CN209976308U

CN209976308U - High-safety door machine safety chain control system

Info

Publication number: CN209976308U
Application number: CN201920245312.7U
Authority: CN
Inventors: 邵文英
Original assignee: Yiteng Technology (wuxi) Co Ltd
Current assignee: Yiteng Technology (wuxi) Co Ltd
Priority date: 2019-02-26
Filing date: 2019-02-26
Publication date: 2020-01-21
Anticipated expiration: 2029-02-26

Abstract

The utility model discloses a door machine safety chain control system of high security, relate to the door machine field, in this door machine safety chain control system, utilize the opto-coupler to carry out circuit control and signal isolation between control circuit and the drive circuit, better control characteristic has, form safety chain structure simultaneously between control circuit and drive circuit, second main control chip in first main control chip among the control circuit and the drive circuit can all turn-off driving motor through safety chain structure, the door machine safety chain control system of this application disclosure provides multiple safety protection for the operation of door machine system, can easily deal with various proruption abnormal conditions, in time stop driving motor's operation, thereby reach the mesh of safety and protection, the security of whole door machine system has been improved.

Description

High-safety door machine safety chain control system

Technical Field

The utility model belongs to the technical field of the door machine and specifically relates to a door machine safety chain control system of high security.

Background

The door machine system is used for driving the lifting of the door body, so that the door machine system is convenient to use, is widely applied to various fields, and is a common rolling door machine system, a garage door machine system, an industrial door machine system and the like at present according to different application scenes and types of the driven door body. No matter in which kind of door machine system, it mainly all includes control circuit, drive circuit and driving motor triplex, and the user can utilize the button that control circuit provided to carry out each item operation, and control circuit connects drive circuit, sends control instruction to drive circuit according to user's operation, and drive circuit connects driving motor and according to control instruction control driving motor's action, and thereby driving motor drives the lift of the door body and opens and stop. However, various emergency situations can occur in the door machine system in the operation process, for example, the wiring of the whole system is complex, the situation of electric leakage or poor contact can occur after long-time use, for example, the situation of overload or short circuit can occur in the operation of the driving motor, for example, the situation that people or objects pass below the door body can occur in the descending process of the door body, various emergency situations can occur in the operation process of the door machine system to cause the abnormal operation of the whole system, corresponding countermeasures are not provided in the existing door machine system, so that even if an emergency situation occurs, the door machine system can continue to operate, the damage of the whole door machine system can be caused, even the door body drops rapidly due to the sudden failure of the driving motor to cause accidents, and the life and property safety can be affected, so that the existing door machine system has great potential safety hazards.

SUMMERY OF THE UTILITY MODEL

The invention provides a high-safety door machine safety chain control system aiming at the problems and the technical requirements, and the door machine safety chain control system can be stopped in time when various emergency situations occur in the door machine operation process, so that the aims of safety and protection are fulfilled.

The technical scheme of the utility model as follows:

a high security door machine safety chain control system, the door machine safety chain control system comprising: a control circuit, a drive circuit and a drive motor;

the output end of a first main control chip in the control circuit is connected with the cathode input end of a first optical coupler, the anode input end of the first optical coupler is connected with a power supply, the collector output end is connected with the power supply input end of the control circuit, the emitter output end is respectively connected with the anode input end of a second optical coupler and the output end of the control circuit, the cathode input end of the second optical coupler is connected with an analog ground, the collector output end is connected with one input end of the first main control chip, and the emitter output end is connected with the analog ground; the input end of the control circuit is connected with the anode input end of the third optocoupler, the cathode input end and the emitter output end of the third optocoupler are respectively connected with the analog ground, and the collector output end is connected with the other input end of the first main control chip;

the output end of a second main control chip in the driving circuit is connected with one input end of an AND gate, the other input end of the AND gate is connected with the output end of an emitter of a fourth optocoupler, the output end of the emitter of the fourth optocoupler is also connected with the input end of the second main control chip, the output end of the emitter of the fourth optocoupler is also connected with an output ground through a pull-down resistor, the output end of a collector of the fourth optocoupler is connected with a power supply, the input end of an anode is connected with the input end of the driving circuit, and; the output end of the AND gate is connected with the enabling end of a motor driving chip in the driving circuit; the input end of a switch power supply in the drive circuit is connected with a mains supply, the output end of the switch power supply supplies power for the drive circuit, and the output end of the switch power supply is also connected with the power output end of the drive circuit;

the input end of the control circuit is connected with the output end of the drive circuit, the output end of the control circuit is connected with the input end of the drive circuit, and the power supply output end of the drive circuit is connected with the power supply input end of the control circuit and supplies power to the control circuit; and a motor driving chip in the driving circuit is connected with and drives the driving motor.

