以下將參照相關圖式，說明依本發明較佳實施例之三維定位裝置與方法，其中相同的元件將以相同的參照符號加以說明。 請參照圖1A至圖1C所示，其中，圖1A與圖1B分別為本發明較佳實施例之三維定位裝置1的功能方塊示意圖與立體示意圖，而圖1C為本發明較佳實施例之三維定位方法的流程步驟示意圖。 如圖1A與圖1B所示，三維定位裝置1可用以偵測位於一場域內的一待測物T的位置，並包括至少三個無線傳輸模組11a、11b、11c、至少一個第一氣壓感測器（pressure altimeter）12、一無線接收模組13、一第二氣壓感測器14以及一控制模組15。另外，如圖1C所示，本發明的三維定位方法是應用於三維定位裝置1，並可用以偵測位於該場域內的待測物T的三維位置。三維定位方法包括以下步驟：由該些無線傳輸模組分別發出一無線訊號（步驟S01）；由第一氣壓感測器感測到一第一氣壓（步驟S02）；由第二氣壓感測器感測到一第二氣壓（步驟S03）；由無線接收模組分別接收該些無線訊號（步驟S04）；以及依據該些無線訊號、第一氣壓與第二氣壓計算出待測物於該場域的三維位置（步驟S05）。以下，將說明本實施例的三維定位裝置1與三維定位方法的詳細技術內容。 如圖1A及圖1B所示，本實施例是以三個無線傳輸模組11a、11b、11c與一個第一氣壓感測器12為例，然並不以此為限，在不同的實施例中，三維定位裝置1也可包括多於三個的無線傳輸模組11a、11b、11c與多於一個的第一氣壓感測器12，並不限制。另外，上述所謂的「場域」，例如但不限於為室內的倉儲空間、或賣場、或辦公室，或其它的室內空間。而待測物T例如是人員或物件，且無線接收模組13與第二氣壓感測器14是分別設置於待測物T上。當待測物T為人員時，則無線接收模組13與第二氣壓感測器14可例如位於人員攜帶的行動裝置內（例如手機或平板本身具有無線接收模組13與第二氣壓感測器14），或者，無線接收模組13與第二氣壓感測器14也可以是人員另外配戴的接收與感測裝置（例如配戴的智慧手環內有無線接收模組13與第二氣壓感測器14），或是人員另外攜帶無線接收模組13與第二氣壓感測器14的設備，並不限定；此外，當待測物T為物件時，則該物件上可安裝有無線接收模組13與第二氣壓感測器14。 無線傳輸模組11a、11b、11c設置於該場域的不同位置，且無線傳輸模組11a、11b、11c可分別發出一無線訊號S1、S2、S3（步驟S01）。其中，無線傳輸模組11a、11b、11c可分別為Wi-Fi、或ZigBee、或藍芽、或射頻（RF）、或電信網路等無線傳輸模組，並不限定。因此，可透過無線傳輸模組11a、11b、11c分別發出無線訊號S1、S2、S3。 第一氣壓感測器12鄰設於該些無線傳輸模組11a、11b、11c的其中之一，且第一氣壓感測器12可感測到一第一氣壓P1（步驟S02）。在本實施例中，第一氣壓感測器12是緊靠於無線傳輸模組11a而設置，以感測大氣壓力，經由換算後可得到第一氣壓感測器12所在位置的高度資訊。較佳者，第一氣壓感測器12為氣壓高度計，可經由感測大氣壓力而得到設置位置的海拔高度。 無線傳輸模組11a、11b、11c與第一氣壓感測器12可位於該場域的同一高度上，例如但不限於位於天花板的不同位置上。較佳者，無線傳輸模組11a、11b、11c與第一氣壓感測器12可整合於該場域的天花板之不同燈具內，而待測物T（無線接收模組13與第二氣壓感測器14）則位於無線傳輸模組11a、11b、11c與該場域之一平面（例如地面）P之間。本實施例之無線傳輸模組11a、11b、11c與第一氣壓感測器12是位於該場域的同一高度上，因此只要設置一個第一氣壓感測器12即可得知無線傳輸模組11a、11b、11c的高度資訊。 在不同的實施例中，無線傳輸模組的其中之一與無線傳輸模組的其中另一亦可位於該場域的不同高度上。若無線傳輸模組11a、11b、11c位於不同高度的話，則不同高度的無線傳輸模組也需配置第一氣壓感測器12。舉例來說，例如無線傳輸模組11b位於柱子上，而無線傳輸模組11a、11c位於天花板的不同燈具上，且無線傳輸模組11b與無線傳輸模組11a、11c安裝的高度不同時，則一個第一氣壓感測器12鄰設於無線傳輸模組11a，且需要另一個第一氣壓感測器12鄰設於無線傳輸模組11b，以透過第一氣壓感測器12得到無線傳輸模組11a、11c的高度資訊，且透過另一個第一氣壓感測器12得到無線傳輸模組11b的高度資訊。此外，在又一實施例中，當三個無線傳輸模組11a、11b、11c於該場域的高度皆不相同時，則需對應設置三個第一氣壓感測器12分別鄰設於三個無線傳輸模組11a、11b、11c，以透過這三個第一氣壓感測器12分別取得這三個無線傳輸模組11a、11b、11c的高度資訊，以供後續計算待測物T的位置座標之用。 此外，無線傳輸模組11a、11b、11c與第一氣壓感測器12除了可安裝於天花板的燈具或柱子上之外，在不同的實施例中，亦可將它們安裝於例如偵煙器旁、或空調出風口、或其他設備上，本發明亦不限制。 第二氣壓感測器14可感測到一第二氣壓P2（步驟S03），且無線接收模組13可分別接收由無線傳輸模組11a、11b、11c發出的無線訊號S1、S2、S3（步驟S04）。於此，由於第二氣壓感測器14設置於待測物T上，因此，第二氣壓感測器14感測的大氣壓力為待測物T所在高度的大氣壓力，進而可得到待測物T的高度資訊。由於，氣壓感測器（12、14）感測大氣壓力而得知其海拔高度資訊為通常知識者所熟知技術，或者可查詢相關資料而得知，此處不再贅述其技術原理。 另外，無線接收模組13與無線傳輸模組11a、11b、11c對應設置。舉例來說，無線傳輸模組11a、11b、11c若為Wi-Fi無線傳輸模組時，無線接收模組13則為Wi-Fi無線接收模組，以分別接收無線傳輸模組11a、11b、11c所發出的Wi-Fi無線訊號（S1、S2、S3）。 值得一提的是，上述的步驟S01、S02、S03的順序只是舉例。在不同的實施例中，步驟S01、S02、S03的順序也可例如依序為S03、S02、S01，或S01、S03、S02，…或其他順序，並不可用以限制本發明。 控制模組15分別耦接第一氣壓感測器12、第二氣壓感測器14與無線接收模組13。其中，耦接可為有線方式或無線方式的耦接，而無線例如可透過Wi-Fi、或ZigBee、或藍芽、或射頻（RF）、或電信網路等無線傳輸模組來進行。在一些實施例中，控制模組15可與無線接收模組13、第二氣壓感測器14整合成同一構件，例如位於人員（待測物T）所攜帶的行動裝置內，或者控制模組15也可與無線傳輸模組11a、11b、11c或第一氣壓感測器12整合成同一構件，或者，控制模組15可為獨立設置的構件，只要可以透過有線或無線方式與第一氣壓感測器12、第二氣壓感測器14與無線接收模組13耦接即可，本發明並不限制。 在本實施例中，控制模組15與無線接收模組13整合成同一構件（同樣位於待測物T上，例如是人員攜帶的行動裝置中包含有控制模組15、無線接收模組13、第二氣壓感測器14）。於此，控制模組15具有運算能力，並可包含核心控制組件，例如可包含至少一中央處理器（CPU，例如微處理器）及一記憶體，或包含其它控制硬體、軟體或韌體。 控制模組15可依據該些無線訊號S1、S2、S3、第一氣壓P1與第二氣壓P2計算出待測物T於該場域的三維位置（步驟S05）。如圖1B所示，控制模組15可依據接收到的該些無線訊號S1、S2、S3的接收信號強度指示（Received Signal Strength Indication, RSSI）分別得到該些無線傳輸模組11a、11b、11c與待測物T之間的一距離d1、d2、d3。由於檢測接收信號強度指示（RSSI）的檢測設備簡單，硬體成本低，也可通過多次測量平均獲得較準確的信號強度值，因此，無線接收模組13接收到的無線訊號S1、S2、S3可分別得到無線傳輸模組11a、11b、11c與無線接收模組13（即待測物T）之間的RSSI測距度量值。之後，控制模組15再將此測距度量值轉換而得到待測物T與無線傳輸模組11a、11b、11c之間的距離d1、d2、d3。