TWI403729B - Clamp meter for measuring voltage and current simultaneously and method for the same - Google Patents
Clamp meter for measuring voltage and current simultaneously and method for the same Download PDFInfo
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本發明係有關於一種量測電壓與電流之勾表及其方法，特別是一種可同時量測電壓與電流之勾表及其方法。 The invention relates to a hook gauge and a method thereof for measuring voltage and current, in particular to a hook gauge and a method thereof for simultaneously measuring voltage and current.
如同萬用電表(multimeter)一般，勾表(clamp meter)是常用的電子量測裝置。目前習知勾表存在著一個缺點，那就是無法同時(同步)量測待測物之電流與電壓；造成這種缺點的原因在於習知勾表內僅有一個類比數位轉換器在電流量測端及電壓量測端作切換；類比數位轉換器可能先切換在測量電壓端，以測得待測物之電壓值，接著再切換到量測電流端，以測得待測物之電流值。 Like a multimeter, a clamp meter is a commonly used electronic measuring device. At present, there is a shortcoming in the conventional hook list, that is, the current and voltage of the object to be tested cannot be measured simultaneously (synchronously); the reason for this disadvantage is that there is only one analog-to-digital converter in the current meter. The terminal and the voltage measuring end are switched; the analog digital converter may first switch to the measuring voltage end to measure the voltage value of the object to be tested, and then switch to the measuring current end to measure the current value of the object to be tested.
因此，當使用習知勾表同時量測一待測物之電壓與電流時，雖然習知勾表能顯示出電壓值與電流值，但實際上量測到的電壓值與電流值是有時間差的(因為類比數位轉換器的切換時間)，所以不能稱作是同步測量。而能夠精確同步量測一待測物之電壓值與電流值是非常重要的，例如當機器啟動瞬間電流會突然爬升而電壓會突然下降，此種瞬間現象若不是同步量測電壓與電流則會顯得不夠準確。 Therefore, when the voltage and current of a test object are simultaneously measured using a conventional hook table, although the conventional hook table can display the voltage value and the current value, the measured voltage value and the current value are actually time-difference. (Because of the switching time of the analog digital converter), it cannot be called a synchronous measurement. It is very important to be able to accurately measure the voltage value and current value of a test object. For example, when the machine starts up, the current will suddenly climb and the voltage will suddenly drop. If the instantaneous phenomenon is not synchronous measurement voltage and current, It is not accurate enough.
為改善上述習知技術之缺點，本發明之目的在於提供一種可同時量測電壓與電流之勾表，以準確同步量測一待測物之電壓與電流。 In order to improve the above disadvantages of the prior art, the object of the present invention is to provide a hook gauge capable of simultaneously measuring voltage and current to accurately measure the voltage and current of a test object.
為改善上述習知技術之缺點，本發明之另一目的在於提供一種使用勾表以同時量測電壓與電流之方法，以準確同步量測一待測物之電壓與電流。 In order to improve the above disadvantages of the prior art, another object of the present invention is to provide a method for simultaneously measuring voltage and current using a hook to accurately measure the voltage and current of a test object.
為達成本發明之上述目的，本發明之可同時量測電壓與電流之勾表包含一微控制器單元；一電流端類比數位轉換器單元，該電流端類比數位轉換器單元電連接至該微控制器單元；一電流量測單元，該電流量測單元電連接至該電流端類比數位轉換器單元；一電壓端類比數位轉換器單元，該電壓端類比數位轉換器單元電連接至該微控制器單元；及一電壓量測單元，該電壓量測單元電連接至該電壓端類比數位轉換器單元。 In order to achieve the above object of the present invention, the hook table for simultaneously measuring voltage and current of the present invention comprises a microcontroller unit; a current end analog to digital converter unit, the current end analog to digital converter unit being electrically connected to the micro a controller unit; a current measuring unit electrically connected to the current terminal analog converter unit; a voltage end analog converter unit, the voltage end analog converter unit electrically connected to the micro control And a voltage measuring unit electrically connected to the voltage terminal analog to digital converter unit.
