TWI484377B

TWI484377B - Position detection method and system

Info

Publication number: TWI484377B
Application number: TW102115427A
Authority: TW
Original assignee: Sunrex Technology Corp
Priority date: 2013-04-30
Filing date: 2013-04-30
Publication date: 2015-05-11
Also published as: TW201441870A

Description

位置偵測方法及系統Position detection method and system

本發明是有關於一種偵測技術，特別是指一種位置偵測方法及系統。The invention relates to a detection technology, in particular to a position detection method and system.

參閱圖1與圖2，美國專利第7176907號揭露一種習知的被動式數位板指標系統，包括一個數位板1及一個無線指標設備(例如數位筆)2。Referring to Figures 1 and 2, a conventional passive tablet index system is disclosed in U.S. Patent No. 7,176,907, which includes a tablet 1 and a wireless indicator device (e.g., a digital pen).

無線指標設備2能夠利用於一個外來信號被其接收時所儲存的能量，發射一個對應外來信號且具有一個諧振頻率的信號。無線指標設備2包括一個可變電感21、兩個電容22、23及一個開關24。可變電感21的電感值反應無線指標設備2與數位板1間的碰觸壓力，且碰觸壓力愈大，可變電感器21的電感值愈小，諧振頻率愈大。當開關24導通時，電容23使諧振頻率變小。The wireless indicator device 2 is capable of transmitting a signal corresponding to an external signal and having a resonant frequency by the energy stored when an external signal is received. The wireless indicator device 2 includes a variable inductor 21, two capacitors 22, 23, and a switch 24. The inductance value of the variable inductor 21 reflects the contact pressure between the wireless index device 2 and the tablet 1, and the greater the contact pressure, the smaller the inductance value of the variable inductor 21, and the larger the resonance frequency. When the switch 24 is turned on, the capacitor 23 makes the resonance frequency small.

數位板1包括沿一個第一方向排列的多條第一天線11，及沿垂直於第一方向的一個第二方向排列的多條第二天線12。數位板1輪流經由第一天線11及第二天線12的全部或部分，朝無線指標設備2發射一個頻率固定的激發信號並接收來自無線指標設備2的一個對應激發信號的回應信號，以進行全域掃描或區域掃描。數位板1根據回應信號的能量得到無線指標設備2相對於數位板1的位置資訊，且根據回應信號的頻率得到無線指標設備2的操作狀態資訊，例如：無線指標設備2與數位板1間的碰觸壓力，及開關24是否導通。The tablet 1 includes a plurality of first antennas 11 arranged in a first direction, and a plurality of second antennas 12 arranged in a second direction perpendicular to the first direction. The tablet 1 in turn transmits a frequency-fixed excitation signal to the wireless indicator device 2 via a whole or part of the first antenna 11 and the second antenna 12 and receives a corresponding excitation signal from the wireless indicator device 2. The response signal for a global or regional scan. The tablet 1 obtains the position information of the wireless indicator device 2 relative to the tablet 1 according to the energy of the response signal, and obtains the operation status information of the wireless indicator device 2 according to the frequency of the response signal, for example, between the wireless indicator device 2 and the tablet 1. Touch the pressure and whether the switch 24 is turned on.

然而，習知的數位板指標系統具有以下缺點：(1)數位板1所得到的位置資訊及碰觸壓力之精確度較低，且數位板1所得到的開關24之狀態是錯誤的機率較高；(2)數位板1需使用較多開關13；及(3)數位板1需使用一個頻率/電壓轉換電路14來得到無線指標設備2的操作狀態資訊。However, the conventional tablet index system has the following disadvantages: (1) the accuracy of the position information and the touch pressure obtained by the tablet 1 is low, and the state of the switch 24 obtained by the tablet 1 is wrong. (2) The tablet 1 needs to use more switches 13; and (3) the tablet 1 needs to use a frequency/voltage conversion circuit 14 to obtain the operational status information of the wireless indicator device 2.

因此，本發明之目的即在提供一種位置偵測方法，可以改善先前技術的至少部分缺點。Accordingly, it is an object of the present invention to provide a position detection method that can ameliorate at least some of the disadvantages of the prior art.

於是，本發明位置偵測方法實現在一個位置偵測裝置。該位置偵測裝置包括多個天線單元。每一個天線單元包括至少一條天線。該等天線單元的天線沿同一方向排列。該位置偵測裝置在操作上與一個位置指示器相關聯。該位置指示器能夠利用於一個外來信號被其接收時所儲存的能量，發射一個對應該外來信號的信號。該位置偵測方法包含以下步驟：(A)經由該等天線單元中包括一個目標天線的一個目標天線單元，朝該位置指示器發射一個具有一個隨時間變化之頻率的第一激發信號及接收來自該位置指示器的一個對應該第一激發信號的第一回應信號；(B)根據該第一回應信號，決定一個對應該第一回應信號具有最大能量的目標頻率；(C)輪流經由該等天線單元中包括該目標天線單元的一部分天線單元，朝該位置指示器發射一個具有該目標頻率的第二激發信號及接收來自該位置指示器的一個對應該第二激發信號的第二回應信號；及(D)根據該第二回應信號，更新該目標天線，並得到該位置指示器相對於該位置偵測裝置的位置資訊。Therefore, the position detecting method of the present invention is implemented in a position detecting device. The position detecting device includes a plurality of antenna units. Each antenna unit includes at least one antenna. The antennas of the antenna elements are arranged in the same direction. The position detecting device is operatively associated with a position indicator. The position indicator can utilize a signal stored by an external signal when it is received, transmitting a signal corresponding to the incoming signal. The position detecting method comprises the following steps: (A) transmitting, via a target antenna unit including a target antenna in the antenna elements, a first excitation signal having a frequency varying with time toward the position indicator and receiving from a first response signal of the position indicator corresponding to the first excitation signal; (B) Determining, according to the first response signal, a target frequency corresponding to the first response signal having the maximum energy; (C) transmitting, via the antenna unit, a part of the antenna unit including the target antenna unit, transmitting one to the position indicator a second excitation signal of the target frequency and a second response signal corresponding to the second excitation signal from the position indicator; and (D) updating the target antenna according to the second response signal, and obtaining the position indication The position information of the device relative to the position detecting device.

而本發明之另一目的即在提供一種位置測系統，可以改善先前技術的至少部分缺點。Yet another object of the present invention is to provide a position measuring system that can ameliorate at least some of the disadvantages of the prior art.

