CN107589042B - System and method for measuring density of liquid medicine and method for measuring water level of liquid medicine by using same - Google Patents
System and method for measuring density of liquid medicine and method for measuring water level of liquid medicine by using same Download PDFInfo
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- 239000007788 liquid Substances 0.000 title claims abstract description 178
- 239000003814 drug Substances 0.000 title claims abstract description 102
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 18
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- 239000000126 substance Substances 0.000 claims description 40
- 230000005587 bubbling Effects 0.000 claims description 29
- 238000005187 foaming Methods 0.000 claims description 24
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- 239000007789 gas Substances 0.000 description 96
- 239000006260 foam Substances 0.000 description 5
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Abstract
本发明涉及一种药液密度测量系统、药液密度测量方法及利用其的药液水位测量方法,包括:药液测量管,其与药液槽相连,有药液槽的药液填充,而药液槽内盛有根据时间密度变化的药液;第一流入管,其下端开放于药液测量管内部空间中的第一位置,并引导供应到药液内部的空气至药液测量管内部空间;第二流入管,其下端开放于药液测量管内部空间中比第一位置高出第一间距的第二位置,并引导气体至药液测量管内部空间;向第一流入管和第二流入管供应气体的第一供气单元和第二供气单元以及计算药液密度的控制单元。
The invention relates to a liquid medicine density measurement system, a liquid medicine density measurement method and a liquid medicine water level measurement method using the same, comprising: a liquid medicine measuring tube, which is connected with a liquid medicine tank, and is filled with the liquid medicine of the liquid medicine tank; The liquid medicine tank contains the liquid medicine that changes according to the time density; the first inflow pipe, the lower end of which is opened at the first position in the internal space of the liquid medicine measuring tube, and guides the air supplied to the inside of the liquid medicine to the inner space of the liquid medicine measuring tube a second inflow pipe, the lower end of which is opened at a second position higher than the first position by the first spacing in the internal space of the liquid medicine measuring pipe, and guides the gas to the internal space of the liquid medicine measuring pipe; to the first inflow pipe and the second inflow pipe A first gas supply unit and a second gas supply unit for supplying gas and a control unit for calculating the density of the liquid medicine.
Description
技术领域technical field
本发明涉及一种药液密度测量系统、药液密度测量方法及利用其的药液水位测量方法,具体来讲,是关于一种可连续正确测量药液密度实时变化的药液密度测量系统、药液密度测量方法及利用其的药液水位测量方法。The invention relates to a liquid medicine density measurement system, a liquid medicine density measurement method and a liquid medicine water level measurement method using the same, in particular to a liquid medicine density measurement system that can continuously and correctly measure the real-time change of the liquid medicine density, A method for measuring the density of a liquid medicine and a method for measuring the level of a liquid medicine using the same.
背景技术Background technique
一般来讲,可利用各种传感器(Sensor)测量储藏在药液灌的药液水位(Level)。利用传感器的水位测量方法可根据接触测量对象与否分为接触式测量方法和非接触式测量方法。Generally speaking, various sensors (Sensor) can be used to measure the liquid level (Level) of the liquid medicine stored in the liquid medicine tank. Water level measurement methods using sensors can be divided into contact measurement methods and non-contact measurement methods according to whether or not the measurement object is in contact.
接触式测量方法可举水位传感器(Level Sensor)。但利用此类非接触式测量方法,可发生各种安全性问题。例如,测量具有毒性或强腐蚀性的特定药液时,因传感器的接触部位腐蚀而吸收杂质,导致纯度降低,进而药液暴露在有害成分中。The contact measurement method can be a water level sensor (Level Sensor). But with such non-contact measurement methods, various safety issues can arise. For example, when measuring a specific chemical that is toxic or highly corrosive, impurities are absorbed due to corrosion of the contact part of the sensor, resulting in a decrease in purity and exposure of the chemical to harmful components.
非接触式测量方法可举电容式传感器。一般可采用“水位树(Level tree)”方式,即在连接药液罐上下端的管道的适当位置上设置多个电容式传感器,已测量各位置的药液有无。但是,此类方式很难正确测量到药液罐内部的药液水位。Examples of non-contact measurement methods include capacitive sensors. Generally, a "level tree" method can be adopted, that is, a plurality of capacitive sensors are set at the appropriate positions of the pipes connecting the upper and lower ends of the liquid medicine tank, and the presence or absence of the liquid medicine at each position has been measured. However, it is difficult to accurately measure the liquid level of the liquid medicine inside the liquid medicine tank.
尤其,由于现有的水位传感器在测量随时间推移变化的药液成分时,因其药液密度的变化而出现相当大的误差。In particular, when the conventional water level sensor measures the chemical composition that changes with the passage of time, a considerable error occurs due to the change of the chemical density.
