A shunt wire connector on-off state detector and a detection method

Abstract

The application provides a shunt wire connector on-off state detector and a detection method, and relates to the technical field of live working protection of power transmission lines. The detector comprises a live working shielding suit shunt wire, an on-off state detector main body and a ring hoop tightening mechanism. The on-off state detector main body is used for detecting and processing the on-off state signal of the live working shielding suit shunt wire, and according to the processing result, it is judged whether to execute an alarm. The ring hoop tightening mechanism is used for fixing the on-off state detector main body and the live working shielding suit shunt wire, and realizing the electrical connection between the on-off state detector main body and the live working shielding suit shunt wire. The technical scheme of the application detects the on-off state and the disconnection position of the shunt wire connector of the live working shielding suit in real time, improves the safety, and ensures that the on-off state does not significantly affect the conductive performance of the shielding suit.

Description

Technical Field

[0001] This application relates to the field of protection technology for live working on transmission lines, and in particular to a detector and detection method for the continuity status of a shunt conductor connector. Background Technology

[0002] When performing maintenance work on high-voltage transmission lines (AC 110kV~1000kV, DC ±125kV~±1100kV), personnel must wear protective clothing. Utilizing the Ferrari cage principle, this clothing creates an equipotential shield around the body surface exposed to the high-voltage electric field, protecting the body from the harmful effects of the electric field and electromagnetic waves. The seams of the clothing, including the top, trousers, gloves, and socks, are equipped with flexible metal wire conductors to carry the main current path within the garment. After donning the protective clothing, the conductors must be connected via connectors to integrate all components, achieving both voltage equalization and current shunting.

[0003] The shunt wire connector of a live-line working protective suit consists of a left terminal, a right terminal, a connecting cap, and a compression spring. Through the compression of the compression spring and the locking mechanism of the stop groove and the locking pin, the left and right terminals are kept in contact with each other, achieving electrical connection between the various components of the protective suit. However, because the internal compression spring of the shunt wire connector is prone to fatigue and deformation, and its elasticity weakens, the connection to the shunt wire is rigid. The movements of workers climbing poles naturally cause the shunt wire to stretch and contract, resulting in repeated twisting of the connector between the various components of the protective suit. This can cause the left and right terminals to loosen or even detach completely, affecting the current conduction performance within the protective suit. Since this disconnection is difficult to detect, it can lead to arcing and burns to workers during operations and when moving in and out of positions, posing a significant safety hazard.

[0004] In existing technologies, there are two solutions to this problem. Chinese patent CN210640395U relates to a shunt wire connector for live-line work protective clothing. It designs a more robust and reliable shunt wire connector for live-line work protective clothing. However, robustness and ease of disassembly are often difficult to balance. A more complex structural design for the shunt wire connector may make it less likely to fall off, but it will also make it more difficult and time-consuming for workers to put on and take off, reducing work efficiency. In addition, if the shunt wire connector of this structure breaks during operation, it cannot effectively warn the workers.

[0005] Chinese patent CN113142702A relates to a protective suit for live-line work on overhead transmission lines. It involves designing a large-loop shunt conductor path within the protective suit and detecting the continuity of the shunt conductor connections using resistance measurement. However, this solution requires rewiring the shunt conductors within the protective suit to improve the accuracy of low-resistance measurements. Furthermore, this solution can only detect two states: continuity and disconnection of the protective suit as a whole. It is insufficient to identify the location of disconnected shunt conductor connections within the protective suit, and therefore cannot provide timely feedback to workers requiring emergency intervention. Summary of the Invention

[0006] The purpose of this invention is to solve the problems of inaccurate detection location and inconvenience in existing methods for detecting the continuity status of shunt wires in live-line shielding suits, and to provide a detector and method for detecting the continuity status of shunt wire connectors.

[0007] The above-mentioned objective of this application is achieved through the following technical solution:

[0008] The detector includes: a shunt wire 2 for the live-line work shielding suit, a main body 1 for the on / off status detector, and a ring clamping mechanism 18;

[0009] The shunt wire 2 for live-line work shielding suit includes: a first shunt wire connector 13 for live-line work shielding suit and a second shunt wire connector 12 for live-line work shielding suit;

[0010] The main body 1 of the continuity status detector is used to detect and process the continuity status signal of the shunt wire 2 of the live working shielding suit, and determine whether to execute an alarm based on the processing result;

[0011] The ring clamping mechanism 18 is used to fix the on / off status detector body 1 to the shunt wire 2 of the live working shielding suit, thereby realizing the electrical connection between the on / off status detector body 1 and the shunt wire 2 of the live working shielding suit.

