CN111367401A - Man-machine interface board and control method, monitoring unit and storage medium thereof - Google Patents

Abstract

The embodiment of the present application discloses a human-machine interface board, a control method thereof, a monitoring unit of a communication power supply, and a storage medium, the human-machine interface board includes a display screen, a gesture recognition sensor and a microprocessor; the gesture recognition sensor obtains the microprocessor issued gesture detection instruction; according to the gesture detection instruction, the user gesture above the display screen is detected and user gesture information is generated; according to the user gesture information, an interrupt signal is generated; the microprocessor issues a gesture detection instruction to the gesture recognition sensor; according to the interrupt signal , obtain user gesture information; identify the user gesture information, and output the identified user gesture information. The embodiment of the present application realizes the non-contact interaction of power monitoring through the gesture recognition sensor and the microprocessor; it solves the problem that the display area and the key interaction area of the monitoring unit of the existing communication power supply are small, and the user experience is poor; user experience.

Description

Human-machine interface board and its control method, monitoring unit and storage medium

technical field

The embodiments of the present application relate to the field of communication technologies, and in particular, to a human-machine interface board and a control method thereof, a monitoring unit for a communication power supply, and a storage medium.

Background technique

With the rapid development of information technologies such as the Internet, Internet of Things, and Industry 4.0, the rapid progress of modern society has been promoted. More and more industrial control, medical, communication, consumer and other electronic products are becoming more and more intelligent, and embedded systems with microprocessors as the core are increasingly widely used. The network can realize remote and intelligent services anytime, anywhere. The mobile communication system, one of the cornerstones supporting these information technologies, has also developed rapidly from 2G, 3G, and 4G to 5G in the past two decades. A very important feature of 4G and 5G networks is that base station equipment continues to increase, network coverage is increasingly dense, and users' requirements for network services are also increasing.

Communication power supply, as an essential part of mobile communication system, needs to provide energy to communication equipment in a safe, reliable, efficient, stable and uninterrupted manner, and has functions such as intelligent monitoring, unattended, automatic battery management, etc. the needs of the times. At the same time, the in-depth coverage of mobile communication networks has also put forward higher requirements for miniaturization and easy maintenance of communication power supplies: the power density of the rectifier is getting higher and higher, the volume is getting smaller and the weight is getting lighter; the entire power system is composed of, It has also developed from standard cabinets to embedded, wall-mounted, and pole-mounted integrated installations. For example, a DC power supply system with a capacity of 200A, the original structure may be a floor-standing cabinet of 1.6 meters, and now a standard 3U socket box is sufficient. The changes in these requirements have also promoted the rapid development of the monitoring unit of the communication power supply towards miniaturization and pre-maintenance.

Due to the characteristics of the communication power supply industry and user habits, the monitoring unit has always retained the function of LCD display and button interaction, which is convenient for project start-up and on-site maintenance. However, as the monitoring unit becomes smaller, this function becomes more and more difficult to realize. For example, the latest embedded power monitoring unit of a company adopts high-density design. The front panel with a small size of 84mm*40mm is densely arranged with RJ45 network port, USB (Universal Serial Bus, Universal Serial Bus) interface, 27mm*27mm LCD (Liquid Crystal Display, liquid crystal display) in the visual field, up/down/confirm/return 4 buttons, and fixed locks, etc. Due to the limited space height, the size of the four keys is as small as 3mm*3mm; the key spacing is also 3mm. It is conceivable that due to the small size, it is very easy to press multiple keys and press the wrong keys. The operation of combining keys (pressing multiple keys at the same time) is basically impossible, and the keys themselves are easily damaged; the sensitivity and reliability of interaction are very poor. The operating experience is very poor.

SUMMARY OF THE INVENTION

In view of this, the purpose of the embodiments of the present application is to provide a human-machine interface board and a control method thereof, a monitoring unit of a communication power supply, and a storage medium, so as to solve the problem that the existing monitoring unit of the communication power supply has a small display area and a small key interaction area. , the problem of poor user experience.

