An elevator fault detection system and a door lock contact life monitoring device thereof

Abstract

The present invention discloses a door lock contact life monitoring device, including a monitor for monitoring the elevator floor door switch; an alarm device electrically connected to the monitor; the alarm device includes: a processing unit electrically connected to the monitor; a display unit electrically connected to the processing unit and used to display the service life of the door lock contacts; and an alarm unit electrically connected to the processing unit and used to send an alarm signal. The above-mentioned door lock contact life monitoring device can intuitively reflect the service life of the door lock contacts on the elevator floor doors, solving the problem of excessive maintenance and untimely maintenance of the door lock contacts. In addition, the present invention also discloses an elevator fault detection system including the above-mentioned door lock contact life monitoring device.

Description

Technical Field

[0001] The present invention relates to the technical field of life monitoring, and in particular to a door lock contact life monitoring device. In addition, the present invention also relates to an elevator fault detection system comprising the door lock contact life monitoring device. Background Art

[0002] As we all know, in order to ensure the safe operation of the elevator, the elevator fault detection system should be maintained regularly. At present, in the process of maintaining the elevator door at the elevator entrance, the staff mainly replaces the door lock contact of the elevator door. This door lock contact will be triggered once when the elevator door is completely closed. The service life of the door lock contact is usually more than 100,000 times. If the door lock contact fails, it will cause dangerous consequences such as sudden shutdown of the elevator.

[0003] However, maintenance work based on the length of time of use cannot distinguish the difference in frequency of use of floors, because the frequency of elevator stops at different floors can vary greatly. For floors with frequent traffic, the door lock contacts corresponding to this floor may have already failed after the scheduled maintenance time; while for floors with less traffic, the door lock contacts corresponding to this floor can still be used tens of thousands of times after the scheduled maintenance time.

[0004] Therefore, how to effectively determine whether the elevator door on each floor needs maintenance becomes a problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0005] The object of the present invention is to provide a door lock contact life monitoring device, which can intuitively reflect the service life of the door lock contacts on the elevator floor doors, solving the problem of excessive maintenance and untimely maintenance of the door lock contacts. Another object of the present invention is to provide an elevator fault detection system including the above-mentioned door lock contact life monitoring device.

[0006] To achieve the above-mentioned purpose, the present invention provides a door lock contact life monitoring device, comprising: a monitor for monitoring the elevator floor door switch; an alarm device electrically connected to the monitor; the alarm device comprises: a processing unit electrically connected to the monitor; a display unit electrically connected to the processing unit and used to display the service life of the door lock contacts; and an alarm unit electrically connected to the processing unit and used to send an alarm signal.

[0007] Preferably, the monitor is specifically an inductive proximity switch.

[0008] Preferably, the display part is specifically an LED digital tube display screen.

[0009] Preferably, the warning unit is specifically a buzzer and / or an indicator light.

[0010] Preferably, the processing unit includes: a central processing module electrically connected to the monitor; an alarm driving module electrically connected to the central processing module and used to send an alarm signal to the warning unit; and a display driving module electrically connected to the central processing module and used to output a display update signal to the screen display unit.

[0011] Preferably, the display driving module includes: a judgment submodule electrically connected to the central processing module and used to judge whether the elevator floor door is completely closed; a driving submodule electrically connected to the judgment submodule and used to update the display content of the screen display part; and a zeroing submodule electrically connected to the driving submodule.

[0012] Preferably, it also includes a switching power supply electrically connected to the elevator floor door for supplying power to the monitor and the alarm; the processing unit also includes: a clock module, a reset module, a power supply module, a communication module and an acquisition module electrically connected to the central processing module; wherein the power supply module is electrically connected to the switching power supply.

[0013] Compared with the above background technology, the door lock contact life monitoring device provided by the present invention can detect the number of times the elevator floor door is closed and intuitively display the service life of the door lock contact so that the staff can know whether the elevator floor door should be maintained. Specifically, the monitor is used to obtain a signal that the elevator floor door has been closed, and send the signal to the processing unit in the alarm. The processing unit can process the above signal and control the display unit to update the frequency of use of the door lock contact. In addition, when the frequency of use of the door lock contact is close to its service life, the processing unit will control the alarm unit to send an alarm signal to remind the staff to maintain the elevator floor door on that floor.