The gate machine safety chain control system further comprises a non-contact operation safety switch, the operation safety switch is connected to the driving circuit, an anode input end of a fourth optocoupler is connected with an input end of the driving circuit through a fifth optocoupler, an anode input end of the fourth optocoupler is connected with an emitter output end of the fifth optocoupler, and a collector output end of the fifth optocoupler is connected with an input end of the driving circuit; the cathode input end of the fifth optocoupler is connected with the analog ground, and the anode input end of the fifth optocoupler is connected to the power supply through the operation safety switch.

The technical scheme is that the door machine safety chain control system further comprises a non-contact operation safety switch, the operation safety switch is connected to the control circuit, and the output end of the emitting electrode of the first optical coupler is connected with the input end of the anode of the second optical coupler and the output end of the control circuit through the operation safety switch.

The technical scheme is that the operation safety switch comprises but is not limited to a motor temperature control switch, an infrared switch and a proximity switch, the motor temperature control switch is arranged in the driving motor, the transmitting end and the receiving end of the infrared switch are oppositely arranged on two sides of a door body driven by the driving motor, and the proximity switch is arranged at a motor rotating shaft of the driving motor and is just opposite to a hand crank inserted into the motor rotating shaft of the driving motor.

The technical scheme is that the control circuit is arranged in a door machine controller, the drive circuit is arranged in a door machine driver, the control circuit and the drive circuit are connected through a signal transmission line, the door machine controller further comprises a main power switch, and the input end of a switching power supply in the drive circuit is connected to a mains supply through the main power switch.

The further technical scheme is that the model of the first main control chip is LPC1767, the model of the second main control chip is TMS320F28027F, and the model of the motor driving chip is IRS 23364.

The utility model has the beneficial technical effects that:

the application discloses door machine safety chain control system of high security, in this door machine safety chain control system, utilize the opto-coupler to carry out circuit control and signal isolation between control circuit and the drive circuit, better control characteristic has, form the safety chain structure simultaneously between control circuit and drive circuit, first main control chip in the control circuit and second main control chip in the drive circuit can all turn off driving motor through the safety chain structure, thereby reach the purpose of safety and protection. Meanwhile, the control circuit and the driving circuit can be externally connected with a non-contact operation safety switch for protection, so that the control circuit and the driving circuit have great flexibility and expandability, and the operation safety switch connected into the safety chain structure can also be used for switching off the driving motor by using the safety chain structure under the emergency condition through non-contact state switching. At external operation safety switch part, creatively set up proximity switch in drive motor inserts crank department, can effectively avoid the user to come the produced danger of electric call suddenly when inserting the crank and carrying out the manual switch door body. Simultaneously, the structure that this application is disclosed has still improved the power supply structure in original door machine system, adds main power switch in door machine controller, and the convenience is in user's key outage when emergency, guarantee safety. The utility model discloses a door machine safety chain control system provides multiple safety protection for the operation of door machine system, can easily deal with various unexpected abnormal conditions, in time stops drive motor's work to reach the mesh of safety and protection.

Drawings

Fig. 1 is a circuit diagram of a control circuit in a door machine safety chain control system disclosed in the present application.

Fig. 2 is a circuit diagram of a drive circuit in the door machine safety chain control system disclosed in the present application.

Fig. 3 is a schematic diagram of power supply between the control circuit and the driving circuit in the present application.

Fig. 4 is a configuration diagram of the proximity switch in the present application.

Fig. 5 is a connection circuit diagram of the control circuit and the drive circuit in the present application.

