TW476923B - Passive (powerless) RF ID using successive charging method - Google Patents

Abstract

A passive (powerless) RF ID using successively inductive charging method employs the current inducted by a successive radio signal at fixed frequency to charge. Further use the charged power to generate another frequency shift key (FSK) radio signal, writing to a series of ID in memory in advance and sending them out. The invention includes the individually independent inductive charging module and ID forwarding module with different frequencies capable of simultaneously and continuously charging and issuing ID to improve the access speed of ID.

Description

476923 V. Description of the invention (1) The present invention is a passive (no power) RF 1D using continuous inductive charging. It contains two different frequency and independent radio frequency (RF) module blades for inductive charging and identification code. For sending, inductive charging and identification code sending can be performed at the same time to improve the speed of reading the identification code. According to the current general passive (no power) RF ID, a set of shared RF modules are used for inductive charging and For the transmission of the identification code, in addition to requiring the same or similar radio frequency, the identification code cannot be sent during inductive charging or the inductive charging must be interrupted during the identification code transmission, so that the speed of reading the identification code cannot be improved. not ideal. Therefore, the main object of the present invention is to provide a passive (no power) RF ID that can perform inductive charging and identification code transmission at the same time, so as to improve the speed of reading the identification code. In addition, since inductive charging and identification code transmission use two different frequency and independent RF modules, the continuous fixed-frequency radio wave generator (RF Generator) required for inductive charging can be independent of the identification code reader ( id Reader). Another object of the present invention is to simplify the design of the ID reader into an ID Receiver with a Receive Only function. Therefore, a single RF ID of the present invention sends The identification code can be received by multiple identification code receivers at the same time without interference, which is more practical. The main features and novelty of the present invention will become clearer with the detailed description of the following drawings, as shown in the figure:

476923 V. Description of the invention (2) '~' ^^ The first diagram is an embodiment of the present invention, the second diagram is a circuit block diagram of the present invention, and the third diagram is an operation flowchart of the present invention. ... Inductive charging 4 US group 11 ......... Receiving antenna 12 ..... Tuning circuit unit 13 ... Charging capacitor 14 .... Rectification and stabilization unit 4 .. 41… • •• Identification code sending module 42 .. 43… •• Frequency shift key modulation unit 疋

2 ··· Identification code storage module Please refer to the second figure, the function of each module of the present invention is detailed as follows ·

The function of the inductive charging module 1 is to generate electric energy, which mainly includes a receiving antenna 11, a tuning circuit unit 12, a charging capacitor 13, and a rectifying and stabilizing unit 14. The receiving antenna 11 and the tuning circuit unit 12 are designed for the fixed frequency of the aforementioned radio wave generator so that they can generate the best induced current. The charging capacitor 1 3 stores the induced current and outputs it to the other rectification and stabilization unit 4 and outputs it to other Module used. The identification code storage module 2 is a programmable memory, which can write a series of binary identification codes, that is, IDs.

Page 5 476923 V. Description of the invention (3) '--- The encoding method of the code (Encoding) can be different for different applications (Application) but all contain BBC (Binary B1〇ck c〇des) error detection code To increase the reliability of data transmission. The function of the identification code sending module 4 is to send an identification code, which mainly includes a frequency shift key modulation unit 41 (FSK Modulator), a radio frequency power setting unit 42 (KF Power Tuner), and a transmitting antenna 43. The frequency shift key modulation unit 41 will The binary identification code data is adjusted to the carrier frequency and frequency shift required for transmission. That is, if the carrier frequency is F2 and the frequency shift is F3, then the transmission frequency of the binary identification code is F2 ± F3. The RF power setting unit 42 can set the transmission power when the identification code is transmitted, and the effective distance of the radio wave transmission is controlled by the setting of the RF power, that is, the identification code receiver must be placed within this effective distance radius to receive the correct In addition, because of the limitation of the radio frequency power, multiple RF IDs of the present invention can be prevented from interfering with each other at the same time, and different effective distances can be set due to the needs of different applications. The function of the central control module 3 is to generate the clock required for the transmission of the identification code, and then send the identification code bit by bit to the frequency shift key modulation unit 41. In addition, the central control module is also responsible for the on / off of the identification code sending module 4 (On / 0f f), and will turn off the (Turn Of f) identification code sending module 4 when no identification code is being sent to save power. Therefore, the central control module 3 determines the data rate (j) ata Rate) and the transmission cycle (Cycle) when the identification code is sent. Please refer to the third figure. The operation mode of the present invention will be more clear through the description of the following steps, in which the continuous fixed frequency