The technical solutions adopted by the embodiments of the present application to solve the above-mentioned technical problems are as follows:

According to an aspect of the embodiments of the present application, a human-machine interface board is provided, the human-machine interface board includes a display screen, a gesture recognition sensor, and a microprocessor;

The gesture recognition sensor is used to obtain the gesture detection instruction issued by the microprocessor; according to the gesture detection instruction, detect the user gesture above the display screen and generate user gesture information; according to the user gesture information, generate an interrupt signal;

The microprocessor is configured to issue a gesture detection instruction to the gesture recognition sensor; obtain the user gesture information according to the interrupt signal; recognize the user gesture information, and output the recognized user gesture information .

According to another aspect of the embodiments of the present application, there is provided a monitoring unit for a communication power supply, the monitoring unit for a communication power supply includes a main controller and the above-mentioned man-machine interface board;

The main controller is configured to acquire the recognized user gesture information output by the human-machine interface board, and return user gesture response information to the human-machine interface board.

According to another aspect of the embodiments of the present application, a method for controlling a human-machine interface board is provided, the method comprising:

A gesture detection instruction is issued to the gesture recognition sensor; the gesture recognition sensor obtains the issued gesture detection instruction; according to the gesture detection instruction, the user gesture above the display screen is detected and user gesture information is generated; according to the user gesture information, generate an interrupt signal;

obtaining the user gesture information according to the interrupt signal;

Identify the user gesture information, and output the identified user gesture information.

According to another aspect of the embodiments of the present application, a storage medium is provided, a control program of a human-machine interface board is stored on the storage medium, and the control program of the human-machine interface board is executed by a processor to realize the above-mentioned man-machine interface. The steps of the control method of the interface board.

The man-machine interface board and the control method thereof, the monitoring unit of the communication power supply, and the storage medium of the embodiment of the present application realize the non-contact interaction of power supply monitoring through the gesture recognition sensor and the microprocessor, and solve the monitoring of the existing communication power supply. The unit has the problem that the display area and the key interaction area are small, and the user experience is poor; the user experience is improved.

Description of drawings

1 is a schematic structural diagram of a human-machine interface board according to a first embodiment of the application;

FIG. 2 is a schematic flowchart of a control method for a human-machine interface board according to a second embodiment of the present application.

The realization, functional characteristics and advantages of the purpose of the present application will be further described with reference to the accompanying drawings in conjunction with the embodiments.

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clear and comprehensible, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application.

first embodiment

In order to better understand this embodiment, the gesture recognition and the improvement process of the existing human-machine interface board are described below:

The existing communication power system usually has the following units: AC power distribution, DC power distribution, battery pack, rectifier, and a monitoring unit as the core of the system. The monitoring unit is composed of a core main board, an HMI (Human Machine Interface, human-machine interface) board, a power conversion board, a signal acquisition board, and a network communication board. Among them, the core motherboard is generally the smallest application system of MCU (Micro Control Unit, Micro Control Unit)/ARM, which carries and runs the main business software of monitoring, and also includes GUI (Graphical User Interface, Graphical User Interface) window menu. The HMI board is relatively simple, mainly including hardware circuits such as LCD, input keyboard, and status indicator LED. Due to space constraints, there are few input keyboards, mostly four buttons of "up", "down", "confirm" and "return"; some monitoring units also have buttons such as "left" and "right". Through these buttons and the display interface presented by the LCD, human-computer interaction is realized. However, as the monitoring unit becomes increasingly miniaturized, the monitoring unit of the existing communication power system has the problem that the display area and the key interaction area are small, and the user experience is poor. Therefore, the monitoring unit is improved to realize non-contact interaction through gesture recognition.

First, choose the right gesture recognition technology and sensor solution.

