201237431 六、發明說明： 【發明所屬之技術領域】 本發明係關於一種檢測電氣設備之地線是否斷開之地 線檢測裝置及其方法，特別是一種提供及時告知且可同時 降低電氣設備之漏電壓之地線檢測裝置及其方法。 【先前技術】 一般市售電器產品為防止因設備絕緣劣化或損壞等因 素所引起之漏電現象，通常會於電氣設備上設有接地線， 以使其產生之漏電流可以及時被導入大地，排除因漏電而 產生之觸電危險。目前大多的電器產品所使用之接地線大 多具有長時間負載高電流的能力，然而，在不斷地使用磨 損或地線品質較差之情形下，產品之地線亦有可能發生斷 裂或產生接觸不良的狀況，因而導致使用者有引發觸電的 可能。 一般而言，在測試一項電氣設備有無接地時，會進行 所明的接地連續性測試(Ground Continuity Test)，其方式通 吊係利用—萬用電錶或電流器來進行檢測，惟以如此的檢 測方式必須隨時注意量測的阻抗值，且無法第一時間及時 地告知使用者，使使用者仍有可能冒著已經漏電的危險操 作設備’如此，將嚴重威脅使用者的安全及影響設備的使 用。 因此’務必需有一種可以檢測地線斷開之檢測裝置， 用以及時告知使用者，其所使用之設備地線已斷開。 【發明内容】 201237431 本發明之主要目的係在提供一種檢測電氣設備地線斷 開之檢測裝置。 本發明之另一主要目的係在提供一種地線斷開檢測方 法，用以檢測電氣設備之地線是否正常。 為達成上述之目的，本發明提供一種地線檢測裝置， 係用於測試至少一電氣設備，且該電氣設備具有第一端及 第二端，其中該第二端用以接地。本發明之地線檢測裝置 包括一電源供應器、至少一開關元件、至少一第一提示單 元、至少一檢測單元。電源供應器用以提供電流。開關元 件電性連接電源供應器，用以控制電流輸入。第一提示單 元用以提示使用者電氣設備之地線是否正常接地，其具有 第一正端與第一負端，其中第一正端係電性連接開關元 件，而第一負端接地。檢測單元包括一第一檢測端與一第 二檢測端，其中第一檢測端與開關元件電性連接，其係用 以連接第一端，第二檢測端電性連接第一負端，用以連接 第二端。於本發明之實施例中，地線檢測裝置更包括至少 一第二提示單元與至少一旁路元件。第二提示單元具有第 二正端與第二負端，其中第二正端電性連接開關元件，第 二負端電性連接第一正端。旁路元件電性連接於第一正端 與第一負端，係用以提供電流流向路徑，藉以分散流向第 一提示單元之電流，避免因提供電流過大而損壞第一提示 單元。利用上述之構造，藉由第一提示單元是否作用，以 判斷電氣設備之第二端是否正常接地，若第一提示單元發 生作用，即表示第二端沒有接地。 本發明之地線斷開檢測方法係應用於如前所述之檢測 裝置，該方法包括以下步驟：提供一電源供應器，以供產 201237431 生一電流；提供至少一開關元件，用以電性連接電源供應 器；使一檢測單元之一第一檢測端連接第一端，並使檢測 單元之一第二檢測端連接第二端；使至少一第一提示單元 之一第一正端電性連接開關元件，並使第一提示單元之一 第一負端接地；提供至少一旁路元件，並使旁路元件電性 連接第一正端與第一負端；提供至少一第二提示單元，並 使第二提示單元之一第二正端電性連接開關元件，第二提 示單元之一第二負端電性連接第一正端，·以及開啟開關元 件，以使電流流經檢測單元；藉由第一提示單元是否作用， 判斷電流是否通過電氣設備，藉以檢測第二端是否正常接 地，其中若第一提示單元發生作用，則表示第二端沒有接 地。 【實施方式】 為讓本發明之上述和其他目的、特徵和優點能更明顯 易懂，下文特舉出本發明之具體實施例，並配合所附圖式， 作詳細說明如下。 以下請一併參考圖1及圖2a、2b。圖1係關於本發明 之檢測地線是否斷開之地線檢測裝置之第一實施例之架構 圖。圖2a及2b係分別為本發明之地線檢測裝置於電氣設 備之地線於正常下及異常下之工作示意圖。 如第1圖所示，在本發明之地線檢測裝置之第一實施 例中，地線檢測裝置1包括電源供應器10、開關元件20、 第一提示單元30、檢測單元40、第二提示單元50及旁路 元件60。 電源供應器10用以提供電流。於本發明之一實施例 201237431 中，電源供應器10為12伏特(v〇lt)2乾電池，惟本發明I 不以此為限。 開關元件20係與電源供應器1〇電性連接，用以控制 電流輸入。於本發明之一實施例中，開關元件2〇可為一種 可控式之開關，以提供使用者操作。 第一提示單元30包括—第一正端3〇1與一第一負端 302 ’且該第一負端302接地。於本發明之一實施例中，第 一提示單元30更包括有一 LED燈與蜂鳴器（圖未示）(3ΐνΕΠ) 燈係提供使用者視覺上之提示效果，而蜂鳴器係用以提供 使用者聽覺上之提示，藉由二者搭配使用，當電氣設備90 有所異常時’此時無論使用者係在強光下或是噪音的環境 中使用，仍可立即清楚地知悉。 檢測單元40包括第一檢測端41與第二檢測端42。第 一檢測端41係與開關元件20電性連接，其用以連接待測 之電氣設備90之第一端91。第二檢測端42電性連接第一 負端302 ’用以連接電氣設備90之第二端92。201237431 VI. Description of the Invention: [Technical Field] The present invention relates to a ground detecting device and method for detecting whether a grounding of an electrical device is disconnected, and more particularly, a method for providing timely notification and simultaneously reducing leakage of electrical equipment Voltage ground detection device and method therefor. [Prior Art] Generally, commercially available electrical products are designed to prevent leakage due to factors such as deterioration or damage of equipment insulation. Usually, a grounding wire is provided on the electrical equipment so that the leakage current generated can be introduced into the earth in time to eliminate Risk of electric shock due to electric leakage. At present, most of the grounding wires used in electrical products have the ability to load high current for a long time. However, in the case of continuous use of wear or poor ground quality, the ground wire of the product may be broken or poorly contacted. The situation, thus causing the user to have the possibility of causing electric shock. In general, when testing an electrical device for grounding, the grounding continuity test (Ground Continuity Test) is performed. The method is to use a universal meter or a current device for detection. The detection method must pay attention to the measured impedance value at any time, and it is impossible to inform the user in time for the first time, so that the user may still risk the dangerous operation of the device that