CN113627204A - Card identification circuit, power supply method thereof and door lock - Google Patents
Card identification circuit, power supply method thereof and door lock Download PDFInfo
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- CN113627204A CN113627204A CN202110900208.9A CN202110900208A CN113627204A CN 113627204 A CN113627204 A CN 113627204A CN 202110900208 A CN202110900208 A CN 202110900208A CN 113627204 A CN113627204 A CN 113627204A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
- G06K7/10316—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers
- G06K7/10336—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers the antenna being of the near field type, inductive coil
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B49/00—Electric permutation locks; Circuits therefor ; Mechanical aspects of electronic locks; Mechanical keys therefor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
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Abstract
The application discloses a card identification circuit, a power supply method thereof and a door lock, and relates to the technical field of electronics. The detection circuit in the card identification circuit can send an indication signal to the control circuit when detecting that the distance between the detection circuit and the target object is less than a threshold value. The control circuit can control the power supply circuit to stop supplying power to the card reading circuit in the dormant state, and can control the power supply circuit to supply power to the card reading circuit after receiving the indication signal. Because the power supply circuit does not need to continuously supply power for the card reading circuit, the power consumption of the card identification circuit is effectively reduced. And moreover, the control circuit can control the power supply circuit to supply power to the card reading circuit in time when the target object is determined to approach. Therefore, the card information can be timely read, and the working reliability of the card identification circuit is further ensured.
Description
Technical Field
The application relates to the technical field of electronics, in particular to a card identification circuit, a power supply method thereof and a door lock.
Background
Along with the development of the technology, the functions of the intelligent door lock are more and more abundant.
In the related art, an intelligent door lock generally includes a power supply, a main control circuit, a card reading circuit, a touch detection circuit, and a driving circuit. The power supply can respectively supply power to the main control circuit, the card reading circuit, the touch control detection circuit and the driving circuit. The main control circuit can control the driving circuit to execute unlocking operation based on the door card information read by the card reading circuit or the touch control signal detected by the touch control detection circuit.
However, in the related art smart door lock, the power supply needs to continuously supply power to each circuit, which results in high power consumption of the smart door lock.
Disclosure of Invention
The application provides a card identification circuit, a power supply method thereof and a door lock, which can solve the problem that the power consumption of the card identification circuit is high in the related technology. The technical scheme is as follows:
in one aspect, a card identification circuit is provided, the card identification circuit comprising: the device comprises a detection circuit, a control circuit, a power circuit and a card reading circuit;
the detection circuit is connected with the control circuit and is used for sending an indication signal to the control circuit if the distance between the detection circuit and a target object is smaller than a threshold value;
the control circuit is also connected with the power circuit and is used for controlling the power circuit to stop supplying power to the card reading circuit when the card identification circuit is in a dormant state and controlling the power circuit to supply power to the card reading circuit after receiving the indication signal;
the card reading circuit is connected with the control circuit and is used for reading card information under the driving of the power circuit and transmitting the card information to the control circuit.
Optionally, the detection circuit is a touch sensing circuit;
the touch sensing circuit is used for determining that the distance between the touch sensing circuit and the target object is smaller than a threshold value if the sensed signal value of the touch sensing signal of the target object is within the signal value range.
Optionally, the card reading circuit includes: the card reading antenna and the information reading sub-circuit are connected with the card reading antenna;
the card reading antenna is positioned in the setting area of the touch sensing circuit and is used for transmitting a sensing signal of a card sensed by the card reading antenna to the information reading sub-circuit;
the information reading sub-circuit is further connected with the control circuit, and the information reading sub-circuit is used for reading card information of the card based on the induction signal and transmitting the card information to the control circuit.
Optionally, the control circuit is further configured to:
and if the card information sent by the card reading circuit is not received within the target time length after the power supply circuit is controlled to supply power to the card reading circuit, controlling the power supply circuit to stop supplying power to the card reading circuit.
Optionally, the card identification circuit further comprises: a switching circuit;
the first end of the switch circuit is connected with the power supply circuit, the second end of the switch circuit is connected with the card reading circuit, and the control end of the switch circuit is connected with the control circuit;
the control circuit is used for controlling the on-off state of the first end and the second end of the switch circuit.
