Prompting device for proper parking position of elevator car

Abstract

The utility model relates to an elevator car proper parking position reminding device which comprises a main control module, a car position detection module, a floor LED display module, a voice reminding module and an elevator ascending and descending, speed and original point detection module. The detection module comprises three pieces of magnetic steel, three Hall sensors and a signal acquisition module, the three pieces of magnetic steel are installed on the periphery of the tensioning wheel, and the three Hall sensors directly face the circumference where the three pieces of magnetic steel are located so as to obtain the running direction, speed and original point signals; the lift car position detection module comprises a photoelectric sensor and two reflective mirror plates, the two reflective mirror plates are installed on lift car guide rails on the upper side and the lower side of the leveling switch respectively, and the photoelectric sensor is installed on an elevator lift car to obtain lift car position signals; the language reminding module is installed on an elevator car, and the floor LED display module is installed on a panel outside a floor hall door. The device can perform acousto-optic reminding when the elevator car reaches a position with a set distance from the sill surface of the maintenance floor, so that the convenience and safety of elevator maintenance are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to elevator maintenance technical field, concretely relates to a kind of elevator car suitable stop position reminding device. BACKGROUND

[0002] When elevator is maintained or serviced, it is often needed to operate on the top of elevator car. When on the top of car, the position of car on the floor of maintenance is needed to be known. For the elevator running at normal speed, the position of car on the floor of maintenance is not determined, and the position is needed to be observed by using triangular lock to open hall door. When opening hall door, the car can be too high or too low from the threshold of maintenance floor, and it is not easy to enter the top of car. At this time, the elevator needs to be restarted, and it is determined whether the elevator reaches the position of ±500mm from the threshold of maintenance floor according to experience, and then the hall door can be opened to enter the car for maintenance operation. SUMMARY

[0003] The utility model aims at providing a kind of elevator car suitable stop position reminding device, the device can carry out sound and light reminding when elevator car reaches the position of set distance from the threshold of maintenance floor, so as to improve the convenience and safety of elevator maintenance.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the technical scheme of: a kind of elevator car suitable stop position reminding device, including main control module, car position detection module, floor LED display module, voice reminding module and elevator up and down, speed and original point detection module;The elevator up and down, speed and original point detection module includes three magnetic steels, three hall sensors and signal acquisition module, the three magnetic steels are installed in the tightener peripheral of elevator pit along the circumference, the three hall sensors are arranged on the side of tightener and opposite to the circumference of three magnetic steels, to obtain up and down running direction signal, speed signal and original point signal by detecting the magnetic field change caused by the rotation of three magnetic steels with tightener, the three hall sensors are electrically connected with main control module through signal acquisition module;The car position detection module includes photoelectric sensor and two mirror plates, the two mirror plates are installed on the car guide rail on the upper and lower sides of level switch respectively, the photoelectric sensor is installed on the elevator car, to obtain car position signal when photoelectric sensor passes through mirror plate, the photoelectric sensor is electrically connected with main control module;The voice reminding module is installed on the elevator car, the floor LED display module is installed on the floor panel outside the floor hall door, the voice reminding module and floor LED display module are electrically connected with main control module, to carry out sound and light alarm when photoelectric sensor detects that car reaches set position.

[0005] Further, the main control module is a master station, the floor LED display module and the voice reminding module are slave stations, and the main control module communicates with the floor LED display module and the voice reminding module through a 485 communication mode.

[0006] Further, the main control module adopts an STC12C5A60S2 single-chip microcomputer as a main control chip.

[0007] Further, the signal acquisition module adopts a 74HC14 high-speed 6-way Schmitt trigger inverter, three input ports of the signal acquisition module are connected with three Hall sensors respectively, and three output ports of the signal acquisition module are connected with P0.0, P0.1 and P0.2 ports of the STC12C5A60S2 single-chip microcomputer.

[0008] Further, the Hall sensor adopts a 3144 chip.

