CN221042891U - Connection circuit of anti-interference communication mode of power failure emergency device - Google Patents
Connection circuit of anti-interference communication mode of power failure emergency device Download PDFInfo
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- CN221042891U CN221042891U CN202322836966.6U CN202322836966U CN221042891U CN 221042891 U CN221042891 U CN 221042891U CN 202322836966 U CN202322836966 U CN 202322836966U CN 221042891 U CN221042891 U CN 221042891U
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- 238000004891 communication Methods 0.000 title claims abstract description 35
- 230000008054 signal transmission Effects 0.000 claims abstract description 9
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- 239000002184 metal Substances 0.000 description 4
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- Indicating And Signalling Devices For Elevators (AREA)
Abstract
The utility model discloses a connection circuit of an anti-interference communication mode of a power failure emergency device, which relates to the technical field of emergency communication and comprises the following components: the elevator CPU module is electrically connected with the power failure emergency device through a CAN signal transmission bus; the CAN signal transmission bus adopts a three-wire system, and comprises signal lines CANH, CANL and GND; the utility model uses CAN communication to communicate between the power failure emergency device and the elevator CPU module, and CAN of two terminals adopts the CAN bus transceivers of the same model, the same CAN bus transceiver circuit principle and the same CAN bus physical layer regularly designed by the printed circuit board; when the power failure emergency device and the elevator CPU module need information interaction, the CAN protocol CAN be used for transmitting information, so that the transmission rate is high, the error rate is low, the effect is good, the signal transmission channel circuit design required by the prior art is omitted, the components and the cost are saved.
Description
Technical Field
The utility model relates to the technical field of emergency communication, in particular to a connecting circuit of an anti-interference communication mode of a power failure emergency device.
Background
The CAN bus is a serial communication mode for implementing information exchange between electronic devices, and the method is that the metal wires are respectively connected with the input and output signal ends of CAN communication interface circuits in the electronic devices to form a data communication network based on the bus, so that the information exchange between the electronic devices is completed.
Research and application of fieldbuses has become a hotspot in the field of industrial data buses. While current research on fieldbuses has not yet proposed a perfect standard, the high cost performance of fieldbuses has attracted adoption by numerous industrial control systems. Meanwhile, the standard of the field bus is not unified, so that the application of the field bus can be exerted independently, and a richer basis is provided for the perfection of the field bus. The power failure emergency device adopts a CAN communication mode to communicate data with the elevator CPU module in real time, the CAN communication has good anti-interference performance, the transmitted data is more accurate through software filtering, the reliability and the instantaneity of the system are greatly improved, the system development cost is low, the cost performance is high, and the installation and the maintenance of the measurement and control node are simple. CAN communication CAN withstand field test, and communication rate is high, and error rate is extremely low, and the operation effect is good, has embodied the high performance of CAN bus, the advantage of high reliability. The method is also an important reason for selecting CAN communication in the application of the patent;
In order to overcome the situation that the elevator is powered off by an external power supply, the communication between the power failure emergency device and the elevator main board is realized. Therefore, the connecting circuit of the anti-interference communication mode of the power failure emergency device is provided.
Disclosure of utility model
The technical problems solved by the utility model are as follows: in order to solve the problem that the power failure emergency device and the elevator main board are communicated under the condition that an external power supply is powered off.
The utility model can be realized by the following technical scheme: a connection circuit for an anti-interference communication mode of a power failure emergency device, comprising: the elevator comprises an elevator CPU module and a power failure emergency device, wherein the elevator CPU module is electrically connected with the power failure emergency device through a CAN signal transmission bus;
The mode of connecting the prior information transmission multipath signal lines is replaced, and the multipath signal lines are needed when the prior power failure emergency device and the elevator CPU module transmit information. The CAN is adopted to realize information interaction between the power failure emergency device and the elevator CPU module, and the CAN bus interface of the elevator CPU module is connected with the CAN bus terminal of the power failure emergency device to form a bus communication system, and only three wires of the CAN are required to be connected.
The utility model further technically improves that: the CAN signal transmission bus adopts a three-wire system, and comprises signal lines CANH, CANL and GND; the power failure emergency device has good anti-interference capability compared with other signal transmission modes by using CAN communication, the CAN communication adopts three-wire connection, namely signal lines CANH, CANL and GND, replaces the current relay or optocoupler transmission channel information transmission mode, adopts CAN bus technology, has large and stable transmission quantity, and CAN save the design of external channel circuits such as relays, optocouplers and the like;
The power failure emergency device can output three-phase 380V alternating current to the elevator control system to serve as power supply under the state that the elevator system suddenly fails, the elevator CPU module can control the elevator to run to a flat layer to open a door to release passengers, and when all the passengers release the door locks to be closed, the power failure emergency device cuts off a power supply circuit. In the process, the external power supply is powered off, and when the power failure emergency device is used for supplying power, the power failure emergency device adopts CAN bus communication to transmit various information with the elevator CPU module. The CAN communication is used for communication between the power failure emergency device and the elevator CPU module, and CAN of the two terminals adopts CAN bus transceivers of the same model, the same CAN bus transceiver circuit principle and the same CAN bus physical layer regularly designed by the printed circuit board. The two terminals are connected with a power ground, a CAN transmitting signal and a CAN receiving signal through 3 metal wires.
