to be tested on the idle test stations in the q test units by the corresponding manipulator, and testing by the tester, wherein p is more than or equal to 1 and q is more than or equal to N.
Specifically, aiming at the conditions that in actual production, upstream equipment has more test stations, the blanking is rapid after the test is finished, and products are easy to accumulate on a feeding belt line of the equipment, the program design of the invention is that the products flow to a third test unit firstly according to the principle that the feeding of a next unit is preferential. When the station of third test unit is full, the product then can flow to second test unit, and in proper order, if the station of second test unit is full, the product then can stop at the material loading belt line of first test unit, waits for the manipulator to snatch.
The apparatus of the present invention comprises three test cells as described above, and the test cell comprises a plurality of test stations, and how to reasonably allocate the test stations in each test cell must be considered in the programming. Therefore, in a specific embodiment, the control unit includes a loading counter and a blanking counter, where after the display module to be tested enters the corresponding test unit, the loading counter counts the idle loading waiting time of the test station in each test unit, and if there are multiple idle test stations, the manipulator preferentially places the display module to be tested at the tester with the longest idle loading waiting time; the blanking timer times the idle blanking waiting time of the display module which is tested at the testing station in each testing unit, and preferentially enables the manipulator to place the display module at the testing machine with the longest idle blanking waiting time on a blanking line.
If the idle feeding waiting time of the testing stations in the testing unit is equal, the feeding counter is also configured to enable the manipulator to sequentially place the display modules to be tested from the testing station which is far away from the inlet to the station which is far away from the inlet; and if the idle blanking waiting time of the test stations in the test unit is equal, the blanking counter is also configured to enable the manipulator to sequentially take down the display module which is tested from the test station which is farthest away from the inlet to the station which is farthest away.
The testing equipment designed by the invention can reasonably distribute the testing stations to a certain extent, prevent the situations of material stacking and material blocking, simultaneously ensure the use times of each station as far as possible and prolong the service life of the testing machine.
Second embodiment
As shown in fig. 1, another embodiment of the present invention discloses a testing apparatus, which can be applied in testing the touch performance of a display module, such as performing a pressure test on the display module. One skilled in the art will appreciate that the testing apparatus of the present invention may be used for testing a display module, and may also be used for testing other objects, which is not limited in the present invention.
Specifically, the test equipment includes:
an inlet and an outlet; the conveying mechanism is arranged from the inlet to the outlet and comprises a feeding line 3 and a discharging line 2, and the display module to be tested entering from the inlet is arranged on the feeding line; the testing device comprises N testing units which are sequentially arranged along a conveying mechanism, wherein each testing unit comprises a plurality of testing stations provided with a testing machine; the manipulator 10 is arranged above the conveying mechanism and corresponds to the N testing units respectively; and the control unit is used for stopping the feeding line and controlling the corresponding manipulator to place the display module to be tested on the nth testing station to be tested by the testing machine when the nth testing station sends a feeding request signal to the control unit, and after the test is finished, controlling the corresponding manipulator to place the display module to be tested on the blanking line to be output from an outlet, wherein N is more than or equal to 1 and less than or equal to N, and N is a natural number. In this example, N takes 3.
In a specific embodiment, the testing machine includes: the image acquisition device is used for acquiring the placing posture of the display module placed on the testing machine; and the controller is used for enabling the testing machine to apply the pressure value to the display module according to the corresponding relation between the pre-stored placing posture deviation of the display module and the pressure value to be applied, wherein the posture deviation is the deviation between the actually placed posture and the standard posture. And the pressure sensor is used for detecting corresponding actual pressure values of the display module under different placing attitude deviations so as to obtain the corresponding relation, wherein the corresponding relation is a linear fitting function obtained by taking the placing attitude deviation as an independent variable and the actual pressure values as a dependent variable and adopting a least square method. And the electric cylinder comprises a conductive pad and applies the pressure value to be applied to the display module. The conductive pads comprise a first conductive pad and a second conductive pad which are respectively arranged at two ends of the electric cylinder. In a specific embodiment, the controller receives the correspondence from an upper computer.
In a specific embodiment, the conveying mechanism comprises a first conveying mechanism and a second conveying mechanism which are arranged in parallel, wherein the first conveying mechanism comprises a first feeding line and a first discharging line, and the second conveying mechanism comprises a second feeding line and a second discharging line; the stations in the three test units are respectively arranged on the sides, far away from each other, of the first conveying mechanism and the second conveying mechanism, as shown in fig. 1. The first conveying mechanism and the second conveying mechanism further comprise return lines, and the interior of each unit of the belt line is divided into a return line 1, a discharging line 2 and a feeding line 3 in sequence from the middle.
