CN103149527B - Printed circuit board (PCB) detecting device and corresponding method - Google Patents

Printed circuit board (PCB) detecting device and corresponding method Download PDF

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Publication number
CN103149527B
CN103149527B CN201210561117.8A CN201210561117A CN103149527B CN 103149527 B CN103149527 B CN 103149527B CN 201210561117 A CN201210561117 A CN 201210561117A CN 103149527 B CN103149527 B CN 103149527B
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China
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voltage
unit
pcb board
main control
control module
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CN201210561117.8A
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Chinese (zh)
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CN103149527A (en
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邓智强
揭光幸
吕小刚
安正庆
谢昆哲
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精成科技电子(东莞)有限公司
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Publication of CN103149527A publication Critical patent/CN103149527A/en
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Abstract

The invention provides a printed circuit board (PCB) detecting device and a corresponding method of the PCB detecting device. The device comprises a main control module, a voltage detecting module and a board bending detecting module, wherein the main control module is used for controlling the board bending detecting module and the voltage detecting module to respectively detect the board bending and voltage of a to-be-detected PCB according to user command, whether the to-be-detected PCB is qualified or not is detected by the main control module according to fed back detecting data of the board bending detecting module and the voltage detecting module. The board bending detecting module and the voltage detecting module are respectively used for detecting the board bending and the voltage of the to-be-detected PCB according to the control command of the main control module and feeding back detecting data to the main control module after detecting. The PCB detecting device and the corresponding method of the PCB detecting device are designed for rapid and accurate detecting of the voltage and the board bending of products in the production process of printed circuit board assemblies (PCBA), and have the advantages of being simple in operation, short in detecting time, convenient to install, capable of uploading detecting data to a personal computer (PC) to be saved, and beneficial for data analysis.

Description

A kind of pcb board pick-up unit and corresponding method

Technical field

The present invention relates to detection field, relate in particular to a kind of pcb board pick-up unit and corresponding method.

Background technology

The voltage characteristic of printed circuit board (PCB, Printed Circuit Board) and the curved characteristic of plate are one of important indicators of weighing a PC quality.It at PCBA(PCBA, is the abbreviation of English Printed Circuit Board Assembly, namely PCB hollow plate is through the upper part of SMT, then passes through the whole processing procedure of DIP plug-in unit, is called for short PCBA) in production run, need testing product voltage and plate curved, guarantee product quality.

In the prior art, the subsystem that curved correlation technique mainly concentrates on each special-purpose field with surveying voltage and drafting board is realized.For example, the patent of invention 2009102221559 of authorizing for 2009, has described a kind of circuit board voltage measuring equipment, and it has control module, voltage ratio records module and display unit compared with module, mistiming.And utility model patent 2010202083561 has been recorded by the mode of pressure detection and has been measured the curved technical scheme of pcb board plate.

But prior art exists obvious defect, the curved measuring equipment of first existing plate cannot detect voltage simultaneously, and can not Collection and conservation test record.Secondly curved proving installation complex structure of plate, the disclosed device in 2010202083561 of take is example, it mainly completes the test in PCB production run, rather than designs for PCBA Production requirement.The 3rd, existing technology, by voltage and the curved independent measurement of plate, fails to integrate two tests, is difficult to meet the demand of the quick on-line testing in PCBA production run.

Summary of the invention

The present invention, for solving the problems of the technologies described above, provides a kind of pcb board pick-up unit and corresponding method.This pcb board pick-up unit and corresponding method, in PCBA production run, the voltage of product and curved quick and precisely detection of plate being designed, mainly solve online production test problem, improve the quality of products.Pcb board pick-up unit provided by the invention is a kind of device with voltage and the curved measurement of plate, and it is simple to operate, the test duration is short, easy for installation, and test data can be uploaded to PC and preserve, and facilitates data analysis.

