CN219368837U - NB-IoT water meter with installation mode detection and anti-dismantling alarm - Google Patents

Abstract

The utility model discloses an NB-IoT water meter with installation mode detection and anti-disassembly alarm, which comprises a water meter base meter, an anti-disassembly detection unit and a circuit board fixed in a housing, wherein the circuit board comprises: the system comprises a microcontroller, an NB-IoT remote communication module, a local communication module, a storage module, an LCD liquid crystal screen display, a valve driving module, a sampling module and a power module; according to the utility model, the built-in angular position sensor is adopted, the installation mode of the water meter is intuitively reflected in real time through the liquid crystal screen, a prompt or warning effect is given to field installation personnel, and the metering accuracy of the operation of the water meter at the later stage is ensured. The angular position sensor and the pressure sensor can be matched for use to achieve the anti-dismantling detection function, and the abnormal information is reported to a system background, so that maintenance and measurement are facilitated. Furthermore, the pressure sensor can be used for monitoring the pressure in the pipeline in real time, so that the water pressure management is performed, the leakage loss is reduced, and the energy consumption is reduced.

Description

NB-IoT water meter with installation mode detection and anti-dismantling alarm

Technical Field

The utility model relates to the technical field of water meters, in particular to an NB-IoT water meter with an installation mode detection and anti-dismantling alarm.

Background

NB-IoT water meters are a legal meter for measuring water volumes and can transmit and control data. The accuracy of the metering is related to the benefits of both users and water supply enterprises. After the water meter is installed, the water meter is not standard to install (non-horizontal or vertical installation) and the risk of the water meter being detached, so that the problems of inaccurate metering, charging disputes and the like can be caused for users or water service companies.

At present, the mechanical water meter is divided into horizontal installation and vertical installation in the installation mode, and the specific installation mode is shown in dial marks. In the installation site, a part of the water meter is installed with the surface not horizontally upwards, but slightly inclined to the side which is convenient for reading. The inclination has larger error change at each flow point of the water meter, the larger the inclination angle is, the larger the error change is, even the error is out of tolerance, and even the user can privately disassemble the water meter.

For this purpose, an NB-IoT water meter with means of installation detection and tamper alarm is proposed.

Disclosure of Invention

Accordingly, embodiments of the present utility model seek to provide an NB-IoT water meter with means of installation detection and tamper alarm to solve or mitigate the technical problems of the prior art, at least providing a beneficial option;

the technical scheme of the embodiment of the utility model is realized as follows: an NB-IoT water meter with installation mode detection and anti-dismantling alarm comprises a base meter of the water meter and a circuit board installed in a base meter housing,

the anti-dismantling detection unit is connected with the control module of the circuit board;

the tamper detection unit comprises a first physical quantity sensing piece and a second physical quantity sensing piece;

the circuit board includes: the system comprises a microcontroller as a control module, and an NB-IoT remote communication module, a local communication module, a storage module, an LCD liquid crystal screen display, a valve driving and sampling module and a power module. The mounting mode and the anti-dismantling detection unit comprise:

the first physical quantity sensing piece is a pressure sensor, the second physical quantity sensing piece is an angle sensor, the pressure sensor is arranged in the water meter base meter and is electrically connected with the microcontroller, and the angle sensor is arranged on the circuit board and is electrically connected with the microcontroller.

Wherein the pressure sensor and the angular position sensor detect the pressure physical quantity and the angle physical quantity, and interact with the microcontroller through the form of sending electric signals

Optionally, the microcontroller is an ultra-low power consumption singlechip.

In the above embodiment, the following embodiments are described: the angular position sensor is a triaxial gyroscope, and the output information at least comprises a horizontal or vertical inclination angle. The pressure sensor outputs analog or digital signals which are selectable and are connected with an analog-digital conversion port of the singlechip.

In the above embodiment, the following embodiments are described: based on actual conditions, an amplifier for amplifying the electric signal, a filter for filtering noise in the electric signal and a sliding resistor for converting the electric signal of pressure and angle into a resistance value are sequentially connected between the pressure sensor and the angle sensor and between the pressure sensor and the microcontroller.

Optionally, the LCD screen is an LCD segment code LCD screen, and the display content of the LCD screen at least comprises a horizontal installation mode and an alarm indication.

In the above embodiment, the following embodiments are described: the local communication module is Bluetooth communication or near infrared communication or modulated far infrared communication. The microcontroller communicates the electrical signals wirelessly and locally through interaction between the NB-IoT communication module and the local communication module.

