TWI663806B - Supplying-end module of induction type power supply system and signal detection method using the same - Google Patents
Supplying-end module of induction type power supply system and signal detection method using the same Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/0701—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips at least one of the integrated circuit chips comprising an arrangement for power management
- G06K19/0715—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips at least one of the integrated circuit chips comprising an arrangement for power management the arrangement including means to regulate power transfer to the integrated circuit
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
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- Microelectronics & Electronic Packaging (AREA)
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Abstract
一種供電模組,用於一感應式電源供應系統,該供電模組包含有一供電線圈、一第一驅動裝置、一第二驅動裝置及一訊號偵測模組。該第一驅動裝置耦接於該供電線圈,用來驅動該供電線圈以發送電力。該第二驅動裝置耦接於該供電線圈,用來控制該供電線圈輸出一偵測訊號。該訊號偵測模組耦接於該供電線圈,用來偵測對應於該偵測訊號之一反射訊號。 A power supply module is used in an inductive power supply system. The power supply module includes a power supply coil, a first drive device, a second drive device, and a signal detection module. The first driving device is coupled to the power supply coil for driving the power supply coil to transmit power. The second driving device is coupled to the power supply coil and is used to control the power supply coil to output a detection signal. The signal detection module is coupled to the power supply coil for detecting a reflection signal corresponding to the detection signal.
Description
本發明係指一種感應式電源供應系統之供電模組及其訊號偵測方法,尤指一種可用於感應式電源供應系統之供電模組的偵測智慧卡之方法。 The invention relates to a power supply module of an inductive power supply system and a signal detection method thereof, and particularly to a method for detecting a smart card that can be used for a power supply module of an inductive power supply system.
在感應式電源供應器中,供電端係透過驅動電路推動供電線圈產生諧振,進而發出射頻電磁波,再透過受電端的線圈接收電磁波能量後進行電性轉換,以產生直流電源提供予受電端裝置。供電線圈所發送的電磁能量若施加在金屬體上,會對其產生加熱效果,累積熱量後可能造成金屬體燃燒而發生危害。在先前技術中,感應式電源供應器已包含可用於偵測金屬物體的技術,能夠有效偵測可能受到電磁能量影響而產生發熱現象的金屬物體,並在發現金屬物體後中斷能量發送以進行保護。 In an inductive power supply, the power supply end drives the power supply coil to resonate through a drive circuit, and then emits radio frequency electromagnetic waves. The electromagnetic power is then converted through the power receiving coil to generate a DC power supply to the power receiving device. If the electromagnetic energy sent by the power supply coil is applied to a metal body, it will have a heating effect, and the accumulated heat may cause the metal body to burn and cause harm. In the prior art, the inductive power supply has included technology that can be used to detect metal objects, which can effectively detect metal objects that may be affected by electromagnetic energy and generate heat, and interrupt the energy transmission for protection when metal objects are found .
日常生活中已大量使用智慧卡,其採用例如近場通訊(Near Field Communication,NFC)、無線射頻識別(Radio Frequency Identification,RFID)或其它相似技術來進行通訊,可捕捉微小電磁能量後啟動內部晶片進行資料反饋傳送,此技術只需要接收微小電磁能量即可啟動,反之,過大的電磁能量被智慧卡接收會損毀內部晶片,而感應式電源供應器可能對此類型的裝置造成相 當大的危害。 Smart cards are widely used in daily life, using Near Field Communication (Near Field Communication) Communication (NFC), Radio Frequency Identification (RFID) or other similar technologies for communication. It can capture the small electromagnetic energy and start the internal chip for data feedback transmission. This technology only needs to receive the small electromagnetic energy to start, and vice versa , The excessive electromagnetic energy received by the smart card will damage the internal chip, and the inductive power supply may cause damage to this type of device. When great harm.
換言之,感應式電源供應器所發送的電磁能量對智慧卡而言過於強大,被智慧卡接收後往往直接燒毀內部晶片。然而,智慧卡能夠接收的電磁能量十分細微,無法被傳統感應式電源供應器之偵測技術識別。現有唯一可靠的方式是在感應式電源供應器之發送線圈上設置對應的讀卡裝置,在發送電力之前先由讀卡裝置判讀有無智慧卡存在。然而,設置額外的讀卡裝置需要額外的成本,且對應多種規格的智慧卡需要多種不同讀卡裝置,除了增加成本外,讀卡線圈也大幅增加裝置的體積。有鑑於此,習知技術實有改進之必要。 In other words, the electromagnetic energy sent by the inductive power supply is too powerful for the smart card, and it is often burned directly after being received by the smart card. However, the electromagnetic energy that smart cards can receive is very subtle and cannot be identified by the detection technology of traditional inductive power supplies. At present, the only reliable method is to set a corresponding card reading device on the transmitting coil of the inductive power supply, and the card reading device determines whether a smart card exists before transmitting power. However, setting up additional card reading devices requires additional costs, and smart cards corresponding to multiple specifications require multiple different card reading devices. In addition to increasing costs, the card reading coil also greatly increases the size of the device. In view of this, it is necessary to improve the conventional technology.
因此,本發明之主要目的即在於提供一種可用於感應式電源供應系統之供電模組的智慧卡偵測方法,其可透過感應式電源供應系統之供電線圈來輸出用於智慧卡之偵測訊號,以實現智慧卡偵測同時改善上述問題。 Therefore, the main object of the present invention is to provide a smart card detection method that can be used in a power supply module of an inductive power supply system, which can output a detection signal for a smart card through a power supply coil of the inductive power supply system To achieve smart card detection and improve the above problems.
本發明揭露一種供電模組,用於一感應式電源供應系統,該供電模組包含有一供電線圈、一第一驅動裝置、一第二驅動裝置及一訊號偵測模組。 該第一驅動裝置耦接於該供電線圈,用來驅動該供電線圈以發送電力。該第二驅動裝置耦接於該供電線圈,用來控制該供電線圈輸出一偵測訊號。該訊號偵測模組耦接於該供電線圈,用來偵測對應於該偵測訊號之一反射訊號。 The invention discloses a power supply module for an inductive power supply system. The power supply module includes a power supply coil, a first driving device, a second driving device, and a signal detection module. The first driving device is coupled to the power supply coil for driving the power supply coil to transmit power. The second driving device is coupled to the power supply coil and is used to control the power supply coil to output a detection signal. The signal detection module is coupled to the power supply coil for detecting a reflection signal corresponding to the detection signal.
