CN113485170B - Industrial grade control board - Google Patents
Industrial grade control board Download PDFInfo
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- CN113485170B CN113485170B CN202110612359.4A CN202110612359A CN113485170B CN 113485170 B CN113485170 B CN 113485170B CN 202110612359 A CN202110612359 A CN 202110612359A CN 113485170 B CN113485170 B CN 113485170B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0428—Safety, monitoring
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/21—Pc I-O input output
- G05B2219/21014—Interface, module with relays
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24125—Watchdog, check at timed intervals
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25171—Serial, RS232
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25176—RS485, differential data signals, xor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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Abstract
The invention discloses an industrial control board, which comprises a main control unit, a plurality of paths of IO control interfaces and a plurality of paths of communication interfaces, wherein the main control unit is integrated on the same circuit board and comprises: the invention is improved from multiple aspects, has stable communication, high control reliability and excellent electrical isolation performance, ensures the feasibility of integrating all circuits on one circuit board, and finally realizes high integration, high stability and high reliability, CAN be applied to industrial application equipment such as self-service gate machines, industrial logic control, self-service storage cabinets and the like, and is applied to industrial application equipment relating to data communication such as RS232, RS485/422, CAN buses, high-speed digital IO and the like.
Description
Technical Field
The invention relates to the field of bottom layer control, in particular to an industrial-grade control board.
Background
The bottom layer control of the current gate machine comprises a plurality of control links such as communication, channel light curtain trailing detection (PEBeam), multi-path IO control and the like, a plurality of circuit boards are needed, and the integration level is not high. In addition, the electronic circuit board generally has the problem of poor stability in product application, especially in the field of consumer electronics for various reasons (mainly due to design maturity, cost, etc.), such as: the problems of component or circuit damage, program run out of control, communication disturbed communication failure and the like occur in the using process due to electrical interference sources such as an electrical electromagnetic field (EMI), high and low frequency signals, equipment static electricity and the like, so that the product cannot be normally used, and the after-sale operation cost is increased.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide an industrial control board with good integration level, reliability and stability, aiming at the defects of low integration level, poor reliability and poor stability in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: construct an industrial grade control board, including integrated master control unit, multichannel IO control interface, multichannel communication interface on same circuit board, wherein, master control unit includes:
a main control chip;
the multiple IO isolation circuits correspond to the multiple IO control interfaces, and each IO isolation circuit is connected between the main control chip and the corresponding IO control interface to realize IO isolation;
each path of communication isolation circuit is connected between the main control chip and the corresponding path of communication interface to realize communication isolation;
the main input isolation power supply is used for accessing an external power supply to carry out DCDC voltage transformation isolation to obtain various power supplies required by the control panel;
and each path of communication isolation power supply is connected between the main input isolation power supply and one path of corresponding communication interface and used for obtaining a required power supply from the main input isolation power supply to supply power to the corresponding path of communication interface after DCDC voltage stabilization isolation is carried out on the required power supply so as to realize power supply isolation of the communication interface.
Preferably, the multi-channel IO isolation circuit includes an optical coupling isolation circuit connected between an input port in the IO control interface and the main control chip, and a digital isolation circuit connected between an output port in the IO control interface and the main control chip.
Preferably, the multipath communication interface includes a first high-speed CAN transceiver, a high-speed low-power consumption RS232 chip and a full-duplex RS485/422 chip, and the multipath communication isolation circuit includes:
the first digital isolator is connected between the main control chip and the first high-speed CAN transceiver;
the second digital isolator is connected between the main control chip and the high-speed low-power-consumption RS232 chip;
and the third digital isolator is connected between the main control chip and the full-duplex RS485/422 chip.
Preferably, the main input isolation power supply comprises a first isolated DCDC power supply module converting 12V to 5V;
the multiplex communication isolated power supply comprises:
the second isolated DCDC power supply module is used for converting 5V into 5V and is connected with the power supply end of the first high-speed CAN transceiver;
the third isolated DCDC power supply module is used for converting 5V into 5V and is connected with the power supply end of the high-speed low-power-consumption RS232 chip;
and the fourth isolated DCDC power supply module for converting 5V into 5V is connected with the power supply end of the full-duplex RS485/422 chip.
Preferably, the main control chip adopts AT91SAM7X256, the first high-speed CAN transceiver adopts TJA1050, the high-speed low-power RS232 chip adopts SP3232, the full-duplex RS485/422 chip adopts MAX488ESA, the first digital isolator, the second digital isolator, and the third digital isolator all adopt admm 1201, the first isolated DCDC power module adopts HDW5-12S05, and the second isolated DCDC power module, the third isolated DCDC power module, and the fourth isolated DCDC power module all adopt B0505S-1WR 2;
Preferably, the multipath communication interface further comprises:
the first interface is used for being in butt joint with an external CAN interface and comprises three pins which are respectively connected with pins 7, 6 and 2 of the first high-speed CAN transceiver;
the second interface is used for being in butt joint with an external RS232 interface and comprises three pins which are respectively connected with pins 8, 7 and 15 of the high-speed low-power-consumption RS232 chip;
the third interface is used for being in butt joint with an external RS485/422 interface and comprises pins A _485, B _485, Z _485, Y _485 and G _485, fourteen resistors are connected between the pins A _485 and B _485, the pins A _485, B _485 and G _485 are respectively connected with pins 8, 7 and 4 of the full-duplex RS485/422 chip, and the pins Z _485 and Y _485 are respectively connected with pins 6 and 5 of the full-duplex RS485/422 chip through a fifteen resistor and a sixteen resistor.