Compared with the prior art, the beneficial effects of this application are: according to the utility model, the built-in angular position sensor is adopted, the installation mode of the water meter is intuitively reflected in real time through the liquid crystal screen, a prompt or warning effect is given to field installation personnel, and the metering accuracy of the operation of the water meter at the later stage is ensured. The angular position sensor and the pressure sensor can be matched for use to achieve the anti-dismantling detection function, and the abnormal information is reported to a system background, so that maintenance and measurement are facilitated. Furthermore, the pressure sensor can be used for monitoring the pressure in the pipeline in real time, so that the water pressure management is performed, the leakage loss is reduced, and the energy consumption is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the technical descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of a basic structure of an NB-IoT water meter with installation mode detection and tamper alarm according to an embodiment of the present utility model;

FIG. 2 is a schematic view of the inclination angle of the water meter according to the embodiment of the present utility model;

fig. 3 is a schematic diagram of an LCD segment code LCD screen according to an embodiment of the present utility model.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. This utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below;

it should be noted that the terms "first," "second," "symmetric," "array," and the like are used merely for distinguishing between description and location descriptions, and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of features indicated. Thus, a feature defining "first," "symmetry," or the like, may explicitly or implicitly include one or more such feature; also, where certain features are not limited in number by words such as "two," "three," etc., it should be noted that the feature likewise pertains to the explicit or implicit inclusion of one or more feature quantities;

in the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature; meanwhile, all axial descriptions such as X-axis, Y-axis, Z-axis, one end of X-axis, the other end of Y-axis, or the other end of Z-axis are based on a cartesian coordinate system.

In the present utility model, unless explicitly specified and limited otherwise, terms such as "mounted," "connected," "secured," and the like are to be construed broadly; for example, the connection can be fixed connection, detachable connection or integrated molding; the connection may be mechanical, direct, welded, indirect via an intermediate medium, internal communication between two elements, or interaction between two elements. The specific meaning of the terms described above in the present utility model will be understood by those skilled in the art from the specification and drawings in combination with specific cases.

In the prior art, mechanical water meters are divided into horizontal and vertical installation in the installation mode, and specific installation modes are marked by dial plates. In the installation site, a part of the water meter is installed with the surface not horizontally upwards, but slightly inclined to the side which is convenient for reading. The inclination has larger error change at each flow point of the water meter, the larger the inclination angle is, the larger the error change is, even the error is out of tolerance, and even more, the situation that a user privately dismounts the water meter can occur; for this reason, referring to fig. 1-3, the present utility model provides a technical solution to solve the above technical problems: an NB-IoT water meter with installation detection and tamper alarm, comprising:

a base meter of the water meter and a circuit board arranged in a base meter housing,

the anti-dismantling detection unit is connected with the control module of the circuit board;

the tamper detection unit comprises a first physical quantity sensing piece and a second physical quantity sensing piece;

the circuit board includes: the system comprises a microcontroller as a control module, and an NB-IoT remote communication module, a local communication module, a storage module, an LCD liquid crystal screen display, a valve driving and sampling module and a power module. The mounting mode and the anti-dismantling detection unit comprise:

the first physical quantity sensing piece is a pressure sensor, the second physical quantity sensing piece is an angle sensor, the pressure sensor is arranged in the water meter base meter and is electrically connected with the microcontroller, and the angle sensor is arranged on the circuit board and is electrically connected with the microcontroller.

The installation mode of the device and the anti-dismantling detection unit comprise: the pressure sensor is arranged in the water meter base meter and is electrically connected with the microcontroller, and the angular position sensor is arranged on the circuit board and is electrically connected with the microcontroller.

In this aspect, the above-mentioned component is a main functional mechanism in the device provided in this embodiment; on the basis of the above mechanism, it is arranged in the upper housing of the base meter; specifically, the housing is used as a reference supporting structure of the whole device, provides a foundation for the device to cooperate with the external environment, and can be matched with external staff to carry out maintenance, adjustment, assembly of related parts and other conventional mechanical maintenance operations;

in the scheme, all electric elements of the whole device are powered by the interaction of the mains supply and the power supply module; specifically, the electric elements of the whole device are in conventional electrical connection with the commercial power output port through the relay, the transformer, the button panel and other devices, so that the energy supply requirements of all the electric elements of the device are met.