发明内容SUMMARY OF THE INVENTION
(要解决的问题)(problem to be solved)
本发明要解决的问题是提供一种可连续正确测量药液密度实时变化的药液密度测量系统、药液密度测量方法及利用其的药液水位测量方法。(解决问题的手段)The problem to be solved by the present invention is to provide a liquid medicine density measurement system, a liquid medicine density measurement method and a liquid medicine water level measurement method using the same, which can continuously and correctly measure the real-time change of the liquid medicine density. (means to solve the problem)
为解决上述本发明要解决的问题,本发明提供一种药液密度测量系统、药液密度测量方法及利用其的药液水位测量方法,其特征在于,包括:药液测量管,其与药液槽相连,有前述药液槽的药液流入,而药液槽内盛有根据时间密度变化的药液;第一流入管,其下端开放于上述药液测量管内部空间中的第一位置,并引导供应到上述药液内部的空气至上述药液测量管内部空间;第二流入管,其下端开放于上述药液测量管内部空间中比上述第一位置高出第一间距的第二位置,并引导上述气体至上述药液测量管内部空间;第一供气单元,其向上述第一流入管供应上述气体,以便在上述第一位置测量药液的压力;第二供气单元,其向上述第二流入管供应上述气体,以便在上述第二位置测量药液的压力;以及控制单元,基于从上述第一流入管排放的气体在挤压第一位置的药液时的第一压力,从上述第二流入管排放的气体在挤压第二位置的药液时的第二压力,以及上述第一间距计算上述药液密度。In order to solve the above-mentioned problems to be solved by the present invention, the present invention provides a liquid medicine density measurement system, a liquid medicine density measurement method and a liquid medicine water level measurement method using the same, characterized in that it includes: a liquid medicine measuring tube, which is connected with the medicine liquid. The liquid tanks are connected, and the liquid medicine of the liquid medicine tank flows in, and the liquid medicine tank contains the liquid medicine that changes according to the time density; the lower end of the first inflow pipe is opened at the first position in the inner space of the liquid medicine measuring tube, and guide the air supplied to the inside of the medicinal solution to the interior space of the medicinal solution measuring tube; the second inflow tube, the lower end of which is opened at a second position in the interior space of the medicinal solution measuring tube that is higher than the first position by the first distance , and guide the above-mentioned gas to the inner space of the above-mentioned chemical liquid measuring tube; a first gas supply unit, which supplies the above-mentioned gas to the above-mentioned first inflow pipe, so as to measure the pressure of the chemical liquid at the above-mentioned first position; The second gas supply unit, which supplies the above-mentioned gas to the above-mentioned first inflow pipe The above-mentioned second inflow pipe supplies the above-mentioned gas to measure the pressure of the medicinal liquid at the above-mentioned second position; and a control unit, based on the first pressure of the gas discharged from the above-mentioned first inflow pipe when squeezing the medicinal liquid at the first position, from the first position. The density of the chemical liquid is calculated from the second pressure of the gas discharged from the second inflow pipe when it squeezes the chemical liquid at the second position, and the above-mentioned first distance.
上述控制单元可利用下列【公式1】计算上述药液密度。The above-mentioned control unit can calculate the above-mentioned chemical liquid density using the following [Formula 1].
【公式1】【Formula 1】
公式中,ρ为密度、g为重力加速度、△P为第一压力和第二压力之差、△H为第一间距。In the formula, ρ is the density, g is the acceleration of gravity, ΔP is the difference between the first pressure and the second pressure, and ΔH is the first distance.
上述第一供气单元包括:供应上述气体至上述第一流入管的第一供气部位、连接上述第一供气部位和上述第一流入管的第一供应线,以及位于上述第一供应线上控制上述气体的第一控制阀。The first gas supply unit includes: a first gas supply part for supplying the gas to the first inflow pipe, a first supply line connecting the first gas supply part and the first inflow pipe, and a control system located on the first supply line. The first control valve for the above-mentioned gas.
上述第二供气单元包括:供应上述气体至上述第二流入管的第二供气部位、连接上述第二供气部位和上述第二流入管的第二供应线,以及位于上述第二供应线上控制上述气体的第二控制阀。The second gas supply unit includes: a second gas supply part for supplying the gas to the second inflow pipe, a second supply line connecting the second gas supply part and the second inflow pipe, and a second supply line located on the second supply line A second control valve that controls the above gas.
同时,上述药液密度测量系统还可包括:第一传感器,其位于上述第一供气单元上,用于确认因流入上述第一流入管的气体而出现的药液起泡周期;以及,第二传感器,其位于上述第二供气单元上,用于确认因流入上述第二流入管的气体而出现的药液起泡周期。At the same time, the above-mentioned chemical liquid density measurement system may further include: a first sensor, which is located on the above-mentioned first gas supply unit, used for confirming the chemical liquid foaming period caused by the gas flowing into the above-mentioned first inflow pipe; and, a second A sensor, which is located on the second gas supply unit, is used to confirm the foaming cycle of the chemical solution caused by the gas flowing into the second inflow pipe.
