CN112884951A - Low-power-consumption card detection system, intelligent lock and card detection method - Google Patents
Low-power-consumption card detection system, intelligent lock and card detection method Download PDFInfo
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- CN112884951A CN112884951A CN202110113669.1A CN202110113669A CN112884951A CN 112884951 A CN112884951 A CN 112884951A CN 202110113669 A CN202110113669 A CN 202110113669A CN 112884951 A CN112884951 A CN 112884951A
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- infrared
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- pair
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
- G07C9/00309—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V8/00—Prospecting or detecting by optical means
- G01V8/10—Detecting, e.g. by using light barriers
-
- 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
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
- G06K19/07766—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card comprising at least a second communication arrangement in addition to a first non-contact communication arrangement
-
- 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
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
- G06K19/07773—Antenna details
- G06K19/07777—Antenna details the antenna being of the inductive type
- G06K19/07779—Antenna details the antenna being of the inductive type the inductive antenna being a coil
- G06K19/07783—Antenna details the antenna being of the inductive type the inductive antenna being a coil the coil being planar
Abstract
The invention discloses a low-power consumption card detection system, an intelligent lock and a card detection method, wherein the system comprises: the intelligent lock comprises an antenna and an induction pair tube, wherein the antenna is arranged on the intelligent lock; the induction pair tube comprises: a transmitting tube and a receiving tube; the induction pair tube comprises: a transmitting tube and a receiving tube; the transmitting tube and the receiving tube are matched devices; the receiving tube receives signals which are transmitted by the transmitting tube and reflected by the door card, wherein the induction pair tubes comprise one or a combination of infrared pair tubes, ultrasonic pair tubes and induction capacitance pair tubes. By applying the embodiment of the invention, the power consumption can be reduced while the card is remotely detected.
Description
Technical Field
The invention relates to the technical field of intelligent locks, in particular to a low-power-consumption card detection system, an intelligent lock and a card detection method.
Background
In the field of intelligent lock technology, RFID technology, i.e. line Radio Frequency Identification (RFID) technology, is commonly used to perform non-contact bidirectional data communication, and a radio frequency (rf) mode is used to read and write a recording medium (an electronic tag or an rf card), thereby achieving the purposes of identifying an object and exchanging data. And the two-way communication can also be realized by using NFC (near field communication), namely the NFC technology, and the NFC works at 13.56M, so that two devices carrying the NFC technology can perform data interaction when approaching. NFC products are theoretically within 20cm of communication distance, and most are within 10cm of communication distance. Since the two NFC devices do not contact each other, how to detect the door card close to the NFC devices is a technical problem to be solved urgently.
At present, most of lockset card detection methods are that after a user wakes up a lockset, the user transmits periodic transmission card detection data to wait for the response of the other party, and once receiving a response signal, the card detection step is completed, and then the following operations are performed. Also, in some cases, in a manner similar to that described in three patents of CN106066974CN 11156395 CN203324995, a method of detecting the amplitude change of the carrier signal to determine whether a card approaches is used. When a card approaches, the card end generates resonance after receiving the 13.56M frequency, and the resonance can absorb energy to cause the carrier voltage of the transmitting end to become lower, so that the approach of the card is detected.
However, in the conventional card detection system, electromagnetic waves are periodically or continuously radiated, and the door card detection is realized according to a feedback signal of the door card. But radiating electromagnetic waves causes a technical problem of high power consumption.
Disclosure of Invention
The invention aims to provide a low-power-consumption card detection method and a low-power-consumption card detection device so as to reduce the power consumption of card detection.
The invention solves the technical problems through the following technical scheme:
the invention provides a low-power consumption card detection system, which comprises: an antenna, an infrared pair of tubes, wherein,
the antenna is arranged on the intelligent lock;
the induction pair tube comprises: a transmitting tube and a receiving tube; the transmitting tube and the receiving tube are matched devices; the receiving tube receives signals which are transmitted by the transmitting tube and reflected by the door card, wherein the induction pair tubes comprise one or a combination of infrared pair tubes, ultrasonic pair tubes and induction capacitance pair tubes.
Optionally, the antenna is rectangular;
the infrared pair of tubes is located in the center of the antenna.
Optionally, the size of the antenna is 7cm by 7 cm.
