201246794 、發明說明： 【發明所屬之技術領域】 本發明有關於車用發電機，特別是有關於車用發電機 之相位偵測裝置及其方法。 【先前技術】 車輛已成為現代人經常使用的交通工具之一，而車輛 内通常會配置發電機與電池(或電瓶）。發電機絲提供車輛 内之電子裝置的電力，電池(或電瓶)用以儲存啟動車輛所需 的電力及/或備用電力。例如，將使用石化燃料的引擎的動 能透過皮帶轉換為發錢較流信號，而此交流信號可再 透過整流電路儲存於電池(或電瓶）。 發電機通常是三相的交流發電機，且對應於每一個相 祕個相_測裝置，用以_發電機運轉所產生之 位與解。當發電機在低轉戟怠速時，發 區(:rmature)所輸出的相位信號是由娜 之=之電壓值的直流信號上。換句話說，發電璣 位信號為直流信號與交流信號 π =電壓值會隨不同整流元件之漏電流而有所 ㈣取流信號的電壓值不是—個固定值，所以必 =:?咖’以判斷發電機所產生之交流信號的頻 傳統的作法是將相位信號 直流信號的㈣值下降至接近 地的電阻’以使 較器擷取出交流信號。 ，、’然後’再以-個比 之電路“。乂1A是發電機中的傳統相位偵測裝置 之電路圖傳統相位偵難置1包括整流單元1〇、電阻13 4/14 201246794 、比較器15與低通滤波器Μ。相位信號端點phase_end用 以接收發電機其巾-個電樞所產生的她信號。相位信號 端點phaSe_end電性耦接至整流元件ι〇，且透過電阻13電 性轉接至接地端GND。比較器15的正輸人端電性搞接至相 位信號端點phaSe_end，而比較器15的負輸入端則接收參 考電壓Vref。比較益15白勺輸出端則透過低通濾波器14電 性耗接至傳統相位彳貞測裝置1的輸出端out。 整流單元〗0包括整流元件11與12，其中整流元件 11與12可以使用二極體來實現。整流元件u的輸入端 與整流tl件12的輸出端電性耦接相位信號端點 phase_end，而整流元件n的輸出端與整流元件12的輸 入端則分別電性耦接至電源之正端v+與負端v_。 比較器15會比較相位信號與參考電壓Vref的大小，並 據此輸出比較信號。傳統相位偵測裝置1的輸出端OUT還 可以電性耦接至一個運算單元(未繪示於圖1A),而且運算 單元可以根據比較信號的位準變化獲得發電機所產生之交 流k號的相位與頻率。 >低通濾波器14用以濾除比較信號之高頻雜訊，以避免 南頻雜訊造成偵測的錯誤。另外，低通濾波器14亦可以被 移除或者移至相位信號端點phase_end與比較器15的正 輸入端之間。 — 5月參照圖1B ’圖1B為帶有小振幅弦波的相位信號與 比較器所輪出的比較信號之波形圖。圖1B上半部的波形代 表相位^说端點Phase_end的相位信號，此相位信號帶有小 振幅弦波(亦即交流信號）。因為，直流信號的電壓值會隨不 同整流το件之漏電流而有所差異，因此，相位信號所對應 5/14 201246794 :波形曲線實質上會在圖1B上半部的兩條虛線中垂直平 圖1B下半部波形代表比較^ 為定值時，所輪出的比較信號，此時電壓值 會在圖-上半部的兩條虛:中=之= 參考電壓Vref需隨荖畫直十移故上述 號_裝置】將無法準確'地^獲得交動’否^目位信 另外’上述作法_二“5唬的相位與頻率。 尤其是在广成電瑕待機之漏電電流增加。 導致雷整f元件的漏電流會大幅上升，將 會有車輛===!_爾減少’且可能 【發明内容】 本發明實施例提供一種相 置用以偵測發電機之電樞輪置’此相位横測裝 置包括取樣保持電路與比較=2位k號，相位偵測裝 以及保持相位信號，並據此輸二寺電路用以取樣 值，其中丨不等於卜比較=時點，的相位信號 位信號值，並據此輸出比較信^比較時點w t|•，之相 本發明實施例提供一種相°档 機之電樞輸出之相位信號，用以谓測發電 。首先，獲得時點ti之相办ϋ貞測方法包括以下步驟 位信號值。獲得時點ti+i之相=值，且保持時點t,·之相 之相位信號值。比較時點。號值’且保持時點^ 得比較信號。 1、i+丨的相位信號值，以獲 6/14 201246794 其^實施例所提供的相位信號備測裝置及 且使用Γ來對相位信號進行分時取樣，並 使2 相位信號之前後時點的變化，故可以 的待機時間增加。 孝又低的值並使車輛之電瓶 附圖式僅係用來說明本發 "、斤 任何的限制。林u’而非對本發明的權利範圍作 【實施方式】 〔相位偵測裝置之實施例〕 凊參照圖2Α，圖2Α為本發明實施例之相位偵測 二路圖。相位偵观置2包括整流單元2〇、取樣保持^ 4、比較器25、低通濾波器23與26。 路 整流單元20包括整流元件21與22，整流單元2 1電性連接低通濾、波器23。整流元件21之第—^ 出碥）電性耦接至電源之正端ν+β整流元件22之第一= ^輪出端）電餘接至整流元件21之第二端(輸 ;:件22之第二端電性耦接至電源之負端％。低通J /态23之輸入端接收發電機電樞之相位信號，且带^ 耦接至整流元件21之第二端以及整流元件22之第二浐 。低通遽波器23之輸出端電性祕至取樣保持電路$ 山輸入it而取樣保持電路24之兩個輸出端（端點a =點b)分別電性搞接至比較器25之負輸人端與 端。比較器25之輸出端電性麵接至低通濾波器輪 7/14 201246794 入鳊。低通濾波器26之輸出端電性耦接至相位偵測裝 2的輸出端OUT。 低通濾、波器23用以濾除相位信號中的高頻雜訊，以 避免面頻雜訊所造成的偵測錯誤。同樣地，低通濾波器26 也用以濾、除比較器25所輸出之比較信號的高頻雜訊。然而 ’但本發明並不因此限定。f際上應用時，若高頻雜訊在 可以f文的範圍内，則低通濾波器23與26的至少其中 之可以被移除。若低通濾波器23與26同時被移除，則 取，保持電路Μ之輸人端會直接接收相位信號。同時，比 較器25之輸出刺可直接電性_至相位制裝置 此外’低通渡波器23與26可以是數位二 比遽波器’本發明並不限定低罐器‘與 ======= 的波形曲结昝;》, a丄 _此’相位h 5虎 移。圖2B下本㈣/圖2B "t半部之兩條虛線中垂直平 取樣保持電。;^代表比較器25所輪出的比較信號。 低通濾波的相位信號)用:::::二寺相位信號(或經過 所獲得的相位㈣值輝一段轉^^4可將取樣後 持電路24在日—ti對相位信號取樣例如，取樣保 相位信號值，且取樣保持電平二獲得，， 號值。當取樣保持電路24在時點=點⑽娜 樣後，取樣^ + a . 2對相位信號進行取 保持電路24透過端點a輪出時之相位 8/14 201246794 信號值以及透過端 器25。 出時點Q之相位信號值至比較 同樣地，取樣保持電路 又 :樣，端點a將所保:=:3對相位信銳進行 出至比較器25’以及透之相位信說值輪 h的相位信號值輪出至=將取樣後所獲得之 於後續時點的取樣與保持^ 25。取樣保持電略24對 迷。然而’本發明並不限=可以依此類推’故不再資 可以連續對複數個時 ；此’取樣保持電路2 得時點t,、㈣t3的位目=信號取樣，例如：連 :相位信號值’並依C保持每1時: 、序輪出相位信號值I比較器 另外’雖然本實祐如β °° 的取樣保持電路24為例^固定時點進行取樣與保持 可Μ採用非固定時點進❻此領域具有通常知旖 來實現相位谓剩褒置2。=樣與保持的取樣保待電路 里並非用以限定本發明。、而…取樣保持電路的類 本實施例中之比較、 比=可以比較正輪‘:=動電Μ比較器， 本福例之比較器c負輪入端的電堡差里 =較器25之正輪八端二， t並不因此限定。比較器电f接至端點b。然而，本 ::以互換’且比較器 之正輪入端以及負輸入 =相反的信號。本技術‘且:互換後，比較器25 '、貫施方式，在此不再贅τ 通#知識者應可推 請繼續同時參照圖2Α^2β 萄取樣保持電路 9/14 « 201246794 24獲得時點k之相位信號值後，比較器25用以比較時 點t,與&之相位信號值，並據此輸出比較信號來表示時 點幻與h之相位信號值之差異。換句話說，比較器25 比較取樣保持電路24所輸出不同時點的相位信號值， 並據此輸出比較信號，其中比較信號係用以表示前後時 點相位彳§號之差異。同樣地，當取樣保持電路24獲得 時點t3的相位信號值後，比較器25用以比較時點丨2與 ts之相位尨號值，並據此輸出比較信號來表示時點t2與 h之相位信號值的差異。