為達成本發明之上述另一目的，本發明之使用勾表以同時量測電壓與電流之方法係應用於一勾表以量測一待測物；該方法包含：在該勾表中設置一電流端類比數位轉換器單元，該電流端類比數位轉換器單元電連接至該勾表之一微控制器單元及一電流量測單元；在該勾表中設置一電壓端類比數位轉換器單元，該電壓端類比數位轉換器單元電連接至該勾表之該微控制器單元及一電壓量測單元；該電流量測單元及該電壓量測單元同步量測該待測物之電流與電壓，以分別得到一電流量測信號與一電壓量測信號；該電流量測單元及該電壓量測單元分別同步傳送該電流量測信號與 該電壓量測信號至該電流端類比數位轉換器單元及該電壓端類比數位轉換器單元，以得到一數位電流信號與一數位電壓信號；及該電流端類比數位轉換器單元及該電壓端類比數位轉換器單元分別同步傳送該數位電流信號與該數位電壓信號至該微控制器單元。 In order to achieve the above other object of the present invention, the method for measuring voltage and current at the same time in the present invention is applied to a hook to measure a test object; the method includes: setting a check in the hook table a current-end analog-to-digital converter unit, the current-end analog-to-digital converter unit is electrically connected to a microcontroller unit and a current measuring unit of the hook table; a voltage-end analog-to-digital converter unit is disposed in the hook table, The voltage end analog-to-digital converter unit is electrically connected to the microcontroller unit and a voltage measuring unit of the hook table; the current measuring unit and the voltage measuring unit synchronously measure the current and voltage of the object to be tested, Obtaining a current measurement signal and a voltage measurement signal respectively; the current measurement unit and the voltage measurement unit respectively synchronously transmitting the current measurement signal and The voltage measurement signal is sent to the current terminal analog converter unit and the voltage terminal analog converter unit to obtain a digital current signal and a digital voltage signal; and the current end analog converter unit and the voltage terminal analogy The digital converter unit synchronously transmits the digital current signal and the digital voltage signal to the microcontroller unit.
10‧‧‧可同時量測電壓與電流之勾表 10‧‧‧Check the voltage and current simultaneously
20‧‧‧待測物 20‧‧‧Test object
102‧‧‧電流量測單元 102‧‧‧current measuring unit
104‧‧‧電壓量測單元 104‧‧‧Voltage measuring unit
106‧‧‧電流端類比數位轉換器單元 106‧‧‧ Current-side analog-to-digital converter unit
108‧‧‧微控制器單元 108‧‧‧Microcontroller unit
110‧‧‧電壓端類比數位轉換器單元 110‧‧‧Voltage-end analog-to-digital converter unit
112‧‧‧顯示單元 112‧‧‧Display unit
114‧‧‧電流量測信號 114‧‧‧ Current measurement signal
116‧‧‧電壓量測信號 116‧‧‧Voltage measurement signal
118‧‧‧數位電流信號 118‧‧‧Digital current signal
120‧‧‧數位電壓信號 120‧‧‧ digital voltage signal
S02~S14‧‧‧步驟 S02~S14‧‧‧Steps
第一圖為本發明之可同時量測電壓與電流之勾表方塊圖。 The first figure is a block diagram of the present invention for simultaneously measuring voltage and current.
第二圖為本發明之使用勾表以同時量測電壓與電流之方法流程圖。 The second figure is a flow chart of the method for measuring voltage and current at the same time using the hook table of the present invention.
請參考第一圖，其係為本發明之可同時量測電壓與電流之勾表方塊圖。本發明之可同時量測電壓與電流之勾表10係應用於一待測物20；該可同時量測電壓與電流之勾表10包含一電流量測單元102、一電壓量測單元104、一電流端類比數位轉換器單元106(例如為一快速高解析度類比數位轉換器)、一微控制器單元108、一電壓端類比數位轉換器單元110(例如為一快速高解析度類比數位轉換器)及一顯示單元112。 Please refer to the first figure, which is a block diagram of the present invention for simultaneously measuring voltage and current. The hook meter 10 for simultaneously measuring voltage and current of the present invention is applied to a test object 20; the hook 10 for simultaneously measuring voltage and current includes a current measuring unit 102, a voltage measuring unit 104, A current-side analog-to-digital converter unit 106 (for example, a fast high-resolution analog-to-digital converter), a microcontroller unit 108, and a voltage-side analog-to-digital converter unit 110 (for example, a fast high-resolution analog-to-digital converter) And a display unit 112.
