Patent Publication Number: US-2011074601-A1

Title: Utility meter with flow rate sensitivity shut off

Description:
PRIORITY CLAIM 
     This application claims the benefit of previously filed U.S. Provisional Patent Application entitled “UTILITY METER WITH MAX FLOW SHUT OFF,” assigned U.S. Ser. No. 61/247,146, filed Sep. 30, 2009, and which is incorporated herein by reference for all purposes. 
    
    
     FIELD OF THE INVENTION 
     The present subject matter relates to gas metrology devices. More particularly, the present subject matter relates to safety-related gas shut-off apparatus and methodologies within a utility meter. 
     BACKGROUND OF THE INVENTION 
     Utility companies perform a critically important task of providing needed commodities such as electrical power, gas, water, and others to businesses and households. Such commodities not only make possible desired comfort but provide a truly fundamental cornerstone of modern living. In turn, processes have evolved in response to demand/need for ever increasing efficient reading and interaction with meters installed at such locations, to facilitate requisite and appropriate billing for the services of providing such commodities. Such efforts have more recently evolved from expensive, time-consuming personnel-intensive efforts, requiring on-site inspection and/or handling of meter issues and related concerns, to relatively more remotely controlled events and servicing. 
     The need for such “remote” activities, whether meter reading or adjunct meter and/or commodities management, have grown both in scope and type. In other words, not only is it desired to remotely detect meter readings and conduct activities adjunct thereto, but also to detect and manage equipment malfunctions, whether occurring naturally (such as storm related), or occurring intentionally (such as in meter tampering or commodities theft). It is also highly desirable to provide systems and controls that can prevent problems before they happen and/or provide relatively early detection and effective management. 
     In many instances, the prospect of equipment malfunction (whether through tampering, accidents, or longevity/maintenance failures) can raise serious safety issues inherent to the commodities being delivered/managed on-site. For example, emergencies may arise due to gas leakages, or fires, whether originated from gas, electrical, or other sources. In fact, a number of potential safety problems are well known in the industry. Accordingly, management and control of metering systems and related delivering a variety of commodities remains an important area of interest from a safety perspective, particularly as industry and societal needs drive requirements for ever-increasing remotely based activities/management. 
     Various patents and patent applications provide disclosures directed to gas or fluid metering or distribution systems that may include aspects relating to shut off valve control or management. 
     For example, U.S. Pat. No. 7,088,239 to Basinger et al. discloses an apparatus for routine monitoring and automatic reporting of electrical power and gas utility usage that also provides means for detecting and reporting to the relevant utility companies the development of local hazards on premises at which one or more utility usage meters are installed. The system includes a remote computer capable of turning on or off the supply of gas at the meter, perhaps as a result of the utility user not having made timely payments for the usage of gas. The meter has the capability to send a return or confirmation signal to the remote computer to confirm that the supply of gas has been shut off. 
     U.S. Pat. No. 7,458,387 to McGill discloses an emergency gas and electricity cutoff apparatus and control system. A further feature of the control system is the ability to detect flow problems, such as excess flow rates, that exceed a predetermined set point. The control system has the capability to remotely actuate a shutoff valve in response to an excess flow rate. 
     U.S. Pat. No. 4,866,633 to Nakane et al. is directed to an apparatus in which a flow rate of a gas is measured by a flow rate measurement means, and when the flow rate exceeds a predetermined reference value, occurrence of an abnormal state such as escape of the gas is detected and a shutoff means is automatically closed by control of a microcomputer. An abnormal state includes an increase in the flow rate of the gas beyond a predetermined threshold. 
     U.S. Pat. No. 6,000,931 to Tanabe et al. is directed to a gas safety control system for supplying a gas that is forwarded from a gas supply source through an inspection meter to one or more gas appliances. The system includes a valve control unit for actuating a cut off valve to shut off the supply of gas when an abnormality is detected. An abnormality includes an abnormal flow rate of gas. 