於是，本發明位置偵測系統包含一個位置指示器及一個位置偵測裝置。該位置指示器能夠利用於一個外來信號被其接收時所儲存的能量，發射一個對應該外來信號的信號。該位置偵測裝置包括多個天線單元、一個發射單元、一個接收單元、一個切換單元及一個處理單元。該等天線單元各自包括至少一條天線。該等天線單元的天線沿同一方向排列。該發射單元根據一個發射控制信號產生一個激發信號。該激發信號的頻率與該發射控制信號相關聯。該切換單元電連接到該等天線單元、該發射單元及該接收單元，根據一個切換控制信號，建立該等天線單元中之一者與該發射單元及該接收單元間的連接，以致該發射單元經由該等天線單元中的該者，將該激發信號朝該位置指示器發射，並且該接收單元經由該等天線單元中的該者接收來自該位置指示器的一個對應該激發信號的回應信號。該接收單元偵測所接收到的該回應信號的能量，以產生一個偵測信號。該處理單元電連接到該發射單元、該接收單元及該切換單元，產生該發射控制信號與該切換控制信號，並將該發射控制信號與該切換控制信號分別輸出至該發射單元與該切換單元，該處理單元接收來自該接收單元的該偵測信號，並根據該偵測信號，得到該位置指示器相對於該位置偵測裝置的位置資訊。Thus, the position detecting system of the present invention includes a position indicator and a position detecting device. The position indicator can utilize a signal stored by an external signal when it is received, transmitting a signal corresponding to the incoming signal. The position detecting device comprises a plurality of antenna units, a transmitting unit, a receiving unit, a switching unit and a processing unit. Each of the antenna elements includes at least one antenna. The antennas of the antenna elements are arranged in the same direction. The transmitting unit generates an excitation signal based on a transmission control signal. The frequency of the excitation signal is associated with the emission control signal. The switching unit is electrically connected to the antenna unit, the transmitting unit and the receiving unit, and establishes a connection between one of the antenna units and the transmitting unit and the receiving unit according to a switching control signal, so that the transmitting unit The excitation signal is transmitted toward the position indicator via the one of the antenna elements, and the receiving unit receives a response signal from the position indicator corresponding to the excitation signal via the one of the antenna units. The receiving unit detects the energy of the received response signal to generate A detection signal. The processing unit is electrically connected to the transmitting unit, the receiving unit and the switching unit, generates the transmission control signal and the switching control signal, and outputs the transmission control signal and the switching control signal to the transmitting unit and the switching unit respectively The processing unit receives the detection signal from the receiving unit, and obtains position information of the position indicator relative to the position detecting device according to the detection signal.

本發明之功效在於：由於上述激發信號的頻率是可變的，即使該位置指示器的諧振頻率隨其操作狀態變化，仍能找到可使該位置指示器所發射的信號具有較大能量的目標頻率來進行掃描，因此所得到的該位置資訊之精確度較高。The effect of the present invention is that since the frequency of the above-mentioned excitation signal is variable, even if the resonance frequency of the position indicator changes with its operating state, it can find a target that can make the signal emitted by the position indicator have a larger energy. The frequency is scanned, so the accuracy of the obtained position information is high.

1‧‧‧數位板1‧‧‧ digital tablet

11‧‧‧第一天線11‧‧‧First antenna

12‧‧‧第二天線12‧‧‧second antenna

13‧‧‧開關13‧‧‧ switch

14‧‧‧頻率/電壓轉換電路14‧‧‧frequency/voltage conversion circuit

2‧‧‧無線指標設備2‧‧‧Wireless indicator equipment

21‧‧‧可變電感21‧‧‧Variable inductance

22、23‧‧‧電容22, 23‧‧‧ capacitor

24‧‧‧開關24‧‧‧ switch

3‧‧‧位置偵測裝置3‧‧‧ position detection device

31‧‧‧第一天線單元31‧‧‧First antenna unit

311‧‧‧天線311‧‧‧Antenna

32‧‧‧第二天線單元32‧‧‧Second antenna unit

321‧‧‧天線321‧‧‧Antenna

33‧‧‧發射單元33‧‧‧Emission unit

34‧‧‧接收單元34‧‧‧ Receiving unit

35‧‧‧切換單元35‧‧‧Switch unit

351‧‧‧開關351‧‧‧ switch

36‧‧‧處理單元36‧‧‧Processing unit

4‧‧‧位置指示器4‧‧‧ position indicator

41‧‧‧可變電感41‧‧‧Variable inductance

42、43‧‧‧電容42, 43‧‧‧ capacitor

44‧‧‧開關44‧‧‧ switch

51~56‧‧‧步驟51~56‧‧‧Steps

61~68‧‧‧步驟61~68‧‧‧Steps

681、682‧‧‧子步驟681, 682‧ ‧ substeps

本發明之其他的特徵及功效，將於參照圖式的實施方式中清楚地呈現，其中：圖1是一個示意電路圖，說明一種習知的數位板指標系統的一個數位板及一個無線指標設備；圖2是一個示意電路圖，說明無線指標設備；圖3是一個示意電路圖，說明本發明位置偵測系統之較佳實施例的一個位置偵測設備及一個位置指示器；圖4是一個示意電路圖，說明位置偵測設備的第一天線單元及第二天線單元；及圖5與圖6是流程圖，說明本發明位置偵測方法之較佳實施例。Other features and effects of the present invention will be apparent from the following description of the drawings, wherein: FIG. 1 is a schematic circuit diagram illustrating a tablet of a conventional tablet index system and a wireless indicator device; 2 is a schematic circuit diagram illustrating a wireless indicator device; FIG. 3 is a schematic circuit diagram illustrating a position detecting device and a position indicator of a preferred embodiment of the position detecting system of the present invention; FIG. 4 is a schematic circuit diagram, The first antenna unit and the second antenna unit of the position detecting device are illustrated; and FIGS. 5 and 6 are flowcharts illustrating a preferred embodiment of the position detecting method of the present invention.

參閱圖3與圖4，本發明位置偵測系統之較佳實施例包含一個位置偵測裝置(例如數位板)3及一個位置指示器(例如數位筆)4。Referring to Figures 3 and 4, a preferred embodiment of the position detecting system of the present invention includes a position detecting device (e.g., a tablet) 3 and a position indicator (e.g., a digital pen) 4.

