CN116835402A - Non-contact elevator sensing and controlling device based on photoelectron chip - Google Patents

Abstract

The invention relates to a non-contact elevator sensing and controlling device based on an optoelectronic chip. The non-contact elevator sensing and controlling device based on the photoelectronic chip comprises: the optoelectronic chip is used for emitting optical signals to the outside and receiving the optical signals reflected by the outside objects, and can convert the received optical signals reflected by the outside objects into photocurrent signals; and the singlechip is connected with the photoelectron chip and is used for sending a first control signal to an elevator connected with the singlechip after confirming that the magnitude of the photocurrent signal is in a first threshold range and the duration time of the photocurrent signal is in a second threshold range. The invention realizes non-contact sensing control of the elevator by detecting the optical signal, adopts a two-stage false touch prevention mechanism, reduces the false triggering situation and improves the accuracy and reliability of non-contact sensing.

Description

Non-contact elevator sensing control device based on optoelectronic chips

Technical field

The present invention relates to the field of optical communication technology, and in particular to a non-contact elevator sensor control device based on an optoelectronic chip.

Background technique

Optical communication technology realizes the transmission of information by controlling the on and off of LEDs (light-emitting diodes). The current transmission rate of the most advanced visible light communication can reach Gb/s. Traditional radio signal transmission equipment has many limitations. For example, it is expensive and inefficient. For example, mobile phones have built millions of base stations around the world to enhance mobile phone transmission signals, but most of the energy is consumed in cooling the equipment. The effective utilization efficiency is only 5%. In contrast, optical communication technology essentially transmits information through optical signals. The required transmission equipment only requires LEDs and does not occupy existing frequency band resources. Therefore, it will not interfere with existing frequency band equipment. Mutual interference occurs between them, so that the visible light communication method has good communication quality and confidentiality, and is more green and environmentally friendly. As an alternative to radio frequency communications, optical communications are increasingly valued by universities and research institutions.

In order to avoid cross-infection, most elevators currently use non-contact elevator infection control devices. However, the current non-contact elevator sensor control device is not only high in cost, but also large in size and cannot be installed or hidden in the elevator button housing. In addition, the existing non-contact elevator sensor control device has a high probability of misdetection, which affects the accuracy and reliability of the non-contact elevator sensor control device.

Therefore, how to reduce the cost of non-contact elevator sensing control devices, reduce the size of non-contact elevator sensing control devices, and improve the accuracy and reliability of non-contact elevator sensing control devices, thereby expanding the application of optical communication technology in the field of elevator sensing control Application is a technical problem that needs to be solved urgently.

Contents of the invention

The invention provides a non-contact elevator sensing control device based on an optoelectronic chip, which is used to reduce the cost of the non-contact elevator pole control device, reduce the size of the non-contact elevator sensing control device, and improve the non-contact elevator sensing control device. The accuracy and reliability of the device will expand the application of optical communication technology in the field of elevator induction control.

In order to solve the above problems, the present invention provides a non-contact elevator sensing control device based on optoelectronic chips, including:

An optoelectronic chip, used to emit optical signals to the outside world, receive the optical signals reflected by external objects, and convert the received optical signals reflected by external objects into photocurrent signals;

A single chip microcomputer, connected to the optoelectronic chip, configured to send a signal to the microcontroller connected to the single chip microcomputer after confirming that the magnitude of the photocurrent signal is within the first threshold range and the duration of the photocurrent signal is within the second threshold range. The elevator sends the first control signal.

Optionally, the optoelectronic chip includes at least one gallium nitride quantum well diode. The gallium nitride quantum well diode can emit the optical signal to the outside world and can simultaneously receive the optical signal reflected by external objects.

Optionally, the optoelectronic chip includes a plurality of gallium nitride quantum well diodes arranged in an array, and the light signal emitted by the gallium nitride quantum well diode is a green light signal.

Optional, also includes:

A transimpedance amplifier, connected to the optoelectronic chip, used to amplify and convert the photocurrent signal received from the optoelectronic chip into a photovoltage signal;

A low-pass filter, connected to the transimpedance amplifier, used to filter out noise in the photovoltage signal;

An analog-to-digital converter is connected to the low-pass filter and the microcontroller, and is used to convert the photovoltage signal processed by the low-pass filter into a digital signal and transmit it to the microcontroller.

Optionally, the amplification factor of the transimpedance amplifier is 40 times;

The low-pass filter is used to filter out high-frequency noise greater than 50Hz.

