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Method and apparatus for self-adaptive gain adjustment

A technology for self-adaptive adjustment and gain adjustment, applied in the field of smart cards, can solve the problems of inapplicable gain, prolong the communication time between the terminal and the card, etc., and achieve the effect of shortening the communication time

Active Publication Date: 2017-02-22
FEITIAN TECHNOLOGIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the prior art, after the contactless card enters the contactless field, it is often in a moving state (for example, when the contactless card is approaching the terminal) and has already started to communicate with the terminal; although the terminal has the ability of self-adaptation, it can The change of the external field strength can adjust the size of its own gain, but once the gain is selected when the terminal inquires the card, the subsequent change of the contactless card position will cause the selected gain to be inapplicable to the external field strength, so there is a need to re-inquire The card problem prolongs the communication time between the terminal and the card

Method used

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  • Method and apparatus for self-adaptive gain adjustment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1 of the present invention provides a method for adaptively adjusting gain, such as figure 1 shown, including:

[0028] Step 101: The terminal detects whether the card enters the contactless field, if yes, execute step 102, otherwise continue to execute step 101;

[0029] Specifically, the terminal detects the external field strength, and judges whether the detected field strength value is greater than a preset threshold value, and if so, confirms that no card enters the non-contact field; otherwise, confirms that a card enters the non-contact field;

[0030] In this embodiment, the preset threshold value is specifically the critical value of the external field strength when the card enters the non-contact field. Preferably, the preset threshold value is 7.0v, and is stored in a register of the terminal.

[0031] Step 102: The terminal detects and records the external field strength multiple times, and judges whether the change of the external field strength...

Embodiment 2

[0083] Embodiment 2 of the present invention provides a method for adaptively adjusting gain, such as figure 2 shown, including:

[0084] Step 201: The terminal initializes and opens the contactless field;

[0085] Specifically, the terminal initializes the amplitude value of the output field strength to a standard value, and opens the non-contact field according to the initialized standard value;

[0086] It should be noted that the standard value of the output field strength is different according to the different cards;

[0087] Preferably, in this embodiment, the card is a Felica card, and the amplitude value of the terminal initialization output field strength is 8.2v;

[0088] Step 202: The terminal judges whether there is a card entering the contactless field, if yes, execute step 204, otherwise execute step 203;

[0089] Specifically, the terminal detects the external field strength, and judges whether the detected field strength value is greater than a preset thre...

Embodiment 3

[0144] Embodiment 3 of the present invention provides a method for adaptively adjusting gain, such as image 3 shown, including:

[0145] Step 301: The terminal initializes and opens the contactless field;

[0146] Specifically, the terminal initializes the amplitude value of the output field strength to a standard value, and opens the non-contact field according to the initialized standard value;

[0147] It should be noted that the standard value of the output field strength is different according to the different cards;

[0148] Preferably, in this embodiment, the card is a Felica card, and the amplitude value of the terminal initialization output field strength is 8.2v.

[0149] Step 302: The terminal detects whether there is a card entering the contactless field, if yes, execute step 304, otherwise execute step 303;

[0150] Specifically, the terminal detects the external field strength, and judges whether the detected field strength value is greater than a preset thre...

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Abstract

The invention discloses a method and apparatus for self-adaptive gain adjustment which belong to the intelligent card field. The method comprises the following steps. When a terminal detects the entrance of a card into a non-field, the terminal repeatedly detects the external field strength and records it; according to the recorded external field strength value, the change of the external field strength is determined whether to be within a preset range; if the answer is yes, card inquiry instructions are sent to the non-field at a preset gain in succession so as to obtain card inquiry results; the card inquiry result corresponding to the preset gain is recorded; and according to the recorded card inquiring result corresponding to the preset gain, the final gain is determined so as to realize the data communication of the final gain with the card. If the answer is no, the terminal continues to detect whether the card has entered the non-field or not. According to the technical schemes of the invention, after a non-contact card enters a non-field, for the non-contact card in motion state, when its position change leads to the change of an external field within a preset range, the terminal can constantly adjust its gains to adapt to the external field strength so as to ensure the smooth communications and shorten the communication time.

Description

technical field [0001] The invention relates to the field of smart cards, in particular to a method and device for adaptively adjusting gain. Background technique [0002] In the prior art, after the contactless card enters the contactless field, it is often in a moving state (for example, when the contactless card is approaching the terminal) and has already started to communicate with the terminal; although the terminal has the ability of self-adaptation, it can The change of the external field strength can adjust the size of its own gain, but once the gain is selected when the terminal inquires the card, the subsequent change of the contactless card position will cause the selected gain to be inapplicable to the external field strength, so there is a need to re-inquire The card problem prolongs the communication time between the terminal and the card. Contents of the invention [0003] The object of the present invention is to provide a method and device for adaptively...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K7/10
CPCG06K7/10198G06K7/10297G06K7/10801
Inventor 陆舟于华章
Owner FEITIAN TECHNOLOGIES