本發明另揭露一種訊號偵測方法,用於一感應式電源供應系統之一供電模組,該供電模組包含有一供電線圈。該訊號偵測方法包含有透過一第一驅動裝置停止驅動,以控制該供電線圈暫停輸出電力;於該供電線圈暫停輸出 電力的期間,透過一第二驅動裝置驅動該供電線圈進行諧振;偵測該供電線圈之一線圈訊號,以取得該線圈訊號之一波峰電壓準位;將一參考電壓設定於該波峰電壓準位減去一預設電壓;該第二驅動裝置停止驅動該供電線圈再重新開始驅動該供電線圈達一特定次數,以輸出一偵測訊號;以及於輸出該偵測訊號之後,比較該參考電壓與該線圈訊號,以判斷是否接收到對應於該偵測訊號之一反射訊號。 The present invention also discloses a signal detection method for a power supply module of an inductive power supply system. The power supply module includes a power supply coil. The signal detection method includes stopping driving through a first driving device to control the power supply coil to suspend output of power; and to suspend output at the power supply coil. During the power period, the power supply coil is driven to resonate through a second driving device; a coil signal of the power supply coil is detected to obtain a peak voltage level of the coil signal; a reference voltage is set at the peak voltage level Subtract a preset voltage; the second driving device stops driving the power supply coil and restarts driving the power supply coil a specific number of times to output a detection signal; and after outputting the detection signal, compares the reference voltage with The coil signal is used to determine whether a reflection signal corresponding to the detection signal is received.
100、400、500‧‧‧感應式電源供應系統 100, 400, 500‧‧‧‧ Inductive power supply system
1‧‧‧供電模組 1‧‧‧power supply module
10‧‧‧電源供應器 10‧‧‧ Power Supply
11‧‧‧處理器 11‧‧‧ processor
12‧‧‧時脈產生模組 12‧‧‧ Clock Generation Module
121、421‧‧‧時脈產生器 121, 421‧‧‧ clock generator
13‧‧‧供電驅動裝置 13‧‧‧Power supply drive
43‧‧‧高頻驅動裝置 43‧‧‧high frequency drive
14、141、451、452‧‧‧諧振電容 14,141,451,452‧‧‧Resonant capacitors
15‧‧‧供電線圈 15‧‧‧Power supply coil
16‧‧‧訊號偵測模組 16‧‧‧Signal Detection Module
17‧‧‧比較器 17‧‧‧ Comparator
18‧‧‧數位類比轉換器 18‧‧‧ Digital Analog Converter
160‧‧‧分壓電路 160‧‧‧Divided voltage circuit
161、162‧‧‧分壓電阻 161, 162‧‧‧ divided voltage resistors
19‧‧‧提示裝置 19‧‧‧ reminder device
44‧‧‧開關模組 44‧‧‧Switch Module
441、442、443‧‧‧開關 441, 442, 443‧‧‧ switches
152‧‧‧電感 152‧‧‧Inductance
Vc‧‧‧線圈訊號 Vc‧‧‧coil signal
2‧‧‧受電模組 2‧‧‧ Power receiving module
21‧‧‧負載單元 21‧‧‧load unit
22‧‧‧受電線圈 22‧‧‧ Power receiving coil
3‧‧‧智慧卡 3‧‧‧Smart Card
31‧‧‧線圈 31‧‧‧coil
32‧‧‧積體電路 32‧‧‧Integrated Circuit
20‧‧‧訊號偵測流程 20‧‧‧Signal detection process
200~214‧‧‧步驟 200 ~ 214‧‧‧step
V1‧‧‧波峰電壓準位 V1‧‧‧ peak voltage level
V2‧‧‧參考電壓 V2‧‧‧Reference voltage
Sdet‧‧‧偵測訊號 Sdet ‧‧‧ detection signal
Sref‧‧‧反射訊號 Sref‧‧‧Reflected signal
R1‧‧‧電阻 R1‧‧‧ resistance
第1圖為本發明實施例一感應式電源供應系統之示意圖。 FIG. 1 is a schematic diagram of an inductive power supply system according to an embodiment of the present invention.
第2圖為本發明實施例一訊號偵測流程之示意圖。 FIG. 2 is a schematic diagram of a signal detection process according to an embodiment of the present invention.
第3圖為本發明實施例發送偵測訊號並偵測相對應反射訊號之波形示意圖。 FIG. 3 is a waveform diagram of sending a detection signal and detecting a corresponding reflection signal according to an embodiment of the present invention.
第4圖及第5圖分別為本發明實施例另一感應式電源供應系統之示意圖。 4 and 5 are schematic diagrams of another inductive power supply system according to an embodiment of the present invention.
請參考第1圖,第1圖為本發明實施例一感應式電源供應系統100之示意圖。如第1圖所示,感應式電源供應系統100包含有一供電模組1及一受電模組2。供電模組1可接收來自於一電源供應器10之電源。供電模組1包含有一處理器11、一時脈產生模組12、一供電驅動裝置13、諧振電容14及451、一高頻驅動裝置43、一開關模組44、一供電線圈15、一訊號偵測模組16、一提示裝置19及一分壓電路160。供電線圈15可用來發送電磁能量至受電模組2以進行供電,諧振電容14耦接於供電線圈15,於供電時可用來搭配供電線圈14進行諧振。供電驅動裝置13耦接於諧振電容14及供電線圈15,其可接受處理器11的控制,用來發送驅動訊號以驅動供電線圈15發送電力。供電驅動裝置13可採用全橋或半橋方 式進行驅動,其驅動方式不應為本發明的限制。此外,在供電模組1中,可選擇性地採用磁性材料所構成之磁導體,用來提升供電線圈15之電磁感應能力,同時避免電磁能量影響線圈非感應面方向之物體。 Please refer to FIG. 1. FIG. 1 is a schematic diagram of an inductive power supply system 100 according to an embodiment of the present invention. As shown in FIG. 1, the inductive power supply system 100 includes a power supply module 1 and a power receiving module 2. The power supply module 1 can receive power from a power supply 10. The power supply module 1 includes a processor 11, a clock generation module 12, a power supply driving device 13, resonance capacitors 14 and 451, a high-frequency driving device 43, a switch module 44, a power supply coil 15, and a signal detection device. The test module 16, a prompting device 19 and a voltage dividing circuit 160. The power supply coil 15 can be used to send electromagnetic energy to the power receiving module 2 for power supply. The resonance capacitor 14 is coupled to the power supply coil 15 and can be used to resonate with the power supply coil 14 during power supply. The power supply driving device 13 is coupled to the resonance capacitor 14 and the power supply coil 15. The power supply driving device 13 can be controlled by the processor 11 and is used to send a driving signal to drive the power supply coil 15 to send power. The power supply driving device 13 may adopt a full-bridge or half-bridge method. The driving mode is not limited by the present invention. In addition, in the power supply module 1, a magnetic conductor made of a magnetic material may be selectively used to improve the electromagnetic induction capability of the power supply coil 15 while avoiding electromagnetic energy affecting objects in the direction of the non-inductive surface of the coil.
