Intelligent electromagnetic water meter with pipe network noise monitoring function

Abstract

The present disclosure provides a kind of intelligent electromagnetic water meter with pipe network noise monitoring function, comprising: metering module, noise signal acquisition module, signal conditioning module, channel switching module and control module.The present disclosure provides a kind of intelligent electromagnetic water meter with pipe network noise monitoring function, flow metering and noise acquisition are integrated together, cost is lower, installation is more convenient, even in the case of pipe network scale is larger also can reasonably control cost;Control module can receive metering data and noise data, data diversification, reduce false alarm rate, for the judgment of pipeline leak point is more accurate, improve the accuracy and reliability of electromagnetic water meter;Through the step-by-step amplification of input signal, meet the gain requirement while reducing noise;Realize the switching of different power consumption working modes, meet the demand of signal processing for different working conditions, avoid energy waste, prolong the endurance time, improve the reliability of electromagnetic water meter, reduce operation and maintenance cost.

Description

Technical Field

[0001] This disclosure relates to the field of intelligent monitoring technology for urban water supply, and in particular to an intelligent electromagnetic water meter with pipeline noise monitoring function. Background Technology

[0002] With the acceleration of urbanization in my country, the scale of water supply networks continues to expand, and pipeline condition monitoring is crucial in the operation of water supply networks.

[0003] Currently, common pipeline condition monitoring methods include: manual monitoring, which relies on people listening for leaks above the pipeline using traditional listening rods or mechanical stethoscopes. This method is inefficient, subjective, and poorly adaptable to buried pipelines or noisy environments; deploying independent noise recorders or leak detection equipment. However, existing noise recorders or leak detection equipment are generally expensive in large-scale pipeline networks, and maintenance costs are also higher. Furthermore, the data from noise recorders or leak detection equipment is separated from flow data, making deployment more difficult; existing noise recorders can only collect vibration signals and cannot achieve high-precision monitoring, resulting in poor monitoring performance, low cost-effectiveness, and more complex and costly maintenance. Utility Model Content

[0004] This disclosure addresses the aforementioned problems by proposing an intelligent electromagnetic water meter with pipeline noise monitoring function.

[0005] To solve at least one of the above-mentioned technical problems, this disclosure proposes the following technical solution: A smart electromagnetic water meter with pipeline noise monitoring function is provided, including: The system comprises a metering module, a noise signal acquisition module, a signal conditioning module, a channel switching module, and a control module. The signal output terminal of the metering module is electrically connected to the signal input terminal of the control module. The metering module is used to acquire flow information within the pipeline network. The signal input terminal of the noise signal acquisition module is electrically connected to the signal input terminal of the signal conditioning module. The noise signal acquisition module is used to acquire vibration signals within the pipeline network and convert them into electrical signals. The signal conditioning module is used to amplify and condition the electrical signals. The signal conditioning module is electrically connected to the control module through the channel switching module. The channel switching module includes a switching unit. The input terminal of the switching unit is electrically connected to the output terminal of the signal conditioning module. The first output terminal of the switching unit is electrically connected to the control module. The second output terminal of the switching unit is electrically connected to the control module through an ADC module. The signal input terminal of the switching unit is electrically connected to the signal output terminal of the control module. The switching unit switches between the first and second output terminals according to the instructions of the control module.

[0006] In some implementations, the signal conditioning module includes a first-stage amplifier circuit, a second-stage amplifier circuit, and a third-stage amplifier circuit connected in series. The input terminal of the first-stage amplifier circuit is set as the signal input terminal of the signal conditioning module, and the output terminal of the third-stage amplifier circuit is set as the signal output terminal of the signal conditioning module. The first-stage amplifier circuit, the second-stage amplifier circuit, and the third-stage amplifier circuit are used to achieve different gains.

[0007] In some implementations, the first-stage amplifier circuit includes a first operational amplifier, the inverting input of which is connected to the signal output of the noise signal acquisition module, the non-inverting input of which is grounded through a first grounding resistor, and a first feedback resistor between the inverting input and the output of which is also provided. The second-stage amplifier circuit includes a second operational amplifier, the non-inverting input of which is connected to the output of which is also connected, and the inverting input and output of which are also connected. The third-stage amplifier circuit includes a third operational amplifier, the non-inverting input of which is connected to the output of which is also connected, the inverting input of which is grounded through a third grounding resistor, and the output of which is connected to the input of the channel switching module.