In one embodiment, the 1 st to Mth test units of the N test units comprise a multi-layer test station in a direction perpendicular to a plane of the transport mechanism, the M +1 th to Nth test units comprise a single-layer test station in a direction perpendicular to the plane of the transport mechanism, wherein 1 < M < N; the manipulator corresponding to each of the 1 st to Mth test units is two manipulators which are respectively arranged above the first conveying mechanism and the second conveying mechanism; the manipulator corresponding to each of the (M + 1) th test unit to the Nth test unit is a manipulator and is arranged above the first conveying mechanism and between the second conveying mechanisms. In this example, M takes 2.
In a specific example, the testing apparatus of the present invention comprises three testing units, namely a first testing unit, a second testing unit and a third testing unit, wherein the first testing unit and the second testing unit respectively comprise sixteen testing stations, as shown in fig. 2, and the third unit is a standby unit, comprising eight testing stations, as shown in fig. 3. The first test unit and the second test unit in the three test units comprise a multi-layer test station in the direction perpendicular to the plane of the conveying mechanism, and the third test unit comprises a single-layer test station in the direction perpendicular to the plane of the conveying mechanism; the manipulator corresponding to each of the first test unit and the second test unit is two manipulators which are respectively arranged above the first conveying mechanism and the second conveying mechanism; and the manipulator corresponding to each test unit in the third test unit is a manipulator and is arranged above the first conveying mechanism and between the second conveying mechanisms.
In this example, the test procedure is: when the upstream equipment is used for blanking, the product flows into a feeding belt line of the equipment, if a test station in a certain unit has a feeding request, a blocking cylinder on the belt line descends to prevent the product from continuously flowing forwards, and the belt line is correspondingly stopped. And after the manipulator takes the materials away, the cylinder is blocked from rising, and the belt line continues to flow. The display module is grabbed from the feeding belt line by the manipulator and is sequentially placed on the spare testing stations on the two sides of the display module. Meanwhile, when the manipulator leaves a certain testing machine and sends out a safety signal, the testing machine starts to work. Firstly, the testing machine fixes the display module by tightening the air cylinder, the electric cylinder which is erected inside acts downwards, one end of the electric cylinder applies set pressure to the module, after the upper computer collects corresponding parameters, the electric cylinder is separated from the module and rotates 180 degrees, and the other end is used for testing the electric cylinder. After the tests at the two ends are completed, the test machine sends a blanking request, the manipulator grabs the module from the test station and places the blanking belt line, and then grabs the product from the feeding belt line, and a new round of test is started. The two sides of each test unit can simultaneously carry out respective material taking and placing and test processes without mutual interference. And the third test cell acts in the same flow as the first two cells.
In a specific example, the equipment further comprises a sensor arranged at the entrance and used for counting the number W of the display modules to be tested entering the equipment;
when the control unit detects that more than two idle test vacancies exist in each test unit of the N test units, W display modules to be tested are distributed to the N test units in the following mode:
and (3) calculating the proportion of the number of the test stations included in each test unit in the N test units: a is1:a2:…:ai…:aNWherein a isiThe number of test stations corresponding to the ith test unit is represented;
and (3) calculating the proportion of idle test stations in each test unit in the N test units: b1:b2:…:bi…:bNWherein b isiIndicating the number of idle test stations corresponding to the ith test unit;
calculating the product of the ratio of the number of the test stations and the ratio of the number of the idle test stations: a is1b1:a2b2:…:aibi…:aNbN；
Calculating the number Yi of the display modules to be tested distributed by the ith test unit:
yi is the integer of Xi, where Xi ═ W × (a)ibi/(a1b1+a1b1+…+aibi+…aNbN))，
Wherein i is more than or equal to 1 and less than or equal to N. The rounding is to round Xi.
In one particular example, W is equal to 10. In this example, the first test unit of the present invention has a sensor at the front of the feeding belt line for counting the number of products entering the apparatus. If some test stations of the three units have finished testing and the product has been removed, one position is vacated, and when two or more positions are vacated, the proportional allocation principle method is satisfied. When the three test units meet the conditions, the sensor is triggered to count, the first test unit is used for loading the belt line to store ten products, the belt line starts to rotate, and the program distributes the products according to the number of the vacant stations of each test unit and the total test stations of each unit in proportion. The distribution rule is roughly as follows: the total test station proportion of each test unit is 2: 2: 1, counting the proportion of the rest stations in real time in the operation process of the equipment, correspondingly multiplying the proportion of the total test stations by the proportion of the rest stations, calculating the proportion number which needs to be distributed to each test unit, wherein the total number of products is 10, and calculating the number of products needed by each test station according to a rounding method. The details of the distribution are given in table 1.
