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A method and system for measuring the return air volume of a self-starting LNG dispenser
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A metering method and technology of a metering system, which is applied in the field of metering method and system of the self-starting return air volume of LNG dispensers, and can solve problems such as inconvenient
Active Publication Date: 2017-05-17
JEREH OIL & GAS ENG
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[0002] The gas filling and return gas metering of the traditional LNG gas filling machine is artificially operated to trigger the measurement of the electronic control system by operating the gas filling machine button. This method needs to be considered to be operated, which is not convenient enough
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Embodiment 1
[0020] Embodiment 1. A self-starting method for measuring the return air volume of an LNG dispenser. Combine below figure 1 with figure 2 The method provided in this embodiment will be described in detail.
[0021] see figure 1 , S101. When the gas dispenser is powered on and running, regularly collect the flow value of the gas dispenser back into the air gun.
[0022] S102. Comparing the collected current flow value F0 in the air return gun with the collected previous flow value F1.
[0023] Specifically, see figure 2 , When the customer's vehicle arrives at the LNG dispenser, when the dispenser is powered on, regardless of the state of the dispenser at this time, the return air gun of the dispenser can be directly inserted into the vehicle container to collect the return air volume. This embodiment provides a method for automatically measuring the amount of returned air, which collects the amount of returned air in the air gun at regular intervals, for example, collec...
Embodiment 2
[0030] Embodiment 2, a self-starting return air volume metering system for an LNG dispenser. Combine below image 3 The system provided in this embodiment will be described in detail.
[0031] see image 3 , the system provided in this embodiment includes a first acquisition module 301, a comparison module 302, a first start-up module 303, a first air return metering module 304, a second acquisition module 305, a second acquisition module 306 and a second air return metering module 307.
[0032] Wherein, the first collection module 301 is mainly used for collecting the flow value of the gas dispenser back into the air gun at regular intervals when the gas dispenser is powered on and running.
[0033] The comparing module 302 is mainly used to compare the collected current flow value F0 in the air return gun with the collected previous flow value F1.
[0034] Specifically, when the customer's vehicle arrives at the LNG dispenser, the air return gun of the dispenser is direc...
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Abstract
The invention discloses a method and a system for metering gas return amount on the basis of automatic start-up of LNG dispenser. The method comprises the following steps: when the dispenser is electrified to run, timely acquiring a flow value in a gas return gun of the dispenser; comparing the acquired current flow value F0 in the gas return gun with the last acquired flow value F1; when the difference Delta(F0) between the current flow value F0 and the last flow value F1 achieves a preset value Fs, starting a gas return amount metering flag, starting to meter the gas return amount, and taking the last flow value F1 as an initial flow value; when gas dispensing is finished, acquiring a flow value F when the gas dispensing is finished, then the gas return amount is the difference F-F1 between the flow value F when the gas dispensing is finished and the initial flow value F1. The method provided by the invention is capable of automatically starting up the dispenser to meter the air return amount in a vehicle-mounted container, and accurately metering the air return amount without the need of manually operating the dispenser.
Description
technical field [0001] The invention relates to the field of LNG dispensers, in particular to a method and system for measuring the return air volume of an LNG dispenser when it starts automatically. Background technique [0002] The gas filling and return gas metering of the traditional LNG gas filling machine is to manually operate the gas filling machine button to trigger the measurement of the electronic control system. This method needs to be operated and is not convenient enough. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a self-starting method and system for measuring the return air volume of an LNG dispenser, which can automatically start the dispenser to measure the return air volume in the vehicle-mounted container, and can Accurately meter the return air volume. [0004] The technical scheme that the present invention solves the problems of the technologies described above is as follows: [0005...
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