has leaked electricity. [This will seriously threaten the safety of the user and affect the equipment. use. Therefore, it is necessary to have a detecting device capable of detecting the disconnection of the ground wire, and to inform the user in time that the ground wire of the device used has been disconnected. SUMMARY OF THE INVENTION 201237431 The main object of the present invention is to provide a detecting device for detecting a grounding of an electrical device. Another main object of the present invention is to provide a ground disconnection detecting method for detecting whether the ground of an electrical device is normal. To achieve the above object, the present invention provides a ground wire detecting device for testing at least one electrical device, the electrical device having a first end and a second end, wherein the second end is for grounding. The ground detecting device of the present invention comprises a power supply, at least one switching element, at least one first prompting unit, and at least one detecting unit. A power supply is used to supply current. The switching element is electrically connected to the power supply to control the current input. The first prompting unit is configured to prompt the user whether the grounding of the electrical device is normally grounded, and has a first positive end and a first negative end, wherein the first positive end is electrically connected to the switching element, and the first negative end is grounded. The detecting unit includes a first detecting end and a second detecting end. The first detecting end is electrically connected to the switching element, and is connected to the first end, and the second detecting end is electrically connected to the first negative end. Connect the second end. In an embodiment of the invention, the ground line detecting device further includes at least one second prompting unit and at least one bypass element. The second prompting unit has a second positive end and a second negative end, wherein the second positive end is electrically connected to the switching element, and the second negative end is electrically connected to the first positive end. The bypass element is electrically connected to the first positive end and the first negative end to provide a current flow path for dispersing the current flowing to the first prompting unit to prevent damage to the first prompting unit due to excessive current supply. With the above configuration, whether the second end of the electrical device is normally grounded is determined by whether the first prompting unit is active or not. If the first prompting unit functions, the second terminal is not grounded. The ground disconnection detecting method of the present invention is applied to the detecting device as described above, the method comprising the steps of: providing a power supply for generating a current of 201237431; providing at least one switching element for electrical Connecting a power supply; connecting a first detecting end of a detecting unit to the first end, and connecting a second detecting end of the detecting unit to the second end; and making the first positive end of the at least one first prompting unit Connecting the switching element and grounding the first negative terminal of the first prompting unit; providing at least one bypassing component, and electrically connecting the bypassing component to the first positive end and the first negative terminal; providing at least one second prompting unit, And electrically connecting the second positive end of the second prompting unit to the switching element, the second negative end of the second