[0014] The present invention also provides an elevator fault detection system, comprising: an elevator floor door arranged at a floor elevator entrance, the elevator floor door having a door lock contact; and a door lock contact life monitoring device as described in any one of the above items and arranged in the elevator shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0016] Figure 1 A schematic diagram of a first door lock contact life monitoring device provided by the present invention;

[0017] Figure 2 A schematic diagram of the working principle of the monitor provided by the present invention;

[0018] Figure 3 A schematic diagram of a second door lock contact life monitoring device provided by the present invention;

[0019] Figure 4 A schematic diagram of the working principle of the display driving module provided by the present invention;

[0020] in,

[0021] 01- elevator floor door, 011- door body, 1- monitor, 2- alarm, 21- processing unit, 211- central processing module, 212- display driver module, 2121- judgment submodule, 2122- driver submodule, 2123- zeroing submodule, 213- alarm driver module, 214- clock module, 215- reset module, 216- power supply module, 217- communication module, 218- acquisition module, 22- screen display unit, 23- alarm unit, 3- switch power supply. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0024] Please refer to Figures 1 to 4 , Figure 1 A schematic diagram of a first door lock contact life monitoring device provided by the present invention; Figure 2 A schematic diagram of the working principle of the monitor provided by the present invention; Figure 3 A schematic diagram of a second door lock contact life monitoring device provided by the present invention; Figure 4 This is a schematic diagram of the working principle of the display driving module provided by the present invention.

[0025] The present invention provides a door lock contact life monitoring device, such as Figure 1 As shown, the door lock contact life monitoring device mainly includes a monitor 1 and an alarm 2.

[0026] Monitor 1 can monitor the opening and closing action of elevator floor door 01, because every time elevator floor door 01 is completely opened and closed once, the door lock contact will be triggered and used once, so the number of opening and closing actions of elevator floor door 01 can be detected as the usage frequency of the door lock contact.

[0027] The alarm 2 is electrically connected to the monitor 1. Specifically, the alarm 2 includes a processing unit 21, a display unit 22 and an alarm unit 23, wherein the processing unit 21 is electrically connected to the monitor 1 to obtain a signal from the monitor 1 that the elevator floor door 01 performs a switch action; the display unit 22 is electrically connected to the processing unit 21, and is used to display the real-time usage frequency of the door lock contact. Whenever the processing unit 21 obtains a signal that the elevator floor door 01 performs a switch action, the processing unit 21 processes the above signal and controls the display unit 22 to update the real-time usage frequency of the door lock contact; the alarm unit 23 is electrically connected to the processing unit 21. When the real-time usage frequency of the door lock contact is about to approach or even reach a preset service life, the processing unit 21 controls the alarm unit 23 to sound an alarm so that the staff knows that the elevator floor door 01 on the floor should be maintained; preferably, the display unit 22 and the alarm unit 23 are arranged adjacent to each other, so as to attract people's attention through the alarm unit 23 so that the human eye can detect the display content of the display unit 22.

[0028] It should be noted that the real-time usage frequency of the above-mentioned door lock contacts can be represented by the remaining life of the door lock contacts or the number of times they have been triggered for use. That is to say, the remaining life and usage frequency of the door lock contacts displayed on the display unit 22 can allow staff to know whether the door lock contacts should be replaced.

[0029] In the first embodiment, considering that the elevator door 01 is made of metal material, the monitor 1 adopts an inductive proximity switch. In order to ensure that it can accurately detect the opening and closing action of the elevator door 01, Figure 2 As shown, the inductive proximity switch should be set in the opening direction of a door body 011 in the elevator floor door 01, so as to detect that the door body 011 is opened once as a judgment condition for triggering the door lock contact once.