     U.S. Pat. No. 6,470,903 to Reyman discloses an automatically actuated regulation system for a natural gas pipeline. The system may be integrated with a gas meter. The system includes a shutoff valve that may automatically shutoff the flow of gas when: (1) there is a vibration that surpasses a certain threshold; and (2) flow in the natural gas pipeline has increased to a certain threshold. 
     U.S. Pat. No. 6,513,545 to Rhone et al. discloses a flow shut off valve for use with a pressurized fluid application and which is actuated in response to a flow rate exceeding a maximum allowable rating. 
     The disclosures of all such patent related publications referenced herein are fully incorporated herein by reference for all purposes. 
     While various implementations of gas shut-off apparatus and methodologies have been developed, no design has emerged that generally encompasses all of the desired characteristics as hereafter presented in accordance with the subject technology. 
     SUMMARY OF THE INVENTION 
     In view of the recognized features encountered in the prior art and addressed by the present subject matter, improved apparatus and methodologies for providing disconnection of a gas consumer by way of a metrology device and/or functionality has been provided. 
     In an exemplary configuration, a present exemplary remotely operable valve has been advantageously associated with a gas metering device. 
     In one of their simpler forms, an exemplary present safety-related remotely operable valve has been incorporated into a gas metering device. 
     Another positive aspect of exemplary embodiments of the present type of device is that gas utility services may easily be remotely disconnected without necessarily having to send equipment and personnel to the gas consumption location. 
     In accordance with aspects of certain embodiments of the present subject matter, methodologies are provided to provide safety-related gas disconnection by a metrology device on its own initiative upon sensing predetermined gas related conditions. 
     In accordance with further aspects of other embodiments of the present subject matter, methodologies are provided to disconnect selected gas utilities by way of safety-related disconnection commands sent internally within the metrology environment. 
     It should be appreciated by those of ordinary skill in the art from the complete disclosure herewith that the present subject matter is intended to equally encompass both devices and associated methodologies. 
     One present exemplary embodiment in accordance with the subject technology relates to an advanced meter reading system for transmitting fluid flow utility consumption data between user locations and a centralized data collection facility. Such a present exemplary system preferably comprises a plurality of utility metrology means and associated endpoint devices, situated at respective locations of utility consumption, for transmitting utility consumption data associated with a respective location; at least one fluid flow sensor means, associated with at least one of such utility metrology means and its associated endpoint device, for sensing whenever the fluid flow rate at its respective location is outside of set parameters; at least one disconnect valve means, associated with such at least one fluid flow sensor means, for disconnecting a fluid flow utility supply associated with such at least one utility metrology means at its respective location whenever such fluid flow sensor means senses fluid flow rate thereat outside of such set parameters; a main communications network for communications with such endpoint devices; and a head end processor for communications with such main communications network, such that utility consumption data are communicated to such head end processor via such main communications network. 
     In variations of the foregoing, such fluid flow utility supply may comprise a utility pipeline; such disconnect valve means may comprise a controllable disconnect valve inline with such pipeline at such respective location; and such fluid flow sensor means may comprise respective flow input and output sensors relative to associated utility metrology means. In other variations, such set parameters may comprise one of above a set maximum flow rate threshold or below a set minimum flow rate threshold. 
     Yet other present exemplary system embodiments may further include at least one collector, for bidirectional communications with such endpoint devices and such main communications network; and a plurality of respective fluid flow sensor means and associated disconnect valve means, respectively associated with selected of such endpoint devices, for respectively disconnecting a fluid flow utility supply associated with such locations in response to respective fluid flow rates thereat outside of set parameters; and wherein such utility consumption comprises one of gas and water consumption. 
     Other alternative present advanced meter reading systems may further include a plurality of respective fluid flow sensor means and associated disconnect valve means, respectively associated with selected of such endpoint devices, for respectively disconnecting a fluid flow utility supply associated with such locations in response to respective fluid flow rates thereat outside of set parameters; wherein such utility consumption may comprise gas consumption; such fluid flow utility supply comprises a utility pipeline; such utility metrology means may comprise respective gas meters; and such disconnect valve means may comprise a controllable disconnect valve inline with such pipeline at such respective location, and situated one of inside and outside an associated metrology means. 