Preferably, the main input isolated power supply further includes an external power interface, an eleventh capacitor is connected between a power positive pin and a power negative pin of the external power interface, pin 1 of the first isolated DCDC power supply module is connected to the power negative pin of the external power interface, pin 2 of the first isolated DCDC power supply module is connected to the power positive pin of the external power interface via a fuse, a twelfth capacitor and a fourth electrolytic capacitor which are connected in parallel with each other are connected between pins 3 and 4 of the first isolated DCDC power supply module, a fourth light emitting diode and a seventeenth resistor which are connected in series are further connected between pins 3 and 4 of the first isolated DCDC power supply module, a thirteenth capacitor, a fifth electrolytic capacitor and a voltage stabilizing diode which are connected in parallel with each other are connected between pins 1 and 2 of the first isolated DCDC power supply module, and pin 1 of the first isolated DCDC power supply module, And a fifth light-emitting diode and an eighteenth resistor which are connected in series are also connected between the pins 2.
Preferably, the light curtain trailing detection circuit integrated on the circuit board is further included, and the light curtain trailing detection circuit includes:
the light curtain acquisition and control interface circuit is connected with the receiving and transmitting points of the light curtain;
the second high-speed CAN transceiver is connected with the first high-speed CAN transceiver;
light curtain collection control chip connects light curtain collection and control interface circuit and the high-speed CAN transceiver of second are used for passing through light curtain collection and control interface circuit carry out scanning control to light curtain transceiver point, and pass through light curtain collection and control interface circuit gather light curtain detected signal and carry out preliminary analysis, will detect the signal and pass through CAN communication mode and give when transform signal appears in preliminary analysis the further analysis processing is carried out to main control chip.
Preferably, the light curtain trailing detection circuit further comprises a 12V to 5V non-isolated DCDC power supply module for accessing a 12V external power supply and converting the power supply into various power supplies required by the light curtain trailing detection circuit;
the second high-speed CAN transceiver adopts TJA1050, the light curtain collection control chip adopts STM32F103R6T6, 62, 61 feet of the light curtain collection control chip are connected respectively via nineteenth resistance, twentieth resistance and are connected 1, 4 feet of the second high-speed CAN transceiver, 2, 3 feet of the second high-speed CAN transceiver connect earthing terminal, 5V output terminal of non-isolated DCDC power module, connect sixteenth electric capacity between 2, 3 feet of the second high-speed CAN transceiver, 1, 4 feet of the second high-speed CAN transceiver connect the 5V output terminal of non-isolated DCDC power module respectively via twenty-first resistance, twenty-second resistance, 8 feet of the second high-speed CAN transceiver connect earthing terminal of non-isolated DCDC power module, 6, 7 feet of the second high-speed CAN transceiver connect 6, 7 feet of the first high-speed CAN transceiver respectively, 6, 7 feet of the second high-speed CAN transceiver, And a twenty-third resistor is connected between the pins 7.
Preferably, the main control unit further comprises a crystal oscillator circuit and a watchdog circuit which are externally hung on the main control chip.
Preferably, the main control chip adopts AT91SAM7X256, the watchdog circuit includes a watchdog chip with model SP706S and a single-wire driver with model SN74LVC1G125, a 6-pin connection of the watchdog chip is connected with a 72-pin of the main control chip to output a dog feeding signal to the main control chip, a 7-pin connection of the watchdog chip is connected with a 2-pin of the single-wire driver, and a 4-pin connection of the single-wire driver is connected with a 57-pin of the main control chip to provide a reset signal to the main control chip.
Preferably, the circuit board is designed by adopting a four-layer circuit board, and the middle two layers are provided with circuits related to a power supply.
The industrial control board has the following beneficial effects:
on one hand, an IO isolation circuit is designed in each path of IO control to realize isolation; on the aspect of power supply, an external power supply is subjected to DCDC voltage transformation isolation, so that various power supplies are obtained, primary power supply isolation is realized, and DCDC voltage stabilization isolation is additionally performed for power supply of a communication interface, so that the power supply stability is maintained, and the secondary power supply isolation is realized; and in the third aspect, a communication isolation circuit is designed in each path of communication path to realize isolation. Therefore, the integrated circuit has the advantages of multi-aspect improvement, stable communication, high control reliability and excellent electrical isolation performance, ensures the feasibility of integrating all circuits on one circuit board, finally realizes high integration, high stability and high reliability, CAN be applied to industrial application equipment such as self-service gate machines, industrial logic control and self-service storage cabinets, and is applied to industrial application equipment relating to data communication such as RS232, RS485/422, CAN buses and high-speed digital IO.