[0030] Preferably, when the door 011 is fully opened, the distance d between the inductive proximity switch and the door 011 is 1 It is preferably set to be less than 80% of the theoretical detection distance of the inductive proximity switch, generally 20-30 mm; and considering that the lower side of the door body 011 is easily bent, the height d of the inductive proximity switch is 2 It can be set to any value between two-thirds of the height of the door body 011 and the height of the entire door body 011, thereby ensuring that the inductive proximity switch can always detect the switching action of the elevator floor door 01.

[0031] In the second embodiment, the display unit 22 is specifically an LED digital tube display screen. Considering that the theoretical service life of the door lock contacts can reach hundreds of thousands of times, the above-mentioned LED digital tube display screen should be provided with at least six display areas, that is, at least six groups of LED digital tube display areas adjacent to each other in sequence.

[0032] Similar to the above description, the LED digital tube display screen can display the number of times the door lock contact has been triggered and used, and can also display the remaining service life of the door lock contact. This can be set according to actual needs.

[0033] In the third embodiment, the warning part 23 is specifically a buzzer and / or an indicator light. Here, a combination of a buzzer and an indicator light is taken as an example. When the number of times the door lock contact is used is close to the theoretical service life of the door lock contact, for example, the door lock contact has a remaining service life of 5000 times, the buzzer sounds and the indicator light lights up or flashes, so that relevant personnel know that they should maintain the door lock contacts on the current floor.

[0034] The specific value of the remaining life for causing the warning unit 23 to issue an alarm signal should be determined according to actual conditions such as the work efficiency of the maintenance personnel. This is only used as an example and does not represent a specific limitation on the alarm condition in this application.

[0035] It should be noted that for low-rise buildings such as small office buildings, the display unit 22 and the warning unit 23 are preferably arranged on the wall near the elevator entrance of the floor, so that the passengers can know whether the elevator door 01 on the current floor should be maintained, and then call the staff to replace the door lock contacts in time. Of course, for high-rise buildings such as large office buildings, the display unit 22 and the warning unit 23 can be arranged on the same circuit board as the processing unit 21, and the entire alarm 2 can be installed in the elevator shaft, waiting for the staff who are responsible for repairing the elevator fault detection system to conduct daily inspections.

[0036] In the fourth embodiment, if Figure 3 As shown, the processing unit 21 includes a central processing module 211, an alarm driving module 213 and a display driving module 212, wherein the central processing module 211 is electrically connected to the monitor 1, and is used to process the signal of the elevator floor door 01 switching action obtained by the monitor 1; the display driving module 212 is electrically connected to the central processing module 211, and is also electrically connected to the screen display unit 22, and is used to output a display update signal to the screen display unit 22. When the monitor 1 detects the switching action of the elevator floor door 01, the central processing module 211 controls the screen display unit 22 to update the real-time usage frequency of the door lock contact once through the display driving module 212; the alarm driving module 213 is electrically connected to the central processing module 211, and is also electrically connected to the warning unit 23, and is used to output an alarm signal to the warning unit 23. When the usage frequency of the door lock contact is close to its service life, the central processing module 211 controls the alarm device 2 to send an alarm signal through the alarm driving module 213.

[0037] It should be noted that the display driving circuit built into the display driving module 212 and the alarm driving circuit built into the alarm driving module 213 can refer to the prior art, which will not be introduced herein.

[0038] In the daily use of the elevator, the elevator door 01 may not be completely closed but opened again. At this time, the door lock contact has not been activated, but the monitor 1 will obtain a signal that the elevator door 01 is opened and closed once. In order to more accurately record the frequency of use of the door lock contact, a fifth embodiment is given here. Figure 4 As shown, the display driving module 212 mainly includes a judgment submodule 2121 and a driving submodule 2122. The judgment submodule 2121 is electrically connected to the central processing module 211, and is used to judge whether the elevator door 01 is completely closed; and the driving submodule 2122 is electrically connected to the judgment submodule 2121 and the screen display unit 22, and is used to update the display content of the screen display unit 22.