In another aspect, there is provided a door lock including: a drive circuit and a card recognition circuit as described above;
the control circuit in the card identification circuit is also connected with the drive circuit, and the control circuit is also used for controlling the drive circuit to execute unlocking operation if the card information transmitted by the card reading circuit is confirmed to pass verification.
In another aspect, a method for supplying power to a card identification circuit is provided, the card identification circuit including a power circuit and a card reading circuit; the method comprises the following steps:
when the card identification circuit is in a dormant state, controlling the power supply circuit to stop supplying power to the card reading circuit;
and if the distance between the power supply circuit and the target object is detected to be smaller than the threshold value, controlling the power supply circuit to supply power to the card reading circuit.
Optionally, the detecting that the distance to the target object is smaller than the threshold includes: and if the sensed signal value of the touch sensing signal of the target object is within the signal value range, determining that the distance between the touch sensing signal and the target object is less than a threshold value.
Optionally, the method further comprises: and if the card information sent by the card reading circuit is not received within the target time length after the power supply circuit is controlled to supply power to the card reading circuit, controlling the power supply circuit to stop supplying power to the card reading circuit.
Optionally, the card identification circuit further comprises: a first end of the switch circuit is connected with the power supply circuit, and a second end of the switch circuit is connected with the card reading circuit;
the controlling the power circuit to stop supplying power to the card reading circuit includes: controlling the first end and the second end of the switch circuit to be disconnected;
the control the power supply circuit is for the card reading circuit power supply includes: and controlling the conduction of the first end and the second end of the switch circuit.
In still another aspect, a computer-readable storage medium is provided, in which a computer program is stored, the computer program being loaded by a control circuit and executing the power supply method of the card identification circuit provided in the above aspect.
In a further aspect, there is provided a computer program product containing instructions which, when run on a computer, cause the computer to carry out the method of powering a card identification circuit as provided in the above aspect.
The beneficial effect that technical scheme that this application provided brought includes at least:
the application provides a card identification circuit, a power supply method thereof and a door lock. The detection circuit in the card identification circuit can send an indication signal to the control circuit when detecting that the distance between the detection circuit and the target object is less than a threshold value. The control circuit can control the power supply circuit to stop supplying power to the card reading circuit in the dormant state, and can control the power supply circuit to supply power to the card reading circuit after receiving the indication signal. Because the power supply circuit does not need to continuously supply power for the card reading circuit, the power consumption of the card identification circuit is effectively reduced. And moreover, the control circuit can control the power supply circuit to supply power to the card reading circuit in time when the target object is determined to approach, so that the card information can be read in time, and the working reliability of the card identification circuit is further ensured.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a card identification circuit according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of another card identification circuit provided in an embodiment of the present application;
FIG. 3 is a partial block diagram of a card identification circuit according to an embodiment of the present disclosure;
FIG. 4 is a schematic structural diagram of a door lock provided in an embodiment of the present application;
fig. 5 is a flowchart of a power supply method of a card identification circuit according to an embodiment of the present application.
Detailed Description
Fig. 1 is a schematic structural diagram of a card identification circuit according to an embodiment of the present disclosure. As shown in fig. 1, the card recognition circuit 00 includes: the circuit comprises a detection circuit 01, a control circuit 02, a power circuit 03 and a card reading circuit 04. The control circuit 02 may be a Micro Controller Unit (MCU).
The detection circuit 01 is connected to the control circuit 02, and the detection circuit 01 transmits an instruction signal to the control circuit when detecting that the distance to the target object is smaller than a threshold value. The indication signal is used for indicating that the distance between the target object and the target object is less than a threshold value, namely, the indication signal is used for indicating that the target object is close to the target object currently.
The control circuit 02 is further connected to the power circuit 03, and the control circuit 02 is configured to control the power circuit 03 to stop supplying power to the card reading circuit 04 when the card identification circuit 00 is in the sleep state, and control the power circuit 03 to supply power to the card reading circuit 04 after receiving the indication signal.
