Fingerprint acquisition system and door lock

Abstract

The utility model provides a fingerprint acquisition system and a door lock, and relates to the technical field of fingerprint identification door locks, the fingerprint acquisition system comprises a single-chip microcomputer and a fingerprint acquisition module, the signal output end of the fingerprint acquisition module is electrically connected with a first memory and a second memory, the fingerprint acquisition module acquires fingerprint information and alternately stores the fingerprint information to the first memory and the second memory, and the first memory and the second memory respectively send the fingerprint information stored in adjacent times to the comparison circuit. The first adjusting screw and the second adjusting screw are arranged and can move in the X-axis direction and the Y-axis direction to achieve movement of knobs in different forms, the knobs are not prone to being stuck when rotating, and when the output end of the motor module is connected with the gear transmission block to move, the gear transmission block can drive the knobs to rotate to achieve unlocking. Meanwhile, by recording the fingerprint information continuously collected twice, the risk of inputting different fingerprint information can be reduced, and normal opening and using of the door lock are prevented from being affected.

Description

Technical Field

[0001] The utility model relates to the technical field of fingerprint recognition door locks, in particular to a fingerprint collection system and a door lock. Background Art

[0002] As a security barrier for homes, businesses, factories or other places, the importance of smart door locks is self-evident. Compared with traditional door locks, the advantage of smart door locks is that the inner and outer lock bodies are designed independently. This design ensures that even if the outer part of the door is damaged, the inner part of the door can still play a protective role and effectively prevent illegal intrusion.

[0003] Smart door locks can be divided into fingerprint recognition door locks, face recognition door locks and voiceprint recognition door locks according to different recognition methods. Among them, fingerprint recognition door locks can enter fingerprints of different fingers to open the door lock, which has the advantage of easy use.

[0004] However, in the process of fingerprint entry, the existing fingerprint recognition door locks are unable to perform feature comparison on the fingerprint information entered adjacently. Especially when the time interval between two fingerprint entry is long, different fingerprint information is easily entered, which affects the normal opening of the door lock, resulting in the need to delete the wrong fingerprint information and re-enter, affecting the accuracy of fingerprint entry. In addition, the operation process is cumbersome and time-consuming. Utility Model Content

[0005] The purpose of the utility model is to provide a fingerprint collection system and a door lock. In the process of recording the same fingerprint, even if the time interval between two fingerprint recordings is long, the risk of recording different fingerprint information can be reduced to prevent affecting the normal opening and use of the door lock.

[0006] On one hand, to achieve the above-mentioned purpose, the utility model provides a fingerprint collection system, including a single chip computer and a fingerprint collection module, the signal output end of the fingerprint collection module is electrically connected to a first memory and a second memory, the fingerprint collection module collects fingerprint information and stores the fingerprint information alternately in the first memory and the second memory, when the first memory and the second memory respectively send the adjacent stored fingerprint information to the comparison circuit;

[0007] The input pin of the single-chip microcomputer is electrically connected to a power supply module for power supply, a key module for updating information, and a comparison circuit for comparing the difference between two consecutive stored information. The output pin of the single-chip microcomputer is connected to a display module, and the display module is used to display an information prompt that the fingerprint information entered twice is inconsistent, which can interrupt the fingerprint entry process to prevent the situation where the door lock cannot be opened after the fingerprint entry is completed.

[0008] The signal output ends of the first memory and the second memory are electrically connected to the signal input ends of the comparison circuit respectively. The first memory and the second memory respectively send the stored information to the comparison circuit for feature comparison. The comparison circuit includes a feature extraction unit and a feature comparison unit. The feature extraction unit extracts feature values ​​of the fingerprint information twice, and the feature comparison unit compares the extracted feature values, and sends the comparison result as the comparison result of the comparison circuit to the single-chip microcomputer.

