Elevator call device based on ToF

Abstract

This utility model discloses an elevator call device based on Time-of-Flight (ToF) technology, belonging to the field of elevator control equipment technology. It includes a housing with a sensor window extending through its front end and a projection window extending through its front end near the upper edge. This utility model, through the cooperation of a projection display module and a ToF sensor module, fundamentally eliminates direct contact between the user and the device surface using non-contact ToF technology. Compared to traditional contact-based elevator call devices, it effectively reduces the transmission routes of bacteria and viruses, significantly lowering the risk of cross-infection between patients. In places with high population mobility, it provides users with a safer and healthier elevator environment, meeting the growing demand for public health and safety.

Description

Technical Field

[0001] This utility model relates to the field of elevator control equipment technology, and in particular to an elevator external call device based on ToF. Background Technology

[0002] In modern buildings, elevators are an indispensable vertical transportation tool, and the performance of their call buttons is closely related to user experience and hygiene safety. Traditional elevator call buttons mostly use physical buttons, requiring users to press them directly to select their destination floor or call the elevator. This method has significant drawbacks: from a hygiene perspective, elevator buttons in public places can harbor over 1700 bacteria per square centimeter. In densely populated areas such as hospitals, shopping malls, and office buildings, frequent contact makes elevator buttons a significant medium for the spread of bacteria and viruses. Viruses such as influenza and norovirus can be transmitted through hands after touching the buttons, increasing the risk of cross-infection.

[0003] However, in existing technologies, frequent contact in densely populated areas can easily lead to the spread of bacteria and viruses, posing hygiene risks. Secondly, physical buttons are prone to wear, loosening, and poor contact due to prolonged pressing, resulting in a significant increase in the annual failure rate of physical button-type external call devices. This not only affects the normal use of elevators but also significantly increases maintenance costs due to frequent repairs. Furthermore, traditional external call devices have relatively limited functions and cannot meet people's needs for a smart and convenient elevator experience. Utility Model Content

[0004] The purpose of this invention is to solve the problems existing in the prior art by proposing a ToF-based elevator call device.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: an elevator call device based on Time of Flight (ToF), comprising a housing, a sensor window extending through the front end of the housing, and a projection window extending through the front end of the housing near the upper edge. Inside the housing, from top to bottom, a projection display module, a control circuit module, a ToF sensor module, and a power supply module are sequentially fixedly installed. The projection display module is positioned opposite to the projection window and is used to project elevator button images into the air to form a virtual operating interface. The ToF sensor module is positioned opposite to the sensor window and is used to detect user gesture information. The power supply module provides a stable power supply to the projection display module, the ToF sensor module, and the control circuit module.

[0006] Preferably, the control circuit module is electrically connected to the projection display module, the ToF sensor module, and the power supply module, respectively.

[0007] Preferably, the control circuit module includes a communication module and a microprocessor, and a mounting plate is fixedly installed inside the housing. One end of the communication module and the microprocessor are both fixed to one end of the mounting plate.

[0008] Preferably, the projection display module includes a projection light source, an optical imaging component, and a driving circuit. A second mounting plate is fixedly installed inside the housing, and one end of the projection light source, the optical imaging component, and the driving circuit are all fixed to one end of the second mounting plate.

[0009] Preferably, a status indicator light is installed at the front end of the housing, and the status indicator light is electrically connected to the control circuit module.

[0010] Preferably, a heat dissipation mechanism is also installed through one end of the outer casing, and a removable filter screen is installed at the other end of the outer casing.

[0011] Preferably, a guide plate is fixedly installed inside the outer shell and at the upper end of the heat dissipation mechanism, and multiple sets of heat dissipation holes are opened through the other end of the outer shell and the end near the filter plate.

[0012] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0013] 1. In this utility model, by combining the projection display module with the ToF sensor module, the non-contact ToF technology fundamentally eliminates direct contact between the user and the device surface. Compared with traditional contact-type elevator call devices, it can effectively reduce the transmission routes of bacteria and viruses and significantly reduce the risk of cross-infection between patients. In some places with high personnel mobility, it can provide users with a safer and healthier elevator environment, which meets people's growing demand for public health and safety.

