TWI583951B - Ultrasonic fluid measurement apparatus and correcting method thereof - Google Patents
Ultrasonic fluid measurement apparatus and correcting method thereof Download PDFInfo
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本發明是有關於一種量測裝置，且特別是有關於一種超音波流體量測裝置及其校正方法。The present invention relates to a measuring device, and more particularly to an ultrasonic fluid measuring device and a method of correcting the same.
藉由超音波透過介質來傳遞聲波的特性，可廣泛應用在各種不同的探測領域，例如偵測流體流量和濃度的技術即為廣泛的應用之一。習知技術可於流體中發射超音波信號並偵測其於流體中的相位偏移，由於流體的濃度或流速改變會使射入的超音波信號產生相位差，因此藉由量測其相位偏移即可推測流體在濃度或流速上的改變。然而，量測環境的變化，例如量測電子元件特性的差異、超音波管的差異、溫度差異、濕度以及大氣壓力的差異…等等，皆可能造成流量及濃度的量測誤差。Ultrasonic transmission of sound waves through the medium can be widely used in a variety of different detection fields, such as the detection of fluid flow and concentration technology is one of a wide range of applications. Conventional techniques can emit an ultrasonic signal in a fluid and detect its phase shift in the fluid. The phase difference of the injected ultrasonic signal is caused by a change in the concentration or flow rate of the fluid. The shift can be used to predict the change in fluid concentration or flow rate. However, measuring changes in the environment, such as differences in characteristics of measuring electronic components, differences in ultrasonic tubes, temperature differences, humidity, and differences in atmospheric pressure, etc., may cause measurement errors in flow and concentration.
本發明提供一種超音波流體量測裝置及其校正方法，可有效地降低流體的量測誤差，提高流體量測的準確性。The invention provides an ultrasonic fluid measuring device and a calibration method thereof, which can effectively reduce the measurement error of the fluid and improve the accuracy of the fluid measurement.
本發明的超音波流體量測裝置，包括相位偵測單元、儲存單元以及處理單元。其中相位偵測單元於一量測條件下偵測第一超音波信號與第二超音波信號於流體管內傳遞時產生的相位差，以分別得到第一相位差與第二相位差。儲存單元儲存流體管中的流體在不同量測條件下的流體特性資料。處理單元耦接相位偵測單元與儲存單元，依據第一相位差與第二相位差計算流體的流體特性，將流體的流體特性與對應量測條件的流體特性資料進行比對，依據比對結果校正流體特性資料。The ultrasonic fluid measuring device of the present invention comprises a phase detecting unit, a storage unit and a processing unit. The phase detecting unit detects a phase difference generated when the first ultrasonic signal and the second ultrasonic signal are transmitted in the fluid tube under a measurement condition to obtain a first phase difference and a second phase difference, respectively. The storage unit stores fluid characteristic data of the fluid in the fluid tube under different measurement conditions. The processing unit is coupled to the phase detecting unit and the storage unit, and calculates a fluid characteristic of the fluid according to the first phase difference and the second phase difference, and compares the fluid characteristic of the fluid with the fluid characteristic data of the corresponding measuring condition, according to the comparison result. Correct fluid characteristics data.
在本發明的一實施例中，上述的超音波流體量測裝置更包括壓縮機以及溫度感測單元。壓縮機控制流體的流量。溫度感測單元耦接處理單元，感測流體管內的目前溫度，處理單元於壓縮機控制流體處於特定流量與特定濃度時，將在目前溫度以及特定流量下所計算出的流體的流體特性與對應目前溫度、特定流量以及特定濃度的流體特性資料進行比對，並依據比對結果校正對應該目前溫度、特定流量以及特定濃度的流體特性資料。In an embodiment of the invention, the ultrasonic fluid measuring device further includes a compressor and a temperature sensing unit. The compressor controls the flow of fluid. The temperature sensing unit is coupled to the processing unit to sense the current temperature in the fluid tube, and the processing unit calculates the fluid characteristics of the fluid at the current temperature and the specific flow rate when the compressor control fluid is at a specific flow rate and a specific concentration. The current temperature, the specific flow rate, and the specific concentration of the fluid characteristic data are compared, and the current characteristic, the specific flow rate, and the specific concentration of the fluid characteristic data are corrected according to the comparison result.