由於，接收信號強度指示（RSSI）換算成距離為通常知識者所熟知技術，或者可查詢相關資料而得知，此處不再贅述其技術原理。 另外，由於透過第一氣壓P1可得到第一氣壓感測器12所在位置的高度資訊，透過第二氣壓P2可得到第二氣壓感測器14所在位置的高度資訊，故控制模組15更可依據第一氣壓P1與第二氣壓P2得到第一氣壓感測器12與第二氣壓感測器14之間的一高度差。在一些實施例中，此高度差的精準度可小於20公分，在一些特殊例子甚至可以精準到小於5公分。在本實施例中，由於無線傳輸模組11a、11b、11c與第一氣壓感測器12位於該場域的同一高度，因此，無線傳輸模組11a、11b、11c與待測物T的高度差h1、h2、h3皆相同，且無線傳輸模組11a、11b、11c與平面P之間的高度差Ht相等且為已知，故待測物T離平面P的（z軸）高度h0亦可得知。 因此，控制模組15更可依據該些距離d1、d2、d3及高度差(h1、h2、h3)得到待測物T於場域的三維座標位置。其中，無線傳輸模組11a、11b、11c與無線接收模組13之間的距離若以d來表示，而第一氣壓感測器12與第二氣壓感測器14的高度差以h來表示，且待測物T於該場域的平面P上的二維座標為(x,y)時，則距離d、高度差h與座標(x,y)將滿足以下方程式：d
2＝(x
2＋y
2)＋h
2，以下會再詳細說明。 請參照圖1B並配合圖2A與圖2B、圖3A與圖3B、圖4A與圖4B所示，其中，圖2A為圖1B的三維定位裝置1中，無線傳輸模組11a（第一氣壓感測器12）與待測物T的側視示意圖，而圖2B為圖1B的三維定位裝置1中，待測物T投影至平面P時，與位置點O1的相對位置示意圖，圖3A為圖1B的三維定位裝置1中，無線傳輸模組11b與待測物T的側視示意圖，而圖3B為圖1B的三維定位裝置1中，待測物T投影至平面P時，與位置點O2的相對位置示意圖，圖4A為圖1B的三維定位裝置1中，無線傳輸模組11c與待測物T的側視示意圖，而圖4B為圖1B的三維定位裝置1中，待測物T投影至平面P時，與位置點O3的相對位置示意圖。其中，位置點N1、N2、N3與待測物O位於同一高度，位置點N1、N2、N3投影到平面P分別為位置點O1、O2、O3，而待測物T投影到平面P為位置點N0。 在圖2B中，若位置點O1的座標為(0,0)，待測物T的座標假設為(x1,y1)，則r1
2＝x1
2＋y1
2。另外，如圖2A所示，由於位置點N1投影至平面P上為位置點O1，而待測物T投影至平面P上為位置點N0，故位置點N1與待測物T之間的距離及位置點O1與位置點N0的距離相同，皆為r1（以球體的形狀來看，皆為球體半徑）。因此，由圖2A中可得知，d1
2＝r1
2＋h1
2＝(x1
2＋y1
2)＋h1
2-----（式一）。 另外，在圖3B中，若位置點O2的座標為(0,0)，待測物T的座標假設為(x2,y2)，則r2
2＝x2
2＋y2
2。同樣地，如圖3A所示，由於位置點N2投影至平面P上為位置點O2，而待測物T投影至平面P上為位置點N0，故位置點N2與待測物T之間的距離及位置點O2與位置點N0的距離相同，皆為r2。因此，由圖3A中可得知，d2
2＝r2
2＋h2
2＝(x2
2＋y2
2)＋h2
2-----（式二）。 另外，在圖4B中，若位置點O3的座標為(0,0)，待測物T的座標假設為(x3,y3)，則r3
2＝x3
2＋y3
2。同樣地，如圖4A所示，由於位置點N3投影至平面P上為位置點O3，而待測物T投影至平面P上為位置點N0，故位置點N3與待測物T之間的距離及位置點O3與位置點N0的距離相同，皆為r3。因此，由圖4A中可得知，d3
2＝r3
2＋h3
2＝(x3
2＋y3
2)＋h3
2-----（式三）。 由上述的方程式(一)、(二)、(三)所組成的聯立方程式中，由於d1、d2、d3可依據無線接收模組13接收到的無線訊號S1、S2、S3的接收信號強度指示（RSSI）經計算後得知，且無線傳輸模組11a、11b、11c與待測物T的高度差h1、h2、h3亦為已知（於此，h1＝h2＝h3），故可由聯立方程式中解出x1、y1、x2、y2、x3與y3的值而得到三點的座標(x1,y1)、(x2, y2)、(x3, y3)。然後，再採用相關演算法，例如三邊測量法計算得到待測物T的二維座標(x,y)的位置，配合上述得到的待測物T於z軸上的高度h0（h0＝Ht-h），可得知待測物T的三維座標(x,y,z)。 在上述實施例中，無線傳輸模組的數量為三個，三點即可定位出待測物T的位置，但是，若要得到更高的精準度，則可設置更多的無線傳輸模組。其中，無線傳輸模組的數量越多時，可得出更多個二維座標(x,y)，再利用例如平均方式得到一平均的位置座標，可更提高待測物T的位置準確度；或者，設置更多個第一氣壓感測器12，可得到更多個待測物T的高度資訊，再藉由平均方式得到更精準的待測物T於z軸上的高度，藉此提高待測物T的定位精準度。 承上，藉由本發明的三維定位裝置與方法，可以較簡易的方式得到待測物（例如人員或物件）於特定場域內的確切位置（三維位置），並具有定位精準度較高的優點。而在應用上，例如可偵測並定位出賣場內有多少人員及其位置，或者可偵測並定位出倉諸空間內物件位置，藉此可提供給賣場或倉諸在商品銷售時的統計或參考。 綜上所述，在本發明之三維定位裝置與方法中，透過該些無線傳輸模組設置該場域的不同位置，並分別發出無線訊號，更透過位於待測物上的無線接收模組分別接收該些無線訊號，且透過第一氣壓感測器感測到第一氣壓以及第二氣壓感測器感測到第二氣壓，使得控制模組可依據該些無線訊號、第一氣壓與第二氣壓計算出待測物於該場域的三維位置。因此，本發明的三維定位裝置與方法可以較簡易的方式得到待測物（例如人員或物件）於特定場域內的確切位置（三維位置），並具有定位精準度較高的優點，可提供給使用者作為後續工作時的參考。 以上所述僅為舉例性，而非為限制性者。任何未脫離本發明之精神與範疇，而對其進行之等效修改或變更，均應包含於後附之申請專利範圍中。
Hereinafter, the three-dimensional positioning device and method according to the preferred embodiment of the present invention will be described with reference to related drawings, wherein the same components will be described with the same reference symbols. Please refer to FIG. 1A to FIG. 1C, wherein FIG. 1A and FIG. 1B are functional block diagrams and three-dimensional schematic diagrams of a three-dimensional positioning device 1 according to a preferred embodiment of the present invention, and FIG. 1C is a three-dimensional schematic diagram of a preferred embodiment of the present invention. Schematic diagram of the process steps of the positioning method. As shown in FIG. 1A and FIG. 1B, the three-dimensional positioning device 1 can be used to detect the position of an object T in a field, and includes at least three wireless