[0009] Further, the two reflector plates are respectively located at positions 500 mm away from upper and lower parts of the landing switch, so as to trigger the photoelectric sensor when the car reaches the sill ± 500 mm.

[0010] Further, the photoelectric sensor adopts a retro-reflective photoelectric sensor CX-483.

[0011] Further, the car position detection module includes 2n reflector plates, n is an integer greater than 0, the n floor LED display modules are respectively installed on floor panels outside n floor hall doors, and the 2n reflector plates are respectively installed on the car guide rails on the upper and lower sides of the landing switches of the n floors, so as to light up the LED display module of the corresponding floor when the photoelectric sensor detects a signal at the corresponding floor.

[0012] Further, the voice reminding module adopts an ETV001-485TTS voice broadcaster.

[0013] Further, a voltage reduction and stabilization circuit is included, the voltage reduction and stabilization circuit is connected with an external power supply and performs voltage reduction and stabilization to supply power to the entire device.

[0014] Compared with the prior art, the elevator car suitable stopping position reminding device has the following beneficial effects: the device can judge the elevator car to reach the optimal position of ±500mm of the maintenance floor sill surface, and sound, light and voice reminding and LED display are performed to inform the maintenance personnel that the hall door can be opened and the car roof can be operated at this moment. The device not only enables experienced maintenance personnel to quickly open the maintenance floor hall door according to the device prompt during maintenance, but also enables unskilled maintenance personnel to correctly judge the position of the elevator car at the maintenance floor, avoids the danger of falling into the elevator shaft after the hall door is opened due to a large position judgment error, and thus guarantees the safety and maintenance efficiency of the maintenance personnel. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a circuit diagram of the elevator car suitable stopping position reminding device of the utility model embodiment;

[0016] Figure 2 is a mounting state schematic view of three magnetic steels in the utility model embodiment;

[0017] Figure 3 is a structure schematic view of the car position detection module in the utility model embodiment;

[0018] Figure 4 is a mounting state schematic view of two reflector plates in the utility model embodiment;

[0019] Figure 5 is a circuit diagram of the photoelectric sensor and the voice reminding module in the utility model embodiment;

[0020] Figure 6 is a circuit diagram of the floor LED display module in the utility model embodiment;

[0021] Figure 7 is a circuit diagram of the voltage reduction and stabilization circuit in the utility model embodiment.

[0022] In the drawing: 1-tensioning wheel; 2-car guide rail; 3-speed limiter; 4-machine room mounting bottom plate; 5-photoelectric sensor; 6-reflector plate; 7-leveling switch; B1-magnetic steel; B2-magnetic steel; B3-magnetic steel; DETAILED DESCRIPTION

[0023] The utility model will be further described below in combination with the drawings and embodiments.

[0024] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as generally understood by those skilled in the art to which the present application belongs.

[0025] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0026] The embodiment provides an elevator car suitable stopping position reminding device, including main control module, car position detection module, floor LED display module, voice reminding module and elevator up and down, speed and origin detection module; the elevator up and down, speed and origin detection module includes three magnetic steel (B1, B2, B3), three hall sensors and signal acquisition module, the three magnetic steel B1, B2, B3 are installed along the circumference in the tight wheel 1 of elevator pit, the three hall sensors are set to the tight wheel 1 side and the circumference of three magnetic steel, to obtain up and down running direction signal, speed signal and origin signal by detecting the magnetic field change caused by the rotation of three magnetic steel with tight wheel, the three hall sensors are electrically connected with main control module through signal acquisition module; the car position detection module includes photoelectric sensor 5 and two mirror plates 6, the two mirror plates 6 are installed on the car guide rail 2 on the upper and lower sides of the leveling switch 7, the photoelectric sensor 5 is installed on the elevator car, to obtain the car position signal when the photoelectric sensor passes through the mirror plate, the photoelectric sensor is electrically connected with main control module; the voice reminding module is installed on the elevator car, the floor LED display module is installed on the floor panel outside the floor hall door, the voice reminding module and floor LED display module are electrically connected with main control module, to carry out sound and light alarm when the photoelectric sensor detects that the car reaches the set position.

