Elevator call-out automatic cancelling system and implementation method thereof

Abstract

The invention discloses an elevator outbound automatic cancelling system, which relates to the field of elevators, and comprises a signal acquisition module for acquiring the existence condition of personnel on an outbound floor in real time through a sensor and transmitting an analog signal to a signal processing module, and the signal processing module is used for carrying out analog-to-digital conversion, filtering and amplification on the signal to ensure the accuracy and reliability of the signal; and data processing: the signal processing module transmits the processed digital signal to the control unit, the control unit further analyzes and processes the data, the data processing comprises noise filtering, signal enhancement and feature extraction, and the system is ensured to accurately identify the existence condition of the personnel. According to the technical scheme, the human body sensing sensor is installed, the personnel condition of the elevator call-out floor is detected in real time, and if it is detected that the personnel leave, the corresponding call-out request is automatically canceled. By means of the innovative technology, invalid floor stopping can be effectively reduced, the elevator running efficiency is improved, energy consumption is reduced, and the elevator taking experience and satisfaction degree of users can be improved.

Description

Technical Field

[0001] The present invention relates to the field of elevators, and in particular to an elevator outbound call automatic cancellation system and an implementation method thereof. Background Art

[0002] As an important part of modern high-rise buildings, the elevator system is mainly composed of drive devices, control systems, cars, hoistways and safety devices. Its basic working principle is to drive the traction wheel through the motor, so that the wire rope drives the car and counterweight to move up and down, thereby realizing the vertical transportation of passengers or goods.

[0003] The current management and dispatching methods of elevator systems mainly rely on preset control algorithms, which are usually based on simple logical rules, such as first-come-first-served, shortest waiting time, etc. However, these traditional dispatching methods have many problems in practical applications, especially when dealing with outbound call requests during peak hours, which easily leads to frequent invalid stops. This not only wastes the running time and electricity of the elevator, but also increases the waiting time of other passengers, reducing the overall efficiency of the system. As an important part of modern high-rise buildings, the elevator system is mainly composed of drive devices, control systems, cars, hoistways and safety devices. Its basic working principle is to drive the traction sheave through the motor, so that the wire rope drives the car and counterweight up and down, thereby realizing the vertical transportation of passengers or goods. Summary of the invention

[0004] The main purpose of the present invention is to provide an elevator outbound call automatic cancellation system and an implementation method thereof, which can effectively solve the problems in the background technology.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] An elevator outbound call automatic cancellation system, comprising:

[0007] Sensors, used to detect personnel status in real time;

[0008] Signal processing module: The signals collected by the sensor are preliminarily processed and filtered by the signal processing module to filter out environmental noise and interference and extract effective personnel detection information;

[0009] The control unit is responsible for receiving the processed sensor signal and deciding whether to cancel the outbound call request according to the preset control logic;

[0010] The specific steps are:

[0011] S1, signal acquisition, the presence of personnel on the outbound call floor is collected in real time through sensors, and the analog signal is transmitted to the signal processing module, which performs analog-to-digital conversion, filtering and amplification on the signal to ensure the accuracy and reliability of the signal;

[0012] S2, data processing, the signal processing module transmits the processed digital signal to the control unit, and the control unit further analyzes and processes the data. The data processing includes noise filtering, signal enhancement and feature extraction to ensure that the system can accurately identify the presence of people;

[0013] S3, control logic: The control unit determines whether to cancel the outbound call request based on the processed data, wherein the control logic includes the following steps:

[0014] a. Status detection: Real-time monitoring of the status of personnel on the outbound call floor. If it is detected that the personnel have left, the outbound call cancellation logic is entered;

[0015] b. Time window judgment: Set a time window. If no person is detected to return within the time window, the outbound call request will be canceled to avoid erroneous cancellation caused by misoperation or short-term absence;

[0016] c. Cancel the outbound call request: When no person is detected returning within the time window, the control unit sends an outbound call cancellation instruction to the elevator control system to cancel the corresponding outbound call request.

[0017] Preferably, the sensor is arranged next to the outbound call button on each floor.

[0018] Preferably, the sensor is any one of an infrared sensor, an ultrasonic sensor or a millimeter wave radar.

[0019] Preferably, the signal processing module includes an analog-to-digital converter, a filter and an amplifier.

[0020] Preferably, the control unit is composed of a microprocessor or a single-chip microcomputer, with a built-in control algorithm and logic judgment program.