transmission modules 11a, 11b, 11c, and at least one first air pressure. A pressure altimeter 12, a wireless receiving module 13, a second air pressure sensor 14, and a control module 15. In addition, as shown in FIG. 1C, the three-dimensional positioning method of the present invention is applied to the three-dimensional positioning device 1 and can be used to detect the three-dimensional position of the object T in the field. The three-dimensional positioning method includes the following steps: each of the wireless transmission modules sends out a wireless signal (step S01); a first pressure is sensed by a first pressure sensor (step S02); and a second pressure sensor A second air pressure is sensed (step S03); the wireless signals are received by the wireless receiving module (step S04); and the object to be measured is calculated in the field based on the wireless signals, the first air pressure, and the second air pressure. The three-dimensional position of the domain (step S05). Hereinafter, detailed technical contents of the three-dimensional positioning device 1 and the three-dimensional positioning method of the present embodiment will be described. As shown in FIG. 1A and FIG. 1B, this embodiment takes three wireless transmission modules 11a, 11b, 11c and a first barometric sensor 12 as examples, but it is not limited to this. In different embodiments, In addition, the three-dimensional positioning device 1 may also include more than three wireless transmission modules 11a, 11b, 11c and more than one first air pressure sensor 12, which are not limited. In addition, the above-mentioned "field" is, for example, but not limited to, an indoor storage space, a store, an office, or other indoor space. The test object T is, for example, a person or an object, and the wireless receiving module 13 and the second air pressure sensor 14 are respectively disposed on the test object T. When the object to be measured T is a person, the wireless receiving module 13 and the second air pressure sensor 14 may be located in a mobile device carried by the person (for example, the mobile phone or tablet has the wireless receiving module 13 and the second air pressure sensor). Device 14), or the wireless receiving module 13 and the second barometric sensor 14 may also be a receiving and sensing device worn by a person (for example, a wireless receiving module 13 and a second Barometric pressure sensor 14), or a device in which a person additionally carries the wireless receiving module 13 and the second barometric pressure sensor 14 is not limited; in addition, when the object T to be measured is an object, the object may be installed with The wireless receiving module 13 and the second air pressure sensor 14. The wireless transmission modules 11a, 11b, and 11c are disposed at different positions in the field, and the wireless transmission modules 11a, 11b, and 11c can respectively emit a wireless signal S1, S2, and S3 (step S01). The wireless transmission modules 11a, 11b, and 11c may be wireless transmission modules such as Wi-Fi, ZigBee, or Bluetooth, or radio frequency (RF), or a telecommunications network, and are not limited. Therefore, the wireless signals S1, S2, and S3 can be sent through the wireless transmission modules 11a, 11b, and 11c, respectively. The first air pressure sensor 12 is adjacent to one of the wireless transmission