RF retrofit assembly

Abstract

The present invention discloses a versatile RF retrofit assembly for energy meters, comprising a RF retrofit unit (104) and a secure fixture assembly (106) The RF retrofit unit (104) captures pulses from a calibration LED, utilizing a dynamic Stray Light Cancellation method. Additionally, a data concentration unit (600) with GSM-based remote monitoring and relay-based controlling capabilities (608) enhances overall functionality. The assembly seamlessly converts conventional energy meters into smart meters, enabling remote monitoring and control without the need for meter replacement. The assembly features a comprehensive RF retrofit unit (104) with a pulse detector circuit (104c), microcontroller board (608), RF trans-receiver module (606), and optional relay unit (105) for remote load control. The fixture assembly (106) ensures secure attachment with adjustable mechanisms, preventing tampering, maintaining unobstructed visibility. This invention is a holistic solution, combining efficiency, adaptability, and enhanced monitoring capabilities for the evolving landscape of energy metering.

Description

RF RETROFIT ASSEMBLYFIELD OF INVENTION

[0001] The present invention pertains to the field of electrical and electronics engineering. More particularly, it addresses innovations related to energy meters.BACKGROUND OF INVENTION

[0002] The background section addresses challenges associated with the existing system of manual energy meter reading, emphasizing the drawbacks of substantial manpower, time, and fuel consumption, along with potential issues like tampering and delayed readings. The introduction of smart energy meters has aimed to alleviate these concerns, yet the extensive replacement of conventional meters poses logistical and environmental challenges.

[0003] Numerous state-of-the-art methods for converting energy meters into smart versions have been disclosed. These include processes for computation of energy, devices preventing fraudulent use of electricity, on-site monitoring systems for intelligent electric energy meters, and automated reading devices integrating loT and GSM technologies. Additionally, methods involving Long- Range Radio Frequency (LoRa RF) gateways and advanced metering infrastructure (AMI) cartridges have been explored. While these advancements contribute to energy metering, there remains a need for solutions specifically focused on converting conventional energy meters into smart counterparts.

[0004] Smart energy meters have witnessed implementation in India over recent years, promising advanced monitoring and control capabilities. However, the formidable task of replacing all existing energy meters with new smart ones poses significant challenges. This transition could span one or two decades, and the associated disposal of electronic waste adds another layer of concern.

[0005] In state of the art, several methods for converting existing energy meters into smart energy meters are disclosed.

[0006] In state of the art, US8942934 discloses about the process of computation of energy by an energy meter or an energy monitoring device. The energy monitoring device includes a power data acquirer that acquires time-series power data measured by a power meter, a cycle detector that detects a single-cycle power data from the power data acquired by the acquirer, a divider that divides the single-cycle power data detected by the detector into an added-value creating portion and an unproductive portion, and a computing unit that computes an amount of energy consumed in the unproductive portion divided by the acquired power data.

[0007] In state of the art, CN207336603U discloses a kind of electric energy meter preventing fraudulent use of electricity monitoring device is the utility model is related to. Electric energy meter is equipped with pressure detecting module, photographing module, and power control module. When power meter temperature exceeds certain temperature, power cut-off information is fed back to control processor by control power down process module.

[0008] In state of the art, CN215641792U discloses an on-site monitoring device for metering of an intelligent electric energy meter comprises a main frame body. Main frame body comprises side fixing frames and a wireless antenna. The current of the intelligent electric meter is monitored, the change of the existing electric wire is reduced. The existing meter can be subjected to lossless transformation, and a circuit connecting electric wire does not need to be added.

[0009] In state of the art, IN201921027573 discloses an automated electricity meter reading device which consists of LDR (Light Dependent Resistor) connected to calibration of existing Electricity meter. LDR signals are sent as an input to Arduino Analog pin. Arduino detecting the input at Analog pin A0 increments the value of energy consumption stored in Arduino. Through digital pins the connected GSM module is signalled to send real time readings to the centralized server. Similarly, in the state of the art, IN201821030005 discloses an Automated Meter Reading Internet of Things (loT) device based on GSM. The system is developed by integrating loT devices. Through digital pins the connected GSM module is signalled to send real time readings to the centralized server. This data isnow utilized by Web application, Where the user real-time consumption is displayed, Bills are generated, Blackouts in the areas is plotted on the map using Map API and load analysis is done for power distribution.

[0010] In state of the art, IN201941008742 discloses a method for loT based automatically reading meter data and remotely controlling an electric meter using a Long-Range Radio Frequency (LoRa RF) gateway. The method includes determining that a load condition is met based on an analysis of the meter data. Further, the method includes remotely disconnecting or reconnecting a load switch.

[0011] In state of the art, WO2019184454 discloses an electric energy monitoring device and method, and an electric energy meter. Device comprises a voltage input terminal, type detection circuit, and signal switching circuit. Signal switching circuit is configured to provide a sampled inputted voltage signal to an analog-to-digital conversion circuit. In circumstances in which the output signal is an alternating current and voltage signal, the first monitoring circuit performs alternating current value monitoring.

