Elevator roof rushing and bottom squatting detection device

Abstract

The utility model discloses an elevator top rushing and bottom squatting detection device, which comprises a microcontroller, a serial port optoelectronic isolator, a current acquisition unit, a laser range finder and an early warning feedback device, the microcontroller is connected with the serial port optoelectronic isolator, the serial port optoelectronic isolator is connected with a serial interface of an elevator main control board, and the current acquisition unit is connected with the laser range finder. The current collecting unit is arranged at the input end and the output end of a frequency converter of an elevator control box, the laser rangefinder is arranged at the top of an elevator shaft and used for collecting position information of an elevator, the current collecting unit and the laser rangefinder are connected with the microcontroller, and the current collecting unit collects current at the input end and the output end of the frequency converter of the elevator control box. The microcontroller judges whether the current of the input end and the output end of the frequency converter exceeds a set threshold value or not when the elevator runs in a specific position interval, and gives an alarm through the early warning feedback device when the current exceeds the set threshold value, a position detector and a speed sensor do not need to be installed in an elevator room, the use cost is low, and popularization is easy.

Description

Technical Field

[0001] The utility model belongs to the technical field of elevator safety, and in particular relates to an elevator top-up and bottom-down detection device. Background Art

[0002] Elevators are important transportation equipment in high-rise buildings, bringing great convenience to people's travel and the transportation of goods. At the same time, the safety of elevators has always been a focus of people's attention. Among them, elevator top-to-bottom and bottom-to-bottom accidents are typical and highly dangerous types of elevator accidents. When people are riding in an elevator, if the elevator hits the top or bottom and the accident occurs, the huge impact force will cause serious or even fatal injuries to the people in the elevator.

[0003] The existing technical safety means to prevent elevators from hitting the top or bottom is usually to install buffer switches and limit position detection switches on the elevator shaft track to detect the running position of the elevator when it hits the top or bottom. The main control board of the elevator receives the signals of these switches and outputs variable frequency signals to slow down the elevator traction machine and control the traction machine to brake. Once these switches fail, it is very easy for the elevator to hit the top or bottom. In the existing technology, position detectors and speed sensors are usually added to the elevator room to monitor the position of the elevator and the running speed of the elevator. However, the installation process of the elevator position detector and speed sensor is complicated and the installation cost is high, making it difficult to promote and apply. Therefore, it is of great significance to study a low-cost, economical and efficient, easy-to-promote and applicable elevator hitting the top and bottom detection device for elevator safe operation monitoring.

[0004] Therefore, the utility model proposes an elevator top-up and bottom-down detection device to solve the above technical problems. Utility Model Content

[0005] The purpose of the utility model is to provide an elevator top-and-bottom detection device to solve the technical problems in the prior art of adding a position detector in the elevator room to collect the position of the elevator and combining it with a speed sensor set in the elevator to collect the elevator running speed to detect the elevator top-and-bottom faults, which have a complicated installation process, high cost, and lack of an economical and efficient monitoring method for elevator top-and-bottom faults.

[0006] To achieve the above-mentioned purpose, the present invention provides an elevator top-up and bottom-down detection device, comprising:

[0007] A microcontroller and a serial port photoelectric isolator, wherein the microcontroller is connected to the serial port photoelectric isolator, and the serial port photoelectric isolator is connected to the serial interface of the elevator main control board;

[0008] A current acquisition unit, the current acquisition unit being connected to the input and output terminals of the frequency converter of the elevator control box, and the current acquisition unit being connected to the microcontroller;

[0009] A laser rangefinder is provided at the top of the elevator shaft and is connected to the microcontroller.

[0010] Preferably, in the above technical solution, the current acquisition unit includes a first current collector for collecting the current at the input end of the inverter of the elevator control box and a second current collector for collecting the current at the output end of the inverter of the elevator control box. The first current collector is a current transformer, and the second current collector includes a Hall current transformer and a high-speed ADC module. The Hall current transformer is connected to the high-speed ADC module, and the high-speed ADC module is connected to the microcontroller.

[0011] Preferably, in the above technical solution, a level detection unit is further included, and the level detection unit includes a multi-way analog switch, the input end of the multi-way analog switch is connected to the switch input end of the elevator main control board, the output end is connected to the microcontroller, and the control end of the multi-way analog switch is connected to an output end of the microcontroller.

[0012] Preferably, in the above technical solution, the level detection unit also includes a voltage transformer module, the input end of the voltage transformer module is respectively connected to the inverter input end of the elevator control box and the power supply end of the elevator control box, and the output end of the voltage transformer module is connected to an input end of the microcontroller.

[0013] Preferably, in the above technical solution, a timer and a storage are further included, and the timer and the storage are respectively connected to the microcontroller.