上述控制单元可根据通过上述第一传感器测量到的药液第一起泡周期,以及通过上述第二传感器测量到的药液第二起泡周期,预测通过上述第一流入管流入的气体第一流量和通过上述第二流入管流入的气体第二流量,判断上述第一流量和上述第二流量是否超出各自允许范围。The above-mentioned control unit can predict the first flow rate of the gas flowing in through the above-mentioned first inflow pipe according to the first bubbling period of the medicinal liquid measured by the above-mentioned first sensor and the second bubbling period of the medicinal liquid measured by the above-mentioned second sensor. It is determined whether the first flow rate and the second flow rate exceed their respective allowable ranges through the second flow rate of the gas flowing into the second inflow pipe.
同时,上述控制单元可判断上述第一流量和上述第二流量是否具有实质性相同的值;若上述第一流量和上述第二流量的数值不同时,通过上述第一控制阀和上述第二控制阀中的至少一个来调节气流量。At the same time, the control unit can determine whether the first flow rate and the second flow rate have substantially the same value; if the values of the first flow rate and the second flow rate are different, the first control valve and the second control valve are used to control the at least one of the valves to adjust the airflow.
此外,上述药液密度测量系统还可包括提醒工具,即当上述第一流量和上述第二流量超出各自的允许范围时,通知外部该情况。In addition, the above-mentioned liquid medicine density measurement system may further include a reminder tool, that is, when the above-mentioned first flow rate and the above-mentioned second flow rate exceed their respective allowable ranges, the outside is notified of the situation.
根据本发明的不同实施形式,关于利用所述药液密度测量系统测量药液密度的方法,提供一种药液密度测量方法。其包括以下步骤:将上述第一流入管的下端和上述第二流入管的下端设置在上述药液测量管上,使两者具有上述第一间距的步骤;测量上述第一压力和上述第二压力的步骤;以及,根据上述第一压力、上述第二压力及上述第一间距计算上述药液密度的步骤。According to different implementation forms of the present invention, regarding the method for measuring the density of a medicinal liquid by using the medicinal liquid density measuring system, a method for measuring the medicinal liquid density is provided. It includes the following steps: disposing the lower end of the first inflow pipe and the lower end of the second inflow pipe on the medicinal liquid measuring pipe, so that the two have the above-mentioned first distance; measuring the above-mentioned first pressure and the above-mentioned second pressure and the step of calculating the density of the medicinal solution according to the first pressure, the second pressure and the first distance.
上述药液密度测量方法还可包括以下步骤:在测量因流入上述第一流入管的气体而出现的药液第一起泡周期的同时,测量因流入上述第二流入管的气体而出现的药液第二起泡周期的步骤;根据上述第一起泡周期和上述第二起泡周期,预测通过上述第一流入管流入气体的第一流量和通过上述第二流入管流入气体的第二流量的步骤;判断上述第一流量和上述第二流量是否在各自的允许范围内的步骤;以及,当上述第一流量和上述第二流量中,至少有一个超出各自的允许范围时,通过控制与上述第一流入管相连的第一控制阀以及与上述第二流入管相连的第二控制阀中的任意一个控制阀来调节气体流量的步骤。The above-mentioned method for measuring the density of the medicinal liquid may further include the following steps: while measuring the first bubbling period of the medicinal liquid caused by the gas flowing into the above-mentioned first inflow pipe, measuring the first bubbling period of the medicinal liquid caused by the gas flowing into the above-mentioned second inflow pipe. The steps of two bubbling cycles; the steps of predicting the first flow rate of the gas flowing into the gas through the first inflow pipe and the second flow rate of the gas flowing through the second inflow pipe according to the first bubbling period and the second bubbling period; Judging The step of whether the above-mentioned first flow rate and the above-mentioned second flow rate are within the respective allowable ranges; and, when at least one of the above-mentioned first flow rates and the above-mentioned second flow rates exceeds the respective allowable ranges, by controlling the first flow rate and the above-mentioned first inflow pipe The step of adjusting the gas flow by controlling any one of the connected first control valve and the second control valve connected with the above-mentioned second inflow pipe.
同时,上述药液密度测量方法还可包括提醒步骤,即当上述第一流量和上述第二流量超出各自的允许范围时,将该情况通知外部的步骤。Meanwhile, the above-mentioned method for measuring the density of medicinal liquid may further include a reminding step, that is, when the above-mentioned first flow rate and the above-mentioned second flow rate exceed their respective allowable ranges, a step of notifying the outside of the situation.
根据本发明的另一种实施方式,关于利用本发明所述的药液密度测量方法测量药液水位的方法,提供一种药液水位测量方法,其包括利用下列【公式1】计算上述药液密度的步骤,以及基于上述药液密度,利用下列【公式2】计算上述药液水位的步骤。According to another embodiment of the present invention, with regard to the method for measuring the water level of the medicinal liquid using the medicinal liquid density measurement method of the present invention, a method for measuring the medicinal liquid level is provided, which comprises calculating the above medicinal liquid using the following [Formula 1] The density step, and the step of calculating the above-mentioned chemical liquid level based on the above-mentioned chemical liquid density using the following [Formula 2].