Optionally, it also includes a voltage stabilizer, and a driving circuit electrically connected to the voltage stabilizer, where the voltage stabilizer is used to transmit a constant driving voltage signal to the driving circuit;

The driving circuit is electrically connected to the microcontroller and the optoelectronic chip, and is used to light up or extinguish the gallium nitride quantum well diode in the optoelectronic chip.

Optional, also includes:

A keypad, the keypad includes a plurality of numeric key areas corresponding to a plurality of numbers, a plurality of the gallium nitride quantum well diodes are installed one by one in the plurality of numeric key areas, and a plurality of focused The lenses cover the gallium nitride quantum well diodes one by one;

The microcontroller is connected to all the gallium nitride quantum well diodes and is used to detect the photocurrent signal in each of the gallium nitride quantum well diodes.

Optionally, the second threshold range is 2 seconds to 3 seconds.

The non-contact elevator sensor control device based on an optoelectronic chip provided by the present invention is provided with an optoelectronic chip and a single-chip microcomputer, and uses the optoelectronic chip to emit light signals to the outside world and receive light signals reflected by external objects to determine whether the outside world is sending light signals to the light signal based on the optoelectronic chip. The non-contact elevator sensing control device of the optoelectronic chip sends an operating signal, that is, the present invention realizes non-contact sensing control of the elevator by detecting light signals, realizes the application of optical communication technology in the field of non-contact interaction, and expands the scope of optical communication The application field of technology effectively reduces the chance of cross-infection. At the same time, after confirming that the magnitude of the photocurrent signal is within the first threshold range and the duration of the photocurrent signal is within the second threshold range, the microcontroller sends a first signal to the elevator connected to the microcontroller. The control signal adopts a two-level anti-accidental touch mechanism, which reduces the number of false triggers and improves the accuracy and reliability of non-contact sensing, thus greatly improving the user experience.

Description of the drawings

Figure 1 is a schematic structural diagram of a non-contact elevator sensing control device based on an optoelectronic chip in a specific embodiment of the present invention;

Figure 2 is a schematic flow chart of the non-contact elevator sensing control device based on optoelectronic chips in the specific embodiment of the present invention during operation.

Detailed ways

The specific implementation of the optoelectronic chip-based non-contact elevator sensing control device provided by the present invention will be described in detail below with reference to the accompanying drawings.

This specific embodiment provides a non-contact elevator sensor control device based on an optoelectronic chip. Figure 1 is a schematic structural diagram of the non-contact elevator sensor control device based on an optoelectronic chip in the specific embodiment of the present invention. Figure 2 is a schematic diagram of the non-contact elevator sensor control device based on an optoelectronic chip. A schematic flow chart of the non-contact elevator sensing control device based on optoelectronic chips in the specific embodiment of the invention during operation. As shown in Figures 1 and 2, the non-contact elevator sensing control device based on optoelectronic chips includes:

The optoelectronic chip 10 is used to emit optical signals to the outside world, receive the optical signals reflected by external objects, and convert the received optical signals reflected by external objects into photocurrent signals;

The single-chip computer 11 is connected to the optoelectronic chip 10 and is used to send a signal to the single-chip computer after confirming that the magnitude of the photocurrent signal is within the first threshold range and the duration of the photocurrent signal is within the second threshold range. The elevator connected to 11 sends the first control signal.

The solid arrow in FIG. 1 represents the transmission direction of the optical signal emitted by the optoelectronic chip 10 , and the dotted arrow represents the transmission direction of the optical signal after being reflected by external objects. Specifically, the optoelectronic chip-based non-contact elevator sensing control device is used to control the operation of the elevator. It can be installed inside the elevator connected to it, or can be independently installed outside the elevator. Technology in the art Personnel can choose according to actual needs. The optoelectronic chip 10 can emit the optical signal to the outside world under the control of the microcontroller 11. After the optical signal is emitted to external objects such as the finger 17, it is reflected by the external object such as the finger 17, and the reflected light The signal is received by the optoelectronic chip 10 and a photocurrent signal is generated. Because under the premise that the intensity of the optical signal emitted by the optoelectronic chip 10 is constant, when the distance between the finger and other external objects and the optoelectronic chip 10 is within the preset distance range, the light will be affected by the finger and other external objects. The reflectivity of the signal is maintained within a specific numerical range. Therefore, the intensity of the optical signal reflected by external objects such as fingers received by the optoelectronic chip 10 should be maintained within a specific intensity range (i.e., the third (a threshold range), beyond a specific intensity range, the generation of photocurrent signals may be caused by occlusion by other objects. At the same time, the residence time of external objects such as fingers on the optoelectronic chip-based non-contact elevator sensing control device should be within a specific time range (i.e., the second threshold range). If it exceeds the specific time range, it may The photocurrent signal is generated due to obstruction by objects, which is a misoperation. The microcontroller 11 is used to detect whether the magnitude of the photocurrent signal is within the first threshold range, and at the same time detect whether the duration of generating the photocurrent signal is within the second threshold range, after confirming that the photocurrent signal is generated within the second threshold range. The first control signal is sent to the elevator only after the magnitude of the photocurrent signal is within the first threshold range and the duration of the photocurrent signal is within the second threshold range. The first control signal is used to control The elevator starts running (e.g. ascending or descending). In an example, the preset distance range is a range less than or equal to 1 cm.