位置指示器4能夠利用於一個外來信號被其接收時所儲存的能量，發射一個對應外來信號且具有一個諧振頻率的信號。在本實施例中，位置指示器4包括一個可變電感41、兩個電容42、43及一個開關44。可變電感41的電感值反應位置指示器4與位置偵測裝置3間的碰觸壓力，且碰觸壓力愈大，可變電感器41的電感值愈小，諧振頻率愈大。當開關44導通時，電容43使諧振頻率變小。The position indicator 4 is capable of transmitting a signal corresponding to an external signal and having a resonant frequency by the energy stored when an external signal is received. In the present embodiment, the position indicator 4 includes a variable inductor 41, two capacitors 42, 43 and a switch 44. The inductance value of the variable inductor 41 reflects the contact pressure between the position indicator 4 and the position detecting device 3, and the larger the contact pressure, the smaller the inductance value of the variable inductor 41, and the larger the resonance frequency. When the switch 44 is turned on, the capacitor 43 makes the resonance frequency small.

位置偵測裝置3包括多個第一天線單元31、多個第二天線單元32、一個發射單元33、一個接收單元44、一個切換單元35及一個處理單元36。The position detecting device 3 includes a plurality of first antenna units 31, a plurality of second antenna units 32, a transmitting unit 33, a receiving unit 44, a switching unit 35, and a processing unit 36.

每一個第一天線單元31包括至少一條天線311，圖4畫出每一個第一天線單元31包括兩條天線311的情況。第一天線單元31的天線311沿一個第一方向排列。每一個第二天線單元32包括至少一條天線321，圖4畫出每一個第二天線單元31包括兩條天線321的情況。第二天線單元32的天線321沿垂直於第一方向的一個第二方向排列。在本實施例中，當第一天線單元31及第二天線單元32中的每一者只包括一條天線311、321時，天線311、321的排列方式相同於美國專利第7176907號所揭露的排列方式(見圖1)，而當第一天線單元31及第二天線單元32中的每一者包括多條天線311、321時，天線311、321的排列方式相同於中華民國專利第I351632號所揭露的排列方式，此處不再多加說明。Each of the first antenna elements 31 includes at least one antenna 311, and FIG. 4 illustrates a case where each of the first antenna elements 31 includes two antennas 311. The antennas 311 of the first antenna unit 31 are arranged in a first direction. Each of the second antenna units 32 includes at least one antenna 321 , and FIG. 4 illustrates a case where each of the second antenna units 31 includes two antennas 321 . The antennas 321 of the second antenna unit 32 are arranged in a second direction perpendicular to the first direction. In this embodiment, when each of the first antenna unit 31 and the second antenna unit 32 includes only one antenna 311, 321 , the antennas 311 and 321 are arranged in the same manner as disclosed in US Pat. No. 7,176,907. Arrangement (see Fig. 1), and in the first antenna unit 31 and the second antenna unit 32 When each of the antennas includes a plurality of antennas 311 and 321 , the antennas 311 and 321 are arranged in the same manner as disclosed in the Patent No. I351632 of the Republic of China, and will not be further described herein.

發射單元33根據一個發射控制信號產生一個激發信號。激發信號的頻率及能量與發射控制信號相關聯。切換單元35電連接到第一天線單元31、第二天線單元32、發射單元33及接收單元34，根據一個切換控制信號，建立第一天線單元31及第二天線單元32中之一者與發射單元33及接收單元34間的連接，以致發射單元33經由第一天線單元31及第二天線單元32中的該者，將激發信號朝位置指示器4發射，並且接收單元34經由第一天線單元31及第二天線單元32中的該者接收來自位置指示器4的一個對應激發信號的回應信號。接收單元34偵測所接收到的回應信號的能量，以產生一個偵測信號。The transmitting unit 33 generates an excitation signal based on a transmission control signal. The frequency and energy of the excitation signal are associated with the emission control signal. The switching unit 35 is electrically connected to the first antenna unit 31, the second antenna unit 32, the transmitting unit 33, and the receiving unit 34, and establishes the first antenna unit 31 and the second antenna unit 32 according to a switching control signal. a connection between the transmitting unit 33 and the receiving unit 34 such that the transmitting unit 33 transmits the excitation signal toward the position indicator 4 via the one of the first antenna unit 31 and the second antenna unit 32, and the receiving unit 34 receives a response signal from the position indicator 4 corresponding to the excitation signal via the one of the first antenna unit 31 and the second antenna unit 32. The receiving unit 34 detects the energy of the received response signal to generate a detection signal.

在本實施例中，切換單元35包括分別對應第一天線單元31及第二天線單元32的多個開關351。每一個開關351具有一個電連接到第一天線單元31及第二天線單元32中相對應之一者的第一端，及一個電連接到發射單元33及接收單元34的第二端。每一個開關351是否導通與切換控制信號相關聯。In the embodiment, the switching unit 35 includes a plurality of switches 351 corresponding to the first antenna unit 31 and the second antenna unit 32, respectively. Each of the switches 351 has a first end electrically connected to a corresponding one of the first antenna unit 31 and the second antenna unit 32, and a second end electrically connected to the transmitting unit 33 and the receiving unit 34. Whether each switch 351 is turned on is associated with a switching control signal.

處理單元36電連接到發射單元33、接收單元34及切換單元35，產生發射控制信號與切換控制信號，並將發射控制信號與切換控制信號分別輸出至發射單元33與切換單元35。處理單元36接收來自接收單元34的偵測信號，並根據偵測信號，得到位置指示器4相對於位置偵測裝置3的位置資訊。The processing unit 36 is electrically connected to the transmitting unit 33, the receiving unit 34, and the switching unit 35, generates a transmission control signal and a switching control signal, and outputs the transmission control signal and the switching control signal to the transmitting unit 33 and the switching unit 35, respectively. Processing unit 36 receives the detection signal from receiving unit 34 And according to the detection signal, the position information of the position indicator 4 relative to the position detecting device 3 is obtained.

參閱圖3至圖6，本發明位置偵測方法之較佳實施例實現在位置偵測裝置3，包含步驟51~68，其中，步驟51~57用於全域掃描，步驟61~68用於區域掃描。Referring to FIG. 3 to FIG. 6, a preferred embodiment of the position detecting method of the present invention is implemented in the position detecting device 3, including steps 51-68, wherein steps 51-57 are used for global scanning, and steps 61-68 are used for regions. scanning.

在步驟51中，處理單元36藉由發射控制信號來控制發射單元33，以使得發射單元33產生一個測試激發信號作為激發信號。測試激發信號的頻率是選自包括多個不同頻率的第一組頻率中的一者，且測試激發信號的能量為最大。In step 51, processing unit 36 controls firing unit 33 by transmitting a control signal such that firing unit 33 produces a test firing signal as an excitation signal. The frequency of the test excitation signal is selected from one of the first set of frequencies including a plurality of different frequencies, and the energy of the test excitation signal is maximum.