[0021] At the same time, the present application also provides a method for implementing an elevator outbound call automatic cancellation system, which is implemented through the above-mentioned automatic cancellation system.

[0022] Compared with the prior art, the present invention provides an automatic cancellation system for elevator outbound calls and its implementation method, which has the following beneficial effects: the technical solution installs a human perception sensor to detect the personnel situation on the elevator outbound call floor in real time, and automatically cancels the corresponding outbound call request if it is detected that the personnel has left. This innovative technology can not only effectively reduce invalid floor stops, improve elevator operation efficiency, and reduce energy consumption, but also improve users' elevator riding experience and satisfaction. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0024] An elevator outbound call automatic cancellation system includes: a sensor for real-time detection of personnel status, and a sensor type suitable for the elevator environment, such as an infrared sensor, an ultrasonic sensor, or a millimeter-wave radar. These sensors are installed near each outbound call button to monitor the presence of personnel in real time. The infrared sensor identifies whether a person is on the outbound call floor by detecting infrared radiation emitted by the human body, the ultrasonic sensor detects the movement of an object by emitting and receiving sound wave signals, and the millimeter-wave radar uses electromagnetic waves for high-precision detection;

[0025] Signal processing module: The signals collected by the sensor are preliminarily processed and filtered by the signal processing module to filter out environmental noise and interference and extract effective personnel detection information. The signal processing module usually includes components such as analog-to-digital converters, filters, and amplifiers;

[0026] The control unit is responsible for receiving the processed sensor signal and deciding whether to cancel the outbound call request according to the preset control logic. The control unit is usually composed of a microprocessor or a single-chip microcomputer with a built-in control algorithm and logic judgment program;

[0027] The specific steps are:

[0028] S1, signal acquisition, the presence of personnel on the outbound call floor is collected in real time through sensors, and the analog signal is transmitted to the signal processing module, which performs analog-to-digital conversion, filtering and amplification on the signal to ensure the accuracy and reliability of the signal;

[0029] S2, data processing, the signal processing module transmits the processed digital signal to the control unit, and the control unit further analyzes and processes the data. The data processing includes noise filtering, signal enhancement and feature extraction to ensure that the system can accurately identify the presence of people;

[0030] S3, control logic: The control unit determines whether to cancel the outbound call request based on the processed data, wherein the control logic includes the following steps:

[0031] a. Status detection: Real-time monitoring of the status of personnel on the outbound call floor. If it is detected that the personnel have left, the outbound call cancellation logic is entered;

[0032] b. Time window judgment: Set a time window. If no person is detected to return within the time window, the outbound call request will be canceled to avoid erroneous cancellation caused by misoperation or short-term absence;

[0033] c. Cancel the outbound call request: When no person is detected returning within the time window, the control unit sends an outbound call cancellation instruction to the elevator control system to cancel the corresponding outbound call request.

[0034] Since sensor selection is critical, a suitable human sensing sensor should have the following key criteria:

[0035] Sensitivity: The sensitivity of a sensor determines how accurately it can detect human presence. Highly sensitive sensors are able to discern small movements and changes, ensuring that the presence of people can be accurately detected even in low-activity environments.

[0036] Response time: Fast response is required, especially during peak hours when elevators are running frequently. The ideal response time should be in milliseconds to ensure that sensors can monitor and react in real time to avoid delays and misoperation.

[0037] Detection range: The sensor should be able to cover the area near the outbound call button, usually including a few meters in front and a certain angle on the left and right sides. A detection range that is too small will lead to missed detection, and a detection range that is too large will increase the probability of false detection.

[0038] Anti-interference ability: The sensor should have good anti-interference ability to avoid factors such as ambient light changes and electromagnetic interference affecting its normal operation.

[0039] At the same time, a reasonable sensor installation location is the key to ensuring the effectiveness of the outbound call automatic cancellation system. The following are common installation location designs:

[0040] Outcall panel: Installing sensors near the outcall buttons on each floor is the most direct and effective solution. The sensors can detect in real time whether the person waiting for the elevator has left, so as to quickly make a decision to cancel the outcall request.

[0041] Hall roof: Installing sensors on the top of the elevator hall can cover a wider detection range and avoid the risk of accidental collision and damage by passengers. This location is suitable for installing ultrasonic sensors or millimeter wave radars with a large detection range.

[0042] Wall or ceiling: Installing sensors on the wall or ceiling on the elevator door side can monitor people's activities from different angles and increase detection accuracy.