【公式1】【Formula 1】
公式中,ρ为密度、g为重力加速度、△P为第一压力和第二压力之差、△H为第一间距;In the formula, ρ is the density, g is the acceleration of gravity, ΔP is the difference between the first pressure and the second pressure, and ΔH is the first distance;
【公式2】[Formula 2]
公式中,H为药液的水位、ρ为密度、g为重力加速度、P2为从上述第二流入管排放的气体在挤压第二位置的药液时的第二压力。In the formula, H is the water level of the liquid medicine, ρ is the density, g is the acceleration of gravity, and P2 is the second pressure of the gas discharged from the second inflow pipe when squeezing the liquid medicine at the second position.
附图说明Description of drawings
图1是显示本发明所述药液密度测量系统的主要结构的图面。FIG. 1 is a view showing the main structure of the chemical liquid density measuring system according to the present invention.
图2是本发明所述药液密度测量方法及药液水位测量犯法的流程说明图。FIG. 2 is an explanatory diagram of the flow chart of the method for measuring the density of the medicinal liquid and the measurement of the medicinal liquid level according to the present invention.
图3a和图3b是显示因供应至药液测量管而随时间出现药液压力变化的图面。3a and 3b are graphs showing changes in the pressure of the liquid medicine with time due to the supply to the liquid medicine measuring tube.
图4为显示供应至药液测量管的气体流量和起泡周期之间关系的图面。FIG. 4 is a graph showing the relationship between the flow rate of the gas supplied to the chemical liquid measuring tube and the bubbling period.
具体实施方式Detailed ways
下面参考附图说明可具体实现上述要解决问题的优选实施例。在说明本实施例时,对于同一结构使用同一名称及同一符号,而在下面,相关附加说明将省略。The preferred embodiments that can specifically implement the above-mentioned problems to be solved will be described below with reference to the accompanying drawings. When describing the present embodiment, the same names and symbols are used for the same structures, and the related additional descriptions will be omitted below.
参考图1至图4,如下说明本发明所述药液密度测量系统、药液密度测量方法及药液水位测量方法的一种实施例。Referring to FIG. 1 to FIG. 4 , an embodiment of the liquid medicine density measurement system, the liquid medicine density measurement method and the liquid medicine water level measurement method according to the present invention will be described as follows.
在本实施例中,药液密度测量系统包括药液测量管(100)、第一流入管(210)、第二流入管(220)、第一供气单元、第二供气单元、第一传感器(310)、第二传感器(320)、提醒工具(未图示)及控制单元(未图示)。In this embodiment, the liquid medicine density measurement system includes a liquid medicine measurement tube (100), a first inflow tube (210), a second inflow tube (220), a first air supply unit, a second air supply unit, and a first sensor (310), a second sensor (320), a reminder tool (not shown) and a control unit (not shown).
上述药液测量管(100)与药液槽相连,并有上述药液槽的药液填充,而药液槽内盛有根据时间密度变化的药液。The medicinal solution measuring tube (100) is connected to the medicinal solution tank, and is filled with the medicinal solution of the medicinal solution slot, and the medicinal solution tank contains the medicinal solution that changes according to the time density.
上述第一流入管(210)下端开放于上述药液测量管(100)内部空间中的第一位置。上述第一流入管(210)引导供应到上述药液内部的空气至上述药液测量管(100)内部空间。The lower end of the first inflow pipe (210) is open at a first position in the inner space of the medicinal solution measuring pipe (100). The above-mentioned first inflow pipe (210) guides the air supplied to the inside of the above-mentioned chemical liquid to the inner space of the above-mentioned chemical liquid measuring pipe (100).
当气体流入上述第一流入管(210),在上述第一流入管(210)末端上述气体挤压上述药液测量管(100)内部空间储藏的药液,并形成泡沫。受到上述泡沫生成的影响,由上述第一传感器(310)测量的药液压力将根据时间发生周期性变化。When the gas flows into the first inflow pipe (210), the gas at the end of the first inflow pipe (210) squeezes the liquid medicine stored in the inner space of the liquid medicine measuring tube (100) and forms foam. Affected by the above-mentioned foam generation, the pressure of the liquid medicine measured by the above-mentioned first sensor (310) will periodically change according to time.
在此,因上述第一流入管(210)的气体生成的上述泡沫,而导致的上述药液压力根据时间的变化周期称为第一起泡周期。Here, the period of time-dependent change in the chemical liquid pressure caused by the foam generated by the gas in the first inflow pipe (210) is referred to as a first foaming period.
上述第二流入管(220)的下端开放于上述药液测量管(100)的内部空间中比上述第一位置高出第一间距(△H)的第二位置。上述第二流入管(220)引导供应至上述第二供气单元的气体至上述药液测量管(100)内部空间。The lower end of the second inflow tube (220) is opened at a second position in the inner space of the chemical solution measuring tube (100) that is higher than the first position by a first distance (ΔH). The second inflow pipe (220) guides the gas supplied to the second gas supply unit to the inner space of the chemical solution measuring pipe (100).
