Gas flowmeter display control device

Abstract

The application relates to the technical field of gas flowmeter equipment, in particular to a gas flowmeter display control device. The device comprises a core processor, a display component connected with the core processor, a pyroelectric infrared induction component and a millimeter wave radar component; the signal output end of the pyroelectric infrared induction component is connected with the first I / O pin of the core processor, and is used for sending an infrared trigger signal indicating human body movement to the core processor; the enable end of the millimeter wave radar component is connected with the second I / O pin of the core processor, and the data output end is connected with the communication interface of the core processor; the core processor is configured to control the power supply state of the millimeter wave radar component through the second I / O pin, and acquire human body distance data through the communication interface; and the backlight control end of the display component is connected with the third I / O pin of the core processor. The device can be on standby under extremely low static power consumption, can accurately identify the reading intention of a real user, and can be popularized in high-end gas flowmeter applications.

Description

Technical Field

[0001] This invention relates to the field of gas flow meter technology, and more specifically to a gas flow meter display and control device. Background Technology

[0002] In gas flow meters, especially in high-end applications such as industrial and commercial settings, extending battery life, reducing maintenance costs, and improving the human-machine interface are core technological requirements. Existing technologies often employ backlighting solutions that periodically illuminate using timers or are triggered by device buttons. These control methods cannot detect whether a user is actually present or has a genuine need to read the meter. While this has a relatively small impact in ordinary household gas flow meter applications, in high-end industrial and commercial scenarios, these simple and mechanical backlighting control methods significantly lack the ability to save power and optimize the human-machine interface, resulting in a serious disconnect from actual usage needs.

[0003] To address these issues, engineers have developed various backlighting solutions based on sound wave triggering, vibration triggering, or distance sensing triggering. However, these solutions only perform well in specific environmental scenarios or human behavior scenarios, failing to achieve a balance between reliability, low power consumption, and user experience in complex industrial or commercial environments. For example, sound-triggered solutions are prone to false triggering or failure due to ambient noise in noisy environments; vibration-triggered solutions are easily affected by the device's own vibrations or minor vibrations caused by passing vehicles, resulting in low reliability; while single distance sensing solutions (such as ultrasound) can detect proximity, they cannot effectively distinguish between humans and other moving objects (such as forklifts or goods), and require continuous operation to maintain real-time detection, leading to high power consumption, which is insufficient to meet the extreme energy requirements of battery-powered devices.

[0004] In summary, all of the above-mentioned automatic sensing backlight triggering schemes suffer from problems such as limited sensing dimensions and poor power consumption, making them difficult to promote in high-end gas flow meter applications. Utility Model Content

[0005] The purpose of this invention is to provide a gas flow meter display and control device that can standby with extremely low static power consumption and accurately identify the reading intent of the actual user. It can be promoted in high-end gas flow meter applications and has high practical value.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A gas flow meter display and control device includes a core processor and a display component connected to the core processor, and also includes a pyroelectric infrared sensing component and a millimeter-wave radar component.

[0008] The signal output terminal of the pyroelectric infrared sensing component is connected to the first I / O pin of the core processor and is used to send an infrared trigger signal indicating human movement to the core processor.

[0009] The enable pin of the millimeter-wave radar component is connected to the second I / O pin of the core processor, and its data output pin is connected to the communication interface of the core processor; the core processor is configured to control the power supply status of the millimeter-wave radar component through the second I / O pin and acquire human body distance data through the communication interface.

[0010] The backlight control terminal of the display component is connected to the third I / O pin of the core processor.

[0011] As a preferred embodiment of this invention, the display component includes a liquid crystal display screen and a liquid crystal driver chip, wherein the liquid crystal driver chip is connected to the core processor via an IIC interface.

[0012] As a preferred embodiment of this utility model, the gas flow meter display and control device further includes a communication component. The communication component is connected to the core processor via a UART interface for data interaction with a remote platform, uploading statistical data and receiving instructions from the platform.

[0013] As a preferred embodiment of this invention, the millimeter-wave radar component further includes a status detection pin, which is connected to the fourth I / O pin of the core processor and is used to directly output a human presence signal.

[0014] As a preferred embodiment of this invention, the pyroelectric infrared sensing component further includes a photoresistor, which is used to detect ambient light intensity and works in conjunction with the pyroelectric infrared sensing component.

[0015] As a preferred embodiment of this utility model, the gas flow meter display and control device further includes a power supply component, which is an energy storage battery used to provide multi-level power output to the core processor, display component, pyroelectric infrared sensing component and millimeter-wave radar component.

