CN220691404U

CN220691404U - Scanning detection circuit

Info

Publication number: CN220691404U
Application number: CN202321160612.8U
Authority: CN
Inventors: 田长亮
Original assignee: Wuhan Yi De Long Technology Co ltd
Current assignee: Wuhan Yi De Long Technology Co ltd
Priority date: 2023-05-15
Filing date: 2023-05-15
Publication date: 2024-03-29
Anticipated expiration: 2033-05-15

Abstract

The utility model provides a scanning detection circuit which comprises a conveying unit, at least two plate requiring units, a plate stopping detection unit, at least one code scanning unit and a control unit, wherein a printed plate is conveyed to the conveying unit through the plate requiring unit on one side, when the printed plate moves to the detection position of the plate stopping detection unit, the control unit controls the two plate requiring units and the conveying unit to be suspended and controls the code scanning unit to identify the printed plate, signals are returned to the control unit after identification, the control unit controls the conveying unit and the two plate requiring units to continuously move, the plate on the conveying unit is conveyed to the plate requiring unit on the other side to be printed, and the repeated sequential actions are realized.

Description

Scanning detection circuit

Technical Field

The utility model relates to the technical field of code scanning detection, in particular to a scanning detection circuit.

Background

Printing is a technique of transferring ink onto the surfaces of paper, textile, plastic, leather, PVC, PC and other materials by plate making, inking, pressurizing and other procedures on originals such as characters, pictures, photos and anti-counterfeiting, and is a process of transferring approved printing plates to a printing stock through printing machinery and special ink.

The utility model provides a planar sheet material printing conveyor with publication number CN106081496A, includes the carriage, and the carriage includes two curb plates that are parallel to each other, is provided with at least a pair of cylinder that are parallel to each other between the curb plate of both sides, winds on the cylinder has the conveyer belt, and the inboard of both sides board is provided with a plurality of balls respectively, and a plurality of balls on every curb plate all are the alignment of a straight line, and the straight line that a plurality of balls were arranged is parallel with the conveyer belt.

The plate conveying device in the prior art directly places a large number of plates on the conveyor belt to convey towards the printer side, but when the plates are conveyed to the printer for printing, the conveying device can be shielded and disconnected at the moment, the plates are easy to displace, and the positions of the plates in the printer are inaccurate, so that adverse effects are caused on plate printing.

Disclosure of Invention

In view of the above, the utility model provides a scanning detection circuit which can realize sequential continuous conveying and printing of plates, has good position positioning effect of the plates in the production process, can not generate displacement, avoids influencing the printing of the plates, and improves the printing effect.

The technical scheme of the utility model is realized as follows: the utility model provides a scanning detection circuit, which comprises a conveying unit, at least two board waiting units, a board stopping detection unit, at least one code scanning unit and a control unit, wherein,

the conveying unit is electrically connected with the control unit, two sides of the conveying unit are respectively provided with a feeding side and a printing side, and the conveying unit is used for conveying the plate towards the printing side;

the at least two plate-requiring units are respectively arranged on the feeding side and the printing side of the conveying unit, the at least two plate-requiring units are electrically connected with the control unit, the feeding side plate-requiring unit is used for conveying the plates to the conveying unit, and the printing side plate-requiring unit is used for receiving the plates conveyed by the conveying unit;

the board stopping detection unit is arranged on the conveying unit and is electrically connected with the control unit, and the board stopping detection unit is used for detecting whether the board reaches a designated position on the conveying unit;

at least one code scanning unit is arranged on one side of the conveying unit relatively and is electrically connected with the control unit, the code scanning unit is used for scanning and identifying the marks of the plates on the conveying unit in a stop state, and the code scanning unit, the two plate requiring units and the conveying unit are in alternate gap operation.