modules 11a, 11b, and 11c, and the first air pressure sensor 12 can sense a first air pressure P1 (step S02). In this embodiment, the first air pressure sensor 12 is disposed next to the wireless transmission module 11a to sense the atmospheric pressure, and the height information of the position of the first air pressure sensor 12 can be obtained after conversion. Preferably, the first barometric pressure sensor 12 is a barometric altimeter, which can obtain the altitude of the installation position by sensing the atmospheric pressure. The wireless transmission modules 11a, 11b, 11c and the first air pressure sensor 12 may be located at the same height in the field, such as but not limited to being located at different positions on the ceiling. Preferably, the wireless transmission modules 11a, 11b, 11c and the first air pressure sensor 12 can be integrated in different lamps in the ceiling of the field, and the object to be measured T (the wireless reception module 13 and the second air pressure sensor) The detector 14) is located between the wireless transmission modules 11a, 11b, 11c and a plane (such as the ground) P of the field. The wireless transmission modules 11a, 11b, 11c and the first air pressure sensor 12 in this embodiment are located at the same height in the field. Therefore, as long as a first air pressure sensor 12 is provided, the wireless transmission module can be obtained. 11a, 11b, 11c. In different embodiments, one of the wireless transmission modules and the other of the wireless transmission modules may also be located at different heights in the field. If the wireless transmission modules 11a, 11b, and 11c are located at different heights, the wireless transmission modules of different heights also need to be equipped with the first air pressure sensor 12. For example, if the wireless transmission module 11b is located on a pillar, and the wireless transmission modules 11a, 11c are located on different ceiling lamps, and the installation height of the wireless transmission module 11b and the wireless transmission modules 11a, 11c are different, then One first air pressure sensor 12 is adjacent to the wireless transmission module 11 a, and another first air pressure sensor 12 is required to be adjacent to the wireless transmission module 11 b to obtain a wireless transmission mode through the first air pressure sensor 12. The height information of the groups 11a and 11c, and the height information of the wireless transmission module 11b is obtained through another first air pressure sensor 12. In addition, in another embodiment, when the heights of the three wireless transmission modules 11a, 11b, and 11c in the field are not the same, three first air pressure sensors 12 need to be respectively disposed adjacent to three. Wireless transmission modules 11a, 11b, 11c to obtain the height information of the three wireless transmission modules 11a, 11b, 11c respectively through the three first air pressure sensors 12, for subsequent calculation of the T of the object to be measured The use of position coordinates. In addition, the wireless transmission modules 11a, 11b, 11c and the first air pressure sensor 12 can be mounted on a ceiling lamp or a pillar. In different embodiments, they can also be mounted next to a smoke detector, for example. The invention is not limited to the air conditioner air outlet or