CN111717745A - Two-wire system communication system and method for elevator human-computer interface product - Google Patents
Two-wire system communication system and method for elevator human-computer interface product Download PDFInfo
- Publication number
- CN111717745A CN111717745A CN202010698363.2A CN202010698363A CN111717745A CN 111717745 A CN111717745 A CN 111717745A CN 202010698363 A CN202010698363 A CN 202010698363A CN 111717745 A CN111717745 A CN 111717745A
- Authority
- CN
- China
- Prior art keywords
- circuit
- voltage
- host
- communication
- bus
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B1/00—Control systems of elevators in general
- B66B1/34—Details, e.g. call counting devices, data transmission from car to control system, devices giving information to the control system
- B66B1/3415—Control system configuration and the data transmission or communication within the control system
- B66B1/3423—Control system configuration, i.e. lay-out
- B66B1/3438—Master-slave control system configuration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B1/00—Control systems of elevators in general
- B66B1/34—Details, e.g. call counting devices, data transmission from car to control system, devices giving information to the control system
- B66B1/3415—Control system configuration and the data transmission or communication within the control system
- B66B1/3446—Data transmission or communication within the control system
- B66B1/3453—Procedure or protocol for the data transmission or communication
Landscapes
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Computer Networks & Wireless Communication (AREA)
- Indicating And Signalling Devices For Elevators (AREA)
- Elevator Control (AREA)
Abstract
The invention discloses a two-wire system communication system of an elevator human-computer interface product, which comprises a building control host, wherein the building control host is connected with a plurality of protocol adapter plates through a bus, the protocol adapter plates are connected to an elevator panel through cables, and the elevator panel comprises a plurality of buttons; the building control host comprises a host circuit, the host circuit is provided with a communication power supply circuit, and the communication power supply circuit transmits electric energy and interacts information with the protocol adapter plate through a bus; the protocol switching board comprises a slave circuit, the slave circuit comprises a communication power receiving circuit, and the communication power receiving circuit receives electric energy and exchanges information with a host circuit through a bus. By arranging the system, a collinear structure of communication and power supply is realized, and data communication between the elevator control host and the button can be realized; the original four-wire system button is changed into a two-wire system, so that the two-in-one communication and power supply is realized, and the wiring is reduced; the problem of communication faults caused by misconnection and reverse connection of the power supply and the communication line is solved.
Description
Technical Field
The invention relates to the field of elevators, in particular to a two-wire system communication system and a two-wire system communication method for an elevator human-computer interface product.
Background
An elevator is a fixed type elevator that serves a number of specific floors in a building, serving a specified floor. The vertical lift elevator has a car that runs between at least two vertical rows of rigid guide rails or guide rails with an angle of inclination of less than 15 °. The size and the structural form of the car are convenient for passengers to access or load and unload goods. It is customary to use elevators as a generic term for vertical transport means in buildings, irrespective of their drive mode. According to the speed, the elevator can be divided into a low-speed elevator (below 4 m/s), a high-speed elevator (4-12 m/s) and a high-speed elevator (above 12 m/s). The hydraulic elevator begins to appear in the middle of the 19 th century and is still applied to low-rise buildings until now. In 1852, e.g. austs in the united states developed a safety hoist for wire rope hoisting. In the 80 s, further improvements were made to the drive means, such as motors driving the winding drum via a worm drive, the use of counterweights, etc. At the end of the 19 th century, friction wheel transmission is adopted, and the lifting height of the elevator is greatly increased.
The elevator system comprises an electrical control system, the main function of which is to operate and control the operation of the elevator. The electric control system mainly comprises an operating device, a position display device, a control screen (cabinet), a leveling device, a layer selector and the like. The electrical control system needs to be connected to the whole from top to bottom, which brings great challenges and costs to power supply and communication.
The button is the indispensable input device in elevator product, and current elevator all is the separated setting of power supply and communication, and this will have the installation cost height, maintains complicated problem.