[0014] Preferably, the above technical solution also includes an early warning feedback device, which includes a warning light, an abnormal light, an operating light, a display, a timer and a memory, and the warning light, abnormal light, operating light, display, timer and memory are respectively connected to the microcontroller.

[0015] Preferably, in the above technical solution, the early warning feedback device further includes a wireless communication module, and the wireless communication module is a 4G wireless communication module.

[0016] Preferably, the above technical solution further includes a power module, which includes a lithium battery, an AC-to-DC step-down power module and a power-off switch, the input end of the power-off switch is respectively connected to the lithium battery and the AC-to-DC step-down power module, the input end of the AC-to-DC step-down power module is connected to the power end of the elevator control box, and the output end of the power-off switch is connected to the microcontroller.

[0017] Compared with the existing technology, the utility model has the following beneficial effects:

[0018] 1. The utility model uses a laser rangefinder to collect the distance between the elevator car and the top of the elevator shaft. The microcontroller receives the data from the laser rangefinder to detect the position of the elevator. The current at the input and output terminals of the frequency converter of the elevator control box is collected by a current collection unit. The microcontroller determines whether the current at the input and output terminals of the frequency converter collected by the current collection unit exceeds a set threshold when the elevator is running in a specific position range. When the set threshold is exceeded, the microcontroller determines that there is a risk of the elevator hitting the top or bottom. The microcontroller combines the data collected by the laser rangefinder to determine whether the elevator has already hit the top or bottom. The utility model does not need to install a position detector and a speed sensor in the elevator room, has a low cost of use, and is easy to promote.

[0019] 2. The utility model realizes the communication connection between the microcontroller and the elevator main control board through a serial port optoelectronic isolator. The microcontroller reads the operating data of the elevator main control board through the serial port to monitor the operating status of the elevator. At the same time, it is connected to the switch input end of the elevator control board through the level detection unit to monitor the operation status of each buffer switch, limit position detection switch, and leveling detection switch provided in the elevator shaft. When the elevator main control board is working abnormally, the microcontroller can still accurately obtain the operating position of the elevator, thereby improving the working stability of the device.

[0020] 3. The early warning feedback device of the present invention is provided with a wireless communication module, which sends alarm information to the mobile phone of the operation and maintenance personnel through the wireless communication module, so that the operation and maintenance personnel can promptly discover the elevator's top-up and bottom-down accidents, and carry out advance maintenance on the elevator with the hidden dangers of top-up and bottom-down, so as to prevent the occurrence of accidents. At the same time, the early warning feedback device is also provided with an alarm light, an abnormality light, an operation light, a display, a timer and a memory. The timer and memory record the abnormal operation or failure events and time of the elevator. The operation and maintenance personnel can check the historical operation status of the elevator by checking the corresponding light indications and the contents of the display. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The utility model is a connection implementation diagram of an elevator top-up and bottom-down detection device and an elevator main control panel.

[0022] Figure 2 This is the overall electrical principle structure diagram of the elevator top-up and bottom-down detection device of the present invention.

[0023] In the figure: 100 - microcontroller, 101 - current acquisition unit, 102 - level detection unit, 103 - early warning feedback device, 104 - laser rangefinder, 105 - power module, 106 - serial port optoelectronic isolator, 1011 - first current collector, 1012 - second current collector, 1021 - multi-channel analog switch, 1022 - voltage transformer module, 1031 - warning light, 1032 - abnormal light, 1033 - operation light, 1034 - display, 1035 - timer, 1036 - storage, 1037 - wireless communication module, 1051 - AC to DC step-down power supply module, 1052 - lithium battery, 1053 - power-off switch. DETAILED DESCRIPTION

[0024] The specific implementation of the utility model is described in detail below with reference to the accompanying drawings, but it should be understood that the protection scope of the utility model is not limited by the specific implementation.

[0025] refer to Figure 1 and Figure 2 , an elevator top-rushing and bottom-squatting detection device, including a microcontroller 100, a serial port photoelectric isolator 106, a current acquisition unit 101 and a laser rangefinder 104, the microcontroller 100 is connected to the serial port photoelectric isolator 106, the serial port photoelectric isolator 106 is connected to the serial interface of the elevator main control board, the operation data of the elevator main control board is read through the serial port photoelectric isolator 106, thereby realizing the acquisition of the elevator operation status, the current acquisition unit 101 is respectively connected to the input and output ends of the inverter of the elevator control box, the current acquisition unit is connected to the microcontroller to collect the current at the input and output ends of the inverter, the current acquisition The current collection unit 101 is connected to the microcontroller 100. The microcontroller 100 monitors the current at the input and output ends of the inverter by reading the data of the current collection unit 101. The laser rangefinder 104 is provided at the top of the elevator shaft and is used to collect the distance between the elevator car and the top of the elevator shaft. The laser rangefinder 104 is connected to the microcontroller 100. In this embodiment, the laser rangefinder 104 uses a PLS-K-60 laser ranging module. The laser rangefinder 104 and the microcontroller 100 perform data transmission and control through TTL level. The microcontroller 100 uses an STC12C5A60S2 single-chip microcomputer.

