CA3105970A1 - Contactless button of elevator - Google Patents

Abstract

Buttons on elevators are operated by touching, which is known as one of the main ways of spreading virus. The device comprises a button panel, a piece of glass pane, infrared sensors, optical sensors, buttons, and a controller. In this invention, an activating signal is recognized by the optical sensor when the operator seeks a finger close to the optical sensor and is transmitd to the elevator button system. In this way, users are able to operate the elevator without contacting any button.

Description

CONTACTLESS ELEVATOR BUTTON SYSTEM
This invention relates to contactless switch device for operating elevators.
BACKGROUND OF THE INVENTION
Most of elevators utilize the mechanical buttons, others use touch screens. A
button can be touched hundreds and thousands of times by different operators. As time passes, bacteria accumulate on the button, which can further transmit from one operator to another. This problem can be overcome by applying contactless buttons. Buttons are equipped with an optical sensor, and all of the buttons are covered by a piece of glass pane. An infrared sensor placed on the glass pane can detect temperature of the close-by object. As the infrared detects an object that has a temperature close to body temperature, it activates the optical sensors. Then, each of the optical sensors will detect the distance between itself and the object; when the object is closer than a threshold value, a signal will be sent to the elevator's control button and activate the button.
SUMMARY OF THE INVENTION
A contactless elevator button device comprises a button panel, an infrared sensor, a piece of glass pane, optical sensors, buttons, and a controller. Buttons are fixed on the button panel, and each button is equipped with a corresponding optical sensor. The glass pane equipped with an infrared sensor covers the surface of the button panel. Optical sensors and the infrared sensor are connected with the controller. The controller contains a printed circuit board which has a memory, a single chip computer, a micro relay, and a power supply on it. The power supply is parallelly connected to all other electronic components in the contactless elevator button system.
The output of infrared sensor connects to the input of single chip computer. The output of single chip computer connects to the power of the optical sensor and control if the optical sensor is powered on or off. The output of optical sensor connects to the input of the micro relay. The output of the micro relay connects to the elevator control system outside of the controller.
In the drawings, which form a part of this specification, Figure 1 is a semi-diagrammatic drawing of the entire contactless button system;
Figure 2 is a detailed view of controller's inside, on larger scale than Figure 1;
Date Recue/Date Received 2021-01-19 Figure 3 is a flow chart of contactless button system.
DETAILED DESCRIPTION OF THE INVENTION
As Error! Reference source not found. illustrates, the device comprises buttons 3 which are equipped with optical sensors 4 are inset on the button panel 5. The glass pane 2 equipped with an infrared sensor 1 is placed on the surface of button panel 5 as a cover.
Optical sensors 4 and the infrared sensor 1 sense operators' commands, and connect to the controller 6.
Error! Reference source not found. is a detailed view of controller 6 in Error! Reference source not found.. There is a printed circuitboard 26 inside the controller shell 21.
A single chip computer 24, a memory 25, a power supply 23, and a micro relay 22 are welded on the printed circuit board 26. The memory 25 serves the single chip computer 24. The output of infrared sensor 1 connects to the input of single chip computer 24. The output of the single chip computer connects to the power of optical sensors 4, and controls if optical sensors are powered on or off. The output of optical sensors connects to the input of the micro relay. The output of the micro relay connects to the input of the elevator control system. The power supply is connected parallelly to the micro relay, the single chip computer, the infrared sensor and optical sensors, and supplies a constant direct current for this circuit.
As the infrared sensor 1 detects an object with body temperature, it will send a signal to the single chip computer 24 which then activates the optical sensors 4 to the operating state. The optical sensors 4 sends light to the object and senses the reflection from the object.
With a constant transmitting speed of light, the optical sensor 4 can determine the distance between itself and the object by counting time period between sending and receiving the light. A
threshold distance can be manually set for each optical sensor. A signal will be sent to the micro relay 22 if the distance to the object is closer than the threshold distance. Then, the micro relay 22 will send current to the elevator control system which activates the corresponding command to operate the elevator. As a result, the operators can control the elevator without touching or pressing a button.
Date Recue/Date Received 2021-01-19

Claims (3)

CLAIM
The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:

1. A contactless button device comprises a button panel, an infrared sensor, a piece of glass pane, optical sensors, buttons, and a controller. Each button equippedwith an optical sensor is set on the button panel. The glass pane equipped with an infrared sensor covers the surface of the button panel. Optical sensors and the infrared sensor are connected with the controller. The controller contains a printed circuit board which has a memory, a single chip computer, a micro relay, and a power supply on it.

2. The contactless button in claim 1 wherein said the output of infrared sensor connects to the input of single chip computer. The output of single chip computer connects to the power input of optical sensors. The output of optical sensors connects to the input of the micro relay. The output of the micro relay connects to the elevator control system.

3. The contactless button in claim 1 wherein said the single chip computer is a 51 single chip computer.
Date Recue/Date Received 2021-01-19