The card reading circuit 04 is connected to the control circuit 02, and the card reading circuit 04 is used for reading card information under the driving of the power circuit 03 and transmitting the card information to the control circuit 02. The card information may be a set of binary numbers.
It can be understood that, if the detection circuit 01 does not detect the target object within the preset time period and/or the card reading circuit 04 does not detect the sensing signal of the card within the preset time period, the control circuit 02 may control the card identification circuit 00 to enter the sleep state.
In the embodiment of the present application, when the detection circuit 01 detects that the distance from the target object is greater than or equal to the threshold, it may be determined that the target object does not have an incentive to use the card recognition circuit 00, and the detection circuit 01 does not send an indication signal to the control circuit 02. When the detection circuit 01 detects that the distance from the target object is less than the threshold value, it can be determined that the target object has an incentive to use the card recognition circuit 00, and the detection circuit 01 can transmit the detected indication signal to the control circuit 02. The control circuit 02 may further control the power circuit 03 to supply power to the card reading circuit 04 in response to the indication signal, so that the card reading circuit 04 can be in a working state, and information of the card can be read in time.
It is understood that, as shown in fig. 1, the power circuit 03 can also supply power to the detection circuit 01 and the control circuit 02 respectively to drive the detection circuit 01 and the control circuit 02 to operate.
To sum up, the embodiment of the application provides a card identification circuit. The detection circuit in the card identification circuit can send an indication signal to the control circuit when detecting that the distance between the detection circuit and the target object is less than a threshold value. The control circuit can control the power supply circuit to stop supplying power to the card reading circuit in the dormant state, and can control the power supply circuit to supply power to the card reading circuit after receiving the indication signal. Because the power supply circuit does not need to continuously supply power for the card reading circuit, the power consumption of the card identification circuit is effectively reduced. And moreover, the control circuit can control the power supply circuit to supply power to the card reading circuit in time when the target object is determined to approach, so that the card information can be read in time, and the working reliability of the card identification circuit is further ensured.
Fig. 2 is a schematic structural diagram of another card identification circuit provided in the embodiment of the present application. As shown in fig. 2, the card recognition circuit 00 may further include a switch circuit 05. The first terminal I1 of the switch circuit 05 is connected to the power circuit 03, the second terminal I2 of the switch circuit 05 is connected to the card reading circuit 04, and the control terminal C0 of the switch circuit 05 is connected to the control circuit 02. The control circuit 02 is used for controlling the on-off states of the first terminal I1 and the second terminal I2 of the switch circuit 05.
It is understood that the first terminal I1 of the switch circuit 05 and the power circuit 03, and the second terminal I2 of the switch circuit 05 and the card reading circuit 04 can be connected by power lines. The control terminal C0 of the switch circuit 05 and the control circuit 02 may be connected by a signal line.
The control circuit 02 can transmit a first switch signal to the control terminal C0 of the switch circuit 05 through the signal line to control the first terminal I1 of the switch circuit to be disconnected from the second terminal I2, so that the power circuit 03 stops supplying power to the card reading circuit 04. The control circuit 02 can also send a second switch signal to the control terminal C0 of the switch circuit 05 through the signal line to control the first terminal I1 and the second terminal I2 of the switch circuit to be conducted, so that the power circuit 03 can supply power to the card reading circuit 04.
Here, the switch circuit 05 may also be referred to as a power supply control circuit. The switching circuit 05 may comprise a switching transistor or a power management chip, which may be a power switching tube or a switchable power chip, for example.
As a possible example, as shown in fig. 2, the detection circuit 01 may be a touch sensing circuit 01. The touch sensing circuit 01 is configured to determine that a distance to the target object is smaller than a threshold value if a signal value of a touch sensing signal of the sensed target object is within a signal value range.
The touch sensing circuit can be a capacitive touch sensing circuit. When the object approaches the touch sensing circuit 01, a capacitance may be formed between the surface of the touch sensing circuit and the object. The touch sensing circuit may determine that the distance to the target object is less than the threshold value when detecting that the capacitance value of the capacitor is within the capacitance value range. That is, the touch sensing signal is a capacitance formed between the surface of the touch sensing circuit and the target object, and the signal value of the touch sensing signal is a capacitance value of the capacitance.