Disclosure of Invention
The invention aims to: in order to solve the existing problems, the two-wire system communication system and the method of the elevator human-computer interface product are provided, the structure of the elevator buttons is simplified, the button connecting wires are reduced, the serial connection mode is adopted, each button is independently communicated, and the communication and power supply are collinear, so that the two-wire system communication button is formed. The button with the structure is beneficial to simplifying the circuit structure of the whole machine in practical application, and the design cost is reduced.
The technical scheme adopted by the invention is as follows:
a two-wire system communication system of an elevator human-computer interface product comprises a floor control host, wherein the floor control host is connected with a plurality of protocol adapter plates through a bus, the protocol adapter plates are connected to an elevator panel through cables, and the elevator panel comprises a plurality of buttons; the building control host comprises a host circuit, the host circuit is provided with a communication power supply circuit, and the communication power supply circuit transmits electric energy and interacts information with the protocol adapter plate through a bus; the protocol switching board comprises a slave circuit, the slave circuit comprises a communication power receiving circuit, and the communication power receiving circuit receives electric energy and exchanges information with a host circuit through a bus.
Furthermore, the invention discloses a preferable structure of a two-wire system communication system of an elevator human-computer interface product, wherein the host circuit comprises an MCU, the communication power supply circuit comprises a voltage code sending circuit, the MCU is in signal connection with the voltage code sending circuit through a cable, and the voltage code sending circuit is electrically connected with a bus.
Furthermore, the host circuit comprises a current decoding circuit, the current decoding circuit is in signal connection with the MCU through a cable, and the current decoding circuit is in signal connection with the bus through a cable.
Further, the communication power receiving circuit comprises a power supply circuit, an input end of the power supply circuit is electrically connected with the bus, and an output end of the power supply circuit supplies power to the whole slave circuit.
Furthermore, the slave computer circuit comprises an MCU, the communication power receiving circuit comprises a voltage code receiving circuit, the input end of the voltage code receiving circuit is connected with the bus signal, and the output end of the voltage code receiving circuit is connected with the MCU signal through a cable.
Furthermore, the communication power receiving circuit comprises a current code returning circuit, the input end of the current code returning circuit is in signal connection with the MCU, and the output end of the voltage code receiving circuit is electrically connected with the bus through a cable.
Furthermore, the building control host is connected with the protocol adapter plate through an RS485 interface, the power supply circuit comprises a voltage stabilizing filter circuit, the input end of the voltage stabilizing filter circuit is electrically connected with the bus, the output end of the voltage stabilizing filter circuit is connected with an LDO voltage stabilizer, and the output end of the LDO voltage stabilizer supplies power to the MCU.
Furthermore, the slave circuit adopts STM8 to modulate and demodulate communication, and STM8 can realize power-off storage by flash; and after receiving an automatic coding instruction, entering an automatic coding mode, waiting for the host to allocate an address, and recording the address allocated by the host when a key is triggered. And replies to the host acknowledge message.
A communication method of a two-wire system communication system of an elevator human-computer interface product comprises the following steps:
1. the host machine transmits electric energy and signals, the host machine circuit transmits power supply and voltage communication signals to the bus through the MCU to the voltage code transmitting circuit, high and low levels are represented by adopting different voltage values, low voltage represents 0, the high-voltage ammeter 1 represents 0 and 1 by adopting different duty ratios, and frame intervals are added to complete transmission of complete data;
2. then the slave computer is started by receiving electric energy, the slave computer circuit gets electricity at the bus through the power circuit, the obtained power is subjected to voltage stabilization and filtering regulation through the voltage stabilization filtering circuit, and then the further voltage stabilization is carried out through the LDO voltage stabilizer and the power is sent to the MCU;
3. then the slave receives the signal, the slave circuit receives the code through the voltage code receiving circuit, the voltage code receiving circuit detects the voltage of the bus, determines the received signal according to the current of the voltage measuring circuit, judges whether the data sent by the host is 0 or 1, and then converts the binary system into the specifically transmitted data; separating each data according to the frame interval;
4. then the slave machine transmits signals, the slave machine circuit carries out code returning through a current code returning circuit, the current code returning circuit converts data to be transmitted into binary systems only with 0 and 1, then two currents with different time lengths are adopted to respectively represent 0 and 1 to modulate the current in the bus, and frame intervals are added to complete the reply of complete data;
5. the host receives the signal, the host circuit decodes through the current decoding circuit, the current in the circuit is measured, whether the data replied by the slave is 0 or 1 is judged according to the magnitude of the current, and then the binary system is converted into the specifically transmitted data; and then, the data are separated according to the frame interval.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. by arranging the system, a collinear structure of communication and power supply is realized, and data communication between the elevator control host and the button can be realized; the original four-wire system button is changed into a two-wire system, so that the two-in-one communication and power supply is realized, and the wiring is reduced; the problem of communication faults caused by misconnection and reverse connection of the power supply and the communication line is solved.