[0012] In state of the art, US9057626 discloses an advanced metering infrastructure (AMI) cartridge which includes an AMI cartridge housing having an interior zone, and an AMI module system supported within the interior zone of the AMI cartridge module housing. The AMI module system includes an AMI module and an energy meter interface configured and disposed to detachably connect to an energy meter.

[0013] Majority of the studies explain the fundamentals of energy metering and smart energy metering scheme, however, only a few of these inventions focus on converting existing conventional energy meters to smart energy meters.

[0014] The urgency to implement smart energy meters for the goals of smart cities is recognized. However, the lengthy timeframe and substantial costs associated with the comprehensive replacement of existing meters present significant challenges. Furthermore, the issue of waste disposal of old energy meters adds to the complexity of the transition.

[0015] In light of these challenges, there is a compelling need for a comprehensive and rapid solution to implement smart energy meters, particularlyin countries facing similar issues to obviate above mentioned drawbacks of the existing prior art. Motivated by majority of above-mentioned challenges posed by the existing solutions, the inventors of the present invention embarked on a research journey to address and eliminate the longstanding limitations in the field. Their focus cantered on developing an instant invention that would surpass the drawbacks associated with prior art. By doing so, the inventors sought to revolutionize the landscape of smart energy metering, introducing a solution that is not confined to the constraints outlined above.OBJECT OF THE INVENTION

[0016] The present invention aims to address multiple existing challenges related to smart energy meters and provide a practical and efficient solution to convert existing conventional energy meters into smart ones rather than waiting for a long transition period which could span one or two decades to install smart energy meters in the areas wherever required.

[0017] The main object of present invention is to provide an easily deployable RF (radio-frequency) retrofit unit, aiming to convert existing energy meters into smart ones efficiently and cost-effectively.

[0018] Another object of present invention is to provide an innovative solution in the form of an RF retrofit unit which is specifically designed to seamlessly integrate with any existing energy meter, transforming it into a smart energy meter.

[0019] A further object of present invention is to provide a RF retrofit assembly which addresses critical concerns by being low-power, cost-effective, and easily producible at scale.

[0020] A still further object of present invention is to provide a radiofrequency (RF) retrofit unit which has effortless installation that is not only quickly deployable but also ensures ease of installation for seamless integration with existing energy meters.

[0021] Yet another objective of present invention is to provide a radiofrequency (RF).

[0022] Another object of present invention is to provide a radio-frequency (RF) retrofit unit which is tamper-resistant. It provides a tamperproof solution for smart remote monitoring and control of energy meters, safeguarding against unauthorized access or manipulation.

[0023] Yet another object of present invention is to provide a radiofrequency (RF) retrofit unit which is a practical and cost-effective solution for transforming conventional electronic energy meters into smart energy meters. This conversion allows for remote monitoring and control via RF wireless technology.

[0024] A further object of present invention is to design and deliver a NonIntrusive Retrofitting Assembly or fixture that enables the installation of the remote monitoring system over existing electronic energy meters without tampering with their integrity. The solution should not obstruct the basic reading view for manual readings, aligning with regulatory norms.

[0025] A still further object of present invention is to provide a Multilayer Communication System which establish a robust multilayer communication system to facilitate the centralized monitoring and control of all converted smart energy meters. This system should be adaptable to the requirements of state or national electricity regulatory authorities.

[0026] By addressing these objects, the present invention seeks to advance the field of smart energy metering, offering a comprehensive solution that balances functionality, security, and compliance with industry standards.SUMMARY OF THE INVENTION

[0027] This summary serves as an introduction to the innovative concepts related to smart energy metering, outlining the overall network architecture. Further details are provided in the subsequent detailed description. It is important to note that this summary is not intended to identify essential features of the claimed subject matter, nor is it intended to limit the scope of the claimed subject matter.

[0028] In one aspect of the present invention, it discloses a swiftly deploy able RF (radio-frequency) retrofit assembly.

[0029] In another aspect of the present invention, the RF retrofit unit, in conjunction with its fixture assembly, is designed for efficient installation on existing conventional energy meters, transforming them into intelligent, smart energy meters. The unit incorporates a wireless transmitter capable of sending energy consumption data to a server or data concentrator unit. Each unit possesses a unique device address and can be configured accordingly. Noteworthy features include low power consumption, cost-effectiveness, mass producibility, and installation without any interference with the existing energy meters. This aligns with the compliance requirements of electricity regulatory authorities.

[0030] Another innovative aspect of the invention introduces a pulse detector circuit designed to count pulses emitted by the calibration LED, a standard component in electronic energy meters. Employing a dynamic stray light cancellation algorithm, the circuit ensures accurate readings by minimizing the impact of external light sources. The counted pulses are converted into energy consumption data and transmitted in real time to the data concentrator unit / server. A light-dependent resistor (LDR) detects the blinking of the calibration LED, and its readings are relayed to the analog pin of a microcontroller. The microcontroller, utilizing the dynamic stray light cancellation algorithm, classifies pulses and calculates energy consumption.

[0031] Furthermore, in another aspect of the present invention, it discloses incorporates a mechanism for data collection from various converted smart energy meters using a data concentrator unit. This mechanism includes a wireless data transceiver that can connect with numerous devices in a specified area and link to the server for data mapping and automatic bill generation. This implementation serves to prevent losses, theft, tampering, and other malpractices in the energy meter reading and billing system.