Although gesture recognition technology has not yet been applied in the communication power industry, it is currently widely used in wearable devices and consumer electronics; there are also many solutions for reference. Gesture recognition technology can be roughly divided into three levels: two-dimensional hand recognition, two-dimensional gesture recognition, and three-dimensional gesture recognition.

Two-dimensional hand recognition, also known as static two-dimensional gesture recognition, recognizes several static gestures, such as making a fist or spreading five fingers. A typical application is a hand-controlled player: the user lifts the palm up in front of the camera, and the video starts to play; when the user puts the palm in front of the camera, the video pauses.

Two-dimensional gesture recognition, with dynamic features, can track the movement of gestures, and then recognize complex movements that combine gestures and hand movements. The scope of gesture recognition is really extended to the two-dimensional plane.

3D gesture recognition, compared with the first two, requires spatial depth information, 3D imaging technology on hardware, and more complex software recognition algorithm, which can recognize various hand shapes, gestures and actions, and is applied to playing games or VR (VirtualReality, virtual reality). reality).

According to the actual application scenarios and cost requirements of power monitoring, a relatively uncomplicated two-dimensional gesture recognition technology can be selected, and an infrared gesture recognition sensor is used as the main solution for implementation. In general, the gesture recognition sensor is internally integrated with an LED (Light Emitting Diode, light-emitting diode) emitting light source, and a photodiode that senses infrared energy reflected back in four directions, up, down, left, and right. At the same time, if you want to improve the friendliness of the power monitoring unit and automatically adjust the LCD backlight according to the ambient light intensity, the selected sensor also needs to have an independent photodiode that senses the ambient light intensity. In addition, the selected sensors have standard I2C communication and interrupt interfaces so that information can be acquired and processed in real time.

Secondly, the existing human-computer interaction board is optimized, and the gesture recognition function circuit is added.

Specifically, on the existing HMI board, a gesture recognition sensor, an MCU (MicroControl Unit, Micro Control Unit) that implements a gesture recognition algorithm, and peripheral devices are added. The MCU and the sensor are connected by I2C communication and external interrupt signal interface, and through UART (Universal Asynchronous Receiver/Transmitter) interface, SPI (Serial Peripheral Interface, serial peripheral interface), or I2C (Inter- Integrated Circuit, integrated circuit bus) and other interfaces) output the gesture recognition result to the core motherboard; at the same time, the MCU provides level output ports not less than the number of buttons, which can simulate the output level before and after the corresponding button action; the level output port and the button circuit are connected The input terminals of the buttons are connected to each other, and the jitter is eliminated, and then output to the core board to ensure the interface compatibility between boards; that is to say, the upgrade of the on-site monitoring unit can be completed by only replacing the HMI board and other hardware to support the realization of gestures interact.

Correspondingly, the front panel of the monitoring unit also needs targeted adjustment in structure. For example, above the sensor position, add a transmission window (transparent screen) made of plastic or glass recommended by the manufacturer, and a transmission window with dark coating is often used to achieve a beautiful effect; in addition to the diameter of the LED emission source and photodiode, increase the rubber isolation , reducing crosstalk through optical sealing for better results.

Based on the above improvement process, as shown in FIG. 1 , a first embodiment of the present application provides a human-machine interface board 10 . The human-machine interface board 10 includes a display screen 13 , a gesture recognition sensor 11 and a microprocessor 12 .

In this embodiment, the gesture recognition sensor 11 may be an infrared gesture recognition sensor;

The infrared gesture recognition sensor is internally integrated with an emitting light source, a first photodiode for sensing infrared energy reflected in different directions, and a second photodiode for sensing ambient light intensity.

In this embodiment, the gesture recognition sensor 11 and the microprocessor 12 are connected through an I2C (Inter-Integrated Circuit, integrated circuit bus) communication interface and an interrupt interface.

The gesture recognition sensor 11 is used to obtain the gesture detection instruction issued by the microprocessor 12; according to the gesture detection instruction, detect the user gesture above the display screen 13 and generate user gesture information; Gesture information, generate an interrupt signal;

The microprocessor 12 is configured to issue a gesture detection instruction to the gesture recognition sensor 11; obtain the user gesture information according to the interrupt signal; recognize the user gesture information, and output the identified user Gesture information.