Furthermore, when the control panel is applied to equipment needing infrared detection, such as a gate machine and the like, a light curtain trailing detection circuit CAN be integrated on the same circuit board, is only responsible for carrying out preliminary analysis on collected light curtain detection signals, and transfers the detection signals to the main control chip for further analysis and processing in a CAN communication mode when the conversion signals appear in the preliminary analysis, so that the main control chip is helped to share part of calculation pressure, and the reliable stability of data transmission CAN be enhanced through CAN bus communication;
furthermore, the invention can also adopt an independent crystal oscillator circuit and a watchdog circuit which are externally hung on the main control chip, can solve the problems of 'crash' or 'running away' of a program of the main control chip and the like, and ensure the normal operation and use of the whole control panel;
furthermore, the circuit board is designed by adopting a four-layer circuit board, and the middle two layers are provided with circuits related to a power supply, so that the electromagnetic compatibility is improved, the noise is reduced, and the anti-interference effect is better.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts:
FIG. 1 is a functional block diagram of an industrial-scale control panel of the present invention;
FIG. 2 is a circuit diagram of a crystal oscillator circuit in one embodiment;
FIG. 3 is a circuit diagram of a watchdog circuit in an exemplary embodiment;
FIG. 4 is a circuit diagram of a communication isolation circuit and a communication isolation power supply in one embodiment;
FIG. 5 is a circuit diagram of a main input isolated power supply in one embodiment;
fig. 6 is a circuit diagram of an opto-isolator circuit for the IO input port in an example embodiment;
FIG. 7 is a circuit diagram of a light curtain trailing detection circuit in one embodiment.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Exemplary embodiments of the invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
The terms including ordinal numbers such as "first", "second", and the like used in the present specification may be used to describe various components, but the components are not limited by the terms. These terms are used only for the purpose of distinguishing one constituent element from other constituent elements. For example, a first component may be termed a second component, and, similarly, a second component may be termed a first component, without departing from the scope of the present invention. The term "connected" or "connecting" as used herein includes not only the direct connection of two entities but also the indirect connection via other entities having beneficial and improving effects.
Referring to fig. 1, the general idea of the present invention is: an industrial control board is constructed, and comprises a main control unit, a plurality of paths of IO control interfaces and a plurality of paths of communication interfaces which are integrated on the same circuit board.
Wherein, the main control unit includes:
a main control chip;
the IO isolation circuits are connected between the main control chip and the corresponding IO control interfaces to realize IO isolation;
each path of communication isolation circuit is connected between the main control chip and the corresponding path of communication interface to realize communication isolation;
the main input isolation power supply is used for accessing an external power supply to carry out DCDC voltage transformation isolation so as to obtain various power supplies required by the control panel;
and each path of communication isolation power supply is connected between the main input isolation power supply and one path of corresponding communication interface and used for obtaining a required power supply from the main input isolation power supply to supply power to the corresponding path of communication interface after DCDC voltage stabilization isolation is carried out on the required power supply so as to realize power supply isolation of the communication interface.
The integrated circuit is improved from multiple aspects, stable communication is realized, the control reliability is high, the electrical isolation performance is excellent, the feasibility of integrating all circuits on one circuit board is ensured, and finally, the high integration level, the high stability and the high reliability are realized, so that the integrated circuit CAN be applied to industrial application equipment such as self-service gate machines, industrial logic control and self-service storage cabinets, and CAN be applied to industrial application equipment relating to data communication such as RS232, RS485/422, CAN buses and high-speed digital IO.
In order to better understand the technical solutions, the technical solutions will be described in detail below with reference to the drawings and the specific embodiments of the specification, and it should be understood that the embodiments and specific features of the embodiments of the present invention are detailed descriptions of the technical solutions of the present application, and are not limited to the technical solutions of the present application, and the technical features of the embodiments and examples of the present invention may be combined with each other without conflict.
Referring to fig. 2-7, a more detailed description of an industrial-scale control panel of a gate apparatus is provided below. The circuit on the circuit board includes a light curtain trailing detection circuit in addition to the main control unit, the multiple IO control interfaces, and the multiple communication interfaces shown in fig. 1. In order to integrate all circuits on one circuit board, the embodiment emphasizes improvement in the aspects of peripheral circuits of a main control chip, power isolation, communication isolation, IO isolation, optical curtain trailing detection and the like. The main control chip of this embodiment adopts AT91SAM7X256, and U1A, U1C, and U1D in fig. 2-7 respectively show only part of the pins of the main control chip.
Improvement of peripheral circuit of main control chip
In order to enhance the anti-interference performance of the main control chip to the environmental EMI and ensure the normal operation of the program, the embodiment provides a crystal oscillator circuit and a watchdog circuit which are externally hung on the main control chip.