該電流量測單元102係電連接至該待測物20及該電流端類比數位轉換器單元106；該電壓量測單元104係電連接至該待測物20及該電壓端類比數位轉換器單元110；該微控制器單元108係電連接至該電流端類比數位轉換器單元106、該電壓端類比數位轉換器單元110及該顯示單元112。 The current measuring unit 102 is electrically connected to the object to be tested 20 and the current-end analog converter unit 106; the voltage measuring unit 104 is electrically connected to the object to be tested 20 and the analog-to-digital converter unit of the voltage terminal The microcontroller unit 108 is electrically coupled to the current terminal analog converter unit 106, the voltage terminal analog converter unit 110, and the display unit 112.
該電流量測單元102及該電壓量測單元104同步量測該待測物20之 電流與電壓，以分別得到一電流量測信號114與一電壓量測信號116；該電流量測單元102及該電壓量測單元104分別同步傳送該電流量測信號114與該電壓量測信號116至該電流端類比數位轉換器單元106及該電壓端類比數位轉換器單元110，以得到一數位電流信號118與一數位電壓信號120；該電流端類比數位轉換器單元106及該電壓端類比數位轉換器單元110分別同步傳送該數位電流信號118與該數位電壓信號120至該微控制器單元108；該顯示單元112同時顯示該數位電流信號118與該數位電壓信號120之數值。 The current measuring unit 102 and the voltage measuring unit 104 synchronously measure the object to be tested 20 Current and voltage to obtain a current measurement signal 114 and a voltage measurement signal 116 respectively; the current measurement unit 102 and the voltage measurement unit 104 synchronously transmit the current measurement signal 114 and the voltage measurement signal 116, respectively. Up to the current-end analog-to-digital converter unit 106 and the voltage-side analog-to-digital converter unit 110 to obtain a digital current signal 118 and a digital voltage signal 120; the current-end analog digital converter unit 106 and the analog end analog digital The converter unit 110 synchronously transmits the digital current signal 118 and the digital voltage signal 120 to the microcontroller unit 108; the display unit 112 simultaneously displays the values of the digital current signal 118 and the digital voltage signal 120.
請參考第二圖，其係為 Please refer to the second picture, which is
首先，在該勾表中設置一電流端類比數位轉換器單元，該電流端類比數位轉換器單元電連接至該勾表之一微控制器單元及一電流量測單元(S02)；在該勾表中設置一電壓端類比數位轉換器單元，該電壓端類比數位轉換器單元電連接至該勾表之該微控制器單元及一電壓量測單元(S04)。 First, a current-end analog-to-digital converter unit is disposed in the hook table, and the current-end analog digital converter unit is electrically connected to one of the hook table and the current measuring unit (S02); A voltage-end analog-to-digital converter unit is disposed in the table, and the voltage-side analog-to-digital converter unit is electrically connected to the microcontroller unit and a voltage measuring unit of the hook table (S04).
接著，該電流量測單元及該電壓量測單元同步量測該待測物之電流與電壓，以分別得到一電流量測信號與一電壓量測信號(S06)；該電流量測單元及該電壓量測單元分別同步傳送該電流量測信號與該電壓量測信號至該電流端類比數位轉換器單元及該電壓端類比數位轉換器單元，以得到一數位電流信號與一數位電壓信號(S08)；該電流端類比數位轉換器單元及該電壓端類比數位轉換器單元分別同步傳送該數位電流信號與該數位電壓信號至該微控制器單元(S10)。 Then, the current measuring unit and the voltage measuring unit synchronously measure the current and voltage of the object to be tested to obtain a current measuring signal and a voltage measuring signal respectively (S06); the current measuring unit and the The voltage measuring unit synchronously transmits the current measuring signal and the voltage measuring signal to the current terminal analog bit converter unit and the voltage terminal analog bit converter unit to obtain a digital current signal and a digital voltage signal (S08 The current-end analog-to-digital converter unit and the voltage-side analog-to-digital converter unit synchronously transmit the digital current signal and the digital voltage signal to the microcontroller unit (S10), respectively.
最後，在該勾表中設置一顯示單元(S12)；該顯示單元同時顯示該數位電流信號與該數位電壓信號之數值(S14)。 Finally, a display unit (S12) is provided in the hook table; the display unit simultaneously displays the digital current signal and the value of the digital voltage signal (S14).