[0043] Furthermore, in order to achieve the best coverage and reduce blind spots, the sensor layout needs to be carefully designed and optimized. Here are some optimization strategies:

[0044] Multi-sensor combination: Multiple sensors are arranged in combination to cover different directions and heights. For example, infrared sensors are installed near the outbound call button, and ultrasonic sensors are installed on the ceiling of the hall to ensure that people can be accurately detected no matter where they stand.

[0045] Overlapping coverage: Overlapping coverage is used in key areas to ensure that there are no blind spots. Overlapping coverage can be achieved by adjusting the installation angle and position of the sensor so that the detection range of each sensor overlaps, increasing the reliability of detection.

[0046] Dynamic adjustment: The sensitivity and detection range of the sensor are dynamically adjusted according to actual usage. For example, the sensitivity and detection range can be increased during peak hours, while they can be reduced during low hours to reduce false alarms.

[0047] Environmental adaptability test: Perform environmental adaptability test before installation to evaluate the performance of the sensor under different light, temperature and humidity conditions, and make corresponding adjustments and optimizations based on the test results.

[0048] The acquisition of sensor signals is the first step of the outbound call automatic cancellation system, which determines the basis for subsequent data processing and decision-making. Different types of sensors, such as infrared sensors, ultrasonic sensors, and millimeter-wave radars, have different signal acquisition methods. The following is a general acquisition process and interface design:

[0049] Sensor signal acquisition method:

[0050] Infrared sensor: detects infrared radiation emitted by the human body and outputs an analog voltage signal. The acquisition circuit converts the analog signal into a digital signal through an analog-to-digital converter (ADC).

[0051] Ultrasonic sensor: emits ultrasonic waves and receives reflected waves, calculates distance by measuring time difference, and outputs pulse signals or analog voltage signals, which are converted into digital signals through ADC interface.

[0052] Millimeter-wave radar: emits millimeter-wave signals and receives echoes, calculates distance and speed through frequency shift and time difference, and outputs digital or analog signals.

[0053] The sensor is connected to the signal processing module through a dedicated interface such as I2C, SPI or UART.

[0054] Analog sensors require an analog-to-digital converter (ADC), while digital sensors can be connected directly through a digital interface.

[0055] Sensor interface design needs to consider signal integrity, anti-interference and real-time performance.

[0056] The collected sensor signals usually contain noise and interference, which need to be filtered and denoised to ensure the accuracy and reliability of the signals. The following are commonly used signal processing techniques:

[0057] Low-pass filter: used to remove high-frequency noise and retain low-frequency signals. Commonly used low-pass filters include RC filters and digital low-pass filters (such as FIR filters).

[0058] Moving average filtering: A simple and effective denoising method that smoothes out short-term noise by calculating the average value of the signal over a period of time.

[0059] Kalman filter: An advanced filtering technology used for real-time signal processing. It estimates the state of the system in a recursive manner and is suitable for processing dynamically changing signals.

[0060] Median filter: Removes spike noise and sudden change interference by selecting the median of the signal over a period of time.

[0061] After receiving the sensor signal, the signal processing module first performs filtering and denoising to extract effective personnel detection information, and then transmits it to the control unit for further analysis and processing.

[0062] The core of the outbound call automatic cancellation system is the design of the logic algorithm, including the steps of button pressing, timer starting, personnel leaving detection and call cancellation. The following is the detailed algorithm design process:

[0063] Key press detection: When a passenger presses the outbound call button, the system records the key press event and starts the timer at the same time. The key press event triggers the sensor to monitor the passenger status.

[0064] Timer start: The timer is used to set an observation window. During this time window, the system continuously monitors the status of personnel on the outbound call floor. If the person leaves before the timer expires, the next step of logic will be continued.

[0065] Personnel departure detection: The sensor monitors the status of personnel on the outbound call floor in real time. If the sensor detects that a person has left within the time window set by the timer, the outbound call cancellation logic is entered. Specific detection methods include: Infrared sensor: Continuously monitor the changes in infrared radiation intensity. When the radiation intensity is lower than the preset threshold, it is determined that the person has left.

[0066] Ultrasonic sensor: monitors the distance change of the return signal, and determines that the person has left when the distance exceeds the preset range.

[0067] Millimeter-wave radar: Determines whether a person has left by changing the frequency shift and time difference of the signal.

