阅读说明：本技术 一种按流量计费的流体计费方法 (Fluid charging method for charging according to flow ) 是由 汤伟 成爽爽 冯波 于 2020-03-20 设计创作，主要内容包括：本发明公开了一种按流量计费的流体计费方法,涉及流体计量技术领域。使用压力传感器检测管道中流体的实时压力,根据实时压力确定管道中的流量,即使在高峰期多个管道分流导致压力变小,流体不能充满整个管道,采用本发明的计费器和计费方法对实际的总流量进行计算,计算较为准确。避免了原来计算总流量偏大的现象,按照流量计算的费用不会超出正常费用,用户正常支出费用,用户体验较好。(The invention discloses a fluid charging method for charging according to flow, and relates to the technical field of fluid metering. The real-time pressure of the fluid in the pipeline is detected by using the pressure sensor, the flow in the pipeline is determined according to the real-time pressure, and even if the pressure is reduced due to the diversion of a plurality of pipelines in a peak period and the fluid cannot fill the whole pipeline, the actual total flow is calculated by adopting the fee counter and the fee counting method, so that the calculation is more accurate. The phenomenon that the total flow is calculated to be larger originally is avoided, the cost calculated according to the flow cannot exceed the normal cost, the user normally expends the cost, and the user experience is better.)

1. A method for billing a fluid for a flow rate, the method comprising the steps of:

detecting the real-time pressure of the fluid in the pipeline;

comparing the real-time pressure with the standard pressure, and substituting the real-time pressure into a fault flow calculation formula Q-0.000007601P if the real-time pressure is less than the standard pressure but greater than the fault pressure²+0.002677 × P +0.03623 calculates the fluid flow Q in the fault state, where P in the formula represents pressure, and generates a pulse signal each time the calculated flow Q reaches the flow corresponding to a pulse, and calculates the total flow according to the number of pulse signals to calculate the cost.

2. The method of billing a fluid for a flow rate according to claim 1 wherein if the real-time pressure is greater than or equal to the standard pressure, the formula Q ═ pi · · s (D/2) is calculated according to the standard flow rate²V calculates the fluid flow under normal conditions, D in the formula represents the inner diameter of the pipeline, V represents the standard flow rate, a pulse is generated after the standard flow is reached, the total flow is determined according to the pulse amount, and the cost is calculated according to the set price.

3. The method for billing a fluid by flow rate according to claim 1 wherein if the real time pressure is less than or equal to the fault pressure, the billing is stopped.

Technical Field

The invention relates to the technical field of fluid metering, in particular to a fluid charging method for charging according to flow.

Background

In the process of fluid metering, the charging is generally carried out according to time or flow rate according to the fixed flow rate of the fluid in the pipeline. For example, showers in schools or businesses, generally use a meter that can be swiped with an IC card, but the pressure of hot water may be reduced due to the diversion of multiple hot water pipes during peak water usage periods.

If the mode of charging according to the flow rate is used, the general flow meter calculates the flow rate according to the fact that the pipeline is filled with the fluid, the flow rate of the fluid needs pulse signals to be accumulated, one pulse signal corresponds to a certain flow rate, and the pulse signals are accumulated in the system, so that the total flow rate of the fluid is calculated. However, during peak periods, when a plurality of pipelines are branched, the fluid cannot fill the whole pipeline (for example, the actual flow rate in the pipeline is only 2/3 or 3/4 of the standard flow rate), but the flow meter still calculates the flow rate according to the fact that the pipeline is filled with the fluid, so that the calculated flow rate is larger than the actual flow rate, the number of accumulated pulse signals is larger, the total calculated flow rate is larger, a user costs more, and the user experience is poorer.

Disclosure of Invention

The embodiment of the invention provides a fluid charging method for charging according to flow, which can solve the problems in the prior art.