2. Through setting up this system, can simplify equipment structure improve equipment's security and stability. The button is prevented from being burnt out due to the fact that a circuit is reversely connected when a constructor connects the wire; and realizing independent communication of each button.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of the structure of the host of the present invention;
FIG. 3 is a schematic diagram of the structure of a slave of the present invention;
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1:
as shown in fig. 1-3, the invention discloses a two-wire system communication system of an elevator human-computer interface product, which comprises a building control host, wherein the building control host is connected with a plurality of protocol switching boards through a bus, and is connected with the protocol switching boards through an RS485 interface. The protocol switching board is connected to the elevator panel through a cable, and the elevator panel comprises a plurality of buttons.
The building control host comprises a host circuit, the host circuit is provided with a communication power supply circuit, and the communication power supply circuit transmits electric energy and interacts information with the protocol adapter plate through a bus; the host circuit comprises an MCU, the communication power supply circuit comprises a voltage code sending circuit, the MCU is in signal connection with the voltage code sending circuit through a cable, and the voltage code sending circuit is electrically connected with the bus. The host circuit comprises a current decoding circuit, the current decoding circuit is in signal connection with the MCU through a cable, and the current decoding circuit is in signal connection with the bus through a cable.
The protocol switching board comprises a slave circuit, the slave circuit comprises a communication power receiving circuit, and the communication power receiving circuit receives electric energy and exchanges information with a host circuit through a bus. The communication power receiving circuit comprises a power supply circuit, the input end of the power supply circuit is electrically connected with the bus, and the output end of the power supply circuit supplies power to the whole slave circuit.
The slave circuit comprises an MCU, the communication power receiving circuit comprises a voltage code receiving circuit, the input end of the voltage code receiving circuit is connected with a bus signal, and the output end of the voltage code receiving circuit is connected with the MCU signal through a cable. The communication power receiving circuit comprises a current code returning circuit, the input end of the current code returning circuit is in signal connection with the MCU, and the output end of the voltage code receiving circuit is electrically connected with the bus through a cable.
The power supply circuit comprises a voltage stabilizing filter circuit, the input end of the voltage stabilizing filter circuit is electrically connected with the bus, the output end of the voltage stabilizing filter circuit is connected with an LDO voltage stabilizer, and the output end of the LDO voltage stabilizer supplies power to the MCU.
The slave circuit adopts STM8 to modulate and demodulate communication, and STM8 can realize power-off storage by flash; and after receiving an automatic coding instruction, entering an automatic coding mode, waiting for the host to allocate an address, and recording the address allocated by the host when a key is triggered. And replies to the host acknowledge message.
When the device is used specifically, the device is installed, a cable and a power supply are connected, and the device is started.
In the specific operation process, the master control elevator can be provided with a plurality of protocol adapter plates, and the protocol adapter plates adopt RS485 interfaces to carry out data communication with the elevator control host, so that a network topology mode of one master and a plurality of slaves is realized. The button and the protocol transfer board adopt a bus form, and a network topology mode of one master and multiple slaves is also realized. And the protocol transfer board uploads the acquired data of the button according to the protocol format of the elevator host. And transmitting the data issued by the host to the button according to the data format communicated with the button. The system realizes a collinear structure of communication and power supply, and can realize data communication between the elevator control host and the button. The problem of communication faults caused by misconnection and reverse connection of the power supply and the communication line is solved.