在本發明實施例中,供電線圈15除了可用來發送電力之外,亦可用來進行智慧卡偵測。詳細來說,高頻驅動裝置43透過諧振電容451耦接於供電線圈15,可用來控制供電線圈15輸出一偵測訊號,此偵測訊號可用來偵測智慧卡的存在。開關模組44包含有一開關441,耦接於高頻驅動裝置43及諧振電容451之間,可用來控制高頻驅動裝置43之運作。當供電線圈15欲輸出電力時,可控制開關441斷開;當供電線圈15欲輸出偵測訊號時,可控制開關441導通,使得高頻驅動裝置43可驅動供電線圈15運作。此外,供電驅動裝置13亦可設置一開關(未繪示),於輸出電力時啟動供電驅動裝置13,並於輸出偵測訊號時關閉供電驅動裝置13並控制供電線圈15未接收高頻驅動裝置43之驅動訊號的一端耦接至接地端。 In the embodiment of the present invention, in addition to being used for transmitting power, the power supply coil 15 can also be used for smart card detection. In detail, the high-frequency driving device 43 is coupled to the power supply coil 15 through the resonance capacitor 451, and can be used to control the power supply coil 15 to output a detection signal. The detection signal can be used to detect the presence of the smart card. The switch module 44 includes a switch 441, which is coupled between the high-frequency driving device 43 and the resonance capacitor 451 and can be used to control the operation of the high-frequency driving device 43. When the power supply coil 15 wants to output power, the control switch 441 can be turned off; when the power supply coil 15 wants to output a detection signal, the control switch 441 can be turned on, so that the high-frequency driving device 43 can drive the power supply coil 15 to operate. In addition, the power supply driving device 13 may also be provided with a switch (not shown), which starts the power supply driving device 13 when outputting power, and turns off the power supply driving device 13 when outputting a detection signal, and controls the power supply coil 15 to not receive the high-frequency driving device. One end of the driving signal of 43 is coupled to the ground terminal.
當供電線圈15輸出偵測訊號之後,訊號偵測模組16可偵測對應於偵測訊號之一反射訊號。在一實施例中,訊號偵測模組16可由一比較器17及一數位類比轉換器(Digital to Analog Converter,DAC)18所構成,可用來追蹤供電線圈15之一線圈訊號Vc的峰值,並據以偵測反射訊號。分壓電路160包含有分壓電阻161及162,其可對供電線圈15上的線圈訊號Vc進行衰減之後,將其輸出至訊號偵測模組16。在部分實施例中,若處理器11及訊號偵測模組16等電路具有足夠的耐壓,亦可不採用分壓電路160,直接由訊號偵測模組16接收供電線圈15上的線圈訊號Vc。 After the power supply coil 15 outputs a detection signal, the signal detection module 16 can detect a reflection signal corresponding to one of the detection signals. In one embodiment, the signal detection module 16 may be composed of a comparator 17 and a digital to analog converter (DAC) 18, which may be used to track the peak value of the coil signal Vc of one of the power supply coils 15 and Based on this, a reflected signal is detected. The voltage dividing circuit 160 includes voltage dividing resistors 161 and 162, which can attenuate the coil signal Vc on the power supply coil 15 and output it to the signal detection module 16. In some embodiments, if the circuits such as the processor 11 and the signal detection module 16 have sufficient withstand voltage, the voltage detection circuit 160 may be used instead, and the signal detection module 16 may directly receive the coil signal on the power supply coil 15 Vc.
此外,處理器11可用來接收訊號偵測模組16之偵測結果,以判斷智慧卡是否存在,進而控制供電驅動裝置13及供電線圈15之運作,如控制是否輸出電力。處理器11可以是任何類型的處理裝置,如一中央處理器(Central Processing Unit,CPU)、一微處理器(Microprocessor)、一微控制器(Microcontroller Unit,MCU)等。時脈產生模組12包含有時脈產生器121及421,分別用來輸出時脈訊號至供電驅動裝置13及高頻驅動裝置43。時脈產生模組12可由脈衝寬度調變產生器(Pulse Width Modulation generator,PWM generator)或其它類型的時脈產生器來實現。提示裝置19可選擇性地設置於供電模組1,其可在處理器11判斷智慧卡存在時,產生一提示訊號通知感應式電源供應系統100之使用者移除智慧卡。提示裝置19可透過任何方式通知使用者,如顯示燈號、蜂鳴器、喇叭、或透過螢幕顯示等。至於其他可能的組成元件或模組,如供電單元、顯示單元等,可視系統需求而增加或減少,故在不影響本實施例之說明下,略而未示。 In addition, the processor 11 can be used to receive the detection result of the signal detection module 16 to determine whether a smart card exists, and then control the operation of the power supply driving device 13 and the power supply coil 15 such as controlling whether to output power. The processor 11 may be any type of processing device, such as a central processing unit (CPU), a microprocessor (microprocessor), a microcontroller (microcontroller unit, MCU), and the like. The clock generation module 12 includes clock generators 121 and 421, which are respectively used to output clock signals to the power supply driving device 13 and the high-frequency driving device 43. The clock generating module 12 may be implemented by a pulse width modulation generator (PWM generator) or other types of clock generators. The prompting device 19 may be selectively disposed on the power supply module 1, and when the processor 11 determines that the smart card exists, a prompt signal is generated to notify the user of the inductive power supply system 100 to remove the smart card. The prompting device 19 can notify the user in any manner, such as displaying a light, a buzzer, a speaker, or displaying on a screen. As for other possible constituent elements or modules, such as a power supply unit, a display unit, etc., they may be increased or decreased according to the system requirements, so they are not shown without affecting the description of this embodiment.
請繼續參考第1圖。受電模組2包含有一負載單元21及一受電線圈22。受電線圈22可用來接收供電線圈15之供電。負載單元21則泛指各種受電線圈22之內部元件或模組,如穩壓電路、諧振電容、整流電路、訊號反饋電路、受電端處理器等,上述元件或模組可視系統需求而增加或減少,且不應為本發明的限制。此外,一智慧卡3未包含於感應式電源供應系統100但繪示於第1圖中,智慧卡3可以是例如符合近場通訊(Near Field Communication,NFC)規格之智慧卡,其包含一線圈31及一積體電路(Integrated Circuit,IC)32。 Please continue to refer to Figure 1. The power receiving module 2 includes a load unit 21 and a power receiving coil 22. The power receiving coil 22 can be used to receive power from the power supply coil 15. The load unit 21 generally refers to various internal components or modules of the power receiving coil 22, such as voltage stabilization circuits, resonant capacitors, rectifier circuits, signal feedback circuits, power receiving end processors, etc. The above components or modules can be increased or decreased according to the needs of the system , And should not be a limitation of the present invention. In addition, a smart card 3 is not included in the inductive power supply system 100 but is shown in FIG. 1. The smart card 3 may be, for example, a smart card conforming to Near Field Communication (NFC) specifications, which includes a coil. 31 and an integrated circuit (IC) 32.
請參考第2圖,第2圖為本發明實施例一訊號偵測流程20之示意圖。 訊號偵測流程20可用於一感應式電源供應系統之供電模組(如第1圖之感應式電源供應系統100之供電模組1),其包含以下步驟: 步驟200:開始。 Please refer to FIG. 2. FIG. 2 is a schematic diagram of a signal detection process 20 according to an embodiment of the present invention. The signal detection process 20 can be used for a power supply module of an inductive power supply system (such as the power supply module 1 of the inductive power supply system 100 in FIG. 1), which includes the following steps: Step 200: Start.
步驟202:透過供電驅動裝置13停止驅動,以控制供電線圈15暫停輸出電力。 Step 202: Stop driving through the power supply driving device 13 to control the power supply coil 15 to suspend output of power.
步驟203:接合開關441。 Step 203: Engage the switch 441.
步驟204:於供電線圈15暫停輸出電力的期間,透過高頻驅動裝置43驅動供電線圈15進行諧振。 Step 204: During the period when the power supply coil 15 suspends outputting power, the high-frequency driving device 43 drives the power supply coil 15 to resonate.