[0027] The main control module adopts STC12C5A60S2 single-chip microcomputer as the main control chip.

[0028] The main control module adopts STC12C5A60S2 single-chip microcomputer as the main control chip.

[0029] The functions of the pins of the STC12C5A60S2 single-chip microcomputer are as follows:

[0030] 1, VCC (40 pin): power supply

[0031] 2, GND (20 pin): ground

[0032] 3. P0.0 - P0.7 (pins 39-32): P0 port is an open-drain bidirectional I / O port, which can be used as input / output port or address / data bus. When accessing external memory, it is time-multiplexed address (lower 8 bits) and data bus, with internal pull-up resistors activated during access.

[0033] 4. P1.0 - P1.7 (pins 1-8): P1 port is an 8-bit bidirectional standard I / O port with internal pull-up resistors. During EPROM programming and program verification, it receives the lower 8 bits of address. P1.0 is the clock output of the independent baud rate generator, P1.2 is the serial port data receive terminal, P1.3 is the serial port data transmit terminal, P1.4 is the slave select signal of the SPI synchronous serial interface, P1.5 is the master out slave in (input of the master device and output of the slave device) of the SPI synchronous serial interface, P1.6 is the master in slave out of the SPI synchronous serial interface.

[0034] 5. P2.0 - P2.7 (pins 21-28): P2 port is an 8-bit bidirectional I / O port with internal pull-up resistors, which can also be used as high 8 bits of address bus. When accessing external memory, it sends out the high 8 bits of address. During programming and program verification of EFROM, it receives the high 8 bits of address.

[0035] 6. P3.0 - P3.7 (pins 10-17): P3 port is an 8-bit bidirectional standard I / O port with internal pull-up resistors. P3.0 is the serial port 1 data receive terminal, P3.1 is external interrupt 0, P3.3 and P3.4 are timer counter 0 external input, timer 0 falling edge interrupt, and clock output of timer counter 0.

[0036] 7. Pin 19: XTAL1 - input terminal of internal clock circuit inverting amplifier, connected to one pin of external crystal oscillator.

[0037] 8. Pin 18: XTAL2 - output terminal of internal clock circuit inverting amplifier, connected to one pin of external crystal oscillator.

[0038] 9. Pin 9: RST - reset pin, to which a reset pulse of a certain width is applied from the external reset circuit to reset the single-chip microcomputer.

[0039] In the device, the main control module serves as the master station, mainly collecting the uplink and downlink running direction, speed, and origin signal of the elevator. The origin is used to detect the initial position of the elevator. The floor LED display module and the voice reminding module serve as the slave station, and the main function is to sound and light at the threshold ± 500 mm of the hall door when the elevator arrives. The slave station and the master station are connected and communicate through 485 serial communication, and the communication protocol mode is Modbus RTU.

[0040] , Elevator up and down, speed and origin detection module

[0041] The elevator up and down, speed and origin detection module uses Hall sensors to detect the running direction, speed and position of the elevator by detecting the change of the magnetic field, to ensure the reliability and real-time of the detection data when the elevator is running. The Hall sensor is through the Hall effect: when the current is perpendicular to the magnetic field direction through the conductor, it will produce a potential difference on both sides of the conductor. The Hall sensor uses this effect to convert the change of the magnetic field into an electrical signal. As shown in Figure 2 , when the rotating part (tensioner) of the elevator is installed with a magnetic steel, the Hall sensor detects the periodic change of the magnetic field generated when it rotates, and outputs a pulse signal. The collected pulse signal is connected to the P0.0, P0.1, P0.2 ports of the STC12C5A60S2 single-chip microcomputer, and through the analysis and processing of the single-chip microcomputer, the running direction, running speed and floor position of the elevator can be determined.