[0026] Furthermore, the current acquisition unit 101 includes a first current collector 1011 for collecting the current at the input end of the inverter of the elevator control box and a second current collector 1012 for collecting the current at the output end of the inverter of the elevator control box. The first current collector 1011 is a current transformer, and the second current collector 1012 includes a Hall current transformer and a high-speed ADC module. The Hall current transformer is connected to the high-speed ADC module, and the high-speed ADC module is connected to the microcontroller 100. The current at the input end of the inverter collected by the first current collector 1011 is a power frequency current signal, and the second current collector 1012 collects a high-frequency current signal at the output end of the inverter.

[0027] Furthermore, the elevator top and bottom detection device further includes a level detection unit 102, which includes a multi-way analog switch 1021. The input end of the multi-way analog switch 1021 is connected to the switch input end of the elevator main control board, and the output end is connected to the microcontroller 100. The control end of the multi-way analog switch 1021 is connected to an output end of the microcontroller 100. Specifically, when the level detection unit 102 is running, the pin of the microcontroller 100 connected to the output end of the multi-way analog switch 1021 is configured as a floating input pin through a program to realize the level signal of the switch input end of the elevator control board. The microcontroller 100 writes a control command to the multi-way analog switch 1021 to select the level signal input to the microcontroller 100 from the switch input terminal of the elevator control board. When the elevator main control board malfunctions, the microcontroller can still accurately obtain the running position of the elevator, thereby improving the working stability of the device. In this embodiment, the multi-way analog switch 1021 is composed of multiple analog switches of the model MUX36S08, which realizes the detection of multiple switch input terminal signals of the elevator control board using only a small number of MUX36S08 switches and pin resources of the microcontroller 100.

[0028] Furthermore, the level detection unit 102 also includes a voltage transformer module 1022. The input end of the voltage transformer module 1022 is respectively connected to the inverter input end and the power supply end of the elevator control box, and the output end of the voltage transformer module 1022 is connected to the microcontroller 100 to monitor the input voltage signal of the inverter and the voltage signal of the power supply end. In this embodiment, the voltage transformer module 1022 uses two ZMPT101B single-phase AC voltage transformer modules. This module can convert the AC high voltage at the inverter input end and the power supply end of the elevator control box into a DC voltage signal for direct measurement by the AD port of the microcontroller 100.

[0029] Furthermore, the elevator top-and-bottom detection device also includes a reflection plate arranged on the top of the elevator for reflecting the laser of the laser rangefinder 104 to improve the measurement accuracy of the laser rangefinder 104.

[0030] Furthermore, the elevator top-rushing and bottom-squatting detection device also includes an early warning feedback device 103, which includes an alarm light 1031, an abnormality light 1032, an operating light 1033, a display 1034, a timer 1035 and a memory 1036. Specifically, the alarm light 1031, the abnormality light 1032, the operating light 1033 and the display 1034 are respectively connected to the microcontroller 100, and the alarm light 1031, the abnormality light 1032, the operating light 1033 and the display 1034 are used to display the operating status of the elevator. The timer 1035 and the memory 1036 are respectively connected to the microcontroller 100, and the timer 1035 and the memory 1036 record the abnormal or fault events and time of the elevator operation.

[0031] Furthermore, the early warning feedback device 103 also includes a wireless communication module 1037, which is a 4G wireless communication module. The wireless communication module 1037 is connected to the microcontroller 100. The wireless communication module 1037 can send alarm information to the mobile phone of the operation and maintenance personnel, so that the operation and maintenance personnel can promptly discover the elevator's top-rushing and bottom-squatting accidents, and carry out advance maintenance on elevators with hidden dangers of top-rushing and bottom-squatting to prevent accidents from occurring.

[0032] Furthermore, the elevator top-rushing and bottom-squatting detection device also includes a power supply module 105, which includes a lithium battery 1052, an AC-to-DC step-down power supply module 1051 and a power-off switch 1053. The input ends of the power-off switch 103 are respectively connected to the lithium battery 1052 and the AC-to-DC step-down power supply module 1051, the input end of the AC-to-DC step-down power supply module 1051 is connected to the power end of the elevator control box, and the output end of the power-off switch 1053 is connected to the microcontroller 100. The power supply mode of the device is automatically switched through the power-off switch 1053, thereby ensuring the reliability of the power supply of the detection device and improving the working stability of the detection device.