As another possible example, the detection circuit 01 may also be a distance sensor that can directly detect the distance between the distance sensor and the target object.
As yet another possible example, the detection circuit 01 may also be an infrared sensor. The infrared sensor may emit infrared light and measure the time the infrared light is reflected back from being emitted to being reflected by the target. Further, the distance to the target object can be determined based on the time and the transmission speed of the infrared light.
With continued reference to FIG. 2, the card reading circuit 04 may include: a card reading antenna 041 and an information reading sub-circuit 042 connected to the card reading antenna 041. The card reading antenna 041 and the information reading sub-circuit 042 may be connected by a signal line.
The card reading antenna 041 is configured to transmit a sensing signal of the card sensed by the card reading antenna 041 to the information reading sub-circuit 042. The information reading sub-circuit 042 is configured to receive an induction signal sent by the card reading antenna 041, read card information based on the induction signal, and transmit the read card information to the control circuit 02. The card information may be a set of binary numbers.
Alternatively, the card reading antenna 041 may be an induction coil. Moreover, for a scenario in which the detection circuit 01 is a touch sensing circuit 01, the card reading antenna 041 may be located in the setting area of the touch sensing circuit 01. Therefore, when the target object is ready to perform the card reading operation, the touch sensing circuit 01 can detect the touch sensing signal of the target object in time, so as to send the indication signal to the control circuit 02 in time.
For example, as shown in fig. 2, the touch sensing circuit 01 may include a touch sensing module 011 and a touch detection module 012. The touch sensing module 011 and the touch detecting module 012 can be connected by a signal line. The touch sensing module 011 is configured to sense a touch sensing signal and transmit the sensed touch sensing signal to the touch detection module 012. The touch detection module 012 is configured to receive and process the touch sensing signal. For example, it may be determined whether the distance between the touch sensing module 011 and the target object is less than a threshold value based on the touch sensing signal, and send an indication signal to the control circuit 02 when the distance is less than the threshold value.
Referring to fig. 3, the card reading antenna 041 may be located in the setting area of the touch sensing module 011. That is, the card reading antenna 041 and the touch sensing circuit 01 may be located on the same side of the same circuit board. However, the interference between the sensing signal sensed by the card reading antenna 041 and the touch sensing signal sensed by the touch sensing circuit 01 is negligible.
Optionally, the control circuit 02 may also be configured to: if the card information sent by the card reading circuit 04 is not received within the target time length after the power supply circuit 03 is controlled to supply power to the card reading circuit 04, the power supply circuit 03 is controlled to stop supplying power to the card reading circuit 04.
If the card reading circuit 04 does not detect the card information within the target time length, the card information is not sent to the control circuit 02. Accordingly, the control circuit 02 may determine that no card is currently close to the card reading circuit 04, and thus may control the power supply circuit 03 to stop supplying power to the card reading circuit 04, so as to reduce the power consumption of the card identification circuit 00. The target time length may be a fixed time length pre-stored in the control circuit 02, for example, the target time length may be 10 seconds or 15 seconds.
It is understood that the target time period may or may not be equal to the preset time period.
To sum up, the embodiment of the application provides a card identification circuit. The detection circuit in the card identification circuit can send an indication signal to the control circuit when detecting that the distance between the detection circuit and the target object is less than a threshold value. The control circuit can control the power supply circuit to stop supplying power to the card reading circuit in the dormant state, and can control the power supply circuit to supply power to the card reading circuit after receiving the indication signal. Because the power supply circuit does not need to continuously supply power for the card reading circuit, the power consumption of the card identification circuit is effectively reduced. And moreover, the control circuit can control the power supply circuit to supply power to the card reading circuit in time when the target object is determined to approach. Therefore, the card information can be timely read, and the working reliability of the card identification circuit is further ensured.
The embodiment of the present application further provides a door lock, as shown in fig. 4, the door lock includes a driving circuit 10, and the card identification circuit 00 provided in the above embodiment. The structure of the card recognition circuit 00 can refer to fig. 1 or fig. 2.