比較器25於後續時點所輸出的 比較信號可以依此類推，故不再贅述。 _之後，比較器25輸出的比較信號經過低通濾波器2| 輸出至相位細彳裝置2的輸出端⑻τ。相位制裝置2《 輸?ί 〇UT可以電性麵接至運算單元(未繪示於圖2A}，J 以依據相位偵測裝置2的輸出端⑽之娜 準义匕传知交流錢或相健號_位與頻率。 〔相位偵測方法之實施例〕 -月參照圖3，圖3為本發明實施 程圖。相位制方法機1^== 位信號的相位料率，日μ +，㈣找所輸出之相 位㈣番Z .述相位偵測方法可以透過相 偵辦J可、車人、靭體或硬體電路來實現，其中相位 貞測装置可以例如是相位偵測裝置2。 相位偵測方法包括以 ,^ ^下^驟。首先，在步驟S31中 /又疋义數1之初始值，初始值例如為在步 驟S32中，獲得時點t '然後’在步 相位信號值。接下來，以 時點^之 接下來，在步驟S33中，獲得時點“之 10/14 201246794 相位信號值，且保持時點t 再來，在步驟S34中，M ^信號值。 值，以獲得比較信號，其中比較=與h之相位信號 以表示交流信號或相位信說的相=的位準變化可以用 比可以給後端的運算電°據此’上述 信號或相位信號的相位與頻率。、订處理，以獲得交流 然後，在步驟S35中，於 否結束偵測。接下來， 若不結：：：較信號後’判斷是 在步驟S36巾，則將更新變、料仃步驟S36 數1增加1(亦即i=i+1)，缺 、數值，例如，將變 然而，實際上應用時行步驟如。 。故可在步驟S32之前，將/旎帶有高頻雜訊 ，且可在步驟S34後，將比較信=中^高頻雜訊據除 〔實施例的可能功效〕 &的咼頻雜訊濾除。 根據本發明實施例，上述的 ^取樣保持電路來對相位信號4=置及其方 :比較器來偵測相位信號二：取:，並且使 偵測裝置所耠屮沾^ 寸”..占的茭化，故相位信號 化的残'紹§號可以不受直流信號之電麼值變 4 :日、，°此’將可以使車輛之電瓶的漏電流保持在較 • : /並使車輛的電瓶的待機時間增加 。另外，所述相 位k號裝置可以不需對發電機的每一個電樞的相位信號做 =。’故電路元件的數量、設計複雜度與成本部可以因此 以上所述僅為本發明之實施例，其並非用以侷限本發 明之專利範圍。 11/14 201246794 【圖式簡單說明】 圖1A疋發電機中的傳統相位偵測裝置之電路圖。 圖1B為帶有小振幅弦波的相位信號與比較器所輸出 的比較信號之波形圖。 圖2A為本發明實施例之相位偵測裝置之電路圖。 圖2B為本發明實施例之相位信號以及比較器所輸出 的比較信號之波形圖。 圖3為本發明實施例之相位偵測方法之流程圖。 【主要元件符號說明】 I :傳統相位偵測裝置 2:相位偵測裝置 10、20 :整流單元 II ' 12 ' 21 ' 22 :整流元件 13 :電阻 GND :接地端 14、 23、26 :低通濾波器 24 :取樣保持電路 15、 25 :比較器 S31〜Sf36 :步驟流程 12/14201246794, DISCLOSURE OF THE INVENTION [Technical Field] The present invention relates to a vehicle generator, and more particularly to a phase detecting device for a vehicle generator and a method therefor. [Prior Art] Vehicles have become one of the vehicles that modern people often use, and generators and batteries (or batteries) are usually arranged in vehicles. The generator wire provides power to the electronics within the vehicle, and the battery (or battery) is used to store the power and/or backup power required to start the vehicle. For example, the kinetic energy of an engine using fossil fuels is converted into a flow-sending signal through a belt, and the AC signal can be stored in a battery (or battery) through a rectifying circuit. The generator is usually a three-phase alternator and corresponds to each phase-by-phase phase-to-measure device for the position and solution generated by the generator operation. When the generator is at low idling speed, the phase signal output by the rmature is the dc signal of the voltage value of 娜=. In other words, the power generation clamp signal is a DC signal and the AC signal π = the voltage value will vary with the leakage current of different rectifier components. (4) The voltage value of the current signal is not a fixed value, so it must be =: The conventional method of judging the AC signal generated by the generator is to reduce the (four) value of the phase signal DC signal to a resistance close to ground 'to make the comparator extract the AC signal. , 'then' and then - the ratio of the circuit ". 乂 1A is the circuit diagram of the traditional phase detection device in the generator. The traditional phase detection device includes a rectifier unit 1 电阻, resistor 13 4/14 201246794, comparator 15 And the low-pass filter Μ. The phase signal end phase_end is used to receive the signal generated by the generator's armature-armature. The phase signal end point phaSe_end is electrically coupled to the rectifying element ι〇, and is electrically connected through the resistor 13 Transfer to the ground GND. The positive input terminal of the comparator 15 is electrically connected to the phase signal terminal phaSe_end, and the negative input