On the basis of the above technical scheme, preferably, the board unit includes an optocoupler U3, a resistor R1, a resistor R3, a resistor R4, a third transistor Q1, a photodiode D2, a resistor R2, a photodiode D1, a relay K1, a connector J8 and a board conveying motor, wherein a pin 1 of the optocoupler U3 is electrically connected with one end of the resistor R1, the other end of the resistor R1 is connected with +5V voltage, a pin 2 of the optocoupler U3 is electrically connected with an input end of a control unit, a pin 3 of the optocoupler U3 is electrically connected with one end of the resistor R3, the other end of the resistor R3 is electrically connected with a base electrode of the third transistor Q1 and one end of the resistor R4 respectively, an emitter electrode of the third transistor Q1 is grounded with the other end of the resistor R4, a base electrode of the third transistor Q1 is electrically connected with a cathode of the photodiode D2, an anode of the photodiode D1 and one end of a coil of the relay K1 respectively, the anode of the photodiode D2 is electrically connected with one end of the other end of the photodiode D2, the other end of the photodiode R2 is electrically connected with one end of the other end of the relay K1, the other end of the photodiode D1 and the other end of the relay K1 is electrically connected with one end of the coil of the relay K1, the other end of the relay K1 is electrically connected with the other end of the relay B1 through the low-level control unit, and the signal of the board is connected with the light emitting diode Q1 is connected with the board through the low-level C3, the relay C and the relay C1 is connected to be connected with the low-level C3.

On the basis of the technical scheme, preferably, the conveying unit comprises a conveying control relay and a track conveying motor, wherein one end of a coil of the conveying controller relay is electrically connected with the output end of the control unit, the other end of the coil of the conveying controller relay is connected with +24V voltage, and two ends of a contact of the conveying controller relay are respectively electrically connected with the output end and the input end of the conveying motor; and the contact of the conveying control relay is controlled to be disconnected through the output signal of the control unit, and the rail conveying motor is controlled to stop running.

On the basis of the technical scheme, preferably, the stop plate detection unit comprises a stop plate sensing module and a code scanning triggering module, wherein the output end of the stop plate sensing module is electrically connected with the input end of the control unit; the input end of the code scanning triggering module is electrically connected with the output end of the control unit, the output end of the code scanning triggering module is electrically connected with the input end of the code scanning unit, the board stopping sensing module is used for detecting that the board reaches the appointed position on the conveying unit and outputting a signal to the control unit, and the control unit sends the signal to the code scanning triggering module to control the code scanning unit to recognize the board.

On the basis of the technical scheme, the automatic code scanning device preferably further comprises a switching module, wherein the number of the code scanning units is at least two, and the at least two code scanning units are respectively arranged on two sides of the conveying unit and are perpendicular to the conveying surface of the conveying unit; the switching module comprises at least two single-pole double-throw switches, the at least two single-pole double-throw switches are respectively and electrically connected with each code scanning unit, and the at least two code scanning units are used for selectively starting the code scanning units on the sides corresponding to the plate identification surfaces.

On the basis of the technical scheme, the mobile terminal preferably further comprises a communication conversion module, wherein the input end of the communication conversion module is electrically connected with the output end of the control unit, the output end of the communication conversion module is electrically connected with the input end of the code scanning unit, the output end of the code scanning unit is electrically connected with the input end of the control unit, and the communication conversion module is used for converting and transmitting signal communication between the control unit and the code scanning unit.

Based on the above technical solution, preferably, the chip model of the communication conversion module is PL-2303SA.

On the basis of the technical scheme, the power supply unit preferably further comprises a power supply unit, wherein the power supply unit comprises a first power supply module and a second power supply module, and the first power supply module is electrically connected with the relay K1, the conveying control relay and the stop plate induction module and is used for providing +24V voltage; the second power supply module is electrically connected with the control unit and is used for providing +5V voltage.

On the basis of the technical scheme, preferably, the power supply unit further comprises a voltage stabilizing module, wherein the input end of the voltage stabilizing module is electrically connected with the output end of the second power supply module, and the output end of the voltage stabilizing module is electrically connected with the input end of the code scanning trigger controller and used for converting a +5V direct current power supply into +3.3V output voltage to supply power to the code scanning trigger controller.