[0042] In this embodiment, three magnetic steels B1, B2, B3 are installed in sequence along the circumference on the tensioner 1 of the elevator pit, and the installation positions of the three B1, B2, B3 are different by 90° along the circumference.

[0043] Signal characteristics:

[0044] - The output signal of each Hall element is a square wave pulse.

[0045] - The signals of the three Hall elements (A1, A2, A3) have a certain phase difference in time, and the size of the phase difference is related to the speed of the elevator and the distance between the Hall elements.

[0046] - The running direction of the elevator (up or down) can be determined by the sequence of the signals.

[0047] - The origin position is represented by a high-level pulse.

[0048] - Three magnetic steels are installed on the tensioner of the elevator pit, and when the elevator moves, the tensioner rotates, and the magnetic steels pass through the three Hall elements in sequence, triggering them to output pulse signals.

[0049] - By analyzing the sequence, phase difference and frequency of the signals of the three Hall elements, the running direction, speed and origin position of the elevator can be determined.

[0050] - Upward state:

[0051] - The magnetic steel passes through A1, A2, A3 in sequence, so the sequence of the signals is A1→A2→A3.

[0052] - The gradually increasing frequency of the signals indicates that the elevator is accelerating upward, the stable frequency indicates uniform upward, and the gradually decreasing frequency indicates decelerating upward.

[0053] - Downlink status:

[0054] - The magnet passes through A3, A2, and A1 in sequence, so the signal sequence is A3→A2→A1.

[0055] - A gradually increasing frequency of the signal indicates that the elevator is accelerating downwards, a stable frequency indicates a constant downward speed, and a gradually decreasing frequency indicates deceleration downwards.

[0056] - Origin point location:

[0057] - When the magnet passes A2, A2 outputs a specific pulse signal (such as a high level), indicating that the elevator has reached the origin position.

[0058] (1) Hall sensor

[0059] In this embodiment, the Hall sensor uses a 3144 chip.

[0060] The specifications of the 3144 chip are as follows:

[0061] 1) Operating voltage: 4.5V-24V, generally using 5V or 12V DC power supply.

[0062] 2) When the sensor detects a magnetic field, the digital output is low; if no magnetic field is detected, the digital output is high.

[0063] 3) Output voltage: 0V-24V, depending on the resistance and supply voltage in the circuit.

[0064] 4) Output current: less than 10mA, depending on the resistance and supply voltage in the circuit.

[0065] The 3144 chip includes three pins: a power supply pin, a ground pin, and a digital output pin. Their functions and connection methods are as follows:

[0066] 1. Power supply pin: Used to power the sensor, for example, a 5V DC voltage can be used.

[0067] 2. Grounding pin: Used to provide grounding for the sensor.

[0068] 3. Digital output pin: Used to output the detected magnetic field signal.

[0069] (2) Signal acquisition module

[0070] In the embodiment, the signal acquisition module adopts 74HC14 high-speed 6-way Schmitt trigger inverter. The 74HC14 chip is a high-speed silicon CMOS integrated circuit, which mainly provides six inverting buffers, each with Schmitt trigger function. The function of the Schmitt trigger is to convert the slowly changing input signal into a clear and non-jitter output signal, which is very important for signal processing and transmission.

[0071] The three-way input port of the 74HC14 high-speed 6-way Schmitt trigger inverter is connected with the three Hall sensors, and the three-way output port is connected with the P0.0, P0.1 and P0.2 ports of the STC12C5A60S2 single-chip microcomputer.