     Yet in other present alternative systems, communications on such main communications network may be bidirectional; such disconnect valve means may also be responsive to a disconnect signal command received at its associated endpoint; and such system may further include a mobile device in RF communication with other components of such system, for controllably receiving utility consumption data and sending disconnect signal commands. Further per such alternative present systems, at least one telemetry device may be further included, respectively associated with such fluid flow sensor means for forwarding alarm signaling to such head end processor whenever monitored fluid flow rate thereat falls outside set parameters. 
     Per other present variations, such head end processor may further include data management functionality, for storing and processing utility consumption data; and such main communications network may comprise one of a WAN, a wireless network, and the internet. 
     Per yet others, exemplary present systems may further include at least one collector, for bidirectional communications with such endpoint devices and such main communications network; a plurality of respective fluid flow sensor means and associated disconnect valve means, respectively associated with selected of such endpoint devices, for respectively disconnecting a fluid flow utility supply associated with such locations in response to respective fluid flow rates thereat outside of set parameters; and a mobile device in RF communication with other components of such system, for controllably receiving utility consumption data and sending disconnect signal commands; wherein such utility consumption may comprise gas consumption; such utility metrology means may comprise respective gas meters; such utility supply may comprise a gas line associated with such utility consumption locations; such disconnect valve means may comprise a controllable disconnect valve inline with such supply gas line and associated with its respective endpoint device; such head end processor may further include data management functionality, for storing and processing utility consumption data; and such main communications network may comprise one of a WAN, a wireless network, and the internet. 
     Another present exemplary embodiment in accordance with the current technology may relate to a bidirectional gas AMI network for transmitting commands and gas usage data between user locations and a centralized data collection facility. Such an exemplary present network preferably may comprise a plurality of combined gas metrology/endpoint devices for obtaining and transmitting gas usage data associated with its respective location; a plurality of disconnect valve means, respectively associated with selected of such endpoint devices, for respectively disconnecting a utility supply associated with such endpoint device locations in response to respective disconnect signals provided thereto; flow rate sensor means, associated with at least one of such utility metrology means and its associated endpoint device, for sensing whenever the gas flow rate at its respective location is outside of set parameters, and signaling an associated disconnect valve means for disconnecting such respective location from a supply of gas; a WAN; a plurality of data collection devices, for bidirectional communications with selected of such metrology/endpoint devices and such WAN; and a centralized data collection facility in bidirectional communication with such WAN, for receiving and processing gas usage data, and for selectively transmitting respective disconnect signals to targeted endpoint device locations for terminating utility supply thereat. 
     Per a present exemplary variation thereof, such network may further include a supply gas line associated with such gas metrology/endpoint locations; and wherein such flow rate sensor means may comprise respective flow input and output sensors relative to associated utility metrology means. Still other alternative present networks may further include a mobile device in RF communication with other components of such network, for controllably receiving gas usage data and sending disconnect signal commands. Yet other alternatives may further include meter data management means associated with such centralized data collection facility, for storing and processing data received via such network. 
     Yet other present embodiments may relate to corresponding methodologies, such as an exemplary method for gathering data for monitoring gas consumption associated with a gas pipeline of a gas utility provider, and for selectively disconnecting gas supplies at selected locations, using flow rate sensitivity. Such presently exemplary method may preferably comprise determining and transmitting gas consumption data from a plurality of paired metrology and endpoint devices associated with respective locations of gas utility usage; communicating such data to a head end processor at a central location via a main communications network; and at selected locations of gas utility usage, detecting gas flow rates outside of set parameters, and activating disconnect valves thereat, to disconnect such locations from an associated gas supply. With such exemplary methodology, gas consumption data are collected and communicated to a central location for processing, while safety-related gas supply disconnections are conducted based on per location gas flow rate conditions. 