[0009] As a further solution of the utility model: the power supply module includes a power supply circuit and a relay electrically connected to the power supply circuit. When the fingerprint information received by the fingerprint collection module is consistent with the pre-recorded fingerprint information, the relay is closed and the power supply module is turned on. Otherwise, the relay remains in a normally open state, so that the door lock can be opened when the fingerprint information is the same as the recorded fingerprint information, and the door lock remains in a closed state when the fingerprint information is different from the recorded fingerprint information.

[0010] As a further solution of the utility model: the button module includes an adding circuit and a deleting circuit, the adding circuit is used to increase the number of valid fingerprints of the fingerprint collection system, and the deleting circuit is used to reduce the number of valid fingerprints of the fingerprint collection system. By setting the adding circuit and the deleting circuit, the number of valid fingerprints in the door lock can be adjusted, which is convenient for opening the door lock with different fingers.

[0011] As a further solution of the utility model: the fingerprint acquisition module includes a voltage conversion circuit, a timing circuit and a fingerprint acquisition circuit, and the voltage conversion circuit is used to adjust the voltage signal received by the input end of the fingerprint acquisition module to a voltage signal adapted to the fingerprint acquisition module, so that the fingerprint acquisition module works within the rated voltage;

[0012] The timing circuit is used to record the time interval between two consecutive fingerprint collections by the fingerprint collection module. When the time interval exceeds a preset time length, the display module prompts that the last fingerprint needs to be entered again. The first memory and the second memory respectively store the fingerprint information entered last time and the fingerprint information entered again, and send the fingerprint information entered last time and the fingerprint information entered again to the comparison circuit respectively. By using the first memory and the second memory to store the fingerprint information entered last time and the fingerprint information entered again respectively, fingerprints with adjacent entry orders can always be saved.

[0013] As a further solution of the utility model: the comparison circuit compares the distinguishing features between the fingerprint information entered last time and the fingerprint information entered again, and sends the comparison result to the single-chip microcomputer; when the number of distinguishing features is greater than a set value, the single-chip microcomputer sends a control signal to the display module, and the display module prompts that the fingerprint information needs to be re-entered; when the number of distinguishing features is not greater than the set value, the single-chip microcomputer receives the comparison result sent by the comparison circuit, the single-chip microcomputer does not send a control signal to the display module, the display module does not take any action, and the fingerprint collection module continues to collect fingerprint information until the collection is completed, which can effectively reduce the risk of entering fingerprints of different fingers during the entry of the same fingerprint. The single-chip microcomputer is an STM32 single-chip microcontroller.

[0014] As a further solution of the utility model: the display module includes a display screen and / or a buzzer, the display screen is an LCD screen, the LCD screen is a liquid crystal screen, and the buzzer can give a sound prompt for the prompt information.

[0015] In the second aspect, a door lock is also provided, which adopts the fingerprint collection system as described in the above scheme, and the door lock includes a chuck module, an upper shell and a lower shell adapted to be connected to the upper shell, the upper shell and the lower shell are connected to form a cavity, the top of the upper shell is connected through a gear transmission block adapted to the chuck module, the top of the gear transmission block is movably connected to a knob, the bottom of the upper shell is detachably connected to a PCB board integrated with the fingerprint collection system, the bottom of the PCB board is fixedly connected to a motor module, the chuck module can realize the movement of knobs of different shapes by moving in the X-axis and Y-axis directions, so that the knob is not easily stuck when rotating, and when the output end of the motor module is connected to the gear transmission block to move, the gear transmission block can drive the knob to rotate to achieve unlocking.

[0016] As a further solution of the utility model: the bottom of the PCB board is electrically connected to an FPC sensor board, and the FPC sensor board is a flexible printed circuit board. The FPC sensor board can increase the wiring density, and is light in weight and thin in thickness, and can achieve good bending properties, thereby facilitating the rationalization of the internal installation space of the door lock.

[0017] As a further solution of the utility model: the bottom of the lower shell is connected to a mounting base, the side of the lower shell is connected to a battery mounting structure, and the battery mounting structure includes a battery box and a battery cover adapted to be snap-connected to one side of the battery box.