Detailed Description

The following describes the embodiments of the present invention with reference to the accompanying drawings.

The application discloses door machine safety chain control system of high security, this door machine safety chain control system includes: control circuit, drive circuit and driving motor, overall structure is: control circuit connects drive circuit, and drive circuit connects driving motor, and driving motor drives the door body motion such as rolling door, garage door and industrial door according to the in-service use needs, and is specific:

referring to fig. 1, a core of the control circuit is a first master chip IC1, and a model of the first master chip IC1 in the present application is LPC 1767. The output end of the first main control chip IC1 is connected with the cathode input end of the first optical coupler OK1, the pin 33 of the first main control chip IC1 is connected with the cathode input end of the first optical coupler OK1, the anode input end of the first optical coupler OK1 is connected with a power supply, and the power supply is +3.3V power supply in the application. The collector output end of the first optical coupler OK1 is connected with a power input end VCC of the control circuit, and the emitter output end is respectively connected with the anode input end of the second optical coupler OK2 and the output end Vout of the control circuit. The cathode input end and the emitter output end of the second optical coupler OK2 are both connected with analog ground AGND, the collector output end is connected with one input end of the first main control chip IC1, and in the present application, the cathode input end and the emitter output end are connected with pin 89 of the first main control chip IC 1. An input end Vin of the control circuit is connected with an anode input end of the third optical coupler OK3, a cathode input end and an emitter output end of the third optical coupler OK3 are respectively connected with an analog ground AGND, a collector output end is connected with the other input end of the first main control chip IC1, and in the application, the input end Vin is connected with a pin 87 of the first main control chip IC 1. The models of the first optical coupler OK1, the second optical coupler OK2 and the third optical coupler OK3 in the application are all TLP 283-4. It should be noted that, in practical implementation, conventional components such as resistors are usually connected between the circuit components, as shown in fig. 1, which is not described in detail in this application, and include magnetic beads L1 and L2 in addition to resistors R1-R4 with appropriate resistance values, which is in this application, and is in the model of BLM18AG 601. When the normal operation, the output end of the first main control chip IC1 outputs a low level, and when an abnormal condition, such as motor stalling or abnormal encoder communication, is detected, the output end of the first main control chip IC1 outputs a high level.

Referring to fig. 2, the core components of the driving circuit are a second master control chip IC2 and a motor driving chip IC3, in which the model of the second master control chip IC2 is TMS320F28027F and the model of the motor driving chip IC3 is IRS 23364. The output terminal of the second master chip IC2 is connected to one input terminal of the and gate G1, and in this application, the pin 24 of the second master chip IC2 is connected as its output terminal to the and gate G1. The other input end of the and gate G1 is connected to the emitter output end of the fourth optical coupler OK4, the output end of the and gate G1 is connected to the enable end EN of a motor driving chip IC3 in the driving circuit, when the gate driver is connected to drive a driving motor in the system, the motor driving chip IC3 in the driving circuit is used for connecting and driving the driving motor in the system, a person skilled in the art can design the connection relationship between the motor driving chip IC3 and the driving motor according to the chip principle of the motor driving chip IC3, and the application does not describe in detail, and the model number of the fourth optical coupler OK4 is LTV 816S. The emitter output end of the fourth optical coupler OK4 is also connected to the input end of the second main control chip IC2, which is connected to the 5-pin of the second main control chip IC2 in this application. The emitter output end of the fourth optical coupler OK4 is also connected with the output ground GND through a pull-down resistor R6, and the collector output end of the fourth optical coupler OK4 is connected with a power supply, wherein the power supply is a +3.3V power supply. An anode input end of the fourth optical coupler OK4 is connected with an input end Vin of the driving circuit, and a cathode input end is connected with an output end Vout of the driving circuit. The driving circuit further comprises a switching power supply for voltage conversion, the switching power supply is not shown in the figure, the input end of the switching power supply is connected with a mains supply, the output end of the switching power supply supplies power for the driving circuit, 220V voltage provided by the mains supply is converted into voltage required by the driving circuit and supplied with power, the voltage comprises +12V voltage and +3.3V voltage which are provided according to actual conditions, and meanwhile the output end of the switching power supply is further connected with a power output end VCC of the driving circuit. Similarly, various conventional components, including but not limited to resistors, capacitors, diodes, and magnetic beads, are also included in the driving circuit, and refer to fig. 2 specifically, which is not described in detail in this application. When the controller normally operates, the output end of the second main control chip IC2 outputs a high level, and when abnormal conditions, such as overvoltage, overcurrent, motor stalling and encoder communication abnormality, are detected, the output end of the second main control chip IC2 outputs a low level.