     Alternative present methods may further include transmitting the gas consumption data to at least one collector, which bidirectionally communicates with the head end processor via such main communications network; and selectively transmitting disconnect signal commands from such head end processor via such main communications network to selectively activate disconnect valves at selected locations of gas utility usage, to permit efficient monitoring and control of gas utility usage and associated gas supply by a gas utility provider. 
     In some present alternatives, detecting gas flow rates may include comparing determinations of respective flow input and output sensors relative to associated utility metrology means. Still further, other present alternative methods may further include using a mobile device in RF communication with other components of such network, for controllably receiving gas consumption data and for sending disconnect signal commands to selectively activate disconnect valves at selected locations of gas utility usage. 
     Other present alternative methods may further include conducting data management at the central location, for storing and processing gas consumption data; and wherein the network at least in part may comprise one of a WAN, a wireless network, and the internet. In certain present alternatives, exemplary methods may further include providing alarm signals to the head end processor whenever disconnect valves are activated in response to detecting gas flow rates outside of set parameters. 
     Additional objects and advantages of the present subject matter are set forth in, or will be apparent to, those of ordinary skill in the art from the detailed description herein. Also, it should be further appreciated that modifications and variations to the specifically illustrated, referred and discussed features, elements, and steps hereof may be practiced in various embodiments and uses of the present subject matter without departing from the spirit and scope of the subject matter. Variations may include, but are not limited to, substitution of equivalent means, features, or steps for those illustrated, referenced, or discussed, and the functional, operational, or positional reversal of various parts, features, steps, or the like. 
     Still further, it is to be understood that different embodiments, as well as different presently preferred embodiments, of the present subject matter may include various combinations or configurations of presently disclosed features, steps, or elements, or their equivalents (including combinations of features, parts, or steps or configurations thereof not expressly shown in the figures or stated in the detailed description of such figures). Additional embodiments of the present subject matter, not necessarily expressed in the summarized section, may include and incorporate various combinations of aspects of features, components, or steps referenced in the summarized objects above, and/or other features, components, or steps as otherwise discussed in this application. Those of ordinary skill in the art will better appreciate the features and aspects of such embodiments, and others, upon review of the remainder of the specification. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       A full and enabling disclosure of the present subject matter, including the best mode thereof, directed to one of ordinary skill in the art, is set forth in the specification, which makes reference to the appended figures, in which: 
         FIG. 1  is a block diagram of an exemplary Advanced Metering System (AMS) usable in accordance with the present subject matter for safety-related remote disconnection functionality; 
         FIG. 2  illustrates a representative block diagram overview of a portion of an exemplary Advanced Metering System (AMS) including an associated handheld or mobile device and such device&#39;s operational relationship with the AMS; and 
         FIG. 3  is a general representation of a gas metering device incorporating a controllable disconnect valve in accordance with present technology. 
     
    
    
     Repeat use of reference characters throughout the present specification and appended drawings is intended to represent same or analogous features, elements, or steps of the present subject matter. 
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     As discussed in the Summary of the Invention section, the present subject matter is particularly concerned with apparatus and methodologies for providing disconnection of a gas consumer by way of a metrology device and/or related functionality. 
     Selected combinations of aspects of the disclosed technology correspond to a plurality of different embodiments of the present subject matter. It should be noted that each of the exemplary embodiments presented and discussed herein should not insinuate limitations of the present subject matter. Features or steps illustrated or described as part of one embodiment may be used in combination with aspects of another embodiment to yield yet further embodiments. Additionally, certain features may be interchanged with similar devices or features not expressly mentioned which perform the same or similar function. 
     Reference is made in detail to the presently preferred embodiments of a subject telemetry system with which safety-related communications of the present subject matter may be practiced. Referring now to the drawings,  FIG. 1  illustrates an exemplary telemetry system generally  100 , which may include various exemplary telemetry endpoints  110 ,  112 ,  114 , and  116  located within, for example, a Gas AMI network, and which are read by network collectors  130 . Telemetry endpoints may include, but are not limited to, a pressure monitor  110 , a data corrector  112 , cathodic protection apparatus  114 , and general telemetry apparatus  116 . Such exemplary telemetry endpoints  110 ,  112 ,  114 , and  116  may be connected for data transmission via transmission paths  120 ,  122 ,  124 , and  126 , respectively, to collectors  130 . 