Optionally, the system further includes: a control module, an NFC module, an infrared signal processing module and an infrared signal comparator, wherein,
the infrared signal processing module is used for conditioning the signals received by the infrared receiving tube;
the infrared signal comparator module is used for comparing the well-regulated infrared signals and outputting high-level or low-level signals to the control module after the comparison is finished;
the control module is used for controlling the field opening, field closing and data interaction functions of the NFC module, and controlling the emission interval and the emission duration of the infrared geminate transistor module; and the high level or low level signal output by the infrared signal comparator module is used for judging whether a shielding object is close to the infrared signal comparator module.
The invention provides an intelligent lock with a low-power-consumption card detection function, which comprises a low-power-consumption card detection system according to any one of the above items.
The invention provides a low-power-consumption card detection method, which is applied to any one of the low-power-consumption card detection systems, and comprises the following steps:
transmitting infrared signals at preset periodic intervals;
conditioning signals received by the infrared receiving tube, comparing the conditioned infrared signals, and judging that an object is close to the antenna when the comparison result is high level;
when the comparison result is low level, it is determined that no object is close to the antenna.
Optionally, the method further includes:
when an object is judged to be close to the antenna, the infrared geminate transistors are closed,
optionally, the method further includes: transmitting a handshake instruction and receiving a reply instruction to the handshake instruction;
when a reply instruction is received, confirming that the door card is detected;
and when the reply instruction is not received, returning to execute the step of transmitting the infrared signal according to the preset period interval.
Optionally, the method further includes:
and under the condition that the door card is detected, carrying out interaction of secret key information, and unlocking after verifying the secret key.
Compared with the prior art, the invention has the following advantages:
by applying the embodiment of the invention, the infrared geminate transistors are adopted to realize the detection of the approach of the object, and when the approach of the object is detected, electromagnetic waves are radiated to carry out the interaction of the door card.
Drawings
Fig. 1 is a schematic structural diagram of a low power consumption card detection system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a low power consumption card checking system according to an embodiment of the present invention;
fig. 3 is a schematic diagram illustrating a low power consumption card detection method according to an embodiment of the present invention.
Detailed Description
The following examples are given for the detailed implementation and specific operation of the present invention, but the scope of the present invention is not limited to the following examples.
It is emphasized that in the embodiment of the present invention, the approach detection of the object may be implemented by using an ultrasonic pair tube or an inductive capacitive pair tube. The ultrasonic wave geminate transistor and infrared ray geminate transistor principle are comparatively detailed, and the induction capacitance geminate transistor adopts two electric capacity poles of the earth that set up side by side promptly, when the object was close to, can change the dielectric constant between the two poles of the earth, and then realizes the response and detects.
The embodiment of the present invention will be described by taking an infrared pair tube as an example.
Fig. 1 is a schematic structural diagram of a low-power consumption card checking system according to an embodiment of the present invention, and as shown in fig. 1, a card swiping area is located on a panel of an intelligent lock, and most of the card swiping area is covered by an antenna. Since the size of the antenna may affect the coupling between two NFC devices or cards, and further determine the communication distance, the area of the antenna in this example is designed to be 7cm × 7cm, and the communication distance is around 8cm, and is located at the center of the smart lock.
The infrared geminate transistors are placed in the center of the antenna area, one of the two holes is a transmitting tube, the other hole is a receiving tube, when an object is shielded in front of the infrared geminate transistors, infrared reflection can occur, reflected waves are received by the receiving tube, and the distance of the shielding object can be judged by comparing the amplitude of the reflected waves after the reflected wave signals are conditioned. And if the distance reaches 8cm of the communication distance, the card detection is finished.
Fig. 2 is another schematic structural diagram of a low power consumption card checking system according to an embodiment of the present invention, and as shown in fig. 2, the embodiment of the present invention further includes the following modules:
an infrared pair transistor module comprising: an infrared ray transmitting tube, an infrared ray receiving tube; the infrared transmitting tube and the infrared receiving tube are matched devices; the infrared receiving tube receives the infrared rays emitted by the infrared emitting tube and reflected by the door card; and the infrared pair tube also comprises an infrared drive circuit.
The infrared signal processing module is responsible for signal conditioning of infrared reception, and generally needs to be provided with a filtering and amplifying part.
The infrared signal comparator module is responsible for comparing the adjusted infrared signals, and generally speaking, the sensing distance can be set by adjusting the comparison value of the comparator. And after the comparison is finished, outputting a signal of 0 or 1 to the control module. In the example of the present invention, the infrared wake-up distance is set to 8 cm.
The control module has three functions:
function 1: the NFC module is responsible for control, including field opening, namely opening the electromagnetic wave radiation function; turning off the field, namely turning off the electromagnetic wave radiation function; a data interaction function;
function 2: controlling the timing of the infrared pair tube module, including the emission interval and the continuous emission time, so as to effectively reduce the power consumption;
function 3: and judging a 0 or 1 signal of the infrared signal, and judging that a shielding object approaches when the comparison result of the infrared signal is 1.
