CN112299169A - Elevator well signal transmission device and elevator - Google Patents
Elevator well signal transmission device and elevator Download PDFInfo
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- CN112299169A CN112299169A CN202011157249.5A CN202011157249A CN112299169A CN 112299169 A CN112299169 A CN 112299169A CN 202011157249 A CN202011157249 A CN 202011157249A CN 112299169 A CN112299169 A CN 112299169A
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Computer Networks & Wireless Communication (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Indicating And Signalling Devices For Elevators (AREA)
Abstract
The embodiment of the invention discloses an elevator shaft signal transmission device. The device includes: the power line communication module is electrically connected with the elevator car load, and is respectively electrically connected with the power line communication module electrically connected with the first machine room power supply and the camera, and is used for converting the received audio and video signals into power line signals and transmitting the power line signals to the power line communication module electrically connected with the first machine room power supply; the power line communication module is electrically connected with the first machine room power supply, is electrically connected with the power line communication module electrically connected with the second machine room power supply, and is used for switching the power line signals into audio and video signals and transmitting the audio and video signals to the power line communication module electrically connected with the second machine room power supply; and the power line communication module electrically connected with the second machine room power supply is used for feeding back the audio and video signals to the display equipment. The technical scheme of the embodiment of the invention realizes stable and efficient guarantee of signal transmission in the elevator shaft.
Description
Technical Field
The embodiment of the invention relates to the technical field of power line carrier communication, in particular to an elevator shaft signal transmission device and an elevator.
Background
At present, a power line carrier communication (PLC) technology is widely used for transmission of signals such as elevator videos and audios, and the transmission mode can save network cost, is not easy to damage a circuit and is convenient to maintain. However, a lot of interference signals exist in the hoistway line, for example, power frequency commercial power interference is 50Hz, interference caused by a high-frequency switching power supply switching device is 100KHz-1MHz, motor frequency converter IGBT switching interference is 8KHz-20KHz, interference in an elevator door motor switching process is 10KHz-20KHz, and the like.
The bandwidth of the power line carrier communication module is greatly reduced in the process of carrying a cable in a hoistway to transmit signals, the signal transmission in a one-to-many bus mode cannot be met, and the conventional general power line carrier communication module is difficult to filter the interference in the hoistway by a filter circuit.
Disclosure of Invention
The embodiment of the invention provides an elevator shaft signal transmission device and an elevator, which aim to realize stable and efficient guarantee of signal transmission in an elevator shaft.
In a first aspect, an embodiment of the present invention provides an elevator hoistway signal transmission device, including:
the elevator control system comprises an elevator car load, a power line communication module electrically connected with the elevator car load, a first machine room power supply, a power line communication module electrically connected with the first machine room power supply, a second machine room power supply, a power line communication module electrically connected with the second machine room power supply, an elevator external calling module, a power line communication module electrically connected with the elevator external calling module, a camera and a display device;
the power line communication module electrically connected with the elevator car load is respectively electrically connected with the power line communication module electrically connected with the first machine room power supply and the camera, and is used for converting the received audio and video signals into power line signals and transmitting the power line signals to the power line communication module electrically connected with the first machine room power supply;
the power line communication module electrically connected with the first machine room power supply is electrically connected with the power line communication module electrically connected with the second machine room power supply, and is used for switching the power line signals into the audio and video signals and transmitting the audio and video signals to the power line communication module electrically connected with the second machine room power supply;
and the power line communication module electrically connected with the power supply of the second machine room is respectively electrically connected with the power line communication module electrically connected with the elevator calling module and the display equipment and used for feeding back the audio and video signals to the display equipment.
Further, the power line communication module comprises a conversion circuit, a filter circuit, a switching power supply and an isolation unit;
the conversion circuit is electrically connected with the switching power supply, the filter circuit is electrically connected with the isolation module, and the isolation module is electrically connected with the switching power supply.