prompting unit is electrically connected to the first positive end, and the switching element is turned on to enable current to flow through the detecting unit; Whether the current is passed through the electrical device by the first prompting unit, whether the second end is normally grounded, and if the first prompting unit acts, the second end is not grounded. . The above and other objects, features, and advantages of the present invention will become more apparent from the description of the appended claims. Please refer to Figure 1 and Figures 2a and 2b below. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a block diagram showing a first embodiment of a ground detecting device for detecting whether or not a ground wire is broken in accordance with the present invention. 2a and 2b are schematic views showing the operation of the ground detecting device of the present invention on the ground of the electrical device under normal and abnormal conditions, respectively. As shown in FIG. 1, in the first embodiment of the ground detecting device of the present invention, the ground detecting device 1 includes a power supply 10, a switching element 20, a first prompting unit 30, a detecting unit 40, and a second prompt. Unit 50 and bypass element 60. The power supply 10 is used to supply current. In one embodiment of the present invention 201237431, the power supply 10 is a 12 volt (2 volt) dry battery, but the invention I is not limited thereto. The switching element 20 is electrically connected to the power supply 1 to control the current input. In one embodiment of the invention, the switching element 2A can be a controllable switch to provide user operation. The first prompting unit 30 includes a first positive terminal 3〇1 and a first negative terminal 302' and the first negative terminal 302 is grounded. In an embodiment of the present invention, the first prompting unit 30 further includes an LED light and a buzzer (not shown) (3ΐνΕΠ), and the light system provides a visual effect of the user, and the buzzer is provided. The user's audible prompt, when used in combination with the two, when the electrical device 90 is abnormal, 'when the user is used under strong light or in a noisy environment, it can be immediately and clearly understood. The detecting unit 40 includes a first detecting end 41 and a second detecting end 42. The first detecting end 41 is electrically connected to the switching element 20 for connecting the first end 91 of the electrical device 90 to be tested. The second detecting end 42 is electrically connected to the first negative end 302' for connecting the second end 92 of the electrical device 90.
第二提示單元50係包括第二正端51與第二負端52， 其用以提示使用者地線檢測裝置1是否正常作用，其中第 二正端51電性連接開關元件20，且第二負端52係電性連 接於第一正端301，藉此，當使用者啟動開關元件20，並 且在電源供應器10為正常作用時，該電源供應器10所提 供之電流便可流經第二提示單元50而使其發生作用，以告 知使用者地線檢測裝置1為正常作用狀態。於本發明之一 實施例中’第二提示單元50包括一 LED燈與蜂鳴器（圖未 示），並且第二提示單元50之LED燈可與第一提示單元30 所使用之LED燈有所不同，例如第一提示單元30之LED 201237431 燈為紅色，第二提示單元50為綠色，但本發明並不以此為 限。同樣地，第二提示單元50之蜂鳴器與第一提示單元 30之蜂鳴器可設計為兩種聲音不同之蜂鳴器，以便於讓使 用者能區辨，但本發明並不以此為限。 旁路元件60係分別與第一正端301及第一負端302電 性連接，其用以提供電流流向路徑，藉以分散流向第一提 示單元30之電流，避免因提供電流過大而損壞第一提示單 元30。在本發明之一實施例中，旁路元件60為一電容器。 請繼續參考圖2a及圖2b，並同時繼續參考圖1。一般 而言，電氣設備90為避免漏電流產生，會將其第二端92(即 所謂接地端）接地。而當地線檢測裝置1之第一檢測端41 與第二檢測端42分別連接至電氣設備90之第一端91與第 二端92時，於地線正常接地之情況下，由於電氣設備90 與大地為導通狀態，因此當開關元件20啟動後，電流便會 流經過電氣設備90(如圖2a所示）而與地線檢測裝置1形成 一迴路，此時第一提示單元30因為沒有電流通過，因此不 會發生作用。反之，若在電氣設備90接地異常之情況下， 由於電氣設備90與大地之間為斷路，故電流將改變流向而 流經第一提示單元30，此時第一提示單元30便會發生作 用，以提示使用者電氣設備90之地線已經斷開。本發明之 地線檢測裝置1之優點除了可即時提示使用者關於電氣設 備90之接地狀態外，更可以將設備地線斷開後所產生之漏 電流導入大地(如圖2b所示），因此可降低使用者誤觸漏電 之危險。 接著參考圖3,為本發明之地線檢測裝置之第二實施例 之架構圖。於本發明之地線檢測裝置之第二實施例中，地 201237431 線檢測裝置la包括電源供應器10(圖未示）、複數個開關元 件20、複數個第一提示單元30、複數個檢測單元40(圖未 示）、複數個第二提示單元50及複數個旁路元件60。