[0032] Additionally, measures against fraudulent activities related to meter tampering are implemented. The meter features an auto-reset function triggered in case of tampered output connections, disconnected LDR detector, or significant changes in usage patterns. Authorized personnel are exclusively permitted to set up the meter, leaving an audit trail in the server for enhanced security and accountability.BRIEF DESCRIPTION OF DRAWINGS

[0033] The detailed description is elucidated with reference to the accompanying figures. In these figures, the leftmost digit(s) of a reference number denote the figure in which the reference number is first introduced. Consistent numbers are utilized across the drawings to denote similar features and components.

[0034] FIG. 1: A functional block drawing of a RF retrofit assembly in accordance with one embodiment of the present invention;

[0035] FIG. 2: It is a schematic drawing of a conventional energy meter in accordance with one embodiment of the present invention;

[0036] FIG. 3: It is a schematic drawing of a RF retrofit assembly of the RF retrofit unit without a relay in accordance with one embodiment of the present invention;

[0037] FIG. 4: It is a schematic drawing of a RF retrofit assembly of the RF retrofit unit with a relay in accordance with one embodiment of the present invention;

[0038] FIG. 5: It is a schematic drawing of a RF retrofit assembly, showing the complete assembly of the RF retrofit unit with a relay installed on an existing conventional energy meter in accordance with one embodiment of the present invention;

[0039] FIG. 6A: It is a schematic drawing of a RF retrofit unit, showing an internal functional block diagram of the RF retrofit unit without a relay in accordance with one embodiment of the present invention;

[0040] FIG. 6B: It is a schematic drawing of a RF retrofit unit, showing internal functional block diagram of the RF retrofit unit with a relay in accordance with one embodiment of the present invention;

[0041] FIG. 7: It is a schematic drawing of a spring-loaded fixture or clamp assembly meter in accordance with one embodiment of the present invention;

[0042] FIG. 8: It is a schematic drawing of a sliding fixture or clamp assembly in a vertical orientation meter in accordance with one embodiment of the present invention;

[0043] FIG. 9: It is a schematic drawing of a sliding fixture or clamp assembly in a horizontal manner meter in accordance with one embodiment of the present invention;

[0044] FIG. 10: It is a schematic drawing of a holding clamp fixture meter in accordance with one embodiment of the present invention;

[0045] FIG. 11: It is a schematic drawing of a suction clamp fixture meter in accordance with one embodiment of the present invention;

[0046] FIG. 12: It is a schematic drawing of a data concentrator unit meter in accordance with one embodiment of the present invention;

[0047] FIG. 13: It is a schematic drawing illustrating a data collection through wiring of meters meter in accordance with one embodiment of the present invention; and

[0048] FIG. 14: It is a schematic drawing of a RF Relay Box meter in accordance with one embodiment of the present invention.DETAILED DESCRIPTION OF THE INVENTION

[0049] The foregoing objects of the present invention are accomplished by the present invention as described below in the preferred / exemplary embodiments.

[0050] The present invention provides a comprehensive overview of the RF retrofit assembly. The primary focus is on converting existing conventional energy meters into smart energy meters using an RF retrofit unit, ensuring remote monitoring and control without the need for meter replacement or tampering.

[0051] The invention revolves around utilizing an RF retrofit unit that captures pulses from the calibration LED of the existing energy meter, employing a 'dynamic Stray Light Cancellation' method.

[0052] Some embodiments of this disclosure, illustrating all its features, may now be discussed in detail. The words “comprising”, “having”, “containing” and “including” and other forms thereof, are intended to be equivalent in meaning and be open ended in that an item or items following any one of these words is not meant to be an exhaustive listing of such item or items or meant to be limited to only the listed item or items. It must also be noted that, the singular forms “a”, “an”, and “the” include plural references unless the context clearly dictates otherwise, although any methods similar or equivalent to those described herein can be used in the practice or testing of embodiments of the present invention, wherein the exemplary methods are described. The disclosed embodiments are merely exemplary of the disclosure of the present invention, which may be embodied in various forms.

[0053] The use of the expression “RF” suggests “radio-frequency” and both expressions are used herein interchangeably and carries same meaning.

[0054] It may be understood by all readers of this written description that the example embodiments described herein and claimed hereafter may be suitably practiced in the absence of any recited feature, element or step that is, or is not, specifically disclosed herein. For instance, references in this written description to“one embodiment”, “an embodiment”, “an exemplary embodiment”, and the like, indicate that the embodiment described can include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. The disclosed embodiments are merely exemplary of various forms or combinations. Moreover, such phrases are not necessarily referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one of ordinary skill in the art to affect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.

[0055] No terminology in this application should be construed as indicating any non- claimed element as essential or critical. The use of any and all examples, or example language (e.g., “such as”) provided herein, is intended merely to better illuminate example embodiments and does not pose a limitation on the scope of the claims appended hereto unless otherwise claimed.

[0056] Recitation of ranges of values herein is merely intended to serve as a shorthand method of referring individually to each separate value falling within the range, unless otherwise indicated herein, and each separate value is incorporated into the specification as if it were individually recited herein. Where a specific range of values is provided, it is understood that each intervening value, to the tenth of the unit of the lower limit unless the context clearly dictates otherwise, between the upper and lower limit of that range and any other stated or intervening value in that stated range, is included therein. All smaller sub-ranges are also included.