Based on the technical scheme, preferably, the chip model of the voltage stabilizing module is AMS1117-3.3.

Compared with the prior art, the scanning detection circuit has the following beneficial effects:

1. the printing plate is conveyed to the conveying unit through the plate-requiring unit on one side, when the printing plate moves to the detection position of the plate-stopping detection unit, the control unit controls the two plate-requiring units and the conveying unit to be suspended, controls the code scanning unit to identify the printing plate, and returns signals to the control unit again after the identification, the control unit controls the conveying unit and the two plate-requiring units to continuously move, so that the plate on the conveying unit is conveyed to the plate-requiring unit on the other side for printing, and the repeated sequential actions are performed, so that the single-piece flow operation of the printing plate is realized, and in the feeding and printing process, the plate is continuously fed and printed through the single-piece flow, so that the situation of inaccurate plate displacement and positioning does not exist, and the quality and the efficiency of plate printing are effectively ensured;

2. the code scanning units respectively arranged at the upper side and the lower side of the conveying unit are matched with the switching module, the code scanning units at the corresponding sides of the printing plates can be selectively opened, and the code scanning units at the other sides are in a pause rest state, so that energy and electricity are saved.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a scan detection circuit according to the present utility model;

FIG. 2 is a circuit diagram showing a connection between a control unit and a communication conversion module of the scan detection circuit of the present utility model;

FIG. 3 is a circuit diagram of a main board unit of the scan detection circuit of the present utility model;

FIG. 4 is a circuit diagram of a conveying unit of the scan detection circuit of the present utility model;

FIG. 5 is a circuit diagram of a stop plate sensing module of the scan detection circuit of the present utility model;

FIG. 6 is a circuit diagram of a scan code trigger module of the scan detection circuit of the present utility model;

FIG. 7 is a circuit diagram of a code scanning unit of the scan detection circuit of the present utility model;

FIG. 8 is a circuit diagram of a switching module of the scan detection circuit of the present utility model;

fig. 9 is a circuit diagram of a power supply unit of the scan detection circuit of the present utility model.

Detailed Description

The following description of the embodiments of the present utility model will clearly and fully describe the technical aspects of the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, are intended to fall within the scope of the present utility model.

As shown in fig. 1-9, the scanning detection circuit of the utility model comprises a conveying unit 1, at least two board waiting units 2, a board stopping detection unit 3, at least one code scanning unit 4 and a control unit 5, wherein the conveying unit 1 is electrically connected with the control unit 5, two sides of the conveying unit 1 are respectively provided with a feeding side and a printing side, and the conveying unit 1 is used for conveying boards towards the printing side; the at least two plate units 2 are respectively arranged on the feeding side and the printing side of the conveying unit 1, the at least two plate units 2 are electrically connected with the control unit 5, the feeding side plate units 2 are used for conveying the plates to the conveying unit 1, and the printing side plate units 2 are used for receiving the plates conveyed by the conveying unit 1; the board stopping detection unit 3 is arranged on the conveying unit 1 and is electrically connected with the control unit 5, and the board stopping detection unit 3 is used for detecting whether the board reaches a designated position on the conveying unit 1; at least one code scanning unit 4 is oppositely arranged at one side of the conveying unit 1 and is electrically connected with the control unit 5, the code scanning unit 4 is used for scanning and identifying the marks of the plates on the conveying unit in a stop state, and the code scanning unit 4, the two plate requiring units 2 and the conveying unit 1 are alternately operated at intervals.