如圖 3所示，由於地線檢測裝置1 a是由上述第一實施例之地線 檢測裝置1所並聯而成，因而可同時檢測多個電氣設備 90。需注意的是，於本發明之一實施例中，地線檢測裝置 la可以一個電源供應器10提供予多組第一提示單元30及 第二提示單元50使用，惟本發明並不以此為限。由於本發 明之第二實施例之地線檢測裝置la之元件之功能及連接 關係與上述第一實施例之地線檢測裝置1相同，故在此不 多作贅述。 請參考圖4,為本發明之地線檢測裝置之第三實施例 之架構圖。本發明之第三實施例之地線檢測裝置lb亦可用 以同時檢測多個電氣設備90，惟其與上述第二實施例之檢 測裝置la不同的是，地線檢測裝置lb係以一個開關元件 20同時控制兩組第一提示單元30及第二提示單元50，以 減少開關元件20之使用，藉此可大幅降低製作上之成本， 且當其中之一組提示單元發生故障時，使用者仍可利用他 組提示單元進行檢測，從而可減少提示單元的更換頻率。 需注意的是，上述各實施方式僅例示本發明之較佳實 施例，為避免贅述，並未詳加記載所有可能的變化組合。 然而，本領域之通常知識者應可理解，上述各元件未必皆 為必要，且為實施本發明，亦可能包含其他較細節之習知 元件。各元件皆可能視需求加以省略或修改，且任兩元件 間未必不存在其他元件。 最後請參考圖5，係關於本發明之地線檢測方法之流 201237431 程圖。本發明之地線檢測方法係可用於上述之地線檢測裝 置1、la及lb，但本發明並不以此為限。為方便說明，以 上即以本發明之地線檢測方法適用於地線檢測裝置1為例 進行說明。 首先進行步驟S1 :提供一電源供應器，以供產生一電 流。 如圖1所示，步驟S1係藉由地線檢測裝置1之電源供 應器10提供一電流。 接著進行步驟S2 :提供至少一開關元件，用以電性連 接電源供應器。 如圖1所示，步驟S2係提供至少一開關元件20,以電 性連接電源供應器10所提供之電流，藉以讓使用者可開啟 或關閉該開關元件20，以決定是否進行檢測。 接著進行步驟S3 :使檢測單元之第一檢測端連接第一 端，並使檢測單元之第二檢測端連接第二端。 如圖1所示，步驟S3係將檢測單元40之第一檢測端 41與第二檢測端42分別連接至電氣設備90之第一端91 與第二端92，藉以使地線檢測裝置1與電氣設備90可形 成一迴路狀態。 接著進行步驟S4 :使至少一第一提示單元之第一正端 電性連接開關元件，並使第一提示單元之第一負端接地。 如圖1所示，步驟S4係提供至少一第一提示單元30， 並且將第一提示單元30之第一正端301連接至開關元件 20,同時使第一提示單元30之第一負端302接地，藉以形 成與電氣設備90並聯之迴路狀態。 201237431 接著進行步驟S5 :提供至少一旁路元件，並使旁路元 件電性連接第一正端與第一負端。 如圖1所示，為避免因提供電流過大而損壞第一提示 單元30，因此步驟S5係提供至少一旁路元件60，並使其 電性連接第一正端301與第一負端302，以使其能與第一 提示單元30並聯，藉以分散流向第一提示單元30之電流。 接著進行步驟S6:提供至少一第二提示單元，並使第 二提示單元之第二正端電性連接開關元件，第二提示單元 之第二負端電性連接第一正端。 如圖1所示，步驟S6係提供至少一第二提示單元50， 並使其第二正端51電性連接開關元件20，且第二負端50 電性連接第一正端301，以使第二提示單元50與開關元件 20及第一提示單元30串聯。 再來進行步驟S7 :開啟開關元件，以使電流流經檢測 xsxx —* 單7G。 如圖1所示，當上述步驟之連接動作完成後，可藉由 步驟S7開啟至少一開關元件20，以使電源供應器10所提 供之電流可流經檢測單元40。 再來進行步驟S8 :藉由第一提示單元是否作用，判斷 電流是否通過電氣設備。 在前述之步驟完成後5地線檢測裝置1與電氣設備90 之間會形成迴路，且由於第一提示單元30接地，同時其亦 與電氣設備90並聯，因此便可藉由第一提示單元30有無 作用來判斷該電氣設備90之地線是否正常。 其中，若第一提示單元30發生作用，表示第二端92 201237431 沒有接地。因為此時電氣設備9〇之地線為斷開狀態，電流 便會流經第一提示單兀30而使其發生作用，以告知使用者 該電氣設備90之地線已經斷開。 反之，若第一提示單元30不作用，表示第二端92有 接地。 綜上所陳，本發明無論就目的、手段及功效，在在均 顯示其週異於習知技術之特徵，為—大突破，•請貴審 查委員明察日賜准專利’俾嘉惠社會，實^德便。惟 須注意，上述實施例僅為例示性說明本發明之原理及其功 效，而非用於限制本發明之範圍。任何熟於此項技藝^人 士均可在不違背本發明之技術原理及精神下，對實施例 修改與變化。本發明之權利保護範圍應如後述之申請專 範圍所述。 【圖式簡單說明】 圖1係本發明之地線檢測裝置之第一實施例之架構圖。 圖2a係本發明之地線檢測裝置於電氣設備之地線在正常 之工作示意圖。 圖2b係本發明之地線檢測裝置於電氣設備之地線在異常下 之工作示意圖。 圖3係本發明之地線檢測裝置之第二實施例之架構圖。 圖4係本發明之地線檢測裝置之第三實施例之架構圖。。 圖5係本發明之地線檢測方法之流程圖。 【主要元件符號說明】 地線檢測裝置1、la、lb 電源供應器10 201237431 開關元件20 第一正端301 檢測單元40 第二檢測端42 第二正端51 旁路元件60 第一端91 第一提示單元30 第一負端302 第一檢測端41 第二提示單元50 第—負端5 2 電氣設備90 第二端92The second prompting unit 50 includes a second positive end 51 and a second negative end 52 for prompting the user whether the ground detecting device 1 is functioning normally. The second positive end 51 is electrically connected to the switching element 20, and the second The negative terminal 52 is electrically connected to the first positive terminal 301, whereby when the user activates the switching element 20, and the power supply 10 is in a normal function, the current supplied by the power supply 10 can flow through the first The second prompting unit 50 acts to inform the user that the ground detecting device 1 is in a normal operating state. In an embodiment of the present invention, the second prompting unit 50 includes an LED light and a buzzer (not shown), and the LED light of the second prompting unit 50 can be used with the LED light used by the first prompting unit 30. Differently, for example, the LED 201237431 of the first prompting unit 30 is red, and the second prompting unit 50 is green, but the invention is not limited thereto. Similarly, the buzzer of the second prompting unit 50 and the buzzer of the first prompting unit 30 can be designed as two buzzers with different sounds, so as to enable the user to distinguish, but the present invention does not Limited. The bypass element 