[0012] Optionally, the on / off state detector body 1 includes: a plastic upper cover 3 and a plastic lower cover 5;

[0013] The plastic cover 3 is equipped with an indicator light 4, which is used to display the power-on status and power level.

[0014] The plastic lower cover 5 is provided with a power button (6) and a charging interface 7; the bottom of the plastic lower cover 5 is provided with an annular clamping mechanism.

[0015] Optionally, a miniature electromagnet 9 is provided under the plastic cover 3 of the on / off state detector body 1, a lithium battery 10 is provided on the side of the miniature electromagnet 9, and a PCBA circuit board 15 is provided under the lithium battery 10.

[0016] The lower layer of the PCBA circuit board is provided with a contact board 11, which is used to control the contact rebound protection mechanism. The lower layer of the contact board 11 is a plastic lower cover 5.

[0017] A spring 16 is provided below the contact plate 11; the spring 16 is connected to the metal contact.

[0018] The miniature electromagnet 9 is used to control the vertical movement of the contact plate 11 by magnetic force.

[0019] Optionally, the PCBA circuit board includes: a contact rebound protection mechanism, an alarm module, a power supply module, an on / off state judgment module, and a signal processing module;

[0020] The signal processing module is electrically connected to the on / off state judgment module, the contact rebound protection mechanism, and the alarm module.

[0021] The alarm module includes: a buzzer and indicator lights;

[0022] The on / off status judgment module is used to obtain the on / off status signal between the shunt conductor of the live-line working shielding suit and the ring clamping mechanism;

[0023] The signal processing module is used to process on / off status signals and generate control commands;

[0024] The alarm module is used to control the buzzer and indicator lights to sound an alarm according to control commands;

[0025] The contact springback protection mechanism is used to retract the metal contacts according to control commands;

[0026] The power module is used to provide power to various electronic components.

[0027] Optionally, the continuity / short circuit determination module uses an IC open / short circuit tester.

[0028] Optionally, the power module adopts a Type-C charging module.

[0029] Optionally, the annular clamping mechanism 18 includes: a rotating shaft 17, a connecting seat 8, and a ring buckle 14;

[0030] The connecting seat 8 and the ring buckle 14 are connected by a rotating shaft 17;

[0031] The connecting seat 8 is provided with an annular clamping groove for attaching tightly to the outer surfaces of the first live-line work shielding suit shunt wire connector (13) and the second live-line work shielding suit shunt wire connector (12).

[0032] The inner wall of the annular clamping groove of the annular clamping mechanism 18 has two circular openings for the extension and retraction of the two metal contacts on the contact springback protection mechanism.

[0033] A method for detecting the continuity status of a shunt wire connector, the method comprising:

[0034] Acquire the continuity status signals between the shunt conductors of the live-line working shielding suit; the continuity status signals include: the continuity status signal between the left sleeve of the shielding suit jacket and the left glove, the continuity status signal between the right sleeve of the shielding suit jacket and the right glove, the continuity status signal between the left lower hem of the shielding suit jacket and the left waistband, the continuity status signal between the right lower hem of the shielding suit jacket and the right waistband, the continuity status signal between the left pant leg of the shielding suit and the left sock, and the continuity status signal between the right pant leg of the shielding suit and the right sock;

[0035] Process each on / off status signal to generate an alarm signal;

[0036] The alarm signal controls the on / off status detector of the corresponding shunt wire connector of the live-line working shielding suit to issue an alarm, thereby realizing the on / off warning of the shunt wire of the live-line working shielding suit.

[0037] A computer-readable storage medium storing instructions that, when executed, perform a shunt wire connector continuity status detector.