Pcb board pick-up unit provided by the invention comprises: main control module, voltage detection module, the curved detection module of plate;

Described main control module is used for according to user instruction, the curved detection module of control panel and voltage detection module respectively and voltage curved to the plate of pcb board to be measured detect, and it is qualified according to the detection data of the curved detection module of described plate and voltage detection module feedback, to judge whether described pcb board to be measured detects;

The curved detection module of described plate, for according to the steering order of described main control module, detects the plate of pcb board to be measured is curved, and to described main control module feedback, detects data after detection completes;

Described voltage detection module, for according to the steering order of described main control module, detects the voltage of pcb board to be measured, and to described main control module feedback, detects data after detection completes.

Wherein, described pcb board pick-up unit also comprises data client, and it is for sending described user instruction to described main control module, and receives, stores detection data and the testing result of described main control module feedback.

Wherein, described voltage detection module comprises: voltage signal sampling holding unit, reference voltage generation unit, AD Date Conversion Unit, high-speed serial data communication unit; Wherein, by described high-speed serial data communication unit, mode and the main control module with SPI agreement connects voltage detection module, described high-speed serial data communication unit isolation digital signal.

In described pcb board pick-up unit, it is characterized in that, the curved detection module of described plate comprises: Fibre Optical Sensor and fixed jig;

Check-out console is curved from different directions respectively for described Fibre Optical Sensor, with IO interface mode, testing result is fed back to described main control module;

Described fixed jig is used for installing described Fibre Optical Sensor, and carries described pcb board to be measured.

Wherein, the curved detection module of described plate at least comprises: three Fibre Optical Sensors that are parallel to described fixed jig place plane layout, and wherein have at least two Fibre Optical Sensors mutually vertical.

Wherein, described Fibre Optical Sensor comprises: transmitting terminal and receiving end; Described transmitting terminal and receiving end are arranged on respectively the fixed position on fixed jig, and transmitting terminal and receiving end are adjusted on same straight line.

Wherein, described main control module comprises: MCU unit, NVRAM unit, RTC unit, keyboard, I/O unit, SPI interface, RS232 unit;

Described MCU unit is the control core of described pcb board pick-up unit; NVRAM unit is used for preserving setting parameter; RTC unit provides system clock; Keyboard is used for setting input; I/O unit for detection of, control; SPI interface is used for and voltage detection module swap data; RS232 is for being connected with data client.

Accordingly, the present invention also provides a kind of pcb board detection method, comprising:

The SN code of pcb board to be measured is scanned into data client, by data client, sends user instruction notice main control module and start test;

The curved detection module of main control module control panel starts the curved detection of plate, and receives the detection data of the curved detection module feedback of described plate, distinguishes defective products;

To by the pcb board to be measured of the curved detection of described plate, main control module is controlled voltage detection module trigger voltage and is detected, and receives the detection data of described voltage detection module feedback, distinguishes defective products;

By all detection data packing uploading data client storage, for follow-up data analysis.

Wherein, the curved detection module of described main control module control panel starts the curved detection of plate, and receives the detection data of the curved detection module feedback of described plate, distinguishes defective products, comprising:

Described pcb board to be measured is put into fixed jig, on described fixed jig, Fibre Optical Sensor is installed;

If described pcb board to be measured has crooked phenomenon, crooked part will hinder the conduction of light beam, thereby trigger Fibre Optical Sensor output alarm signal, thereby whether described main control module there is output alarm signal to judge whether described pcb board to be measured is defective products by detecting described Fibre Optical Sensor.

Wherein, described main control module is controlled voltage detection module trigger voltage and is detected, and receives the detection data of described voltage detection module feedback, distinguishes defective products, comprising:

Voltage detection module detects the voltage signal of voltage check point on described pcb board to be measured and samples, described voltage signal first enters AD Date Conversion Unit after resistance pressure-dividing network, voltage follow, holding circuit, meanwhile reference voltage is also input to AD Date Conversion Unit, in AD Date Conversion Unit, complete by simulating signal the conversion to digital signal, finally by data communication units, magnitude of voltage is sent to main control module.

