TW201307810A - High-pressure gas stock detection method and apparatus thereof - Google Patents

Abstract

The creation provides a high-pressure gas stock detection method and an apparatus thereof, which are used for detecting gas stock in a fixed container. Compared to prior arts, the creation has the advantages of easy implementation and assembly, high precision, not being influenced by the container shape, allowing remote monitoring, adjustable to different gas features, and low costs.

Description

High-pressure gas inventory detecting method and device thereof

This creation is related to the method of measuring the gas inventory of fixed containers. This creation is a method for detecting high-pressure gas inventory and its device.

The method generally used for measuring the gas or high pressure gas inventory of a fixed capacity can be divided into two types: direct measurement and indirect estimation. The direct measurement method can distinguish the following types: weighing measurement method, pressure gauge pressure measurement method, flow meter algorithm, etc.; indirect push algorithm mostly uses the number of quantitative release calculations to obtain the stock status.

The weighing method is a relative accuracy method. It mainly uses the weight of the storage container and the weight of the compressed gas to measure the stock. The main problem of this method is that the volumetric weight of the object to be tested is larger. The larger the body of the weighing detection, the higher the measurement cost is. In general, it is the more expensive method of all measurement methods; the storage containers are processed differently, to different weights, or The difference in the amount of filling gas is also the reason for its inaccurate measurement.

The pressure gauge pressure measurement method is mainly used to measure the gas pressure value in the storage container to obtain the state value of the stock, which is one of the commonly used and accurate methods for measuring the compressed gas inventory. However, purely mechanical pressure gauges are only suitable for on-site monitoring and cannot be monitored remotely; if an electronic pressure gauge is used, the cost of installation and fixing will be another unsatisfactory expense.

The flowmeter algorithm uses a flow sensor to measure the capacity of the high-pressure gas. It is suitable for the control of the output gas. It is applied to the measurement of compressed gas inventory with a fixed capacity. The main problems and shortcomings are the same as those of the pressure gauge. The cost is high, the assembly of non-standard products is not easy, and additional costs are required. The method of indirect estimation to obtain the high-pressure gas inventory has the most unstable deviation value, which is limited by the manufacturing tolerances of the compressed gas container, the inconsistency of the filling gas quantity, and the non-quantitative output of the ejecting. The conversion of the measured usage times and the stock is only For reference, most of them are only applicable to inexpensive aromatic sprayers. If the temporary replacement is used, the state of the stock cannot be obtained at all.

In view of the above-mentioned shortcomings of the prior art, the present invention provides a high-pressure gas inventory detecting method and a device thereof for measuring the gas inventory in a fixed container, which is easy to manufacture and assemble, and has high precision compared to the prior art. It is not affected by the appearance of the gas storage container, can be remotely monitored, and can adapt to different gas characteristics and low cost.

The present invention provides a high-pressure gas inventory detecting method for measuring the gas inventory value of a gas storage container, the steps of which are: respectively measuring the ejecting end of the gas storage container and the surrounding environment at the first time point and a temperature difference at a second time point; subtracting a temperature difference between the second time point and a temperature difference value at the first time point; dividing the obtained value by a time difference value between the first time point and the second time point; obtaining a gas Stock value.

The creation system provides a high-pressure gas inventory detecting device, which calculates the stock by the cooling effect generated by the high-pressure gas eruption diffusion, and measures the temperature of the front end of the gas-storing container and the ambient temperature of the container by two temperature sensors respectively. To obtain the gas inventory value in the container.

The above summary and the following detailed description and drawings are intended to further illustrate the manner, means and effects of the present invention in achieving its intended purpose. Other purposes and advantages of this creation will be set forth in the following description and illustration.

The embodiments of the present invention are described below by way of specific specific examples, and those skilled in the art can readily appreciate the other advantages and effects of the present invention from the disclosure herein.