本發明之可同時量測電壓與電流之勾表及其方法係在勾表內設置兩個類比數位轉換器，以分別對應量測電流端及量測電壓端，故可同時(同步)量測待測物之電壓與電流；不似習知技術在欲同時量測待測物之電壓與電流時會有因僅單一類比數位轉換器故需在量測電流端及量測電壓端切換所造成之時間差。此外，請復參考第一圖，在一實際之實施方式中，可將該電流端類比數位轉換器單元106、該微控制器單元108及該電壓端類比數位轉換器單元110整合在一個晶片(chip)中，而其資料匯流排(data bus)係為同步。 The hook table and method for simultaneously measuring voltage and current of the invention are two analog digital converters arranged in the hook table to respectively measure the current end and the measuring voltage end, so that the measurement can be simultaneously (synchronized) The voltage and current of the object to be tested; unlike conventional techniques, when measuring the voltage and current of the object to be tested, there is a need for a single analog-to-digital converter to switch between the measuring current terminal and the measuring voltage terminal. The time difference. In addition, please refer to the first figure. In a practical implementation, the current-end analog-to-digital converter unit 106, the microcontroller unit 108, and the voltage-side analog-to-digital converter unit 110 can be integrated into one chip ( In chip), its data bus is synchronized.
綜上所述，當知本發明已具有產業利用性、新穎性與進步性，又本發明之構造亦未曾見於同類產品及公開使用，完全符合發明專利申請要件，爰依專利法提出申請。 In summary, it is known that the present invention has industrial applicability, novelty and advancement, and the structure of the present invention has not been seen in similar products and public use, and fully complies with the requirements of the invention patent application, and is filed according to the patent law.
10‧‧‧可同時量測電壓與電流之勾表 10‧‧‧Check the voltage and current simultaneously
20‧‧‧待測物 20‧‧‧Test object
102‧‧‧電流量測單元 102‧‧‧current measuring unit
104‧‧‧電壓量測單元 104‧‧‧Voltage measuring unit
106‧‧‧電流端類比數位轉換器單元 106‧‧‧ Current-side analog-to-digital converter unit
108‧‧‧微控制器單元 108‧‧‧Microcontroller unit
110‧‧‧電壓端類比數位轉換器單元 110‧‧‧Voltage-end analog-to-digital converter unit
112‧‧‧顯示單元 112‧‧‧Display unit
114‧‧‧電流量測信號 114‧‧‧ Current measurement signal
116‧‧‧電壓量測信號 116‧‧‧Voltage measurement signal
118‧‧‧數位電流信號 118‧‧‧Digital current signal
120‧‧‧數位電壓信號 120‧‧‧ digital voltage signal
Claims (5)
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| TW99118378A TWI403729B (en) | 2010-06-07 | 2010-06-07 | Clamp meter for measuring voltage and current simultaneously and method for the same |
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| Application Number | Priority Date | Filing Date | Title |
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| TW99118378A TWI403729B (en) | 2010-06-07 | 2010-06-07 | Clamp meter for measuring voltage and current simultaneously and method for the same |
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| Publication Number | Publication Date |
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| TW201144817A TW201144817A (en) | 2011-12-16 |
| TWI403729B true TWI403729B (en) | 2013-08-01 |
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Citations (5)
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|---|---|---|---|---|
| TW288114B (en) * | 1995-10-10 | 1996-10-11 | Microchip Tech Inc | Microcontroller with on-chip linear temperature sensor |
| TW294786B (en) * | 1995-09-11 | 1997-01-01 | Microchip Tech Inc | Digital trimming of on-chip analog components |
| US20050194521A1 (en) * | 2004-02-04 | 2005-09-08 | Shin Young-Ho | Optical pointing system and method for controlling power and/or clock signal thereof |
| TW200817978A (en) * | 2006-09-19 | 2008-04-16 | Atlab Inc | Optical pointing device and power supply semiconductor device therefor |
| TW200913501A (en) * | 2007-03-09 | 2009-03-16 | Atmel Corp | Minimizing offset error in analog to digital converter |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW294786B (en) * | 1995-09-11 | 1997-01-01 | Microchip Tech Inc | Digital trimming of on-chip analog components |
| TW288114B (en) * | 1995-10-10 | 1996-10-11 | Microchip Tech Inc | Microcontroller with on-chip linear temperature sensor |
| US20050194521A1 (en) * | 2004-02-04 | 2005-09-08 | Shin Young-Ho | Optical pointing system and method for controlling power and/or clock signal thereof |
| TW200817978A (en) * | 2006-09-19 | 2008-04-16 | Atlab Inc | Optical pointing device and power supply semiconductor device therefor |
| TW200913501A (en) * | 2007-03-09 | 2009-03-16 | Atmel Corp | Minimizing offset error in analog to digital converter |
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| TW201144817A (en) | 2011-12-16 |
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