Compared with the prior art, the utility model has the following beneficial effects:
(1) When the power failure emergency device is used for supplying power, the power failure emergency device adopts CAN bus communication to transmit various information with the elevator CPU module. The CAN communication is used for communication between the power failure emergency device and the elevator CPU module, and CAN of the two terminals adopts CAN bus transceivers of the same model, the same CAN bus transceiver circuit principle and the same CAN bus physical layer regularly designed by the printed circuit board. The two terminals are connected with a power ground, a CAN transmitting signal and a CAN receiving signal through 3 metal wires;
(2) When the power failure emergency device and the elevator CPU module need information interaction, the CAN protocol CAN be used for transmitting information, so that the transmission rate is high, the error rate is low, the effect is good, the signal transmission channel circuit design required by the prior art is omitted, the components and the cost are saved.
Drawings
The present utility model is further described below with reference to the accompanying drawings for the convenience of understanding by those skilled in the art.
Fig. 1 is a schematic diagram of the system of this patent.
Fig. 2 is a schematic diagram of the hardware connections of the present patent.
Fig. 3 is a flow chart of a communication process.
Detailed Description
In order to further describe the technical means and effects adopted by the utility model for achieving the preset aim, the following detailed description is given below of the specific implementation, structure, characteristics and effects according to the utility model with reference to the attached drawings and the preferred embodiment.
The power failure emergency device can output three-phase 380V alternating current to the elevator control system to serve as power supply under the state that the elevator system suddenly fails, the elevator CPU module can control the elevator to run to a flat layer to open a door to release passengers, and when all the passengers release the door locks to be closed, the power failure emergency device cuts off a power supply circuit. In the process, the external power supply is powered off, and when the power failure emergency device is used for supplying power, the power failure emergency device adopts CAN bus communication to transmit various information with the elevator CPU module. The CAN communication is used for communication between the power failure emergency device and the elevator CPU module, and CAN of the two terminals adopts CAN bus transceivers of the same model, the same CAN bus transceiver circuit principle and the same CAN bus physical layer regularly designed by the printed circuit board. The two terminals are connected with a power ground, a CAN transmitting signal and a CAN receiving signal through 3 metal wires.
Firstly, as shown in the design schematic diagram of the CAN transceiver circuit in fig. 2, the CAN transceiver circuit is composed of a CAN transceiver chip U21, a TJA1040T chip, a signal connection plug-in CAN1, a resistor R87, a resistor R88, and a power decoupling capacitor C55. The power failure emergency device controls the RxCAN pin of the CPU to be connected with the RXD pin of the CAN transceiver through R88, and the TxCAN pin of the CPU is connected with the TXD pin of the CAN transceiver through resistor R87. The power failure emergency device is required to be connected with a CAN communication terminal of the elevator CPU module through a connector CAN 1. The connector CAN1 receives a CAN transmission signal transmitted by the elevator CPU module or transmits a CAN transmission signal transmitted by the power failure emergency device. The twisted pair connection and the CAN communication 2.0B protocol are adopted to transfer information; the CAN transceiver TJA1040T is a CAN bus transceiver produced by PH IL IPS; the resistor R87 and the resistor R88 are resistors of 0.1W, and the resistance value is 330 ohms; the capacitors C55 and C56 are decoupling capacitors, and the capacitance value is 0.1uF.
The perfect communication protocol of the CAN CAN be realized by a CAN controller chip and an interface chip thereof, thereby greatly reducing the development difficulty of the system and shortening the development period.
The present utility model is not limited to the above embodiments, but is capable of modification and variation in all aspects, including those of ordinary skill in the art, without departing from the spirit and scope of the present utility model.
Claims (2)
1. The utility model provides a connection circuit of anti-interference communication mode of power failure emergency device which characterized in that includes: the elevator CPU module is electrically connected with the power failure emergency device through the CAN signal transmission bus.
2. The connection circuit for an anti-interference communication mode of a power failure emergency device according to claim 1, wherein the CAN signal transmission bus adopts a three-wire system, and comprises signal lines CANH, CANL and GND.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322836966.6U CN221042891U (en) | 2023-10-23 | 2023-10-23 | Connection circuit of anti-interference communication mode of power failure emergency device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322836966.6U CN221042891U (en) | 2023-10-23 | 2023-10-23 | Connection circuit of anti-interference communication mode of power failure emergency device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221042891U true CN221042891U (en) | 2024-05-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322836966.6U Active CN221042891U (en) | 2023-10-23 | 2023-10-23 | Connection circuit of anti-interference communication mode of power failure emergency device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221042891U (en) |
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2023
- 2023-10-23 CN CN202322836966.6U patent/CN221042891U/en active Active
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