200946866 九、發明說明： 【發明所屬之技術領域】 本發明涉及一種内徑測量裝置及其測量方法。 【先前技術】 業界通常使用遊標卡尺來粗略測量物體的内徑：將 其兩内測量爪伸入待測量物體的内孔中並抵于内孔的内 壁，然後讀數即可得該物體的内徑。使用遊標卡尺測量 ❹内徑時，由於兩内測量爪所抵的位置極有可能不是該待 測量物體的内孔的直徑上的兩個圓周點，而是一條弦上 的兩個圓周點，這樣使得所測得的孔内徑偏小。 【發明内容】 鑒於以上内容，有必要提供一種簡單有效的内徑測 量裝置。 此外還提供一種内徑測量方法。 種内徑測置裝置，用來測量一物體的孔的内徑， ❹其包括一感應單元、一訊號處理單元及一顯示單元，該 訊號處理單元連接該感應單元及該顯示單元，該感應單 疋包括一多爪檢測觸頭，該檢測觸頭包括複數呈圓周排 列的測量爪，該等測量爪末端可向外散射而抵觸該物體 的，的内壁’該檢測觸頭上裝設有角度感測器用於感應 該等測量爪所張開的角度並產生感應訊號發送給該訊號 處理單;該訊號處理單元將感應訊號進行處理並利用 各测量爪的角度值進行計算得出該物體的内徑，該顯示 單元將該内徑顯示出來。 7 200946866 •一種内徑測量方法，包括以下步驟·· 主上電，系統進行初始化，將該顯示單元的顯示資訊 /月二使該夕爪檢測觸頭的各個測量爪處於待測量狀態； 將該内徑測量裝置的檢測觸頭伸入到該物體的孔 中； 使感應單元的檢測觸頭的各測量爪呈發射狀散開直 到其中至少一測量爪與該待測量物體的孔的内壁相抵 觸，從而得到包含該測量爪張開的角度值的感應訊號； 該訊號處理單元接收來自該感應單元的感應訊號， 將感應訊號進行處理並根據公式d=D+2Lsin(9計算出待 測物體的孔的内徑d，其中D為在待測量狀態時測量爪的 末端所在圓周的直徑，L為測量爪的外侧長度，0為測量 爪在測量時所張開的角度；以及 將所得内徑的數值d顯示於該顯示單元。 相較習知技術，本發明檢測裝置及其檢測方法利用 ❹測1爪的張開角度來計算待測物體的内徑，測量結果準 確。 【實施方式】 請參閱圖1，本發明内徑測量裝置較佳實施方式包括 一感應單元100、一訊號處理單元200及一顯示單元300。 請一併參閱圖2與圖3’該感應單元1〇〇在本實施方 式中為一傘骨狀的多爪檢測觸頭1 0。該多爪檢測觸頭1〇 包括至少三個外侧長度為L的測量爪11，該等測量爪11 的末端位於一水平面内的一直徑為D的圓周上。在待測 200946866 • 量狀態時該等測量爪11處於豎直且相互平行的位置；測 量時’該等測量爪11像打開的雨傘的傘骨一樣呈發射狀 散開’每一測量爪11與其待測量狀態時呈一角度0。該 檢測觸頭10上裝設有角度感測器12用於感應測量爪η 所張開的角度0並將該角度0發送給該訊號處理單元 200 ° 該訊號處理單元200用於接收來自該感應單元ι〇〇 ❹中包含各測量爪U張開角度的感應訊號，將感應訊號進 行處理運算。假設待測物體的内徑為d，則d=£)+2Ls i η 0。 該訊號處理單元200在本實施方式中包括一微處理晶片 20 ° 該顯不單元300用於將經過該訊號處理單元2〇〇處 理，得出的檢測結果顯示出來。在本實施方式中，該顯 示單元300包括一液晶顯示器。 每一測量爪11的末端外侧也可以裝有壓力感測器 ❹14以使測量爪11觸碰到待測量物體的内孔的侧壁時發 生感應訊號以判斷是否有測量爪η尚未觸碰到該内孔的 7壁。該等測量爪U可以是同步聯動，也可以是各個測 置爪11分別動作。 若該等測量爪11是同步聯動的，即其中一個測量爪 的張開角度為β，則其他測量爪的張開角度也必為Θ。 =果所測内孔為非理想狀態下的圓形，當將該等測量爪 伸入待測物體内孔時，其中一個或多個測量爪接觸到 了内孔的内壁，而其他測量爪並未接觸到内孔的内壁， 9 200946866 此時所測得的内徑為與該内孔内切的最大圓的直徑。 若該等測量爪11是分別動作的，即各測量爪在測量 時呈發射狀散開，直到分別接觸到内孔的内壁。如果所 測内孔為非理想狀態下的圓形，當將該等測量爪u伸入 待測物體内孔時，該等測量爪u所張開的角度0是不完 王相同的。感應單元1 〇 〇將包括各測量爪11所張開角度 0的感應訊號傳送給該訊號處理單元2〇〇後，該訊號處 理單元200可根據各θ值分別計算出所測内孔的最大直 徑、最小直徑及直徑均值並將結果輸出到該顯示單元 300。 請一併參閱圖4，本發明内徑測量方法的流程如下： 步驟S402，上電後，系統進行初始化，例如將該顯 示單元的顯示資訊清空’使該多爪檢測觸頭的各個測 量爪11處於待測量狀態。其中測量爪11的外侧長度為 L，該等測量爪11的末端在待測量狀態時位於一水平面 ❹上的一直徑為D的圓周上。 步驟S404，將待測量物體置於一平臺上，使該待測 量物體的内孔軸向垂直於該平臺。 步驟S40 6 ’將該内徑測量裝置的檢測觸頭1 〇伸入到 該内孔内’並使各測量爪11垂直於該平臺。 步驟S408 ’使該檢測觸頭1 〇的各測量爪11呈發射 狀散開並與該待測量物體的内孔壁相抵觸並產生包括各 測量爪11張開的角度0值的感應訊號。 步驟S410，該訊號處理單元200接收來自該感應單 200946866 兀100的感應訊號，將感應訊號進行處理並根據公式 d=D+2Lsin0計算出待測物體的内徑d。 步驟S412 ’將所得内徑的數值d顯示於該顯示單元 300 ° 綜上所述，本發明符合發明專利要件，爰依法提出 專利申凊。惟，以上所述者僅為本發明之較佳實施方式， 舉凡熟悉本案技藝之人士，在爰依本發明精神所作之等 效修飾或變化’皆應涵蓋於以下之申請專利範圍内。 ® 【圖式簡單說明】 圖1為本發明内徑測量裝置的電路框圖。 圖2為本發明内徑測量裝置較佳實施方式在未進行 測量狀態下的結構示意圖。 圖3為本發明内徑測量裝置較佳實施方式在進行測 量狀態下的結構示意圖。 圖4為本發明内徑測量方法的流程圖。 【主要元件符號說明】 感應單元 100 訊號處理單元 200 顯示單元 300 多爪檢測觸頭 10 測量爪 11 角度感測器 12 壓力感測器 14 微處理晶片 20 液晶顯不器 31 11200946866 IX. Description of the Invention: [Technical Field] The present invention relates to an inner diameter measuring device and a measuring method thereof. [Prior Art] The vernier caliper is generally used to roughly measure the inner diameter of an object: the two inner measuring claws are inserted into the inner hole of the object to be measured and abut against the inner wall of the inner hole, and then the inner diameter of the object is obtained by reading. When measuring the inner diameter of the crucible using a vernier caliper, it is highly likely that the position of the inner measuring jaws is not two circumferential points on the diameter of the inner hole of the object to be measured, but two circumferential points on one string, thus The measured inner diameter of the pores is small. SUMMARY OF THE INVENTION In view of the above, it is necessary to provide a simple and effective inner diameter measuring device. A method of measuring the inner diameter is also provided. An inner diameter measuring device for measuring an inner diameter of a hole of an object, comprising a sensing unit, a signal processing unit and a display unit, wherein the signal processing unit is connected to the sensing unit and the display unit, the sensing unit The 疋 includes a multi-jaw detecting contact, the detecting contact includes a plurality of circumferentially arranged measuring claws, and the measuring claw ends are outwardly scatterable against the object, and the inner wall of the detecting contact is provided with an angle sensing The device is configured to sense an opening angle of the measuring claws and generate an inductive signal to be sent to the signal processing unit; the signal processing unit processes the sensing signal and calculates an inner diameter of the object by using an angle value of each measuring claw. The display unit displays the inner diameter. 