Referring to fig. 4, the control circuit 02 in the card identification circuit 00 is further connected to the driving circuit 10, and the control circuit 02 is further configured to control the driving circuit 10 to perform an unlocking operation if it is determined that the card information transmitted by the card reading circuit 04 is verified. The control circuit 02 and the driving circuit 10 are connected by a signal line. The power supply circuit 03 in the card identification circuit 00 is also connected to the driving circuit 10 through a power line, and the power supply circuit 03 is also used for supplying power to the driving circuit 10.
It is understood that the control circuit 02 stores therein card authentication information in advance, and the card authentication information may also be a set of binary numbers. After receiving the card information transmitted by the card reading circuit 04, the control circuit 02 may compare the card information with the card verification information stored in advance. If the card information matches the card verification information, the control circuit 02 may determine that the card information passes the verification, and may control the drive circuit 10 to perform the unlocking operation.
Alternatively, after determining that the unlocking operation is completed by the driving circuit 10, the control circuit 02 may control the power circuit 03 to stop supplying power to the card reading circuit 04 again, and the card identification circuit 00 enters the sleep state again. Therefore, the power consumption of the door lock in the standby state can be effectively reduced.
The driving circuit 10 may include a motor and a clutch, among others. The control circuit 02 can control the motor to rotate, and the motor can further push the clutch on the door handle to push the clutch on the door handle into a hole on a central shaft in the lock body, so that the connection between the door handle and the central shaft of the lock body is realized. Based on this door handle can drive the lock body center pin and rotate to accomplish the operation of unblanking.
For the scenario that the card recognition circuit 00 is applied to a door lock, as shown in fig. 3, the touch sensing module 011 in the card recognition circuit 00 may include a plurality of touch keys. For example, fig. 3 shows numbers 0 to 9, and 12 touch keys of the asterisk key and the number sign key. Each touch key can detect whether a target object is approaching, and sends the detected touch sensing signal to the touch detection module 012. That is, the touch detection module 012 can receive a touch sensing signal sent by any one touch key. Alternatively, the touch key may be a square pad.
Optionally, the target object may also input the unlocking password by clicking a corresponding touch key. The touch sensing module 011 can detect a touch sensing signal based on a clicking operation of a target object and send the touch sensing signal to the touch detecting module 012. The touch detection module 012 can further determine an unlock password input by the target object based on the received touch sensing signal, and send the unlock password to the control circuit 02. The control circuit 02 stores an unlocking verification password in advance. After receiving the unlocking password input by the target object sent by the touch detection module 012, the control circuit 02 may compare the received unlocking password with the pre-stored unlocking verification password. If the unlocking password is identical to the unlocking verification password, the control circuit 02 may determine that the unlocking password passes the verification, and may control the driving circuit 10 to perform the unlocking operation.
In summary, the embodiment of the present application provides a door lock, in which a card identification circuit in the door lock can stop supplying power to a card reading circuit in a sleep state, and can supply power to the card reading circuit after detecting that a target object is approaching. From this, effectively reduced the consumption of card identification circuit, and then reduced the consumption of lock. In addition, the card reading circuit can be timely powered when a target object is determined to approach, so that the card information can be timely read, and the working reliability of the door lock can be further ensured.
It should be understood that the card identification circuit provided by the embodiment of the present application can be applied to other devices that need to read card information besides door locks. For example, the method can also be applied to an attendance card punching device or a card swiping payment device.
Fig. 5 is a flowchart of a power supply method for a card identification circuit according to an embodiment of the present application, where the method may be applied to a control circuit in the card identification circuit shown in fig. 1 or fig. 2. As can be seen from the above drawings, the card identification circuit includes a detection circuit 01, a power supply circuit 03 and a card reading circuit 04 in addition to the control circuit 02. As shown in fig. 5, the method includes:
and step 101, when the card identification circuit is in a dormant state, controlling the power supply circuit to stop supplying power to the card reading circuit.
If the detection circuit does not detect the target object within the preset time and/or the card reading circuit does not detect the sensing signal of the card within the preset time, the control circuit can control the card identification circuit to enter a dormant state. When the card identification circuit is in a dormant state, the control circuit controls the power supply circuit to stop supplying power to the card reading circuit because the card identification operation of the target object does not need to be responded.