     It should be appreciated that while transmission paths  120 ,  122 ,  124 , and  126  are presently illustrated as transmission lines, such is not a specific limitation of the present technology as data may be transmitted by any suitable technology, including via wired as well as wireless technology. In similar fashion, transmission paths  162 ,  164 ,  166 , and  168  (illustrated as variously coupled data between head end associated items) may also correspond to any suitable data transmission capable device or methodology, now existing or later developed. 
     Those of ordinary skill in the art will appreciate that the illustration in  FIG. 1  with respect to the network configuration is exemplary and that other components, for example, but not limited to, repeaters, may also be employed. It should be appreciated that while the present subject matter is described more specifically as directed to gas AMI networks, such is not a specific limitation of the disclosure as the present disclosure may be extended to water and electric networks, as applicable, particularly as to selected portions of the present disclosure. 
     Further, while the present communications system is described as a network, other and additional communication forms including the use of mobile data collection apparatus may be employed within the scope of the present disclosure. Still further, while the present disclosure describes the use of a WAN to transmit information (either data or instructions) among selected devices, such is illustrative only as other information exchange apparatus may be used to provide desired communications including, but not limited to, WAN&#39;s, LAN&#39;s, all varieties of wireless systems, and the Internet, and intended to include other later developed technologies. 
     In accordance with present exemplary disclosure, information from such exemplary endpoints  110 ,  112 ,  114 , and  116  may be processed in the collectors  130  and sent over a WAN generally  140  to a head end system generally  150  by way of exemplary transmission paths  132 ,  142 . The head end system  150  may further process the endpoint reading or data and send that information to other systems. Long-term storage can, of course, be provided by, for example, a meter data management (MDM) system generally  154 , not presently illustrated in detail, and details of which form no particular aspect of the present subject matter. Such system  154  may also be considered as meter data management means associated with the head end or centralized data collection facility, for storing and processing data received via the telemetry system generally  100 . For telemetry, there may be other systems that are not part of an AMR/AMI network, such as engineering systems generally  156  that monitor distribution system pressure, or software systems generally  158  provided by the manufacturer of the correctors  112  or other components monitored by the endpoints. Other systems, not presently illustrated, may also be included in system  100 . Also, the representative endpoints  110 ,  112 ,  114 , and  116  are intended to be understood by those of ordinary skill in the art as representing any number of such endpoints in use in a given system configuration in accordance with present subject matter, variously and respectively associated with collectors as needed. 
     Endpoints  110 ,  112 ,  114 , and  116  “bubble-up” readings of the telemetry data periodically as needed for measurement resolution and network reliability. As described, for example, in U.S. Pat. No. 7,298,288 B2, assigned to the owner of the present technology, battery-powered endpoints have been designed to limit the power consumed in day-to-day operation. One known design feature is a bubble-up mode of operation, in which an endpoint “bubbles-up,” or activates its transceiver to communicate or attempt to communicate with the AMR data collection system, according, for example, to a preset schedule. The time duration or period between bubble-up events may typically span seconds or minutes. 
     Endpoints  110 ,  112 ,  114 , and  116  may also contain alarm thresholds. Per the present subject matter, when such thresholds are exceeded, the associated endpoint will initiate an alarm to relatively rapidly indicate an over/under threshold situation to the head end  150 . Such alarms may take the form of special messages and may be sent at a higher frequency than normal transmissions to ensure rapid and reliable delivery. Parameters stored in collectors  130  may also be changed through the use of two-way commands from the system head end  150  down to the collectors. 
     Collectors  130  validate the readings from the endpoints  110 ,  112 ,  114 , and  116  and prioritize the uploading of data to the head end  150 . Collectors  130  can also evaluate data from the endpoints  110 ,  112 ,  114 , and  116  and generate alarms as well, per the present subject matter. 