7 200946866 • A method for measuring the inner diameter, comprising the following steps: · main power-on, the system performs initialization, and the display information of the display unit/month 2 causes the respective measurement claws of the eve detection contact to be in a state to be measured; The detecting contact of the inner diameter measuring device protrudes into the hole of the object; the measuring claws of the detecting contact of the sensing unit are radiated until the at least one measuring claw interferes with the inner wall of the hole of the object to be measured, Obtaining an inductive signal including an angle value of the measuring claw opening; the signal processing unit receives the sensing signal from the sensing unit, processes the sensing signal, and calculates a hole of the object to be tested according to the formula d=D+2Lsin (9) Inner diameter d, where D is the diameter of the circumference of the end of the measuring jaw when in the state to be measured, L is the outer length of the measuring jaw, 0 is the angle at which the measuring jaw is opened during the measurement; and the value of the resulting inner diameter d is displayed on the display unit. Compared with the prior art, the detecting device and the detecting method thereof of the present invention calculate the inner diameter of the object to be tested by measuring the opening angle of the claw, and the measurement result [Embodiment] Referring to Figure 1, a preferred embodiment of the inner diameter measuring device of the present invention comprises a sensing unit 100, a signal processing unit 200 and a display unit 300. Please refer to Figure 2 and Figure 3 for the sensing. The unit 1 is in the present embodiment an arbor-shaped multi-jaw detecting contact 10. The multi-jaw detecting contact 1 includes at least three measuring claws 11 of an outer length L, the measuring claws 11 The ends are located on a circle of diameter D in a horizontal plane. The measuring jaws 11 are in a vertical and parallel position when the state is to be tested 200946866. When measuring, the measuring claws 11 are like umbrellas of an open umbrella. The bones are scattered like an emission. Each measuring claw 11 is at an angle of 0 to the state to be measured. The detecting contact 10 is provided with an angle sensor 12 for sensing the angle 0 of the opening of the claw η and The angle 0 is sent to the signal processing unit 200 °. The signal processing unit 200 is configured to receive an inductive signal from the sensing unit ι including the opening angle of each measuring claw U, and process the sensing signal. Inside the object Is d, d = £) + 2Ls i η 0. The signal processing unit 200 includes a micro-processed wafer 20 in the present embodiment. The display unit 300 is configured to display the detection result obtained by the signal processing unit 2 。. In the present embodiment, the display unit 300 includes a liquid crystal display. A pressure sensor ❹ 14 may be disposed on the outer side of the end of each of the measuring claws 11 to cause an inductive signal when the measuring claw 11 touches the side wall of the inner hole of the object to be measured to determine whether or not the measuring claw η has not touched the 7 walls of the inner hole. The measuring claws U may be synchronously linked, or each of the measuring claws 11 may be operated separately. If the measuring