[0057] The upper and lower limits of these smaller ranges are also included therein, subject to any specifically excluded limit in the stated range. The present invention is described in detail hereinafter. Indeed, the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure of the present invention shall satisfy the applicable legal requirements.

[0058] The RF retrofit assembly comprises an RF retrofit unit and a fixture assembly designed for easy installation into any conventional electronic energy meter. This retrofitting facilitates the conversion of conventional meters into smart energy meters, enabling remote monitoring and control by electricity regulatory authorities. Importantly, this process doesn't tamper with the existing meter or block its reading side view.

[0059] The main objective is to provide a cost-effective solution for converting conventional energy meters into smart meters without the need for replacement or tampering. This approach aims to rapidly implement smart energy metering schemes, reducing e-waste generation.

[0060] Referring to Fig. 1, it is a functional block drawing of a RF retrofit assembly illustrating the system configuration, comprising a conventional energy meter (102), a RF retrofit unit (104), a retrofit fixture assembly (106) and a calibration LED / light (108) with pulse detection and active stray light / backlight compensation circuit, in accordance with an embodiment of the present invention.

[0061] RF retrofit assembly which shows a comprehensive connectivity and functionality of the RF retrofit assembly. The RF retrofit assembly comprises two primary components: a RF retrofit unit (104) and a fixture assembly (106). The RF retrofit unit (104) and a fixture assembly (106) are intricately connected to the existing energy meter system, specifically to the calibration LED (108). The existing energy meter system itself is composed of the main energy meter board (100) and the conventional energy meter (102), which is equipped with an Optical / IR port (102b). The connectivity between the RF retrofit assembly and the existing energy meter is crucial for its seamless integration and functionality. The RF retrofit unit (104) is strategically connected to the calibration LED (108), emphasizing its role in capturing pulses emitted by the LED. This connection enables the assembly to effectively utilize the dynamic Stray Light Cancellation method, ensuring accurate pulse detection. The main energy meter board (100) serves as the central hub, orchestrating the communication and coordination between the RF retrofit unit, the existing energy meter, and other relevantcomponents. The existing energy meter (102) with its Optical / IR port (102b) is a fundamental part of the system, providing the necessary infrastructure for optical or infrared communication.

[0062] In summary, Fig. 1 showcases the interconnectivity of the RF retrofit assembly components, emphasizing their roles in capturing and processing data from the existing energy meter. This connectivity is essential for the assembly's overall functionality, enabling it to efficiently convert conventional energy meters into smart energy meters with remote monitoring and control capabilities.

[0063] In an alternate embodiment, the RF retrofit unit (104) is equipped with an inbuilt relay. This relay facilitates remote connection and disconnection of the load through wireless data transmission, offering flexibility to electricity regulatory authorities for actions such as non-bill payment, load shedding, emergency shut down, and similar scenarios.

[0064] Referring to Fig. 2, it is a schematic drawing of a conventional / existing energy meter (102) in accordance with another embodiment of the present invention, it is a body diagram detailing the structure of a conventional energy meter (102). The detailed illustration is provided for the existing energy meter (102), offering insights into its connectivity and functionality. This existing energy meter (102) is equipped with various components that play essential roles in its operation: LCD Display (102a):

[0065] The LCD display serves as the visual interface for presenting relevant information and readings to users. It is a key element for manual readings and provides real-time information about energy consumption.

[0066] Optical / IR Port (102b): The Optical / IR port is a crucial connectivity feature, enabling the energy meter to communicate using optical or infrared signals. This port facilitates external connections, potentially for data transfer, communication with other devices, or configuration purposes.

[0067] Screw Mounting Terminal Block (102c): This component is designed for secure mounting of the energy meter onto a surface. It ensures stability and proper positioning of the meter within its installation environment.

[0068] Input / Output Terminals (102e, 102f): These terminals are key points for electrical connections. Input terminals receive incoming electrical signals, while output terminals facilitate the distribution of electrical power to connected devices or appliances.

[0069] Cover Holding Screw (102g): The cover holding screw is an essential fastening element that secures the housing cover of the energy meter. It plays a critical role in maintaining the integrity of the meter's internal components and protecting them from external factors.

[0070] Calibration LED (108): The calibration LED is a vital component for pulse generation and calibration. In the context of the RF retrofit assembly, this LED serves as a light source for pulse detection by the RF retrofit unit (104).

[0071] In terms of connectivity and functionality, these components collectively contribute to the energy meter's ability to measure, display, and manage electrical consumption. The Optical / IR port, input / output terminals, and calibration LED are particularly significant in establishing communication and ensuring accurate data collection. The LCD display and cover holding screw enhance the user interface and physical integrity of the meter, respectively. This detailed representation in Fig. 2 highlights the diverse functionalities and interconnected features of the existing energy meter (102).

[0072] Referring to Fig. 3 and Fig. 4, Fig. 3 is a schematic drawing of a RF retrofit assembly of the RF retrofit unit (104) without a relay in accordance with one embodiment of the present invention, whereas Fig 4, is a schematic drawing of a RF retrofit assembly of the RF retrofit unit (104) with a relay in accordance with another embodiment of the present invention.