[0008] In some implementations, the metering module is a ceramic capacitive pressure sensor.

[0009] In some implementations, the noise signal acquisition module is a piezoelectric ceramic sensor.

[0010] In some implementations, the switching unit is a single-pole double-throw analog switch chip. The normally closed terminal of the switching unit is electrically connected to the control module, the normally open terminal of the switching unit is electrically connected to the control module through the ADC module, and the logic control signal input terminal of the switching unit is electrically connected to the control module.

[0011] In some implementations, the control module can determine whether there is a leak in the pipeline based on the flow and pressure data collected by the metering module and the vibration signal collected by the noise signal acquisition module. When the judgment result of the control module triggers a preset condition, the control module can issue a command to the channel switching module to switch between the first output terminal and the second output terminal.

[0012] In some implementations, a communication module is also included, which is electrically connected to the control module.

[0013] In some implementations, the control module communicates with the external storage and computing module via a communication module.

[0014] In some embodiments, a power supply module is also included, which is electrically connected to the power input terminals of the metering module, the noise signal acquisition module, the signal conditioning module, and the control module, respectively.

[0015] The beneficial effects of this disclosure are as follows: by setting up a metering module and a noise signal acquisition module, flow metering and noise acquisition are integrated together. Compared with the traditional separate deployment scheme, this method is more cost-effective and easier to install, and can reasonably control costs even in the case of large-scale pipeline networks. The control module can receive metering data and noise data, providing more diverse data, reducing false alarm rates, and making the identification of pipeline leaks more accurate, thereby improving the accuracy and reliability of the electromagnetic water meter. The signal conditioning module amplifies the input signal step by step, meeting gain requirements while reducing noise. The channel switching module enables switching between different power consumption operating modes to meet the signal processing needs of different operating conditions, avoiding energy waste, extending battery life, improving the reliability of the electromagnetic water meter, and reducing operation and maintenance costs.

[0016] In addition, unless otherwise specified, all technical solutions disclosed herein can be implemented using conventional methods in the field. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the specific embodiments of this disclosure or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of an intelligent electromagnetic water meter with pipeline noise monitoring function, provided as an embodiment of the present disclosure.

[0019] Figure 2 The present disclosure provides a circuit diagram of a signal conditioning module in an intelligent electromagnetic water meter with pipeline noise monitoring function, according to one embodiment.

[0020] Figure 3 The present disclosure provides a circuit diagram of a channel switching module in an intelligent electromagnetic water meter with pipeline noise monitoring function, according to one embodiment.

[0021] Figure 4 The present disclosure provides a circuit diagram of an ADC module in an intelligent electromagnetic water meter with pipeline noise monitoring function, according to one embodiment. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this disclosure clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only some, not all, of the embodiments of this disclosure, and are used merely to explain this disclosure and are not intended to limit it. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without inventive effort are within the scope of protection of this disclosure.

[0023] It should be noted that the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or server that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0024] Example: Reference manual attached Figure 1-4 This application illustrates an embodiment of a smart electromagnetic water meter with pipeline noise monitoring function, comprising: The module consists of a metering module 1, a noise signal acquisition module 2, a signal conditioning module 3, a channel switching module 4, and a control module 5.

[0025] The signal output terminal of metering module 1 is electrically connected to the signal input terminal of control module 5. Metering module 1 is used to collect flow information within the pipeline network. A ceramic capacitive pressure sensor can be selected for the metering module, which can simultaneously meet the flow and pressure detection requirements of the pipeline system.

[0026] The signal input terminal of the noise signal acquisition module 2 is electrically connected to the signal input terminal of the signal conditioning module 3. The noise signal acquisition module 2 is used to acquire vibration signals within the pipe network and convert them into electrical signals. The noise signal acquisition module 2 can employ a piezoelectric ceramic sensor. The probe of the piezoelectric ceramic sensor can be installed inside the electromagnetic water meter or directly on the electromagnetic water meter body. Through mechanical coupling between the electromagnetic water meter body and the pipe, it acquires vibration signals generated by abnormal conditions such as water leakage or water hammer effect in the pipe wall and converts them into electrical signals.