Example 2:
on the basis of embodiment 1, a communication method of a two-wire system communication system of an elevator human-machine interface product is disclosed, which comprises the following steps:
1. the host machine transmits electric energy and signals, the host machine circuit transmits power supply and voltage communication signals to the bus through the MCU to the voltage code transmitting circuit, high and low levels are represented by adopting different voltage values, low voltage represents 0, the high-voltage ammeter 1 represents 0 and 1 by adopting different duty ratios, and frame intervals are added to complete transmission of complete data;
2. then the slave computer is started by receiving electric energy, the slave computer circuit gets electricity at the bus through the power circuit, the obtained power is subjected to voltage stabilization and filtering regulation through the voltage stabilization filtering circuit, and then the further voltage stabilization is carried out through the LDO voltage stabilizer and the power is sent to the MCU;
3. then the slave receives the signal, the slave circuit receives the code through the voltage code receiving circuit, the voltage code receiving circuit detects the voltage of the bus, determines the received signal according to the current of the voltage measuring circuit, judges whether the data sent by the host is 0 or 1, and then converts the binary system into the specifically transmitted data; separating each data according to the frame interval;
4. then the slave machine transmits signals, the slave machine circuit carries out code returning through a current code returning circuit, the current code returning circuit converts data to be transmitted into binary systems only with 0 and 1, then two currents with different time lengths are adopted to respectively represent 0 and 1 to modulate the current in the bus, and frame intervals are added to complete the reply of complete data;
5. the host receives the signal, the host circuit decodes through the current decoding circuit, the current in the circuit is measured, whether the data replied by the slave is 0 or 1 is judged according to the magnitude of the current, and then the binary system is converted into the specifically transmitted data; and then, the data are separated according to the frame interval.
The method can integrate the communication cable and the signal cable, prevent workers from reversely connecting, reduce the complexity of the system, improve the reliability of the system, reduce wiring, reduce cost and improve economic benefit.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. A two-wire system communication system of an elevator human-computer interface product is characterized in that: the elevator control system comprises a floor control host, wherein the floor control host is connected with a plurality of protocol adapter plates through a bus, the protocol adapter plates are connected to an elevator panel through cables, and the elevator panel comprises a plurality of buttons; the building control host comprises a host circuit, the host circuit is provided with a communication power supply circuit, and the communication power supply circuit transmits electric energy and interacts information with the protocol adapter plate through a bus; the protocol switching board comprises a slave circuit, the slave circuit comprises a communication power receiving circuit, and the communication power receiving circuit receives electric energy and exchanges information with a host circuit through a bus.
2. The elevator human-machine interface product two-wire communication system of claim 1, wherein: the host circuit comprises an MCU, the communication power supply circuit comprises a voltage code sending circuit, the MCU is in signal connection with the voltage code sending circuit through a cable, and the voltage code sending circuit is electrically connected with the bus.
3. The elevator human-machine interface product two-wire communication system of claim 2, wherein: the host circuit comprises a current decoding circuit, the current decoding circuit is in signal connection with the MCU through a cable, and the current decoding circuit is in signal connection with the bus through a cable.
4. A two-wire communication system of an elevator human machine interface product according to any of claims 1-3, characterized in that: the communication power receiving circuit comprises a power supply circuit, the input end of the power supply circuit is electrically connected with the bus, and the output end of the power supply circuit supplies power to the whole slave circuit.
5. The elevator human-machine interface product two-wire communication system of claim 4, wherein: the slave circuit comprises an MCU, the communication power receiving circuit comprises a voltage code receiving circuit, the input end of the voltage code receiving circuit is connected with a bus signal, and the output end of the voltage code receiving circuit is connected with the MCU signal through a cable.