Pcb board pick-up unit provided by the invention and corresponding method, in PCBA production run, the voltage of product and curved quick and precisely detection of plate being designed, mainly solve online production test problem, improve the quality of products.Pcb board pick-up unit provided by the invention is a kind of device with voltage and the curved measurement of plate, and it is simple to operate, the test duration is short, easy for installation, and test data can be uploaded to PC and preserve, and facilitates data analysis.

Further, the present invention be directed to the application in enterprise's production environment, the pick-up unit of a kind of voltage and the curved measurement of plate is provided, is a kind of automated detection system that merges numerous technology such as machinery, electronics, sensor, computer software.

The present invention mainly comprises main control module, voltage detection module, the curved detection module of plate, data client and five parts of test fixed jig.Wherein voltage detection module is comprised of voltage sample unit, reference voltage generation unit, AD converting unit and high-speed serial data communication unit; The curved detection module of plate is comprised of three groups of Fibre Optical Sensors, forms the curved detection of plate of three different directions.

Main control module is coordinated the work of each submodule, and first, the curved detection module of control panel, drives the plate of three different directions of three groups of Fibre Optical Sensors detections curved; Secondly, trigger voltage detection module, through sampling unit, AD converting unit, is converted to the voltage signal of simulation digital voltage value, and this magnitude of voltage and standard value is compared, to distinguish non-defective unit and defective products; Finally, all test datas are uploaded to PC end, by PC, preserve test record, facilitate data analysis.All test processs are all controlled automatically and are completed by main control module, without manual operation.

Accompanying drawing explanation

In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.

Fig. 1 is pcb board pick-up unit the first example structure schematic diagram provided by the invention;

Fig. 2 is pcb board pick-up unit the second example structure schematic diagram provided by the invention;

Fig. 3 is PCB voltage detection module structural representation provided by the invention;

Fig. 4 is the fundamental diagram of voltage detection module provided by the invention;

Fig. 5 is the curved detection module structural representation of plate provided by the invention;

Fig. 6 is main control module structural representation provided by the invention;

Fig. 7 is pcb board detection method the first embodiment schematic flow sheet provided by the invention;

Fig. 8 is pcb board detection method the second embodiment schematic flow sheet provided by the invention;

Fig. 9 is data client log-in interface schematic diagram provided by the invention.

Embodiment

Pcb board pick-up unit provided by the invention and corresponding method, in PCBA production run, the voltage of product and curved quick and precisely detection of plate being designed, mainly solve online production test problem, improve the quality of products.Pcb board pick-up unit provided by the invention is a kind of device with voltage and the curved measurement of plate, and it is simple to operate, the test duration is short, easy for installation, and test data can be uploaded to PC and preserve, and facilitates data analysis.

Referring to Fig. 1, it is pcb board pick-up unit the first example structure schematic diagram provided by the invention.As shown in Figure 1, this pcb board pick-up unit comprises: main control module 1, voltage detection module 2, the curved detection module 3 of plate;

Described main control module 1 is for according to user instruction, the curved detection module 3 of control panel and voltage detection module 2 respectively and voltage curved to the plate of pcb board to be measured detect, and it is qualified according to the detection data of the curved detection module of described plate and voltage detection module feedback, to judge whether described pcb board to be measured detects;

The curved detection module 3 of described plate, for according to the steering order of described main control module 1, detects the plate of pcb board to be measured is curved, and to described main control module 1 feedback, detects data after detection completes;

Described voltage detection module 2, for according to the steering order of described main control module 1, detects the voltage of pcb board to be measured, and to described main control module 1 feedback, detects data after detection completes.

Referring to Fig. 2, it is pcb board pick-up unit the second example structure schematic diagram provided by the invention.In the present embodiment, by the structure of more detailed description pcb board pick-up unit.

Described main control module 1 is for according to user instruction, the curved detection module 3 of control panel and voltage detection module 2 respectively and voltage curved to the plate of pcb board to be measured detect, and it is qualified according to the detection data of the curved detection module of described plate and voltage detection module feedback, to judge whether described pcb board to be measured detects;

The curved detection module 3 of described plate, for according to the steering order of described main control module 1, detects the plate of pcb board to be measured is curved, and to described main control module 1 feedback, detects data after detection completes;

Described voltage detection module 2, for according to the steering order of described main control module 1, detects the voltage of pcb board to be measured, and to described main control module 1 feedback, detects data after detection completes.