[0038] The beneficial effects of the technical solution provided in this application are:

[0039] 1. The present invention provides a detector for the continuity status of shunt wire connectors on live-line working protective suits, which can directly monitor the connection status of each shunt wire connector on the live-line working protective suit. When workers enter or exit equipotential and live-line work areas, the detector can promptly alert them to the disconnection status of the shunt wire connectors through an alarm module. This allows workers to quickly identify the disconnection location of the shunt wire connectors inside the protective suit, shortens the time workers spend checking the status of the live-line working protective suit, and prevents workers from being burned due to arc discharge between different parts of the protective suit.

[0040] 2. The contact rebound protection mechanism in this invention can ensure that the conductivity of the shielding suit is not significantly affected regardless of the on / off state, thus taking into account both the on / off state monitoring function of the shunt wire connector and the safety protection function of the overall quality of the shielding suit.

[0041] 3. The invention has a simple and compact overall structure, is easy to install and disassemble, does not affect the normal live-line operation of personnel wearing shielding suits, can be charged by magnetic attraction, has a high waterproof rating, and is highly maintainable. Attached Figure Description

[0042] The present application will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0043] Figure 1 This is a schematic diagram of the structure in an embodiment of this application;

[0044] Figure 2 This is an assembly drawing from an embodiment of this application;

[0045] Figure 3 This is a schematic diagram of the contact rebound protection mechanism in the embodiments of this application;

[0046] Figure 4 This is a schematic diagram of the annular clamping mechanism in the embodiments of this application;

[0047] Figure 5 This is a circuit diagram of open / short circuit detection in an embodiment of this application. Detailed Implementation

[0048] To provide a clearer understanding of the technical features, objectives, and effects of this application, the specific embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0049] Embodiments of this application provide a shunt wire connector continuity status detector.

[0050] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a shunt wire connector continuity status detector according to an embodiment of this application, including:

[0051] The live-line working shielding suit includes a shunt wire 2, a continuity status detector body 1, and a ring clamping mechanism 18.

[0052] The shunt wire 2 for live-line work shielding suit includes: a first shunt wire connector 13 for live-line work shielding suit and a second shunt wire connector 12 for live-line work shielding suit;

[0053] The main body 1 of the continuity status detector is used to detect and process the continuity status signal of the shunt wire 2 of the live working shielding suit, and determine whether to execute an alarm based on the processing result;

[0054] The ring clamping mechanism 18 is used to fix the on / off status detector body 1 to the shunt wire 2 of the live working shielding suit, thereby realizing the electrical connection between the on / off status detector body 1 and the shunt wire 2 of the live working shielding suit.

[0055] The on / off state detector body 1 includes: a plastic upper cover 3 and a plastic lower cover 5;

[0056] The plastic cover 3 is equipped with an indicator light 4, which is used to display the power-on status and power level.

[0057] The plastic lower cover 5 is equipped with a power button 6 and a charging interface 7; the bottom of the plastic lower cover 5 is equipped with an annular clamping mechanism.

[0058] The plastic cover 3 of the on / off state detector body 1 is provided with a miniature electromagnet 9, a lithium battery 10 is provided on the side of the miniature electromagnet 9, and a PCBA circuit board 15 is provided on the lower layer of the lithium battery 10.

[0059] The lower layer of the PCBA circuit board is provided with a contact board 11, which is used to control the contact rebound protection mechanism. The lower layer of the contact board 11 is a plastic lower cover 5.

[0060] A spring 16 is provided below the contact plate 11; the spring 16 is connected to the metal contact.

[0061] The miniature electromagnet 9 is used to control the vertical movement of the contact plate 11 by magnetic force.

[0062] This application provides an embodiment as follows: a contact rebound protection mechanism in the main body of a continuity / disconnection status detector includes two metal contacts, an electromagnet, and a connecting wire assembly. When the two terminals of the shunt wire connector are disconnected, the two metal contacts connected to the terminals retract, disconnecting the connection path between the connector continuity / disconnection status judgment module and the shielding suit. This prevents the internal resistance of the connector continuity / disconnection status judgment module from being connected in series with the shielding suit, thereby affecting the shunt conductivity of the shielding suit and protecting the workers. The components within the continuity / disconnection status detector main body, their arrangement order, and their interrelationships are as follows: Figure 2 As shown.