In this embodiment, the microprocessor 12 can issue an instruction to the gesture recognition sensor 11 through the I2C protocol, drive the gesture recognition sensor 11 to perform short-range detection, gesture detection, and ambient light detection, and through the I2C communication interface and the interrupt interface, timely Read the detected data, judge, recognize and convert the detected data, so as to analyze and obtain various gestures such as approaching, flapping, and fast waving.

As an example, the recognition of different gestures is described below:

1. Proximity gesture recognition

First, set the upper limit, lower limit, and consecutive times (filtering parameters) of the short-range light intensity threshold, and allow the threshold to exceed the limit to generate an interruption.

After the microprocessor 12 issues the proximity detection instruction to the gesture recognition sensor 11 and generates an interrupt signal, the microprocessor 12 reads the proximity detection data. This data is the light intensity reflected by the object (eg hand) received by the second photodiode that senses the ambient light intensity. The magnitude of the light intensity value corresponds to the distance of the object: for example, if this value is lower than the lower limit, it means a “far away” motion gesture; if it is higher than the upper limit, it means a “closer” motion gesture.

Convert motion gestures to input actions for human-computer interaction. For example, the "close" gesture that lasts for a period of time (such as 1 second) is equivalent to the "confirm" button; the "away" gesture that lasts for a period of time is equivalent to the "return" button; the rapid alternating and repeated "close" and "away" buttons ", which is equivalent to "double-click".

Need to pay attention to the processing of duration. For example, a "close" gesture that lasts for a long period of time (such as 2 seconds) cannot be equivalent to pressing multiple "confirm" buttons continuously, and there must be a "away" action in the middle; "Stay away" (for example, more than 30 seconds), which means that the user or operator "leaves the field". In actual application scenarios, the front panel of the monitoring unit may be covered or blocked by objects (for example, the cabinet door where the embedded power supply is located is closed), which can also be equivalent to the operator "leaving".

2. Gesture detection and recognition

First set the gesture entry and exit thresholds, data storage FIFO (First in First out, first in first out) depth and other parameters, allowing gesture detection interruption.

After the microprocessor 12 issues a gesture detection instruction to the gesture recognition sensor 11 and generates an interrupt signal, the microprocessor 12 continuously reads data from the FIFO. These data are all reflected light intensity data received by the first photodiode (for example, four sets of direction sensing LEDs, which are used to sense the infrared energy reflected in different directions) during the entire movement process of the gesture. collection. By analyzing and positioning the light intensity data in the four directions of up, down, left, and right, the movement direction and distance of the gesture can be judged.

1) Recognition of waving gestures. According to the time change characteristics (time-light intensity curve graph) of the four groups of reflected light intensity data, the action of the gesture is judged. Obviously, when the hand is close to the sensing LED, the reflected light is strong; when the hand is far away from the sensing LED, the reflected light is weak. Therefore, it can be judged that the four groups of LED time-light intensity characteristic curves are similar to the normal distribution curve during the gesture waving process. When the hand is in the middle position, the reflected light is the strongest, and the light intensity decreases toward the edges of both sides. . For example, when waving your hand left and right, the time-light intensity characteristic curves of up and down sensing LEDs basically overlap; while the time-light intensity curves of left and right sensing LEDs have similar envelopes, but there is a time offset, that is, showing The translation characteristic in the direction of the time axis. Similarly, when waving up and down, the time-light intensity characteristic curves of the left and right sensing LEDs basically overlap; while the time-light intensity curves of the upper and lower sensing LEDs show a shift in the time axis, and the typical light intensity peak point shift time It is tens to hundreds of milliseconds, which is related to the swing speed.