Further, described pcb board pick-up unit also comprises data client 4.Data client 4 is for sending described user instruction to described main control module 1, and receives, stores detection data and the testing result of described main control module 1 feedback, for later data analysis is offered help.

More specifically, as shown in Figure 3, described voltage detection module 2 comprises: voltage signal sampling holding unit 21, reference voltage generation unit 22, AD Date Conversion Unit 23, high-speed serial data communication unit 24; Wherein, by described high-speed serial data communication unit 24, mode and the main control module 1 with SPI agreement connects voltage detection module 2, described high-speed serial data communication unit 24 isolation digital signals, to improve the anti-interference of voltage detection module, improve the accuracy of measuring.

The principle of work of this voltage detection module 2 is as shown in Figure 4: voltage signal first passes through resistance pressure-dividing network, after voltage follow, holding circuit, enter AD Date Conversion Unit, meanwhile reference voltage is also input to AD Date Conversion Unit, in AD Date Conversion Unit, complete by simulating signal the conversion to digital signal, finally by data communication units, magnitude of voltage is sent to main control module.

Referring to Fig. 5, be the curved detection module structural representation of plate provided by the invention, as shown in Figure 5, the curved detection module of this plate comprises: Fibre Optical Sensor 31 and fixed jig 32;

Check-out console is curved from different directions respectively for described Fibre Optical Sensor 31, with IO interface mode, testing result is fed back to described main control module; Described fixed jig 32 is for described Fibre Optical Sensor is installed, and carries described pcb board to be measured.Preferably, in embodiments of the present invention, the curved detection module of described plate at least comprises: three Fibre Optical Sensors 31 that are parallel to described fixed jig 32 place plane layouts, and wherein have at least two Fibre Optical Sensors 31 mutually vertical.More specifically, described Fibre Optical Sensor 31 comprises: transmitting terminal 311 and receiving end 312; Described transmitting terminal 311 and receiving end 312 are arranged on respectively the fixed position on fixed jig, and transmitting terminal 311 and receiving end 312 are adjusted on same straight line.

It will be appreciated by persons skilled in the art that the curved detection module structure of above-mentioned plate puts without any blocking on pcb board to be measured, therefore can adopt mechanical arm or manual type between production line and the curved detection module of plate, to pick and place easily, raise the efficiency.

Further, described main control module comprises: MCU unit, NVRAM unit, RTC unit, keyboard, I/O unit, SPI interface, RS232 unit (as shown in Figure 6); Described MCU unit is the control core of described pcb board pick-up unit; NVRAM unit is used for preserving setting parameter; RTC(Real-time clock) unit provides system clock; Keyboard is used for setting input; I/O unit for detection of, control; SPI interface is used for and voltage detection module swap data; RS232 is for being connected with data client.

Referring to Fig. 7, it is pcb board detection method the first embodiment schematic flow sheet provided by the invention.This pcb board detection method can be realized by pcb board pick-up unit provided by the invention.This pcb board detection method comprises:

Step S101, is scanned into data client by the SN code of pcb board to be measured, sends user instruction notice main control module start test by data client.

Step S102, the curved detection module of main control module control panel starts the curved detection of plate, and receives the detection data of the curved detection module feedback of described plate, distinguishes defective products.

Step S103, to by the pcb board to be measured of the curved detection of described plate, main control module is controlled voltage detection module trigger voltage and is detected, and receives the detection data of described voltage detection module feedback, distinguishes defective products.

Step S104, by all detection data packing uploading data client storage, for follow-up data analysis.

Referring to Fig. 8, it is pcb board detection method the second embodiment schematic flow sheet provided by the invention.This pcb board detection method can be realized by pcb board pick-up unit provided by the invention.This pcb board detection method comprises:

Step S201, completes the initializing set of modules automatically after pcb board pick-up unit powers on, establish a communications link with data client, enters test wait state.