在步驟52中，處理單元36藉由切換控制信號來控制切換單元35，以使得切換單元35輪流建立第一天線單元31與發射單元33及接收單元34間的連接。In step 52, processing unit 36 controls switching unit 35 by switching control signals such that switching unit 35 alternately establishes a connection between first antenna unit 31 and transmitting unit 33 and receiving unit 34.

測試激發信號輪流經由第一天線單元31朝位置指示器4發射，以致接收單元34接收來自位置指示器4的一個對應測試激發信號的第一測試回應信號作為回應信號。接收單元34根據第一測試回應信號產生偵測信號。The test excitation signal is transmitted in turn via the first antenna unit 31 towards the position indicator 4 such that the receiving unit 34 receives a first test response signal from the position indicator 4 corresponding to the test excitation signal as a response signal. The receiving unit 34 generates a detection signal according to the first test response signal.

在步驟53中，處理單元36根據來自接收單元34的偵測信號，判斷第一測試回應信號的能量最大值是否大於一個預設第一能量門檻值。如果是，流程前進到步驟54，如果否，流程前進到步驟57。In step 53, the processing unit 36 determines whether the maximum energy of the first test response signal is greater than a preset first energy threshold based on the detection signal from the receiving unit 34. If so, the flow proceeds to step 54, and if not, the flow proceeds to step 57.

在步驟54中，處理單元36藉由切換控制信號來控制切換單元35，以使得切換單元35輪流建立第二天線單元32與發射單元33及接收單元34間的連接。In step 54, the processing unit 36 controls the switching unit 35 by switching the control signals such that the switching unit 35 alternately establishes the connection between the second antenna unit 32 and the transmitting unit 33 and the receiving unit 34.

測試激發信號輪流經由第二天線單元32朝位置指示器4發射，以致接收單元34接收來自位置指示器4的一個對應測試激發信號的第二測試回應信號作為回應信號。接收單元34根據第二測試回應信號產生偵測信號。The test excitation signal is alternately transmitted via the second antenna unit 32 towards the position indicator 4 such that the receiving unit 34 receives a second test response signal from the position indicator 4 corresponding to the test excitation signal as a response signal. The receiving unit 34 generates a detection signal according to the second test response signal.

在步驟55中，處理單元36根據來自接收單元34的偵測信號，判斷第二測試回應信號的能量最大值是否大於預設第一能量門檻值。如果是，流程前進到步驟56，如果否，流程前進到步驟57。In step 55, the processing unit 36 determines whether the maximum energy of the second test response signal is greater than a preset first energy threshold based on the detection signal from the receiving unit 34. If so, the flow proceeds to step 56, and if not, the flow proceeds to step 57.

在步驟56中，處理單元36根據來自接收單元的偵測信號，決定第一天線單元31的所有天線311中最接近位置指示器4的一者作為一個第一目標天線，及第二天線單元32的所有第二天線321中最接近位置指示器4的一者作為一個第二目標天線。流程前進到步驟61。In step 56, the processing unit 36 determines, according to the detection signal from the receiving unit, one of all the antennas 311 of the first antenna unit 31 that is closest to the position indicator 4 as a first target antenna, and the second antenna. One of all the second antennas 321 of the unit 32 closest to the position indicator 4 serves as a second target antenna. The flow proceeds to step 61.

在步驟57中，處理單元36藉由發射控制信號來控制發射單元33，以使得發射單元33將測試激發信號的頻率改變為第一組頻率中未被選用者的其中一者。流程前進到步驟52，以使得步驟52~57重複進行，直到第一目標天線及第二目標天線被決定。In step 57, processing unit 36 controls firing unit 33 by transmitting a control signal such that transmitting unit 33 changes the frequency of the test firing signal to one of the first set of frequencies that is not selected. Flow proceeds to step 52 to cause steps 52-57 to repeat until the first target antenna and the second target antenna are determined.

在步驟61中，處理單元36藉由發射控制信號及切換控制信號來控制發射單元33及切換單元35，以使得切換單元35建立第一天線單元31中包括第一目標天線的一個第一目標天線單元與發射單元33及接收單元34間的連接，並使得發射單元33產生一個第一激發信號作為激發信號。第一激發信號的頻率隨時間在第一組頻率中變換。In step 61, the processing unit 36 controls the transmitting unit 33 and the switching unit 35 by transmitting a control signal and a switching control signal, so that the switching unit 35 establishes a first target including the first target antenna in the first antenna unit 31. The connection between the antenna unit and the transmitting unit 33 and the receiving unit 34 causes the transmitting unit 33 to generate a first excitation signal as an excitation signal. The frequency of the first excitation signal is transformed over time in the first set of frequencies.

第一激發信號經由第一目標天線單元朝位置指示器4發射，以致接收單元34經由第一目標天線單元接收來自位置指示器4的一個對應第一激發信號的第一回應信號作為回應信號。接收單元34根據第一回應信號產生偵測信號。The first excitation signal is transmitted to the position indicator 4 via the first target antenna unit such that the receiving unit 34 receives a first response signal from the position indicator 4 corresponding to the first excitation signal as a response signal via the first target antenna unit. The receiving unit 34 generates a detection signal according to the first response signal.

在步驟62中，處理單元36根據來自接收單元34的偵測信號，從第一組頻率決定一個對應第一回應信號具有最大能量的目標頻率。In step 62, the processing unit 36 determines, based on the detection signal from the receiving unit 34, a target frequency having a maximum energy corresponding to the first response signal from the first group of frequencies.

在步驟63中，處理單元36根據來自接收單元34的偵測信號，判斷第一回應信號的能量最大值是否大於一個預設第二能量門檻值。如果是，流程前進到步驟64，如果否，流程前進到步驟51。In step 63, the processing unit 36 determines whether the maximum energy of the first response signal is greater than a preset second energy threshold based on the detection signal from the receiving unit 34. If so, the flow proceeds to step 64, and if not, the flow proceeds to step 51.

在步驟64中，處理單元36根據來自接收單元34的偵測信號，藉由發射控制信號來控制發射單元33，以使得發射單元33改變激發信號的能量。當第一回應信號的能量最大值與預設第二能量門檻值的差異較大時，激發信號的能量被降低，而當第一回應信號的能量最大值與預設第二能量門檻值的差異較小時，激發信號的能量被提高。In step 64, the processing unit 36 controls the transmitting unit 33 by transmitting a control signal in accordance with the detection signal from the receiving unit 34, so that the transmitting unit 33 changes the energy of the excitation signal. When the difference between the maximum energy value of the first response signal and the preset second energy threshold is large, the energy of the excitation signal is lowered, and when the maximum energy of the first response signal is different from the preset second energy threshold When smaller, the energy of the excitation signal is increased.