60 is electrically connected to the first positive end 301 and the first negative end 302 respectively for providing a current flow path, thereby dispersing the current flowing to the first prompting unit 30, thereby avoiding damage to the first due to excessive current supply. Prompt unit 30. In one embodiment of the invention, the bypass element 60 is a capacitor. Please continue to refer to FIG. 2a and FIG. 2b, and continue to refer to FIG. 1 at the same time. In general, electrical device 90 grounds its second end 92 (so-called ground) to avoid leakage current. When the first detecting end 41 and the second detecting end 42 of the local line detecting device 1 are respectively connected to the first end 91 and the second end 92 of the electrical device 90, when the ground line is normally grounded, the electrical device 90 is The ground is in a conducting state, so when the switching element 20 is activated, current flows through the electrical device 90 (as shown in FIG. 2a) to form a loop with the ground detecting device 1, and the first prompting unit 30 passes no current because of the current. So it won't work. On the other hand, if the grounding of the electrical device 90 is abnormal, since the electrical device 90 is disconnected from the ground, the current will change the flow direction and flow through the first prompting unit 30, at which time the first prompting unit 30 will function. In order to prompt the user that the ground of the electrical device 90 has been disconnected. The advantage of the ground detecting device 1 of the present invention is that the user can promptly prompt the user about the grounding state of the electrical device 90, and can also introduce the leakage current generated after the device ground wire is disconnected into the ground (as shown in FIG. 2b). It can reduce the risk of users accidentally touching the electric leakage. Referring next to Fig. 3, there is shown a block diagram of a second embodiment of the ground detecting device of the present invention. In the second embodiment of the ground detecting device of the present invention, the ground 201237431 line detecting device 1a includes a power supply 10 (not shown), a plurality of switching elements 20, a plurality of first prompting units 30, and a plurality of detecting units. 40 (not shown), a plurality of second prompting units 50, and a plurality of bypass elements 60. As shown in Fig. 3, since the ground line detecting device 1a is formed in parallel by the ground line detecting device 1 of the first embodiment described above, a plurality of electric devices 90 can be simultaneously detected. It should be noted that, in an embodiment of the present invention, the ground detecting device 1a can be provided by a power supply 10 to the plurality of first prompting unit 30 and the second prompting unit 50, but the present invention does not limit. Since the functions and connection relationships of the elements of the ground line detecting device 1a of the second embodiment of the present invention are the same as those of the ground line detecting device 1 of the first embodiment, they will not be described again. Referring to Figure 4, there is shown a block diagram of a third embodiment of the ground detecting device of the present invention. The ground detecting device 1b of the third embodiment of the present invention can also be used to simultaneously detect a plurality of electrical devices 90, except that it is different from the detecting device 1a of the second embodiment described above, the ground detecting device 1b is a switching element 20 Simultaneously controlling the two sets of first prompting