Step S202, is scanned into data client by the SN code of pcb board to be measured, sends user instruction notice main control module start test by data client.

Step S203, the curved detection module of main control module control panel starts the curved detection of plate, and receives the curved detection data of plate of the curved detection module feedback of described plate.Be specially, described pcb board to be measured is put into fixed jig, on described fixed jig, Fibre Optical Sensor is installed; If described pcb board to be measured has crooked phenomenon, crooked part will hinder the conduction of light beam, thereby trigger Fibre Optical Sensor output alarm signal, thereby whether described main control module there is output alarm signal to judge whether described pcb board to be measured is defective products by detecting described Fibre Optical Sensor.

Step S204, main control module is according to the curved detection data of plate of the curved detection module feedback of described plate, and whether the detected pcb board of judgement is defective products, if be judged as defective products, performs step S208, otherwise execution step S205.

Step S205, to by the pcb board to be measured of the curved detection of described plate, main control module is controlled voltage detection module trigger voltage and is detected, and receives the voltage detecting data of described voltage detection module feedback.Be specially, voltage detection module detects the voltage signal of voltage check point on described pcb board to be measured and samples, described voltage signal first enters AD Date Conversion Unit after resistance pressure-dividing network, voltage follow, holding circuit, meanwhile reference voltage is also input to AD Date Conversion Unit, in AD Date Conversion Unit, complete by simulating signal the conversion to digital signal, finally by data communication units, magnitude of voltage is sent to main control module.

Step S206, main control module is according to the voltage detecting data of described voltage detection module feedback, and whether the detected pcb board of judgement is defective products, if be judged as defective products, performs step S208, otherwise execution step S207.

Step S207, judges that described detected PCB is by voltage and the curved detection of plate.

Step S208, integrates packing by all test datas, and uploading data client storage, facilitates follow-up data analysis.More specifically, data client log-in interface as shown in Figure 9.Data client, by selecting the mode of work order, is called the testing standard of different product, and testing standard is in advance by engineering staff's input system, to prevent artificial modification testing standard, improves product quality.During test, operator only need to be scanned into product SN PC software, and PC can issue test sign on, and main control module starts test, and test structure is returned.Software can be preserved all test datas in the mode of database, for later data analysis is offered help.

It should be noted that, during in the present invention, each is implemented, described data client can be computer PC or other intelligent terminals.

Pcb board pick-up unit provided by the invention and corresponding method, combine voltage measurement and the curved measurement of plate, has detectability quickly and accurately, checking by experiment, and whole testing process needs only 3-6 second; And simple to operate, only need simple three actions just can complete whole test, realize autorun; Meanwhile, apparatus and method provided by the invention possess voltage ratio compared with arbitration functions, for distinguishing non-defective unit and defective products; And test data can be uploaded PC.Use this pick-up unit to substitute original multimeter measuring method, can greatly improve testing efficiency, and can effectively solve the phenomenon that pen meter of universal meter scratches pcb board, integrated the curved measurement of plate, can save manpower.Install distinctive voltage ratio compared with arbitration functions, energy automatic distinguishing non-defective unit and defective products, solve people effectively for misjudgment, significant to improving the quality of products.

One of ordinary skill in the art will appreciate that all or part of flow process realizing in above-described embodiment method, to come the hardware that instruction is relevant to complete by computer program, described program can be stored in a computer read/write memory medium, this program, when carrying out, can comprise as the flow process of the embodiment of above-mentioned each side method.Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-Only Memory, ROM) or random store-memory body (Random Access Memory, RAM) etc.

Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.