Referring to fig. 2, the master control chip employs an external active crystal oscillator, and an output pin of the active crystal oscillator chip U12 is connected to a 97 pin of the master control chip through a resistor R22 to provide an 18.432MHz crystal oscillator signal.
Referring to fig. 3, the embodiment also provides a reset signal through an external independent hardware circuit, specifically, the watchdog circuit includes a watchdog chip U23 whose model is SP706S and a single-wire driver U24 whose model is SN74LVC1G125, the 6-pin connection of the watchdog chip U23 and the 72-pin connection of the main control chip output a feeding signal to the main control chip, the 6-pin of the watchdog chip U23 is further connected to the chip power VCC through a resistor R61, the 7-pin of the watchdog chip U23 is connected to the VCC through a resistor R78, the 7-pin of the watchdog chip U23 is connected to the ground of the power VCC through capacitors C18 and C19 connected in parallel, the 7-pin of the watchdog chip U23 is connected to the 2-pin of the single-wire driver U24, the 1-pin of the watchdog chip is connected to the chip power VCC through a resistor R60, the 1-pin of the watchdog chip is connected to the ground of the power VCC through a capacitor C16C 35, the SW 16 is connected to the switch SW1 of the watchdog chip in parallel, and the watchdog chip is connected to the ground of the switch SW1, The ground of 1, 3 foot ground connection power VCC of 4 feet and single wire driver U24, the 4 feet of single wire driver U24 are connected the 57 feet of main control chip give in order to provide reset signal the main control chip, the 5 feet ground connection power VCC of single wire driver U24, the 5 feet of single wire driver U24 still connect the ground of power VCC through electric capacity C49.
Design independent crystal oscillator circuit and watchdog circuit in this embodiment, can solve main control chip "crash" or program "run away" scheduling problem, ensure that whole control panel normal operating uses.
(II) communication isolation
Referring to fig. 4, the multiplex communication interface of the present embodiment includes: a first high-speed CAN transceiver U4, a high-speed low-power RS232 chip U2 and a full-duplex RS485/422 chip U8.
Correspondingly, the multipath communication isolation circuit comprises:
the first digital isolator U3 is connected between a main control chip and the first high-speed CAN transceiver U4;
the second digital isolator U10 is connected between the main control chip and the high-speed low-power RS232 chip U2;
and the third digital isolator U7 is connected between the main control chip and the full-duplex RS485/422 chip.
Specifically, the first digital isolator U3, the second digital isolator U10, and the third digital isolator U7 all employ ADUM1201, the first high-speed CAN transceiver U4 employs TJA1050, the high-speed low-power-consumption RS232 chip U2 employs SP3232, and the full-duplex RS485/422 chip U8 employs MAX488 ESA.
A third resistor R7 is connected between pins 6 and 7 of the first high-speed CAN transceiver U4, a pin 8 of the first high-speed CAN transceiver U4 is connected with a pin 2, pins 2 and 3 of the first high-speed CAN transceiver U4 are connected with pins 5 and 8 of the first digital isolator U3, pins 1 and 4 of the first high-speed CAN transceiver U4 are connected with pins 6 and 7 of the first digital isolator U3, a second capacitor C15 is connected between pins 1 and 4 of the first digital isolator U3, and pins 2 and 3 of the first digital isolator U3 are connected with pins 46 and 47 of a main control chip through a fourth resistor R29 and a fifth resistor R21, respectively.
A fourth capacitor C34 is connected between pins 1 and 3 of the high-speed low-power-consumption RS232 chip U2, a fifth capacitor C28 is connected between pins 2 and 15 of the high-speed low-power-consumption RS232 chip U2, a sixth capacitor C31 is connected between pins 4 and 5 of the high-speed low-power-consumption RS232 chip U2, a seventh capacitor C32 is connected between pins 6 and 15 of the high-speed low-power-consumption RS232 chip U2, an eighth capacitor C25 is connected between pins 15 and 16 of the high-speed low-power-consumption RS232 chip U2, pins 15 and 16 of the high-speed low-power-consumption RS232 chip U2 are connected with pins 5 and 8 of the second digital isolator U10, pins 10 and 9 of the high-speed low-power-consumption RS232 chip U2 are connected with pins 6 and 7 of the second digital isolator U10, a ninth capacitor C23 is connected between pins 1 and 4 of the second digital isolator U10, and eighth resistor R19 and pins 2 and 3 of the second digital isolator U10 are connected with pins 4 through a resistor R19 respectively, The ninth resistor R18 is connected with pins 89 and 90 of the main control chip;
pins 1, 2, 3 and 4 of the full-duplex RS485/422 chip U8 are respectively connected with pins 8, 7, 6 and 5 of a third digital isolator U7, and pins 2 and 3 of the third digital isolator U7 are respectively connected with pins 81 and 82 of a main control chip through a twelfth resistor R42 and a thirteenth resistor R155.