terminal of the comparator 15 receives the reference voltage Vref. The output of the comparator 15 is low. The pass filter 14 is electrically depleted to the output terminal out of the conventional phase detecting device 1. The rectifying unit 0 includes rectifying elements 11 and 12, wherein the rectifying elements 11 and 12 can be implemented using a diode. The input end is electrically coupled to the output end of the rectifying element 12 and the phase end phase_end, and the output end of the rectifying element n and the input end of the rectifying element 12 are electrically coupled to the positive end v+ and the negative end v_ of the power supply, respectively. Comparator 15 compares the phase The signal and the reference voltage Vref are outputted, and the comparison signal is output accordingly. The output terminal OUT of the conventional phase detecting device 1 can also be electrically coupled to an arithmetic unit (not shown in FIG. 1A), and the arithmetic unit can be compared according to The level change of the signal obtains the phase and frequency of the AC k generated by the generator. > The low pass filter 14 is used to filter out the high frequency noise of the comparison signal to avoid detection errors caused by the south frequency noise. In addition, the low pass filter 14 can also be removed or moved between the phase signal end phase_end and the positive input of the comparator 15. - May reference to Figure 1B 'Figure 1B is a phase signal with a small amplitude sine wave A waveform diagram of the comparison signal rotated by the comparator. The waveform of the upper half of Fig. 1B represents the phase signal of the phase end phase Phase_end, which has a small amplitude sine wave (ie, an alternating current signal). The voltage value of the signal will vary with the leakage current of different rectifiers. Therefore, the phase signal corresponds to 5/14 201246794: the waveform will be substantially perpendicular to the two dotted lines in the upper half of Figure 1B. Half wave On behalf of the comparison ^ is the fixed value, the comparison signal that is rotated, the voltage value will be in the upper part of the graph - the upper part of the virtual: medium = = the reference voltage Vref needs to be drawn with the straight ten, so the above number_device 】 will not be able to accurately 'acquisition ^ to get the 'no ^ position letter of the other 'the above method _ two '5 唬 phase and frequency. In particular, the leakage current in the standby of Guangcheng Electric Co., Ltd. increases. As a result, the leakage current of the lightning element will rise sharply, and there will be a vehicle ===!__reduced' and possibly [invention] The present invention provides an armature wheeling for detecting the generator. The phase cross-measuring device comprises a sample-and-hold circuit and a comparison=2 digit k number, a phase detection device and a hold phase signal, and according to the transmission, the second temple circuit is used for sampling values, wherein the phase signal is not equal to the comparison value = time point. The bit signal value, and according to the output comparison signal comparison time point wt|•, the phase of the present invention provides a phase signal of the armature output of the phase gear for predicting power generation. First, the method for obtaining the phase point ti includes the following step signal values. The phase value of the phase ti+i is obtained, and the phase signal value of the phase at the time t,· is maintained. Compare time points. The value 'and the hold point ^ are compared to the signal. 