2) Recognition of complex gestures. On the human-machine interface board, a plurality of infrared LEDs with relatively far distances can be added to facilitate the identification of complex gesture operations such as oblique waving, circle drawing, English letters, and numbers. The basic principle is similar to the up, down, left, and right gesture recognition algorithm. It is also determined by analyzing the time-light intensity curve of multi-point sensing LEDs and fitting the peak point trajectory of light intensity. For example, if the trajectory of the peak point of the light intensity is judged to be approximately circular, the gesture is recognized as the English letter "O", etc.; if the trajectory of the peak point of the light intensity is judged to be approximately a mountain shape, such as "Λ", then the gesture is recognized as the letter "O". The gesture is the English letter "A" and so on.

3. Ambient light intensity recognition

Set the upper limit, lower limit, and consecutive times (filter parameters) of the ambient light intensity threshold, allowing the threshold to exceed the limit to generate an interrupt.

After the microprocessor 12 issues an ambient light intensity detection instruction to the gesture recognition sensor 11 and generates an interrupt signal, the microprocessor 12 reads the data. This data is ambient light intensity data received by the second photodiode that senses the ambient light intensity.

Please refer to FIG. 1 again, in one embodiment, the human-machine interface board 10 further includes a button circuit 14, a logic processing circuit 15 and a jitter elimination circuit 16;

The microprocessor 12 includes level output ports (shown as P1, P2, P3, and P4 in the figure), and the key circuit 14 includes key input terminals (shown as K1, K2, K3, and K4 in the figure); The level output port and the key input end are connected to the input end of the logic processing circuit 15, and the output end of the logic processing circuit 15 is connected to the input end of the jitter elimination circuit 16;

The microprocessor 12 is further configured to output a corresponding level signal through the level output port according to the identified user gesture information;

The logic processing circuit 15 is configured to perform logic processing on the level signal output by the level output port and the signal at the key input end;

In this embodiment, the logic processing circuit 15 may be a logic AND processing circuit, and the logic AND processing circuit may include a plurality of logic AND processing units (shown as L1, L2, L3, and L4 in the figure), each logic AND processing unit The input end of the processing unit is connected to a level output port and a key input end, for example: the input end of the logic AND processing unit L1 is connected to the level output port P1 and the key input end K1.

The jitter elimination circuit 16 is configured to perform jitter elimination on the signal logically processed by the logic processing circuit 15, and output the jitter-eliminated signal.

In this embodiment, the jitter elimination circuit 16 may be a Schmitt circuit, such as a 74HC7001. Through the jitter elimination circuit 16, the jitter elimination of the key output on the man-machine interface board is performed, and the signal quality is improved; the monitoring unit can change the polling mode to the interrupt mode for the detection of each key input to improve the real-time response.

The human-machine interface board of the embodiment of the present application realizes the non-contact interaction of power monitoring through the gesture recognition sensor and the microprocessor; it solves the problem that the monitoring unit of the existing communication power supply has a small display area and key interaction area, and the user experience Bad problem; improved user experience.

Second Embodiment

As shown in FIG. 2 , a second embodiment of the present application provides a method for controlling a human-machine interface board. For the human-machine interface board, reference may be made to the first embodiment, which will not be repeated here. The method includes:

Step S21: issue a gesture detection instruction to the gesture recognition sensor; the gesture recognition sensor obtains the issued gesture detection instruction; according to the gesture detection instruction, detect the user gesture above the display screen and generate user gesture information; Gesture information, generate an interrupt signal.

In this embodiment, the generating an interrupt signal according to the user gesture information includes:

comparing the parameter value in the user gesture information with the upper or lower limit of the preset threshold;

When the parameter value in the user gesture information exceeds the upper limit or the lower limit of the preset threshold, an interrupt signal is generated.

Step S22: Acquire the user gesture information according to the interrupt signal.

Step S23: Identify the user gesture information, and output the identified user gesture information.

In an implementation manner, the identifying the user gesture information and outputting the identified user gesture information further includes:

Get user gesture response information.