Furthermore, the network port of the power line communication module is electrically connected with the conversion circuit, the first interface of the power line communication module is electrically connected with the first end of the filter circuit, and the second interface of the power line communication module is electrically connected with the second end of the filter circuit and the isolation unit respectively.
Further, the elevator car load is electrically connected with a first interface of the power line communication module electrically connected with the elevator car load, a second interface of the power line communication module electrically connected with the elevator car load is electrically connected with a second interface of the power line communication module electrically connected with the first machine room power supply, and the first interface of the power line communication module electrically connected with the first machine room power supply is electrically connected with the first machine room power supply;
the network port of the power line communication module electrically connected with the first machine room power supply is electrically connected with the network port of the power line communication module electrically connected with the second machine room power supply, the network port of the power line communication module electrically connected with the elevator car load is electrically connected with the camera, and the network port of the power line communication module electrically connected with the elevator external calling module is electrically connected with the display equipment;
the elevator external calling module is electrically connected with a first interface of a power line communication module electrically connected with the elevator external calling module, a second interface of the power line communication module electrically connected with the elevator external calling module is electrically connected with a second interface of the power line communication module electrically connected with a second machine room power supply, and the first interface of the power line communication module electrically connected with the second machine room power supply is electrically connected with the second machine room power supply.
Furthermore, the conversion circuit comprises a main control chip, a simulator front end, an output filter circuit, an input filter circuit, a coupling transformer and a memory;
the main control chip is respectively electrically connected with the front end of the simulator and the memory, the front end of the simulator is respectively electrically connected with the output filter circuit and the input filter circuit, and the output filter circuit and the input filter circuit are respectively electrically connected with the coupling transformer.
Further, the coupling transformer is electrically connected with the filter circuit and the isolation unit respectively;
and the switching power supply is respectively electrically connected with the main control chip and the front end of the simulator.
Further, the filter circuit comprises a first inductor, a second inductor, a third inductor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor and a power resistor;
the first inductor and the second inductor are connected in parallel at two ends of the first capacitor, the first capacitor is connected in parallel at two ends of the third inductor, the second capacitor and the power resistor are respectively connected in parallel at two ends of the third inductor, and the third capacitor and the fourth capacitor are connected in series and then connected in parallel at two ends of the third inductor.
Further, the first inductor and the second inductor are differential mode inductors, and the third inductor is a common mode inductor;
the first capacitor and the second capacitor are thin film capacitors, and the third capacitor and the fourth capacitor are ceramic capacitors.
Further, the first machine room power supply is electrically connected with the elevator car load through a first cable and used for providing power supply for the elevator car load;
the second machine room power supply is electrically connected with the elevator external calling module through a second cable and used for providing power for the elevator external calling module;
and the power line communication module electrically connected with the first machine room power supply is electrically connected with the power line communication module electrically connected with the second machine room power supply through a network cable.
In a second aspect, embodiments of the present invention further provide an elevator, which includes the elevator shaft signal transmission device provided in embodiments of the first aspect of the present invention.
According to the technical scheme of the embodiment of the invention, the elevator shaft signal transmission device comprises: the elevator control system comprises an elevator car load, a power line communication module electrically connected with the elevator car load, a first machine room power supply, a power line communication module electrically connected with the first machine room power supply, a second machine room power supply, a power line communication module electrically connected with the second machine room power supply, an elevator external calling module, a power line communication module electrically connected with the elevator external calling module, a camera and a display device; the power line communication module electrically connected with the elevator car load is respectively connected with the power line communication module electrically connected with the first machine room power supply and the camera, and is used for converting the received audio and video signals into power line signals and transmitting the power line signals to the power line communication module electrically connected with the first machine room power supply; the power line communication module electrically connected with the first machine room power supply is electrically connected with the power line communication module electrically connected with the second machine room power supply, and is used for switching the power line signals into the audio and video signals and transmitting the audio and video signals to the power line communication module electrically connected with the second machine room power supply; and the power line communication module electrically connected with the power supply of the second machine room is respectively electrically connected with the power line communication module electrically connected with the elevator calling module and the display equipment and used for feeding back the audio and video signals to the display equipment. The problems of difficult filtering of signal interference and poor signal transmission stability in the shaft in the prior art are solved, and the signal transmission in the elevator shaft is stably and efficiently ensured.