步驟206:偵測供電線圈15之線圈訊號Vc,以取得線圈訊號Vc之一波峰電壓準位V1。 Step 206: Detect the coil signal Vc of the power supply coil 15 to obtain a peak voltage level V1 of the coil signal Vc.
步驟208:將一參考電壓V2設定於波峰電壓準位V1減去一預設電壓。 Step 208: Set a reference voltage V2 to the peak voltage level V1 minus a preset voltage.
步驟210:高頻驅動裝置43停止驅動供電線圈15再重新開始驅動供電線圈15達一特定次數,以輸出一偵測訊號Sdet。 Step 210: The high-frequency driving device 43 stops driving the power supply coil 15 and restarts driving the power supply coil 15 a specific number of times to output a detection signal Sdet.
步驟212:於輸出偵測訊號Sdet之後,比較參考電壓V2與線圈訊號Vc,以判斷是否接收到對應於偵測訊號Sdet之一反射訊號Sref。 Step 212: After outputting the detection signal Sdet, compare the reference voltage V2 with the coil signal Vc to determine whether a reflection signal Sref corresponding to one of the detection signals Sdet is received.
步驟213:切斷開關441。 Step 213: Turn off the switch 441.
步驟214:結束。 Step 214: End.
根據訊號偵測流程20,偵測訊號Sdet的發送可在供電線圈15暫停輸出電力的期間進行。由於電力發送與偵測訊號輸出皆採用相同的供電線圈15,因此,電力發送與偵測訊號輸出的運作需分時進行。在此例中,供電驅動裝置13可停止驅動,以控制供電線圈15暫停輸出電力,並由高頻驅動裝置43驅動供電線圈15進行諧振。一般來說,供電線圈15輸出的能量取決於驅動裝置輸出之驅動訊號振幅、諧振電容的電容值、供電線圈15的電感值和操作頻率等因素。當供電驅動裝置13驅動供電線圈15輸出電力時,其輸出能量較大,因此,供電驅 動裝置13需輸出較大的訊號振幅,同時使用電容值較大的諧振電容14,使得供電線圈15操作在較低頻率。當高頻驅動裝置43驅動供電線圈15進行諧振時,在採用相同供電線圈15(具有相同電感值)的情況下,其諧振電容451的電容值較小(通常遠小於諧振電容14),使得供電線圈15操作在較高頻率同時具有較低且可被智慧卡接收的輸出訊號振幅。在一實施例中,亦可減少高頻驅動裝置43的驅動能力,或在高頻驅動裝置43與供電線圈15之間設置電阻,以降低高頻驅動裝置43驅動供電線圈15的輸出訊號振幅。 According to the signal detection process 20, the detection signal Sdet may be transmitted during the period when the power supply coil 15 suspends outputting power. Since the same power supply coil 15 is used for power transmission and detection signal output, the operation of power transmission and detection signal output needs to be performed in a time-sharing manner. In this example, the power supply driving device 13 may stop driving to control the power supply coil 15 to suspend output of power, and the high frequency driving device 43 drives the power supply coil 15 to resonate. Generally, the energy output by the power supply coil 15 depends on factors such as the amplitude of the driving signal output by the driving device, the capacitance value of the resonance capacitor, the inductance value of the power supply coil 15 and the operating frequency. When the power supply driving device 13 drives the power supply coil 15 to output power, its output energy is large. The moving device 13 needs to output a larger signal amplitude, and at the same time uses a resonant capacitor 14 with a larger capacitance value, so that the power supply coil 15 operates at a lower frequency. When the high-frequency driving device 43 drives the power supply coil 15 to resonate, in the case of using the same power supply coil 15 (having the same inductance value), the capacitance value of its resonance capacitor 451 is small (usually much smaller than the resonance capacitor 14), making power The coil 15 operates at a higher frequency while having a lower output signal amplitude that can be received by the smart card. In an embodiment, the driving capability of the high-frequency driving device 43 may be reduced, or a resistor may be provided between the high-frequency driving device 43 and the power supply coil 15 to reduce the output signal amplitude of the high-frequency driving device 43 driving the power supply coil 15.
根據一般短距離通訊介面(如近場通訊(Near Field Communication,NFC))的規格,其通訊裝置區分為主機端和從屬端,主機端可以是例如讀卡機,從屬端可以是例如智慧卡。從屬端通常採用無電源的機制,即待機時無須接收電力。主機端可間歇性發送訊號,此訊號帶有電磁能量且具有特定頻率,當從屬端靠近主機端時,若接收到的訊號符合其可辨識的頻率時,可藉由接收到的訊號能量來啟動運作。當從屬端啟動之後,可透過負載調制技術,在線圈載波上反射訊號/資料。換言之,主機端裝置可透過輪詢(polling)的方式傳送訊號,當從屬端接收到輪詢訊號之後,可在特定時間點上反饋識別碼至主機端。在從屬端未接收到輪詢訊號的情況下,不會執行任何動作。 According to the specifications of a general short-range communication interface (such as Near Field Communication (NFC)), the communication device is divided into a master end and a slave end. The master end may be, for example, a card reader, and the slave end may be, for example, a smart card. The slave usually adopts a powerless mechanism, that is, it does not need to receive power when it is in standby. The host can send signals intermittently. This signal has electromagnetic energy and has a specific frequency. When the slave is close to the host, if the received signal meets its identifiable frequency, it can be activated by the received signal energy. Operation. After the slave is activated, the signal / data can be reflected on the coil carrier through load modulation technology. In other words, the host device can send a signal by polling, and after the slave terminal receives the polling signal, it can feedback the identification code to the host at a specific point in time. If the slave does not receive the polling signal, no action is performed.
在一實施例中,為了偵測近場通訊規格的智慧卡,使供電線圈15能夠輸出對應於近場通訊規格的偵測訊號,高頻驅動裝置43需驅動供電線圈15操作在13.56MHz的頻率。相較之下,當供電驅動裝置13驅動供電線圈15以輸出電力時,其操作頻率大約為100kHz。在此情形下,諧振電容14的電容值應大於諧振電容451的電容值,以控制供電線圈15操作在適合的頻率。 In an embodiment, in order to detect a near field communication standard smart card so that the power supply coil 15 can output a detection signal corresponding to the near field communication standard, the high-frequency driving device 43 needs to drive the power supply coil 15 to operate at a frequency of 13.56 MHz. . In comparison, when the power supply driving device 13 drives the power supply coil 15 to output power, its operating frequency is approximately 100 kHz. In this case, the capacitance of the resonance capacitor 14 should be greater than the capacitance of the resonance capacitor 451 to control the power supply coil 15 to operate at a suitable frequency.
在此例中,高頻驅動裝置43驅動供電線圈15輸出偵測訊號的步驟可在供電驅動裝置13控制供電線圈15暫停輸出電力的期間進行。在另一實施例中,輸出偵測訊號的步驟亦可在供電線圈15開始輸出電力之前進行,以在輸出電力之前先判斷智慧卡是否存在。 In this example, the step of the high-frequency driving device 43 driving the power supply coil 15 to output the detection signal may be performed while the power supply driving device 13 controls the power supply coil 15 to suspend the output of power. In another embodiment, the step of outputting the detection signal may be performed before the power supply coil 15 starts to output power, so as to determine whether a smart card exists before outputting power.