1. The phase signal value of i+丨 is obtained by the phase signal preparation device provided by the embodiment of 6/14 201246794, and the phase signal is time-sampling using Γ, and the change of the 2 phase signal before and after the time point is obtained. Therefore, the standby time can be increased. The low value of filial piety and the battery of the vehicle are only used to illustrate the limitations of this hair. [Embodiment] [Embodiment of Phase Detection Apparatus] Referring to FIG. 2A, FIG. 2A is a phase detection two-way diagram of an embodiment of the present invention. The phase detection set 2 includes a rectifying unit 2A, a sample hold unit 4, a comparator 25, and low pass filters 23 and 26. The path rectifying unit 20 includes rectifying elements 21 and 22, and the rectifying unit 21 is electrically connected to the low pass filter and the waver 23. The first end of the rectifying element 21 is electrically coupled to the positive end of the power supply ν + β first rectifying element 22 = ^ wheel end) is electrically connected to the second end of the rectifying element 21 (transmission; The second end of the second end is electrically coupled to the negative terminal of the power supply. The input end of the low pass J / state 23 receives the phase signal of the generator armature, and is coupled to the second end of the rectifying element 21 and the rectifying element 22 The second end of the low-pass chopper 23 is electrically connected to the sample-and-hold circuit $mount input and the two outputs of the sample-and-hold circuit 24 (end point a = point b) are electrically connected to each other. The negative input end and the end of the comparator 25. The output end of the comparator 25 is electrically connected to the low pass filter wheel 7/14 201246794. The output of the low pass filter 26 is electrically coupled to the phase detection device. Output terminal OUT of 2. Low-pass filter and wave filter 23 are used to filter high-frequency noise in the phase signal to avoid detection errors caused by surface-frequency noise. Similarly, low-pass filter 26 is also used. The high frequency noise of the comparison signal outputted by the comparator 25 is filtered. However, the present invention is not limited thereto. If the application is applied to the f, the high frequency noise can be f. Within the scope of the text, at least one of the low pass filters 23 and 26 can be removed. If the low pass filters 23 and 26 are simultaneously removed, the input terminal of the hold circuit will receive the phase signal directly. At the same time, the output of the comparator 25 can be directly electrically _ to the phase device. In addition, the 'low pass wavers 23 and 26 can be a digital two-rhopper chopper'. The present invention does not limit the low canister' with ==== === The waveform of the curve 昝;", a丄_This 'phase h 5 tiger shift. Figure 2B below (4) / Figure 2B "t half of the two dotted lines in the vertical flat sample to maintain electricity; ^ represents a comparison The comparison signal rotated by the device 25. The low-pass filtered phase signal) uses the ::::: two-chamber phase signal (or the obtained phase (four) value is turned up to ^^4, and the sampled holding circuit 24 can be used in the day. - ti samples