Drawings
Fig. 1 is a schematic structural diagram of an elevator shaft signal transmission device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a power line communication module according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a filter circuit according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention are described in further detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention.
It should be further noted that, for the convenience of description, only some but not all of the relevant aspects of the present invention are shown in the drawings. Before discussing exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although a flowchart may describe the operations (or steps) as a sequential process, many of the operations can be performed in parallel, concurrently or simultaneously. In addition, the order of the operations may be re-arranged. The process may be terminated when its operations are completed, but may have additional steps not included in the figure. The processes may correspond to methods, functions, procedures, subroutines, and the like.
Fig. 1 is a schematic structural diagram of an elevator hoistway signal transmission device according to an embodiment of the present invention, which is applicable to a case where audio/video signals are transmitted in an elevator hoistway.
The specific structure of the elevator hoistway signal transmission device comprises the following components:
the elevator system comprises an elevator car load 110, a power line communication module 120 electrically connected with the elevator car load, a first machine room power supply 130, a power line communication module 120 electrically connected with the first machine room power supply, a second machine room power supply 140, a power line communication module 120 electrically connected with the second machine room power supply, an elevator external calling module 150, a power line communication module 120 electrically connected with the elevator external calling module, a camera and a display device;
the power line communication module 120 electrically connected with the elevator car load 110 is electrically connected with the power line communication module 120 and the camera electrically connected with the first machine room power supply 130, and is used for converting the received audio and video signals into power line signals and transmitting the power line signals to the power line communication module 120 electrically connected with the first machine room power supply 130;
the power line communication module 120 electrically connected with the first machine room power supply 130 is electrically connected with the power line communication module 120 electrically connected with the second machine room power supply 140, and is configured to switch the power line signal into the audio/video signal and transmit the audio/video signal to the power line communication module 120 electrically connected with the second machine room power supply 140;
the power line communication module 120 electrically connected to the second machine room power supply 140 is electrically connected to the power line communication module 120 and the display device electrically connected to the elevator calling module 150, respectively, and is configured to feed back the audio and video signals to the display device.
The elevator car load 110 may be a door machine, a button, a sensor, an intercom, etc. in the car.
The camera can be any device capable of realizing video or image shooting in the prior art, such as an infrared camera or a high-definition camera, and the embodiment does not limit the specific type of the camera.
The elevator calling module 150 displays the floor where the elevator runs currently and the calling button for going up and down the floor when taking the elevator, and is arranged on the external calling part of each floor where the elevator can stay, the number of the external calling parts specifically included in the elevator calling module 150 is determined by the actual floor of the building where the elevator is located, and the embodiment only explains the specific functions of the elevator calling module 150 without any limitation on the number or other specific form contents.
The display device may be integrated within the call-out module 150 or may be independent of the call-out module 150 (i.e., as shown in fig. 1). In this embodiment, the specific type of the display device is not limited at all, and may be any device that implements an image or video display function in the prior art, and the display device has a network port that can be used by a network cable, for example, a display screen, a camera, and other devices.
Specifically, one end of the power line communication module 120 in the elevator car is connected to the elevator car load 110, the power line communication module 120 in the elevator car is configured to convert an ethernet signal into a power line signal, the other end of the power line communication module carries a direct current cable (optionally, the direct current cable may be 24V or 48V) in the hoistway to transmit an audio/video signal into the machine room, the direct current cable of the power line communication module 120 in the machine room carrying a power supply of the machine room transmits the audio/video signal to the elevator external calling module 150, that is, the external calling part of each floor corresponding to the elevator external calling module 150, and the power line communication module 120 in the machine room is configured to convert the power line signal into the ethernet signal.