[0072] The specification parameters of the 74HC14 chip are as follows:

[0073] 1) Power supply voltage: 5.0V

[0074] 2) Operating voltage range: 2.0V-6.0V

[0075] 3) Positive input threshold voltage: VT+ = 1.6V

[0076] 4) Negative input threshold voltage: VT- = 0.8V

[0077] 5) Drive current: + / -5.2mA (6V); + / -4mA (5V); + / -20uA (2V)

[0078] 6) Transmission delay: 12ns

[0079] 7) Logic level: CMOS level

[0080] 3. Car position detection module

[0081] As shown in Figure 3 , the car position detection module includes a photoelectric sensor 5 and two mirror plates 6. The photoelectric sensor 5 is installed on the top of the elevator car. As shown in Figure 4 , the two mirror plates 6 are respectively located at a position 500mm away from the upper part of the landing switch 7 and a position 500mm away from the lower part of the landing switch 7, so as to trigger the photoelectric sensor when the car reaches the hall door sill ±500mm.

[0082] In the embodiment, the photoelectric sensor 5 adopts a retro-reflective photoelectric sensor CX-483. The implementation circuit diagram of the CX-483 photoelectric sensor is as shown in Figure 5 .

[0083] The specification parameters of the CX483 photoelectric sensor are as follows:

[0084] 1) Power supply voltage: 10-30V DC

[0085] 2) Output type: NPN (leak type)

[0086] 3) Output current: ≤100mA (need external load)

[0087] 4) Response time: less than 1ms

[0088] 5) Detection distance: 5-30mm

[0089] 6) Protection function: reverse connection protection, short circuit protection

[0090] 7) Ambient temperature: -25℃~+55℃

[0091] 4. Floor LED display module

[0092] The floor LED display module is used for lighting LED lamp according to the car floor position ±500mm signal detected by the photoelectric sensor, prompting the maintenance personnel to manually open the hall door at this time with the elevator triangular key. The floor LED display module is connected with the 485 serial port of the master control chip STC12C5A60S2 single-chip microcomputer as a slave station, and supports Modbus RTU communication protocol. The implementation circuit diagram of the floor LED display module is shown in Figure 6 .

[0093] The specification parameters of the floor LED display module are as follows:

[0094] 1) Module size: 72mm*26mm*17mm

[0095] 2) Communication standard: RS485

[0096] 3) Master control chip: STM32F030F4

[0097] 4) Communication protocol: Modbus

[0098] 5) Interface resources:

RS485 interface

TTL communication interface

[0099] In the embodiment, the device includes n floor LED display modules, and the car position detection module includes 2n reflector plates, n is an integer greater than 0, the n floor LED display modules are respectively installed on the floor panels outside the n floor hall doors, and the 2n reflector plates are respectively installed on the car guide rails on the upper and lower sides of the n floor landing switches, so that when the photoelectric sensor detects a signal at the corresponding floor, the LED display module of the corresponding floor is lit.

[0100] , voice reminding module

[0101] In the embodiment, the voice reminding module adopts ETV001-485TTS voice broadcaster, is connected with the master control chip through RS485 communication interface, and realizes elevator floor number broadcasting.

[0102] The voice reminding module supports simple private protocol and RTU instruction, and is provided with a relay extension switch. The biggest advantage of the module is that the voice broadcasting content can be flexibly outputted without content limitation, and the module can be connected with third party configuration software, PLC or single-chip microcomputer.

[0103] The specification parameters of the voice reminding module are as follows:

[0104] 1) 485 interface parameters: 9600 8 N 1

[0105] 2) Power supply: 9-26VDC

[0106] 3) External speaker: 8 ohms 5W

[0107] 4) Relay: one way normally open, supporting AC (maximum 250V, 10A), DC (maximum 28V, 10A)

[0108] 5) Data protocol: supporting simple private protocol and MODBUS RTU standard protocol (can be set)

[0109] 6) Encoding format: supporting GB2312, Unicode, BIG5, and GBK, which can be set.

[0110] , voltage reduction and voltage stabilization circuit

[0111] As shown in Figure 7 , the device further comprises a voltage reduction and voltage stabilization circuit, which is externally connected with a power supply and performs voltage reduction and voltage stabilization (converts 24V into 5V) to supply power to the whole device.