在步驟65中，處理單元36藉由發射控制信號及切換控制信號來控制發射單元33與切換單元35，以使得發射單元33產生一個具有目標頻率的第二激發信號作為激發信號，並使得切換單元35輪流建立第一天線單元31中包括第一目標天線單元的一部分第一天線單元及第二天線單元32中包括一個第二目標天線單元的一部分第二天線單元與發射單元33及接收單元34間的連接。第二目標天線單元包括第二目標天線。In step 65, the processing unit 36 controls the transmitting unit 33 and the switching unit 35 by transmitting a control signal and a switching control signal, so that the transmitting unit 33 generates a second excitation signal having a target frequency as an excitation signal, and causes the switching unit 35, in turn, establishing a part of the first antenna unit including the first target antenna unit in the first antenna unit 31 and a part of the second antenna unit including the second target antenna unit in the second antenna unit 32 The connection between the element and the transmitting unit 33 and the receiving unit 34. The second target antenna unit includes a second target antenna.

第二激發信號輪流經由該部分第一天線單元31及該部分第二天線單元32朝位置指示器4發射，以致接收單元34接收來自位置指示器4的一個對應第二激發信號的第二回應信號作為回應信號。接收單元34根據第二回應信號產生偵測信號。The second excitation signal is alternately transmitted via the portion of the first antenna unit 31 and the portion of the second antenna unit 32 toward the position indicator 4 such that the receiving unit 34 receives a second corresponding excitation signal from the position indicator 4. The response signal is used as a response signal. The receiving unit 34 generates a detection signal according to the second response signal.

在步驟66中，處理單元36根據偵測信號更新第一目標天線及第二目標天線，並得到位置指示器4相對於位置偵測裝置3的位置資訊。In step 66, the processing unit 36 updates the first target antenna and the second target antenna according to the detection signal, and obtains position information of the position indicator 4 relative to the position detecting device 3.

在本實施例中，處理單元36利用以下公式得到位置指示器4相對於位置偵測裝置3的位置資訊：其中，下標x表示與第一天線單元31相關，下標y表示與第二天線單元32相關，P為位置指示器4相對於位置偵測裝置3的位置資訊，LU為天線單元31、32的天線311、312中任兩相鄰天線間的期望解析度，n為目標天線的編號，E3為經由目標天線所接收到的第二回應信號的能量大小，E1、E2及E4分別為經由該部分天線單元31、32中編號為n-2、n-1及n+1的天線所接收到的第二回應信號的能量大小。In the present embodiment, the processing unit 36 obtains the position information of the position indicator 4 relative to the position detecting device 3 by using the following formula: The subscript x is associated with the first antenna unit 31, the subscript y is associated with the second antenna unit 32, P is the position information of the position indicator 4 relative to the position detecting device 3, and LU is the antenna unit 31. The desired resolution between two adjacent antennas of the antennas 311 and 312 of 32, n is the number of the target antenna, and E3 is the energy of the second response signal received via the target antenna, and E1, E2, and E4 are respectively The amount of energy of the second response signal received via the antennas numbered n-2, n-1, and n+1 of the partial antenna elements 31,32.

在步驟67中，處理單元36藉由發射控制信號及切換控制信號來控制發射單元33及切換單元35，以使得切換單元35建立第一目標天線單元及第二目標天線單元中的一者與發射單元33及接收單元34間的連接，並使得發射單元33產生一個第三激發信號作為激發信號。第三激發信號的頻率隨時間在第二組頻率間變換。第二組頻率包括多個不同頻率，其中一者為目標頻率。In step 67, the processing unit 36 controls the transmitting unit 33 and the switching unit 35 by transmitting a control signal and a switching control signal, so that the switching unit 35 establishes one of the first target antenna unit and the second target antenna unit and transmits. The connection between the unit 33 and the receiving unit 34 causes the transmitting unit 33 to generate a third excitation signal as an excitation signal. The frequency of the third excitation signal is transformed between the second set of frequencies over time. The second set of frequencies includes a plurality of different frequencies, one of which is the target frequency.

第三激發信號經由第一目標天線單元及第二目標天線單元中的該者朝位置指示器4發射，以致接收單元34接收來自位置指示器4的一個對應第三激發信號的第三回應信號作為回應信號。接收單元34根據第三回應信號產生偵測信號。The third excitation signal is transmitted to the position indicator 4 via the one of the first target antenna unit and the second target antenna unit, such that the receiving unit 34 receives a third response signal from the position indicator 4 corresponding to the third excitation signal as Response signal. The receiving unit 34 generates a detection signal according to the third response signal.

在步驟68中，處理單元36根據偵測信號得到位置指示器4的操作狀態資訊。流程前進到步驟61。In step 68, the processing unit 36 obtains the operational status information of the position indicator 4 based on the detection signal. The flow proceeds to step 61.

在本實施例中，位置指示器4的操作狀態資訊包括位置指示器4與位置偵測裝置3間的碰觸壓力，及開關44是否導通。步驟68包括子步驟681、682。In the present embodiment, the operational status information of the position indicator 4 includes the contact pressure between the position indicator 4 and the position detecting device 3, and whether the switch 44 is turned on. Step 68 includes sub-steps 681, 682.

在子步驟681中，處理單元36根據偵測信號，利用以下公式得到一個操作狀態值：PR=PL×{(Ea-Eb)/[(Ea-Eb)+(Ea-Ec)]}+Po，其中，PR是操作狀態值，PL為期望解析度，Ea為第三回應信號的能量最大值，Eb為第三回應信號與第二組頻率中的一個小於Ea所對應頻率且差異最小的頻率相對應之能量大小，Ec為第三回應信號與第二組頻率中的一個大於Ea 所對應頻率且差異最小的頻率相對應之能量大小，Po為偏移值。In sub-step 681, processing unit 36 obtains an operational state value based on the detected signal using the following formula: PR = PL × {(Ea-Eb) / [(Ea-Eb) + (Ea-Ec)]} + Po Where PR is the operational state value, PL is the desired resolution, Ea is the energy maximum of the third response signal, and Eb is the frequency of the third response signal and one of the second set of frequencies less than the frequency corresponding to Ea and having the smallest difference Corresponding energy magnitude, Ec is the third response signal and one of the second set of frequencies is greater than Ea The energy corresponding to the frequency corresponding to the smallest difference and the Po is the offset value.

在子步驟682中，處理單元36根據操作狀態值，得到位置指示器4的操作狀態資訊。In sub-step 682, processing unit 36 obtains operational status information for position indicator 4 based on the operational status value.