Further, the elevator calling part of each floor can comprise a display device, and the display device can be used for displaying monitoring information in the elevator car at any time. Meanwhile, people waiting outside the hall can know the internal condition of the car at any time through the display equipment. However, the monitoring information in the car is simultaneously obtained by the multi-layer external call in a bus mode, which is equivalent to that the fixed bandwidth data is distributed to a plurality of floors, and the data bandwidth obtained by each floor is relatively small, which causes video delay, blocking or disconnection.
With continued reference to fig. 1, based on the above embodiment, the first machine room power source 130 is electrically connected to the elevator car load 110 via a first cable for providing power to the elevator car load 110;
the second machine room power supply 140 is electrically connected to the elevator calling module 150 through a second cable, and is configured to provide power to the elevator calling module 150;
the power line communication module 120 electrically connected to the first room power supply 130 is electrically connected to the power line communication module 120 electrically connected to the second room power supply 140 through a network cable.
Specifically, the power supply in the machine room is divided into two paths, the first machine room power supply 130 enters the elevator car through a first cable for the use of the elevator car load 110 in the elevator car, and the second machine room power supply 140 enters the elevator external calling module 150 through a second cable, namely enters each floor for the use of the external calling part.
No matter the first cable channel or the second cable channel, the signal is transmitted between the conversion module parts of the two plc modules 120, and the two plc modules 120 always filter the external interference outside the transmission line through their respective low pass filters, thereby ensuring the relative cleanness of the transmission line signal.
The high frequency interference signals on the first machine room power supply 130 in the machine room are mostly filtered after passing through the low pass filter of the power line communication module 120 electrically connected with the first machine room power supply 130, and the interference signals in the car are also filtered after passing through the low pass filter of the power line communication module 120 electrically connected with the elevator car load 110, so that the line between the two conversion modules can keep the signals relatively clean. The signal transmitted by the power line communication module 120 can be less interfered by the outside, and the signal can be stably and efficiently transmitted. In the same way, in the second cable, the low pass filters of the power line communication module 120 electrically connected to the second machine room power supply 140 and the power line communication module 120 electrically connected to the elevator calling module 150 respectively filter the interference signals of the second machine room power supply 140 and the calling board outside the transmission channel of the second cable, so that it is ensured that the signal transmission of the second cable is relatively clean, thus the whole transmission channel can transmit both electric energy and signals, and it is ensured that the whole transmission path channel signals are relatively clean.
Fig. 2 is a schematic structural diagram of a power line communication module 120 according to an embodiment of the present invention. Referring to fig. 2, on the basis of the above embodiment, the power line communication module 120 includes a conversion circuit 121, a filter circuit 122, a switching power supply 123, and an isolation unit 124;
the conversion circuit 121 is electrically connected to the switching power supply 123, the filter circuit 122 is electrically connected to the isolation module, and the isolation module is electrically connected to the switching power supply 123.
Specifically, the conversion circuit 121, the filter circuit 122, the switching power supply 123 and the isolation unit 124 included in the power line communication module 120 are all electrically connected through a power line, and the power line may be used for transmitting power energy and may also be used for transmitting signals.
The filter circuit 122 may employ a low-pass filter, which mainly suppresses external interference and prevents crosstalk from affecting transmission of the power line signal.
The isolation unit 124 is mainly used to suppress interference generated by the switching power supply 123.
With continued reference to fig. 2, based on the above embodiment, the network port of the power line communication module 120 is electrically connected to the conversion circuit 121, the first interface of the power line communication module 120 is electrically connected to the first end of the filter circuit 122, and the second interface of the power line communication module 120 is electrically connected to the second end of the filter circuit 122 and the isolation unit 124, respectively.