[0016] As a preferred embodiment of this invention, the backlight of the display component is an LED backlight, and the core processor controls the backlight brightness by outputting a PWM signal through the third I / O pin.

[0017] As a preferred embodiment of this invention, the gas flow meter display control device further includes a flashing reminder component, which is connected to the fifth I / O pin of the core processor and is used to generate light flashing to provide user perception feedback.

[0018] In summary, this utility model has the following beneficial effects:

[0019] In this invention, a pyroelectric infrared sensing component serves as the primary low-power wake-up mechanism, while a millimeter-wave radar component provides the secondary precise detection. The two work together to solve the problem of single-sensor solutions in existing technologies failing to balance power consumption and reliability. Compared to simple multi-sensor combinations in existing technologies, the pyroelectric infrared sensing component used in this invention can continuously monitor large-scale movement with extremely low power consumption. It effectively acquires human movement signals while avoiding the energy burden of continuous, all-time operation of millimeter-wave radar, significantly improving the device's self-sufficiency.

[0020] In this invention, after the pyroelectric infrared sensing component initially detects the movement of a living body, the core processor controls the activation of the high-power millimeter-wave radar component to perform secondary precise ranging and presence determination. Both determinations are based on the behavioral characteristic of human movement. The human-computer interaction logic is clear, reducing the effort required for operators during inspections or training, and accurately identifying the reading intentions of real users. It can be promoted in high-end gas flow meter applications and has high practical value. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a block diagram of the circuit structure of this device;

[0023] Figure 2 This is a circuit diagram of a pyroelectric infrared sensing component in one embodiment. Detailed Implementation

[0024] Preferred embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. Any person may implement the present disclosure in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0025] In conjunction with the above specific embodiments of this utility model, the implementation means of this utility model will be explained by way of example through a specific embodiment below.

[0026] In this embodiment, combined with Figure 1 As shown, the specific implementation method of the gas flow meter display control device is as follows:

[0027] First, the core processor can be implemented based on a low-power microcontroller, such as the FM33LG048 chip from Fudan Microelectronics.

[0028] The pyroelectric infrared sensing component includes a common pyroelectric infrared sensor (such as the RE200B) and its signal processing circuitry. This component continuously monitors changes in infrared radiation within its sensing range. When a living object (such as a human body) moves, the sensor generates a tiny electrical signal. This signal is amplified and compared by the internal chip, and then a high-level or low-level infrared trigger signal is output to a GPIO pin (defined as the first I / O pin) of the core processor. Figure 2 The circuit diagram of the pyroelectric infrared sensing component shown is shown. PIR CHECK1 is connected to the first I / O pin of the core processor.

[0029] In addition, the pyroelectric infrared sensing component in this embodiment also integrates a photoresistor for detecting ambient light intensity. This ensures that the device only outputs the infrared trigger signal to the core processor when the ambient light is below a certain threshold (such as in a room without additional lighting), thereby avoiding unnecessary triggering in well-lit environments where backlighting is not required, and further saving power consumption.

[0030] With the technological upgrade of millimeter-wave radar chips and the rapid decline in device costs, configuring millimeter-wave radar components on gas flow meters in high-end applications such as industrial and commercial applications has become crucial for improving equipment performance and human-machine interaction perception. Millimeter-wave radar components can be implemented based on low-power, small-size radar modules, such as the LD2410S from Hailink. This component supports UART communication and provides an output pin that can sense the presence / movement of a human body. Connecting a GPIO pin (defined as the second I / O pin) of the core processor (microcontroller) to the enable pin of the millimeter-wave radar component will, in the default standby state, output a low level, cutting off the core power supply of the millimeter-wave radar component and putting it in a completely off state with zero power consumption. When the pyroelectric infrared sensing component generates a valid trigger signal, the core processor is woken up or interrupted, and then outputs a high level through the second I / O pin to turn on the power of the millimeter-wave radar component. After the millimeter-wave radar component is turned on, the core processor communicates with it through its UART interface (such as UART1), sending configuration commands and reading data such as the detected human target distance and energy value.

[0031] In addition, the status detection pins (such as the OUT pin) provided by the millimeter-wave radar component can be directly connected to another GPIO pin of the core processor (defined as the fourth I / O pin). The level change of this pin can quickly indicate whether a human body is present, allowing the core processor to make a rapid judgment.