This specific embodiment realizes non-contact sensory control of elevators by detecting light signals, realizes the application of optical communication technology in the field of non-contact interaction, expands the application field of optical communication technology, and effectively reduces the probability of cross-infection. At the same time, the single-chip computer 11 only sends a signal to the elevator connected to the single-chip computer 11 after confirming that the magnitude of the photocurrent signal is within the first threshold range and the duration of the photocurrent signal is within the second threshold range. The first control signal adopts a two-level anti-accidental touch mechanism, which reduces the number of false triggers and improves the accuracy and reliability of non-contact sensing, thus greatly improving the user experience.

Optionally, the optoelectronic chip 10 includes at least one gallium nitride quantum well diode. The gallium nitride quantum well diode can emit the optical signal to the outside world and can simultaneously receive the optical signal reflected by external objects. .

Optionally, the optoelectronic chip 10 includes a plurality of gallium nitride quantum well diodes arranged in an array, and the light signal emitted by the gallium nitride quantum well diode is a green light signal.

For example, the optoelectronic chip 10 includes a plurality of gallium nitride quantum well diodes, and the light signal emitted by the gallium nitride quantum well diode is a green light signal. The plurality mentioned in this specific embodiment refers to two or more. Since there is an overlapping area between the emission spectrum and the detection spectrum of the gallium nitride quantum well diode, the gallium nitride quantum well diode can be used as a transmitting end to transmit the optical signal to the outside world, and can also be used as a receiving end to receive the light signal reflected by external objects. The latter optical signal can also serve as a transmitter and a receiver at the same time (that is, while transmitting the optical signal to the outside world, it can also receive the optical signal reflected by external objects). In this specific implementation, each of the gallium nitride quantum well diodes simultaneously serves as a transmitting end to emit the optical signal to the outside world, and at the same time serves as a receiving end to receive the optical signal reflected by external objects, that is, the transmitting end and the receiving end are combined. The two are one. On the one hand, it helps to reduce the size of the optoelectronic chip 10, improve the integration level of the optoelectronic chip 10, and reduce the manufacturing cost of the non-contact elevator sensing control device based on the optoelectronic chip; on the other hand, On the other hand, by arranging multiple gallium nitride quantum well diodes, it is possible to enhance the luminous intensity of the optoelectronic chip 10 and also enhance the receiving integrity of the optoelectronic chip 10 , thereby further improving the non-electronic chip based on the optoelectronic chip. Detection sensitivity and accuracy of contact elevator sensing control devices.

In other specific embodiments, the optoelectronic chip 10 further includes a transmitting end and a receiving end located outside the transmitting end. The transmitting end includes at least one of the gallium nitride quantum well diodes, and the receiving end also At least one of the gallium nitride quantum well diodes is included. The gallium nitride quantum well diode in the transmitting end is used to transmit the optical signal to the outside world, and the gallium nitride quantum well diode in the receiving end is used to receive the light reflected by external objects. Signal. By arranging the transmitting end and the receiving end that are independent of each other in the optoelectronic chip 10, it helps to simplify the circuit structure inside the optoelectronic chip 10 and improve the non-contact elevator sensing control device based on the optoelectronic chip. sensing efficiency.

Optionally, the non-contact elevator sensing control device based on optoelectronic chips also includes:

Transimpedance amplifier 12, connected to the optoelectronic chip 10, is used to amplify and convert the photocurrent signal received from the optoelectronic chip into a photovoltage signal;

A low-pass filter 13 is connected to the transimpedance amplifier 12 and used to filter out noise in the photovoltage signal;

Analog-to-digital converter 14 is connected to the low-pass filter 13 and the single-chip computer 10 and is used to convert the photovoltage signal processed by the low-pass filter into a digital signal and transmit it to the single-chip computer 11 .

Optionally, the amplification factor of the transimpedance amplifier 12 is 40 times;

The low-pass filter 13 is used to filter out high-frequency noise greater than 50 Hz.