在本發明的一實施例中，上述的特定流量為零或壓縮機可控制的最大流量。In an embodiment of the invention, the specific flow rate described above is zero or the maximum flow rate controllable by the compressor.
在本發明的一實施例中，上述的第一超音波信號與第二超音波信號的傳遞方向相反。In an embodiment of the invention, the first ultrasonic signal and the second ultrasonic signal are transmitted in opposite directions.
在本發明的一實施例中，上述的流體的流體特性包括第一相位差與第二相位差的差值或和值，處理單元更依據第一相位差與第二相位差的差值或和值校正流體特性資料。In an embodiment of the invention, the fluid characteristic of the fluid includes a difference or a sum of the first phase difference and the second phase difference, and the processing unit further determines the difference or sum of the first phase difference and the second phase difference. Value corrected fluid characteristics data.
在本發明的一實施例中，上述的量測條件包括溫度、溼度、濃度、壓力、流體管形狀大小以及大氣壓力。In an embodiment of the invention, the above measurement conditions include temperature, humidity, concentration, pressure, fluid tube shape size, and atmospheric pressure.
本發明的超音波流體量測校正方法包括下列步驟。於一量測條件下偵測第一超音波信號與第二超音波信號於流體管內傳遞時產生的相位差，以分別得到第一相位差與第二相位差。依據第一相位差與第二相位差計算流體的流體特性。將流體的流體特性與對應量測條件的流體特性資料進行比對。依據比對結果校正流體特性資料。The ultrasonic fluid measurement correction method of the present invention comprises the following steps. The phase difference generated when the first ultrasonic signal and the second ultrasonic signal are transmitted in the fluid tube is detected under a measurement condition to obtain a first phase difference and a second phase difference, respectively. A fluid characteristic of the fluid is calculated based on the first phase difference and the second phase difference. The fluid properties of the fluid are compared to the fluid properties of the corresponding measurement conditions. The fluid property data is corrected based on the comparison results.
在本發明的一實施例中，上述的超音波流體量測校正方法更包括下步驟。於流體處於特定流量與特定濃度時，將在目前溫度、特定流量以及特定濃度下所計算出的流體的流體特性與對應目前溫度、特定流量以及特定濃度的流體特性資料進行比對。依據比對結果校正對應目前溫度、特定流量以及特定濃度的流體特性資料。In an embodiment of the invention, the ultrasonic fluid measurement correction method further includes the following steps. When the fluid is at a specific flow rate and a specific concentration, the fluid characteristics of the fluid calculated at the current temperature, the specific flow rate, and the specific concentration are compared with the current characteristic temperature, the specific flow rate, and the fluid characteristic data of the specific concentration. The fluid properties corresponding to the current temperature, the specific flow rate, and the specific concentration are corrected based on the comparison results.
在本發明的一實施例中，上述的特定流量為零或壓縮機可控制的最大流量。In an embodiment of the invention, the specific flow rate described above is zero or the maximum flow rate controllable by the compressor.
在本發明的一實施例中，上述的第一超音波信號與第二超音波信號的傳遞方向相反。In an embodiment of the invention, the first ultrasonic signal and the second ultrasonic signal are transmitted in opposite directions.
在本發明的一實施例中，上述的流體的流體特性包括第一相位差與第二相位差的差值或和值，超音波流體量測校正方法包括，依據第一相位差與第二相位差的差值或和值校正該流體特性資料。In an embodiment of the invention, the fluid characteristic of the fluid includes a difference or a sum of a first phase difference and a second phase difference, and the ultrasonic fluid measurement correction method comprises: according to the first phase difference and the second phase The difference or sum value of the difference corrects the fluid property data.
在本發明的一實施例中，上述的量測條件包括溫度、溼度、濃度、壓力、流體管形狀大小以及大氣壓力。In an embodiment of the invention, the above measurement conditions include temperature, humidity, concentration, pressure, fluid tube shape size, and atmospheric pressure.