the phase signal, for example, the sampled phase-preserving signal value, and the sample-and-hold level 2 is obtained, the value of the value. When the sample-and-hold circuit 24 is at the time point = point (10), the sample is sampled + + a. 2 is performed on the phase signal Take the phase 8/14 201246794 signal value when the holding circuit 24 is rotated through the end point a and the phase of the transmissive terminal 25. The signal value is similarly the same, the sample-and-hold circuit is again: the end point a will guarantee: =: 3 pairs the phase signal sharp out to the comparator 25' and the phase signal value of the phase signal value wheel h is rotated To = sample and hold after the sampling is taken at the subsequent point of time. 25. The sample is kept at a minimum of 24 pairs. However, 'the invention is not limited to = can be deferred', so that no more than one can continue to be plural; This 'sampling and holding circuit 2 has time point t, (4) t3 bit = signal sampling, for example: even: phase signal value ' and keeps every 1 hour according to C:, sequence round out phase signal value I comparator separately 'although For example, the sample-and-hold circuit 24 of β °° is used for sampling and holding at a fixed time point. It is possible to use a non-fixed point to achieve the phase-present state 2 in the field. The sample and hold circuit of the sample and hold is not intended to limit the invention. And the comparison of the sampling and holding circuit in this embodiment, the ratio = can compare the positive wheel ': = the electric current Μ comparator, the comparator b of the negative example of the electric wheel difference of the negative wheel input = comparator 25 The round is eight-end two, t is not limited. The comparator is electrically connected to terminal b. However, this :: is interchanged' and the positive wheel input of the comparator and the negative input = the opposite signal. The technology 'and: after the interchange, the comparator 25 ', the implementation method, no longer 赘 通 # 知识 知识 知识 知识 知识 知识 知识 知识 知识 知识 知识 知识 知识 知识 知识 知识 知识 知识 知识 知识 知识 知识 知识 知识 知识 知识 知识 2 β β β β β β β 9 9 9 9 9 9 9 After the phase signal value of k, the comparator 25 compares the phase point t, the phase signal value with & and outputs a comparison signal to represent the difference between the phase signal value of the time point and the phase signal of h. In other words, the comparator 25 compares the phase signal values outputted by the sample and hold circuit 24 at different points in time, and outputs a comparison signal based thereon, wherein the comparison signal is used to indicate the difference between the front and rear time points 彳§. Similarly, when the sample and hold circuit 24 obtains the phase signal value at the time point t3, the comparator 25 compares the phase 尨 values of the time points 丨2 and ts, and outputs a comparison signal to represent the phase signal values of the time points t2 and h. The difference. The comparison signal output by the comparator 25 at the subsequent time point can be deduced by analogy, and will not be described again. After _, the comparison signal output from the comparator 25 is output to the output terminal (8) τ of the phase fine-tuning device 2 via the low-pass filter 2|. The phase making device 2 "transmission" can be electrically connected to the arithmetic unit (not shown in Fig. 2A), and J is used to communicate the money