Optionally, the non-contact elevator sensor control device based on optoelectronic chips also includes a voltage regulator 16 and a drive circuit 15 electrically connected to the voltage regulator 16. The voltage regulator 16 is used to provide the voltage to the elevator. The driving circuit 15 transmits a constant driving voltage signal;

The driving circuit 15 is electrically connected to the microcontroller 11 and the optoelectronic chip 10 , and is used to light up or extinguish the gallium nitride quantum well diode in the optoelectronic chip 10 .

The following description will take the example that the optoelectronic chip 10 further includes a transmitting end and a receiving end located outside the transmitting end. For example, when the non-contact elevator sensor control device based on optoelectronic chips starts to work, the system is initialized first, and the power supply starts to supply power to each electronic component, and collects the intensity of the external ambient light signal, and then uses the card to Mann filtering filters out ambient light signals to further improve the sensitivity of non-contact sensing. The microcontroller 11 transmits an enable signal to the drive circuit 15 so that the transistors (such as MOS transistors) in the drive circuit 15 are turned on so that the constant voltage in the voltage regulator 16 can pass through the drive circuit. The transistor in 15 is transmitted to the gallium nitride quantum well diode in the emitter end, thereby enabling the gallium nitride quantum well diode in the emitter end to continuously emit constant and uniform brightness to the outside world. The light signal (for example, green light signal). The receiving end periodically collects and receives external light signals. When an external object such as a finger 17 stays above the optoelectronic chip 10 , the optical signal is reflected to the receiving end of the optoelectronic chip 10 after being irradiated on the finger 17 . After the gallium nitride quantum well diode in the receiving end receives the reflected light signal, the photocurrent signal in the gallium nitride quantum well diode in the receiving end will mutate (for example, the The photocurrent signal in the gallium nitride quantum well diode in the receiving end increases suddenly), and the photocurrent signal generated by the gallium nitride quantum well diode in the receiving end is transmitted to the transimpedance Amplifier 12. The transimpedance amplifier 12 amplifies the photocurrent signal into a photovoltage signal and then transmits it to the low-pass filter 13. The low-pass filter 13 filters out high-frequency noise, that is, the low-pass filter 13 Only low frequency signals are allowed to pass. After that, the analog-to-digital converter 14 performs analog-to-digital conversion on the filtered photovoltage signal to form a discrete digital signal, and transmits the digital signal to the single-chip computer 11 , and the single-chip computer 11 converts the digital signal to a discrete digital signal. The signal is analyzed (for example, judging whether the magnitude of the photocurrent signal is within the first threshold range through the digital signal, and judging whether the duration of the photocurrent signal is within the range through the time the digital signal continues to be generated). within the above second threshold range) to determine whether it is a misoperation.

Optionally, the non-contact elevator sensing control device based on optoelectronic chips also includes:

A keypad, the keypad includes a plurality of numeric key areas corresponding to a plurality of numbers, a plurality of the gallium nitride quantum well diodes are installed one by one in the plurality of numeric key areas, and a plurality of focused The lenses cover the gallium nitride quantum well diodes one by one;

The microcontroller 11 is connected to all the gallium nitride quantum well diodes, and is used to detect the photocurrent signal in each of the gallium nitride quantum well diodes.

For example, a correspondence table is stored in the microcontroller 11 , and the correspondence table includes a plurality of numbers and a plurality of gallium nitride quantum well diodes corresponding to the plurality of numbers. The single-chip computer 11 collects the photocurrent signals in all the gallium nitride quantum well diodes in real time or periodically. When the photocurrent signal in one of the gallium nitride quantum well diodes mutates, the single-chip computer 11 detects Whether the gallium nitride quantum well diode where the sudden change occurs is a malfunction (that is, whether the magnitude of the photocurrent signal in the gallium nitride quantum well diode where the photocurrent sudden change occurs is within the first threshold range, and whether the (Whether the time during which the photocurrent signal continues to be generated is within the second threshold range), if it is confirmed that there is no misoperation, then perform a numerical comparison, that is, select the gallium nitride quantum well diode that matches and corresponds to the photocurrent mutation. The number is used as the target number, and the result is output, that is, the elevator sends a first control signal to control the elevator to rise or fall to the floor corresponding to the target number.