当气体流入上述第二流入管(220),在上述第二流入管(220)末端上述气体挤压上述药液测量管(100)内部空间储藏的药液,并形成泡沫。受到上述泡沫生成的影响,由上述第二传感器(320)所测量的药液压力将根据时间发生变化,显示为第二起泡周期。When the gas flows into the second inflow pipe (220), the gas at the end of the second inflow pipe (220) squeezes the liquid medicine stored in the inner space of the liquid medicine measuring tube (100) and forms foam. Under the influence of the above-mentioned foam generation, the pressure of the liquid medicine measured by the above-mentioned second sensor (320) will change according to time, which is displayed as the second foaming cycle.
上述第一供气单元为测量上述第一位置上的药液压力,将上述气体供应至上述第一流入管(210);而上述第二供气单元为测量上述第二位置上的药液压力,将上述气体供应至上述第二流入管(220)。在此,上述气体可为清洁干燥气源(CDA:Clean Dry Air)或氮气。The first gas supply unit measures the pressure of the liquid medicine at the first position, and supplies the gas to the first inflow pipe (210); and the second gas supply unit measures the pressure of the liquid medicine at the second position, The above-mentioned gas is supplied to the above-mentioned second inflow pipe (220). Here, the above-mentioned gas may be a clean dry air source (CDA: Clean Dry Air) or nitrogen.
具体来讲,上述第一供气单元包括:供应上述气体至上述第一流入管(210)的第一供气部位(510)、连接上述第一供气部位(510)和上述第一流入管(210)的第一供应线(411),以及位于上述第一供应线(411)上控制上述气流的第一控制阀(410)。Specifically, the first gas supply unit includes: a first gas supply part (510) for supplying the gas to the first inflow pipe (210), connecting the first gas supply part (510) and the first inflow pipe (210) ) of the first supply line (411), and a first control valve (410) located on the first supply line (411) to control the air flow.
同时,上述第二供气单元包括:供应上述气体至上述第二流入管(220)的第二供气部位(520)、连接上述第二供气部位(520)和上述第二流入管(220)的第二供应线(421),以及位于上述第二供应线(421)上控制上述气流的第二控制阀(420)。Meanwhile, the second gas supply unit includes: a second gas supply part (520) for supplying the gas to the second inflow pipe (220), connecting the second gas supply part (520) and the second inflow pipe (220) ) of the second supply line (421), and a second control valve (420) located on the second supply line (421) to control the air flow.
上述第一传感器(310)配置于上述第一供气单元,即上述第一供应线(411)上,用于确认因流入上述第一流入管(210)的流入气体而出现的第一起泡周期。The first sensor (310) is arranged on the first gas supply unit, that is, the first supply line (411), and is used to confirm the first bubbling cycle that occurs due to the inflow gas flowing into the first inflow pipe (210).
具体来讲,上述第一传感器(310)测量因上述气体流入而随时间发生变化的上述第一位置药液压力。Specifically, the first sensor (310) measures the pressure of the chemical solution at the first position that changes with time due to the inflow of the gas.
在此,若上述气体流量较少,则因上述气体出现的起泡不顺畅,导致压力上升的错误;相反,若上述气体流量较多,上述第一起泡周期则会比上述第一传感器的响应时间短,导致测量信号的抵消(Offset)现象,最终导致正确度低下。Here, if the gas flow rate is small, the foaming of the gas will not be smooth, resulting in an error of pressure rise; on the contrary, if the gas flow rate is large, the first foaming cycle will be slower than the response of the first sensor. The short time leads to the offset phenomenon of the measurement signal, which eventually leads to low accuracy.
因此,通过上述第一流入管(210)的流入的气体流量应具第一允许范围。Therefore, the inflow gas flow rate through the first inflow pipe (210) should have a first allowable range.
图3(a)显示的是当气体流量为30cc/min时在上述第一传感器(310)测量到的药液第一位置压力变化。图3(b)显示的是当气体流量为40cc/min时在上述第一传感器(310)测量到的药液第一位置压力变化。可见,气体流量越多,第一起泡周期越短。Figure 3(a) shows the pressure change at the first position of the medicinal liquid measured by the first sensor (310) when the gas flow rate is 30 cc/min. Figure 3(b) shows the pressure change at the first position of the liquid medicine measured by the first sensor (310) when the gas flow rate is 40cc/min. It can be seen that the more gas flow, the shorter the first foaming cycle.
同时,见图4,当气体流量为20cc/min时,第一起泡周期为1.36sec;当气体流量为40cc/min时,第一起泡周期为0.92sec;当气体流量为60cc/min时,第一起泡周期显示为0.527sec。由此可知,第一起泡周期和气体流量呈线性关系。Meanwhile, see Figure 4, when the gas flow rate is 20cc/min, the first foaming period is 1.36sec; when the gas flow rate is 40cc/min, the first foaming period is 0.92sec; when the gas flow rate is 60cc/min, the first foaming period is 0.92sec; The bubble period is shown to be 0.527sec. It can be seen that there is a linear relationship between the first foaming cycle and the gas flow rate.
在此,上述第一起泡周期在上述第一传感器(310)测量的压力波形呈一定形状下,优选考虑上述第一传感器响应时间后进行设置。Here, when the pressure waveform measured by the first sensor (310) has a certain shape, the first foaming period is preferably set after considering the response time of the first sensor.