The power output VCC of the driving circuit is connected with the power input VCC of the control circuit, and the +12V voltage provided by the switch power supply can be output to the control circuit, so that the control circuit is powered, and the +12V voltage and the +3.3V voltage are supplied according to actual conditions. The input end Vin of the control circuit is connected with the output end Vout of the drive circuit, and the output end Vout of the control circuit is connected with the input end Vin of the drive circuit. In practical implementation, the control circuit and the driving circuit may be designed on the same circuit board, or may be designed on different circuit boards, and it is a common practice to design the control circuit on one circuit board to be a control board, and design the driving circuit on another circuit board to be a driving board, in this case, the connection between the control circuit and the driving circuit actually adopts an external wiring structure, and the control circuit and the driving circuit are connected through a signal transmission line, so as to facilitate the connection between the control circuit and the driving circuit, a connector is usually used to connect each output terminal in the circuit, for example, in the present application, besides the terminals for providing the input, output and power supply, a plurality of communication terminals for two circuits to perform RS485 communication are usually provided in the control circuit and the driving circuit, a 10 pin connector is used in the control circuit and in the driver circuit, respectively, as shown in fig. 1 and 2. Referring to fig. 1, a 1 st pin of a connector in the control circuit is connected to an analog ground AGND, a 2 nd pin is connected to a power input terminal VCC of the control circuit, a 7 th pin is connected to an output terminal Vout of the control circuit, an 8 th pin is connected to an input terminal Vin of the control circuit, and other pins are configured as communication terminals according to actual needs. Similarly, referring to fig. 2, the 1 st pin of the driving circuit is connected to the analog ground AGND, the 2 nd pin is connected to the power output terminal VCC of the driving circuit, the 7 th pin is connected to the input terminal Vin of the driving circuit, the 8 th pin is connected to the output terminal Vout of the driving circuit, and other pins are configured as communication pins according to actual requirements. Then, the ten-core shielding wire is used as a signal transmission line to connect the PIN of the connectors in the control circuit and the drive circuit, so that the corresponding PIN connection of the two circuits can be realized, that is, the PIN 1 of the connector in the control circuit is connected with the PIN 1 of the connector in the drive circuit, the PIN 2 of the connector in the control circuit is connected with the PIN 2 of the connector in the drive circuit, and so on.

When adopting the structure that sets up control circuit and drive circuit respectively on the circuit board of difference, control circuit and drive circuit can be in same box body, also can be in the box body of difference, and this application also with more conventional promptly: the control circuit is provided in the door operator controller, and the drive circuit is designed in the door operator driver. The door machine controller is used for a user to control and set various items of a door machine system, and generally comprises human-computer interaction components such as control buttons, a display screen and a touch screen besides the control circuit, wherein the human-computer interaction components are connected to the control circuit, specifically to a first main control chip IC in the control circuit, and are common designs, and detailed description is omitted in the application. The door machine driver executes corresponding control on the driving motor according to the control of a user in the door machine controller, and the door machine driver mainly comprises the driving circuit introduced above. When the conventional structure is adopted, the existing design is that 220V commercial power is generally input into a door driver and connected to an input end of a switching power supply in a driving circuit, the switching power supply in the driving circuit supplies power to the driving circuit after voltage conversion, and then the power supply is connected to a control circuit in a door controller through a power cord for supplying power, but the present application does not adopt the conventional power supply design, but the 220V commercial power is input into the door controller, the door controller in the present application further comprises a main power switch K0, please refer to fig. 3 to show a power supply schematic diagram between the door controller and the door driver in the present application, the main power switch K0 is a normally closed switch, the commercial power is input into one end of the door controller connected with the main power switch K0, the other end of the switch K0 is connected to the door driver through the main power cord, in particular to the input of a switching power supply in the driver circuit. Because the 220V mains supply of input is three-phase power usually, therefore main power switch K0 is three-pole double-throw switch usually, the power cord adopts 4 core shielded wires, this kind of power supply mode disclosed in this application, control circuit and drive circuit's power supply still is provided by switching power supply, but mains supply passes through main power switch K0 earlier and then gets into switching power supply, when taking place emergency situation, the user directly operates disconnection main power switch K0 on the door machine controller and can break off the total power supply of entire system, reach the effect of emergent outage, improve the security of entire system.

