Passenger elevator with automatic sound-absorbing car

Abstract

The present invention discloses a passenger elevator with an automatic mute car, which overcomes the problem in the prior art that the mute effect of the elevator mute device is affected by time and it is impossible to detect whether the mute device is faulty. The invention comprises: a noise collection device for collecting the sound signal of the elevator noise and sending it to the control system; a control system for performing frequency domain transformation on the sound signal of the collected elevator noise to obtain the elevator noise frequency, sending a control signal to the mute device, and judging whether the mute device is faulty; a mute device for receiving the control signal sent by the control system, sending a mute frequency, offsetting the noise frequency, and achieving mute; a monitoring device for monitoring whether the mute device is faulty and sending monitoring data to the control system. The noise generated during the operation of the elevator can be eliminated, and the passenger's use experience can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of elevator equipment, and in particular to a passenger elevator with an automatic sound-absorbing car. Background Art

[0002] At present, the elevator car is raised or lowered by the steel wire rope fixed on the car, and it rises or falls under the drive of the traction machine. Some low-frequency components of the traction machine can be transmitted to the elevator car through the steel wire rope during operation. This low-frequency noise makes people feel very uncomfortable and affects the comfort of riding the elevator. At the same time, as the speed of the elevator continues to increase, when the speed of the elevator increases, the air resistance of the elevator running in the shaft increases, resulting in aerodynamic noise becoming another major source of noise in addition to the friction of the guide rollers, the operation of the motor, and vibration. When various noises are transmitted to the car through air or solids, the passenger's elevator experience drops sharply. Therefore, how to eliminate the noise of the elevator car and improve the passenger's sense of use is a problem that needs to be solved urgently.

[0003] Most of the current silencers for elevators use silencer cotton for silencer. For example, the China Patent Office disclosed a utility model named a shock-absorbing and noise-reducing device for villa elevators on May 11, 2021, and its publication number is CN213171005U. The utility model is used for the shock-absorbing and noise-reducing device for villa elevators. The noise reduction box is provided with silencer holes and silencer cotton, so that the noise generated during shock absorption can be absorbed by the silencer cotton, thereby achieving the effect of noise reduction. A shock-absorbing seat is provided inside the noise reduction box, and a telescopic rod and a shock-absorbing spring are provided between the shock-absorbing seat and the upper pad, so that the telescopic rod can be telescoped through the shock-absorbing spring, thereby using the elastic force of the shock-absorbing spring to slow down the impact received by the upper pad. The shock-absorbing seat is provided with a support rod, a telescopic spring and a movable shaft, and a rotating seat, a connecting rod and a connecting column are provided between the upper pad and the movable shaft, so that when the upper pad is impacted and pressed down, the rotating seat, the connecting rod and the connecting column are used to squeeze the telescopic spring by the two movable shafts, thereby further achieving the effect of shock absorption and achieving the purpose of shock absorption and noise reduction. However, this invention only uses sound-absorbing cotton to absorb noise. However, as the use time increases, the sound-absorbing cotton may age and the noise reduction and silencing effect will decrease. In addition, it is impossible to detect whether it has a fault and the sound-absorbing effect cannot be guaranteed. Summary of the invention

[0004] The purpose of the present invention is to overcome the problem in the prior art that the silencing effect of the elevator silencing device is affected by time and whether the silencing device is faulty cannot be detected, and a passenger elevator with an automatic silencing car is provided, which can eliminate the noise generated during the operation of the elevator and improve the passenger experience.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: including:

[0006] A noise collection device is used to collect noise sound signals inside and outside the elevator car and send them to the control system;

[0007] The control system is used to perform frequency domain transformation on the noise sound signals collected inside and outside the elevator car, obtain the noise frequency and noise amplitude inside and outside the elevator car, send a control signal to the silencer, and determine whether the silencer is faulty;

[0008] The silencing device is used to receive the control signal from the control system, send out a silencing signal, offset the noise signal inside and outside the elevator car, and achieve silencing;

[0009] The monitoring device is used to monitor whether the silencer device fails and send the monitoring data to the control system.