The invention provides a fluid charging method based on flow charging, which comprises the following steps:

detecting the real-time pressure of the fluid in the pipeline;

comparing the real-time pressure with the standard pressure, and substituting the real-time pressure into a fault flow calculation formula Q-0.000007601P if the real-time pressure is less than the standard pressure but greater than the fault pressure²+0.002677 × P +0.03623 calculates the fluid flow Q in the fault state, where P in the formula represents pressure, and generates a pulse signal each time the calculated flow Q reaches the flow corresponding to a pulse, and calculates the total flow according to the number of pulse signals to calculate the cost.

The fluid charging method based on the flow rate of the invention can calculate the actual total flow rate more accurately by adopting the charger of the invention even if the pressure is reduced due to the shunting of a plurality of pipelines in the peak period and the fluid can not fill the whole pipeline. The phenomenon that the total flow is calculated to be larger originally is avoided, the cost calculated according to the flow cannot exceed the normal cost, the user normally expends the cost, and the user experience is better.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a graph of the pressure versus flow curve obtained by the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a fluid fee counter for charging according to flow, which comprises a pressure sensor, a flowmeter and a fee counter, wherein the pressure sensor is arranged at the position, close to an outlet, of the inner wall of a pipeline and used for detecting the real-time pressure of fluid in the pipeline, the flowmeter calculates the real-time flow according to the real-time pressure, and the fee counter calculates the fee according to the real-time flow.

After receiving the data of the real-time pressure, the flowmeter compares the real-time pressure with a set standard pressure to judge whether the pressure in the pipeline is normal or not, and if the real-time pressure is greater than or equal to the standard pressure, the flowmeter calculates a formula Q (pi-) (D/2) according to a standard flow²V calculating the fluid flow under normal conditions, Q in the formula representing the flow in m³And/s, D represents the inner diameter of the pipeline, and the unit is m, and V represents the standard flow velocity and the unit is m/s. And generating a pulse after each standard flow is reached, determining the total flow by the flowmeter according to the pulse amount, and calculating the cost by the charger according to the set price.

If the real-time pressure is less than the reference pressure but greater than the fault pressure, the flow meter substitutes the real-time pressure into the fault flow calculation formula Q-0.000007601P²+0.002677 × P +0.03623 calculates the fluid flow Q in the fault state, where P represents the pressure in KPa. The flowmeter generates a pulse (for example) whenever the calculated flow rate Q reaches a flow rate corresponding to a pulseIf the price of the fluid flow Q corresponding to one pulse is 1 minute), finally, the flowmeter calculates the total flow according to the number of the pulses, and the charger calculates the cost according to the total flow. In this embodiment, the fault flow calculation formula is obtained by fitting data of multiple experiments, a curve corresponding to the formula is shown in fig. 1, a pipeline selected in the experiments is a DN20 steel pipe, and the inner diameter is 21 mm. Since the fluid pressure in the fault state is lower than the standard pressure, the time interval between two adjacent pulses is longer than that in the normal state, the number of pulses is smaller overall, and the calculated total flow rate is more accurate.

If the real-time pressure is less than or equal to the fault pressure, the meter stops the charging.

Based on the fluid fee counter, the invention also provides a fluid fee counting method based on flow rate, which comprises the following steps:

detecting the real-time pressure of the fluid in the pipeline;

comparing the real-time pressure with the standard pressure, if the real-time pressure is greater than or equal to the standard pressure, calculating the formula Q ═ pi · according to the standard flow (D/2)²V, calculating the fluid flow under normal conditions, generating a pulse after the fluid flow reaches a standard flow, determining the total flow according to the pulse amount, and calculating the cost according to the set price;

if the real-time pressure is less than the standard pressure but greater than the fault pressure, the real-time pressure is substituted into the fault flow calculation formula Q-0.000007601P²+0.002677 × P +0.03623 calculates the fluid flow Q in the fault state, generates a pulse each time the calculated flow Q reaches the flow corresponding to a pulse, calculates the total flow according to the number of pulses and calculates the cost;

if the real-time pressure is less than or equal to the fault pressure, the billing is stopped.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.