[0073] Fig. 3 and Fig. 4 offer detailed visual representations of the RF retrofit unit (104) in two distinct configurations: without and with a relay (105). InFig. 3, the RF retrofit unit is depicted without a relay, showcasing essential components such as the input terminal (104a) for electrical signal intake, the pulse detector circuit (104c) responsible for capturing pulses emitted by the calibration LED, a connecting wire / cable (104b) for data transmission, and the RF retrofit unit (104) fastening cable tie (104d) ensuring secure attachment. Transitioning to Fig. 4, the RF retrofit unit (104) is presented with the inclusion of a relay (105). In this configuration, relay output terminals (104e) are embedded in the unit. The relay serves as a pivotal component enabling remote load control capabilities, allowing the unit to remotely manage the connection and disconnection of electrical loads based on wireless data transmissions. In both configurations, the input terminal and connecting wire / cable play integral roles in establishing connectivity between the RF retrofit unit (104) and the existing energy meter (102). The pulse detector circuit ensures precise pulse capture for accurate energy consumption measurements. Additionally, the retrofit unit (104) fastening cable tie guarantees the unit's stable attachment. The relay, when present, expands the functionality by providing remote control capabilities for electrical loads. These figures collectively provide a comprehensive understanding of the internal components and capabilities of the RF retrofit unit (104) in different operational configurations.

[0074] In Fig. 5, a detailed representation showcases the final assembled structure of the RF retrofit unit (104) alongside the existing energy meter (102), providing insights into the connectivity and functionality of this integrated system. The integration process involves key steps to ensure a seamless operation: The RF retrofit unit (104) is effectively connected to the existing energy meter by being plugged into the bottom output terminal screws (102f). This connection point establishes a direct electrical link, facilitating communication between the retrofit unit and the energy meter system. Additionally, the pulse detector circuit (104c) is strategically positioned on the top acrylic covering the calibration LED, optimizing its exposure for the accurate capture of pulses emitted during calibration. Ensuring stability and immovability, the RF retrofit unit (104) is securely fastened to the energy meter using a fastening cable tie (104d). This step prevents unintended displacement and guarantees a secure attachment. Furthermore, the relay outputterminals (104e) embedded in the retrofit unit (104) contribute to the system's functionality by supplying power to the consumer. When activated, the relay enables controlled distribution of electrical power based on wireless data transmissions, introducing remote control capabilities. In summary, the assembled structure illustrates the effective integration of the RF retrofit unit (104) with the existing energy meter (102), highlighting key steps and components that ensure accurate pulse detection, stability, and remote control functionality.

[0075] Referring to Fig. 6A and Fig. 6B, Fig. 6A is a schematic drawing of a RF retrofit unit (104), showing internal functional block diagram of the RF retrofit unit (104), without a relay in accordance with one embodiment of the present invention, whereas 6B is a schematic drawing of a RF retrofit unit (104), showing internal functional block diagram of the RF retrofit unit (104) with a relay in accordance with another embodiment of the present invention.

[0076] Fig. 6 A and Fig. 6B offer an internal functional block diagrams of the RF retrofit unit (104), providing a comprehensive understanding of its components and their interactions in two distinct configurations. In Fig. 6 A, representing the RF retrofit unit (104) without a relay, crucial components include the LED pulse detector circuit, responsible for precise pulse capture from the energy meter's calibration LED. The microcontroller board serves as the central processing unit, orchestrating various functions, while the switching power supply ensures stable power distribution. Additionally, the RF trans-receiver module enables wireless communication, facilitating data transmission. Transitioning to Fig. 6B, the diagram introduces the relay unit to the RF retrofit unit (104). The relay acts as a switch, allowing remote control of electrical loads. This additional component enhances the unit's functionality by providing the capability to disconnect or reconnect electrical loads based on wireless commands. Overall, these internal block diagrams illustrate the connectivity and functionality of the RF retrofit unit (104). The pulse detector circuit captures crucial data, the microcontroller manages operations, the switching power supply ensures power stability, and the RF trans- receiver module enables wireless communication. The inclusion of the relay unit inFig. 6B extends the unit's capabilities to include remote load control, broadening its applications in energy management and control systems.