With continued reference to fig. 1 and 2, based on the above embodiment, the elevator car load 110 is electrically connected to the first interface of the power line communication module 120 electrically connected to the elevator car load 110, the second interface of the power line communication module 120 electrically connected to the elevator car load 110 is electrically connected to the second interface of the power line communication module 120 electrically connected to the first machine room power supply 130, and the first interface of the power line communication module 120 electrically connected to the first machine room power supply 130 is electrically connected to the first machine room power supply 130;
the network port of the power line communication module 120 electrically connected with the first machine room power supply 130 is electrically connected with the network port of the power line communication module 120 electrically connected with the second machine room power supply 140, the network port of the power line communication module electrically connected with the elevator car load is electrically connected with the camera, and the network port of the power line communication module electrically connected with the elevator calling module is electrically connected with the display device;
the elevator external calling module 150 is electrically connected to the first interface of the power line communication module 120 electrically connected to the elevator external calling module 150, the second interface of the power line communication module 120 electrically connected to the elevator external calling module 150 is electrically connected to the second interface of the power line communication module 120 electrically connected to the second machine room power supply 140, and the first interface of the power line communication module 120 electrically connected to the second machine room power supply 140 is electrically connected to the second machine room power supply 140.
With continued reference to fig. 2, on the basis of the foregoing embodiment, the conversion circuit 121 includes a main control chip, an emulator front end, an output filter circuit, an input filter circuit, a coupling transformer, and a memory;
the main control chip is respectively electrically connected with the front end of the simulator and the memory, the front end of the simulator is respectively electrically connected with the output filter circuit and the input filter circuit, and the output filter circuit 122 and the input filter circuit are respectively electrically connected with the coupling transformer.
With continued reference to fig. 2, on the basis of the above embodiment, the coupling transformer is electrically connected to the filter circuit 122 and the isolation unit 124, respectively;
the switching power supply 123 is electrically connected with the main control chip and the front end of the simulator respectively.
Specifically, the conversion circuit 121 of the power line transmission module is connected to the elevator car load 110 and the network port of the power line communication module 120 electrically connected to the elevator car load 110, and transmits the audio/video signal to the main control chip, the main control chip transmits the audio/video signal to the front end of the simulator through digital/analog transmission, and the audio/video signal is amplified at the front end of the simulator and filtered by the output filter circuit and coupled to the power line through the coupling transformer to realize signal conversion and transmission. The high-frequency signal loaded on the power cable is coupled to the input filter circuit by the coupling transformer at the receiving end, transmitted to the main control chip through the front end of the simulator and analog-to-digital conversion, and transmitted to the display module of the elevator calling module 150 through the network interface.
The memory is mainly used for storing programs, and the main control chip starts the programs in the memory to continuously realize the conversion of Ethernet signals and power line carrier signals after the elevator shaft signal transmission device is powered on. Furthermore, the isolation capacitors C1 and C2 adopt high voltage-resistant ceramic chip capacitors to isolate the power supply, so as to prevent the coupling transformer from being damaged by external high voltage.
Fig. 3 is a schematic structural diagram of a filter circuit according to an embodiment of the present invention. Referring to fig. 3, on the basis of the above embodiment, the filter circuit 122 includes a first inductor, a second inductor, a third inductor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, and a power resistor;
the first inductor and the second inductor are connected in parallel at two ends of the first capacitor, the first capacitor is connected in parallel at two ends of the third inductor, the second capacitor and the power resistor are respectively connected in parallel at two ends of the third inductor, and the third capacitor and the fourth capacitor are connected in series and then connected in parallel at two ends of the third inductor.
Specifically, the filter circuit 122 uses the low-pass LC filter circuit 122 as a basic architecture, and the multistage filter circuit 122 ensures that the dc signal and the low-frequency signal component in the cable can smoothly pass through the cable, while the high-frequency signal outside the power line communication module 120 is blocked outside the transmission cable.
On the basis of the above embodiment, the first inductor and the second inductor are differential mode inductors, and the third inductor is a common mode inductor;
the first capacitor and the second capacitor are thin film capacitors, and the third capacitor and the fourth capacitor are ceramic capacitors.