同样,上述第二传感器(320)位于上述第二供气单元,即上述第二供应线(421)上,用于确认因流入上述第二流入管(220)的流入气体而出现的第二起泡周期。Similarly, the above-mentioned second sensor (320) is located on the above-mentioned second gas supply unit, namely the above-mentioned second supply line (421), and is used to confirm the occurrence of a second occurrence due to the inflow gas flowing into the above-mentioned second inflow pipe (220). bubble cycle.
上述控制单元以基于如下参数计算上述药液密度:从上述第一流入管(210)排放的气体挤压上述第一位置的药液时的第一压力;从上述第二流入管(220)排放的气体挤压上述第二位置的药液时的第二压力;以及上述第一间距(△H)。The control unit calculates the density of the medicinal liquid based on the following parameters: the first pressure when the gas discharged from the first inflow pipe (210) squeezes the medicinal liquid at the first position; the density of the medicinal liquid discharged from the second inflow pipe (220) the second pressure when the gas presses the medicinal solution at the second position; and the first distance (ΔH).
具体来讲,上述控制单元可利用下列【公式1】计算上述药液密度。Specifically, the above-mentioned control unit may calculate the above-mentioned chemical liquid density using the following [Formula 1].
【公式1】【Formula 1】
公式中,ρ为密度、g为重力加速度、△P为第一压力和第二压力之差、△H为第一间距。In the formula, ρ is the density, g is the acceleration of gravity, ΔP is the difference between the first pressure and the second pressure, and ΔH is the first distance.
从结果来看,可利用在第一流入管气体挤压药液时的第一压力、在第二流入管气体挤压药液时的第二压力,以及第一流入管下端和第二流入管下端之间的第一间距,简单实时测量随时间变化的药液密度。From the results, it is possible to use the first pressure when the first inflow pipe gas squeezes the chemical liquid, the second pressure when the second inflow pipe gas squeezes the chemical liquid, and the difference between the lower end of the first inflow pipe and the lower end of the second inflow pipe. The first distance between the two, simple real-time measurement of the liquid density over time.
当然,本发明不限于此,上述第一压力和上述第二压力可设置为时间段的平均值,此时,以在上述第一传感器及上述第二传感器测量压力的取样时间段为准。Of course, the present invention is not limited to this, and the first pressure and the second pressure can be set as the average value of the time period. In this case, the sampling time period in which the pressure is measured by the first sensor and the second sensor shall prevail.
同时,上述控制单元将基于由上述第一传感器测量的药液第一起泡周期,以及由上述第二传感器测量的药液第二起泡周期,预测通过上述第一流入管流入的气体第一流量,以及通过上述第二流入管流入的气体第二流量。At the same time, the control unit will predict the first flow rate of the gas flowing through the first inflow pipe based on the first foaming period of the chemical liquid measured by the first sensor and the second foaming period of the chemical liquid measured by the second sensor, and the second flow rate of the gas flowing in through the second inflow pipe.
如图4所示,上述起泡周期和气体流量呈线性关系,可从上述第一起泡周期及上述第二起泡周期计算出上述第一流量及上述第二流量。As shown in FIG. 4 , the foaming period and the gas flow rate have a linear relationship, and the first flow rate and the second flow rate can be calculated from the first foaming period and the second foaming period.
上述控制单元判断上述第一流量和上述第二流量是否脱离各自的允许范围。当上述第一流量和上述第二流量超出其各自的允许范围时,上述第一控制阀及上述第二控制阀进行调整,进而调节上述第一流量及上述第二流量。The control unit judges whether the first flow rate and the second flow rate deviate from their respective allowable ranges. When the first flow rate and the second flow rate exceed their respective allowable ranges, the first control valve and the second control valve are adjusted to further adjust the first flow rate and the second flow rate.
在此,为降低药液密度的误差,上述第一流量和上述第二流量实质上应为相同值。Here, in order to reduce the error in the density of the chemical solution, the first flow rate and the second flow rate should be substantially the same value.
上述控制单元判断上述第一流量和上述第二流量是否具有实质上相同的值。当上述第一流量和上述第二流量具有不同值时,通过上述第一控制阀和上述第二控制阀中至少一个来调节气体流量。The control unit determines whether the first flow rate and the second flow rate have substantially the same value. When the first flow rate and the second flow rate have different values, the gas flow rate is adjusted by at least one of the first control valve and the second control valve.
另一方面,当上述第一流量和上述第二流量超出各自的允许范围,或上述第一流量和上述第二流量显示不同值时,上述提醒工具将显示该状态信息至外部告知作业人员。On the other hand, when the first flow rate and the second flow rate exceed their respective allowable ranges, or the first flow rate and the second flow rate show different values, the reminder tool will display the status information to the outside to inform the operator.
上述提醒工具显示信息的方法可以是:以LED形式发光提醒;以扬声器形式用声音或语音显示信息;或者以显示器件的形式用文字显示信息。The method for displaying information by the above-mentioned reminder tool may be: emitting reminder in the form of LED; displaying information in the form of a speaker by sound or voice; or displaying the information in the form of a display device by text.