基於上述，本發明的實施例將依據計算得到的流體的流體特性與對應相同量測條件的流體特性資料進行比對，並依據比對結果校正流體特性資料，以降低流體的量測誤差，提高流體量測的準確性。Based on the above, the embodiment of the present invention compares the fluid characteristics of the calculated fluid with the fluid property data corresponding to the same measurement condition, and corrects the fluid property data according to the comparison result to reduce the fluid measurement error and improve The accuracy of fluid measurement.
為讓本發明的上述特徵和優點能更明顯易懂，下文特舉實施例，並配合所附圖式作詳細說明如下。The above described features and advantages of the invention will be apparent from the following description.
圖1是依照本發明一實施例的一種超音波流體量測裝置的示意圖，請參照圖1。超音波流體量測裝置100包括相位偵測單元102、儲存單元104、處理單元106、溫度感測單元108以及壓縮機110，其中相位偵測單元102連接流體管112，以偵測在流體管112內傳遞的超音波信號的相位差。流體管112可包括信號收發端T1以及信號收發端T2、流入口P1以及流出口P2，信號收發端T1以及信號收發端T2耦接處理單元106，信號收發端T1以及信號收發端T2皆可用以發射及接收超音波信號。在本實施例中流入口P1及流出口P2分別供流體流入及流出，流體的流動方向為由信號收發端T1流向信號收發端T2。其中，流體佈滿於流體管112之中，流體之流速或流量可由壓縮機110控制，流體可例如為氣體或液體。1 is a schematic diagram of an ultrasonic fluid measuring device according to an embodiment of the present invention. Please refer to FIG. The ultrasonic fluid measuring device 100 includes a phase detecting unit 102, a storage unit 104, a processing unit 106, a temperature sensing unit 108, and a compressor 110. The phase detecting unit 102 is connected to the fluid tube 112 to detect the fluid tube 112. The phase difference of the ultrasonic signal transmitted inside. The fluid tube 112 can include a signal transceiving end T1 and a signal transceiving end T2, an inflow port P1, and an outflow port P2. The signal transceiving end T1 and the signal transceiving end T2 are coupled to the processing unit 106, and the signal transceiving end T1 and the signal transceiving end T2 can be used. Transmit and receive ultrasonic signals. In the present embodiment, the inflow port P1 and the outflow port P2 respectively supply and flow out the fluid, and the flow direction of the fluid flows from the signal transmitting and receiving end T1 to the signal transmitting and receiving end T2. Wherein the fluid is filled in the fluid tube 112, the flow rate or flow rate of the fluid may be controlled by the compressor 110, which may be, for example, a gas or a liquid.
處理單元106可分別控制信號收發端T1以及信號收發端T2用以發射或接收超音波信號，其中當信號收發端T1為超音波信號的發射端時，信號收發端T2為超音波信號的接收端，相反地，當信號收發端T2為超音波信號的發射端時，信號收發端T1為超音波信號的接收端。由於流體管112中流體的存在，發射端所發射的超音波信號與接收端所接收到的超音波信號會產生相位差，相位偵測單元102可偵測超音波信號於流體管112中傳遞時產生的相位差。在本實施例中，當信號收發端T1為超音波信號的發射端而信號收發端T2為超音波信號的接收端時，相位偵測單元102所量測到的相位差為順向相位差(亦即超音波信號的傳遞方向與流體的流向相同時相位偵測單元102所量測到的相位差)，而當信號收發端T2為超音波信號的發射端而信號收發端T1為超音波信號的接收端時，相位偵測單元102所量測到的相位差為逆向相位差(亦即超音波信號的傳遞方向與流體的流向相反時相位偵測單元102所量測到的相位差)。The processing unit 106 can respectively control the signal transceiver terminal T1 and the signal transceiver terminal T2 for transmitting or receiving an ultrasonic signal. When the signal transceiver terminal T1 is the transmitting end of the ultrasonic signal, the signal transceiver terminal T2 is the receiving end of the ultrasonic signal. Conversely, when the signal transmitting and receiving end T2 is the transmitting end of the ultrasonic signal, the signal transmitting and receiving end T1 is the receiving end of the ultrasonic signal. Due to the presence of fluid in the fluid tube 112, the ultrasonic signal emitted by the transmitting end and the ultrasonic signal received by the receiving end generate a phase difference, and the phase detecting unit 102 can detect the ultrasonic signal transmitted through the fluid tube 112. The phase difference produced. In this embodiment, when the signal transmitting and receiving end T1 is the transmitting end of the ultrasonic signal and the signal transmitting end T2 is the receiving end of the ultrasonic signal, the phase difference measured by the phase detecting unit 102 is the forward phase difference ( That is, when the transmission direction of the ultrasonic signal is the same as the flow direction of the fluid, the phase difference detected by the phase detecting unit 102), and when the signal transmitting and receiving end T2 is the transmitting end of the ultrasonic signal and the signal transmitting and receiving end T1 is the ultrasonic signal. At the receiving end, the phase difference measured by the phase detecting unit 102 is a reverse phase difference (that is, the phase difference measured by the phase detecting unit 102 when the direction of transmission of the ultrasonic signal is opposite to the flow direction of the fluid).