[0010] The noise collection device is connected to the control system, and the noise sound signals collected inside and outside the elevator car are transmitted to the control system. The control system performs frequency domain transformation on the noise sound signals shown, and determines the noise frequency inside the elevator car and the noise frequency outside the elevator car respectively; the control system is connected to the silencing device, and the control system sends the control signal inside the elevator car and the control signal outside the elevator car to the silencing device according to the noise frequency. The silencing device emits a sound frequency according to the control signal, so as to achieve the effect of mutual interference and mutual cancellation with the noise signal, thereby achieving silencing. The monitoring device is connected to the silencing device and the control system respectively, and the monitoring device is used to detect whether the silencing frequency emitted by the silencing device is normal. If a fault is detected, a fault signal is sent to the control system. The present invention takes into account the noise inside and outside the elevator car at the same time, and can implement dynamic and real-time monitoring of the sound inside and outside the elevator car at the same time, and does not need to change the structure of the car, is easy to maintain, has a long service life, and the use effect does not change much over time, and can better reduce the noise in the car to a minimum, thereby greatly improving the comfort of riding the elevator.

[0011] Preferably, an alarm device is also included, which is connected to the control system and is used to receive a control signal from the control system and to give an alarm when a silencing device fails. The alarm device is used to remind management personnel that the silencing device fails, so that management personnel can repair or replace the silencing device in time to maximize the comfort of passengers riding the elevator.

[0012] Preferably, the control system includes a sound wave acquisition module, a mute frequency acquisition module, a volume detection module, and a frequency analysis module. The sound wave acquisition module is connected to the mute frequency acquisition module, the frequency analysis module is respectively connected to the monitoring device and the mute frequency acquisition module, and the volume detection module is connected to the detection device. The sound wave acquisition module is used to process the noise sound signal collected by the noise collection device, analyze the frequency of the noise sound signal, and send the result to the mute frequency acquisition module. The mute frequency acquisition module calculates the required mute frequency according to the frequency of the noise sound signal, and sends a control signal to the mute device, so that the mute device emits a sound signal of the corresponding frequency. The frequency analysis module is used to compare the mute frequency emitted by the mute device monitored by the monitoring device and the required mute frequency calculated by the mute frequency acquisition module, and determine whether the two frequencies are equal. If not, it means that the mute device is faulty and needs to be repaired or replaced. The volume detection module is used to receive the volume inside the elevator car detected by the monitoring device and compare it with the preset volume value in the volume detection module to determine whether it is below the preset value. If so, it means that all devices are working normally; if not, it means that the noise collection device or the silencer is faulty and needs to be repaired and inspected. If the comparison data obtained by the frequency analysis module is normal and the comparison data obtained by the volume detection module is abnormal, it means that the fault is likely to occur in the noise collection device.

[0013] Preferably, the alarm device includes an audible and visual alarm and a terminal, and the audible and visual alarm and the terminal are connected to a control system. The control system determines whether the silencer fails based on the monitoring data of the monitoring device. If so, a control signal is sent to the alarm device, and the audible and visual alarm works to alert the management personnel. At the same time, the control system can also send a control signal to the terminal, and the terminal displays the fault information. The management personnel can understand the situation of the silencer through the terminal, and can repair or replace the silencer in time to ensure that the silencer can operate normally and improve the passenger's sense of use.

[0014] Preferably, the device further comprises a memory for storing data of the noise collecting device, the silencing device and the monitoring device, so as to facilitate management personnel to call and view the data.

[0015] Preferably, a filtering device is also included to filter the sound signal of the elevator noise collected by the noise collecting device. During the operation of the elevator, other noises may appear. Such noises do not always exist and exist for a short time, which will interfere with the detection results and thus interfere with the mute frequency emitted by the mute device. Therefore, a filtering device is added to filter out the noise not generated during the operation of the elevator itself.

[0016] Preferably, the silencing device includes a vibration sound generator, which is connected to the control system. The silencing devices are distributed inside and outside the elevator car to eliminate noise inside and outside the elevator car, respectively, and improve the passenger's experience.

[0017] Preferably, the noise collection device includes sound sensors, which are distributed inside and outside the elevator car. The sound sensor inside the elevator car is used to collect the noise inside the elevator car, and the sound sensor outside the elevator car is used to collect the noise inside the elevator car. The specific distribution position and number of the sound sensors depend on the specific situation.

[0018] Preferably, the monitoring device includes a decibel tester and a frequency monitoring module, both of which are connected to the control system. The decibel tester is distributed inside the elevator car to detect the sound inside the elevator car; the frequency monitoring module is used to detect the frequency of the sound emitted by the silencer and send it to the control system.