[0077] Referring to Fig. 7, it is a schematic drawing of a spring-loaded fixture or clamp assembly meter in accordance with an alternative embodiment of the present invention. The invention is unveiled, detailing the clamp for the fixture assembly (300) of the RF retrofit unit (104) as it is applied over the existing energy meter (102). This illustration provides a nuanced understanding of the connectivity and functionality embedded within the fixture assembly (300). The sensor housing (301) encapsulates the RF retrofit unit (104), ensuring its secure placement over the existing energy meter (102). The slider holder (302) facilitates a sliding mechanism, allowing dynamic adjustment of the clamp's width during mounting. This adaptable feature, coupled with the spring-loaded mechanism, accommodates varying energy meter sizes, guaranteeing a snug fit without compromising stability. A key element is the spring-loaded mechanism, which enables on-the-fly adjustment of the clamp's width, ensuring a tailored and secure installation on different energy meter dimensions. The clamp fixture holding brackets, intricately designed, play a crucial role in maintaining stability, securing the assembly in place during operation. Soft material rubber pads (304) on the clamp fixture holding brackets add a protective layer, preventing any potential damage to the surface of the existing energy meter (102). This thoughtful inclusion ensures that the retrofit assembly can be securely affixed without compromising the integrity of the meter. Connectivity, in this context, is primarily centered around the secure attachment of the fixture assembly (300) to the existing energy meter (102). The dynamic features, such as the spring- loaded mechanism and slider holder, contribute to the adaptability of the clamp fixture, allowing for a customizable fit on various energy meter sizes. Functionally, this embodiment excels in securely and non-intrusively attaching the RF retrofit unit (104) to the existing energy meter (102). The dynamic and adjustable features, along with the protective rubber pads, collectively contribute to a solution that is both versatile and user-friendly. Fig. 7 underscores the embodiment's focus on adaptability, secure attachment, and protection, offering a seamless and efficient means of integrating the RF retrofit unit (104) with existing energy meters.

[0078] Referring to Fig. 8, it is a schematic drawing of a sliding fixture or clamp assembly in a vertical orientation meter in accordance with one embodiment of the present invention. Fig. 8 introduces an innovative embodiment of the clamp for the fixture assembly (300), featuring a unique design where the sensor housing (301) is affixed to an arm passing through the slider holder (302). This configuration incorporates a mechanism allowing for the adjustment of height or width, providing remarkable flexibility for attachment to any side of the existing energy meter (102). The inclusion of right-angle brackets with soft material rubber pads (304) at the ends adds an extra layer of functionality, securely holding the top cover of the existing energy meter without causing any damage. This design variation enhances the adaptability of the fixture assembly, allowing it to be customized based on the specific dimensions and orientation of the energy meter.

[0079] Referring to Fig. 9, it is a schematic drawing of a sliding fixture or clamp assembly in a horizontal manner meter in accordance with an alternative embodiment of the present invention. Fig. 9 demonstrates an alternative arrangement in which the fixture assembly (300) is horizontally connected to the existing energy meter (102), showcasing the versatility of the retrofit solution. Connectivity in this embodiment is characterized by the fixture assembly's ability to seamlessly adapt to different sides of the energy meter. The height or width adjustment mechanism, combined with the arm passing through the slider holder, enables a dynamic and versatile attachment process. Functionally, this embodiment excels in providing an alternative design that prioritizes versatility. The height or width adjustment mechanism allows for customized attachment, and the right-angle brackets with rubber pads contribute to secure and damage-free placement, emphasizing the user-friendly nature of the retrofit solution. In summary, Fig. 8 presents an embodiment that stands out for its adaptability and inventive design, offering users a flexible and customizable solution for integrating the RF retrofit unit with existing energy meters.

[0080] Referring to Fig. 10, it is a schematic drawing of a holding clamp fixture meter in accordance with one embodiment of the present invention. In Fig.10, an additional embodiment of the RF retrofit unit fixture assembly (400) is unveiled, presenting a detailed configuration that enhances the functionality of the retrofit assembly. This iteration includes essential components such as soft material pads (402) for protective grip, a pulse detector or reader device (404) to accurately count the calibration LED's blinking, a tension wire (406) for securing the fixture clamp assembly, and a connecting wire / cable (408) for seamless integration with the RF retrofit unit (104). Together, these components contribute to the robustness and effectiveness of the retrofit solution.

[0081] Referring to Fig. 11, it is a schematic drawing of a suction clamp fixture meter in accordance with alternative embodiment of the present invention. The design shown in Fig. 11 introduces an alternative embodiment of the present invention which portrays a suction-type fixture assembly (500). This configuration addresses specific installation considerations, incorporating a suction cup holder (504) affixed to the existing energy meter (102), a slider rod (502) for precise positioning, and a rotating ratchet mechanism (506) for adjusting the suction cup holder's angle. The design aims to maximize space utilization, ensure an unobstructed main reading view of the energy meter, and align with non-tampering norms established by electricity regulatory authorities. Connectivity in both embodiments is facilitated by the connecting wire / cable, ensuring seamless communication between the fixture assembly and the RF retrofit unit. Functionally, these designs prioritize user-friendly installation, protection of the energy meter, and adherence to regulatory guidelines, offering versatile solutions for integrating the RF retrofit assembly with diverse energy meter setups.