other equipment. The second air pressure sensor 14 can sense a second air pressure P2 (step S03), and the wireless receiving module 13 can receive the wireless signals S1, S2, and S3 from the wireless transmission modules 11a, 11b, and 11c ( Step S04). Here, since the second air pressure sensor 14 is disposed on the object T, the atmospheric pressure sensed by the second air pressure sensor 14 is the atmospheric pressure at the height of the object T, and thus the object to be measured can be obtained. T's height information. Because the barometric pressure sensor (12, 14) senses the atmospheric pressure and learns that its altitude information is a technique well known to ordinary knowledgeable persons, or can be obtained by querying related data, the technical principles are not repeated here. In addition, the wireless receiving module 13 is provided corresponding to the wireless transmitting modules 11a, 11b, and 11c. For example, if the wireless transmission modules 11a, 11b, and 11c are Wi-Fi wireless transmission modules, the wireless receiving module 13 is a Wi-Fi wireless receiving module to receive the wireless transmission modules 11a, 11b, Wi-Fi wireless signals (S1, S2, S3) from 11c. It is worth mentioning that the sequence of steps S01, S02, and S03 described above is just an example. In different embodiments, the sequence of steps S01, S02, and S03 may also be, for example, S03, S02, S01, or S01, S03, S02, ... or other sequences, and it is not used to limit the present invention. The control module 15 is respectively coupled to the first air pressure sensor 12, the second air pressure sensor 14 and the wireless receiving module 13. The coupling may be a wired or wireless coupling, and wireless may be performed through a wireless transmission module such as Wi-Fi, or ZigBee, or Bluetooth, or radio frequency (RF), or a telecommunication network. In some embodiments, the control module 15 may be integrated with the wireless receiving module 13 and the second air pressure sensor 14 into a same component, such as being located in a mobile device carried by a person (object T), or a control module 15 can also be integrated into the same component with the wireless transmission modules 11a, 11b, 11c or the first air pressure sensor 12, or the control module 15 can be an independently set component as long as it can be wired or wirelessly with the first air pressure The sensor 12 and the second air pressure sensor 14 may be coupled to the wireless receiving module 13, and the present invention is not limited thereto. In this embodiment, the control module 15 and the wireless receiving module 13 are integrated into the same component (also located on the test object T. For example, a mobile device carried by a person includes the control module 15, the wireless receiving module 13, Second pressure sensor 14). Here, the control module 15 has computing capability and can include core control components, for example, it can include at least a central processing unit (CPU, such as a microprocessor) and a memory, or other control hardware, software, or firmware. . The control module 15 can calculate the three-dimensional position of the test object T in the field according to the wireless signals S1, S2, S3, the first air pressure P1, and the second air pressure P2 (step S05). As shown in FIG. 1B, the control module 15 can obtain the