TABLE 1
Figure BDA0003351227370000101
In a specific embodiment, the control unit comprises a feeding counter and a discharging counter, wherein after the display module to be tested enters the corresponding test unit, the feeding counter counts the idle feeding waiting time of the test stations in each test unit, and if a plurality of idle test stations exist, the manipulator preferentially places the display module to be tested at the test machine with the longest idle feeding waiting time; the blanking timer times the idle blanking waiting time of the display module which is tested at the testing station in each testing unit, and preferentially enables the manipulator to place the display module at the testing machine with the longest idle blanking waiting time on a blanking line.
If the idle feeding waiting time of the testing stations in the testing unit is equal, the feeding counter is also configured to enable the manipulator to sequentially place the display modules to be tested from the testing station which is far away from the inlet to the station which is far away from the inlet; and if the idle blanking waiting time of the test stations in the test unit is equal, the blanking counter is also configured to enable the manipulator to sequentially take down the display module which is tested from the test station which is farthest away from the inlet to the station which is farthest away.
Theoretically, the test time at each test station should be the same, but there are many factors affecting the test time such as signal interaction, mechanism action and human intervention during the production process, and the test time of each tester is different. The situation that some test completion waits for the blanking of the manipulator and some test completion are in the process of testing at the station of each test unit is caused, so that the method for distributing the test stations in proportion by each unit is utilized in the embodiment, the problem that the products are unevenly distributed and easily blocked due to the fact that the products flow to the two rear test units is solved, the use times of each test machine are almost the same as possible, and the service life of the test machine is prolonged.
The testing equipment designed by the invention can reasonably distribute the testing stations to a certain extent, prevent the situations of material stacking and material blocking, simultaneously ensure the use times of each station as far as possible and prolong the service life of the testing machine.
Under normal conditions, the display module is placed on a testing machine, the testing machine fixes the liquid crystal display module through the clamping air cylinder, the electric cylinder erected inside the liquid crystal display module moves downwards, one end of the electric cylinder applies set pressure to the module, after the upper computer collects corresponding parameters, the electric cylinder is separated from the module and rotates 180 degrees, and the other end of the electric cylinder is used for testing the module. In actual production, however, although the pressure setting value selected by the liquid crystal screen pressure test is obtained through a plurality of experiments, the value is only obtained under an ideal condition, and whether the liquid crystal screen meets the process requirements or not can be tested. However, in some cases, the position of the liquid crystal screen is not very suitable, and the covering surface of the conductive PAD cannot apply the same force to the liquid crystal screen, which may result in test failure.
In order to solve the problems, in the process of program verification, the liquid crystal screen is manually inclined in the cavity, various conditions similar to those in actual production and having deviation with an ideal position are created, and multiple groups of pressure values for successfully testing the abnormal position of the liquid crystal module are obtained. And summarizing functions according with the data change rules by adopting a data fitting method. The invention adopts a linear fitting function, namely the function y is a + bx, the module deviation value is set as an independent variable, the pressure value is set as a dependent variable, and the values of a and b with the minimum fitting error in all results are obtained by a least square method. The linear relationship between the deviation and the pressure is schematically shown in FIG. 4. In the later production process, an image of a liquid crystal module under test is acquired through a camera arranged at the front end of the manipulator, the image is compared with an ideal position picture set in advance, a transverse deviation value and a longitudinal deviation value are acquired under an XY coordinate system according to characteristic points, the position deviation of a screen is calculated, a substituting function y is a + bx, and a corresponding pressure value is obtained.
The pressure value is transmitted to the control unit through an upper computer program through OPC-UA communication, the pressure value is obtained between the testing machine and the control unit through a Modbus-TCP protocol, and the pressure value is converted into weight to be applied to an actual tested product through an electric cylinder in the testing machine.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations or modifications may be made on the basis of the above description, and all embodiments may not be exhaustive, and all obvious variations or modifications may be included within the scope of the present invention.

Claims (10)

1. A test apparatus, comprising:
an inlet and an outlet;
the conveying mechanism is arranged from the inlet to the outlet and comprises a feeding line and a discharging line, and a product to be tested entering from the inlet is arranged on the feeding line;
the testing device comprises N testing units which are sequentially arranged along a conveying mechanism, wherein each testing unit comprises a plurality of testing stations provided with a testing machine;
the manipulators which are respectively arranged corresponding to the N test units are arranged above the conveying mechanism;
and the control unit is used for stopping the feeding line and controlling the corresponding manipulator to place the product to be tested on the nth testing station to be tested by the testing machine when the nth testing station sends a feeding request signal to the control unit, and after the test is finished, controlling the corresponding manipulator to place the qualified product to be tested on the blanking line to be output from an outlet, wherein N is more than or equal to 1 and less than or equal to N, and N is a natural number.