[0068] Call cancellation: After detecting that a person has left within the time window of the timer, the control unit sends an outbound call cancellation command to the elevator control system. The specific steps include: Cancel timer: Stop the timer to avoid repeated triggering.

[0069] Send a cancel command: Send a command to cancel the outbound call request to the elevator main controller through the control interface (such as CAN bus, RS485 or other).

[0070] Of course, using an automatic outbound call cancellation system may introduce potential security issues:

[0071] False cancellation: The passenger has not left but is mistakenly identified as having left, causing the outbound call request to be cancelled and the passenger needs to call again.

[0072] Not canceled: The person has left but the outbound call request has not been canceled, causing the elevator to stop at an invalid floor.

[0073] To address potential problems, the following security measures are available:

[0074] Multiple detection: Use multiple sensors (such as infrared, ultrasonic, and millimeter-wave radar) for joint detection, cross-verify personnel status, and reduce the probability of false alarms from a single sensor.

[0075] Redundant design: Redundant systems are designed at key nodes to switch to backup systems when the main system fails to ensure continuous operation.

[0076] Sensor false alarm and missed alarm processing:

[0077] Signal cross-validation: Improve detection accuracy through signal cross-validation of different types of sensors.

[0078] Error correction: Use historical data and pattern recognition algorithms to perform error correction and reduce false positives and negatives.

[0079] System reliability test:

[0080] Long-term operation test: Run the system uninterruptedly for a long time in a simulated real environment to verify system stability.

[0081] Extreme condition testing: Testing under extreme conditions such as high temperature, low temperature, and high humidity to ensure that the system can work normally in any environment.

[0082] Reliability results analysis:

[0083] Failure rate: Regularly count the number of system failures, analyze the causes of failures, and optimize system design.

[0084] MTBF (Mean Time Between Failures): The average time between failures of the system is calculated through long-term running tests. The target value should be more than tens of thousands of hours to ensure high reliability of the system.

[0085] The automatic cancellation technology of outbound calls in this application can effectively reduce invalid stops, improve elevator operation efficiency, save energy consumption, and has significant practical application value. The system ensures the accuracy and reliability of detection through multi-sensor fusion and advanced algorithm design, providing a new idea for intelligent elevator management.

Claims

1. An automatic cancellation system for elevator outbound calls, Features ,include: Sensors, used to detect personnel status in real time; Signal processing module: The signals collected by the sensor are preliminarily processed and filtered by the signal processing module to filter out environmental noise and interference and extract effective personnel detection information; The control unit is responsible for receiving the processed sensor signal and deciding whether to cancel the outbound call request according to the preset control logic; The specific steps are: S1, signal acquisition, the presence of personnel on the outbound call floor is collected in real time through sensors, and the analog signal is transmitted to the signal processing module, which performs analog-to-digital conversion, filtering and amplification on the signal to ensure the accuracy and reliability of the signal; S2, data processing, the signal processing module transmits the processed digital signal to the control unit, and the control unit further analyzes and processes the data. The data processing includes noise filtering, signal enhancement and feature extraction to ensure that the system can accurately identify the presence of people; S3, control logic: The control unit determines whether to cancel the outbound call request based on the processed data, wherein the control logic includes the following steps: a. Status detection: Real-time monitoring of the status of personnel on the outbound call floor. If it is detected that the personnel have left, the outbound call cancellation logic is entered; b. Time window judgment: Set a time window. If no person is detected to return within the time window, the outbound call request will be canceled to avoid erroneous cancellation caused by misoperation or short-term absence; c. Cancel the outbound call request: When no person is detected returning within the time window, the control unit sends an outbound call cancellation instruction to the elevator control system to cancel the corresponding outbound call request.

2. An elevator outbound call automatic cancellation system according to claim 1, Features: The sensor is arranged beside the outbound call button on each floor.

3. An elevator outbound call automatic cancellation system according to claim 1, Features: The sensor is any one of an infrared sensor, an ultrasonic sensor or a millimeter wave radar.

4. The elevator outbound call automatic cancellation system according to claim 1, Features: The signal processing module includes an analog-to-digital converter, a filter and an amplifier.

5. The elevator outbound call automatic cancellation system according to claim 1, Features: The control unit is composed of a microprocessor or a single-chip microcomputer, and has a built-in control algorithm and a logic judgment program.

6. A method for implementing an automatic cancellation system for elevator outbound calls. It is characterized in that This is achieved by the automatic cancellation system described in any one of claims 1-5.