In some embodiments of the present application, please refer to fig. 2 in combination: the embodiment of the utility model provides a schematic diagram of the installation inclination angle of the water meter.

By using the microcontroller to detect the horizontal angle value output by the angular position sensor in real time, the installation mode of the water meter can be judged, and on-site constructors can be guided to calibrate the water meter installation level rapidly.

When the water meter is installed to incline to the left side by theta 1, the installation mode symbol on the liquid crystal screen can be displayed to rotate to the right side as shown in figures 3-11, when the water meter is installed to incline to the right side by theta 2, the installation mode symbol on the liquid crystal screen can be displayed to rotate to the left side as shown in figures 3-12, and when the water meter rotates to a horizontal angle, the rotation symbol on the liquid crystal screen disappears.

It should be noted that, in this specific embodiment, the interaction between the microcontroller and the pressure sensor and the angle sensor is a conventional technology; including the following embodiments:

s1, determining interface types of the pressure sensor and the angle sensor, such as analog signal output or digital signal output. In the case of analog signals, where it is desired to convert the signal to a digital signal, an analog-to-digital converter (ADC) may be used.

S2, output signals of the pressure sensor and the angle sensor are connected to an input port of the microcontroller. The microcontroller can obtain the data measured by the sensor by reading the signal of the input port.

And S3, processing the data of the sensor, such as calibration, filtering, calculation and the like, in the microcontroller according to the need.

S4, outputting the processed data to an LCD (liquid crystal display). LCD screens typically have an SPI or I2C interface through which data can be transmitted to the LCD screen for display.

S5, connecting control signals required by the LCD screen to an output port of the microcontroller. These control signals include data signals, clock signals, reset signals, etc. of the screen.

Wherein the pressure sensor and the angular position sensor detect the pressure physical quantity and the angle physical quantity, and interact with the microcontroller through the form of sending electric signals

Preferably, the microcontroller is an ultra-low power consumption singlechip.

In this scheme, the angular position sensor is a triaxial gyroscope, and the output information at least includes a horizontal or vertical inclination angle. The pressure sensor outputs analog or digital signals which are selectable and are connected with an analog-digital conversion port of the singlechip.

In the scheme, based on actual conditions, an amplifier for amplifying the electric signal, a filter for filtering noise in the electric signal and a sliding resistor for converting the electric signal of pressure and angle into a resistance value are sequentially connected between the pressure sensor and the angle sensor and the microcontroller.

Specific: the electrical signals of the pressure sensor and the angle sensor are amplified by an amplifier so that the microcontroller can receive and process. The specific magnification can be adjusted according to actual needs. A filter is added behind the amplifier to filter noise in the electric signal, so that the influence of noise on measurement accuracy is avoided. The type of filter can be selected according to actual needs. A sliding resistor is added behind the filter to convert the electrical signals of pressure and angle into corresponding resistance values. Here, a suitable sliding resistor needs to be selected according to the characteristics and actual requirements of the sensor. And finally, inputting the converted electric signals into a microcontroller for processing and judging. In the microcontroller, corresponding thresholds may be set, and when the pressure or angle exceeds the threshold, corresponding processing and prompting operations are triggered.

It should be noted that, in the scheme, based on the measurement accuracy consideration of the angular position sensor, when the constructor cannot intuitively determine that the horizontal angle is a specific value, the angular position sensor is horizontally calibrated when the water meter leaves the factory, preferably, the collected horizontal angular position variation is compared with a set angle threshold, the installation mode of the water meter is unreasonable only when the inclination angle of the water meter exceeds the angle threshold, and the rotation mode is prompted on the liquid crystal screen. If the water meter is not installed reasonably before the reporting period, the installation abnormality warning information is pushed to the cloud platform through NB-IoT wireless.

Specific:

the connection mode of the angular position sensor and the microcontroller is as follows: a digital signal interface (e.g., I2C, SPI, etc.) is used to connect the angular position sensor to the microcontroller to facilitate transmission of the angular data.

Horizontal calibration of the angular position sensor: and carrying out horizontal calibration when the water meter leaves the factory so as to obtain more accurate angle data.

Processing angular position sensor data: comparing the collected horizontal angle change with a set angle threshold value, and performing alarm processing only when the inclination angle of the water meter exceeds the angle threshold value.

Visualization of the liquid crystal screen: a digital signal interface (e.g., I2C, SPI, etc.) is used to connect the microcontroller to the LCD screen to facilitate visualization of the data.