     At head end  150 , data is further validated, alarms may also be generated, and alarms and data are exported to an external system. Head end  150  can also accept requests from an external system (not presently illustrated) to send reconfiguration messages through the network to the endpoints  110 ,  112 ,  114 , and  116 , all per the present subject matter. 
     With reference now to  FIG. 2 , there is illustrated a representative block diagram overview of a portion of an exemplary Advanced Metering System (AMS) generally  200  including an associated handheld or mobile device  296  and such device&#39;s operational relationship with the AMS  200 . AMS  200  may include, without limitation, a Radio Relay or Cell Control Unit (CCU) generally  272  configured to communicate via internal radio circuitry (not separately illustrated) and a representative external antenna  274  with WAN  140  ( FIG. 1 ), which may correspond at least in part with RF LAN generally  262 . RF LAN  262  is configured to communicate by radio frequency transmissions with, inter alia, metrology device  242  by way of an associated endpoint device and associated antenna  244  (which together with related functionality may also be regarded as being utility metrology means). 
     Also illustrated in representative  FIG. 2  is a handheld or mobile device generally  296  that is configured per the present subject matter to perform multiple tasks including meter reading operations as well as instructional transmissions of commands by way of internal radio transmission circuitry (not separately illustrated) and a representative external antenna  298 . Handheld or mobile device  296  may also engage in the transmission of other relevant information to and from both metrology device  242  and WAN  140  ( FIG. 1 ) by way of RF LAN  262  and Radio Relay/CCU  272 . 
     In accordance with present safety-related technology, metrology device generally  242  ( FIG. 2 ) may be provided with a shut off valve  350 , as more fully illustrated in present  FIG. 3 . Referring now to  FIG. 3 , there is illustrated a gas metering system generally  300  including a metering device  342  that incorporates a disconnect valve  350  or  350 ′ (which may be thought of in other terms with related functionality as constituting disconnect means, associated with at least one of the utility metrology means and its associated endpoint device, for disconnecting a utility supply associated with the at least one utility metrology means at its respective location in response to a disconnect signal transmitted to the disconnect means). Further, those disconnect means associated with a gas supply system and having a valve associated with a gas pipeline may be understood as comprising disconnect valve means. In an exemplary embodiment, disconnect valve  350  may be incorporated generally inside metering device  342  so as to be inline with gas line  360 , which otherwise enters and exits metrology device  342  at inlet side  366  thereof and exit side  368  thereof, respectively. In an alternative embodiment, disconnect valve  350 ′ may be located on (or external to) metrology device  342  but still coupled inline with line  360  in order to selectively control gas supply to a consumer. Alternatively still, disconnect valve  350  may be associated with other non-metrology devices such as, but not limited to, a pressure regulator device. In all of such instances, all encompassed by the present subject matter, an endpoint communications device exemplarily represented by antenna generally  344  will be preferably associated with the valve or its hosting device in order to permit communications therewith in accordance with present technology. 
     Those of ordinary skill in the art will appreciate that communication from head end  150  may be by way of RF communications to an endpoint, for example general telemetry endpoint  116 , that may be associated with or incorporated into metrology device  342 , over a fixed network as generally illustrated in  FIG. 1 . Alternatively, communications may be provided in whole or in part by other communications methodologies including, but not limited to, all types of wired and wireless communications or combinations thereof, now or later existing. 
     More particularly in accordance with present safety-related technology, gas (or alternatively, fluid) flow sensors  362  and  364  may be incorporated within metrology device  342  or similar functionality at the input and output sides thereof, respectively, to monitor gas flow through metrology device  342 . Collectively, such related functionality may be thought of in other terms as comprising fluid flow sensor means, associated with at least one of such utility metrology means and its associated endpoint device, for sensing whenever the fluid flow rate at its respective location is outside of set parameters. In yet further alternative terms, such functionality and related may be thought of as comprising flow rate sensor means, associated with at least one of such utility metrology means and its associated endpoint device, for sensing whenever the gas flow rate at its respective location is outside of set parameters. 