[0112] The above is only a preferred embodiment of the present application, and is not intended to limit the present application in other forms. Any skilled person in the art can modify or change the above disclosed technical content into equivalent embodiments. However, any simple modification, equivalent change and modification of the above embodiments without departing from the technical content of the present application, and according to the technical essence of the present application, still belong to the protection scope of the present application.

Claims

1. An elevator car appropriate stop position reminding device characterized by, The elevator comprises a main control module, a car position detection module, a floor LED display module, a voice reminding module, and an elevator up-down, speed and origin detection module; the elevator up-down, speed and origin detection module comprises three magnetic steels, three Hall sensors and a signal acquisition module, the three magnetic steels are circumferentially installed on the peripheral part of a tensioning wheel of an elevator pit, the three Hall sensors are arranged on the side of the tensioning wheel and face the circumferences where the three magnetic steels are located, so as to obtain up-down running direction signals, speed signals and origin signals by detecting the magnetic field changes caused by the rotation of the three magnetic steels with the tensioning wheel, and the three Hall sensors are electrically connected with the main control module through the signal acquisition module; the car position detection module comprises a photoelectric sensor and two mirror plates, the two mirror plates are respectively installed on the car guide rails on the upper and lower sides of a leveling switch, the photoelectric sensor is installed on an elevator car, so as to obtain car position signals when the photoelectric sensor passes the mirror plates, and the photoelectric sensor is electrically connected with the main control module; the voice reminding module is installed on the elevator car, the floor LED display module is installed on a floor panel outside a floor hall door, and the voice reminding module and the floor LED display module are electrically connected with the main control module, so as to perform sound and light alarm when the photoelectric sensor detects that the car reaches a set position.

2. The elevator car appropriate stopping position reminding device according to claim 1, characterized in that, The main control module is a master station, the floor LED display module and the voice reminding module are slave stations, and the main control module communicates with the floor LED display module and the voice reminding module through a 485 communication mode.

3. The elevator car appropriate stopping position reminding device according to claim 1, characterized by, The main control module adopts an STC12C5A60S2 single-chip microcomputer as a main control chip.

4. The elevator car appropriate stopping position reminding device according to claim 3, characterized in that, The signal acquisition module adopts a 74HC14 high-speed 6-way Schmitt trigger inverter, three input ports of the signal acquisition module are connected with the three Hall sensors respectively, and three output ports of the signal acquisition module are connected with P0.0, P0.1 and P0.2 ports of the STC12C5A60S2 single-chip microcomputer.

5. The elevator car appropriate stopping position reminding device according to claim 1, characterized by, The Hall sensor adopts a 3144 chip.

6. The elevator car appropriate stopping position reminding device according to claim 1, characterized by, The two mirror plates are respectively located at positions 500 mm away from the upper part of the leveling switch and positions 500 mm away from the lower part of the leveling switch, so as to trigger the photoelectric sensor when the car reaches the hall door sill ± 500 mm.

7. The elevator car appropriate stopping position reminding device according to claim 1, characterized by, The photoelectric sensor adopts a retro-reflective photoelectric sensor CX-483.

8. The elevator car appropriate stopping position reminding device according to claim 1, characterized by, The elevator comprises n floor LED display modules, the car position detection module comprises 2n mirror plates, n is an integer greater than 0, the n floor LED display modules are respectively installed on floor panels outside n floor hall doors, and the 2n mirror plates are respectively installed on the car guide rails on the upper and lower sides of the leveling switches of the n floors, so as to light up the LED display modules of the corresponding floors when the photoelectric sensor detects signals at the corresponding floors.

9. The elevator car appropriate stopping position reminding device according to claim 1, characterized by, The voice reminding module adopts an ETV001-485TTS voice broadcaster.

10. The elevator car appropriate stopping position reminding device according to claim 1, characterized by, The elevator comprises a voltage reduction and stabilization circuit, the voltage reduction and stabilization circuit is externally connected with a power supply and performs voltage reduction and stabilization to supply power to the whole device.

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