In order to facilitate connection with an external device, the multi-channel communication interface needs to provide a specific mechanical interface, and for this purpose, the multi-channel communication interface of this embodiment further includes: the device comprises a first interface used for being in butt joint with an external CAN interface, a second interface used for being in butt joint with an external RS232 interface, and a third interface used for being in butt joint with an external RS485/422 interface. The first interface comprises three pins respectively connected with pins 7, 6 and 2 of the first high-speed CAN transceiver U4, the second interface comprises three pins respectively connected with pins 8, 7 and 15 of the high-speed low-power-consumption RS232 chip U2, the third interface comprises pins A _485, B _485, Z _485, Y _485 and G _485, fourteen resistors R34 are connected between the pins A _485 and B _485, the pins A _485, B _485 and G _485 are respectively connected with pins 8, 7 and 4 of the full-duplex RS485/422 chip U8, and the pins Z _485 and Y _485 are respectively connected with pins 6 and 5 of the full-duplex RS485/422 chip U8 through a pentadecaresistor R33 and a hexadecimar 32. In this embodiment, the first interface and the second interface are integrated into one interface P12.
(III) Power isolation
Referring to fig. 4, the main input isolated power supply includes a first isolated DCDC power supply module DC0 converting 12V to 5V and an external power interface P23 accessing 12V external power. The first isolated DCDC power module DC0 adopts HDW5-12S 05. The first isolated DCDC power supply module DC0 not only can step down the input 12V power supply to 5V, but also is an isolated power supply chip, and can well ensure the isolation of the input and output power supplies.
An eleventh capacitor C4 is connected between a power source positive pin (i.e., pin 1) and a power source negative pin (i.e., pin 2) of the external power interface P23, pin 1 of the first isolated DCDC power module DC0 is connected to a power source negative pin of the external power interface P23, pin 2 of the first isolated DCDC power module DC0 is connected to the power source positive pin of the external power interface P23 via a fuse F0, a twelfth capacitor C6 and a fourth electrolytic capacitor C2 are connected in parallel to each other between pins 3 and 4 of the first isolated DCDC power module DC0, a fourth light emitting diode D1 and a seventeenth resistor R31 are connected in series between pins 3 and 4 of the first isolated DCDC power module DC0, a thirteenth capacitor C5, a fifth electrolytic capacitor C1, a zener diode D27 are connected in parallel to each other between pins 1 and 2 of the first isolated DCDC power module DC0, and a thirteenth capacitor C5, a fifth electrolytic capacitor C1, a zener diode D27 is connected in parallel to each other between pins 1 of the first isolated DCDC power module DC0, The pin 2 is also connected with a fifth light emitting diode D0 and an eighteenth resistor R30 which are connected in series.
Furthermore, because a plurality of chips on the circuit board also need a chip power supply VCC, the main input isolation power supply also comprises a non-isolation type DCDC power supply chip U9, the U9 adopts LTC1117-3.3V, which is a 5V power supply output from the first isolation type DCDC power supply module DC0 to obtain a power supply input, and the chip power supply VCC of 3.3V is obtained after DCDC voltage reduction processing.
With continued reference to fig. 4, the isolated power supply for multipath communication of the present invention specifically includes the following three: the second isolated DCDC power supply module DC1 for converting 5V into 5V is connected with the power supply end of the first high-speed CAN transceiver U4; the third isolated DCDC power supply module DC5 for converting 5V into 5V is connected with the power supply end of the high-speed low-power RS232 chip U2; and the fourth isolated DCDC power supply module DC3 for converting 5V into 5V is connected with the power supply end of the U8 of the full-duplex RS485/422 chip. In this embodiment, the second isolated DCDC power module DC1, the third isolated DCDC power module DC5, and the fourth isolated DCDC power module DC3 all adopt B0505S-1WR 2.
(IV) IO isolation
The multi-channel IO isolation circuit in this embodiment includes an input port connected to the IO control interface and an optical coupling isolation circuit between the main control chips, and a digital isolation circuit connected to an output port of the IO control interface and between the main control chips. For example, fig. 6 only illustrates the optical coupling isolation circuit of the four-way IO input port, specifically, a four-channel transistor output photocoupler U14, model number of which is PS2801-4, is used. The output port section may employ a standard digital isolator such as ADUM 1401.
(V) light curtain trailing detection
Also called PEBeam, is a channel infrared ray correlation (wavelength: 940nm) array light curtain detection device. Referring to fig. 7, the light curtain trailing detection circuit includes: the non-isolated DCDC power supply module is used for accessing a 12V external power supply and converting the external power supply into various power supplies required by the light curtain trailing detection circuit; the light curtain collecting and controlling interface circuit is connected with a receiving and sending point of the light curtain, the second high-speed CAN transceiver U36 is connected with the first high-speed CAN transceiver U4, and the light curtain collecting and controlling interface circuit is connected with a light curtain collecting and controlling chip U30 of the second high-speed CAN transceiver U36.