The NFC module is composed of a chip for NFC communication, an NFC antenna, a peripheral power supply and other circuits, and is mainly used for receiving and transmitting data and carrier waves of the NFC communication.
The control module is a main controller of the lockset, generally a low-power consumption MCU, and can also be other logic devices, a digital processing chip and the like.
FIG. 3 is a schematic diagram illustrating a low-power-consumption card detection method according to an embodiment of the present invention, and as shown in FIG. 3, the whole card detection process is divided into three parts
First, in the entrance detection stage, the pair of infrared tubes will emit infrared waves with a period of T2, the duration of emission is T1, T1< < T2, and by controlling the duration of emission and the interval time between emission, the emission current can be well controlled, in the example, the duration of emission is 50us, the interval time is 500ms, the emission current is 50mA, the emission time per second is 100us, and then the average current is 50mA 100us/1000ms is 5 uA. The reflected receive amplitude is detected synchronously with each transmission. In the stage, whether an object shelters the infrared pair transistor is judged through the control module and the infrared pair transistor enters a responding distance range.
Then, in the stage of entrance confirmation, the attenuation coefficient of infrared in the air is certain, infrared energy reflected back through different distances can be reduced in a quasi-linear mode, and the approaching distance can be effectively judged by checking the amplitude of the reflected voltage. When received voltage is greater than V1, it is close to mean that there is the shelter in geminate transistor the place ahead, and the distance is less than our completion and examines the card action, closes infrared geminate transistor, and at this moment, NFC module transmission handshake instruction, if have NFC equipment to enter, can reply handshake instruction, when receiving the reply, confirm for having equipment to enter, it awakens up to be the mistake not, accomplishes and examines the card. If the reply is not received, the false awakening is confirmed, the NFC module is closed, the infrared is opened, and the equipment continues to sleep.
And finally, in the NFC interaction stage, after the successful confirmation of the entrance, the two NFC devices perform normal device interaction with each other. And in the NFC unlocking action of the intelligent lock, the two devices perform key information interaction. And unlocking after verification is completed.
In the prior art, handshake data are periodically transmitted, a mode of waiting for the opposite side to respond is adopted, power consumption is very high, the possibility is about 10mA, and the method is hardly applicable to low-power-consumption battery application of a lockset. So most locks only transmit handshake data carriers after waking up the locks. And closing the carrier wave after the lock is dormant. Therefore, the user needs to wake up the lock in other ways and then use the mobile phone or the card of the NFC to approach the lock to verify the unlocking operation. For example, in the prior art, three inventions with the document number of CN106066974CN111563395CN203324995 and the so-called low power consumption card searching at present, in order to achieve the purpose of low power consumption, compared with the traditional card detecting mode, the time for transmitting carriers is greatly compressed, the traditional card detecting mode lasts for periodic transmission of ms level, and the transmission time of the three inventions may be in us level, so that the average power consumption can be obviously reduced. While the short time is short, the energy is small, the small energy is not enough to enable the antenna circuit of the opposite side to resonate at a long distance, the induction distance is greatly reduced, the normal communication distance is probably within 10cm, and the low-power-consumption card detection modes of the three patents seriously compress the card detection distance, generally below 3 cm. The communication distance can be 10cm, the card detection distance can only be 3cm, and in the process of unlocking the mobile phone of the user through NFC, the mobile phone can only be sensed at the position of 3cm and can only initiate communication.
The invention provides a low-power-consumption card detection implementation mode through infrared geminate transistors, which can perfectly start NFC communication in time when the progress of equipment is detected at a longer distance through the infrared geminate transistors, has extremely low power consumption and is very suitable for intelligent lock battery application.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. A low power consumption card checking system, the system comprising: an antenna, an induction pair tube, wherein,
the antenna is arranged on the intelligent lock;
the induction pair tube comprises: a transmitting tube and a receiving tube; the transmitting tube and the receiving tube are matched devices; the receiving tube receives signals which are transmitted by the transmitting tube and reflected by the door card, wherein the induction pair tubes comprise one or a combination of infrared pair tubes, ultrasonic pair tubes and induction capacitance pair tubes.
2. A low power consumption card checking system according to claim 1, wherein the antenna is rectangular in shape;
the infrared pair of tubes is located in the center of the antenna.