[0027] The signal conditioning module 3 is used to amplify and condition the electrical signal output by the noise signal acquisition module 2.

[0028] The signal input terminal of the signal conditioning module 3 is electrically connected to the output terminal of the noise signal acquisition module 2, and the signal output terminal of the signal conditioning module 3 is electrically connected to the control module 5 through the channel switching module 4.

[0029] The signal conditioning module 3 may include a first-stage amplifier circuit, a second-stage amplifier circuit, and a third-stage amplifier circuit connected in series. The input terminal of the first-stage amplifier circuit is set as the signal input terminal of the signal conditioning module 3, and the output terminal of the third-stage amplifier circuit is set as the signal output terminal of the signal conditioning module 3. The first-stage, second-stage, and third-stage amplifier circuits are used to achieve different gains. Through the three-stage series amplifier circuit, noise is effectively reduced while achieving signal amplification, and the optimal input range of the ADC module can be met.

[0030] The first-stage amplifier circuit includes a first operational amplifier U1. The inverting input terminal of the first operational amplifier U1 is connected to the signal output terminal of the noise signal acquisition module 2. The non-inverting input terminal of the first operational amplifier is grounded through a first grounding resistor R6. A first feedback resistor R1 is provided between the inverting input terminal and the output terminal of the first operational amplifier U1.

[0031] The two-stage amplifier circuit includes a second operational amplifier U2. The non-inverting input of the second operational amplifier U2 is connected to the output of the first operational amplifier U1, and the inverting input of the second operational amplifier U2 is connected to the output of the second operational amplifier U2.

[0032] The three-stage amplifier circuit includes a third operational amplifier U3. The non-inverting input of the third operational amplifier U3 is connected to the output of the second operational amplifier U2. The inverting input of the third operational amplifier U3 is grounded through the third grounding resistor R7. The output of the third operational amplifier U3 is connected to the input of the channel switching module 4.

[0033] In this embodiment, the gain of the second-stage amplifier circuit is set to 1, thereby enabling the second-stage amplifier circuit to perform signal isolation and buffering functions. The product of the gain of the first-stage amplifier circuit and the gain of the third-stage amplifier circuit is the total gain of the signal conditioning module.

[0034] The first operational amplifier U1, the second operational amplifier U2, and the third operational amplifier U3 can all be CBM8628 operational amplifiers. This enables low-noise amplification and conditioning of the signal from the noise signal acquisition module 2.

[0035] The signal conditioning module 3 is electrically connected to the control module 5 through the channel switching module 4. The channel switching module 4 includes a switching unit 41. The input terminal of the switching unit 41 is electrically connected to the output terminal of the signal conditioning module 3. The first output terminal of the switching unit 41 is electrically connected to the control module 5. The second output terminal of the switching unit 41 is electrically connected to the control module 5 through the ADC module 42. The signal input terminal of the switching unit 41 is electrically connected to the signal output terminal of the control module 5. The switching unit 41 switches between the first output terminal and the second output terminal according to the instructions of the control module 5.

[0036] The control module 5 can determine whether there is a leak in the pipeline based on the flow and pressure data collected by the metering module 1 and the vibration signal collected by the noise signal acquisition module 2. The control module 5 can also calculate the effective value of the signal based on the collected vibration signal. When the calculation result of the control module 5 triggers the preset condition, the control module 5 can send a command to the channel switching module 4 to switch between the first output terminal and the second output terminal.

[0037] In an optional embodiment, the switching unit 41 can be a single-pole double-throw analog switch chip U4, specifically the MSUSB30 model. The normally closed terminal of the switching unit 41 is electrically connected to the input pin of the built-in ADC of the control module 5 for continuous noise signal acquisition and signal processing under normal conditions. The normally open terminal of the switching unit 41 is electrically connected to the control module 5 via the ADC module 42 for noise signal acquisition and signal processing when preset conditions are triggered. The logic control signal input terminal of the switching unit 41 is electrically connected to the control module 5. The common input terminal of the switching unit 41 is connected to the output terminal of the signal conditioning module 3. The power input terminal of the switching unit 41 can be electrically connected to the control module 5, allowing the control module 5 to provide power to the switching unit 41.