476923 V. Description of the invention (4) The radio wave is generated by a radio wave generator independent of the receiver of the identification code. Please refer to the first picture at the same time. The charging process is continuous. Step 1 The present invention is placed under a continuous coverage of a fixed frequency radio wave, and the inductive charging module starts to continuously charge. Step 2: Accumulation of charging energy—After the closing action, the central control module is activated and the sleep mode is completed.

Step 3 Ω 1 hour = 2 steps 1 ί The control module leaves the sleep mode and turns on the identification code to send the hibiscus. Day, _ ^% tons Ming 鍅 π 燧 ®-, sends the data in the identification code storage module Incoming frequency shift key modulation ^ 'Start sending identification mark. Step four

After: The central control module turns off the identification code sending module and then step five Repeat steps three and four

Page 7 476923 V. Description of the invention (5) As shown in Figure 1, the present invention can also simplify the design of the identification code reader and become an identification code receiver with only a receiving function, so that the identification sent by the RF ID of the present invention The code can be received by multiple identification code receivers at the same time without interference, and it is more practical. π As mentioned above, the present invention uses different frequencies and the respective electrical modules and identification codes to send inverse grips ^ | ^ j ^ m jl and send identification codes to connect to the ancient mother's mouth 丨 Ma 仃 charge% 呌 ^ M j ^ Ah identification The speed at which the code is read is designed for practical use, and it is a new one to be examined under the name of the bureau of the last name. As early as Kui, he filed a patent application in accordance with the law, and prayed for granting a quasi-patent. .

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Claims (1)

476923 VI. Patent Application Range RF: 2 ?: Passive (no power) for continuous inductive charging Kr IV 9 mainly includes ... (1) Inductive charging module: including receiving antenna, tuning circuit unit, charging capacitor and rectifier voltage regulator unit. (2) Identification code storage module: It is a programmable memory. (3) Identification code sending module: includes frequency shift key modulation unit, RF power setting unit and transmitting antenna. Λ (4) Central control module: Generates the sequence required for sending the identification code. Two independent RF modules with different frequencies are used for inductive charging and identification code transmission, so that inductive charging and identification code transmission can be performed at the same time to improve the speed of reading the identification code. 2. The passive RF ID as described in the scope of application for patent 1. In which, the inductive charging and identification code transmission use two different frequency and independent RF modules, so the continuous fixed frequency required for inductive charging The radio wave generator is independent of the identification code receiver which has only a receiving function. 3. The passive RFID as described in patent application range 2. In which the continuous fixed-frequency radio waves required for the inductive charging are generated by a radio wave independent of an identification code receiver that has only a receiving function Device, so that it will not be interrupted by the identification code. 4. The passive RF ID as described in the scope of patent application 1. Wherein the present invention uses an identification code receiver with only a receiving function, the identification code sent by a single RF ID of the present invention can be received by multiple identification codes at the same time Receiver without interference. 476923 VI. Application for patent scope 5. The passive RF ID as described in patent application scopes 1 and 2. Among them, the present invention can control the effective distance of the identification code transmission by the RF power setting unit, so that a continuous fixed The radio wave generator of the frequency can cause multiple ID codes of the present invention to transmit identification codes at the same time without causing interference. Page 10