Specifically, the thin film capacitor and the ceramic capacitor are all safety capacitors, and the first capacitor, the second capacitor, the third capacitor and the fourth capacitor are all safety capacitors.
In the present embodiment, the third inductor L3, the third capacitor C3, and the fourth capacitor C4 form a common mode LC filter circuit 122, which mainly filters a common mode ground interference signal in a line; the first inductor L1, the second inductor L2, the first capacitor C1 and the second capacitor C2 form a differential mode LC filter circuit 122, and differential mode signals between the positive electrode and the negative electrode of a 24V (or 48V) power supply are filtered; the pi-type filter circuit 122 formed by the first capacitor C1, the third inductor L3 and the second capacitor C2 can better suppress noise on the power supply side.
The resistance value of the power resistor should be as large as possible, and the main function is to discharge and consume the electric energy stored in the inductor and the capacitor after the circuit is powered off, so as to prevent the electric energy from being charged on the board after the system is powered off, the low-pass filter circuit 122 is integrated on the power line communication module 120, and the low-pass filter circuit 122 isolates the external interference outside the conversion circuit 121.
The embodiment of the invention also provides an elevator, which comprises the elevator shaft signal transmission device provided by the embodiment of the invention.
According to the technical scheme of the embodiment of the invention, the elevator shaft signal transmission device comprises: the elevator control system comprises an elevator car load, a power line communication module electrically connected with the elevator car load, a first machine room power supply, a power line communication module electrically connected with the first machine room power supply, a second machine room power supply, a power line communication module electrically connected with the second machine room power supply, an elevator external calling module, a power line communication module electrically connected with the elevator external calling module, a camera and a display device; the power line communication module electrically connected with the elevator car load is respectively electrically connected with the power line communication module electrically connected with the first machine room power supply and the camera, and is used for converting the received audio and video signals into power line signals and transmitting the power line signals to the power line communication module electrically connected with the first machine room power supply; the power line communication module electrically connected with the first machine room power supply is electrically connected with the power line communication module electrically connected with the second machine room power supply, and is used for switching the power line signals into the audio and video signals and transmitting the audio and video signals to the power line communication module electrically connected with the second machine room power supply; and the power line communication module electrically connected with the power supply of the second machine room is respectively electrically connected with the power line communication module electrically connected with the elevator calling module and the display equipment and used for feeding back the audio and video signals to the display equipment. The problems of difficult filtering of signal interference and poor signal transmission stability in the shaft in the prior art are solved, and the signal transmission in the elevator shaft is stably and efficiently ensured.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. An elevator hoistway signal transmission apparatus, comprising:
the elevator control system comprises an elevator car load, a power line communication module electrically connected with the elevator car load, a first machine room power supply, a power line communication module electrically connected with the first machine room power supply, a second machine room power supply, a power line communication module electrically connected with the second machine room power supply, an elevator external calling module, a power line communication module electrically connected with the elevator external calling module, a camera and a display device;
the power line communication module electrically connected with the elevator car load is respectively electrically connected with the power line communication module electrically connected with the first machine room power supply and the camera, and is used for converting the received audio and video signals into power line signals and transmitting the power line signals to the power line communication module electrically connected with the first machine room power supply;
the power line communication module electrically connected with the first machine room power supply is electrically connected with the power line communication module electrically connected with the second machine room power supply, and is used for switching the power line signals into the audio and video signals and transmitting the audio and video signals to the power line communication module electrically connected with the second machine room power supply;
and the power line communication module electrically connected with the power supply of the second machine room is respectively electrically connected with the power line communication module electrically connected with the elevator calling module and the display equipment and used for feeding back the audio and video signals to the display equipment.
2. The elevator hoistway signal transmission apparatus of claim 1, wherein the power line communication module comprises a conversion circuit, a filter circuit, a switching power supply, and an isolation unit;
the conversion circuit is electrically connected with the switching power supply, the filter circuit is electrically connected with the isolation module, and the isolation module is electrically connected with the switching power supply.