以下舉一個例子說明。假設在位置指示器4與位置偵測裝置3間的碰觸壓力為0、開關44不導通時，位置指示器4的諧振頻率為550KHz，在位置指示器4與位置偵測裝置3間的碰觸壓力為最大、開關44不導通時，位置指示器4的諧振頻率為560KHz，在位置指示器4與位置偵測裝置3間的碰觸壓力為0、開關44導通時，位置指示器4的諧振頻率為530KHz，而在位置指示器4與位置偵測裝置3間的碰觸壓力為最大、開關44導通時，位置指示器4的諧振頻率為540KHz。在設計時，可以選擇第一組頻率包括520KHz、550KHz及570KHz，當目標頻率為520KHz時，第二組頻率包括520KHz、530KHz、540KHz及550KHz，當目標頻率為550KHz時，第二組頻率包括530KHz、540KHz、550KHz及560KHz，而當目標頻率為570KHz時，第二組頻率包括540KHz、550KHz、560KHz及570KHz。參數Ea、Eb、Ec、PL、Po、PR及位置指示器4的操作狀態資訊如表1所示。The following is an example. It is assumed that when the contact pressure between the position indicator 4 and the position detecting device 3 is 0 and the switch 44 is not conducting, the resonance frequency of the position indicator 4 is 550 KHz, and the contact between the position indicator 4 and the position detecting device 3 is encountered. When the contact pressure is maximum and the switch 44 is not conducting, the resonance frequency of the position indicator 4 is 560 KHz, and when the contact pressure between the position indicator 4 and the position detecting device 3 is 0, and the switch 44 is turned on, the position indicator 4 is The resonance frequency is 530 kHz, and when the contact pressure between the position indicator 4 and the position detecting device 3 is maximum and the switch 44 is turned on, the resonance frequency of the position indicator 4 is 540 kHz. In design, the first set of frequencies can be selected to include 520KHz, 550KHz and 570KHz. When the target frequency is 520KHz, the second set of frequencies includes 520KHz, 530KHz, 540KHz and 550KHz. When the target frequency is 550KHz, the second set of frequencies includes 530KHz. 540KHz, 550KHz and 560KHz, and when the target frequency is 570KHz, the second group of frequencies includes 540KHz, 550KHz, 560KHz and 570KHz. The operational status information of the parameters Ea, Eb, Ec, PL, Po, PR and position indicator 4 is shown in Table 1.

綜上所述，上述實施例具有以下優點：(1)由於位置偵測裝置3所發射的激發信號之頻率是可變的，即使位置指示器4的諧振頻率隨其操作狀態變化，位置偵測裝置3仍能找到可使位置指示器4所發射的信號具有較大能量的目標頻率來進行掃描，因此位置偵測裝置3所得到的位置資訊及碰觸壓力之精確度較高，且位置偵測裝置3所得到的開關44之狀態是錯誤的機率較低；(2)當每一個天線單元31、32包括多條天線311、312時，位置偵測裝置3需使用的開關351之數目會少於天線311、312的數目，因此位置偵測裝置3可以使用較少開關351，另外，當位置偵測裝置3的尺寸改變時，可以只需增加每一個天線單元31、32所包括的天線311、312之數目，而不需改變發射單元33、接收單元34、切換單元35及處理單元36的電路設計；及(3)位置偵測裝置3根據回應信號的能量來得到位置指示器4的操作狀態資訊，因此不需使用一個頻率/電壓轉換電路。所以上述實施例確實能達成本發明之目的。In summary, the above embodiment has the following advantages: (1) Since the frequency of the excitation signal emitted by the position detecting device 3 is variable, even if the resonance frequency of the position indicator 4 changes with its operating state, the position detection The device 3 can still find the target frequency that can make the signal emitted by the position indicator 4 have a larger energy to scan, so the position information and the contact pressure obtained by the position detecting device 3 are more accurate, and the position detection is high. The state of the switch 44 obtained by the measuring device 3 is low, and the probability of error is low; (2) when each antenna unit 31, 32 includes a plurality of antennas 311, 312, the number of switches 351 to be used by the position detecting device 3 will be The number of the antennas 311, 312 is less than the number of the antennas 311, 312. Therefore, the position detecting device 3 can use fewer switches 351. In addition, when the size of the position detecting device 3 is changed, it is only necessary to increase the antenna included in each of the antenna units 31, 32. The number of 311, 312 does not need to change the circuit design of the transmitting unit 33, the receiving unit 34, the switching unit 35, and the processing unit 36; and (3) the position detecting device 3 obtains the position indicator 4 according to the energy of the response signal. For status information, and therefore without the use of a frequency / voltage converter Circuit. Therefore, the above embodiments can achieve the object of the present invention.

惟以上所述者，僅為本發明之較佳實施例而已，當不能以此限定本發明實施之範圍，即大凡依本發明申請專利範圍及專利說明書內容所作之簡單的等效變化與修飾，皆仍屬本發明專利涵蓋之範圍內。The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent changes and modifications made by the patent application scope and patent specification content of the present invention, All remain within the scope of the invention patent.

61~68‧‧‧步驟61~68‧‧‧Steps

681、682‧‧‧子步驟681, 682‧ ‧ substeps

Claims

一種位置偵測方法，實現在一個位置偵測裝置，該位置偵測裝置包括多個天線單元，每一個天線單元包括至少一條天線，該等天線單元的天線沿同一方向排列，該位置偵測裝置在操作上與一個位置指示器相關聯，該位置指示器能夠利用於一個外來信號被其接收時所儲存的能量，發射一個對應該外來信號的信號，該位置偵測方法包含以下步驟：(A)經由該等天線單元中包括一個目標天線的一個目標天線單元，朝該位置指示器發射一個具有一個隨時間變化之頻率的第一激發信號及接收來自該位置指示器的一個對應該第一激發信號的第一回應信號；(B)根據該第一回應信號，決定一個對應該第一回應信號具有最大能量的目標頻率；(C)輪流經由該等天線單元中包括該目標天線單元的一部分天線單元，朝該位置指示器發射一個具有該目標頻率的第二激發信號及接收來自該位置指示器的一個對應該第二激發信號的第二回應信號；(D)根據該第二回應信號，更新該目標天線，並得到該位置指示器相對於該位置偵測裝置的位置資訊；(E)經由該目標天線單元，朝該位置指示器發射一個具有一個隨時間變化之頻率的第三激發信號及接收來自該位置指示器的一個對應該第三激發信號的第三回應信號，該第三激發信號的頻率涵蓋該目標頻率；及 (F)根據該第三回應信號，得到該位置指示器的操作狀態資訊。 A position detecting method is implemented in a position detecting device, the position detecting device includes a plurality of antenna units, each antenna unit includes at least one antenna, and antennas of the antenna units are arranged in the same direction, and the position detecting device Operationally associated with a position indicator capable of utilizing the energy stored by an external signal as it is received, transmitting a signal corresponding to the external signal, the position detection method comprising the steps of: (A Transmitting a first excitation signal having a frequency that varies with time and receiving a corresponding first excitation from the position indicator via a target antenna unit including a target antenna in the antenna elements a first response signal of the signal; (B) determining, according to the first response signal, a target frequency having a maximum energy corresponding to the first response signal; (C) rotating a portion of the antenna including the target antenna unit in the antenna unit in turn a unit that emits a second excitation signal having the target frequency and the connection to the position indicator a second response signal corresponding to the second excitation signal from the position indicator; (D) updating the target antenna according to the second response signal, and obtaining position information of the position indicator relative to the position detecting device (E) transmitting, via the target antenna unit, a third excitation signal having a frequency that varies with time toward the position indicator and a third response signal corresponding to a third excitation signal from the position indicator, The frequency of the third excitation signal covers the target frequency; and (F) obtaining operation state information of the position indicator according to the third response signal.