Optionally, door machine safety chain control system still includes non-contact's operation safety switch, operation safety switch in this application is the switch that all kinds can detect whether door machine system normally works, door machine system normal operating safety switch is closed, disconnection when taking place emergency, operation safety switch includes but not limited to motor temperature detect switch, infrared ray switch and proximity switch, motor temperature detect switch sets up in driving motor, motor temperature detect switch is closed when driving motor's operating temperature is normal, motor temperature detect switch disconnection when driving motor's operating temperature is too high. The transmitting end and the receiving end of the infrared switch are oppositely arranged on two sides of the door body driven by the driving motor, the infrared switch is closed when no shielding object is detected below the door body, and the infrared switch is disconnected when the shielding object is detected below the door body. The motor temperature control switch and the infrared switch are safety devices existing in the existing door machine system, and are not described in detail in the application. The proximity switch is a component which is specially added in the gantry crane system, the proximity switch adopts a module which is commercially available, please refer to fig. 4, the proximity switch 41 is arranged at the motor rotating shaft of the driving motor 42 and is opposite to the metal crank 43 inserted into the motor rotating shaft of the driving motor 42. When the driving motor 42 is normally powered on and operated, the hand crank 43 is not inserted into the driving motor 42, the proximity switch 41 does not sense the hand crank 43, and the proximity switch 41 is in a normally closed state; when the driving motor 42 is powered off and the door body needs to be opened and closed manually, the hand crank 43 is inserted into the driving motor 42, the proximity switch 41 senses the hand crank 43, and the proximity switch 41 is turned off.

The operation safety switch in the application is connected to the driving circuit or connected to the control circuit and configured according to actual conditions. Referring to fig. 5, it shows a connection circuit diagram when the driving circuit and the control circuit are both provided with a safety switch for operation, taking a motor temperature control switch K1 and a proximity switch K2 as an example, and an infrared switch K3 as an example. In the driving circuit, an anode input end of the fourth optical coupler OK4 is not directly connected to the input end Vin of the driving circuit, but is connected to the input end of the driving circuit through a fifth optical coupler OK5, and the model of the fifth optical coupler OK5 in this application is TLP 293. Specifically, an anode input end of the fourth optical coupler OK4 is connected to an emitter output end of the fifth optical coupler OK5, and a collector output end of the fifth optical coupler OK5 is connected to an input end Vin of the driving circuit. The cathode input end of the fifth optical coupler OK5 is connected to the analog ground AGND, the anode input end is connected to the power supply through the operation safety switch, and when there are a plurality of operation safety switches, the plurality of operation safety switches are connected in series. As shown in fig. 5, in the actual operation, a connector may be used to facilitate an external operation safety switch, in the example of connecting a motor temperature control switch K1 and a proximity switch K2, a 5-pin connector is reserved, the 5 pin of the connector is connected to the anode input end of a fifth optical coupler OK5, the 1 pin is connected to an analog ground AGND, the 2 pin is connected to a +12V power supply, and the 3 pin is connected to the 4 pin, the motor temperature control switch K1 is connected between the 2 pin and the 3 pin of the connector, and the proximity switch K2 is connected between the 4 pin and the 5 pin of the connector, so that the +12V power supply, the motor temperature control switch K1, the proximity switch K2, and the input end of the fifth optical coupler OK5 form a series circuit, if the external operation safety switch is not needed, the 2 pin and the 3 pin are shorted, the 4 pin and the 5 pin are shorted, so that the normal operation of the circuit can be realized, and the circuit may not actually have, the present application is not limited. In the control circuit, the emitter output end of the first optical coupler OK1 is connected with the anode input end of the second optical coupler OK2 and the output end Vout of the control circuit through a normally-closed operation safety switch, when a plurality of operation safety switches exist, the plurality of operation safety switches are connected in series, similarly, a connector can be adopted to facilitate an external operation safety switch, in the example of connecting an infrared switch K3, a 2-pin plug-in unit is reserved, 1 pin of the connector is connected with the first optical coupler OK1, 2 pins are connected with the second optical coupler OK2 and the output end Vout of the control circuit, two ends of the infrared switch K3 are respectively connected with 1 pin and 2 pins of the connector, similarly, if the external operation safety switch is not needed, the normal operation of the circuit can still be realized by short-circuiting the 1 pin and the 2 pins. It will be understood by those skilled in the art that, based on the above circuit configuration disclosed in the present application, the operation safety switch is a normally closed switch either connected to the control circuit or the driving circuit, but may actually be a normally open switch, and those skilled in the art may adjust the circuit based on the same principle, and the present application does not describe in detail various possible situations