[0038] When the output of signal conditioning module 3 is directly connected to the input pin of the built-in ADC of control module 5, ADC module 42 can be completely powered down, saving a significant amount of power. Control module 5 can sample its built-in ADC at a lower sampling rate to calculate the effective value of the signal, which serves as the basis for trigger judgment. Although the accuracy of the built-in ADC of control module 5 is relatively low, the reliability of the trigger preset conditions can be guaranteed because the signal conditioning module 3 has already conditioned the signal.

[0039] When the effective value of the signal calculated by control module 5 exceeds the preset sensitivity threshold, control module 5 determines that an anomaly exists. Control module 5 sends a command to switching unit 41, and switching unit 41 switches to the normally open position. At this time, the output of signal conditioning module 3 is electrically connected to control module 5 through ADC module 42. ADC module 42 can be an AD7124-4 ADC chip U6. Control module 5 can control ADC module 42 to perform data acquisition at a maximum resolution of 24 bits.

[0040] Therefore, electromagnetic water meters can achieve low-power monitoring and high-precision diagnosis while ensuring signal quality.

[0041] In an optional embodiment, the control module 5 can be a chip of model FM33LG048. The control module 5 can use a Fourier transform algorithm to perform time-domain (signal RMS value) and frequency-domain (signal spectral characteristics) analysis on the vibration signal, extracting feature values ​​related to the pipeline's health condition, and thus diagnosing pipeline anomalies. Other existing calculation methods can also be used to perform time-domain and frequency-domain analysis on the vibration signal, and are not limited to the Fourier transform algorithm.

[0042] The control module 5 can also cross-validate the extracted pipeline health status-related feature values ​​with flow data to improve the accuracy of pipeline anomaly diagnosis. For example, if high-intensity noise in a specific frequency band is continuously detected in a no-flow state, the flow data can corroborate that an anomaly has indeed occurred in the pipeline.

[0043] In an optional embodiment, the electromagnetic water meter further includes a communication module 6, which is electrically connected to the control module 5. The control module 5 can communicate with an external storage and computing module 7 via the communication module 6. The external storage and computing module 7 can acquire and store the data and diagnostic results sent by the control module 5, or perform other calculations.

[0044] In an optional embodiment, the electromagnetic water meter further includes a power supply module, which is electrically connected to the power input terminals of the metering module 1, the noise signal acquisition module 2, the signal conditioning module 3, the channel switching module 4, and the control module 5, respectively. The power supply module may include a 3.6V lithium battery. Thus, the metering module 1, the noise signal acquisition module 2, the signal conditioning module 3, the channel switching module 4, and the control module 5 can be powered uniformly by the power supply module.

[0045] The beneficial effects of this disclosure are as follows: by setting up a metering module and a noise signal acquisition module, flow metering and noise acquisition are integrated together. Compared with the traditional separate deployment scheme, this method is more cost-effective and easier to install, and can reasonably control costs even in the case of large-scale pipeline networks. The control module can receive metering data and noise data, providing more diverse data, reducing false alarm rates, and making the identification of pipeline leaks more accurate, thereby improving the accuracy and reliability of the electromagnetic water meter. The signal conditioning module amplifies the input signal step by step, meeting gain requirements while reducing noise. The channel switching module enables switching between different power consumption operating modes to meet the signal processing needs of different operating conditions, avoiding energy waste, extending battery life, improving the reliability of the electromagnetic water meter, and reducing operation and maintenance costs.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure, and are not intended to limit them. Although this disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this disclosure.