如請求項1所述的位置偵測方法，其中，在步驟(D)中，是利用以下公式得到該位置指示器相對於該位置偵測裝置的位置資訊：其中，P為該位置指示器相對於該位置偵測裝置的位置資訊，LU為該等天線單元的天線中任兩相鄰天線間的期望解析度，n為該目標天線的編號，E3為經由該目標天線所接收到的該第二回應信號的能量大小，E1、E2及E4分別為經由該部分天線單元中編號為n-2、n-1及n+1的天線所接收到的該第二回應信號的能量大小。The position detecting method according to claim 1, wherein in the step (D), the position information of the position indicator relative to the position detecting device is obtained by using the following formula: Where P is the position information of the position indicator relative to the position detecting device, LU is the desired resolution between any two adjacent antennas of the antenna elements, n is the number of the target antenna, and E3 is via The energy of the second response signal received by the target antenna, E1, E2, and E4 are respectively received by the antennas numbered n-2, n-1, and n+1 in the partial antenna unit. The magnitude of the energy of the response signal.

如請求項1所述的位置偵測方法，其中，步驟(F)包括以下子步驟：(F1)根據該第三回應信號，利用以下公式，得到一個操作狀態值，PR=PL×{(Ea-Eb)/[(Ea-Eb)+(Ea-Ec)]}+Po，其中，PR是該操作狀態值，PL為期望解析度，Ea為該第三回應信號的能量最大值，Eb為該第三回應信號與該第三激發信號的一個小於Ea所對應頻率且差異最小的頻率相對應之能量大小，Ec為該第三回應信號與該第三激發信號的一個大於Ea所對應頻率且差異最小的頻率相對應之能量大小， Po為偏移值；(F2)根據該操作狀態值，得到該位置指示器的操作狀態資訊。 The position detecting method according to claim 1, wherein the step (F) comprises the following substeps: (F1) obtaining an operation state value according to the third response signal by using the following formula, PR=PL×{(Ea) -Eb)/[(Ea-Eb)+(Ea-Ec)]}+Po, where PR is the operational state value, PL is the desired resolution, Ea is the energy maximum of the third response signal, and Eb is The third response signal is equal to a frequency of the third excitation signal that is less than the frequency corresponding to Ea and has the smallest difference, and Ec is a frequency of the third response signal and the third excitation signal that is greater than Ea and The frequency of the smallest difference corresponds to the amount of energy, Po is an offset value; (F2) according to the operation state value, the operation state information of the position indicator is obtained.

一種位置偵測方法，實現在一個位置偵測裝置，該位置偵測裝置包括多個天線單元，每一個天線單元包括至少一條天線，該等天線單元的天線沿同一方向排列，該位置偵測裝置在操作上與一個位置指示器相關聯，該位置指示器能夠利用於一個外來信號被其接收時所儲存的能量，發射一個對應該外來信號的信號，該位置偵測方法包含以下步驟：(A)產生一個測試激發信號，該測試激發信號的頻率是選自多個不同頻率中的一者；(B)輪流經由該等天線單元，朝該位置指示器發射該測試激發信號並接收來自該位置指示器的一個對應該測試激發信號的測試回應信號；(C)判斷該測試回應信號的能量最大值是否大於一個預設能量門檻值；(D)當該測試回應信號的能量最大值大於該預設能量門檻值時，根據該測試回應信號，決定該等天線單元的所有天線中最接近該位置指示器的一者作為一個目標天線；(E)當該測試回應信號的能量最大值不大於該預設能量門檻值時，將該測試激發信號的頻率改變為該等不同頻率中未被選用者的其中一者； (F)重複步驟(B)至(E)，直到該目標天線被決定；(G)經由該等天線單元中包括該目標天線的一個目標天線單元，朝該位置指示器發射一個具有一個隨時間變化之頻率的第一激發信號及接收來自該位置指示器的一個對應該第一激發信號的第一回應信號；(H)根據該第一回應信號，決定一個對應該第一回應信號具有最大能量的目標頻率；(I)輪流經由該等天線單元中包括該目標天線單元的一部分天線單元，朝該位置指示器發射一個具有該目標頻率的第二激發信號及接收來自該位置指示器的一個對應該第二激發信號的第二回應信號；及(J)根據該第二回應信號，更新該目標天線，並得到該位置指示器相對於該位置偵測裝置的位置資訊。 A position detecting method is implemented in a position detecting device, the position detecting device includes a plurality of antenna units, each antenna unit includes at least one antenna, and antennas of the antenna units are arranged in the same direction, and the position detecting device Operationally associated with a position indicator capable of utilizing the energy stored by an external signal as it is received, transmitting a signal corresponding to the external signal, the position detection method comprising the steps of: (A Generating a test excitation signal having a frequency selected from one of a plurality of different frequencies; (B) transmitting, via the antenna elements, the test excitation signal to the position indicator and receiving from the position A pair of indicators corresponding to the test response signal of the test signal; (C) determining whether the maximum energy value of the test response signal is greater than a predetermined energy threshold; (D) when the maximum energy value of the test response signal is greater than the pre- When the energy threshold is set, according to the test response signal, the closest of the antennas of the antenna elements to the location is determined. One of the indicators acts as a target antenna; (E) when the maximum energy of the test response signal is not greater than the preset energy threshold, the frequency of the test excitation signal is changed to an unselected one of the different frequencies One of them; (F) repeating steps (B) through (E) until the target antenna is determined; (G) transmitting, via the target antenna unit including the target antenna, one of the antenna elements to the position indicator with one over time a first excitation signal of a varying frequency and a first response signal corresponding to the first excitation signal from the position indicator; (H) determining, according to the first response signal, a maximum energy corresponding to the first response signal a target frequency; (I) alternately transmitting a second excitation signal having the target frequency to the position indicator via a portion of the antenna elements including the target antenna unit and receiving a pair from the position indicator The second response signal of the second excitation signal should be; and (J) updating the target antenna according to the second response signal, and obtaining position information of the position indicator relative to the position detecting device.