[0039] Among them, the specific working method of the judgment submodule 2121 is as follows: when the monitor 1 obtains the signal of the elevator floor door 01 to perform the switching action, the judgment submodule 2121 compares the interval time between two adjacent signal acquisitions with the complete opening and closing time of the elevator floor door 01. If the time between two adjacent signal acquisitions is less than the complete opening and closing time of the elevator floor door 01, it means that the elevator floor door 01 was not completely closed when the signal was obtained last time, and the driving submodule 2122 is controlled not to update the display content of the screen display unit 22, or in other words, the display update signal is not sent to the driving submodule 2122; otherwise, it means that the signal obtained by the last monitoring belongs to the situation that the elevator floor door 01 is completely closed, and the judgment submodule 2121 controls the driving submodule 2122 to update the display content of the screen display unit 22 according to the last monitoring signal.

[0040] It is worth mentioning that whether the current monitoring signal indicates that the elevator door 01 is completely closed needs to be judged based on the next monitoring signal. The judgment principle is the same as the above content and will not be repeated here.

[0041] In the sixth embodiment, if Figure 4 As shown, the display driving module 212 further includes a zeroing submodule 2123, which is electrically connected to the driving submodule 2122 and is used to send a zeroing signal to the driving submodule 2122 and adjust the display content of the screen display unit 22 to the initial preset content. Accordingly, the screen display unit 22 should be provided with a zeroing switch electrically connected to the zeroing submodule 2123. When the maintenance of the elevator door 01 is completed, the staff triggers the zeroing switch to reset and update the display content of the screen display unit 22.

[0042] It should be noted that with respect to the fifth and sixth embodiments, the judgment submodule 2121 and the zeroing submodule 2123 can also be built into the central processing module 211 in the form of a logic program, that is, a logic program having the same function as the judgment submodule 2121 and the zeroing submodule 2123 is implanted in the central processing module 211.

[0043] In the seventh embodiment, if Figure 3 As shown, the door lock contact life monitoring device also includes a switching power supply 3, which is electrically connected to the door lock circuit of the elevator floor door 01 and is used to supply power to the monitor 1 and the alarm 2, wherein the door lock circuit is a circuit electrically connected to the door lock contacts; considering that most door lock circuits are powered by 110VAC, as a preference, the switching power supply 3 is specifically a 110VAC-12VDC switching power supply, which in turn supplies power to the monitor 1 and the alarm 2, wherein AC represents alternating current and DC represents direct current.

[0044] In addition, the processing unit 21 further includes a clock module 214 , a reset module 215 , a power supply module 216 and a collection module 218 , all of which are electrically connected to the central processing module 211 . Preferably, the central processing module 211 is specifically an AT89C51 single-chip microcomputer; the clock module 214 has a built-in clock circuit and is used to provide the above-mentioned single-chip microcomputer with a constant working frequency. Preferably, its crystal oscillator adopts a 12MHz passive crystal oscillator; the reset module 215 has a built-in reset circuit and is used to realize the power-on reset and manual reset of the central processing module 211; the power supply module 216 is electrically connected to the above-mentioned switching power supply 3, and converts the voltage of 12VDC into a voltage of 5VDC and transmits it to the central processing module 211, so as to play the role of supplying power to the AT89C51 single-chip microcomputer; the communication module 217 is mainly used to realize the program burning and upgrading of the above-mentioned single-chip microcomputer. Preferably, it adopts a MAX232 chip to realize 232 level conversion; the acquisition module 218 is used to realize the signal acquisition and drive isolation of the monitor 1. For the first embodiment mentioned above, when the inductive proximity switch obtains the signal of the opening and closing action of the elevator door 01, the signal is optically isolated and input to the central processing module 211.

[0045] It should be noted that the structures and functional principles of the above-mentioned clock module 214, reset module 215, power supply module 216, communication module 217 and acquisition module 218 are conventional means in the technical field and will not be elaborated herein.