It should be noted that, when the printed board passes through the board unit 2 on one side and is fed to the conveying unit 1, when the printed board moves to the detection position of the board stopping detection unit 3, the control unit 5 sends out a pause signal to the two board units 2, and simultaneously sends out a code scanning signal to the code scanning unit 4, after the code scanning unit 4 recognizes the mark on the printed board, the recognition signal is returned to the control unit 5 again, at this time, the control unit 5 sends out a signal to the two board units 2, so that the board on the conveying unit 1 is conveyed to the board unit 2 on the other side for printing, and then a new board is fed again, and the sequential actions are repeated, so that the single-piece flow line production of the printed board is realized.

The conveying unit 1 in the embodiment comprises a conveying control relay and a track conveying motor, wherein one end of a coil of the conveying controller relay is electrically connected with the output end of the control unit 5, the other end of the coil of the conveying controller relay is connected with +24V voltage, and two ends of a contact of the conveying controller relay are respectively electrically connected with the output end and the input end of the conveying motor; the contact of the conveying control relay is controlled to be opened through the output signal of the control unit 5, and the rail conveying motor is controlled to stop running.

Specifically, the conveying unit 1 in this embodiment includes an optocoupler U5, a resistor R9, a resistor R10, a resistor R11, a transistor Q3, a photodiode D5, a resistor R12, a photodiode D6, a relay K3, a connector J12, and a track conveying motor, where a pin 1 of the optocoupler U5 is electrically connected to one end of the resistor R9, the other end of the resistor R9 is connected to +5v voltage, a pin 2 of the optocoupler U5 is electrically connected to an input end of the control unit 5, a pin 3 of the optocoupler U5 is electrically connected to one end of the resistor R10, the other end of the resistor R10 is electrically connected to a base of the transistor Q3 and one end of the resistor R11, an emitter of the transistor Q3 is grounded to the other end of the resistor R12, a base electrode of the transistor Q3 is electrically connected to the negative electrode of the photodiode D5, a positive electrode of the photodiode D6 and one end of a coil of the relay K3 are electrically connected to one end of the photodiode D6, the other end of the photodiode D6 is electrically connected to one end of the resistor R12, the other end of the photodiode D6, the negative electrode of the coil of the photodiode D3 and the coil of the relay K3 are electrically connected to the track 12 via the other end of the relay K12.

In this embodiment, after receiving the signal of the stop board detecting unit 3 through the control unit 5, a low-level signal is output to the conveying unit 1 to make the optocoupler U5 emit light and turn on, so that the triode Q3 controls the relay K3 to switch off, and further controls the rail conveying motor to stop rotating.

Wherein the relay K3 serves as a conveyance control relay of the conveyance unit 1.

The board unit 2 in this embodiment includes an optocoupler U3, a resistor R1, a resistor R3, a resistor R4, a third transistor Q1, a photodiode D2, a resistor R2, a photodiode D1, a relay K1, a connector J8, and a board conveying motor, where a pin 1 of the optocoupler U3 is electrically connected with one end of the resistor R1, the other end of the resistor R1 is connected with +5v voltage, the pin 2 of the optocoupler U3 is electrically connected with an input end of the control unit 5, the pin 3 of the optocoupler U3 is electrically connected with one end of the resistor R3, the other end of the resistor R3 is electrically connected with a base of the third transistor Q1 and one end of the resistor R4, an emitter of the third transistor Q1 is grounded with the other end of the resistor R4, a base electrode of the third transistor Q1 is electrically connected with a cathode of the photodiode D2, an anode of the photodiode D1 and one end of a coil of the relay K1 are electrically connected, an anode of the photodiode D2 is electrically connected with one end of the resistor R2, the other end of the photodiode D1 and the other end of the coil of the relay K1 are electrically connected with the board conveying motor through the +24v.

After receiving the signal from the board stopping detection unit 3, the control unit 5 outputs a low-level signal to the board waiting unit 2 to make the optocoupler U3 emit light and turn on, so that the triode Q1 controls the relay K1 to switch off the contact, and further controls the board waiting conveying motor to stop rotating.