接著,供電線圈15可發送類似於輪詢訊號的偵測訊號。請參考第3圖,第3圖為本發明實施例發送偵測訊號Sdet並偵測相對應反射訊號Sref之波形示意圖。第3圖繪示供電線圈15之線圈訊號Vc(即供電線圈15與諧振電容14之間的電壓訊號)的波形。高頻驅動裝置43的驅動使得供電線圈15上的線圈訊號Vc發生振盪。接著,高頻驅動裝置43可間歇性停止驅動供電線圈15數次,亦即,停止驅動供電線圈15並重新開始驅動供電線圈15達一特定次數,以控制供電線圈15輸出偵測訊號Sdet。此特定次數為智慧卡相關規格所規範的次數,但不應以此為限。此時,若一智慧卡3存在供電線圈15附近時,智慧卡3之線圈31可偵測到偵測訊號Sdet,並在一段預定時間之後回傳反射訊號Sref,反射訊號Sref會在線圈訊號Vc之振幅上產生調制,使得線圈訊號Vc上出現振幅下降的區段,如第3圖所示。 Then, the power supply coil 15 can send a detection signal similar to the polling signal. Please refer to FIG. 3. FIG. 3 is a waveform diagram of a detection signal Sdet and a corresponding reflection signal Sref according to an embodiment of the present invention. FIG. 3 shows the waveform of the coil signal Vc of the power supply coil 15 (that is, the voltage signal between the power supply coil 15 and the resonance capacitor 14). The driving of the high-frequency driving device 43 causes the coil signal Vc on the power supply coil 15 to oscillate. Then, the high-frequency driving device 43 may intermittently stop driving the power supply coil 15 several times, that is, stop driving the power supply coil 15 and restart driving the power supply coil 15 for a specific number of times to control the power supply coil 15 to output a detection signal Sdet. This specific number of times is specified by the smart card related specifications, but should not be limited to this number. At this time, if a smart card 3 exists near the power supply coil 15, the coil 31 of the smart card 3 can detect the detection signal Sdet and return a reflected signal Sref after a predetermined time, and the reflected signal Sref will be at the coil signal Vc Modulation is generated on the amplitude, so that the amplitude decrease section appears on the coil signal Vc, as shown in FIG. 3.
為了偵測線圈訊號Vc上的振幅變化以對反射訊號Sref進行判斷,在接收反射訊號Sref之前,訊號偵測模組16可先取得並追蹤線圈訊號Vc之波峰電壓準位V1,關於波峰電壓準位V1的追蹤方式記載於中華民國專利號I577108,於此不贅述。接著,處理器11可將參考電壓V2設定於波峰電壓準位V1減去一預設電壓的準位,此預設電壓可依據智慧卡的規格及其反射訊號Sref的型態來決定。在一實施例中,若智慧卡符合近場通訊規格時,其採用10%振幅調制的方式來反饋反射訊號Sref,亦即,反射訊號Sref在線圈訊號Vc上降低峰值電壓的幅度大約為 振幅的10%。在此情形下,可設定預設電壓的大小接近但不超過高頻驅動裝置43驅動供電線圈15進行諧振時的振幅的十分之一,即控制參考電壓V2的高度略高於諧振振幅的90%,如第3圖所示。在此情形下,處理器11可控制數位類比轉換器18輸出參考電壓V2至比較器17之一輸入端,比較器17之另一輸入端則接收線圈訊號Vc,以對線圈訊號Vc和參考電壓V2進行比較,進而判斷是否接收到反射訊號Sref。 In order to detect the change in the amplitude of the coil signal Vc to determine the reflected signal Sref, the signal detection module 16 can obtain and track the peak voltage level V1 of the coil signal Vc before receiving the reflected signal Sref. The tracking method of bit V1 is recorded in the Republic of China Patent No. I577108, and will not be repeated here. Then, the processor 11 may set the reference voltage V2 to the peak voltage level V1 minus a preset voltage level, and the preset voltage may be determined according to the specifications of the smart card and the type of the reflection signal Sref. In an embodiment, if the smart card complies with the near field communication specifications, it uses a 10% amplitude modulation method to feed back the reflected signal Sref, that is, the amplitude of the reflected signal Sref reducing the peak voltage on the coil signal Vc is approximately 10% of the amplitude. In this case, the magnitude of the preset voltage can be set close to but not more than one tenth of the amplitude when the high-frequency driving device 43 drives the power supply coil 15 to resonate, that is, the height of the control reference voltage V2 is slightly higher than 90% of the resonance amplitude. %, As shown in Figure 3. In this case, the processor 11 can control the digital analog converter 18 to output the reference voltage V2 to one input terminal of the comparator 17, and the other input terminal of the comparator 17 receives the coil signal Vc to control the coil signal Vc and the reference voltage. V2 performs a comparison to determine whether a reflection signal Sref is received.
由上述可知,本發明之訊號偵測模組可和中華民國專利號I577108中用來偵測金屬異物的比較器模組採用相同結構,換言之,相同電路結構可用於金屬異物偵測以及智慧卡偵測,可減少額外的電路成本。 It can be known from the above that the signal detection module of the present invention can adopt the same structure as the comparator module for detecting metal foreign objects in the Republic of China Patent No. I577108. In other words, the same circuit structure can be used for metal foreign object detection and smart card detection. Testing can reduce additional circuit costs.
進一步地,當反射訊號Sref出現時,訊號偵測模組16之比較器17可偵測到線圈訊號Vc上出現低於參考電壓V2的峰值電壓,即可判斷接收到反射訊號Sref並將相關資訊傳送給處理器11。處理器11進而判斷供電線圈15之電源供應範圍內存在智慧卡3。需注意的是,依照近場通訊規格,智慧卡3需在接收到偵測訊號Sdet之後86微秒(microsecond,μs)回應反射訊號Sref,因此,參考電壓V2的設定可在輸出偵測訊號Sdet之後86微秒之內完成,以進行反射訊號Sref的偵測。 Further, when the reflected signal Sref appears, the comparator 17 of the signal detection module 16 can detect that a peak voltage lower than the reference voltage V2 appears on the coil signal Vc, and can determine that the reflected signal Sref is received and related information is received. Transfer to processor 11. The processor 11 further determines that the smart card 3 exists in the power supply range of the power supply coil 15. It should be noted that according to the near field communication specifications, the smart card 3 needs to respond to the reflected signal Sref 86 microseconds (μs) after receiving the detection signal Sdet. Therefore, the reference voltage V2 can be set to output the detection signal Sdet It is then completed within 86 microseconds to detect the reflected signal Sref.