wireless transmission modules 11a, 11b, and 11c according to the received signal strength indications (RSSI) of the received wireless signals S1, S2, and S3, respectively. A distance d1, d2, d3 from the test object T. Because the detection equipment for detecting the received signal strength indicator (RSSI) is simple, the hardware cost is low, and a more accurate signal strength value can also be obtained by averaging multiple measurements. Therefore, the wireless signals S1, S2 received by the wireless receiving module 13 S3 can obtain RSSI ranging metric values between the wireless transmission modules 11a, 11b, and 11c and the wireless receiving module 13 (that is, the object to be measured T). After that, the control module 15 converts the distance measurement metric to obtain the distances d1, d2, and d3 between the object to be measured T and the wireless transmission modules 11a, 11b, and 11c. Because the conversion of the received signal strength indicator (RSSI) into a distance is a technique familiar to ordinary knowledgeable persons, or can be obtained by querying related information, the technical principles are not described here again. In addition, since the height information of the position of the first air pressure sensor 12 can be obtained through the first air pressure P1, and the height information of the position of the second air pressure sensor 14 can be obtained through the second air pressure P2, the control module 15 is more accessible. A height difference between the first air pressure sensor 12 and the second air pressure sensor 14 is obtained according to the first air pressure P1 and the second air pressure P2. In some embodiments, the accuracy of this height difference may be less than 20 cm, and in some special cases, it may even be less than 5 cm. In this embodiment, since the wireless transmission modules 11a, 11b, 11c and the first air pressure sensor 12 are located at the same height in the field, the heights of the wireless transmission modules 11a, 11b, 11c and the object T to be measured The differences h1, h2, and h3 are all the same, and the height difference Ht between the wireless transmission modules 11a, 11b, 11c and the plane P is equal and known. Therefore, the height (z-axis) h0 of the test object T from the plane P is also Can be known. Therefore, the control module 15 can further obtain the three-dimensional coordinate position of the object to be measured T in the field according to the distances d1, d2, d3 and the height difference (h1, h2, h3). Wherein, the distance between the wireless transmission modules 11a, 11b, 11c and the wireless receiving module 13 is represented by d, and the height difference between the first air pressure sensor 12 and the second air pressure sensor 14 is expressed by h , And when the two-dimensional coordinate of the object T on the plane P of the field is (x, y), the distance d, the height difference h, and the coordinate (x, y) will satisfy the following equation: d 2 = (x 2 + y 2) + h 2 , the following will be described again in detail. Please refer to FIG. 1B and cooperate with FIG. 2A and FIG. 2B, FIG. 3A and FIG. 3B, FIG. 4A and FIG. 4B, where FIG. 2A is the wireless transmission module 11a (first air pressure sensor) of the 3D positioning device 1 of FIG. 2B is a schematic side view of the test object T and the test object T, and FIG. 2B is a