The light-sensitive diode D5 and the light-sensitive diode D2 are signal output indication LED lamps, when data are transmitted in communication, the light-sensitive diode D5 and the light-sensitive diode D2 flash, the light-sensitive diode D6 and the light-sensitive diode D1 are all free wheeling diodes, the free wheeling diodes are respectively provided for a discharging loop of the relay K1 and the relay K3, and high-voltage pulses after the relay is powered off are released to play a role in protection.

The board stopping detection unit 3 in the embodiment comprises a board stopping induction module and a code scanning triggering module, wherein the output end of the board stopping induction module is electrically connected with the input end of the control unit 5; the input end of the code scanning triggering module is electrically connected with the output end of the control unit 5, the output end of the code scanning triggering module is electrically connected with the input end of the code scanning unit 4, the board stopping sensing module is used for detecting that the board reaches the appointed position on the conveying unit 1 and outputting a signal to the control unit 5, and the control unit 5 sends the signal to the code scanning triggering module to control the code scanning unit 4 to recognize the board.

It should be noted that, when the stop plate sensing module detects whether the printed board reaches the designated position of the conveying unit 1, the stop plate sensing module sends a signal to the control unit 5, the control unit 5 sends a signal to the code scanning triggering module after receiving the signal, the code scanning triggering module triggers and conducts after receiving the signal and sends a signal to the code scanning unit 4, the code scanning unit 4 identifies the board on the corresponding side after receiving the signal, and the signal is returned to the control unit 5 again after the identification.

The board stopping induction module is used for detecting boards after delaying for 5 seconds when judging whether the printed boards reach, indicating that the printed boards reach after delaying, avoiding the sensor from being touched by mistake if the board stopping signal is still in the middle of delaying, controlling the conveying unit 1, the two board waiting units 2 to operate after the signal returns to the control unit 5 after the code scanning, delaying for two seconds and the like, and detecting the printed boards after passing through the conveying unit 1 by the board stopping induction module, and continuing waiting if the printed boards do not pass through.

Specifically, the stop plate sensing module in this embodiment includes a stop plate sensor, a connector J6, a resistor R17, a resistor R26 and a capacitor C12, where an output end of the stop plate sensor is electrically connected to an input end of the connector J6, a pin 3 of the connector J6 is connected to +24v voltage, a pin 2 of the connector J6 is electrically connected to one end of the resistor R17, the other end of the resistor R17 is electrically connected to one end of the resistor R26, a pin 1 of the connector J6 is commonly grounded to the other end of the resistor R26, a common end of the resistor R26 and the resistor R17 is electrically connected to an input end of the control unit 5, one end of the capacitor C12 is electrically connected to a common end of the resistor R26 and the resistor R17, and the other end of the capacitor C12 is grounded.

After detecting that the plate is in place on the conveying unit 1, a signal is sent to the control unit 5 by the plate stopping sensor, wherein the resistor R26 and the resistor R17 are serially connected and divided, and the voltage of 24V is divided to about 4.4V.

Specifically, the code scanning triggering module in this embodiment includes an optocoupler U6, a resistor R13 and a resistor R14, where a pin 2 of the optocoupler U6 is electrically connected to an output end of the control unit 5, a pin 1 of the optocoupler U6 is electrically connected to one end of the resistor R13, the other end of the resistor R13 is connected to +5v voltage, a pin 4 of the optocoupler U6 is electrically connected to an input end of the code scanning unit 4 and one end of the resistor R14, and the other end of the resistor R14 is connected to +3.3v voltage.

The control unit 5 sends a low level signal to the optocoupler U6 to turn on the optocoupler and sends a signal to the code scanning unit 4.

The automatic code scanning device further comprises a switching module, wherein the number of the code scanning units 4 is at least two, and the at least two code scanning units 4 are respectively arranged at two sides of the conveying unit 1 and are perpendicular to the conveying surface of the conveying unit 1; the switching module comprises at least two single-pole double-throw switches, the at least two single-pole double-throw switches are respectively and electrically connected with the code scanning units 4, and the at least two code scanning units 4 are used for selectively starting the code scanning units 4 on the sides corresponding to the plate identification surfaces.