一種位置偵測系統，包含：一個位置指示器，能夠利用於一個外來信號被其接收時所儲存的能量，發射一個對應該外來信號的信號；及一個位置偵測裝置，包括多個天線單元，各自包括至少一條天線，該等天線單元的天線沿同一方向排列，一個發射單元，根據一個發射控制信號產生一個激發信號，該激發信號的頻率與該發射控制信號相關聯，一個接收單元，一個切換單元，電連接到該等天線單元、該發射單元及該接收單元，根據一個切換控制信號，建立該等天線單元中之一者與該發射單元及該接收單元間的連接，以致該發射單元經由該等天線單元中的該者，將該激發信號朝該位置指示器發射，並且該接收單元經由該等天線單元中的該者接收來自該位置指示器的一個對應該激發信號的回應信號，其中，該接收單元偵測所接收到的該回應信號的能量，以產生一個偵測信號，及一個處理單元，電連接到該發射單元、該接收單元及該切換單元，產生該發射控制信號與該切換控制信號，並將該發射控制信號與該切換控制信號分別輸出至該發射單元與該切換單元，該處理單元接收來自該接收單元的該偵測信號，並根據該偵測信號，得到該位置指示器相對於該位置偵測裝置的位置資訊；其中，該處理單元藉由該發射控制信號及該切換控制信號來控制該發射單元及該切換單元，以使得該切換單元建立該等天線單元中包括一個目標天線的一個目標天線單元與該發射單元及該接收單元間之連接，並使得該發射單元產生其頻率隨時間在第一組頻率中變換的該激發信號，該處理單元根據來自該接收單元的該偵測信號，從該第一組頻率決定一個對應該接收單元所接收到的該回應信號具有最大能量的目標頻率；及其中，該處理單元藉由該發射控制信號及該切換控制信號來控制該發射單元及該切換單元，以使得該發射單元產生具有該目標頻率的該激發信號，並使得該切換單元輪流建立該等天線單元中包括該目標天線單元的一部分天線單元與該發射單元及該接收單元間之連接，該處理單元根據來自該接收單元的該偵測信號，更新該目標天線，並得到該位置指示器相對於該位置偵測裝置的位置資訊。 A position detection system comprising: a position indicator capable of transmitting a signal corresponding to an external signal when an external signal is received by the external signal; and a position detecting device comprising a plurality of antenna units, Each of the antenna units includes at least one antenna, the antennas of the antenna units are arranged in the same direction, and a transmitting unit generates an excitation signal according to a transmission control signal, the frequency of the excitation signal is associated with the emission control signal, and a receiving unit a switching unit electrically connected to the antenna unit, the transmitting unit and the receiving unit, and establishing a connection between one of the antenna units and the transmitting unit and the receiving unit according to a switching control signal, so that the transmitting The unit transmits the excitation signal toward the position indicator via the one of the antenna units, and the receiving unit receives a response signal from the position indicator corresponding to the excitation signal via the one of the antenna units The receiving unit detects the received energy of the response signal to generate a detection signal, and a processing unit is electrically connected to the transmitting unit, the receiving unit and the switching unit to generate the transmission control signal. And the switching control signal, and outputting the transmission control signal and the switching control signal to the transmitting unit and the switching unit respectively, the processing unit receiving the detection signal from the receiving unit, and obtaining, according to the detection signal, Position information of the position indicator relative to the position detecting device; wherein the processing unit uses the hair Controlling the signal and the switching control signal to control the transmitting unit and the switching unit, so that the switching unit establishes a connection between a target antenna unit including a target antenna and the transmitting unit and the receiving unit in the antenna unit, and Having the transmitting unit generate the excitation signal whose frequency is converted in the first group of frequencies with time, and the processing unit determines, according to the detection signal from the receiving unit, a corresponding receiving unit from the first group of frequencies The response signal has a target frequency of maximum energy; and wherein the processing unit controls the transmitting unit and the switching unit by the emission control signal and the switching control signal, so that the transmitting unit generates the excitation signal having the target frequency, and causes The switching unit in turn establishes a connection between a part of the antenna units including the target antenna unit and the transmitting unit and the receiving unit, and the processing unit updates the target antenna according to the detection signal from the receiving unit, And obtaining position information of the position indicator relative to the position detecting device.

如請求項5所述的位置偵測系統，其中：該處理單元藉由該發射控制信號及該切換控制信號來控制該發射單元及該切換單元，以使得該切換單元建立該目標天線單元與該發射單元及該接收單元間之連接，並使得該發射單元產生其頻率隨時間在包括該目標頻率之第二組頻率間變換的該激發信號，該處理單元根據來自該接收單元的該偵測信號，得到該位置指示器的操作狀態資訊。 The position detecting system of claim 5, wherein: the processing unit controls the transmitting unit and the switching unit by using the transmitting control signal and the switching control signal, so that the switching unit establishes the target antenna unit and the a connection between the transmitting unit and the receiving unit, and causing the transmitting unit to generate the excitation signal whose frequency changes over time between a second group of frequencies including the target frequency, the processing unit according to the detection signal from the receiving unit Get the operation status information of the position indicator.

如請求項5所述的位置偵測系統，其中：該處理單元藉由該發射控制信號及該切換控制信號來控制該發射單元及該切換單元，以使得該發射單元產生其頻率為該第一組頻率中之一者的該激發信號，並使得該切換單元輪流建立該等天線單元與該發射單元及該接收單元間之連接，該處理單元根據來自該接收單元的該偵測信號，決定該等天線單元的所有天線中最接近該位置指示器的一者作為該目標天線。The position detecting system of claim 5, wherein: the processing unit controls the transmitting unit and the switching unit by the transmitting control signal and the switching control signal, so that the transmitting unit generates the frequency as the first The excitation signal of one of the group frequencies, and causing the switching unit to establish a connection between the antenna unit and the transmitting unit and the receiving unit in turn, the processing unit determining the signal according to the detection signal from the receiving unit The closest of all antennas of the same antenna unit One of the position indicators serves as the target antenna.