jaws 11 are synchronously linked, i.e., the opening angle of one of the measuring jaws is β, the opening angle of the other measuring jaws must also be Θ. = The measured inner hole is a circular shape in a non-ideal state. When the measuring claws are inserted into the inner hole of the object to be tested, one or more of the measuring claws contact the inner wall of the inner hole, and the other measuring claws are not Contacting the inner wall of the inner bore, 9 200946866 The inner diameter measured at this time is the diameter of the largest circle inscribed with the inner bore. If the measuring jaws 11 are respectively actuated, that is, the measuring claws are emitted in an emission state when measured until they respectively contact the inner wall of the inner hole. If the measured inner hole is a circular shape in a non-ideal state, when the measuring claws u are projected into the inner hole of the object to be tested, the angle 0 of the measuring claws u is not the same. After the sensing unit 1 transmits the sensing signal including the opening angle 0 of each measuring claw 11 to the signal processing unit 2, the signal processing unit 200 can calculate the maximum diameter of the measured inner hole according to each θ value. The minimum diameter and the diameter mean are averaged and the result is output to the display unit 300. Referring to FIG. 4 together, the flow of the inner diameter measuring method of the present invention is as follows: Step S402, after power-on, the system performs initialization, for example, clearing the display information of the display unit to make the respective measuring claws 11 of the multi-claw detecting contact It is in the state to be measured. Wherein the outer length of the measuring claw 11 is L, and the ends of the measuring claws 11 are located on a circumference of a diameter D on a horizontal plane in the state to be measured. Step S404, placing the object to be measured on a platform such that the inner hole of the object to be measured is axially perpendicular to the platform. Step S40 6 'extends the detecting contact 1 of the inner diameter measuring device into the inner bore' and makes each measuring claw 11 perpendicular to the platform. Step S408' causes the respective measuring claws 11 of the detecting contact 1 to be radiated and collided with the inner wall of the object to be measured and generates an inductive signal including an angle 0 value at which the measuring claws 11 are opened. In step S410, the signal processing unit 200 receives the sensing signal from the sensing unit 200946866 兀100, processes the sensing signal, and calculates the inner diameter d of the object to be tested according to the formula d=D+2Lsin0. Step S412 'shows the value d of the obtained inner diameter on the display unit 300 °. The present invention complies with the invention patent requirement, and proposes a patent application according to law. However, the above-mentioned embodiments are merely preferred embodiments of the present invention, and equivalent modifications or variations made by those skilled in the art will be covered by the following claims. ® [Simple Description of the Drawings] Fig. 1 is a circuit block diagram of an inner diameter measuring device of the present invention. Fig. 2 is a schematic view showing the structure of a preferred embodiment of the inner diameter measuring device of the present invention in an unmeasured state. Fig. 3 is a structural schematic view showing a preferred embodiment of the inner diameter measuring device of the present invention in a measuring state. 4 is a flow chart of a method of measuring an inner diameter of the present invention. [Main component symbol description] Induction unit 100 Signal processing unit 200 Display unit 300 Multi-jaw detection contact 10 Measuring claw 11 Angle sensor 12 Pressure sensor 14 Microprocessor wafer 20 Liquid crystal display 31 11