schematic diagram of the relative position of the test object T to the position point O1 when the test object T is projected onto the plane P, and FIG. 3A is a diagram In the three-dimensional positioning device 1 of 1B, a schematic side view of the wireless transmission module 11b and the test object T, and FIG. 3B is a three-dimensional positioning device 1 of FIG. 1B. When the test object T is projected onto the plane P, the position point O2 4A is a schematic side view of the wireless transmission module 11c and the object T in the three-dimensional positioning device 1 of FIG. 1B, and FIG. 4B is a projection of the object T in the three-dimensional positioning device 1 of FIG. 1B The schematic diagram of the relative position to the position point O3 when reaching the plane P. Among them, the position points N1, N2, N3 are at the same height as the object O to be measured, the position points N1, N2, N3 are projected onto the plane P to be the position points O1, O2, O3, and the object T to be projected onto the plane P is the position Point N0. In FIG. 2B, if the coordinate of the position point O1 is (0,0) and the coordinate of the test object T is assumed to be (x1, y1), then r1 2 = x1 2 + y1 2 . In addition, as shown in FIG. 2A, since the position point N1 is projected on the plane P as the position point O1, and the object T is projected on the plane P as the position point N0, the distance between the position point N1 and the object T is measured. And the distance between the position point O1 and the position point N0 is the same, both are r1 (in terms of the shape of the sphere, they are the radius of the sphere). Therefore, it can be known from FIG. 2A that d1 2 = r1 2 + h1 2 = (x1 2 + y1 2 ) + h1 2 ----- (Expression 1). In addition, in FIG. 3B, if the coordinate of the position point O2 is (0,0) and the coordinate of the test object T is assumed to be (x2, y2), r2 2 = x2 2 + y2 2 . Similarly, as shown in FIG. 3A, since the position point N2 is projected onto the plane P as the position point O2, and the test object T is projected onto the plane P as the position point N0, the distance between the position point N2 and the object T is The distance and the distance between the position point O2 and the position point N0 are the same, and they are both r2. Therefore, it can be known from FIG. 3A that d2 2 = r2 2 + h2 2 = (x2 2 + y2 2 ) + h2 2 ----- (Expression 2). In addition, in FIG. 4B, if the coordinate of the position point O3 is (0,0) and the coordinate of the test object T is assumed to be (x3, y3), r3 2 = x3 2 + y3 2 . Similarly, as shown in FIG. 4A, since the position point N3 is projected onto the plane P as the position point O3, and the test object T is projected onto the plane P as the position point N0, the distance between the position point N3 and the test object T is The distance and the distance between the position point O3 and the position point N0 are the same, and both are r3. Therefore, it can be known from FIG. 4A that d3 2 = r3 2 + h3 2 = (x3 2 + y3 2 ) + h3 2 ----- (Equation 3). In the simultaneous equations composed of the above equations (1), (2), and (3), since d1, d2, and d3 can be based on the received signal strengths of the wireless signals S1, S2, and S3 received by the wireless receiving module 13 The indication (RSSI) is calculated and the height differences h1, h2, h3 of the wireless transmission