[0046] The present invention provides an elevator fault detection system, which includes an elevator floor door 01 arranged at a floor elevator entrance, wherein the elevator floor door 01 has a door lock contact; and also includes a door lock contact life monitoring device as described above, wherein the door lock contact life monitoring device is mainly arranged in the elevator shaft. Please refer to the above for its specific setting method, which will not be repeated here.

[0047] It should be noted that the above-mentioned elevator floor door 01, door lock contacts and other parts of the elevator fault detection system can all refer to the existing technology and will not be expanded in this article.

[0048] The elevator fault detection system and the door lock contact life monitoring device provided by the present invention are introduced in detail above. Specific examples are used in this article to illustrate the principle and implementation of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, the present invention can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A door lock contact life monitoring device, characterized in that: include: A monitor (1) for monitoring the opening and closing of an elevator landing door (01); An alarm device (2) electrically connected to the monitor (1); The warning device (2) comprises: a processing unit (21) electrically connected to the monitor (1); A display unit (22) electrically connected to the processing unit (21) and used to display the service life of the door lock contacts; an alarm unit (23) electrically connected to the processing unit (21) and configured to issue an alarm signal; The monitor (1) is specifically an inductive proximity switch; The warning part (23) is specifically a buzzer and / or an indicator light; The processing unit (21) comprises: A central processing module (211) electrically connected to the monitor (1); An alarm driving module (213) electrically connected to the central processing module (211) and used to send an alarm signal to the alarm unit (23); A display driving module (212) electrically connected to the central processing module (211) and configured to output a display update signal to the screen display unit (22); The display driving module (212) comprises: A judgment submodule (2121) electrically connected to the central processing module (211) and used to judge whether the elevator landing door (01) is completely closed; a driving submodule (2122) electrically connected to the judging submodule (2121) and used for updating the display content of the screen display unit (22); a zeroing submodule (2123) electrically connected to the driving submodule (2122); The inductive proximity switch is arranged in the opening direction of a door body (011) in the elevator landing door (01), so as to detect that the door body (011) is opened once as a determination condition for triggering the door lock contact once; When the door body (011) is fully opened, the distance d1 between the inductive proximity switch and the door body (011) is set to be less than 80% of the theoretical detection distance of the inductive proximity switch, and the height d2 of the inductive proximity switch is set to any value between two-thirds of the height of the door body (011) and the height of the entire door body (011), thereby ensuring that the inductive proximity switch can always detect the opening and closing action of the elevator landing door (01); The specific working method of the judgment submodule (2121) is as follows: when the monitor (1) obtains the signal of the elevator floor door (01) performing the opening and closing action, the judgment submodule (2121) compares the interval time between two adjacent signal acquisitions with the complete opening and closing time of the elevator floor door (01). If the time between two adjacent signal acquisitions is less than the complete opening and closing time of the elevator floor door (01), it means that the elevator floor door (01) was not completely closed when the signal was obtained last time, and the driving submodule (2122) is controlled not to update the display content of the screen display unit (22), or in other words, the display update signal is not sent to the driving submodule (2122); otherwise, it means that the signal obtained by the last monitoring belongs to the situation that the elevator floor door (01) is completely closed, and the judgment submodule (2121) controls the driving submodule (2122) to update the display content of the screen display unit (22) according to the last monitoring signal.

2. The door lock contact life monitoring device according to claim 1, characterized in that: The display unit (22) is specifically an LED digital tube display screen.

3. The door lock contact life monitoring device according to claim 1, characterized in that: It also includes a switch power supply (3) electrically connected to the elevator landing door (01) and used to supply power to the monitor (1) and the alarm (2); The processing unit (21) further comprises: A clock module (214), a reset module (215), a power supply module (216), a communication module (217) and a collection module (218) electrically connected to the central processing module (211); Wherein, the power supply module (216) is electrically connected to the switching power supply (3).

4. An elevator fault detection system, characterized in that: include: An elevator landing door (01) provided at an elevator entrance on a floor, wherein the elevator landing door (01) has a door lock contact; A door lock contact life monitoring device as claimed in any one of claims 1 to 3, arranged in an elevator shaft.

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