[0014] 2. In this utility model, the ToF sensor chip in the ToF sensor module has sub-millimeter-level high-precision ranging capability, which can quickly and accurately capture subtle changes in the user's gestures. Whether it is a simple click or swipe, or a complex combination of gestures, it can accurately recognize them. Combined with the high-performance microprocessor and optimization algorithm in the control circuit module, it realizes a "zero-delay" experience from gesture operation to elevator response, which greatly improves the efficiency of elevator use and reduces the waiting time for users. Especially during the morning and evening peak hours, it can significantly improve the carrying capacity and passage efficiency of the elevator.

[0015] 3. In this utility model, the projection display module can flexibly project virtual button images to meet diverse needs; the status indicator light provides real-time feedback on the status of the equipment and elevator, making it convenient for users to understand the information; the communication module supports multiple transmission methods and is compatible with different elevator control systems. Attached Figure Description

[0016] Figure 1 A three-dimensional structural diagram of an elevator external call device based on ToF is provided for this utility model;

[0017] Figure 2 This utility model proposes a top-rear view of an elevator call device based on ToF.

[0018] Figure 3 This utility model presents a schematic diagram of the rear structure of the outer shell of an elevator external call device based on ToF.

[0019] Figure 4 This invention presents a system diagram of an elevator external call device based on ToF.

[0020] Legend: 1. Outer shell; 2. Heat dissipation mechanism; 3. Filter plate; 4. Sensor window; 5. Projection window; 6. Status indicator light; 7. Control circuit module; 71. Mounting plate 1; 72. Communication module; 73. Microprocessor; 8. Projection display module; 81. Mounting plate 2; 82. Projection light source; 83. Optical imaging component; 84. Drive circuit; 9. Guide plate; 10. ToF sensor module; 11. Power module; 12. Heat dissipation holes. Detailed Implementation

[0021] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0023] Example 1: As Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, this utility model provides an elevator call device based on ToF, including a housing 1. A sensor window 4 is provided through the front end of the housing 1, and a projection window 5 is provided through the front end of the housing 1 near the upper edge. Inside the housing 1, from top to bottom, a projection display module 8, a control circuit module 7, a ToF sensor module 10, and a power module 11 are fixedly installed. The projection display module 8 is arranged opposite to the projection window 5 and is used to project the elevator button image into the air to form a virtual operation interface. The ToF sensor module 10 is arranged opposite to the sensor window 4 and is used to detect user gesture information. The power module 11 is used to provide a stable power supply to the projection display module 8, the ToF sensor module 10, and the control circuit module 7. The control circuit module 7 is electrically connected to the projection display module 8, the ToF sensor module 10, and the power module 11 respectively.

[0024] The control circuit module 7 includes a communication module 72 and a microprocessor 73. A mounting plate 71 is fixedly installed inside the housing 1. One end of the communication module 72 and the microprocessor 73 are both fixed to one end of the mounting plate 71. The microprocessor 73 is used to receive and process the gesture information transmitted by the ToF sensor module 10, and the communication module 72 is used to transmit the processed gesture information to the elevator control system wirelessly or via wire.

[0025] The projection display module 8 includes a projection light source 82, an optical imaging component 83, and a driving circuit 84. A second mounting plate 81 is fixedly installed inside the housing 1. One end of the projection light source 82, the optical imaging component 83, and the driving circuit 84 are all fixed to one end of the second mounting plate 81. The projection light source 82 emits light under the control of the driving circuit 84. The optical imaging component 83 processes the light and projects it into the air through the projection window 5 to form a virtual button image. The ToF sensor module 10 includes a ToF sensor chip and a signal processing circuit. The ToF sensor chip is used to emit and receive infrared light pulses to measure distance. The signal processing circuit is used to process the signals collected by the ToF sensor chip and transmit them to the control circuit module 7.

[0026] A status indicator light 6 is installed at the front end of the outer casing 1. The status indicator light 6 is electrically connected to the control circuit module 7 and is used to display the working status of the equipment and the running status of the elevator.

[0027] The specific settings and functions of this embodiment are described in detail below. The front end of the outer shell 1 is precisely designed with a sensor window 4 and a projection window 5 through it. The position and size of the sensor window 4 are precisely planned according to the detection angle and effective range of the ToF sensor module 10, ensuring that the ToF sensor module 10 can emit and receive infrared light pulses without obstruction and accurately capture the user's gesture information. The projection window 5 is precisely aligned with the projection display module 8. Its light-transmitting material has undergone special optical treatment to ensure that the elevator button image projected by the projection display module 8 is clear and undistorted, thereby forming a stable and intuitive virtual operation interface in the air.