[0019] Therefore, the present invention has the following beneficial effects: 1. It has great flexibility, the silencing frequency can be adjusted in real time, and it is applicable to various elevator cars without changing the car structure; 2. It has a fast response rate and obvious silencing, which improves the passenger experience; 3. The silencing effect is not affected by time and has high reliability; 4. A monitoring device is provided to monitor in real time whether the silencing device has any faults, which is convenient for timely detection of problems and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of a system structure according to the first embodiment;

[0021] Figure 2 is a schematic diagram of a system structure according to the second embodiment;

[0022] Figure 3 is a schematic diagram of a system structure according to Embodiment 3;

[0023] In the figure: 1. Noise collection device; 2. Control system; 3. Silencer; 4. Monitoring device; 5. Alarm device; 6. Memory; 7. Filtering device. DETAILED DESCRIPTION

[0024] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0025] The first embodiment of the present invention is a passenger elevator with an automatic silencing car. Figure 1As shown, it includes a noise collecting device 1, a control system 2, a silencer 3, a monitoring device 4 and an alarm device 5, and the control system is connected to the noise collecting device, the silencer, the monitoring device and the alarm device respectively.

[0026] Specifically, the noise collection device is used to collect noise sound signals inside and outside the elevator car and send them to the control system. The noise collection device includes a sound sensor, which is distributed inside and outside the elevator car to collect noise inside and outside the elevator car respectively and transmit it to the control system. The specific installation position of the sound sensor can be the top and side of the elevator car, and the top and side of the elevator car.

[0027] The silencing device is used to receive a control signal from a control system and send out a silencing signal, wherein the frequency and amplitude of the silencing signal are equal to the noise signal, but the phase is shifted by 180°, thereby canceling the noise signal inside and outside the elevator car to achieve silencing. The silencing device includes a vibration sound generator, which is distributed inside and outside the elevator car. The specific installation position of the vibration sound generator depends on the specific situation.

[0028] The monitoring device is used to monitor whether the silencer fails and send monitoring data to the control system. The monitoring device includes a decibel tester and a frequency monitoring module, both of which are connected to the control system. The decibel tester is installed inside the elevator car to detect the sound inside the elevator car, simulate the sound heard by passengers inside the elevator, and determine whether the silencer is muted. The frequency monitoring module is used to monitor the sound frequency of the silencer and send the detected data to the control system.

[0029] The control system is used to perform frequency domain transformation on the noise sound signals collected inside and outside the elevator car, obtain the noise frequency inside the elevator car and the noise frequency outside the elevator car, send a control signal to the silencer, and determine whether the silencer is faulty. The control system includes a sound wave acquisition module for processing the noise sound signal collected by the noise collection device, analyzing the frequency of the noise sound signal, and sending the result to the silencer frequency acquisition module; a sound wave acquisition module for calculating the required silencer frequency and amplitude of the silencer signal according to the frequency of the noise sound signal, and sending a control signal to the silencer frequency acquisition module of the silencer; a frequency analysis module for comparing the silencer frequency emitted by the silencer monitored by the monitoring device and the required silencer frequency calculated by the silencer frequency acquisition module to determine whether the two frequencies are equal; a volume detection module for receiving the volume inside the elevator car detected by the monitoring device, and comparing it with the preset volume value in the volume detection module to determine whether it is below the preset value.

[0030] The alarm device is used to receive the control signal of the control system and to sound an alarm when the silencer fails. The alarm device includes an audible and visual alarm and a terminal. The alarm device receives the control signal of the control system, and the audible and visual alarm works to sound an alarm to remind the management personnel. At the same time, the terminal can also display the fault information, indicating whether the problem is with the data of the decibel tester or the frequency monitoring module, so that the management personnel can understand the specific situation through the terminal, judge whether the silencer fails, and can promptly repair or replace the silencer when the silencer fails, so as to ensure that the silencer can operate normally and improve the passenger's sense of use.