It should be noted that the circuit diagram disclosed in the present application is only a circuit diagram of a safety chain structure part, and other parts of the actually complete circuit diagram may refer to the existing door machine control system, and according to the circuit structure of the door machine safety chain control system of the present application, the truth table of the system in the circuit structure shown in fig. 5 is as follows:

in the above table, L represents a low level, H represents a high level, and X represents any state or level, and then, in combination with the above truth table, it can be concluded that the driving motor normally operates only when the following 5 conditions are simultaneously satisfied, and the driving motor will stop as long as any one of the conditions is not satisfied, so as to achieve the purpose of safety and protection: (1) the signal transmission line between the control circuit and the drive circuit is in good contact; (2) an output signal SC _ SWITCH at the output end of the first main control chip IC1 is in a low level; (3) the output signal EN _ IN of the output end of the second main control chip IC2 is high level; (4) the operation safety switches in the driving circuit are closed; (5) and the operation safety switch in the control circuit is closed.

There are several abnormal cases corresponding to the above condition (1):

and (1.1) the

pins

1, 2, 7 and 8 between the control circuit and the driving circuit are in poor contact and are not conducted, the driving motor stops running according to the truth table.

When the communication pins except

pins

1, 2, 7 and 8 between the control circuit and the driving circuit are not IN good contact and are not conductive, as described above, the first main control chip IC1 IN the control circuit outputs the high-level output signal SC _ SWITCH at the output terminal because of detecting an abnormality, and the second main control chip IC2 IN the driving circuit outputs the low-level output signal EN _ IN at the output terminal because of detecting an abnormality, so that the driving motor also stops operating.

The abnormal condition corresponding to the above condition (2) is that when the first main control chip IC1 detects the occurrence of motor stalling and abnormal encoder communication, the output signal SC _ SWITCH at the output terminal of the first main control chip IC1 is at a high level, and the driving motor also stops operating.

The abnormal condition corresponding to the above condition (3) is that when the second main control chip IC2 detects the occurrence of overvoltage, overcurrent, motor stalling, encoder communication abnormality, and the like, the output signal EN _ IN at the output terminal of the second main control chip IC2 is at a low level, and the driving motor also stops operating.

The abnormal condition corresponding to the above condition (4) is that, the temperature that detects the drive motor when motor temperature detect switch K1 exceeds the protection temperature and breaks off, and/or, when proximity switch K2 detects the crank and inserts in the drive motor and breaks off, the condition that operation safety switch in the drive circuit has not closed exists, then the series circuit between +12V power and the fifth opto-coupler OK5 does not conduct, the drive motor will lead to not conducting between drive circuit's input Vin and the input of fourth opto-coupler OK4 this moment, the output of fourth opto-coupler OK4 can not be closed, thereby can make the drive motor stall. The danger caused by the overhigh temperature of the driving motor can be effectively avoided by the arrangement of the motor temperature control switch K1. The arrangement of the proximity switch K2 can effectively avoid the danger caused by sudden power on when a user inserts the hand crank to manually open and close the door when the driving motor is powered off.