Optionally, as shown in fig. 2, the card recognition circuit may further include a switching circuit. In step 101, the control circuit may send a first switch signal to the control terminal of the switch circuit to control the first terminal of the switch circuit to be disconnected from the second terminal of the switch circuit, so that the power circuit stops supplying power to the card reading circuit.
And 102, if the distance between the target object and the power circuit is detected to be smaller than the threshold value, controlling the power circuit to supply power to the card reading circuit.
In the embodiment of the application, the detection circuit can detect the distance between the detection circuit and the target object. If the distance to the target object is detected to be less than the threshold value, the detection circuit may determine that the target object has an incentive to use the card recognition circuit and may send an indication signal to the control circuit. After the control circuit receives the indication signal, the control circuit can determine that a target object is close to the control circuit, and then can respond to the indication signal and control the power supply circuit to supply power to the card reading circuit, so that the card reading circuit can be in a working state, and card information can be read in time.
Optionally, the detection circuit may be a touch sensing circuit. The touch sensing circuit can determine that the distance between the touch sensing circuit and the target object is smaller than a threshold value when the signal value of the sensed touch sensing signal of the target object is within the signal value range.
Optionally, as shown in fig. 2, the card recognition circuit may further include a switching circuit. In step 102, the control circuit may send a second switching signal to the control terminal of the switch circuit to control the first terminal and the second terminal of the switch circuit to be conducted, so that the power circuit supplies power to the card reading circuit.
With continuing reference to fig. 5, the power supply method provided in the embodiment of the present application may further include:
and 103, if the card information sent by the card reading circuit is not received within the target time length after the power supply circuit is controlled to supply power to the card reading circuit, controlling the power supply circuit to stop supplying power to the card reading circuit.
If the card reading circuit does not detect the card information within the target time length, the card information is not sent to the control circuit. Correspondingly, the control circuit can determine that no card is close to the card reading circuit currently, so that the power supply circuit can be controlled to stop supplying power to the card reading circuit, and the power consumption of the card identification circuit is reduced. The target time duration may be a fixed time duration pre-stored in the control circuit, for example, the target time duration may be 10 seconds or 15 seconds.
In summary, the embodiment of the present application provides a power supply method for a card identification circuit. In the method, the detection circuit in the card recognition circuit may send an indication signal to the control circuit when detecting that the distance to the target object is less than a threshold value. The control circuit can control the power supply circuit to stop supplying power to the card reading circuit in the dormant state, and can control the power supply circuit to supply power to the card reading circuit after receiving the indication signal. Because the power supply circuit does not need to continuously supply power for the card reading circuit, the power consumption of the card identification circuit is effectively reduced. And moreover, the control circuit can control the power supply circuit to supply power to the card reading circuit in time when the target object is determined to approach. Therefore, the card information can be timely read, and the working reliability of the card identification circuit is further ensured.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process of the power supply method of the card identification circuit described above may refer to the corresponding process in the foregoing card identification circuit embodiment, and is not described herein again.
An embodiment of the present application further provides a computer-readable storage medium, in which a computer program is stored, and the computer program is loaded by the control circuit and executes the power supply method of the card identification circuit provided in the foregoing embodiment, for example, the power supply method of the card identification circuit shown in fig. 5.
Embodiments of the present application further provide a computer program product including instructions, which, when the computer program product runs on a computer, causes the computer to execute the power supply method of the card identification circuit provided in the above method embodiments, for example, the power supply method of the card identification circuit shown in fig. 5.
The above description is only exemplary of the present application and should not be taken as limiting the present application, and any modifications, equivalents, improvements and the like that are made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. A card identification circuit, the card identification circuit comprising: the device comprises a detection circuit, a control circuit, a power circuit and a card reading circuit;
the detection circuit is connected with the control circuit and is used for sending an indication signal to the control circuit if the distance between the detection circuit and a target object is smaller than a threshold value;
the control circuit is also connected with the power circuit and is used for controlling the power circuit to stop supplying power to the card reading circuit when the card identification circuit is in a dormant state and controlling the power circuit to supply power to the card reading circuit after receiving the indication signal;
the card reading circuit is connected with the control circuit and is used for reading card information under the driving of the power circuit and transmitting the card information to the control circuit.