The control method of the human-machine interface board of the embodiment of the present application realizes the non-contact interaction of power monitoring through the gesture recognition sensor and the microprocessor; it solves the problem that the display area and the button interaction area of the monitoring unit of the existing communication power supply are small. , the problem of poor user experience; improved user experience.

Third Embodiment

A third embodiment of the present application provides a storage medium, where a control method program of a human-machine interface board is stored on the storage medium, and the control method program of the human-machine interface board is used to implement the control method of the second embodiment when executed by a processor. The steps of the control method of the man-machine interface board.

It should be noted that the storage medium of this embodiment belongs to the same concept as the method of the second embodiment, and the specific implementation process is detailed in the method embodiment, and the technical features in the method embodiment are all applicable in this embodiment. I won't go into details here.

The storage medium of the embodiment of the present application realizes the non-contact interaction of power monitoring through the gesture recognition sensor and the microprocessor; it solves the problem that the monitoring unit of the existing communication power supply has a small display area and key interaction area, and the user experience is poor. Problem; improved user experience.

Fourth Embodiment

A fourth embodiment of the present application provides a monitoring unit for a communication power supply, where the monitoring unit for a communication power supply includes a main controller and the man-machine interface board described in the first embodiment;

The main controller is configured to acquire the recognized user gesture information output by the human-machine interface board, and return user gesture response information to the human-machine interface board.

In this embodiment, the human-machine interface board and the main controller communicate through a UART (Universal Asynchronous Receiver/Transmitter) interface, an SPI (Serial Peripheral Interface, serial peripheral interface), and an I2C interface. Either of the interfaces is connected.

In this embodiment, returning user gesture response information to the human-machine interface board includes but is not limited to the following situations:

1. When the user starts to operate (receives any information other than "departure"), the display backlight of the LCD display is automatically adjusted according to the intensity of the ambient light.

2. After the operator leaves the field, the backlight of the control LCD screen is turned off, and the menu in the user operation exits to the screen saver state. This situation is conducive to saving energy and improving the service life of the LCD.

3. If it supports the detection and recognition of complex gestures such as English letters and numbers, it can improve the window interface of interactive response, such as password input, parameter setting and other input editing menus, and realize faster and more convenient information input and action control.

In order to better illustrate this embodiment, the following description is given in conjunction with the transformation case of the monitoring unit:

A company has launched a new type of embedded communication power supply equipment, which is miniaturized and high-density design. The system capacity of 200A only requires a space of 3U high and 19 inches wide; it can be widely used in base stations, outdoor cabinets, wall hangings and other telecom power supply to the device. The equipment consists of an AC power distribution unit, a DC power distribution unit, 4 rectifiers, an environmental detection unit and a monitoring unit. Among them, the monitoring unit is designed for high density and front maintenance. The physical size is only 84mm(L)*40mm(W)*270mm(D), and the front panel space is less than 1U*2U. There are one USB port and one RJ45 Ethernet port. Ethernet port, an LCD with a visible area of 27mm*27mm, 4 buttons for "up", "down", "confirm", "return", 3 LED indicators for power, operation and alarm, and a fixed lock etc. device. Due to the extremely limited space on the front panel, the four buttons are very small, with a size of 3mm*3mm; the spacing between the buttons is only 3mm, and it is easy to press too many or wrongly; the operability of human-computer interaction is very poor. In order to improve the human-computer interaction experience, it is proposed to increase the gesture recognition function, realize a new user interface with simple and convenient operation gestures, and bring a new control experience to the power monitoring unit.

First, referring to Figure 1, the circuit of the human-computer interaction interface board is optimized. For gesture recognition sensors, you can choose APDS-9960 from AVAGO, which has been successfully used in Samsung Galaxy S5 and other products. Similar sensors include Si1153 from Silicon labs, E909 from Elmos, and TMG399x from AMS. APDS-9960 has the advantages of high integration and low cost.