[0031] When in use, the noise collection device collects the noise inside and outside the elevator car respectively, and sends the collected noise signals to the sound wave acquisition module in the control system. The sound wave acquisition module processes the collected noise signals to obtain the sound frequency and amplitude of the noise, and sends the result to the mute frequency acquisition module. The mute frequency acquisition module calculates the frequency and amplitude of the mute signal according to the sound frequency and amplitude of the noise, and sends a control signal to the mute device. The mute device sends a sound wave signal with the mute frequency and amplitude to interfere with the noise signal, thereby achieving the effect of mutual interference and mutual cancellation with the noise signal, thereby achieving mute.

[0032] During the operation of the silencer, the decibel tester of the monitoring device detects the sound inside the elevator car and sends it to the volume detection module. The volume detection module is preset with a volume threshold. If the detected volume value inside the elevator car is greater than the preset value, it means that silence is not achieved, and the silencer or detection device may be faulty and needs to be inspected and repaired. At the same time, the frequency monitoring module of the monitoring device is also monitoring the frequency of the silencer signal and sends the detected frequency to the frequency analysis module. The frequency analysis module simultaneously obtains the frequency data calculated by the silencer frequency acquisition module and compares the calculated frequency of the silencer signal with the actual monitored silencer frequency. If they are consistent, it means that the silencer is working normally. If they are inconsistent, it means that the silencer is faulty and needs to be inspected and repaired.

[0033] If a fault is detected, the control system sends an alarm signal to the alarm device, and the sound and light alarm in the alarm device starts working to alert the management personnel; at the same time, the terminal displays whether the data detected by the decibel tester or the frequency monitoring module in the monitoring device is faulty, so that the management personnel can pre-judge whether the muffler is faulty. Specifically, if the decibel tester detects a fault, but the frequency monitoring module does not detect a fault, it means that there is a high probability that there is a problem with the noise acquisition device or the control system; if the frequency monitoring module detects a fault, it means that there is a problem with the muffler.

[0034] The second embodiment of the present invention is a passenger elevator with an automatic silencing car. Figure 2 As shown, it includes a noise collection device 1, a control system 2, a silencer 3, a monitoring device 4 and a memory 6. The noise collection device, the silencer and the monitoring device are all connected to the control system, and the memory is respectively connected to the noise collection device, the monitoring device, the silencer and the control system. The memory is used to store data of the noise collection device, the silencer, the monitoring device and the control system, so that the management personnel can call and view the data.

[0035] When in use, the noise collection device collects the noise inside and outside the elevator car respectively, and sends the collected noise signals to the control system. The control system processes the collected noise signals to obtain the sound frequency and amplitude of the noise, and calculates the sound elimination frequency and amplitude based on the sound frequency and amplitude of the noise, and sends a control signal to the silencer. The silencer sends a sound wave signal with the sound elimination frequency and amplitude to interfere with the noise signal, thereby achieving the effect of mutual interference and mutual cancellation with the noise signal, and realizing silence. At the same time, all the data generated by the noise collection device, silencer, monitoring device and control system during operation are transmitted to the memory for storage so that the management personnel can view it.

[0036] During the operation of the silencer, the decibel tester of the monitoring device detects the sound inside the elevator car and sends it to the volume detection module. The volume detection module is preset with a volume threshold. If the detected volume value inside the elevator car is greater than the preset value, it means that silence is not achieved, and the silencer or detection device may be faulty and needs to be inspected and repaired. At the same time, the frequency monitoring module of the monitoring device is also monitoring the frequency of the silencer signal and sends the detected frequency to the frequency analysis module. The frequency analysis module simultaneously obtains the frequency data calculated by the silencer frequency acquisition module and compares the calculated frequency of the silencer signal with the actual monitored silencer frequency. If they are consistent, it means that the silencer is working normally. If they are inconsistent, it means that the silencer is faulty and needs to be inspected and repaired.

[0037] The third embodiment of the present invention is a passenger elevator with an automatic silencing car. Figure 3 As shown, it includes a noise collection device 1, a control system 2, a silencer 3, a monitoring device 4 and a filter 7. The noise collection device is connected to the filter, and the filter, silencer and monitoring device are all connected to the control system. The filter is used to filter the sound signal of the elevator noise collected by the noise collection device to filter out the noise generated during the operation of the elevator itself. The filter can be a bandpass filter to filter out clutter through a preset noise frequency band.