2. The apparatus of claim 1,
the conveying mechanism comprises a first conveying mechanism and a second conveying mechanism which are arranged in parallel, wherein the first conveying mechanism comprises a first feeding line and a first discharging line, and the second conveying mechanism comprises a second feeding line and a second discharging line;
and a plurality of stations in the N testing units are respectively arranged on the sides, far away from each other, of the first conveying mechanism and the second conveying mechanism.
3. The apparatus of claim 2,
the 1 st to Mth test units in the N test units comprise multilayer test stations in the direction perpendicular to the plane of the conveying mechanism, the M +1 st to Nth test units comprise single-layer test stations in the direction perpendicular to the plane of the conveying mechanism, and 1 < M < N;
the manipulator corresponding to each of the 1 st to Mth test units is two manipulators which are respectively arranged above the first conveying mechanism and the second conveying mechanism;
the manipulator corresponding to each of the (M + 1) th test unit to the Nth test unit is a manipulator and is arranged above the first conveying mechanism and between the second conveying mechanisms.
4. The apparatus according to any one of claims 1-3,
the control unit judges whether a product to be tested exists in the corresponding test station or not according to whether the test station of the N test units sends a feeding request signal or not;
and if the p-th test unit and the q-th test unit have idle test stations, enabling the product to be tested to stay at the q-th test unit, placing the product to be tested on the idle test stations in the q test units by the corresponding manipulator, and testing by the tester, wherein p is more than or equal to 1 and q is more than or equal to N.
5. The apparatus according to any one of claims 1-3, characterized in that it further comprises a sensor arranged at said inlet for counting the number W of products to be tested that will enter the apparatus;
when the control unit detects that more than two idle test vacancies exist in each test unit of the N test units, W products to be tested are distributed to the N test units in the following mode:
and (3) calculating the proportion of the number of the test stations included in each test unit in the N test units: a is1:a2:…:ai…:aNWherein a isiThe number of test stations corresponding to the ith test unit is represented;
and (3) calculating the proportion of idle test stations in each test unit in the N test units: b1:b2:…:bi…:bNWherein b isiIndicating the number of idle test stations corresponding to the ith test unit;
calculating the product of the ratio of the number of the test stations and the ratio of the number of the idle test stations: a is1b1:a2b2:…:aibi…:aNbN；
Calculating the number Yi of products to be tested distributed to the ith test unit:
yi is the integer of Xi, where Xi ═ W × (a)ibi/(a1b1+a1b1+…+aibi+…aNbN))，
Wherein i is more than or equal to 1 and less than or equal to N.
6. The apparatus of claim 5, wherein the rounding is rounding Xi.
7. The apparatus according to claim 4 or 5,
the control unit comprises a feeding counter and a discharging counter, wherein
The loading counter counts the idle loading waiting time of the test stations in each test unit, and if a plurality of idle test stations exist, the manipulator preferentially places the product to be tested at the tester with the longest idle loading waiting time;
the blanking timer times the idle blanking waiting time of the tested products of the testing stations in each testing unit, and preferentially enables the manipulator to place the product at the testing machine with the longest idle blanking waiting time on the blanking line.
8. The apparatus of claim 7,
if the idle feeding waiting time of the test stations in the test unit is equal, the feeding counter is also configured to enable the manipulator to sequentially place the products to be tested from the test station which is far away from the inlet to the station which is far away from the inlet;
and if the idle blanking waiting time of the test stations in the test unit is equal, the blanking counter is also configured to enable the manipulator to sequentially take off the tested products from the test station which is farthest away from the inlet to the station which is farthest away.
9. The apparatus of claim 1,
the product to be tested is a display module, and the equipment is display module pressure test equipment;
the testing machine comprises:
the image acquisition device is used for acquiring the placing posture of the display module placed on the testing machine;
and the controller is used for enabling the testing machine to apply the pressure value to the display module according to the corresponding relation between the pre-stored placing posture deviation of the display module and the pressure value to be applied, wherein the posture deviation is the deviation between the actually placed posture and the standard posture.
10. The apparatus of claim 9, wherein the testing machine further comprises:
and the pressure sensor is used for detecting corresponding actual pressure values of the display module under different placing attitude deviations so as to obtain the corresponding relation.
CN202111338137.4A 2021-11-12 2021-11-12 Test equipment Pending CN113998451A (en)

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