参考图1及图2,如下说明本发明所述药液密度测量系统、药液密度测量方法及利用其的药液水位测量方法。1 and 2 , the liquid medicine density measurement system, the liquid medicine density measurement method, and the liquid medicine water level measurement method using the same according to the present invention will be described as follows.
首先,用户将第一流入管(210)的下端和第二流入管(220)的下端配置在药液测量管(100),使两者有第一间距(△H)。First, the user arranges the lower end of the first inflow pipe (210) and the lower end of the second inflow pipe (220) on the liquid medicine measuring pipe (100) with a first distance (ΔH).
随后,启动药液密度测量系统,此时第一传感器(310)测量药液测量管(100)第一位置上的药液压力,即就是第一压力。同时,第二传感器(320)测量药液测量管(100)第二位置上的药液压力,即就是第二压力。Then, the liquid medicine density measurement system is activated, and at this time, the first sensor (310) measures the liquid medicine pressure at the first position of the liquid medicine measuring tube (100), that is, the first pressure. At the same time, the second sensor (320) measures the pressure of the liquid medicine at the second position of the liquid medicine measuring tube (100), that is, the second pressure.
由此,控制单元可根据上述第一压力、上述第二压力及上述第一间距,计算出上述药液密度(S40)。Thus, the control unit can calculate the density of the chemical solution based on the first pressure, the second pressure, and the first distance (S40).
在此,为降低药液密度的误差,需要将适当流量的气体统一供应至上述第一流入管(210)及上述第二流入管(220)。Here, in order to reduce the error in the density of the chemical solution, it is necessary to uniformly supply the gas at an appropriate flow rate to the first inflow pipe (210) and the second inflow pipe (220).
为此,上述第一传感器(310)将测量因流入上述第一流入管(210)的气体而出现的药液第一起泡周期,而上述第二传感器(320)则监控因流入上述第二流入管(220)的气体而出现的药液第二起泡周期(S10)。To this end, the first sensor (310) will measure the first bubbling cycle of the liquid medicine due to the gas flowing into the first inflow pipe (210), and the second sensor (320) will monitor the first bubbling cycle of the liquid medicine due to the gas flowing into the second inflow pipe (210). (220) The second bubbling cycle (S10) of the chemical solution appears due to the gas.
此时,上述控制单元将根据上述第一起泡周期和上述第二起泡周期预测并确认通过上述第一流入管(210)流入的气体第一流量,以及通过上述第二流入管(220)流入的气体第二流量(S20)。At this time, the control unit will predict and confirm the first flow rate of the gas flowing in through the first inflow pipe (210) and the gas flowing in through the second inflow pipe (220) according to the first bubbling period and the second bubbling period. A second flow of gas (S20).
随后,上述控制单元将判断上述第一流量和上述第二流量是否在各自允许范围之内。Subsequently, the above-mentioned control unit will judge whether the above-mentioned first flow rate and the above-mentioned second flow rate are within their respective allowable ranges.
接下来,当上述第一流量和上述第二流量中的任何一个流量超出各自的允许范围时,上述控制单元将控制连接于上述第一流入管的第一控制阀和连接于上述第二流入管的第二控制阀中的任意一个控制阀来调节气体流量(S30)。Next, when any one of the first flow rate and the second flow rate exceeds their respective allowable ranges, the control unit will control the first control valve connected to the first inflow pipe and the valve connected to the second inflow pipe. Any one of the second control valves controls the gas flow rate (S30).
不仅如此上述控制单元在判断上述第一流量和上述第二流量是否具有实质上的相同值后,若上述第一流量和上述第二流量具有不同值,则通过上述第一控制阀和上述第二控制阀中的任意一个控制阀来调节气体流量。Not only that, after the control unit judges whether the first flow rate and the second flow rate have substantially the same value, if the first flow rate and the second flow rate have different values, the first control valve and the second flow rate will pass through the first control valve and the second flow rate. Control any of the control valves to adjust the gas flow.
从结果来看,测量因流入第一流入管(210)的气体而出现的药液第一起泡周期,以及因流入第二流入管(220)的气体出现的药液第二起泡周期,并以上述第一起泡周期和上述第二起泡周期为基础,预测通过上述第一流入管(210)流入的气体第一流量,以及通过上述第二流入管(220)流入的气体第二流量,控制上述第一流量和上述第二流量保持相同值,从而降低因流量差导致的药液密度误差。From the results, the first bubbling cycle of the medicinal solution due to the gas flowing into the first inflow pipe (210) and the second bubbling cycle of the medicinal solution due to the gas flowing into the second inflow tube (220) were measured, and the Based on the first bubbling cycle and the second bubbling cycle, the first flow rate of the gas flowing in through the first inflow pipe (210) and the second flow rate of the gas flowing in through the second inflow pipe (220) are predicted to control the above-mentioned The first flow rate and the above-mentioned second flow rate maintain the same value, thereby reducing the density error of the liquid medicine caused by the difference in flow rate.