在此情形下,若智慧卡的偵測是在供電線圈15暫停輸出電力的期間進行,當偵測到智慧卡3時,處理器11可控制供電線圈15完全停止發送電力。若智慧卡的偵測是在供電線圈15尚未開始輸出電力之前進行,當偵測到智慧卡3時,處理器11可控制供電線圈15不開始發送電力。在一實施例中,處理器11可控制提示裝置19產生一提示訊號提供予感應式電源供應系統100之使用者,以通 知使用者移除智慧卡,接著供電模組1重新執行上述偵測智慧卡3是否存在的步驟,直到判斷智慧卡3被移除之後再開始發送電力。 In this case, if the detection of the smart card is performed while the power supply coil 15 suspends outputting power, when the smart card 3 is detected, the processor 11 may control the power supply coil 15 to stop transmitting power completely. If the detection of the smart card is performed before the power supply coil 15 has started to output power, when the smart card 3 is detected, the processor 11 may control the power supply coil 15 not to start transmitting power. In an embodiment, the processor 11 may control the prompting device 19 to generate a prompting signal to a user of the inductive power supply system 100 to communicate with Know that the user has removed the smart card, and then the power supply module 1 re-performs the above steps of detecting whether the smart card 3 exists, and then starts to transmit power after determining that the smart card 3 is removed.
此外,若在一段偵測期間內未偵測到反射訊號Sref,代表供電線圈15之電源供應範圍內不存在智慧卡3。在此情形下,處理器11可透過供電驅動裝置13控制供電線圈15繼續發送電力,並可在輸出電力一段時間之後再次暫停供電以執行偵測智慧卡3是否存在的步驟。或者,在確認智慧卡不存在之後,供電模組1可在發送電力之前進一步執行其它偵測,如金屬異物偵測等。 In addition, if the reflected signal Sref is not detected within a period of detection, it means that there is no smart card 3 in the power supply range of the power supply coil 15. In this case, the processor 11 may control the power supply coil 15 to continue to transmit power through the power supply driving device 13, and may temporarily suspend power supply after outputting power for a period of time to perform the step of detecting whether the smart card 3 exists. Alternatively, after confirming that the smart card does not exist, the power supply module 1 may further perform other detections, such as metal foreign object detection, before transmitting power.
值得注意的是,本發明之目的在於透過感應式電源供應器之線圈來偵測智慧卡是否存在線圈附近或線圈之供電範圍內,以避免智慧卡因線圈輸出之電磁能量而燒毀。因此,以第1圖之供電模組1為例,當處理器11判斷接收到反射訊號Sref時,即可控制供電線圈15停止電力輸出,而不需對反射訊號Sref進行後續解碼。換言之,不同於傳統讀卡機在接收到智慧卡反饋的資料之後須進行解碼以取得智慧卡的詳細資訊,本發明只需要判斷智慧卡是否存在即可,而無須取得智慧卡的編號、內容或其它相關資訊。 It is worth noting that the purpose of the present invention is to detect whether the smart card exists near the coil or within the power supply range of the coil through the coil of the inductive power supply, so as to prevent the smart card from being burned by the electromagnetic energy output by the coil. Therefore, taking the power supply module 1 in FIG. 1 as an example, when the processor 11 determines that the reflected signal Sref is received, it can control the power supply coil 15 to stop the power output without performing subsequent decoding of the reflected signal Sref. In other words, unlike traditional card readers, which need to decode the smart card to receive detailed information after receiving the data from the smart card, the present invention only needs to determine whether the smart card exists, without the need to obtain the smart card number, content, or Other relevant information.
此外,本發明之供電模組及訊號偵測方法不僅可用於符合近場通訊規格之智慧卡偵測,亦可用於其它類型的智慧卡。請參考第4圖,第4圖為本發明實施例另一感應式電源供應系統400之示意圖。感應式電源供應系統400之結構類似於感應式電源供應系統100,故功能相同之訊號或元件皆以相同符號表示。感應式電源供應系統400與感應式電源供應系統100之主要差異在於,感應式電源供應系統400之供電模組1另包含一諧振電容452,耦接於供電線圈15及高頻驅動裝置43之間,並透過開關模組44中的另一開關442來進行控制。此外,在 感應式電源供應系統400中,供電模組1採用C-L-C之線圈結構,即供電線圈15之一端耦接於諧振電容14,另一端耦接於另一諧振電容141,使得供電驅動裝置13可通過二個諧振電容進行驅動。另外,在感應式電源供應系統400中之供電模組1中,開關模組44另包含一開關443,耦接於供電線圈15之一端與接地端之間。在此例中,開關441、442及443皆包含於開關模組44中,其可由一晶片來實現。但在其它實施例中,每一開關亦可獨立設置。此外,高頻驅動裝置43之輸出端設置一電阻R1,用來降低高頻驅動裝置43驅動供電線圈15之輸出功率。 In addition, the power supply module and signal detection method of the present invention can be used not only for smart card detection that conforms to near field communication specifications, but also for other types of smart cards. Please refer to FIG. 4, which is a schematic diagram of another inductive power supply system 400 according to an embodiment of the present invention. The structure of the inductive power supply system 400 is similar to that of the inductive power supply system 100, so signals or components having the same function are represented by the same symbols. The main difference between the inductive power supply system 400 and the inductive power supply system 100 is that the power supply module 1 of the inductive power supply system 400 further includes a resonance capacitor 452, which is coupled between the power supply coil 15 and the high-frequency driving device 43. , And is controlled by another switch 442 in the switch module 44. In addition, in In the inductive power supply system 400, the power supply module 1 adopts a CLC coil structure, that is, one end of the power supply coil 15 is coupled to the resonance capacitor 14 and the other end is coupled to the other resonance capacitor 141, so that the power supply driving device 13 can be A resonant capacitor is driven. In addition, in the power supply module 1 in the inductive power supply system 400, the switch module 44 further includes a switch 443, which is coupled between one end of the power supply coil 15 and the ground terminal. In this example, the switches 441, 442, and 443 are all included in the switch module 44, which can be implemented by a chip. However, in other embodiments, each switch can be set independently. In addition, a resistor R1 is provided at the output end of the high-frequency driving device 43 to reduce the output power of the high-frequency driving device 43 driving the power supply coil 15.
在感應式電源供應系統400之供電模組1中,高頻驅動裝置43分別透過諧振電容451及452耦接至供電線圈15,而開關模組44可選擇導通開關441或442,以通過諧振電容451或452進行諧振。較佳地,諧振電容451及452具有不同電容值,使得高頻驅動裝置43透過不同諧振電容451及452可在線圈訊號Vc上產生不同頻率的諧振,以在不同頻段上進行智慧卡偵測,可用於不同類型或具有不同規格的智慧卡。在一實施例中,開關模組44中的開關441或442可同時導通,使得諧振電容451與452並聯而形成另一電容值,進而產生另一不同的諧振頻率。除此之外,高頻驅動裝置43及供電線圈15之間亦可設置多於二個電容,開關模組44可控制高頻驅動裝置43透過其中任一或多個電容耦接至供電線圈15,以在線圈訊號Vc上實現更多種不同頻率的諧振。關於電容的數量及設置方式及其對應的諧振頻率可依各種智慧卡規格與偵測需求來決定,其不應為本發明的限制。 In the power supply module 1 of the inductive power supply system 400, the high-frequency driving device 43 is coupled to the power supply coil 15 through resonance capacitors 451 and 452, respectively, and the switch module 44 can choose to turn on the switch 441 or 442 to pass the resonance capacitor 451 or 452 resonate. Preferably, the resonance capacitors 451 and 452 have different capacitance values, so that the high-frequency driving device 43 can generate resonances of different frequencies on the coil signal Vc through the different resonance capacitors 451 and 452 to perform smart card detection in different frequency bands. Can be used for different types or smart cards with different specifications. In one embodiment, the switches 441 or 442 in the switch module 44 can be turned on at the same time, so that the resonant capacitors 451 and 452 are connected in parallel to form another capacitance value, thereby generating another different resonant frequency. In addition, more than two capacitors may be provided between the high-frequency driving device 43 and the power supply coil 15. The switch module 44 may control the high-frequency driving device 43 to be coupled to the power supply coil 15 through any one or more capacitors. In order to achieve more different kinds of resonance on the coil signal Vc. The number and setting method of the capacitors and their corresponding resonance frequencies can be determined according to various smart card specifications and detection requirements, which should not be a limitation of the present invention.