[0063] This application provides an embodiment as follows, in conjunction with... Figure 3 The on / off state detector body is equipped with a contact springback protection mechanism. This mechanism includes a miniature electromagnet used to magnetically control the vertical movement of a small contact plate. Two springs are located below the small contact plate, which resets to protect the shielding suit when the connector is disconnected. After the two terminals of the shunt wire connector are connected, inserting the connected terminals into the annular clamping mechanism and energizing it triggers the electromagnet, pushing the small contact plate outwards and pressing the springs, causing the contacts to move outwards until the two metal contacts touch the outer surface of the shunt wire connector. Once the circuit is open and power is off, the electromagnet resets and retracts, the springs assist the small contact plate in resetting and returning it to its original position, and the two metal contacts retract into the internal connector housing.

[0064] The PCBA circuit board includes: a contact rebound protection mechanism, an alarm module, a power supply module, an on / off state judgment module, and a signal processing module;

[0065] The signal processing module is electrically connected to the on / off state judgment module, the contact rebound protection mechanism, and the alarm module.

[0066] The alarm module includes: a buzzer and indicator lights;

[0067] The on / off status judgment module is used to obtain the on / off status signal between the shunt conductor of the live-line working shielding suit and the ring clamping mechanism;

[0068] The signal processing module is used to process on / off status signals and generate control commands;

[0069] The alarm module is used to control the buzzer and indicator lights to sound an alarm according to control commands;

[0070] The contact springback protection mechanism is used to retract the metal contacts according to control commands;

[0071] The power module is used to provide power to various electronic components.

[0072] This application provides an embodiment as follows: a signal processing module is used to process the on / off status signal of the shunt wire connector detected by the connector on / off status judgment module, and to control the contact retraction signal and alarm signal of the contact rebound protection mechanism.

[0073] This application provides an embodiment as follows: the alarm module consists of a buzzer alarm and a dual-color LED light, used to emit a buzzer alarm sound and display the LED status light when the two terminals of the shunt wire connector are disconnected, to remind the operator.

[0074] The continuity / disconnection status determination module uses an IC open / short circuit tester.

[0075] This application provides an embodiment as follows: the IC open / short circuit tester is connected to two metal contacts via a metal connecting wire and a contact springback protection mechanism 3. The IC open / short circuit tester can determine the open circuit state based on the forward voltage drop of the anti-static protection diode at the circuit pin, and is used to monitor the connection status of the shunt wire connector in terms of electrical performance.

[0076] This application provides an embodiment as follows, in conjunction with... Figure 5 The circuit of the continuity / short-circuit judgment module adopts the IC open / short-circuit static test method, which judges the continuity status of the shunt wire connection based on the forward voltage drop of the ESD protection diode.

[0077] The power module uses a Type-C charging module.

[0078] The ring clamping mechanism 18 includes: a rotating shaft 17, a connecting seat 8, and a ring buckle 14;

[0079] The connecting seat 8 and the ring buckle 14 are connected by a rotating shaft 17;

[0080] The connecting seat 8 is provided with an annular clamping groove for attaching tightly to the outer surfaces of the first live-line work shielding suit shunt wire connector 13 and the second live-line work shielding suit shunt wire connector 12.

[0081] The inner wall of the annular clamping groove of the annular clamping mechanism 18 has two circular openings for the extension and retraction of the two metal contacts on the contact springback protection mechanism.

[0082] This application provides an embodiment as follows, in conjunction with... Figure 4 The annular clamping mechanism features an opening and closing ring and a connecting seat, facilitating assembly and disassembly with the shunt wire connector under test. The inner wall of the annular clamping mechanism has two circular openings, through which two metal contacts of the contact springback protection mechanism can extend and retract. During monitoring, the two metal contacts can directly make electrical contact with the two terminals of the shunt wire connector under test. When a disconnection from the two terminals of the shunt wire connector is detected, the signal processing module sends a retraction command to the contact springback protection mechanism, controlling the electromagnet to retract the two metal contacts towards the electromagnet.