For example, 12V external power is switched to 5V power and 5V power is switched to 3.3V power, such as 12V to 5V with BD9703 and 5V to 3.3V with AMS 1117-3.3. The channel is generally divided into an upper light curtain and a lower light curtain, the height of the two light curtains is 50-70 mm, the upper light curtain is 16 pairs of receiving and sending points, and the lower light curtain is 20 pairs of receiving and sending points. In this embodiment, the second high-speed CAN transceiver U36 uses TJA 1050.
Light curtain collection control chip U30 is used for through light curtain collection and control interface circuit carry out scanning control to light curtain receiving and dispatching point, and pass through light curtain collection and control interface circuit gather light curtain detected signal and carry out preliminary analysis, with detected signal pass through CAN communication mode when transform signal appears in preliminary analysis and give main control chip carries out further analysis processes, for example distinguishes people and luggage.
In this embodiment, the light curtain collection control chip U30 adopts STM32F103R6T6, pins 62 and 61 of the light curtain collection control chip U30 are connected to pins 1 and 4 of the second high-speed CAN transceiver U36 through a nineteenth resistor R217 and a twentieth resistor R218, respectively, pins 2 and 3 of the second high-speed CAN transceiver U36 are connected to a ground terminal and a 5V output terminal of a non-isolated DCDC power supply module, a sixteenth capacitor C132 is connected between pins 2 and 3 of the second high-speed CAN transceiver U36, pins 1 and 4 of the second high-speed CAN transceiver U36 are connected to a 5V output terminal of the non-isolated DCDC power supply module through a twenty-first resistor R176 and a twenty-second resistor R177, a pin 8 of the second high-speed CAN transceiver U36 is connected to a ground terminal of the non-isolated DCDC power supply module, pins 6 and 7 of the second high-speed transceiver U36 are connected to pins 6 and 7 of the first high-speed CAN transceiver U4, and a twenty-third resistor R205 is connected between pins 6 and 7 of the second high-speed CAN transceiver U36. Since data is transmitted through the CAN bus between the AT91SAM7X256(U1) and the STM32F103R6T6(U30), the reliable stability of data transmission is enhanced.
The light curtain acquisition control chip U30 assists the main control chip to share part of the calculated pressure, and the CAN bus communication CAN also enhance the reliability and stability of data transmission.
(VI) other improvements
In the embodiment, the circuit board is designed by adopting a four-layer circuit board, and the middle two layers of circuits related to the power supply improve the electromagnetic compatibility, reduce the noise and have better anti-interference effect.
In conclusion, the invention is improved from multiple aspects, ensures stable communication, high control reliability and excellent electrical isolation performance, ensures the feasibility of integrating all circuits on one circuit board, finally realizes high integration, high stability and high reliability, CAN be applied to industrial application equipment such as self-service pass gates, industrial logic control, self-service storage cabinets and the like, and is applied to industrial application equipment relating to data communication such as RS232, RS485/422, CAN buses, high-speed digital IO and the like.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. The utility model provides an industrial control board which characterized in that, includes main control unit, multichannel IO control interface, the multichannel communication interface of integration on same piece circuit board, wherein, main control unit includes:
a main control chip;
the IO isolation circuits are connected between the main control chip and the corresponding IO control interfaces to realize IO isolation;
each path of communication isolation circuit is connected between the main control chip and the corresponding path of communication interface to realize communication isolation;
the main input isolation power supply is used for accessing an external power supply to carry out DCDC voltage transformation isolation to obtain various power supplies required by the control panel;
and each path of communication isolation power supply is connected between the main input isolation power supply and one path of corresponding communication interface and used for obtaining a required power supply from the main input isolation power supply to supply power to the corresponding path of communication interface after DCDC voltage stabilization isolation is carried out on the required power supply so as to realize power supply isolation of the communication interface.
2. The industrial scale control board of claim 1, wherein the multi-way IO isolation circuit comprises an opto-coupler isolation circuit connected between an input port in the IO control interface and the main control chip, and a digital isolation circuit connected between an output port in the IO control interface and the main control chip.
3. The industrial-scale control board of claim 1, wherein the multipath communication interface comprises a first high-speed CAN transceiver, a high-speed low-power RS232 chip, and a full-duplex RS485/422 chip, and the multipath communication isolation circuit comprises:
the first digital isolator is connected between the main control chip and the first high-speed CAN transceiver;
the second digital isolator is connected between the main control chip and the high-speed low-power-consumption RS232 chip;
and the third digital isolator is connected between the main control chip and the full-duplex RS485/422 chip.
4. The industrial scale control panel of claim 3, wherein the main input isolated power supply comprises a first isolated DCDC power supply module that transitions from 12V to 5V;
the multiplex communication isolated power supply comprises:
the second isolated DCDC power supply module is used for converting 5V into 5V and is connected with the power supply end of the first high-speed CAN transceiver;
the third isolated DCDC power supply module is used for converting 5V into 5V and is connected with the power supply end of the high-speed low-power-consumption RS232 chip;
and the fourth isolated DCDC power supply module for converting 5V into 5V is connected with the power supply end of the full-duplex RS485/422 chip.