在另一實施例中,除了高頻驅動裝置43以外,亦可在供電模組1中設置額外一或多個可輸出不同偵測訊號的高頻驅動裝置,此等高頻驅動裝置可在線圈訊號Vc上產生不同的諧振頻率,用來偵測不同類型或具有不同規格的智慧 卡。 In another embodiment, in addition to the high-frequency driving device 43, an additional one or more high-frequency driving devices capable of outputting different detection signals may be provided in the power supply module 1. Different resonance frequencies are generated on the signal Vc, which are used to detect different types of intelligence with different specifications card.
請繼續參考第4圖。在感應式電源供應系統400之供電模組1中,在供電線圈15輸出電力期間,可斷開所有用於高頻驅動裝置43之開關441及442,以避免供電驅動裝置13所輸出之較強驅動訊號傳送至高頻驅動裝置43而造成高頻驅動裝置43損毀。在進行智慧卡偵測期間,除了開啟用於高頻驅動裝置43之開關441及/或442以外,另可控制開關443導通,使得供電線圈15另一端耦接至接地端以作為諧振參考點。同樣地,在第1圖之供電模組1中,供電驅動裝置13亦存在可連接至接地端的開關,其可在進行智慧卡偵測期間導通。 Please continue to refer to Figure 4. In the power supply module 1 of the inductive power supply system 400, during the power output of the power supply coil 15, all the switches 441 and 442 for the high-frequency drive device 43 can be turned off to avoid the strong output of the power supply drive device 13. The driving signal is transmitted to the high-frequency driving device 43 and the high-frequency driving device 43 is damaged. During the smart card detection, in addition to turning on the switches 441 and / or 442 for the high-frequency driving device 43, the switch 443 can be controlled to be turned on, so that the other end of the power supply coil 15 is coupled to the ground terminal as a resonance reference point. Similarly, in the power supply module 1 in FIG. 1, the power supply driving device 13 also has a switch that can be connected to the ground terminal, which can be turned on during the smart card detection.
此外,用來和高頻驅動裝置43進行諧振的電容亦可透過其它方式進行設置。舉例來說,請參考第5圖,第5圖為本發明實施例另一感應式電源供應系統500之示意圖。感應式電源供應系統500之結構類似於感應式電源供應系統100,故功能相同之訊號或元件皆以相同符號表示。感應式電源供應系統500與感應式電源供應系統100之主要差異在於,感應式電源供應系統500之供電模組1另包含一諧振電容141,耦接於供電線圈15與供電驅動裝置13之間,諧振電容141和供電線圈15及諧振電容14形成C-L-C之線圈結構。此外,在感應式電源供應系統500之供電模組1中,用於和高頻驅動裝置43進行諧振的諧振電容451與供電線圈15以並聯方式相連,而高頻驅動裝置43及供電線圈15之間另加入一電感152(可採用較小的線圈來實現)。 In addition, the capacitor used to resonate with the high-frequency driving device 43 may be set in other ways. For example, please refer to FIG. 5, which is a schematic diagram of another inductive power supply system 500 according to an embodiment of the present invention. The structure of the inductive power supply system 500 is similar to that of the inductive power supply system 100, so signals or components having the same function are represented by the same symbols. The main difference between the inductive power supply system 500 and the inductive power supply system 100 is that the power supply module 1 of the inductive power supply system 500 further includes a resonance capacitor 141, which is coupled between the power supply coil 15 and the power supply driving device 13, The resonance capacitor 141, the power supply coil 15 and the resonance capacitor 14 form a coil structure of the CLC. In addition, in the power supply module 1 of the inductive power supply system 500, a resonance capacitor 451 for resonating with the high-frequency drive device 43 is connected in parallel with the power supply coil 15, and the high-frequency drive device 43 and the power supply coil 15 are connected in parallel. Another inductor 152 is added in between (can be realized with a smaller coil).
在感應式電源供應系統500之供電模組1中,諧振電容14及141以及供電線圈15構成較低頻率的諧振電路,於供電驅動裝置13驅動時產生諧振。諧振電容451與供電線圈15和電感152相連構成頻率較高的諧振迴路,可在偵測智慧 卡期間,藉由高頻驅動裝置43的驅動而產生高頻諧振訊號。由於諧振電容451的數值遠小於諧振電容14及141,當供電驅動裝置13推動諧振電容141、供電線圈15及諧振電容14之C-L-C結構以輸出功率時,其頻率遠低於諧振電容451構成的諧振迴路,因此,可忽略諧振電容451的影響。 In the power supply module 1 of the inductive power supply system 500, the resonance capacitors 14 and 141 and the power supply coil 15 constitute a lower-frequency resonance circuit, and resonance occurs when the power supply driving device 13 is driven. The resonance capacitor 451 is connected to the power supply coil 15 and the inductor 152 to form a high-frequency resonance circuit, which can detect intelligence During the card period, a high-frequency resonance signal is generated by the driving of the high-frequency driving device 43. Since the value of the resonance capacitor 451 is much smaller than the resonance capacitors 14 and 141, when the power supply driving device 13 pushes the CLC structure of the resonance capacitor 141, the power supply coil 15 and the resonance capacitor 14 to output power, its frequency is much lower than the resonance formed by the resonance capacitor 451. Therefore, the influence of the resonance capacitor 451 can be ignored.