儲存單元104可儲存流體管112中的流體在不同量測條件下的流體特性資料，此處的量測條件可例如包括溫度、溼度、濃度、壓力、流體管形狀大小以及大氣壓力…等等環境或量測裝置的條件。處理單元106可依據順向相位差與逆向相位差計算流體管112中流體的流量及濃度，並依據相位偵測單元102偵測順向相位差與逆向相位差時的量測條件在儲存單元104中找出對應此量測條件的流體特性資料，將計算得到的流體的流體特性與此流體特性資料進行比對，以依據比對結果校正流體特性資料。如此一來，便可有效地將影響超音波流體量測裝置的量測結果的因素去除，進而降低流體的量測誤差，提高流體量測的準確性。The storage unit 104 can store fluid property data of the fluid in the fluid tube 112 under different measurement conditions, and the measurement conditions herein can include, for example, temperature, humidity, concentration, pressure, fluid tube shape size, atmospheric pressure, etc. Or the condition of the measuring device. The processing unit 106 can calculate the flow rate and concentration of the fluid in the fluid tube 112 according to the forward phase difference and the reverse phase difference, and according to the measurement condition when the phase detecting unit 102 detects the forward phase difference and the reverse phase difference in the storage unit 104. The fluid property data corresponding to the measurement condition is found, and the fluid property of the calculated fluid is compared with the fluid property data to correct the fluid property data according to the comparison result. In this way, the factors affecting the measurement result of the ultrasonic fluid measuring device can be effectively removed, thereby reducing the measurement error of the fluid and improving the accuracy of the fluid measurement.
舉例來說，溫度感測單元108可感測流體管112內的目前溫度，處理單元106則於壓縮機110控制流體管112內的流體處於特定流量與特定濃度時(例如流量為零或壓縮機110可控制的最大流量)，將在目前溫度、此特定流量以及此特定濃度下所得到的流體的流體特性與對應目前溫度、此特定流量以及此特定濃度的流體特性資料進行比對，並依據比對結果校正儲存單元104中對應目前溫度、此特定流量以及此特定濃度的流體特性資料。For example, the temperature sensing unit 108 can sense the current temperature within the fluid tube 112, and the processing unit 106 then controls the fluid within the fluid tube 112 at a particular flow rate and a particular concentration (eg, zero flow or compressor). 110 controllable maximum flow rate), comparing the fluid characteristics of the fluid obtained at the current temperature, the specific flow rate, and the specific concentration with the current temperature, the specific flow rate, and the fluid characteristic data of the specific concentration, and The comparison result corrects the current characteristic temperature in the storage unit 104, the specific flow rate, and the fluid characteristic data of the specific concentration.