3. A low power consumption card checking system according to claim 1, wherein the antenna has a size of 7cm by 7 cm.
4. The low power consumption card checking system according to claim 1, further comprising: a control module, an NFC module, an infrared signal processing module and an infrared signal comparator, wherein,
the infrared signal processing module is used for conditioning the signals received by the infrared receiving tube;
the infrared signal comparator module is used for comparing the well-regulated infrared signals and outputting high-level or low-level signals to the control module after the comparison is finished;
the control module is used for controlling the field opening, field closing and data interaction functions of the NFC module, and controlling the emission interval and the emission duration of the infrared geminate transistor module; and the high level or low level signal output by the infrared signal comparator module is used for judging whether a shielding object is close to the infrared signal comparator module.
5. A smart lock with a low power consumption card checking function, characterized by comprising a low power consumption card checking system according to any one of claims 1-4.
6. A low-power card checking method is applied to the low-power card checking system of any one of claims 1 to 4, and the method comprises the following steps:
transmitting infrared signals at preset periodic intervals;
conditioning signals received by the infrared receiving tube, comparing the conditioned infrared signals, and judging that an object is close to the antenna when the comparison result is high level;
when the comparison result is low level, it is determined that no object is close to the antenna.
7. The low-power-consumption card detection method according to claim 6, further comprising:
and when the object is judged to be close to the antenna, closing the infrared pair tube.
8. The low-power-consumption card detection method according to claim 6, further comprising: transmitting a handshake instruction and receiving a reply instruction to the handshake instruction;
when a reply instruction is received, confirming that the door card is detected;
and when the reply instruction is not received, returning to execute the step of transmitting the infrared signal according to the preset period interval.
9. The low-power-consumption card detection method according to claim 6, further comprising:
and under the condition that the door card is detected, carrying out interaction of secret key information, and unlocking after verifying the secret key.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110113669.1A CN112884951A (en) | 2021-01-27 | 2021-01-27 | Low-power-consumption card detection system, intelligent lock and card detection method |
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| CN202110113669.1A CN112884951A (en) | 2021-01-27 | 2021-01-27 | Low-power-consumption card detection system, intelligent lock and card detection method |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102768781A (en) * | 2012-08-17 | 2012-11-07 | 褚维戈 | NFC (Near Field Communication) mobile phone electronic lock control system and NFC mobile phone electronic lock control device |
| CN202916842U (en) * | 2012-11-22 | 2013-05-01 | 汉朗科技(北京)有限责任公司 | Electronic label system based on near field wireless communication technology |
| CN103218587A (en) * | 2013-04-11 | 2013-07-24 | 广东省电信规划设计院有限公司 | Proximity sensor, radio frequency identification (RFID) card reader and proximity sensing method |
| CN103839088A (en) * | 2012-11-22 | 2014-06-04 | 汉朗科技(北京)有限责任公司 | Electronic label system based on near-distance wireless communication technology, and electronic label updating method |
| CN106605242A (en) * | 2014-08-06 | 2017-04-26 | 美国联合包裹服务公司 | Concepts for monitoring shipments |
| CN106706862A (en) * | 2017-02-23 | 2017-05-24 | 北京工业大学 | In-car pollution gas monitoring device based on GSM (Global System for Mobile Communications) communication technology |
| CN206309100U (en) * | 2016-11-13 | 2017-07-07 | 国网吉林省电力有限公司检修公司 | The automatic square climbing device of electric power tower |
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2021
- 2021-01-27 CN CN202110113669.1A patent/CN112884951A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102768781A (en) * | 2012-08-17 | 2012-11-07 | 褚维戈 | NFC (Near Field Communication) mobile phone electronic lock control system and NFC mobile phone electronic lock control device |
| CN202916842U (en) * | 2012-11-22 | 2013-05-01 | 汉朗科技(北京)有限责任公司 | Electronic label system based on near field wireless communication technology |
| CN103839088A (en) * | 2012-11-22 | 2014-06-04 | 汉朗科技(北京)有限责任公司 | Electronic label system based on near-distance wireless communication technology, and electronic label updating method |
| CN103218587A (en) * | 2013-04-11 | 2013-07-24 | 广东省电信规划设计院有限公司 | Proximity sensor, radio frequency identification (RFID) card reader and proximity sensing method |
| CN106605242A (en) * | 2014-08-06 | 2017-04-26 | 美国联合包裹服务公司 | Concepts for monitoring shipments |
| CN206309100U (en) * | 2016-11-13 | 2017-07-07 | 国网吉林省电力有限公司检修公司 | The automatic square climbing device of electric power tower |
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Application publication date: 20210601 |