[0018] As a further solution of the utility model: the chuck module includes a first fixing screw, a first rotating disk, a second rotating disk, a first adjusting screw, a second adjusting screw, a chuck, a second fixing screw, a chuck fixing block and a movable bracket, the first fixing screw is threadedly connected to the top of the first rotating disk, the first rotating disk and the second rotating disk are fixed by the second fixing screw, the second adjusting screw fixes the chuck to the movable bracket, the number of the chucks is provided with two, and the clamping knob can be adjusted by rotating the first adjusting screw through the two chucks and the first adjusting screw to realize the anti-theft function, and the height of the knob can be adjusted by rotating the second adjusting screw.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] 1. The utility model records the fingerprint information collected twice in succession and performs feature comparison on the fingerprint information entered in adjacent times. Even if the time interval between two fingerprint entries is long during the fingerprint entry process, the risk of entering different fingerprint information can be reduced to prevent affecting the normal opening and use of the door lock. There is no need to delete the wrong fingerprint information, which effectively improves the accuracy of fingerprint entry. The operation is simple and time-saving.

[0021] 2. The utility model provides a first adjusting screw and a second adjusting screw, so that the movement of the knobs of different shapes can be realized by moving in the X-axis and Y-axis directions, so that the knobs are not easily stuck when rotating. When the output end of the motor module is connected to the gear transmission block for movement, the gear transmission block can drive the knob to rotate and realize unlocking. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a partial exploded structural diagram of the utility model;

[0023] Figure 2 This is a partial exploded structural diagram of the chuck module of the utility model;

[0024] Figure 3 A front view of the first rotating disk connection structure of the utility model;

[0025] Figure 4 A cross-sectional view of the first rotating disk connection structure of the utility model;

[0026] Figure 5 A top view of the chuck module of the utility model;

[0027] Figure 6 This is the fingerprint collection system module of the present utility model.

[0028] In the figure: 1. single chip microcomputer; 110. power module; 111. button module; 112. fingerprint collection module; 113. first memory; 114. second memory; 115. comparison circuit; 116. display module; 2. chuck module; 201. first fixing screw; 202. first rotating disk; 203. second rotating disk; 204. first adjusting screw; 205. second adjusting screw; 206. chuck; 207. second fixing screw; 208. chuck fixing block; 209. movable bracket; 3. upper shell; 4. knob; 5. PCB board; 6. motor module; 7. FPC sensor board; 8. lower shell; 9. mounting base; 10. battery box; 11. battery cover; 12. gear transmission block. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. Unless otherwise defined, the technical terms or scientific terms used herein should be understood by people with general skills in the field to which the utility model belongs. "Including" and similar words used in this article mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0030] like Figure 6 As shown, a fingerprint collection system is provided, including a single chip computer 1 and a fingerprint collection module 112, the signal output end of the fingerprint collection module 112 is electrically connected to a first memory 113 and a second memory 114, the fingerprint collection module 112 collects fingerprint information and stores the fingerprint information alternately in the first memory 113 and the second memory 114, when the first memory 113 and the second memory 114 respectively send the fingerprint information stored adjacently to the comparison circuit 113;

[0031] The input pins of the single-chip computer 1 are electrically connected to a power supply module 110 for power supply, a key module 111 for updating information, and a comparison circuit 115 for comparing the difference between two consecutive stored information. The output pins of the single-chip computer 1 are connected to a display module 116. The display module 116 is used to display a message prompt indicating that the fingerprint information entered twice at an interval is inconsistent, which can interrupt the fingerprint entry process to prevent the situation where the door lock cannot be opened after the fingerprint entry is completed.

[0032] The signal output ends of the first memory 113 and the second memory 114 are electrically connected to the signal input ends of the comparison circuit 115 respectively. The first memory 113 and the second memory 114 respectively send the stored information to the comparison circuit 115 for feature comparison. The comparison circuit 115 includes a feature extraction unit and a feature comparison unit. The feature extraction unit extracts feature values ​​of the fingerprint information twice, and the feature comparison unit compares the extracted feature values, and sends the comparison result as the comparison result of the comparison circuit 115 to the single chip computer 1.