5. The industrial-scale control board of claim 4, wherein the main control chip adopts AT91SAM7X256, the first high-speed CAN transceiver adopts TJA1050, the high-speed low-power RS232 chip adopts SP3232, the full-duplex RS485/422 chip adopts MAX488ESA, the first digital isolator, the second digital isolator and the third digital isolator all adopt ADUM1201, the first isolated DCDC power module adopts HDW5-12S05, and the second isolated DCDC power module, the third isolated DCDC power module and the fourth isolated DCDC power module all adopt B0505S-1WR 2;
pins 1 and 2 of the second isolated DCDC power supply module are connected with pins 5 and 3 of the first isolated DCDC power supply module, a first capacitor, a first electrolytic capacitor and a first resistor which are connected in parallel are connected between pins 3 and 4 of the second isolated DCDC power supply module, a first light-emitting diode and a second resistor which are connected in series are further connected between pins 3 and 4 of the second isolated DCDC power supply module, pins 3 and 4 of the second isolated DCDC power supply module are connected with pins 2 and 3 of the first high-speed CAN transceiver, a third resistor is connected between pins 6 and 7 of the first high-speed CAN transceiver, pin 8 of the first high-speed CAN transceiver is connected with pin 2, pins 2 and 3 of the first high-speed CAN transceiver are connected with pins 5 and 8 of the first digital isolator, and pins 1 and 4 of the first high-speed CAN transceiver are connected with pins 6 and 8 of the first digital isolator, Pins 7, wherein a second capacitor is connected between pins 1 and 4 of the first digital isolator, and pins 2 and 3 of the first digital isolator are connected with pins 46 and 47 of the main control chip through a fourth resistor and a fifth resistor respectively;
pins 1 and 2 of the third isolated DCDC power module are connected with pins 5 and 3 of the first isolated DCDC power module, pins 3 and 4 of the third isolated DCDC power module are connected with a third capacitor, a second electrolytic capacitor and a sixth resistor which are connected in parallel, pins 3 and 4 of the third isolated DCDC power module are also connected with a second light-emitting diode and a seventh resistor which are connected in series, pins 3 and 4 of the third isolated DCDC power module are connected with pins 15 and 16 of the high-speed low-power-consumption RS232 chip, pins 1 and 3 of the high-speed low-power-consumption RS232 chip are connected with a fourth capacitor, pins 2 and 15 of the high-speed low-power-consumption RS232 chip are connected with a fifth capacitor, pins 4 and 5 of the high-speed low-power-consumption RS232 chip are connected with a sixth capacitor, pins 6 and 15 of the high-speed low-power-consumption RS232 chip are connected with a seventh capacitor, pins 15 and 15 of the high-speed low-power-consumption RS232 chip, An eighth capacitor is connected between pins 16, pins 15 and 16 of the high-speed low-power-consumption RS232 chip are connected with pins 5 and 8 of the second digital isolator, pins 10 and 9 of the high-speed low-power-consumption RS232 chip are connected with pins 6 and 7 of the second digital isolator, a ninth capacitor is connected between pins 1 and 4 of the second digital isolator, and pins 2 and 3 of the second digital isolator are connected with pins 89 and 90 of the main control chip through an eighth resistor and a ninth resistor respectively;
pins 1 and 2 of the fourth isolated DCDC power supply module are connected with pins 5 and 3 of the first isolated DCDC power supply module, a tenth capacitor, a third electrolytic capacitor and a tenth resistor which are connected in parallel are connected between pins 3 and 4 of the fourth isolated DCDC power supply module, a third light emitting diode and an eleventh resistor which are connected in series are further connected between pins 3 and 4 of the fourth isolated DCDC power supply module, pins 3 and 4 of the fourth isolated DCDC power supply module are connected with pins 4 and 1 of the full-duplex RS485/422 chip, pins 1, 2, 3 and 4 of the full-duplex RS485/422 chip are respectively connected with pins 8, 7, 6 and 5 of a third digital isolator, and pins 2 and 3 of the third digital isolator are respectively connected with pins 81 and 82 of a main control chip through a twelfth resistor and a thirteenth resistor.
6. The industrial-scale control board according to claim 5, wherein the main input isolated power supply further comprises an external power supply interface, an eleventh capacitor is connected between a positive power supply pin and a negative power supply pin of the external power supply interface, pin 1 of the first isolated DCDC power supply module is connected with a negative power supply pin of the external power supply interface, pin 2 of the first isolated DCDC power supply module is connected with the positive power supply pin of the external power supply interface via a fuse, a twelfth capacitor and a fourth electrolytic capacitor are connected in parallel between pins 3 and 4 of the first isolated DCDC power supply module, a fourth light emitting diode and a seventeenth resistor are connected in series between pins 3 and 4 of the first isolated DCDC power supply module, and a thirteenth capacitor, a seventh resistor, and a resistor are connected in parallel between pins 1 and 2 of the first isolated DCDC power supply module, And a fifth light-emitting diode and an eighteenth resistor which are connected in series are further connected between pins 1 and 2 of the first isolated DCDC power supply module.