It should be noted that, in this embodiment, the number of the code scanning units 4 is two, and the code scanning units 4 are separately disposed on the upper and lower sides of the conveying unit 1 and symmetrically disposed, and the code scanning units 4 on the corresponding sides of the printing plates can be selectively opened in cooperation with the switching module, and the code scanning units 4 on the other side are in a suspended state, so that energy and electricity are saved.

The embodiment further includes a communication conversion module, where an input end of the communication conversion module is electrically connected with an output end of the control unit 5, an output end of the communication conversion module is electrically connected with an input end of the code scanning unit 4, an output end of the code scanning unit 4 is electrically connected with an input end of the control unit 5, and the communication conversion module is used for signal communication conversion transmission between the control unit 5 and the code scanning unit 4.

The communication conversion module comprises a resistor R19, a resistor R18, a photodiode D10, a photodiode D9, a resistor R20, a voltage stabilizing diode D11, a chip U1, a USB connector J5, a resistor R23, a resistor R21, a resistor R22, a capacitor C6, a capacitor C7, a capacitor C8, a switch SW2, a resistor R25, a photodiode D13 and a diode D12, wherein the output end of the control unit 5 is respectively and electrically connected with the cathode of the photodiode D9 and one end of the resistor R20, the other end of the R20 is electrically connected with the input end of the chip U1, the anode of the photodiode D9 is electrically connected with one end of the resistor R18, the input end of the control unit 5 is respectively and electrically connected with the cathode of the photodiode D10 and the anode of the voltage stabilizing diode D11, the cathode of the voltage stabilizing diode D11 is electrically connected with the output end of the chip U2, the anode of the photodiode D10 is electrically connected with one end of the resistor R19, the other end of the resistor R19 is connected with a VCC power supply together with the resistor R18, the pin 8 of the chip U1 is electrically connected with one end of the capacitor C8, the other end of the capacitor C8 is grounded, the pin 6 of the chip U1 is electrically connected with one end of the resistor R22, the other end of the resistor R22 is electrically connected with the pin 2 of the USB connector J5, the pin 5 of the chip U1 is electrically connected with one end of the resistor R21, the other end of the resistor R21 is electrically connected with the pin 3 of the USB connector J5 and one end of the resistor R23 respectively, the other end of the resistor R23 is electrically connected with the pin 8 of the chip U1, the pin 1 of the USB connector J5 is electrically connected with the capacitor C6 and the capacitor C7 respectively and the switch SW2, the other end of the switch SW2 is electrically connected with one end of the resistor R25 and the anode of the diode D12 respectively, the cathode of the diode D12 is connected with the VCC power supply, the other end of the resistor R25 is electrically connected with the anode of the photodiode D13, the cathode of the photodiode D13 is electrically connected with the capacitor C6, the other end of the capacitor C7 is commonly grounded.

It should be noted that the communication conversion module is an RS232-USB interface converter, so as to realize conversion between USB signals and RS232 signals.

Specifically, the chip model of the communication conversion module in the present embodiment is PL-2303SA.

The power supply unit comprises a first power supply module and a second power supply module, wherein the first power supply module is electrically connected with the relay K1, the conveying control relay and the stop plate induction module and is used for providing +24V voltage; the second power supply module is electrically connected with the control unit 5 and is used for providing +5V voltage.

The power supply unit comprises a connector J7, a switch SW3, a capacitor C4, a capacitor SW4, a capacitor C3, a capacitor C10, a resistor R15, a photodiode D7 and a magnetic core coil L1, wherein a pin 3 of the connector J7 is electrically connected with one end of the switch SW3, the other end of the switch SW3 is electrically connected with the positive pole of the capacitor C4 and +24V voltage, the other end of the capacitor C4 is grounded, a pin 2 of the connector J7 is electrically connected with one end of the switch SW4, the other end of the SW4 is respectively connected with +5V voltage and one end of the magnetic core coil L1, the other end of the magnetic core coil L1 is connected with a VCC power supply, one end of the pin 2 of the connector J7 is electrically connected with the negative pole of the capacitor C3 and one end of the capacitor C10 and is grounded, and both the positive pole of the capacitor C3 and the other end of the capacitor C10 are electrically connected with one end of the magnetic core coil L1 away from the VCC power supply.