The APDS-9960 optical sensor integrates functions such as Gesture Detection, Proximity Detection, Ambient Light Sensing (ALS, Ambient Light Sensing), and Color Sense (RGBC). Approximate 0.01lux illuminance and visual response of the human eye, highly flexible operation even behind dark glass; built-in UV and IR blocking filters, four separate diodes for sensitivity in different directions; an I2C compatible interface to Connect the microprocessor.

In terms of microprocessors, the STM32F030 with the Cortex-M0 core is selected. The chip integrates resources such as FLASH, RAM, GPIO, TIMER, I2C, and USART. The hardware cost of the overall solution is very low. In fact, any other low-cost microprocessor with similar resources would also be suitable. The STM32F030 and APDS-9960 are connected by I2C and interrupt interface; the 4 output ports of STM32F030 are ANDed with the key input respectively, and the jitter is eliminated by the Schmitt circuit (such as 74HC7001) and then output to the core processing board; the software recognizes that the upward After the gestures of waving, waving down, approaching, and moving away, the microprocessor software corresponds to the low-level pulse output of these four ports, and the pulse width is about 0.5 seconds, which is equivalent to simulating "up", "down", The output of "Confirm" and "Return" buttons can be fully guaranteed to be compatible with the original menu interface.

In software, STM32F030 is implemented based on C language. The basic function is to obtain from APDS-9960 through the I2C interface, and recognize various gestures such as approaching, flapping, and fast waving, convert them into corresponding button actions, and output low-level pulses to the corresponding four ports. The UART port sends gesture information to the core motherboard. Within the valid detection range, the following gestures are recognized:

1. Basic 2D gestures: up, down, left, and right four swipe gestures. After identification, drive P1, P2, P1&P3, P2&P3 ports respectively, and output low-level pulses with a pulse width of 0.5 seconds; equivalent to simulating "up", "down", "left (up + confirm)", "right" (Down + Confirm)" button output;

2. Basic proximity gestures: "approach" gestures that last up to 1 second, and "away" gestures that last up to 1 second. After identification, the P3 and P4 ports are respectively driven to output low-level pulses with a pulse width of 0.5 seconds; it is equivalent to simulating the output of the "confirm" and "return" buttons;

3. Combination gestures: fast multiple left and right hand gestures, up and down gestures, and fast alternate "close/"far away" gestures, respectively drive P1&P2&P3, P1&P2, P3&P4 ports, and output low-level pulses with a pulse width of 0.5 seconds; yes Simulates the output of buttons such as "rapid increase (up + down + confirm)", "rapid decrease (up + down)", "help (confirm + return)", etc. Of course, the functions of these combined buttons can be customized according to business needs. Defined as other meanings, such as "back to the main menu", "lock screen", etc.

In addition, the microprocessor outputs the detected ambient light intensity value (if necessary, also includes the simulated button information) to the core motherboard through the UART interface.

The software of the core motherboard receives the ambient light intensity value through the UART interface, and adjusts the backlight size of the LCD according to the value, providing a comfortable display effect for the operator. Through the UART port or the key detection input port, the virtual key information corresponding to the gesture recognition is obtained, and the interaction of the user interface is carried out. Obviously, the original physical keyboard has only four, which can only represent four kinds of information: up, down, confirm, and return; while gesture recognition can complete the effect of combining keys that is difficult to achieve physically, and at least output up, down, confirm, and return. There are 9 kinds of information, including return, left, right, help, fast increase, and fast decrease, which greatly improves the efficiency and friendliness of interaction.

The monitoring unit of the communication power supply of the embodiment of the present application realizes the non-contact interaction of power supply monitoring through the gesture recognition sensor and the microprocessor; The problem of poor experience; improved user experience.