詳細來說，處理單元106可依據順向相位差與逆向相位差的和值或差值來校正流體特性資料。其中順向相位差與逆向相位差的和值與溫度感測單元108感測到的溫度以及流體的濃度有關，亦即當溫度與濃度相同時，順向相位差與逆向相位差的和值亦應相同。因此，可透過調整儲存單元104中相位差與逆向相位差的和值的方式來校正流體特性資料。舉例來說，假設流體管112中的流體為氧氣，在相同溫度、相同流量、不同濃度的氧氣下相位偵測單元102所偵測到的順向相位差與逆向相位差的和值可如下表一所示： <TABLE border="1" borderColor="#000000" width="_0002"><TBODY><tr><td> 氧氣濃度 </td><td> 21% </td><td> 70% </td><td> 82% </td><td> 100% </td></tr><tr><td> 原和值 </td><td> 921 </td><td> 1505 </td><td> 1569 </td><td> 1712 </td></tr><tr><td> 修正和值 </td><td> 950 </td><td> 1534 </td><td> 1598 </td><td> 1741 </td></tr></TBODY></TABLE>表一 In detail, processing unit 106 may correct the fluid property data based on the sum or difference of the forward phase difference and the reverse phase difference. The sum of the forward phase difference and the reverse phase difference is related to the temperature sensed by the temperature sensing unit 108 and the concentration of the fluid, that is, when the temperature and the concentration are the same, the sum of the forward phase difference and the reverse phase difference is also It should be the same. Therefore, the fluid property data can be corrected by adjusting the sum of the phase difference and the reverse phase difference in the storage unit 104. For example, assuming that the fluid in the fluid tube 112 is oxygen, the sum of the forward phase difference and the reverse phase difference detected by the phase detecting unit 102 at the same temperature, the same flow rate, and different concentrations of oxygen can be as follows. One: <TABLE border="1" borderColor="#000000" width="_0002"><TBODY><tr><td> Oxygen concentration</td><td> 21% </td><td> 70% </ Td><td> 82% </td><td> 100% </td></tr><tr><td> original sum value</td><td> 921 </td><td> 1505 < /td><td> 1569 </td><td> 1712 </td></tr><tr><td> Correction and Value</td><td> 950 </td><td> 1534 </ Td><td> 1598 </td><td> 1741 </td></tr></TBODY></TABLE> Table 1
其中，原和值代表原本儲存單元104所儲存的順向相位差與逆向相位差的和值，在本實施例中，相位偵測單元102為在溫度20℃、氧氣濃度佔21%，且流量為零的量測條件下進行順向相位差與逆向相位差的量測。量測的結果為順向相位差與逆向相位差的和值為950，其與原本儲存單元104所儲存的順向相位差與逆向相位差的和值相差29(950-921=29)，因此處理單元106便可將儲存單元104中其他溫度在20℃且流量為0的情形下不同氧氣濃度所對應的順向相位差與逆向相位差的和值皆加上29。以此類推，對應不同溫度、不同濃度以及不同流體的順向相位差與逆向相位差的和值亦可以此方式校正。如此一來，處理單元106依據修正後的順向相位差與逆向相位差的和值計算所得到的流體的濃度以及流量可更接近實際值，而有效地降低流體的量測誤差，提高流體量測的準確性。The original sum value represents the sum of the forward phase difference and the reverse phase difference stored in the original storage unit 104. In this embodiment, the phase detecting unit 102 has a temperature of 20 ° C, an oxygen concentration of 21%, and a flow rate. The measurement of the forward phase difference and the reverse phase difference is performed under a measurement condition of zero. As a result of the measurement, the sum of the forward phase difference and the reverse phase difference is 950, which is different from the sum of the forward phase difference and the reverse phase difference stored in the original storage unit 104 by 29 (950-921=29), The processing unit 106 can add 29 to the sum of the forward phase difference and the reverse phase difference corresponding to different oxygen concentrations in the case where the other temperature in the storage unit 104 is 20 ° C and the flow rate is 0. By analogy, the sum of the forward phase difference and the reverse phase difference corresponding to different temperatures, different concentrations, and different fluids can also be corrected in this manner. In this way, the processing unit 106 calculates the concentration and flow rate of the obtained fluid according to the sum of the corrected forward phase difference and the reverse phase difference to be closer to the actual value, thereby effectively reducing the measurement error of the fluid and increasing the fluid amount. The accuracy of the measurement.