[0033] The main working principle of this utility model is:

[0034] The distance between the elevator car and the top of the elevator shaft is collected by the laser rangefinder 104. The microcontroller 100 receives the data of the laser rangefinder 104 and reads the operation data of the elevator main control board in combination with the serial port optoelectronic isolator 106, thereby realizing the real-time detection of the elevator operation position. The current acquisition unit 101 acquires the current at the input and output ends of the inverter of the elevator control box. The microcontroller 100 determines whether the current at the input and output ends of the inverter collected by the current acquisition unit 101 exceeds the set value when the elevator is traveling in a specific position range, such as the position range of the buffer position detection switch and the leveling detection switch. Threshold, when it exceeds the set threshold, such as when the elevator runs to the buffer position detection switch, the output current of the inverter should be less than the current value before passing through the buffer position detection switch, and the setting of the current value corresponds to the balance coefficient of the elevator operation. The balance coefficient of the elevator operation and the current size of the elevator traction machine when the elevator is running are set in accordance with the "Safety Specifications for Elevator Manufacturing and Installation GB7588-2003", which will not be repeated in this embodiment, and the current values ​​of the input and output terminals of the inverter passing through the leveling detection switch should be zero, or the output current value of the inverter should be less than the operating current of the traction machine. The microcontroller 100 determines that there is a risk of the elevator hitting the top or bottom. The microcontroller 100 combines the data collected by the laser rangefinder 104. When the laser rangefinder 104 collects the elevator, it determines whether the elevator has hit the top or bottom fault, and controls the warning light 1031 or the abnormal light 1032 of the early warning feedback device 103 to light up. At the same time, the microcontroller 100 records the time of the timer 1035, writes the fault event into the memory 1036, drives the display 1034 to display, and sends the alarm information to the mobile phone of the relevant operation and maintenance personnel through the wireless communication module 1037. The utility model does not need to install a position detector and a speed sensor in the elevator room, has a low cost of use, and is easy to promote.

[0035] The foregoing descriptions of specific exemplary embodiments of the present invention are for purposes of illustration and description. These descriptions are not intended to limit the invention to the precise forms disclosed, and it is apparent that many modifications and variations are possible in light of the above teachings. The exemplary embodiments are selected and described for the purpose of explaining the specific principles of the invention and its practical application, thereby enabling those skilled in the art to make and utilize various exemplary embodiments of the invention, as well as various alternatives and variations. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims

1. An elevator top-up and bottom-down detection device, characterized in that: include: A microcontroller and a serial port photoelectric isolator, wherein the microcontroller is connected to the serial port photoelectric isolator, and the serial port photoelectric isolator is connected to the serial interface of the elevator main control board; A current acquisition unit, the current acquisition unit being connected to the input and output terminals of the frequency converter of the elevator control box, and the current acquisition unit being connected to the microcontroller; A laser rangefinder is provided at the top of the elevator shaft and is connected to the microcontroller.

2. The elevator top-up and bottom-down detection device according to claim 1, characterized in that: The current acquisition unit includes a first current collector for collecting the current at the input end of the inverter of the elevator control box and a second current collector for collecting the current at the output end of the inverter of the elevator control box. The first current collector is a current transformer, and the second current collector includes a Hall current transformer and a high-speed ADC module. The Hall current transformer is connected to the high-speed ADC module, and the high-speed ADC module is connected to the microcontroller.

3. The elevator top-up and bottom-down detection device according to claim 1, characterized in that: It also includes a level detection unit, which includes a multi-way analog switch, the input end of the multi-way analog switch is connected to the switch input end of the elevator main control board, the output end is connected to the microcontroller, and the control end of the multi-way analog switch is connected to an output end of the microcontroller.

4. The elevator top-up and bottom-down detection device according to claim 3, characterized in that: The level detection unit further includes a voltage transformer module, the input end of the voltage transformer module is respectively connected to the inverter input end and the power supply end of the elevator control box, and the output end of the voltage transformer module is connected to an input end of the microcontroller.

5. The elevator top-up and bottom-down detection device according to claim 1, characterized in that: It also includes a reflection plate arranged on the top of the elevator for reflecting the laser of the laser rangefinder.

6. The elevator top-up and bottom-down detection device according to claim 1, characterized in that: It also includes an early warning feedback device, which includes a warning light, an abnormal light, an operating light, a display, a timer and a memory, and the warning light, abnormal light, operating light, display, timer and memory are respectively connected to the microcontroller.

7. The elevator top-up and bottom-down detection device according to claim 6, characterized in that: The early warning feedback device also includes a wireless communication module, which is a 4G wireless communication module.

8. The elevator top-up and bottom-down detection device according to claim 1, characterized in that: It also includes a power supply module, which includes a lithium battery, an AC-to-DC step-down power supply module and a power-off switch. The input end of the power-off switch is respectively connected to the lithium battery and the AC-to-DC step-down power supply module, the input end of the AC-to-DC step-down power supply module is connected to the power supply end of the elevator control box, and the output end of the power-off switch is connected to the microcontroller.

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