modules 11a, 11b, 11c and the object T are also known (here, h1 = h2 = h3), so Solve the values of x1, y1, x2, y2, x3, and y3 in the simultaneous equations to obtain the coordinates of three points (x1, y1), (x2, y2), (x3, y3). Then, a correlation algorithm is used, such as the trilateration method to calculate the position of the two-dimensional coordinate (x, y) of the test object T, and the height h0 (h0 = Ht) of the test object T on the z-axis is obtained in accordance with the above. -h), the three-dimensional coordinates (x, y, z) of the test object T can be obtained. In the above embodiment, the number of wireless transmission modules is three, and the position of the test object T can be located at three points. However, if higher accuracy is required, more wireless transmission modules can be set. . Among them, the larger the number of wireless transmission modules, the more two-dimensional coordinates (x, y) can be obtained, and the average position coordinates can be obtained by using, for example, the average method, which can further improve the position accuracy of the object T to be measured. ; Or, setting more first air pressure sensors 12 can obtain more height information of the object to be measured T, and then obtain a more accurate height of the object to be measured T on the z axis by averaging. Improve the positioning accuracy of the test object T. In conclusion, with the three-dimensional positioning device and method of the present invention, the exact position (three-dimensional position) of the object to be measured (such as a person or an object) in a specific field can be obtained in a relatively simple manner, and has the advantage of higher positioning accuracy. . In applications, for example, it can detect and locate how many people and their positions in the store, or can detect and locate the position of objects in the warehouse space, which can provide statistics to the store or warehouse at the time of product sales. Or reference. To sum up, in the three-dimensional positioning device and method of the present invention, different positions of the field are set through the wireless transmission modules, and wireless signals are sent respectively, and the wireless receiving modules located on the object to be measured are separately transmitted through the wireless transmission modules. The wireless signals are received, and the first air pressure is sensed by the first air pressure sensor and the second air pressure is sensed by the second air pressure sensor, so that the control module can respond to the wireless signals, the first air pressure, and the first air pressure. The two-dimensional pressure calculates the three-dimensional position of the object to be measured in the field. Therefore, the three-dimensional positioning device and method of the present invention can obtain the exact position (three-dimensional position) of the object to be measured (such as a person or an object) in a specific field in a relatively simple manner, and has the advantage of higher positioning accuracy, which can provide To the user as a reference for subsequent work. The above description is exemplary only, and not restrictive. Any equivalent modification or change made without departing from the spirit and scope of the present invention shall be included in the scope of the attached patent application.