or phase according to the output of the phase detecting device 2 (10). [Healthy number_bit and frequency. [Embodiment of phase detection method] - month refers to Fig. 3, Fig. 3 is an implementation diagram of the present invention. Phase system method 1^== phase signal rate of bit signal, day μ +, (4) Find the phase of the output (4). The phase detection method can be realized by the phase detector, the driver, the firmware or the hardware circuit. The phase detection device can be, for example, the phase detection device 2. Phase detection The method includes the following steps: First, in step S31, the initial value of the number 1 is, for example, in step S32, the time point t 'and then the step phase signal value is obtained. Next, Next, in step S33, the time point "10/14 201246794 phase signal value is obtained, and the time point t is held again, in step S34, the M^ signal value. The value is obtained to obtain a comparison signal, wherein comparison = phase signal with h to indicate the level change of the phase of the alternating signal or phase signal It is possible to use a comparison with the phase and frequency of the above signal or phase signal, and to process the processing to obtain the AC. Then, in step S35, the detection is ended. Next, if not: :: After the signal is judged, it is judged at step S36, then the update will be changed, and the number of steps S36 is increased by 1 (i.e., i=i+1). The missing value, for example, will change, however, when actually applied The steps may be as follows: before step S32, the high frequency noise may be transmitted with /, and after step S34, the comparison signal = middle frequency high frequency noise may be excluded [the possible effects of the embodiment] & According to an embodiment of the invention, the above-mentioned sampling and holding circuit pairs the phase signal 4= and the comparator: the comparator detects the phase signal 2: takes: and causes the detecting device to smash屮 ^ 寸 . 占 占 占 占 占 占 占 占 占 占 占 占 占 占 占 占 占 占 占 相位 相位 相位 相位 相位 相位 相位 相位 相位 相位 相位 相位 相位 相位 相位 相位 相位 相位 相位 相位 相位 相位 相位 相位 相位 相位 相位 相位In comparison with : : / and increase the standby time of the battery of the vehicle. In addition, the phase k device can It is necessary to make a phase signal for each armature of the generator. Therefore, the number of circuit components, the design complexity and the cost portion can be only described as an embodiment of the present invention, which is not intended to limit the patent of the present invention. Scope 11/14 201246794 [Simple diagram of the diagram] Figure 1A is a circuit diagram of a conventional phase detection device in a generator. Figure 1B is a waveform diagram of a phase signal with a small amplitude sine wave and a comparison signal output by a comparator. 2A is a circuit diagram of a phase detecting device according to an embodiment of the present invention. FIG. 2B is a waveform diagram of a phase signal and a comparison signal output by a comparator according to an embodiment of the present invention. FIG. 3 is a phase detecting method according to an embodiment of the present invention. Flow chart. [Description of main component symbols] I: Conventional phase detection device 2: Phase detection device 10, 20: Rectifier unit II ' 12 ' 21 ' 22 : Rectifier component 13 : Resistor GND : Ground terminal 14 , 23 , 26 : Low pass Filter 24: Sample and Hold Circuit 15, 25: Comparators S31 to Sf36: Step Flow 12/14