2. The card recognition circuit of claim 1, wherein the detection circuit is a touch sensing circuit;
the touch sensing circuit is used for determining that the distance between the touch sensing circuit and the target object is smaller than a threshold value if the sensed signal value of the touch sensing signal of the target object is within the signal value range.
3. The card identification circuit of claim 2, wherein the card reading circuit comprises: the card reading antenna and the information reading sub-circuit are connected with the card reading antenna;
the card reading antenna is positioned in the setting area of the touch sensing circuit and is used for transmitting a sensing signal of a card sensed by the card reading antenna to the information reading sub-circuit;
the information reading sub-circuit is further connected with the control circuit, and the information reading sub-circuit is used for reading card information of the card based on the induction signal and transmitting the card information to the control circuit.
4. The card identification circuit of any of claims 1 to 3, wherein the control circuit is further configured to:
and if the card information sent by the card reading circuit is not received within the target time length after the power supply circuit is controlled to supply power to the card reading circuit, controlling the power supply circuit to stop supplying power to the card reading circuit.
5. The card identification circuit of any of claims 1 to 3, further comprising: a switching circuit;
the first end of the switch circuit is connected with the power supply circuit, the second end of the switch circuit is connected with the card reading circuit, and the control end of the switch circuit is connected with the control circuit;
the control circuit is used for controlling the on-off state of the first end and the second end of the switch circuit.
6. A door lock, characterized in that the door lock comprises: a driver circuit and a card recognition circuit according to any one of claims 1 to 5;
the control circuit in the card identification circuit is also connected with the drive circuit, and the control circuit is also used for controlling the drive circuit to execute unlocking operation if the card information transmitted by the card reading circuit is confirmed to pass verification.
7. The power supply method of the card identification circuit is characterized in that the card identification circuit comprises a power supply circuit and a card reading circuit; the method comprises the following steps:
when the card identification circuit is in a dormant state, controlling the power supply circuit to stop supplying power to the card reading circuit;
and if the distance between the power supply circuit and the target object is detected to be smaller than the threshold value, controlling the power supply circuit to supply power to the card reading circuit.
8. The method of claim 7, wherein the detecting that the distance to the target object is less than a threshold value comprises:
and if the sensed signal value of the touch sensing signal of the target object is within the signal value range, determining that the distance between the touch sensing signal and the target object is less than a threshold value.
9. The method according to claim 7 or 8, characterized in that the method further comprises:
and if the card information sent by the card reading circuit is not received within the target time length after the power supply circuit is controlled to supply power to the card reading circuit, controlling the power supply circuit to stop supplying power to the card reading circuit.
10. The method of claim 7 or 8, wherein the card identification circuit further comprises: a first end of the switch circuit is connected with the power supply circuit, and a second end of the switch circuit is connected with the card reading circuit;
the controlling the power circuit to stop supplying power to the card reading circuit includes: controlling the first end and the second end of the switch circuit to be disconnected;
the control the power supply circuit is for the card reading circuit power supply includes: and controlling the conduction of the first end and the second end of the switch circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110900208.9A CN113627204A (en) | 2021-08-06 | 2021-08-06 | Card identification circuit, power supply method thereof and door lock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110900208.9A CN113627204A (en) | 2021-08-06 | 2021-08-06 | Card identification circuit, power supply method thereof and door lock |
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| Publication Number | Publication Date |
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| CN113627204A true CN113627204A (en) | 2021-11-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110900208.9A Pending CN113627204A (en) | 2021-08-06 | 2021-08-06 | Card identification circuit, power supply method thereof and door lock |
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| CN112435373A (en) * | 2020-11-24 | 2021-03-02 | 惠州拓邦电气技术有限公司 | Electronic lock work control method and device and electronic lock |
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| CN205302313U (en) * | 2016-01-13 | 2016-06-08 | 中国电子科技集团公司第十五研究所 | Battery powered smart card reader of economize on electricity |
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