又例如，假設流體管112中的流體為氧氣，在相同溫度、相同濃度、不同流量的氧氣下相位偵測單元102所偵測到的逆向相位差減去順向相位差的差值可如下表二所示： <TABLE border="1" borderColor="#000000" width="_0003"><TBODY><tr><td> 流量(升/分) </td><td> 0 </td><td> 0.5 </td><td> 5 </td><td> 10 </td></tr><tr><td> 原差值 </td><td> -22.4 </td><td> -12 </td><td> 80.8 </td><td> 169 </td></tr><tr><td> 修正差值 </td><td> -20 </td><td> -9.6 </td><td> 83.2 </td><td> 171.4 </td></tr></TBODY></TABLE>表二 For another example, if the fluid in the fluid tube 112 is oxygen, the difference between the reverse phase difference detected by the phase detecting unit 102 and the forward phase difference at the same temperature, the same concentration, and different flow rates of oxygen can be as follows. Second: <TABLE border="1" borderColor="#000000" width="_0003"><TBODY><tr><td> Flow (L/min) </td><td> 0 </td><td> 0.5 </td><td> 5 </td><td> 10 </td></tr><tr><td> original difference </td><td> -22.4 </td><td> - 12 </td><td> 80.8 </td><td> 169 </td></tr><tr><td> Corrected difference</td><td> -20 </td><td> -9.6 </td><td> 83.2 </td><td> 171.4 </td></tr></TBODY></TABLE> Table 2
其中，原差值代表原本儲存單元104所儲存的逆向相位差減去順向相位差的差值，在本實施例中，相位偵測單元102為在溫度30℃、氧氣濃度佔21%，且流量為零的量測條件下進行順向相位差與逆向相位差的量測。量測的結果為逆向相位差減去順向相位差的差值為-20，其與原本儲存單元104所儲存的逆向相位差減去順向相位差的差值相差2.4(-20-(-22.4)=2.4)，因此處理單元106便可將儲存單元104中其他溫度在20℃且氧氣濃度為21%的情形下不同流量所對應的逆向相位差減去順向相位差的差值皆加上2.4。以此類推，對應不同溫度、濃度以及不同流體的逆向相位差減去順向相位差的差值亦可以此方式校正。如此，處理單元106依據修正後的逆向相位差減去順向相位差的差值計算所得到的流體的濃度以及流量可更接近實際值，而有效地降低流體的量測誤差，提高流體量測的準確性。The original difference value represents the difference between the reverse phase difference and the forward phase difference stored in the original storage unit 104. In this embodiment, the phase detecting unit 102 has a temperature of 30 ° C and an oxygen concentration of 21%, and The measurement of the forward phase difference and the reverse phase difference is performed under the measurement condition that the flow rate is zero. The result of the measurement is that the difference between the reverse phase difference minus the forward phase difference is -20, which is different from the difference between the reverse phase difference stored by the original storage unit 104 minus the forward phase difference by 2.4 (-20-(- 22.4) = 2.4), so the processing unit 106 can add the difference between the reverse phase difference corresponding to the different flow rates and the forward phase difference in the case where the other temperature in the storage unit 104 is 20 ° C and the oxygen concentration is 21%. On 2.4. By analogy, the difference between the reverse phase difference of different temperatures, concentrations, and different fluids minus the forward phase difference can also be corrected in this way. In this way, the processing unit 106 calculates the concentration of the fluid and the flow rate according to the corrected reverse phase difference minus the difference of the forward phase difference, and the flow rate can be closer to the actual value, thereby effectively reducing the measurement error of the fluid and improving the fluid measurement. The accuracy.