The specific value of the first threshold range can be set according to actual needs, for example, according to the external environment (such as external brightness environment) where the optoelectronic chip-based non-contact elevator sensing control device is located, the nitrogen in the optoelectronic chip Factors such as the structure and internal resistance of gallium quantum well diodes. In some embodiments, since the photocurrent signal generated by detection by the gallium nitride quantum well diode is small, whether the photocurrent signal can be determined by detecting the photovoltage signal output by the transimpedance amplifier 12 within the first threshold range to further improve the accuracy and reliability of the photocurrent signal detection. For example, when the photovoltage signal is within the third threshold range, it is confirmed that the photocurrent signal is within the first threshold range. The third threshold range is 120mV～180mV, such as 150mV.

Optionally, the second threshold range is 2 seconds to 3 seconds.

The non-contact elevator sensing control device based on an optoelectronic chip provided in this specific embodiment is provided with an optoelectronic chip and a single-chip microcomputer, and uses the optoelectronic chip to emit light signals to the outside world and receive light signals reflected by external objects to determine whether the outside world is directed to the desired direction. The above-mentioned non-contact elevator sensing control device based on optoelectronic chips sends operating signals, that is, this specific embodiment realizes non-contact sensing control of the elevator by detecting light signals, and realizes the application of optical communication technology in the field of non-contact interaction. It expands the application fields of optical communication technology and effectively reduces the chance of cross-infection. At the same time, after confirming that the magnitude of the photocurrent signal is within the first threshold range and the duration of the photocurrent signal is within the second threshold range, the microcontroller sends a first signal to the elevator connected to the microcontroller. The control signal adopts a two-level anti-accidental touch mechanism, which reduces the number of false triggers and improves the accuracy and reliability of non-contact sensing, thus greatly improving the user experience.

The above are only preferred embodiments of the present invention. It should be noted that those of ordinary skill in the art can also make several improvements and modifications without departing from the principles of the present invention. These improvements and modifications should also be regarded as It is the protection scope of the present invention.

Claims (8)

1. A non-contact elevator sensing and control device based on an optoelectronic chip, which is characterized by comprising:

the optoelectronic chip is used for emitting optical signals to the outside and receiving the optical signals reflected by the outside objects, and can convert the received optical signals reflected by the outside objects into photocurrent signals;

and the singlechip is connected with the photoelectron chip and is used for sending a first control signal to an elevator connected with the singlechip after confirming that the magnitude of the photocurrent signal is in a first threshold range and the duration time of the photocurrent signal is in a second threshold range.

2. The optoelectronic chip-based contactless elevator sensing and control device of claim 1, wherein the optoelectronic chip comprises at least one gallium nitride quantum well diode capable of emitting the optical signal to the outside and capable of simultaneously receiving the optical signal after reflection by an external object.

3. The optoelectronic chip-based non-contact elevator sensing and control device of claim 2, wherein the optoelectronic chip comprises a plurality of the gallium nitride quantum well diodes arranged in an array, and the light signal emitted by the gallium nitride quantum well diodes is a green light signal.

4. The optoelectronic chip-based contactless elevator sensing and control device of claim 2, further comprising:

the transimpedance amplifier is connected with the optoelectronic chip and used for amplifying and converting the received photocurrent signal from the optoelectronic chip into a photovoltage signal;

the low-pass filter is connected with the transimpedance amplifier and is used for filtering noise in the photovoltage signal; and the analog-to-digital converter is connected with the low-pass filter and the singlechip and is used for converting the photovoltage signal processed by the low-pass filter into a digital signal and transmitting the digital signal to the singlechip.

5. The optoelectronic chip-based contactless elevator control of claim 4, wherein the transimpedance amplifier has a magnification factor of 40;

the low pass filter is used for filtering out high frequency noise greater than 50 Hz.

6. The optoelectronic chip-based contactless elevator sensing and control device of claim 2, further comprising a voltage regulator, and a drive circuit electrically connected to the voltage regulator, the voltage regulator configured to transmit a constant drive voltage signal to the drive circuit;

the driving circuit is electrically connected with the singlechip and the photoelectron chip and is used for lighting or extinguishing the gallium nitride quantum well diode in the photoelectron chip.

7. The optoelectronic chip-based contactless elevator sensing and control device of claim 2, further comprising:

the key board comprises a plurality of digital key areas which are in one-to-one correspondence with a plurality of numbers, a plurality of gallium nitride quantum well diodes are arranged in the digital key areas one by one, and a plurality of focusing lenses cover the gallium nitride quantum well diodes one by one;

the singlechip is connected with all the gallium nitride quantum well diodes and is used for detecting the photocurrent signals in the gallium nitride quantum well diodes.

8. The optoelectronic chip-based contactless elevator sensing and control device of claim 1, wherein the second threshold range is 2 seconds to 3 seconds.