[0082] Referring to Fig. 12, it is a schematic drawing of a data concentrator unit meter in accordance with one embodiment of the present invention. It shows a functional block representation of the data concentrator unit meter. In Fig. 12, a crucial embodiment is revealed, presenting the detailed configuration of a data concentrator unit (600) within the RF retrofit assembly. This unit serves as a central hub, orchestrating the collection and transmission of data from various devices within a specified area. The interconnected components of the data concentratorunit are elucidated to provide a comprehensive insight into its connectivity and functionality. The switching power supply (602) stands as a foundational element, ensuring a stable and reliable power source for the internal components. This includes powering the GSM module (604) responsible for mobile network communication, the RF trans-receiver module (606) facilitating wireless communication, and the micro-controller board (608) acting as the control center. The micro-controller board coordinates the operation, processing incoming data and managing communication protocols. The collective data is then transmitted to the cloud server (610) maintained by the electricity regulatory authority, serving as a centralized repository for efficient storage, analysis, and monitoring of data from diverse devices connected to the data concentrator unit. Connectivity within this embodiment is multifaceted, with each component playing a distinct role. The switching power supply ensures consistent power, the GSM module establishes mobile network connectivity, the RF trans-receiver module enables wireless communication, and the micro-controller board governs the overall operation. This interconnected system ensures seamless data flow within the broader RF retrofit assembly. The functionality of the data concentrator unit is paramount, as it acts as a central aggregation point for data from various RF retrofit units and compatible devices. Leveraging the capabilities of the GSM and RF trans-receiver modules, coupled with the processing power of the micro -controller board, the unit facilitates efficient data transmission to the designated cloud server. In essence, Fig. 12 highlights the pivotal role of the data concentrator unit in optimizing data collection, fostering connectivity, and enhancing the overall efficiency of the RF retrofit assembly.

[0083] Referring to Fig. 13, it is a schematic drawing illustrating a data collection through wiring of meters meter in accordance with one embodiment of the present invention. In Fig. 13, a distinctive embodiment unfolds, revealing the intricacies of the wiring configuration for energy meters within a building using RS485 or a similar standard. This particular setup is designed for cost-effective and efficient data transmission from converted energy meters to a centralized data concentrator unit. The illustration provides a structural representation, emphasizingthe connectivity and communication protocols integral to this arrangement. The central components include energy meters equipped with optical IR / RS232 / RS485 / RS486 or any serial communication port (704). A network of optical cables (702) connects these meters to the data concentrator unit (700), establishing a seamless data transfer and communication network. The data concentrator unit serves as the central hub, collecting and processing data from connected energy meters. A crucial element in this setup is the RS486 cable, utilized to connect the Calibration LED of meters of any type. This cable consolidates pulse data generated by the Calibration LED and channels it to a single RF communication / GSM unit. The RF communication / GSM unit acts as a bridge, receiving data from multiple meters via the RS486 cable and efficiently transferring this consolidated information to the central data concentrator unit using RF communication or GSM technology. Connectivity is established through a network of optical cables, RS486 cables, and RF communication / GSM units, facilitating seamless communication between individual energy meters and the central data processing unit. The functionality of this arrangement optimizes data transmission in a cost-effective manner, specifically tailored for multi-meter connectivity within apartment buildings. In summary, Fig. 13 showcases an embodiment that addresses the practical and economical aspects of connecting multiple energy meters within a building, providing an efficient solution for data collection and transmission to a centralized processing unit.

[0084] Referring to Fig. 14, it is a schematic drawing of a RF Relay Box meter in accordance with one embodiment of the present invention. In one embodiment of the present invention, Fig. 3 illustrates the RF retrofit unit (104) without a relay, and a separate RF Relay Box is utilized, as shown in Fig. 14. This box is mounted on the upper side of a utility electric pole, where AC supply cables are distributed to consumers. Instead of the AC supply cables going directly to the consumer, they are connected to the RF relay Pole unit shown in Fig. 14. This unit consists of a Microcontroller (800a), an RF / GSM module (800b), a Switching power supply (800c), and six relays (800d), (800e), (800f), (800g), (800h), and (800i). The disconnection and re-connection of AC supply to the consumer aremanaged through the relays in this unit, which individually supply AC power to different consumers. The RF / GSM modules act as transceivers to receive or upload data to the cloud server for disconnecting and re-connecting relays using commands sent through the web-based software of the Electric Utility.

[0085] In another embodiment of the present invention, the pulse detector circuit (104c) uses a dynamic stray light cancellation algorithm to reduce the effect of other light sources on pulse detection. The calibration LED reader unit may have a small convex lens inside to capture and focus the calibration LED light blinking onto the photo sensor (an LDR) in the LED reader unit. In the calibration LED reader application, optionally, the energy meter is covered with black tape or a black-colored polycarbonate cover on the top transparent area of the meter to prevent external ambient light from entering the LED reader unit, as ambient light may introduce errors in the reading. The present invention employs a Light Dependent Resistor (LDR) as a sensor for detecting pulses on the energy meter. The LDR is strategically positioned to sense the LED flash from the calibration LED located on the front surface of the energy meter. When the LED flashes, the change in resistance of the LDR is detected by an loT controller. The detected signal, in the form of voltage (0-3.3 V), is processed through a signal conditioning circuit and counted as a pulse. The pulse count is then transmitted to the server. The LDR's wide sensing angle allows for flexible installation on the energy meter.

[0086] In an alternative embodiment, a Photodiode, specifically the LTR301, is utilized for pulse detection (not shown in figures). Similar to the LDR, the Photodiode is strategically placed in front of the LED on the energy meter. The change in current of the Photodiode, triggered by the LED flash, is detected by the loT controller. The signal is processed and counted as a pulse, with the count subsequently sent to the server. The Photodiode, having a narrower sensing angle, demands precise installation accuracy on the energy meter.