NB-IoT wireless connectivity: and pushing the installation abnormality warning information to the cloud platform by using the NB-IoT module.

In some embodiments of the present application, please refer to fig. 1-3 in combination: the pressure sensor is arranged in the pipeline and is connected with the microcontroller on the circuit board through a lead, and the microprocessor detects the pressure change in the pipeline in real time. When the water meter is disassembled, the valve in front of or behind the meter is closed, and then the pressure value collected by the pressure sensor is changed. In general, the pressure change in the pipeline can be caused by water cut-off, and misjudgment can be carried out on the disassembly table. By combining the angular position sensor, the change amount of the angular position of the water meter in the moving process after the water meter is disassembled can rapidly reciprocate in a short time to exceed an angular threshold value, and the water meter can be judged whether to be disassembled or not when the simultaneous change amount of the pressure sensor and the angular position sensor exceeds the threshold value.

It can be appreciated that in this scheme: based on the actual implementation, the pressure sensor is mounted in a pipe and connected to a microcontroller on a circuit board by wires. An amplifier is added on the circuit board for amplifying the signal collected from the pressure sensor. A filter is added on the circuit board for removing noise in the signal. A sliding resistor is added on the circuit board to convert the electric signals collected from the pressure sensor and the angle sensor into resistance values so as to be processed by the microcontroller. An angle sensor is mounted and connected to the microcontroller on the circuit board by wires. Programming in a microcontroller, detecting signals acquired by the pressure sensor and the angle sensor in real time, and processing the signals. According to the logic described in the paragraph, when the valve before or after the meter is closed, the pressure value collected by the pressure sensor will change, and the microcontroller judges whether the water meter is detached or not through the collected signal. And by combining signals acquired by the angle sensor, the microcontroller can rapidly and reciprocally judge whether the water meter is disassembled in a short time, so that erroneous judgment is avoided. If the water meter is disassembled, the microcontroller can send alarm information to the cloud platform through the liquid crystal display or the wireless module so as to process in time.

In this scheme, under the normal condition in actual environment, the pressure that pressure sensor measured is 0Mpa after the water gauge was dismantled to the water gauge is dismantled the back and is moved the in-process and have the shake slope to take place, and microcontroller detects the water gauge and surpasses threshold value change fast many times in unit time, carries out AND operation with the pressure value that pressure sensor tested is 0Mpa and angular position sensor surpasses the threshold value fast many times, can judge that the water gauge is illegally dismantled. If either of the two conditions is not satisfied, the tamper judgment processing is not performed.

Specifically, the implementation of the above scheme includes the following steps:

s1, installing a pressure sensor and an angular position sensor on the water meter, and installing the pressure sensor and the angular position sensor on the water meter together or fixing the pressure sensor and the angular position sensor on the water meter by using an additional fixing device.

And S2, connecting output signals of the pressure sensor and the angular position sensor to an input port of the microcontroller. The microcontroller can obtain the data measured by the sensor by reading the signal of the input port.

S3, setting a threshold value for judging whether the water meter is illegally detached or not. The threshold value can be adjusted according to actual conditions so as to ensure the accuracy of detection.

S4, setting judgment logic for realizing illegal disassembly of the water meter through the microcontroller. In particular, one cycle may be used to continuously read the sensor data and compare it to a threshold. If the water meter is moved or tilted, the data output by the pressure sensor and the angular position sensor can be changed rapidly, and the microcontroller can detect the changes and judge whether the water meter is detached illegally.

S5, if the microcontroller detects that the water meter is illegally disassembled, an alarm signal can be triggered, for example, warning is carried out in a sound, illumination mode and the like. And meanwhile, the time and the position of the illegally detached water meter can be recorded for subsequent treatment.

In the scheme, the local communication module is Bluetooth communication or near infrared communication or modulated far infrared communication. Bluetooth communication is a communication transmission mode commonly used for mobile terminals, and can be operated by using a mobile phone. The near infrared is contact infrared, and has the characteristics of high transmission speed, low material cost and the like. The modulated far infrared is a near-distance point-to-point wireless communication, and has stronger anti-interference than near infrared. In the application, a water meter manufacturer or a water department can carry out factory inspection through a local communication module, and parameters on site are read and set.

It can be appreciated that in this embodiment, the LCD segment code LCD screen has the characteristic of low power consumption, so that the service life of the battery of the water meter can be ensured, and the water consumption and other information can be displayed. The circuit board is also provided with a storage module which can store historical data, various event records and the like. The valve driving can realize cost control, and can be matched with some alarms to perform valve closing control.