[0038] When in use, the noise collection device collects the noise inside and outside the elevator car respectively, and sends the collected noise signals to the filtering device. The filtering device filters out the signals generated during the operation of the elevator, and sends the filtered noise signals to the sound wave acquisition module in the control system. The sound wave acquisition module processes the collected noise signal to obtain the sound frequency and amplitude of the noise, and sends the result to the mute frequency acquisition module. The mute frequency acquisition module calculates the frequency and amplitude of the mute signal according to the sound frequency and amplitude of the noise, and sends a control signal to the mute device. The mute device sends the sound wave signal of the mute frequency and amplitude to interfere with the noise signal, thereby achieving the effect of mutual interference and mutual cancellation with the noise signal, thereby achieving mute.

[0039] During the operation of the silencer, the decibel tester of the monitoring device detects the sound inside the elevator car and sends it to the volume detection module. The volume detection module is preset with a volume threshold. If the detected volume value inside the elevator car is greater than the preset value, it means that silence is not achieved, and the silencer or detection device may be faulty and needs to be inspected and repaired. At the same time, the frequency monitoring module of the monitoring device is also monitoring the frequency of the silencer signal and sends the detected frequency to the frequency analysis module. The frequency analysis module simultaneously obtains the frequency data calculated by the silencer frequency acquisition module and compares the calculated frequency of the silencer signal with the actual monitored silencer frequency. If they are consistent, it means that the silencer is working normally. If they are inconsistent, it means that the silencer is faulty and needs to be inspected and repaired.

[0040] The above-described embodiments are only two preferred solutions of the present invention and are not intended to limit the present invention in any form. Other variations and modifications are possible without exceeding the technical solutions described in the claims.

Claims

1. A passenger elevator with an automatic silencing car, characterized in that: include: A noise collection device is used to collect noise sound signals inside and outside the elevator car and send them to the control system; A control system is used to perform frequency domain transformation on the noise sound signals collected inside and outside the elevator car, obtain the noise frequency and noise amplitude inside and outside the elevator car, send a control signal to the silencer, and determine whether the silencer is faulty based on the control signal and the silencer signal; The silencing device is used to receive the control signal from the control system, send out a silencing signal, offset the noise signal inside and outside the elevator car, and achieve silencing; A monitoring device, including a decibel tester and a frequency monitoring module, is used to monitor whether the silencer has a fault, determine the fault location based on the silencer frequency or the sound signal heard by the passenger inside the elevator, and send monitoring data to the control system; The control system includes a volume detection module, a mute frequency acquisition module and a frequency analysis module. The frequency analysis module determines whether the mute frequency monitored by the frequency monitoring module is equal to the mute frequency calculated by the mute frequency acquisition module. If not, the mute device is faulty. The volume detection module determines whether the volume inside the elevator car detected by the decibel tester is below the preset volume value in the volume detection module. If so, all devices are working normally. If not, the noise collection device or the mute device is faulty. If the comparison data obtained by the frequency analysis module is normal and the comparison data obtained by the volume detection module is abnormal, the noise collection device or the control system is faulty.

2. A passenger elevator with an automatic sound-absorbing car according to claim 1, characterized in that: It also includes an alarm device for receiving a control signal from the control system and giving an alarm when a failure occurs in the silencer device.

3. A passenger elevator with an automatic sound-absorbing car according to claim 1, characterized in that: The control system comprises a sound wave acquisition module, and the sound wave acquisition module is connected to the sound elimination frequency acquisition module.

4. A passenger elevator with an automatic sound-absorbing car according to claim 2, characterized in that: The alarm device comprises an audible and visual alarm and a terminal, and both the audible and visual alarm and the terminal are connected to a control system.

5. A passenger elevator with an automatic sound-absorbing car according to claim 1, characterized in that: It also includes a memory for storing data of the noise collection device, the silencer, the monitoring device and the control system.

6. A passenger elevator with an automatic sound-absorbing car according to claim 1 or 2, characterized in that: It also includes a filtering device for filtering the noise sound signals inside and outside the elevator car collected by the noise collecting device.

7. A passenger elevator with an automatic sound-absorbing car according to claim 1 or 3, characterized in that: The silencing device comprises a vibration sound generator, and the vibration sound generator is connected to a control system.

8. A passenger elevator with an automatic sound-absorbing car according to claim 1 or 3, characterized in that: The noise collecting device comprises sound sensors, which are distributed inside and outside the elevator car.

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