Those of ordinary skill in the art can understand that all or some of the steps in the methods disclosed above, functional modules/units in the systems, and devices can be implemented as software, firmware, hardware, and appropriate combinations thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be composed of several physical components Components execute cooperatively. Some or all physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit . Such software may be distributed on computer-readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). As known to those of ordinary skill in the art, the term computer storage media includes both volatile and nonvolatile implemented in any method or technology for storage of information, such as computer readable instructions, data structures, program modules or other data flexible, removable and non-removable media. Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cartridges, magnetic tape, magnetic disk storage or other magnetic storage devices, or may Any other medium used to store desired information and which can be accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and can include any information delivery media, as is well known to those of ordinary skill in the art .

The preferred embodiments of the present application have been described above with reference to the accompanying drawings, which are not intended to limit the scope of the rights of the present application. Any modifications, equivalent substitutions and improvements made by those skilled in the art without departing from the scope and essence of the present application shall fall within the scope of the right of the present application.

Claims (10)

1. A man-machine interface board is characterized in that the man-machine interface board comprises a display screen, a gesture recognition sensor and a microprocessor;

the gesture recognition sensor is used for acquiring a gesture detection instruction issued by the microprocessor; detecting a user gesture above the display screen according to the gesture detection instruction and generating user gesture information; generating an interrupt signal according to the user gesture information;

the microprocessor is used for issuing a gesture detection instruction to the gesture recognition sensor; acquiring the user gesture information according to the interrupt signal; and identifying the user gesture information and outputting the identified user gesture information.

2. The human-machine interface board of claim 1, further comprising a keying circuit, a logic processing circuit and a jitter removal circuit;

the microprocessor comprises a level output port, and the key circuit comprises a key input end; the level output port and the key input end are connected to the input end of the logic processing circuit, and the output end of the logic processing circuit is connected to the input end of the jitter elimination circuit;

the microprocessor is also used for outputting a corresponding level signal through the level output port according to the recognized user gesture information;

the logic processing circuit is used for carrying out logic processing on the level signal output by the level output port and the signal of the key input end;

and the jitter elimination circuit is used for eliminating jitter of the signal logically processed by the logic processing circuit and outputting the signal after eliminating the jitter.

3. The human-machine interface board of claim 1, wherein the gesture recognition sensor is an infrared gesture recognition sensor;

the infrared gesture recognition sensor is internally integrated with a transmitting light source, a first photodiode for sensing infrared energy reflected in different directions and a second photodiode for sensing the light intensity of the environment.

4. The human-machine interface board of claim 1, wherein the gesture recognition sensor and the microprocessor are connected via an integrated circuit bus I2C communication interface and an interrupt interface.

5. A monitoring unit of a communication power supply, which is characterized by comprising a main controller and a man-machine interface board according to any one of claims 1 to 4;

and the main controller is used for acquiring the recognized user gesture information output by the human-computer interface board and returning user gesture response information to the human-computer interface board.

6. The monitoring unit of claim 5, wherein the human-machine interface board is connected to the main controller via any one of a UART interface, a SPI interface, and an I2C communication interface.

7. A method of controlling a human-machine interface board, the method comprising:

issuing a gesture detection instruction to a gesture recognition sensor; the gesture recognition sensor acquires a issued gesture detection instruction; detecting a user gesture above the display screen according to the gesture detection instruction and generating user gesture information; generating an interrupt signal according to the user gesture information;

acquiring the user gesture information according to the interrupt signal;

and identifying the user gesture information and outputting the identified user gesture information.

8. The method of claim 7, wherein generating an interrupt signal according to the user gesture information comprises:

comparing the parameter value in the user gesture information with the upper limit or the lower limit of a preset threshold;

and generating an interrupt signal under the condition that the parameter value in the user gesture information exceeds the upper limit or the lower limit of the preset threshold.

9. The method of claim 7, wherein recognizing the user gesture information and outputting the recognized user gesture information further comprises:

and acquiring user gesture response information.

10. A storage medium, characterized in that the storage medium stores thereon a control program of a human-machine interface board, the control program of the human-machine interface board realizing the steps of the control method of the human-machine interface board according to any one of claims 7 to 9 when executed by the processor.

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