Specifically, the LCD segment code liquid crystal screen is connected: the microcontroller is connected to the LCD screen via GPIO pins, and a standard 8-bit or 4-bit parallel interface or serial interface such as SPI or I2C may be used. In the code, the LCD is controlled to display desired information by transmitting specific instructions and data to the LCD. And (3) connecting a storage module: the history data and event records are stored therein using a memory module such as EEPROM, SD card or Flash. The memory module is connected with the microcontroller through SPI, I2C or UART interfaces. In code, data can be read and written using a corresponding library of memory modules. And (3) connecting valve drive: solenoid valves or other actuators are used to control the valves of the meter. The valve driver is connected with the microcontroller through the GPIO pin so as to control the switch of the valve. In the code, the on-off control of the valve is realized by setting the corresponding GPIO pin state. Meanwhile, the cost control function, the alarm control and the like can be realized.

The technical features of the above-described embodiments may be combined in any manner, and for brevity, all of the possible combinations of the technical features of the above-described embodiments may not be described, however, they should be considered as the scope of the present description as long as there is no contradiction between the combinations of the technical features.

Examples

In order to make the above-described embodiments of the present utility model more comprehensible, embodiments accompanied with the present utility model are described in detail by way of example. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, so that the utility model is not limited to the embodiments disclosed below.

The present embodiment is based on the relevant principles described in the above detailed description, where exemplary applications are:

s1, measuring the pressure of 0Mpa by a pressure sensor after the water meter is disassembled, and shaking and tilting occur in the moving process after the water meter is disassembled;

s2, detecting the change of the water meter exceeding the threshold value rapidly for a plurality of times in unit time by the microcontroller, and performing AND operation on the pressure value tested by the pressure sensor of 0Mpa and the angular position sensor exceeding the threshold value rapidly for a plurality of times;

and S3, judging whether the water meter is illegally detached. If either of the two conditions is not satisfied, the tamper judgment processing is not performed.

The above examples merely illustrate embodiments of the utility model that are specific and detailed for the relevant practical applications, but are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (9)

1. The utility model provides a NB-IoT water gauge with mounting means detects and prevents tearing open warning, includes the base table and installs in the circuit board in the base table housing, its characterized in that: the circuit board is provided with a tamper-proof detection unit for detecting the compression and the relative angle of the base meter;

the anti-disassembly detection unit is connected with the control module of the circuit board.

2. The NB-IoT water meter with installation detection and tamper alarm of claim 1, wherein: the control module comprises a microcontroller;

the anti-disassembly detection unit comprises a first physical quantity sensing piece and a second physical quantity sensing piece which are respectively connected with the microcontroller;

the first physical quantity sensing piece and the second physical quantity sensing piece detect the pressure physical quantity and the angle physical quantity based on the base table, and interact with the microcontroller through a form of sending an electric signal.

3. The NB-IoT water meter with installation detection and tamper alarm of claim 2, wherein: the first physical quantity sensing element includes a pressure sensor, and the second physical quantity sensing element includes an angle sensor.

4. The NB-IoT water meter with installation detection and tamper alarm of claim 3, wherein: and an amplifier for amplifying the electric signal, a filter for filtering noise in the electric signal and a sliding resistor for converting the electric signal of pressure and angle into a resistance value are sequentially connected between the pressure sensor and the angle sensor and between the pressure sensor and the microcontroller.

5. The NB-IoT water meter with installation detection and tamper alarm of any of claims 2-4, wherein: the microcontroller of the circuit board is also connected with a storage module, a valve driving module, a sampling module and a power module.

6. The NB-IoT water meter with installation detection and tamper alarm of claim 5, wherein: the microcontroller of the circuit board is also connected with an interactive communication module and a local communication module;

the microcontroller transmits the electric signal to the background through the communication module.

7. The NB-IoT water meter with installation detection and tamper alarm of claim 6, wherein: the communication module includes an NB-IoT communication module.

8. The NB-IoT water meter with installation detection and tamper alarm of claim 7, wherein: the microcontroller communicates the electrical signals wirelessly and locally through interaction between the NB-IoT communication module and the local communication module.

9. The NB-IoT water meter with installation detection and tamper alarm of claim 7, wherein: the microcontroller of the circuit board is also connected with an LCD liquid crystal screen display module for visualization.