[0032] The display component includes a segment or dot-matrix LCD screen and its LCD driver chip. The LCD driver chip can be based on Shanghai Belling's BL55080. The core processor chip connects to the driver chip via an IIC interface, periodically or event-triggeredly updating the gas consumption, valve status (open / closed), abnormal alarm information, network signal strength, and other information displayed on the LCD screen. The positive terminal of the display's LED backlight is connected to the power supply through a MOSFET switching circuit. The gate of this MOSFET is controlled by another GPIO pin of the core processor (defined as the third I / O pin), which outputs a PWM signal. By changing the PWM duty cycle, the current flowing through the LED is precisely controlled, thereby achieving stepless adjustment of the backlight brightness. For example, a lower brightness is used in dim environments, and a higher brightness is automatically adjusted in bright environments or based on the user's distance.

[0033] The communication component is preferably a wireless communication module, such as the Quectel EC800E Cat.1 module. The core processor establishes a connection with the wireless communication module through another UART interface (such as UART2). The core processor is responsible for encapsulating information such as gas flow meter reading data, equipment status, and sensor events (such as someone reading the meter) into data packets, sending them to the wireless communication module via UART, and then the wireless communication module uploads them to the remote management platform via the mobile network. At the same time, the core processor also receives and executes query and control commands (such as remote valve closure) issued by the platform through this UART interface.

[0034] In this embodiment, the power supply component is an energy storage battery, which is used to provide multi-level power output for the core processor, display component, pyroelectric infrared sensing component and millimeter-wave radar component.

[0035] Energy storage batteries are typically connected to corresponding power management circuits, which convert and stabilize the battery voltage to different levels such as 3.3V and 5V to provide adaptive power to the aforementioned core processors, display components, and sensor modules.

[0036] In addition, the device includes a flashing alert component, which is connected to the fifth I / O pin of the core processor to generate a flashing light to alert the user that they have been identified.

[0037] The flashing alert component consists of one or more light-emitting diodes and their current-limiting resistors, and is driven directly by a single I / O pin of the core processor (such as the fifth I / O pin) or through a simple transistor / MOSFET switching circuit.

[0038] Its purpose is to provide a clear and unambiguous visual confirmation signal in complex and noisy industrial and commercial environments (such as boiler rooms, kitchens, and factory workshops), improve users' feedback perception, and further enhance human-computer interaction.

[0039] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Where there is no conflict, the embodiments and features in the embodiments of this application can be combined with each other. The structural materials, dimensions, shapes, etc., mentioned in the embodiments of this application are all illustrative descriptions and do not constitute strict or absolute limitations. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A gas flow meter display and control device, comprising a core processor and a display component connected to the core processor, characterized in that, It also includes pyroelectric infrared sensing components and millimeter-wave radar components; The signal output terminal of the pyroelectric infrared sensing component is connected to the first I / O pin of the core processor and is used to send an infrared trigger signal indicating human movement to the core processor. The enable pin of the millimeter-wave radar component is connected to the second I / O pin of the core processor, and its data output pin is connected to the communication interface of the core processor; the core processor is configured to control the power supply status of the millimeter-wave radar component through the second I / O pin and acquire human body distance data through the communication interface. The backlight control terminal of the display component is connected to the third I / O pin of the core processor.

2. The gas flow meter display and control device according to claim 1, characterized in that, The display component includes a liquid crystal display screen and a liquid crystal driver chip, and the liquid crystal driver chip is connected to the core processor through an IIC interface.

3. The gas flow meter display and control device according to claim 1, characterized in that, The gas flow meter display and control device also includes a communication component, which is connected to the core processor via a UART interface for data interaction with a remote platform, uploading statistical data and receiving instructions from the platform.

4. The gas flow meter display and control device according to claim 1, characterized in that, The millimeter-wave radar component also includes a status detection pin, which is connected to the fourth I / O pin of the core processor and is used to directly output a human presence signal.

5. A gas flow meter display and control device according to claim 1, characterized in that, The pyroelectric infrared sensing component also includes a photoresistor, which is used to detect ambient light intensity and works in conjunction with the pyroelectric infrared sensing component.

6. The gas flow meter display and control device according to claim 1, characterized in that, The gas flow meter display and control device also includes a power supply component, which is an energy storage battery; used to provide multi-level power output for the core processor, display component, pyroelectric infrared sensing component and millimeter-wave radar component.

7. A gas flow meter display and control device according to claim 2, characterized in that, The display component uses LED backlighting, and the core processor controls the backlight brightness by outputting a PWM signal through the third I / O pin.

8. A gas flow meter display and control device according to claim 4, characterized in that, The gas flow meter display control device also includes a flashing reminder component, which is connected to the fifth I / O pin of the core processor and is used to generate light flashing to provide user perception feedback.

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