在此,当上述第一流量和上述第二流量超出各自的允许范围,或者上述第一流量和上述第二流量显示不同值时,提醒工具将该情况信息显示于外部。Here, when the first flow rate and the second flow rate exceed their respective allowable ranges, or the first flow rate and the second flow rate show different values, the reminder tool displays the information on the outside.
然后,控制单元将根据上述药液密度,利用下列【公式2】计算上述药液水位(S50)。Then, the control unit will calculate the above-mentioned chemical liquid level according to the above-mentioned chemical liquid density using the following [Formula 2] (S50).
【公式2】[Formula 2]
公式中,H为药液水位、ρ为密度、g为重力加速度、P2为从上述第二流入管排放的气体在挤压第二位置的药液时的第二压力。当然,随时间变化的上述药液密度ρ需要事先利用前述的【公式1】计算得出。In the formula, H is the water level of the liquid medicine, ρ is the density, g is the acceleration of gravity, and P2 is the second pressure of the gas discharged from the second inflow pipe when squeezing the liquid medicine at the second position. Of course, the above-mentioned chemical liquid density ρ that changes with time needs to be calculated in advance using the aforementioned [Formula 1].
从结果来看,利用本发明所涉及的药液密度测量系统测量药液密度及药液水位,可替代高额流量计或流量调节器,从而节省相关费用。From the results, using the liquid medicine density measurement system of the present invention to measure the liquid medicine density and the liquid medicine water level can replace a high-value flow meter or a flow regulator, thereby saving relevant costs.
本发明所述药液密度测量系统、药液密度测量方法及利用其的药液水位测量方法的效果如下:The effects of the medicinal liquid density measuring system, medicinal liquid density measuring method and medicinal liquid water level measuring method utilizing the same of the present invention are as follows:
第一、在药液测量管配置第一流入管的下端和第二流入管的下端,使两者具有第一间距后,可利用在第一流入管气体挤压药液时的第一压力、在第二流入管气体挤压药液时的第二压力,简单实时测量随时间变化的药液密度。不仅如此,利用上述药液密度可简单测量上述药液水位。First, the lower end of the first inflow tube and the lower end of the second inflow tube are arranged on the liquid medicine measuring tube, so that the two have a first distance, and the first pressure when the first inflow tube gas squeezes the liquid medicine can be used. The second pressure when the gas in the second inflow tube squeezes the liquid medicine, and the liquid medicine density that changes with time is simply measured in real time. Not only that, the above-mentioned chemical liquid level can be easily measured by using the above-mentioned chemical liquid density.
第二、测量因流入第一流入管的气体而出现的药液第一起泡周期,以及因流入第二流入管的气体而出现的药液第二起泡周期后,利用上述第一起泡周期和上述第二起泡周期预测通过上述第一流入管流入的气体第一流量和通过上述第二流入管流入的气体第二流量,并控制上述第一流量和上述第二流量保持相同值,从而可以减少因流量差导致的药液密度。Second, after measuring the first bubbling cycle of the chemical solution due to the gas flowing into the first inflow pipe, and the second bubbling cycle of the chemical solution due to the gas flowing into the second inflow pipe, use the first bubbling cycle and the above-mentioned first bubbling cycle. The second bubbling cycle predicts the first flow rate of the gas flowing in through the first inflow pipe and the second flow rate of the gas flowing in through the second inflow pipe, and controls the first flow rate and the second flow rate to maintain the same value, thereby reducing the Liquid density due to flow differences.
第三、利用本发明所涉及的药液密度测量系统测量药液密度及药液水位,可替代高额流量计或流量调节器,从而节省相关费用。Third, the use of the liquid medicine density measuring system involved in the present invention to measure the liquid medicine density and the liquid medicine water level can replace a high-value flow meter or a flow regulator, thereby saving relevant costs.
如上所述,本发明不限于以上所述优选实施例。本领域的普通技术人员应当可在本发明的权利索求范围要求保护的技术方案进行各种变形和实施,而此类变形利用不脱离本发明技术方案的范围。As mentioned above, the present invention is not limited to the above-described preferred embodiments. Those skilled in the art should be able to make various modifications and implementations of the technical solutions claimed in the claims of the present invention, and the utilization of such modifications does not depart from the scope of the technical solutions of the present invention.
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JP2789058B2 (en) * | 1989-03-31 | 1998-08-20 | コミッサレ・ア・レナジイ・アトミック | Liquid density and level measuring device |
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JP2789058B2 (en) * | 1989-03-31 | 1998-08-20 | コミッサレ・ア・レナジイ・アトミック | Liquid density and level measuring device |
JP2010008122A (en) * | 2008-06-25 | 2010-01-14 | Panasonic Electric Works Co Ltd | Gas sensor |
JP2010164411A (en) * | 2009-01-15 | 2010-07-29 | Citizen Watch Co Ltd | Thin film gas sensor |
CN104204792A (en) * | 2012-01-27 | 2014-12-10 | Abb技术有限公司 | Acoustic method and device for measuring a fluid density or a fluid viscosity |
CN104237066A (en) * | 2014-09-26 | 2014-12-24 | 哈尔滨东安发动机(集团)有限公司 | Method for measuring density of object |
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