unit 30 and second prompting unit 50 to reduce the use of the switching element 20, thereby greatly reducing the manufacturing cost, and when one of the group of prompting units fails, the user can still The detection unit of the group is used for detection, thereby reducing the frequency of replacement of the prompting unit. It is to be noted that the above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and that all possible combinations of variations are not described in detail to avoid redundancy. However, it will be understood by those of ordinary skill in the art that the above-described elements are not necessarily required, and that other details of the conventional elements may be included in the practice of the invention. Each component may be omitted or modified as needed, and no other components may be present between any two components. Finally, please refer to FIG. 5, which is a flow chart of the method for detecting the ground line of the present invention 201237431. The ground detecting method of the present invention can be applied to the above-described ground detecting devices 1, 1a and 1b, but the present invention is not limited thereto. For convenience of explanation, the above-described ground detecting method of the present invention is applied to the ground detecting device 1 as an example for description. First, step S1 is performed: a power supply is provided for generating a current. As shown in Fig. 1, step S1 provides a current by the power supply 10 of the ground line detecting device 1. Then, step S2 is performed: at least one switching element is provided for electrically connecting the power supply. As shown in FIG. 1, step S2 provides at least one switching element 20 for electrically connecting the current supplied by the power supply 10, so that the user can turn the switching element 20 on or off to determine whether to detect. Then, step S3 is performed: connecting the first detecting end of the detecting unit to the first end, and connecting the second detecting end of the detecting unit to the second end. As shown in FIG. 1, step S3 connects the first detecting end 41 and the second detecting end 42 of the detecting unit 40 to the first end 91 and the second end 92 of the electrical device 90, respectively, so that the ground detecting device 1 and the ground detecting device 1 Electrical device 90 can form a loop condition. Then, step S4 is performed: electrically connecting the first positive end of the at least one first prompting unit to the switching element, and grounding the first negative end of the first prompting unit. As shown in FIG. 1 , step S4 provides at least one first prompting unit 30, and connects the first positive end 301 of the first prompting unit 30 to the switching element 20 while the first negative end 302 of the first prompting unit 30 is provided. Grounding, thereby forming a loop state in parallel with the electrical device 90. 201237431 Next, step S5 is performed: at least one bypass element is provided, and the bypass element is electrically connected to the first positive end and the first negative end. As shown in FIG. 1 , in order to avoid damage to the first prompt unit 30 due to excessive current supply, step S5 provides at least one bypass element 60 and electrically connects the first positive end 301 and the first negative end 302 to It can be connected in parallel with the first cueing unit 30 to disperse the current flowing to the first cueing unit 30. Then, the step S6 is performed to provide at least one second prompting unit, and the second positive end of the second prompting unit is electrically connected to the switching