7. The industrial-scale control panel of claim 5, further comprising a light curtain trailing detection circuit integrated on the circuit board, the light curtain trailing detection circuit comprising:
the light curtain acquisition and control interface circuit is connected with the receiving and transmitting points of the light curtain;
the second high-speed CAN transceiver is connected with the first high-speed CAN transceiver;
light curtain collection control chip connects light curtain collection and control interface circuit and the high-speed CAN transceiver of second are used for passing through light curtain collection and control interface circuit carry out scanning control to light curtain transceiver point, and pass through light curtain collection and control interface circuit gather light curtain detected signal and carry out preliminary analysis, will detect the signal and pass through CAN communication mode and give when transform signal appears in preliminary analysis the further analysis processing is carried out to main control chip.
8. The industrial control panel of claim 7, further comprising a 12V to 5V non-isolated DCDC power supply module for accessing 12V external power and converting it to various power supplies required by the light curtain trailing detection circuit;
the second high-speed CAN transceiver adopts TJA1050, the light curtain collection control chip adopts STM32F103R6T6, 62, 61 feet of the light curtain collection control chip are connected respectively via nineteenth resistance, twentieth resistance and are connected 1, 4 feet of the second high-speed CAN transceiver, 2, 3 feet of the second high-speed CAN transceiver connect earthing terminal, 5V output terminal of non-isolated DCDC power module, connect sixteenth electric capacity between 2, 3 feet of the second high-speed CAN transceiver, 1, 4 feet of the second high-speed CAN transceiver connect the 5V output terminal of non-isolated DCDC power module respectively via twenty-first resistance, twenty-second resistance, 8 feet of the second high-speed CAN transceiver connect earthing terminal of non-isolated DCDC power module, 6, 7 feet of the second high-speed CAN transceiver connect 6, 7 feet of the first high-speed CAN transceiver respectively, 6, 7 feet of the second high-speed CAN transceiver, And a twenty-third resistor is connected between the pins 7.
9. The industrial control board of claim 1, wherein the master control unit further comprises a crystal oscillator circuit and a watchdog circuit externally hung on the master control chip.
10. The board of claim 9, wherein the master control chip is an AT91SAM7X256, the watchdog circuit comprises a watchdog chip of model SP706S and a single wire driver of model SN74LVC1G125, a 6-pin connection of the watchdog chip is connected to a 72-pin connection of the master control chip to output a dog-feed signal to the master control chip, a 7-pin connection of the watchdog chip is connected to a 2-pin connection of the single wire driver, and a 4-pin connection of the single wire driver is connected to a 57-pin connection of the master control chip to provide a reset signal to the master control chip.
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| US6515483B1 (en) * | 2000-08-30 | 2003-02-04 | Micron Technology, Inc. | System for partial scan testing of integrated circuits |
| CN101030711B (en) * | 2007-03-15 | 2011-11-30 | 中国船舶重工集团公司第七一二研究所 | Microcomputer protecting controller |
| CN201549864U (en) * | 2009-10-23 | 2010-08-11 | 南京因泰莱配电自动化设备有限公司 | Intelligent recloser |
| CN201812317U (en) * | 2010-07-02 | 2011-04-27 | 上海铁路通信工厂 | Locomotive integrated wireless communication recording system |
| CN202533756U (en) * | 2011-09-28 | 2012-11-14 | 常州新德冷机有限公司 | Universal intelligent control panel |
| CN104569804B (en) * | 2015-01-29 | 2017-11-17 | 国家电网公司 | A kind of breaker operation cabinet self-adapting closed loop automatic detecting platform |
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| CN108549277A (en) * | 2018-03-16 | 2018-09-18 | 浙江菲达环保科技股份有限公司 | A kind of multiclass power supply smart control system for electric precipitator |
| CN109473965A (en) * | 2018-11-20 | 2019-03-15 | 北京交通大学 | A kind of direct-flow distribution system characteristic polymerization scheduler and polymerization dispatching method |
| CN210038513U (en) * | 2019-08-20 | 2020-02-07 | 青岛中加特变频电机有限公司 | Mining intrinsically safe switching value IO circuit |
| CN111682772B (en) * | 2020-04-02 | 2023-06-30 | 上海航天控制技术研究所 | Multi-output switching power supply device of high-voltage servo controller |
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Effective date of registration: 20221201 Address after: No.99, Meicun Road, Futian District, Shenzhen, Guangdong 518049 Patentee after: INTERNATIONAL SECURITY TECHNOLOGY (SHENZHEN) Ltd. Patentee after: SHENZHEN HUAZHENGLIAN INDUSTRIAL Co.,Ltd. Patentee after: INTERNATIONAL SECURITY TECHNOLOGY Ltd. Address before: No.99, Meicun Road, Futian District, Shenzhen, Guangdong 518049 Patentee before: INTERNATIONAL SECURITY TECHNOLOGY (SHENZHEN) Ltd. |