The power supply unit in this embodiment further includes a voltage stabilizing module, where an input end of the voltage stabilizing module is electrically connected to an output end of the second power supply module, and an output end of the voltage stabilizing module is electrically connected to an input end of the code scanning trigger controller, and is configured to convert a +5v dc power supply into a +3.3v output voltage to supply power to the code scanning trigger controller.

The voltage stabilizing module comprises a chip U7, a capacitor C1 and a capacitor C2, wherein a pin 3 of the chip U7 is connected with +5V voltage, a pin 3 of the chip U2 is connected with +3.3V voltage, two ends of the capacitor C1 are respectively connected with +5V voltage and ground, and two ends of the capacitor C2 are respectively connected with +3.3V voltage and ground.

Specifically, the voltage stabilizing module in this embodiment has a chip model number AMS1117-3.3, i.e., a chip model number U7.

Specifically, the chip model of the control unit 5 is STC15W408AS-35I-LQFP44.

Working principle:

when the printed board is conveyed to a designated position on the conveying unit 1, a sensor detected by the board stopping sensing module detects and generates a signal to the control unit 5, the control unit 5 sends a signal to the code scanning triggering module after receiving the signal, the code scanning triggering module triggers and conducts after receiving the signal and sends the signal to the code scanning unit 4, the code scanning unit 4 recognizes the board on the corresponding side after receiving the signal, the recognized signal is returned to the control unit 5 again after being recognized, the control unit 5 generates signals to the two board requiring units 2 and the conveying unit 1 again, and the two board requiring units 2 and the conveying unit 1 are controlled to start synchronously, so that the board on the conveying unit 1 is conveyed to the board requiring unit 2 on the other side for printing.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims

1. A scan detection circuit, characterized by: comprises a conveying unit (1), at least two plate requiring units (2), a plate stopping detection unit (3), at least one code scanning unit (4) and a control unit (5), wherein,

the conveying unit (1) is electrically connected with the control unit (5), the two sides of the conveying unit (1) are respectively provided with a feeding side and a printing side, and the conveying unit (1) is used for conveying the plate towards the printing side;

the at least two plate units (2) are respectively arranged on the feeding side and the printing side of the conveying unit (1), and the at least two plate units (2) are electrically connected with the control unit (5), wherein the feeding side plate units (2) are used for conveying plates to the conveying unit (1), and the printing side plate units (2) are used for receiving the plates conveyed by the conveying unit (1);

the board stopping detection unit (3) is arranged on the conveying unit (1) and is electrically connected with the control unit (5), and the board stopping detection unit (3) is used for detecting whether the board reaches a designated position on the conveying unit (1);

at least one code scanning unit (4) is oppositely arranged on one side of the conveying unit (1) and is electrically connected with the control unit (5), the code scanning unit (4) is used for scanning and identifying the marks of the plates on the conveying unit in a stop state, and the code scanning unit (4), the two plate requiring units and the conveying unit are in alternate gap operation.