圖2是依照本發明一實施例的一種超音波流體量測校正方法的流程示意圖，請參照圖2。由上述實施例可知，超音波流體量測裝置的校正方法可包括下列步驟。首先，於一量測條件下偵測第一超音波信號與第二超音波信號於流體管內傳遞時產生的相位差，以分別得到第一相位差與第二相位差(步驟S202)，其中第一超音波信號與第二超音波信號的傳遞方向相反，第一超音波信號的傳遞方向可例如與流體管內流體的量相同，第二超音波信號的傳遞方向則可例如與流體管內流體的量相反，另外量測條件可例如包括溫度、溼度、濃度、壓力、流體管形狀大小以及大氣壓力…等等。接著，依據第一相位差與第二相位差計算流體的流體特性(步驟S204)，其中流體的流體特性可例如為第一相位差與第二相位差的差值或和值。然後，將流體的流體特性與對應上述量測條件的流體特性資料進行比對(步驟S206)，舉例來說，可於流體管內的流體處於特定流量與特定濃度時，將在目前溫度、特定流量以及特定濃度下所計算出的流體的流體特性與對應目前溫度、特定流量以及特定濃度的流體特性資料進行比對。最後再依據比對結果校正流體特性資料(步驟S208)，例如依據比對結果校正對應目前溫度、特定流量以及特定濃度的流體特性資料，其中特定流量可例如為零或壓縮機可控制的最大流量，而流體特性資料可例如依據第一相位差與第二相位差的差值或和值進行校正。2 is a schematic flow chart of a method for correcting ultrasonic fluid measurement according to an embodiment of the present invention. Please refer to FIG. 2 . As can be seen from the above embodiments, the correction method of the ultrasonic fluid measuring device may include the following steps. First, detecting a phase difference generated when the first ultrasonic signal and the second ultrasonic signal are transmitted in the fluid tube under a measurement condition to obtain a first phase difference and a second phase difference, respectively (step S202), wherein The first ultrasonic signal is opposite to the second ultrasonic signal, and the first ultrasonic signal can be transmitted in the same direction as the fluid in the fluid tube, and the second ultrasonic signal can be transmitted, for example, in the fluid tube. The amount of fluid is reversed, and the additional measurement conditions may include, for example, temperature, humidity, concentration, pressure, fluid tube shape size, and atmospheric pressure, and the like. Next, the fluid characteristics of the fluid are calculated according to the first phase difference and the second phase difference (step S204), wherein the fluid property of the fluid may be, for example, a difference or sum of the first phase difference and the second phase difference. Then, the fluid characteristics of the fluid are compared with the fluid property data corresponding to the above-mentioned measurement conditions (step S206). For example, when the fluid in the fluid tube is at a specific flow rate and a specific concentration, it will be at the current temperature, specific. The flow rate and the fluid characteristics of the fluid calculated at a particular concentration are compared to the current characteristic temperature, the specific flow rate, and the fluid properties of the particular concentration. Finally, the fluid property data is corrected according to the comparison result (step S208), for example, according to the comparison result, the current characteristic, the specific flow rate, and the specific concentration of the fluid characteristic data are corrected, wherein the specific flow rate can be, for example, zero or a compressor-controllable maximum flow rate. And the fluid property data can be corrected, for example, based on a difference or sum of the first phase difference and the second phase difference.
綜上所述，本發明的實施例將依據計算得到的流體的流體特性與對應相同量測條件的流體特性資料進行比對，並依據比對結果校正流體特性資料，以降低流體的量測誤差，提高流體量測的準確性。In summary, the embodiment of the present invention compares the fluid characteristics of the calculated fluid with the fluid property data corresponding to the same measurement condition, and corrects the fluid property data according to the comparison result to reduce the measurement error of the fluid. Improve the accuracy of fluid measurement.
雖然本發明已以實施例揭露如上，然其並非用以限定本發明，任何所屬技術領域中具有通常知識者，在不脫離本發明的精神和範圍內，當可作些許的更動與潤飾，故本發明的保護範圍當視後附的申請專利範圍所界定者為準。Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any one of ordinary skill in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims.
100：超音波流體量測裝置 102：相位偵測單元 104：儲存單元 106：處理單元 108：溫度感測單元 110：壓縮機 112：流體管 T1、T2：信號收發端 P1：流入口 P2：流出口 S202~S208：超音波流體量測校正方法的流程步驟100: Ultrasonic fluid measuring device 102: Phase detecting unit 104: Storage unit 106: Processing unit 108: Temperature sensing unit 110: Compressor 112: Fluid tube T1, T2: Signal transmitting and receiving end P1: Inflow port P2: Flow Exit S202~S208: Process steps of the ultrasonic fluid measurement calibration method
圖1是依照本發明一實施例的一種超音波流體量測裝置的示意圖。 圖2是依照本發明一實施例的一種超音波流體量測校正方法的流程示意圖。1 is a schematic diagram of an ultrasonic fluid measuring device in accordance with an embodiment of the present invention. 2 is a schematic flow chart of a method for correcting ultrasonic fluid measurement according to an embodiment of the invention.
S202~S208：超音波流體量測校正方法的流程步驟S202~S208: Process steps of the ultrasonic fluid measurement calibration method
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