     As previously noted, if the need arises to disconnect a gas utility customer at a particular location, be it for delinquency, location vacancy, or other reasons such as potential safety-related issues, such disconnection may be effected by way of a data collection device such as handheld or mobile device  296 . Further, in accordance with present technology, disconnection may be performed via handheld or mobile device  296  as part of the normal process of collecting (reading) data along a particular route. Similarly, and further in accordance with present technology, disconnection may be accomplished by transmission of disconnect instruction to a specific endpoint device associated with a particular meter and transmitted to such endpoint device by way of a fixed network metering system such as the Advanced Metering System generally  100  exemplarily illustrated in  FIG. 1  (or via some other form of network or communications technique, now or later existing). 
     Further in accordance with present technology, the ability of the present technology to initiate a disconnect operation by remote devices provides an opportunity to include further safety-related functionality within or associated with metrology device  342 . In accordance with present technology, such further functionality provides input gas flow sensor  362  and output gas flow sensor  364  that may be configured to communicate with onboard metrology components within metrology device  342  to monitor gas flow through such metrology device  342 . Such sensors  362 ,  364  may correspond to sensors generally used to monitor gas consumption and may be tied into the metrology board associated with metrology device  342  or its associated endpoint device as parts of the data collection mechanism that is configured to bubble up data on a periodic basis to, for example, collector  130  ( FIG. 1 ). 
     In accordance with one embodiment of the present technology, input sensor  362  may cooperate with output sensor  364  to monitor the gas flow rate through metrology device  342  such that output signals from both sensors  362 ,  364  may be compared to one or more predetermined threshold values to ascertain whether the flow rate has exceeded such predetermined threshold(s). Gas flow rates exceeding certain predetermined thresholds (either differentially between the two sensors, or absolutely at either of such sensors) may well be indicative of an unsafe operating condition such as, for example, a leak in gas line  360  passing through metrology device  342  or a break in the gas line downstream of metrology device  342 . In some instances, abnormally low flow rates may be regarded as indicative of a possible gas leakage upstream from metrology device  342 . 
     In accordance with present technology, advantage is taken of the ability to initiate closing of valve  350  by way of signal command that has been used previously to issue a valve open command either manually by way of gas company personnel operated handheld devices or by way of AMR system command from a remote location. In accordance with present disclosure, such valve opening functionality may be provided from within the metering device itself as such device self-monitors for gas flow rates exceeding predetermined threshold values, or as otherwise configured in accordance with the present disclosure. 
     In accordance with present subject matter, upon detection of a gas flow rate exceeding one or more predetermined values from either input sensor  362  and/or output sensor  364 , in certain present exemplary embodiments, a valve opening request may be initiated by the meter metrology circuitry itself (or by related circuitry located in or on-site associated with device  342 ) to assist in avoiding possible unsafe operating conditions. 
     Further, in accordance with present technology, a differential evaluation of gas flow rates as between input sensor  362  and output sensor  364  may be undertaken that may also result in initiation of a valve opening request. In the case of a differential reading as between input sensor  362  and output sensor  364  exceeding a predetermined value, such may be indicative of a leaky disconnect valve or accidental or intentional damage or tampering with the metrology device per se, or with the gas feed, such as improper diversion. In either case, per present safety-related subject matter, a valve closing request may be generated to address such potentially hazardous condition. 
     While the present subject matter has been described in detail with respect to specific embodiments thereof, it will be appreciated that those skilled in the art, upon attaining an understanding of the foregoing may readily produce alterations to, variations of, and equivalents to such embodiments. For example, the present subject matter may be equally applied to various fluid-based commodities, such as water and others, and not just limited to gas related systems. Accordingly, the scope of the present disclosure is by way of example rather than by way of limitation, and the subject disclosure does not preclude inclusion of such modifications, variations and/or additions to the present subject matter as would be readily apparent to one of ordinary skill in the art.