2. The scan detection circuit of claim 1, wherein: the board unit (2) comprises an optical coupler U3, a resistor R1, a resistor R3, a resistor R4, a triode Q1, a photodiode D2, a resistor R2, a photodiode D1, a relay K1, a connector J8 and a board conveying motor, wherein a pin 1 of the optical coupler U3 is electrically connected with one end of the resistor R1, the other end of the resistor R1 is connected with +5V voltage, a pin 2 of the optical coupler U3 is electrically connected with an input end of a control unit (5), a pin 3 of the optical coupler U3 is electrically connected with one end of the resistor R3, the other end of the resistor R3 is electrically connected with a base electrode of the triode Q1 and one end of the resistor R4 respectively, an emitter electrode of the triode Q1 is grounded with the other end of the resistor R4, a base electrode of the triode Q1 is electrically connected with a cathode of the photodiode D2, one end of a coil of the photodiode D1 respectively, the anode of the photodiode D2 is electrically connected with one end of the resistor R2, the other end of the photodiode D1 is electrically connected with one end of the relay K1, the other end of the photodiode D1 is electrically connected with the other end of the coil of the relay K1 through the relay K1 to the low-level, the light emitting motor is connected with the board through the control unit, the light emitting device is connected with the light emitting device, and the board is connected with the light emitting device, the light emitting device and the light emitting device.

3. The scan detection circuit of claim 2, wherein: the conveying unit (1) comprises a conveying control relay and a rail conveying motor, wherein one end of a coil of the conveying controller relay is electrically connected with the output end of the control unit (5), the other end of the coil of the conveying controller relay is connected with +24V voltage, and two ends of a contact of the conveying controller relay are respectively electrically connected with the output end and the input end of the conveying motor; the contact of the conveying control relay is controlled to be opened by the output signal of the control unit (5), and the rail conveying motor is controlled to stop running.

4. A scan detection circuit according to claim 3, wherein: the board stopping detection unit (3) comprises a board stopping induction module and a code scanning triggering module, wherein the output end of the board stopping induction module is electrically connected with the input end of the control unit (5); the input end of the code scanning triggering module is electrically connected with the output end of the control unit (5), the output end of the code scanning triggering module is electrically connected with the input end of the code scanning unit (4), the stop plate sensing module is used for detecting that a plate reaches a designated position on the conveying unit (1) and outputting a signal to the control unit (5), and the control unit (5) sends a signal to the code scanning triggering module to control the code scanning unit (4) to identify the plate.

5. The scan detection circuit of claim 1, wherein: the automatic code scanning device further comprises a switching module, wherein the number of the code scanning units (4) is at least two, and the at least two code scanning units (4) are respectively arranged at two sides of the conveying unit (1) and are perpendicular to the conveying surface of the conveying unit (1); the switching module comprises at least two single-pole double-throw switches, the at least two single-pole double-throw switches are respectively and electrically connected with each code scanning unit (4), and the at least two code scanning units (4) are used for selectively starting the code scanning units (4) on the sides corresponding to the plate identification surfaces.

6. The scan detection circuit of claim 1, wherein: the device further comprises a communication conversion module, wherein the input end of the communication conversion module is electrically connected with the output end of the control unit (5), the output end of the communication conversion module is electrically connected with the input end of the code scanning unit (4), the output end of the code scanning unit (4) is electrically connected with the input end of the control unit (5), and the communication conversion module is used for signal communication conversion transmission between the control unit (5) and the code scanning unit (4).

7. The scan detection circuit of claim 6, wherein said communication conversion module has a chip model PL-2303SA.

8. The scan detection circuit of claim 4, wherein: the power supply unit comprises a first power supply module and a second power supply module, wherein the first power supply module is electrically connected with the relay K1, the conveying control relay and the stop plate induction module and is used for providing +24V voltage; the second power supply module is electrically connected with the control unit (5) and is used for providing +5V voltage.

9. The scan detection circuit of claim 8, wherein: the power supply unit further comprises a voltage stabilizing module, wherein the input end of the voltage stabilizing module is electrically connected with the output end of the second power supply module, the output end of the voltage stabilizing module is electrically connected with the input end of the code scanning trigger controller, and the voltage stabilizing module is used for converting a +5V direct-current power supply into +3.3V output voltage to supply power to the code scanning trigger controller.

10. The scan detection circuit of claim 9, wherein: the chip model of the voltage stabilizing module is AMS1117-3.3.