3. The hoistway signal transmission apparatus according to claim 2, wherein the network port of the power line communication module is electrically connected to a switching circuit, the first interface of the power line communication module is electrically connected to the first end of the filter circuit, and the second interface of the power line communication module is electrically connected to the second end of the filter circuit and the isolation unit, respectively.
4. The elevator hoistway signal transmission apparatus of claim 3, wherein the elevator car load is electrically connected to a first interface of the power line communication module electrically connected to the elevator car load, a second interface of the power line communication module electrically connected to the elevator car load is electrically connected to a second interface of the power line communication module electrically connected to the first machine room power supply, and the first interface of the power line communication module electrically connected to the first machine room power supply is electrically connected to the first machine room power supply;
the network port of the power line communication module electrically connected with the first machine room power supply is electrically connected with the network port of the power line communication module electrically connected with the second machine room power supply, the network port of the power line communication module electrically connected with the elevator car load is electrically connected with the camera, and the network port of the power line communication module electrically connected with the elevator external calling module is electrically connected with the display equipment;
the elevator external calling module is electrically connected with a first interface of a power line communication module electrically connected with the elevator external calling module, a second interface of the power line communication module electrically connected with the elevator external calling module is electrically connected with a second interface of the power line communication module electrically connected with a second machine room power supply, and the first interface of the power line communication module electrically connected with the second machine room power supply is electrically connected with the second machine room power supply.
5. The hoistway signal transmission apparatus of claim 2, wherein the conversion circuit comprises a main control chip, a simulator front end, an output filter circuit, an input filter circuit, a coupling transformer, and a memory;
the main control chip is respectively electrically connected with the front end of the simulator and the memory, the front end of the simulator is respectively electrically connected with the output filter circuit and the input filter circuit, and the output filter circuit and the input filter circuit are respectively electrically connected with the coupling transformer.
6. The hoistway signal transmission apparatus of claim 5, wherein the coupling transformer is electrically connected to the filter circuit and the isolation unit, respectively;
and the switching power supply is respectively electrically connected with the main control chip and the front end of the simulator.
7. The hoistway signal transmission apparatus of claim 2, wherein the filter circuit comprises a first inductor, a second inductor, a third inductor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, and a power resistor;
the first inductor and the second inductor are connected in parallel at two ends of the first capacitor, the first capacitor is connected in parallel at two ends of the third inductor, the second capacitor and the power resistor are respectively connected in parallel at two ends of the third inductor, and the third capacitor and the fourth capacitor are connected in series and then connected in parallel at two ends of the third inductor.
8. The hoistway signal transmission apparatus of claim 7, wherein the first and second inductors are differential mode inductors and the third inductor is a common mode inductor;
the first capacitor and the second capacitor are thin film capacitors, and the third capacitor and the fourth capacitor are ceramic capacitors.
9. The elevator hoistway signal transmission apparatus of claim 1, wherein the first machine room power source is electrically connected to the elevator car load by a first cable for providing power to the elevator car load;
the second machine room power supply is electrically connected with the elevator external calling module through a second cable and used for providing power for the elevator external calling module;
and the power line communication module electrically connected with the first machine room power supply is electrically connected with the power line communication module electrically connected with the second machine room power supply through a network cable.
10. An elevator characterized by comprising the elevator shaft signal transmission device according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011157249.5A CN112299169B (en) | 2020-10-26 | 2020-10-26 | Elevator well signal transmission device and elevator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011157249.5A CN112299169B (en) | 2020-10-26 | 2020-10-26 | Elevator well signal transmission device and elevator |
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| Publication Number | Publication Date |
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| CN112299169A true CN112299169A (en) | 2021-02-02 |
| CN112299169B CN112299169B (en) | 2023-02-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011157249.5A Active CN112299169B (en) | 2020-10-26 | 2020-10-26 | Elevator well signal transmission device and elevator |
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