The abnormal condition corresponding to the above condition (5) is that when the infrared switch K3 detects an obstacle and is turned off, the operation safety switch in the control circuit is not closed, and even if the output end of the first optical coupler OK1 is closed, the output end of the fourth optical coupler OK4 is not closed, so that the driving motor can stop operating.

What has been described above is only a preferred embodiment of the present application, and the present invention is not limited to the above embodiments. It is to be understood that other modifications and variations directly derivable or suggested by those skilled in the art without departing from the spirit and scope of the present invention are to be considered as included within the scope of the present invention.

Claims

1. The utility model provides a door machine safety chain control system of high security which characterized in that, door machine safety chain control system includes: a control circuit, a drive circuit and a drive motor;

the output end of a first main control chip in the control circuit is connected with the cathode input end of a first optical coupler, the anode input end of the first optical coupler is connected with a power supply, the collector output end of the first optical coupler is connected with the power supply input end of the control circuit, the emitter output end of the first optical coupler is respectively connected with the anode input end of a second optical coupler and the output end of the control circuit, the cathode input end of the second optical coupler is connected with an analog ground, the collector output end of the second optical coupler is connected with one input end of the first main control chip, and the emitter; the input end of the control circuit is connected with the anode input end of a third optocoupler, the cathode input end and the emitter output end of the third optocoupler are respectively connected with a simulation ground, and the collector output end is connected with the other input end of the first main control chip;

the output end of a second main control chip in the driving circuit is connected with one input end of an AND gate, the other input end of the AND gate is connected with the output end of an emitter of a fourth optocoupler, the output end of the emitter of the fourth optocoupler is also connected with the input end of the second main control chip, the output end of the emitter of the fourth optocoupler is also connected with an output ground through a pull-down resistor, the output end of a collector of the fourth optocoupler is connected with a power supply, the input end of an anode of the fourth optocoupler is connected with the input end of the driving circuit, and the input; the output end of the AND gate is connected with the enabling end of a motor driving chip in the driving circuit; the input end of a switch power supply in the drive circuit is connected with a mains supply, the output end of the switch power supply supplies power to the drive circuit, and the output end of the switch power supply is also connected with the power output end of the drive circuit;

2. The gantry crane safety chain control system according to claim 1, further comprising a non-contact type operation safety switch, wherein the operation safety switch is connected to the driving circuit, so that an anode input end of the fourth optical coupler is connected to an input end of the driving circuit through a fifth optical coupler, an anode input end of the fourth optical coupler is connected to an emitter output end of the fifth optical coupler, and a collector output end of the fifth optical coupler is connected to an input end of the driving circuit; and the cathode input end of the fifth optocoupler is connected with an analog ground, and the anode input end of the fifth optocoupler is connected to a power supply through the operation safety switch.

3. The gantry crane safety chain control system according to claim 1, further comprising a non-contact operation safety switch, wherein the operation safety switch is connected to the control circuit, and then the emitter output end of the first optical coupler is connected to the anode input end of the second optical coupler and the output end of the control circuit through the operation safety switch.

4. The door machine safety chain control system according to claim 2 or 3, characterized in that, the operation safety switch includes but not limited to motor temperature control switch, infrared switch and proximity switch, motor temperature control switch sets up in the driving motor, infrared switch's transmitting terminal and receiving terminal subtend set up the both sides of the door body of driving motor drive, proximity switch sets up driving motor's motor shaft department to just to inserting the crank in driving motor's the motor shaft.

5. The door machine safety chain control system according to claim 1, wherein the control circuit is disposed in a door machine controller, the driving circuit is disposed in a door machine driver, the control circuit and the driving circuit are connected through a signal transmission line, and then the door machine controller further comprises a main power switch, and an input end of a switching power supply in the driving circuit is connected to a mains power supply through the main power switch.

6. The door machine safety chain control system according to claim 1, wherein the model of the first main control chip is LPC1767, the model of the second main control chip is TMS320F28027F, and the model of the motor driving chip is IRS 23364.