[0028] The outer casing 1 houses a layered modular installation system, with the projection display module 8, control circuit module 7, ToF sensor module 10, and power module 11 sequentially and fixedly installed from top to bottom. It adopts efficient and stable power conversion technology, which can convert the external input power into the precise voltage and current required by each module, providing a continuous and stable power supply for the projection display module 8, ToF sensor module 10, and control circuit module 7, ensuring the reliable operation of the equipment. Through complex and orderly electrical connections, it achieves precise control and efficient signal transmission of other modules, coordinating the collaborative work of each module.

[0029] Inside the control circuit module 7, the mounting plate 71 provides stable support and a reasonable layout. The communication module 72 and the microprocessor 73 are tightly fixed to the mounting plate 71. The two have a clear division of labor and work together seamlessly. The microprocessor 73 is equipped with a high-performance processing chip and optimized algorithm program, which can analyze, process and recognize the gesture information transmitted by the ToF sensor module 10 at an extremely fast speed, and accurately determine the user's operation intention. The communication module 72 supports multiple communication protocols such as Bluetooth, Wi-Fi, and RS-485. It can flexibly select wireless or wired transmission methods according to the interface requirements of different elevator control systems, and stably and quickly transmit the gesture information processed by the microprocessor 73 to the elevator control system to realize remote and precise control of the elevator.

[0030] The projection display module 8 is firmly installed inside the housing 1 using the second mounting plate 81. Its internal structure is ingenious and powerful. Under the precise control of the driving circuit 84, the projection light source 82 can emit light with uniform brightness and accurate color. The driving circuit 84 ensures the stable operation of the projection light source 82 by monitoring and adjusting parameters such as current and voltage in real time. The optical imaging component 83 is composed of multiple high-precision optical lenses and lenses. Through complex optical refraction and reflection principles, it corrects, focuses and magnifies the light emitted by the projection light source 82, and finally projects a clear, realistic virtual button image with a good interactive experience through the projection window 5.

[0031] The core component of the ToF sensor module 10, the ToF sensor chip, adopts advanced time-of-flight measurement technology, which can transmit and receive infrared light pulses at extremely high frequencies to accurately measure the distance between the object and the sensor. The signal processing circuit is equipped with a high-speed analog-to-digital converter chip and intelligent signal processing algorithms, which can quickly and accurately perform digital conversion and analysis on the analog signals collected by the ToF sensor chip, remove noise interference, extract effective information, and stably transmit the processed signal to the control circuit module 7.

[0032] Status indicator light 6 is installed on the front end of the outer casing 1. This indicator light is electrically connected to the control circuit module 7. The status indicator light 6 can intuitively display the working status of the equipment, such as normal operation, fault alarm, etc., as well as the operating status of the elevator, through different color and flashing frequency light combinations according to the instructions transmitted by the control circuit module 7.

[0033] Example 2: Figure 1 , Figure 2 and Figure 3 As shown, a heat dissipation mechanism 2 is installed through one end of the outer shell 1, and a detachable filter plate 3 is installed at the other end of the outer shell 1. A guide plate 9 is fixedly installed inside the outer shell 1 and above the heat dissipation mechanism 2. Multiple sets of heat dissipation holes 12 are opened through the other end of the outer shell 1 and the end near the filter plate 3.

[0034] The overall effect of this embodiment is that a high-efficiency heat dissipation mechanism 2 is installed through one end of the outer shell 1. The heat dissipation mechanism 2 adopts a fan cooling method, which can be flexibly selected according to the power of the equipment and the usage environment. A detachable filter plate 3 is installed at the other end. The filter is made of high-density and high-breathability material, which can effectively block dust and debris from entering the equipment, while not affecting air circulation.

[0035] The air guide plate 9 located at the upper end of the heat dissipation mechanism 2 inside the outer shell 1 is specially aerodynamically designed to guide air to flow along a predetermined path, enhancing the air convection effect. Multiple sets of heat dissipation holes 12 are opened through the outer shell 1 near the filter screen 3. The size and arrangement of the holes have been scientifically calculated and optimized to ensure that air can smoothly enter and exit the equipment. Together with the heat dissipation mechanism 2, the filter screen 3 and the air guide plate 9, they form an efficient and stable heat dissipation system, effectively reducing the operating temperature of each module inside the equipment and ensuring the stability and reliability of the equipment under long-term, high-load operation.