Claims (5)

1. a pcb board pick-up unit, is characterized in that, this pick-up unit comprises: the curved detection module of main control module, voltage detection module and plate;
Described main control module is used for according to user instruction, the curved detection module of control panel and voltage detection module respectively and voltage curved to the plate of pcb board to be measured detect, and it is qualified according to the detection data of the curved detection module of described plate and voltage detection module feedback, to judge whether described pcb board to be measured detects;
The curved detection module of described plate is used for according to the steering order of described main control module, to the plate of pcb board to be measured is curved, detect, and after completing, detection detects data to described main control module feedback, wherein, the curved detection module of described plate comprises: Fibre Optical Sensor and fixed jig, and the curved detection module of this plate at least comprises: three Fibre Optical Sensors that are parallel to described fixed jig place plane layout, and wherein have at least two Fibre Optical Sensors mutually vertical; Check-out console is curved from different directions respectively for described Fibre Optical Sensor, with IO interface mode, testing result is fed back to described main control module; Described fixed jig is used for installing described Fibre Optical Sensor, and carries described pcb board to be measured;
Described voltage detection module is used for according to the steering order of described main control module, voltage to pcb board to be measured detects, and after completing, detection detects data to described main control module feedback, wherein, described voltage detection module comprises: voltage signal sampling holding unit, reference voltage generation unit, AD Date Conversion Unit and high-speed serial data communication unit, wherein said voltage signal sampling holding unit is connected with AD Date Conversion Unit, described reference voltage generation unit is connected with AD Date Conversion Unit, and described AD Date Conversion Unit is connected with high-speed serial data communication unit, by described high-speed serial data communication unit, mode and the main control module with SPI agreement connects described voltage detection module, described high-speed serial data communication unit isolation digital signal.
2. pcb board pick-up unit as claimed in claim 1, it is characterized in that, described pcb board pick-up unit also comprises data client, and it is for sending described user instruction to described main control module, and receives, stores detection data and the testing result of described main control module feedback.
3. pcb board pick-up unit as claimed in claim 1, is characterized in that, described Fibre Optical Sensor comprises: transmitting terminal and receiving end; Described transmitting terminal and receiving end are arranged on respectively the fixed position on fixed jig, and transmitting terminal and receiving end are adjusted on same straight line.
4. pcb board pick-up unit as claimed any one in claims 1 to 3, is characterized in that, described main control module comprises: MCU unit, NVRAM unit, RTC unit, keyboard, I/O unit, SPI interface and RS232 unit;
Described MCU unit is the control core of described pcb board pick-up unit; NVRAM unit is used for preserving setting parameter; RTC unit provides system clock; Keyboard is used for setting input; I/O unit for detection of, control; SPI interface is used for and voltage detection module swap data; RS232 is for being connected with data client.
5. a pcb board detection method, is characterized in that, this detection method comprises the following steps:
The SN code of pcb board to be measured is scanned into data client, by data client, sends user instruction notice main control module and start test;
The curved detection module of main control module control panel starts the curved detection of plate, and receives the detection data of the curved detection module feedback of described plate, distinguishes defective products, and this step comprises: described pcb board to be measured is put into fixed jig, on described fixed jig, Fibre Optical Sensor is installed; If described pcb board to be measured has crooked phenomenon, crooked part will hinder the conduction of light beam, thereby trigger Fibre Optical Sensor output alarm signal, thereby whether described main control module there is output alarm signal to judge whether described pcb board to be measured is defective products by detecting described Fibre Optical Sensor;
To by the pcb board to be measured of the curved detection of described plate, main control module is controlled voltage detection module trigger voltage and is detected, and receive the detection data of described voltage detection module feedback, distinguish defective products, this step comprises: voltage detection module detects the voltage signal of voltage check point on described pcb board to be measured and samples, described voltage signal first passes through resistance pressure-dividing network, voltage follow, after holding circuit, enter AD Date Conversion Unit, meanwhile reference voltage is also input to AD Date Conversion Unit, in AD Date Conversion Unit, complete by simulating signal the conversion to digital signal, finally by data communication units, magnitude of voltage is sent to main control module,
By all detection data packing uploading data client storage, for follow-up data analysis.
CN201210561117.8A 2013-04-02 2013-04-02 Printed circuit board (PCB) detecting device and corresponding method CN103149527B (en)

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