[0087] The invention also contemplates the use of a Color Sensor for pulse detection on the energy meter (not shown in figures). This sensor captures the color bands of visible light emitted by the LED. The RGB color proportion is sorted bythe sensor module, and any change in proportion is communicated to the controller via a serial communication protocol. Based on the change in RGB color proportion, the pulse is detected, counted, and transmitted to the server. The Color Sensor, with its narrow sensing range, requires accurate installation on the energy meter.

[0088] In an alternative embodiment, a Camera Module is employed to capture images of the LED on the energy meter (not shown in figures). The greyscale proportion in the images is measured by the module, and any change in greyscale is processed by image processing software. When the LED blinks, the change in greyscale is detected, and the corresponding pulse count is sent to the controller, which then transmits the count to the server. The Camera Module, being sensitive to alignment, necessitates robust and precise installation.

[0089] In another embodiment of the present invention, the overall retrofit assembly provides a comprehensive solution for converting conventional energy meters into smart meters, offering enhanced monitoring and control capabilities without the need for meter replacement. The RF retrofit assembly (104) converting existing conventional energy meters into smart energy meters can be utilized in various fields, including but not limited to:• Remote power metering• Remote water metering• Low-cost consumer appliances• Military applications• Smart home

[0090] The present invention provides a tamperproof smart remote monitoring and controlling solution for energy meters with the RF retrofit assembly. The RF retrofit unit (104) is easily and quickly pluggable into existing conventional energy meters, converting them into smart energy meters. It utilizes the principle of the calibration LED to calculate energy consumption, eliminating the need for tampering with the existing meter. This invention offers a cost-effective and mass-producible solution for the rapid implementation of smart metering schemes across the country. The state electricity board can monitor energy meterreadings in real-time and control the operation of the relay, similar to a smart energy meter.

[0091] The embodiments, examples, and alternatives of the preceding paragraphs or the description and drawings, including any of their various aspects or respective individual features are only exemplary, may be taken independently or in any combination thereof. Features described in connection with one embodiment apply to all embodiments, unless such features are incompatible.

[0092] Different characteristics and beneficial particulars are unfolded fully with reference to the embodiments / aspects which are exemplified in the accompanying drawing and detailed in the preceding description. Descriptions of various aspects or respective individual features that a person skilled in the art is well aware of or those form common general knowledge in the field pertaining to the present subject matter is not described and / or introduced for the purpose of focusing on the present subject matter and not to obscure the present subject matter and advantageous features thereof. At the same time the present subject matter and its features that are explained herein in the detailed description and the specific examples, are given by way of illustration only, and not by way of limitation. It is to be understood that a person skilled in the art may and can think of various alternative substitutions, modifications, additions, and / or rearrangements which are considered to be within the spirit and / or scope of the underlying inventive concept of the present invention.

Claims

WHAT IS CLAIMED IS:

1. A RF retrofit assembly for energy meters, comprising: a. a RF retrofit unit (104) configured for wireless data transmission; b. a fixture assembly (106) designed for secure attachment to existing conventional energy meters; c. a calibration LED (108), wherein said RF retrofit unit (104) capturing pulses from, a calibration LED, implementing a dynamic Stray Light Cancellation method; and d. a data concentration unit (600) with GSM based remote monitoring and relay based controlling capabilities, establishing a seamless interface with the RF retrofit unit (104) and enhancing overall functionality, wherein the RF retrofit assembly facilitates the conversion of conventional energy meters into smart energy meters, empowering remote monitoring and control without the need for meter replacement or disruption.

2. The retrofit assembly of Claim 1, wherein the RF retrofit unit (104) captures pulses from the calibration LED using a lens for capturing and focusing calibration LED light, effectively reducing the impact of ambient light.

3. The retrofit assembly of Claim 1, wherein the RF retrofit unit (104) captures pulses from the calibration LED, and the fixture assembly (106) includes a clamp mechanism with an adjustable spring-loaded (400), sliding (306), or suction design (500) to accommodate various energy meter sizes, ensuring a versatile and secure attachment.

4. A radio-frequency (RF) retrofit unit (104) for converting existing conventional energy meters into smart energy meters, comprising: a. a pulse detector circuit (104c) for capturing pulses from the calibration LED; b. a microcontroller board (608) with a switching power supply;c. an RF trans-receiver module (606) for wireless data transmission; and d. a relay unit (105) for remote load control, optionally.

5. The RF retrofit unit (104) of Claim 4, wherein the pulse detector circuit (104c) includes a color detection mechanism for the calibration LED, reducing the effect of ambient light.

6. A fixture assembly (106) for securing the Sensor housing unit to existing conventional energy meters, comprising: a. a clamp mechanism (300) with an adjustable spring-loaded (400), sliding (306), or suction design (500); b. soft material pads (304) to prevent damage to existing energy meters; c. adjustment mechanisms (400) for accommodating different energy meter sizes and for avoiding tampering and blocking of the existing energy meter's view; and d. a vacuum-impregnated cover for sensor housing unit.

7. The fixture assembly of Claim 6, wherein the clamp mechanism (300) includes an adjustable spring-loaded (400), sliding (306), or suction design (500) to accommodate various energy meter sizes.

8. The fixture assembly of Claim 6, wherein the vacuum-impregnated cover (104c) for the Sensor housing unit provides enhanced durability.

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