element, and the second negative end of the second prompting unit is electrically connected to the first positive end. As shown in FIG. 1 , step S6 provides at least one second prompting unit 50, and electrically connects the second positive end 51 to the switching element 20, and the second negative end 50 is electrically connected to the first positive end 301. The second prompting unit 50 is connected in series with the switching element 20 and the first prompting unit 30. Step S7 is further performed: the switching element is turned on to cause a current to flow through the detection xsxx —* single 7G. As shown in FIG. 1, after the connection operation of the above steps is completed, at least one switching element 20 can be turned on by step S7, so that the current supplied by the power supply 10 can flow through the detecting unit 40. Step S8 is further performed to determine whether the current passes through the electrical device by whether the first prompting unit is active. After the foregoing steps are completed, a loop is formed between the ground detecting device 1 and the electrical device 90, and since the first prompting unit 30 is grounded and is also connected in parallel with the electrical device 90, the first prompting unit 30 can be used. Is there any effect to determine whether the ground of the electrical device 90 is normal? Wherein, if the first prompting unit 30 acts, it indicates that the second end 92 201237431 is not grounded. Since the ground of the electrical device 9 is turned off at this time, current flows through the first prompt unit 30 to cause the user to notify the user that the ground of the electrical device 90 has been disconnected. On the other hand, if the first prompting unit 30 does not work, it indicates that the second end 92 is grounded. To sum up, the present invention, regardless of its purpose, means and efficacy, shows its characteristics different from the conventional technology, and is a big breakthrough, and please review the patents granted by the reviewing committee. Real ^ De will. It is to be noted that the above-described embodiments are merely illustrative of the principles of the invention and its advantages, and are not intended to limit the scope of the invention. Any modifications and variations of the embodiments may be made without departing from the spirit and scope of the invention. The scope of protection of the present invention should be as described in the scope of the application as described later. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a block diagram showing a first embodiment of a ground detecting device of the present invention. Fig. 2a is a schematic view showing the normal operation of the ground detecting device of the present invention on the ground of the electrical equipment. Fig. 2b is a schematic view showing the operation of the ground detecting device of the present invention under the abnormality of the ground of the electrical equipment. Figure 3 is a block diagram showing a second embodiment of the ground detecting device of the present invention. Figure 4 is a block diagram showing a third embodiment of the ground detecting device of the present invention. . Fig. 5 is a flow chart showing the ground detecting method of the present invention. [Main component symbol description] Ground detecting device 1, la, lb power supply 10 201237431 Switching element 20 First positive end 301 Detection unit 40 Second detecting end 42 Second positive end 51 Bypass element 60 First end 91 A prompting unit 30 first negative end 302 first detecting end 41 second prompting unit 50 first negative end 5 2 electrical device 90 second end 92