[0083] A method for detecting the continuity status of a shunt wire connector, the method comprising:

[0084] Acquire the continuity status signals between the shunt conductors of the live-line working shielding suit; the continuity status signals include: the continuity status signal between the left sleeve of the shielding suit jacket and the left glove, the continuity status signal between the right sleeve of the shielding suit jacket and the right glove, the continuity status signal between the left lower hem of the shielding suit jacket and the left waistband, the continuity status signal between the right lower hem of the shielding suit jacket and the right waistband, the continuity status signal between the left pant leg of the shielding suit and the left sock, and the continuity status signal between the right pant leg of the shielding suit and the right sock;

[0085] Process each on / off status signal to generate an alarm signal;

[0086] The alarm signal controls the on / off status detector of the corresponding shunt wire connector of the live-line working shielding suit to issue an alarm, thereby realizing the on / off warning of the shunt wire of the live-line working shielding suit.

[0087] This application provides an embodiment as follows: the provided live-line working protective suit shunt wire connector continuity status detector is a distributed detection device. A total of six shunt wire connector continuity status detectors are deployed on a single-piece live-line working protective suit, located at the two wrists, two waists, and two ankles. Each shunt wire connector continuity status detector clamps the shunt wire connector at its location via a ring-shaped clamping mechanism.

[0088] In practice, first check the front of the electrified shielding suit for damage, ensuring all conductive connectors and seams are undamaged, and guaranteeing the shielding efficiency meets standards. Wear the shielding suit in the correct order, ensuring the top, pants, hat, gloves, and shoes are correctly connected to form a complete shielding system. Connect the shunt wire connector continuity status detector of this invention to each shunt wire connector on the shielding suit. Specifically, rotate the two terminals of the shunt wire connector; under the action of the compression spring, the left and right terminals are electrically connected and fixed through the cooperation of the stop groove and the locking pin. Place the opening and closing ring on the continuity status detector onto the two terminals, and apply force to insert the buckle into the buckle seat to ensure a secure connection. During operation, continuously monitor the buzzer alarm of the continuity status detector; if any abnormality is detected, take immediate action and reconnect the corresponding shunt wire connector. After the operation is completed, check the status of the shielding suit and monitoring device again to ensure that there is no damage. Apply force to remove the buckle of the openable ring on the continuity status detector from the buckle seat. Disassemble the continuity status detector of each shunt wire connector on the shielding suit. Charge the device with a magnetic charger. After it is fully charged, store it properly for the next use.

[0089] Working principle: Detector for continuity of shunt wire connector in live-line working protective suit

[0090] The two metal contacts of the contact rebound protection mechanism are electrically connected to the left and right ends of the shunt wire connector at its location. When the shunt wire connector is inserted into the annular clamping mechanism, energizing it triggers an electromagnet, which pushes the contact plate outwards, compressing a spring and causing the contacts to move outwards until the two metal contacts extend and contact the shunt wire connector. At this point, a local conductive loop is formed with the connector continuity status judgment module. When the left and right ends of the shunt wire connector disconnect, this conductive loop becomes an open circuit. This state is quickly identified by the connector continuity status judgment module of the shunt wire connector continuity status detector, which then sends the open circuit signal to the signal processing module. The signal processing module controls the alarm module to emit a buzzer alarm, assisting the operator in quickly reconnecting the disconnected terminals and preventing burns from arc discharge between different parts of the protective suit. Simultaneously, the detector controls the electromagnet of the contact rebound protection mechanism to de-energize, the electromagnet retracts, the spring assists in resetting, the contact plate returns, and the two metal contacts retract towards the inner wall of the annular clamping groove of the annular clamping structure, disconnecting the electrical connection between the on / off status detector of the shunt wire connector and the two terminals of the shielding suit shunt wire connector, thus preventing its internal resistance from being connected in series into the shielding suit, thereby affecting the conductivity of the shielding suit.

[0091] This application also discloses a computer-readable storage medium storing a plurality of instructions adapted for loading by a processor to execute the above-described shunt wire connector continuity status detector.

[0092] The above are merely exemplary embodiments of this disclosure and should not be construed as limiting the scope of this disclosure. Any equivalent changes and modifications made in accordance with the teachings of this disclosure shall still fall within the scope of this disclosure.

[0093] This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not described in this disclosure. The specification and embodiments are to be considered exemplary only, and the scope and spirit of this disclosure are defined by the claims.