The high pressure gas inventory detection method of the present invention is for measuring the gas inventory of a gas storage container, and the steps are as follows:

(A) measuring the temperature of the ejecting port end of the gas storage container and the surrounding environment;

(B) separately measuring the temperature difference between the first time point and the second time point of the gas discharge port end and the surrounding environment, and subtracting the temperature difference between the second time point and the first time point Then, the obtained value is divided by the time difference between the first time point and the second time point, and finally a gas inventory value is obtained, and the calculation formula is as follows:

X(t ₂ )=T _P (t ₂ )−T _F (t ₂ ), X(t ₁ )=T _P (t ₁ )−T _F (t ₁ ), Slop=[X(t ₂ )−X (t ₁ )]/(t ₂ -t ₁ )

T _F is the temperature at the mouth of the ejecting port, and T _R is the reference value of the ambient temperature. The first time point is t ₁ when the compressed gas is ejected, and the second time point is t ₂ after the ejecting of the compressed gas, and X(t ₁ ) is the temperature at the end of the ejecting port. The temperature difference measured with the ambient temperature reference value at time t ₁ when the compressed gas is ejected, and X(t ₂ ) is the temperature difference measured between the temperature at the end of the ejecting port and the reference value of the ambient temperature at time t ₂ after the ejecting of the compressed gas. The time difference between X(t ₁ ) and X(t ₂ ) is t ₂ -t ₁ second, Slop is the slope value after two points of X(t ₁ ) and X(t ₂ ), and Slop is gas. The value of the stock, which ranges from 0 to 1; (C) the output gas stock value signal.

1 is a schematic structural view of the high-pressure gas inventory detecting device of the present invention. As shown in the figure, the device is used for measuring the gas inventory of a gas storage container, and the structure thereof comprises: a first sensing unit 1: for use The second sensing unit 2 is configured to measure the temperature of the surrounding environment; the computing unit 3: the computing unit is provided with an analog-to-digital conversion signal component, the unit is Receiving the temperature values of the first sensing unit and the second sensing unit, and outputting the gas inventory value signal after the operation.

The calculation method of the gas inventory value is: separately measuring the temperature difference between the ejecting end of the gas storage container and the surrounding environment after the ejecting of the compressed gas and the ejecting of the compressed gas, and subtracting the values of the two temperature differences, and then obtaining the obtained The value is output by dividing the value by the time difference between the compressed gas eruption and the compressed gas after the eruption.

The above-described embodiments are merely illustrative of the features and functions of the present invention, and are not intended to limit the scope of the technical content of the present invention. Any person skilled in the art can modify and change the above embodiments without departing from the spirit and scope of the present invention. Therefore, the scope of protection of this creation should be as listed in the scope of the patent application described later.

1. . . First sensing unit

2. . . Second sensing unit

3. . . Computing unit

FIG. 1 is a schematic structural view of the high pressure gas inventory detecting device of the present invention.

1. . . First sensing unit

2. . . Second sensing unit

3. . . Computing unit

Claims (6)

A high-pressure gas inventory detecting method is used for measuring a gas inventory value of a gas storage container, the steps of which are: respectively measuring a gas storage container ejection end and a surrounding environment at a first time point and a second time point The temperature difference is obtained by subtracting the temperature difference between the second time point and the temperature difference of the first time point; dividing the obtained value by the time difference between the first time point and the second time point; obtaining a gas inventory value. The high-pressure gas inventory detecting method according to claim 1, wherein the first time point is a time point when the compressed gas is ejected. The high-pressure gas inventory detecting method according to claim 1, wherein the second time point is a time point after the compressed gas is ejected. The utility model relates to a high-pressure gas inventory detecting device, which is used for measuring the gas inventory of a gas storage container, and the structure thereof comprises: a first sensing unit: used for measuring the temperature of the ejecting port end of the gas storage container; and a second sensing unit : for measuring the temperature of the surrounding environment; and calculating unit: receiving the temperature values of the first sensing unit and the second sensing unit, and outputting the stored signal after the operation. The high-pressure gas inventory detecting device according to the fourth aspect of the invention, wherein the calculation unit is configured to: separately measure the ejecting end of the gas storage container and the surrounding environment, respectively, after the ejecting of the compressed gas and the ejecting of the compressed gas Temperature difference; subtract the two temperature difference values; divide the obtained value by the time difference between the compressed gas eruption and the compressed gas eruption; output the numerical signal. The high-pressure gas inventory detecting device according to claim 4, wherein the calculating unit is provided with an analog-to-digital conversion signal conversion component.