Claims

1. A smart electromagnetic water meter with pipeline noise monitoring function, characterized in that, include: The module consists of a metering module (1), a noise signal acquisition module (2), a signal conditioning module (3), a channel switching module (4), and a control module (5). The signal output terminal of the metering module (1) is electrically connected to the signal input terminal of the control module (5). The metering module (1) is used to collect flow information within the pipeline network. The signal input terminal of the noise signal acquisition module (2) is electrically connected to the signal input terminal of the signal conditioning module (3). The noise signal acquisition module (2) is used to acquire vibration signals in the pipeline network and convert them into electrical signals. The signal conditioning module (3) is used to amplify and condition the electrical signals. The signal conditioning module (3) is electrically connected to the channel switching module (4) and the control module (5). The channel switching module (4) includes a switching unit (41). The input terminal of the switching unit (41) is electrically connected to the output terminal of the signal conditioning module (3). The first output terminal of the switching unit (41) is electrically connected to the control module (5). The second output terminal of the switching unit (41) is electrically connected to the control module (5) through the ADC module (42). The signal input terminal of the switching unit (41) is electrically connected to the signal output terminal of the control module (5). The switching unit (41) switches between the first output terminal and the second output terminal according to the instruction of the control module (5).

2. The intelligent electromagnetic water meter with pipeline noise monitoring function according to claim 1, characterized in that, The signal conditioning module (3) includes a first-stage amplifier circuit, a second-stage amplifier circuit, and a third-stage amplifier circuit connected in series. The input terminal of the first-stage amplifier circuit is set as the signal input terminal of the signal conditioning module (3), and the output terminal of the third-stage amplifier circuit is set as the signal output terminal of the signal conditioning module (3). The first-stage amplifier circuit, the second-stage amplifier circuit, and the third-stage amplifier circuit are used to achieve different gains.

3. The intelligent electromagnetic water meter with pipeline noise monitoring function according to claim 2, characterized in that, The first-stage amplifier circuit includes a first operational amplifier. The inverting input terminal of the first operational amplifier is connected to the signal output terminal of the noise signal acquisition module (2). The non-inverting input terminal of the first operational amplifier is grounded through a first grounding resistor. A first feedback resistor is provided between the inverting input terminal and the output terminal of the first operational amplifier. The secondary amplifier circuit includes a second operational amplifier, the non-inverting input terminal of the second operational amplifier is connected to the output terminal of the first operational amplifier, and the inverting input terminal of the second operational amplifier is connected to the output terminal of the second operational amplifier. The three-stage amplifier circuit includes a third operational amplifier. The non-inverting input of the third operational amplifier is connected to the output of the second operational amplifier. The inverting input of the third operational amplifier is grounded through a third grounding resistor. The output of the third operational amplifier is connected to the input of the channel switching module (4).

4. The intelligent electromagnetic water meter with pipeline noise monitoring function according to claim 1, characterized in that, The metering module (1) is a ceramic capacitive pressure sensor.

5. A smart electromagnetic water meter with pipeline noise monitoring function according to claim 1, characterized in that, The noise signal acquisition module (2) is a piezoelectric ceramic sensor.

6. The intelligent electromagnetic water meter with pipeline noise monitoring function according to claim 1, characterized in that, The switching unit (41) is a single-pole double-throw analog switch chip. The normally closed terminal of the switching unit (41) is electrically connected to the control module (5). The normally open terminal of the switching unit (41) is electrically connected to the control module (5) through the ADC module (42). The logic control signal input terminal of the switching unit (41) is electrically connected to the control module (5).

7. A smart electromagnetic water meter with pipeline noise monitoring function according to claim 1, characterized in that, The control module (5) can acquire the flow and pressure data collected by the metering module (1) and the vibration signal collected by the noise signal acquisition module (2). The control module (5) can determine whether there is a leak in the pipeline based on flow and pressure data and vibration signals. When the judgment result of the control module (5) triggers the preset condition, the control module (5) can send an instruction to the channel switching module (4) to switch between the first output terminal and the second output terminal.

8. A smart electromagnetic water meter with pipeline noise monitoring function according to claim 1, characterized in that, It also includes a communication module (6), which is electrically connected to the control module (5).

9. A smart electromagnetic water meter with pipeline noise monitoring function according to claim 8, characterized in that, The control module (5) is connected to the external storage and computing module (7) through the communication module (6).

10. A smart electromagnetic water meter with pipeline noise monitoring function according to claim 1, characterized in that, It also includes a power supply module, which is electrically connected to the power input terminals of the metering module (1), the noise signal acquisition module (2), the signal conditioning module (3), and the control module (5), respectively.

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