Claims

1. A detector for the continuity status of a shunt wire connector, characterized in that, The detector includes: a shunt wire for the live-line work shielding suit (2), a main body for the on / off status detector (1), and a ring clamping mechanism (18); The live-line working shielding suit shunt wire (2) includes: a first live-line working shielding suit shunt wire connector (13) and a second live-line working shielding suit shunt wire connector (12); The main body (1) of the on / off status detector is used to detect and process the on / off status signal of the shunt wire (2) of the live working shielding suit, and to determine whether to execute an alarm based on the processing result; The plastic cover (3) of the on / off state detector body (1) is provided with a miniature electromagnet (9) below it, a lithium battery (10) is provided on the side of the miniature electromagnet (9), and a PCBA circuit board (15) is provided on the lower layer of the lithium battery (10). The lower layer of the PCBA circuit board is provided with a contact board (11), which is used to control the contact rebound protection mechanism. The lower layer of the contact board (11) is a plastic lower cover (5). A spring (16) is provided below the contact plate (11); the spring (16) is connected to the metal contact. A miniature electromagnet (9) is used to control the vertical movement of a contact plate (11) by magnetic force; The PCBA circuit board includes: a continuity / short circuit determination module; the continuity / short circuit determination module uses an IC open / short circuit tester. The ring clamping mechanism (18) is used to fix the on / off status detector body (1) and the shunt wire (2) of the live working shielding suit, so as to realize the electrical connection between the on / off status detector body (1) and the shunt wire (2) of the live working shielding suit.

2. The continuity / disconnection status detector for a shunt wire connector as described in claim 1, characterized in that, The on / off state detector body (1) includes: a plastic upper cover (3) and a plastic lower cover (5); The plastic cover (3) is provided with an indicator light (4), which is used to display the power-on status and power level; The plastic lower cover (5) is provided with a power button (6) and a charging interface (7); the bottom of the plastic lower cover (5) is provided with an annular clamping mechanism.

3. A shunt wire connector continuity status detector as described in claim 2, characterized in that, The PCBA circuit board includes: a contact rebound protection mechanism, an alarm module, a power supply module, an on / off state judgment module, and a signal processing module; The signal processing module is electrically connected to the on / off state judgment module, the contact rebound protection mechanism, and the alarm module. The alarm module includes: a buzzer and indicator lights; The on / off status judgment module is used to obtain the on / off status signal between the shunt conductor of the live-line working shielding suit and the ring clamping mechanism; The signal processing module is used to process on / off status signals and generate control commands; The alarm module is used to control the buzzer and indicator lights to sound an alarm according to control commands; The contact springback protection mechanism is used to retract the metal contacts according to control commands; The power module is used to provide power to various electronic components.

4. A shunt wire connector continuity status detector as described in claim 3, characterized in that, The power module uses a Type-C charging module.

5. A shunt wire connector continuity status detector as described in claim 1, characterized in that, The ring clamping mechanism (18) includes: a rotating shaft (17), a connecting seat (8), and a ring buckle (14); The connecting seat (8) and the ring (14) are connected by a rotating shaft (17); The connector (8) is provided with an annular clamping groove for attaching tightly to the outer surfaces of the first live-line work shielding suit shunt wire connector (13) and the second live-line work shielding suit shunt wire connector (12). The inner wall of the annular clamping groove of the annular clamping mechanism (18) has two circular openings for the extension and retraction of the two metal contacts on the contact springback protection mechanism.

6. A method for detecting the continuity status of a shunt wire connector, implemented based on a shunt wire connector continuity status detector as described in any one of claims 1-5, characterized in that, The method includes: Acquire the continuity status signals between the shunt conductors of the live-line working shielding suit; the continuity status signals include: the continuity status signal between the left sleeve of the shielding suit jacket and the left glove, the continuity status signal between the right sleeve of the shielding suit jacket and the right glove, the continuity status signal between the left lower hem of the shielding suit jacket and the left waistband, the continuity status signal between the right lower hem of the shielding suit jacket and the right waistband, the continuity status signal between the left pant leg of the shielding suit and the left sock, and the continuity status signal between the right pant leg of the shielding suit and the right sock; Process each on / off status signal to generate an alarm signal; The alarm signal controls the on / off status detector of the corresponding shunt wire connector of the live-line working shielding suit to issue an alarm, thereby realizing the on / off warning of the shunt wire of the live-line working shielding suit.

7. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores instructions that, when executed by a computer, perform the method as described in claim 6.

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