[0036] The usage method and working principle of this device are as follows: First, the projection display module 8 starts working. The drive circuit 84 precisely controls the projection light source 82 according to the preset program and parameters, driving the projection light source 82 to emit light. After the light enters the optical imaging component 83, multiple high-precision optical lenses and lenses in the optical imaging component 83 organize the light into an image beam that meets the requirements. Finally, the light is projected into the air through the projection window 5 to form a clear and stable virtual elevator button operation interface, providing users with a visual interactive window.

[0037] Next, when the user makes gestures such as clicking, waving, or swiping to operate the virtual button, the ToF sensor module 10 starts to function. By accurately measuring the time it takes for light to travel from emission to reception, it can accurately calculate the distance between the user's hand and the ToF sensor chip.

[0038] After acquiring distance information, the signal processing circuit in the ToF sensor module 10 begins to process the analog signal collected by the ToF sensor chip. The signal processing circuit first converts the analog signal into a digital signal through a high-speed analog-to-digital converter chip, and then uses an intelligent signal processing algorithm to remove noise interference in the signal and extract effective gesture information. The processed gesture information is stably transmitted to the control circuit module 7.

[0039] After the control circuit module 7 receives the gesture information transmitted by the ToF sensor module 10, the microprocessor 73 starts to work, quickly parses, processes and recognizes the input gesture information. The microprocessor 73 compares the received gesture information with the preset instruction rules to determine the user's operation intention, such as calling the elevator, selecting a specific floor, or performing other function operations.

[0040] After receiving instructions from the external call device, the elevator control system performs corresponding operations according to the instructions, such as controlling the elevator car to go to the user's floor for stopping, or scheduling the operation according to the floor selected by the user.

[0041] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the technical solution of this utility model shall still fall within the protection scope of this utility model.

Claims

1. A ToF-based elevator external call device, comprising a housing (1), characterized in that: A sensor window (4) is provided through the front end of the outer shell (1), and a projection window (5) is provided through the front end of the outer shell (1) near the upper edge. The projection display module (8), control circuit module (7), ToF sensor module (10) and power module (11) are fixedly installed inside the outer shell (1) from top to bottom. The projection display module (8) is set opposite to the projection window (5) and is used to project the elevator button image into the air to form a virtual operation interface. The ToF sensor module (10) is set opposite to the sensor window (4) and is used to detect user gesture information. The power module (11) is used to provide a stable power supply to the projection display module (8), ToF sensor module (10) and control circuit module (7).

2. The ToF-based elevator call device according to claim 1, characterized in that: The control circuit module (7) is electrically connected to the projection display module (8), the ToF sensor module (10), and the power supply module (11), respectively.

3. The ToF-based elevator call device according to claim 1, characterized in that: The control circuit module (7) includes a communication module (72) and a microprocessor (73). A mounting plate (71) is fixedly installed inside the outer casing (1). One end of the communication module (72) and the microprocessor (73) are both fixed to one end of the mounting plate (71).

4. The ToF-based elevator call device according to claim 1, characterized in that: The projection display module (8) includes a projection light source (82), an optical imaging component (83), and a driving circuit (84). A second mounting plate (81) is fixedly installed inside the outer casing (1). One end of the projection light source (82), the optical imaging component (83), and the driving circuit (84) are all fixed to one end of the second mounting plate (81).

5. The ToF-based elevator call device according to claim 1, characterized in that: A status indicator light (6) is installed at the front end of the outer casing (1), and the status indicator light (6) is electrically connected to the control circuit module (7).

6. The ToF-based elevator call device according to claim 1, characterized in that: A heat dissipation mechanism (2) is also installed through one end of the outer shell (1), and a detachable filter screen (3) is installed at the other end of the outer shell (1).

7. A ToF-based elevator call device according to claim 6, characterized in that Inside the outer shell (1) and at the top of the heat dissipation mechanism (2), a guide plate (9) is fixedly installed. At the other end of the outer shell (1) and near the filter plate (3), multiple sets of heat dissipation holes (12) are opened through.

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