6. The elevator human-machine interface product two-wire communication system of claim 5, wherein: the communication power receiving circuit comprises a current code returning circuit, the input end of the current code returning circuit is in signal connection with the MCU, and the output end of the voltage code receiving circuit is electrically connected with the bus through a cable.
7. The elevator human-machine interface product two-wire communication system of claim 6, wherein: the building control host is connected with the protocol adapter plate through an RS485 interface, the power supply circuit comprises a voltage stabilizing filter circuit, the input end of the voltage stabilizing filter circuit is electrically connected with the bus, the output end of the voltage stabilizing filter circuit is connected with an LDO voltage stabilizer, and the output end of the LDO voltage stabilizer supplies power to the MCU.
8. The elevator human interface product two-wire communication system of claim 7, wherein: the slave circuit adopts STM8 to modulate and demodulate communication, and STM8 can realize power-off storage by flash; and after receiving an automatic coding instruction, entering an automatic coding mode, waiting for the host to allocate an address, and recording the address allocated by the host when a key is triggered. And replies to the host acknowledge message.
9. The communication method of the two-wire system communication system of the elevator human-machine interface product based on claim 8 is characterized by comprising the following steps:
1. the host machine transmits electric energy and signals, the host machine circuit transmits power supply and voltage communication signals to the bus through the MCU to the voltage code transmitting circuit, high and low levels are represented by adopting different voltage values, low voltage represents 0, the high-voltage ammeter 1 represents 0 and 1 by adopting different duty ratios, and frame intervals are added to complete transmission of complete data;
2. then the slave computer is started by receiving electric energy, the slave computer circuit gets electricity at the bus through the power circuit, the obtained power is subjected to voltage stabilization and filtering regulation through the voltage stabilization filtering circuit, and then the further voltage stabilization is carried out through the LDO voltage stabilizer and the power is sent to the MCU;
3. then the slave receives the signal, the slave circuit receives the code through the voltage code receiving circuit, the voltage code receiving circuit detects the voltage of the bus, determines the received signal according to the current of the voltage measuring circuit, judges whether the data sent by the host is 0 or 1, and then converts the binary system into the specifically transmitted data; separating each data according to the frame interval;
4. then the slave machine transmits signals, the slave machine circuit carries out code returning through a current code returning circuit, the current code returning circuit converts data to be transmitted into binary systems only with 0 and 1, then two currents with different time lengths are adopted to respectively represent 0 and 1 to modulate the current in the bus, and frame intervals are added to complete the reply of complete data;
5. the host receives the signal, the host circuit decodes through the current decoding circuit, the current in the circuit is measured, whether the data replied by the slave is 0 or 1 is judged according to the magnitude of the current, and then the binary system is converted into the specifically transmitted data; and then, the data are separated according to the frame interval.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010698363.2A CN111717745A (en) | 2020-07-20 | 2020-07-20 | Two-wire system communication system and method for elevator human-computer interface product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010698363.2A CN111717745A (en) | 2020-07-20 | 2020-07-20 | Two-wire system communication system and method for elevator human-computer interface product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111717745A true CN111717745A (en) | 2020-09-29 |
Family