綜上所述,本發明提供了一種可用於感應式電源供應器之訊號偵測方法,用來偵測感應式電源供應器之線圈供電範圍內是否存在智慧卡,以避免感應式電源供應器之供電線圈輸出過大能量造成智慧卡燒毀。在本發明之實施例中,電力輸出及智慧卡偵測可透過同一線圈實現並以分時方式進行。關於智慧卡之訊號偵測可在供電線圈暫停輸出電力的期間進行,當處理器偵測到反射訊號並判斷智慧卡存在時,可控制供電線圈停止發送電力或不開始發送電力,而處理器只需判斷智慧卡是否存在,而無需對反射訊號進行解碼以取得智慧卡之其它資訊。此外,在本發明之實施例中,感應式電源供應系統之供電線圈可實現發送電力以及偵測智慧卡之功能,因而不需額外設置讀卡機,可節省讀卡機設置所需成本,同時,使用者可設置不同數量且具有不同數值的電容,及/或採用多個對應於不同諧振頻率的高頻驅動電路,以在不同頻段上進行偵測,使得本發明可應用於多種不同類型的智慧卡偵測。 In summary, the present invention provides a signal detection method that can be used in an inductive power supply to detect whether a smart card exists in the coil power supply range of the inductive power supply to avoid the inductive power supply. Excessive energy output from the power supply coil caused the smart card to burn out. In the embodiment of the present invention, power output and smart card detection can be realized through the same coil and performed in a time-sharing manner. Signal detection on smart cards can be performed while the power supply coil is suspending power output. When the processor detects a reflected signal and determines that the smart card is present, it can control the power supply coil to stop sending power or not start sending power. The processor only It is necessary to determine whether a smart card exists, and it is not necessary to decode the reflected signal to obtain other information of the smart card. In addition, in the embodiment of the present invention, the power supply coil of the inductive power supply system can realize the functions of transmitting power and detecting the smart card, so there is no need to set up a card reader, which can save the cost of card reader setup, and , Users can set different numbers of capacitors with different values, and / or use multiple high-frequency drive circuits corresponding to different resonance frequencies to detect at different frequency bands, so that the invention can be applied to many different types of Smart card detection.
以上所述僅為本發明之較佳實施例,凡依本發明申請專利範圍所做之均等變化與修飾,皆應屬本發明之涵蓋範圍。 The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the scope of patent application of the present invention shall fall within the scope of the present invention.
Claims (20)
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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TW107105016A TWI663806B (en) | 2018-02-12 | 2018-02-12 | Supplying-end module of induction type power supply system and signal detection method using the same |
CN201810223784.2A CN108565976B (en) | 2018-02-12 | 2018-03-19 | Power supply module of induction type power supply system and signal detection method thereof |
US16/028,397 US10951063B2 (en) | 2011-02-01 | 2018-07-05 | Supplying-end module of induction type power supply system and signal detection method thereof |
US16/124,211 US10615645B2 (en) | 2011-02-01 | 2018-09-07 | Power supply device of induction type power supply system and NFC device identification method of the same |
US16/132,464 US10630113B2 (en) | 2011-02-01 | 2018-09-16 | Power supply device of induction type power supply system and RF magnetic card identification method of the same |
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Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102054057A (en) * | 2009-11-09 | 2011-05-11 | 上海华虹Nec电子有限公司 | Analog simulation method for RFID tag circuit |
US20110241436A1 (en) * | 2010-04-02 | 2011-10-06 | Advantest Corporation | Wireless power receiving apparatus and wireless power supply system |
CN202404630U (en) * | 2011-12-15 | 2012-08-29 | 中国银联股份有限公司 | Receiving terminal component for near field communication and receiving equipment comprising same |
US20150263531A1 (en) * | 2012-09-14 | 2015-09-17 | Sony Corporation | Non-contact electric power feeding system, terminal device, non-contact electric power feeding device, and non-contact electric power feeding method |
TWI577108B (en) * | 2016-05-13 | 2017-04-01 | 富達通科技股份有限公司 | Induction type power supply system and intruding metal detection method thereof |
CN106571692A (en) * | 2015-10-09 | 2017-04-19 | 纽艾吉科技有限公司 | Wireless electric power receiving device and demodulation method therefor |
JP6122402B2 (en) * | 2014-08-05 | 2017-04-26 | パナソニック株式会社 | Power transmission device and wireless power transmission system |
TWI596546B (en) * | 2013-06-28 | 2017-08-21 | 微科電子有限公司 | Rfid card learning apparatus, wearable produc and operating method thereof |
TWI604678B (en) * | 2016-09-07 | 2017-11-01 | 國立暨南國際大學 | Radio transmission system |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9479225B2 (en) * | 2010-05-13 | 2016-10-25 | Qualcomm Incorporated | Resonance detection and control within a wireless power system |
CN102315692B (en) * | 2010-06-29 | 2013-09-18 | 富达通科技股份有限公司 | Power supply transmission method of high-power wireless induction type power supplier |
TWI481144B (en) * | 2014-01-08 | 2015-04-11 | Fu Da Tong Technology Co Ltd | Method of sensing current signal for supplying-end module of induction type power supply system |
TWI565180B (en) * | 2016-04-14 | 2017-01-01 | 富達通科技股份有限公司 | Signal analysis method and circuit |
TWI570427B (en) * | 2015-10-28 | 2017-02-11 | 富達通科技股份有限公司 | Induction type power supply system and intruding metal detection method thereof |
DE102011016027A1 (en) * | 2011-04-04 | 2012-10-04 | Markus Rehm | Large signal VCO |
KR101350312B1 (en) * | 2012-12-27 | 2014-01-16 | 전자부품연구원 | Reconfigurable antenna apparatus for wireless power transfer of low frequency and near-field communication |
CN107257167B (en) * | 2014-05-27 | 2020-01-21 | 松下知识产权经营株式会社 | Power transmission device and wireless power transmission system |
KR101631669B1 (en) * | 2014-08-06 | 2016-06-17 | 주식회사 맵스 | Magnetic resonance wireless power transmitting apparatus for tuning resonance frequency |
US20160322853A1 (en) * | 2015-04-28 | 2016-11-03 | Intel Corporation | System and method for safe wireless charging station |
CN106786842A (en) * | 2016-11-24 | 2017-05-31 | 北京小米移动软件有限公司 | Charge prompting method and device |
TWI612749B (en) * | 2017-05-22 | 2018-01-21 | 富達通科技股份有限公司 | Circuit board module for induction type power supply system |
-
2018
- 2018-02-12 TW TW107105016A patent/TWI663806B/en active
- 2018-03-19 CN CN201810223784.2A patent/CN108565976B/en active Active
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102054057A (en) * | 2009-11-09 | 2011-05-11 | 上海华虹Nec电子有限公司 | Analog simulation method for RFID tag circuit |
US20110241436A1 (en) * | 2010-04-02 | 2011-10-06 | Advantest Corporation | Wireless power receiving apparatus and wireless power supply system |
CN202404630U (en) * | 2011-12-15 | 2012-08-29 | 中国银联股份有限公司 | Receiving terminal component for near field communication and receiving equipment comprising same |
US20150263531A1 (en) * | 2012-09-14 | 2015-09-17 | Sony Corporation | Non-contact electric power feeding system, terminal device, non-contact electric power feeding device, and non-contact electric power feeding method |
TWI596546B (en) * | 2013-06-28 | 2017-08-21 | 微科電子有限公司 | Rfid card learning apparatus, wearable produc and operating method thereof |
JP6122402B2 (en) * | 2014-08-05 | 2017-04-26 | パナソニック株式会社 | Power transmission device and wireless power transmission system |
CN106571692A (en) * | 2015-10-09 | 2017-04-19 | 纽艾吉科技有限公司 | Wireless electric power receiving device and demodulation method therefor |
TWI577108B (en) * | 2016-05-13 | 2017-04-01 | 富達通科技股份有限公司 | Induction type power supply system and intruding metal detection method thereof |
TWI604678B (en) * | 2016-09-07 | 2017-11-01 | 國立暨南國際大學 | Radio transmission system |
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