ID=72572863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010698363.2A Pending CN111717745A (en) | 2020-07-20 | 2020-07-20 | Two-wire system communication system and method for elevator human-computer interface product |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111717745A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112543130A (en) * | 2020-12-11 | 2021-03-23 | 柯提斯电气(杭州)有限公司 | Intelligent communication detection system and communication method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5387769A (en) * | 1993-06-01 | 1995-02-07 | Otis Elevator Company | Local area network between an elevator system building controller, group controller and car controller, using redundant communication links |
| CN201367281Y (en) * | 2009-03-11 | 2009-12-23 | 上海贝思特电气有限公司 | Bus line button for high-storey elevator |
| CN202795632U (en) * | 2012-07-20 | 2013-03-13 | 深圳市赋安安全系统有限公司 | Two-wire electric fire monitoring system |
| CN202978888U (en) * | 2012-11-27 | 2013-06-05 | 威海凯瑞电气技术有限公司 | MCU level and two-wire system communication conversion circuit |
| CN204334862U (en) * | 2014-12-22 | 2015-05-13 | 青岛乔威电子科技有限公司 | A kind of medical communication calling system Special answering equipment |
| CN108516428A (en) * | 2018-04-19 | 2018-09-11 | 上海新时达电气股份有限公司 | A kind of elevator internet of things equipment |
| CN208037758U (en) * | 2017-12-31 | 2018-11-02 | 杭州句力科技有限公司 | Communication system is called out outside elevator |
-
2020
- 2020-07-20 CN CN202010698363.2A patent/CN111717745A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5387769A (en) * | 1993-06-01 | 1995-02-07 | Otis Elevator Company | Local area network between an elevator system building controller, group controller and car controller, using redundant communication links |
| CN201367281Y (en) * | 2009-03-11 | 2009-12-23 | 上海贝思特电气有限公司 | Bus line button for high-storey elevator |
| CN202795632U (en) * | 2012-07-20 | 2013-03-13 | 深圳市赋安安全系统有限公司 | Two-wire electric fire monitoring system |
| CN202978888U (en) * | 2012-11-27 | 2013-06-05 | 威海凯瑞电气技术有限公司 | MCU level and two-wire system communication conversion circuit |
| CN204334862U (en) * | 2014-12-22 | 2015-05-13 | 青岛乔威电子科技有限公司 | A kind of medical communication calling system Special answering equipment |
| CN208037758U (en) * | 2017-12-31 | 2018-11-02 | 杭州句力科技有限公司 | Communication system is called out outside elevator |
| CN108516428A (en) * | 2018-04-19 | 2018-09-11 | 上海新时达电气股份有限公司 | A kind of elevator internet of things equipment |
Non-Patent Citations (2)
| Title |
|---|
| 江小平等: "基于PIC单片机的新型医用呼叫对讲系统设计", 《现代电子技术》 * |
| 秦宪礼: "《安全监测监控原理》", 31 March 2015 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112543130A (en) * | 2020-12-11 | 2021-03-23 | 柯提斯电气(杭州)有限公司 | Intelligent communication detection system and communication method thereof |
| CN112543130B (en) * | 2020-12-11 | 2021-08-06 | 柯提斯电气(杭州)有限公司 | Intelligent communication detection system and communication method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20150158695A1 (en) | Elevator installation modernization using an existing interface | |
| CN110072793B (en) | Elevator renewing method and elevator control panel | |
| CN206842767U (en) | A kind of self study double mode elevator car position supervising device | |
| CN111717745A (en) | Two-wire system communication system and method for elevator human-computer interface product | |
| CN207596269U (en) | A kind of elevator intercommunication phone system based on security protection net | |
| CN101252374B (en) | Communication system of elevator calling | |
| CN111194293B (en) | Method for renovating elevator | |
| CN201261665Y (en) | Elevator calling apparatus realized by electric power carrier communication | |
| CN1139644A (en) | Elevator equipment | |
| CN203754162U (en) | Villa elevator control system | |
| CN215101345U (en) | Elevator retinue cable amplitude of oscillation detection device | |
| JPS6349942B2 (en) | ||
| CN103640936B (en) | villa elevator control system and method | |
| CN112010141B (en) | Safety switch and detection system | |
| CN210854863U (en) | Economical trailing cable | |
| CN213085097U (en) | Elevator control system | |
| CN213707429U (en) | Power transmission device of elevator and elevator | |
| CN217282221U (en) | Power supply system of variable-frequency construction elevator | |
| CN113460818B (en) | Elevator electronic board communication system, method, device and computer readable storage medium | |
| CN203754165U (en) | Construction elevator landing calling system | |
| JP2013184760A (en) | Elevator | |
| CN219730199U (en) | Floor calling system and elevator | |
| CN215364341U (en) | Control and drive integrated elevator and car door system | |
| CN220935044U (en) | Special frequency converter control system for single inversion lifter of common direct current bus | |
| CN220201072U (en) | Split type elevator control cabinet and elevator control system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200929 |