[0033] Preferably, the power supply module 110 includes a power supply circuit and a relay electrically connected to the power supply circuit. When the fingerprint information received by the fingerprint collection module 112 is consistent with the pre-recorded fingerprint information, the relay closes and turns on the power supply module 110. Otherwise, the relay remains in a normally open state, so that the door lock can be opened when the fingerprint information is the same as the recorded fingerprint information, and remains in a closed state when the fingerprint information is different from the recorded fingerprint information.

[0034] Preferably, the button module 111 includes an adding circuit and a deleting circuit. The adding circuit is used to increase the number of valid fingerprints in the fingerprint collection system, and the deleting circuit is used to reduce the number of valid fingerprints in the fingerprint collection system. By setting the adding circuit and the deleting circuit, the number of valid fingerprints in the door lock can be adjusted to facilitate opening the door lock with different fingers.

[0035] Preferably, the fingerprint collection module 112 includes a voltage conversion circuit, a timing circuit and a fingerprint collection circuit, and the voltage conversion circuit is used to adjust the voltage signal received at the input end of the fingerprint collection module 112 to a voltage signal adapted to the fingerprint collection module 112, so that the fingerprint collection module 112 works within the rated voltage;

[0036] The timing circuit is used to record the time interval between two consecutive fingerprint collections by the fingerprint collection module 112. When the time interval exceeds the preset time length, the display module 116 prompts that the last fingerprint needs to be re-entered. The first memory 113 and the second memory 114 respectively store the fingerprint information recorded last time and the fingerprint information recorded again, and send the fingerprint information recorded last time and the fingerprint information recorded again to the comparison circuit 115 respectively. By using the first memory 113 and the second memory 114 to store the fingerprint information recorded last time and the fingerprint information recorded again respectively, fingerprints with adjacent recording orders can always be saved.

[0037] Preferably, the comparison circuit 115 compares the distinguishing features between the fingerprint information entered last time and the fingerprint information entered again, and sends the comparison result to the single chip computer 1. When the number of distinguishing features is greater than the set value, the single chip computer 1 sends a control signal to the display module 116, and the display module 116 prompts that the fingerprint information needs to be re-entered. When the number of distinguishing features is not greater than the set value, the single chip computer 1 receives the comparison result sent by the comparison circuit 115, the single chip computer 1 does not send a control signal to the display module 116, the display module 116 does not take any action, and the fingerprint collection module 112 continues to collect fingerprint information until the collection is completed, which can effectively reduce the risk of entering fingerprints of different fingers during the entry of the same fingerprint. The single chip computer 1 is an STM32 single-chip microcontroller.

[0038] Preferably, the display module 116 includes a display screen and a buzzer, the display screen is an LCD screen, the LCD screen is a liquid crystal screen, and the buzzer can give a sound prompt for the prompt information.

[0039] By recording the fingerprint information collected twice in succession and performing feature comparison on the fingerprint information entered adjacently, even if the time interval between the two fingerprint entries is long during the fingerprint entry process, the risk of entering different fingerprint information can be reduced to prevent affecting the normal opening and use of the door lock. There is no need to delete the erroneous fingerprint information, which effectively improves the accuracy of fingerprint entry. The operation is simple and time-saving.

[0040] like Figure 1-Figure 5 As shown, a door lock is also provided. The door lock adopts the fingerprint collection system of the above scheme. The door lock includes a chuck module 2, an upper shell 3 and a lower shell 8 adapted to be connected to the upper shell 3. The upper shell 3 and the lower shell 8 are connected to form a cavity. The top of the upper shell 3 is penetrated by a gear transmission block 12 adapted to the chuck module 2. The top of the gear transmission block 12 is movably connected with a knob 4. The bottom of the upper shell 3 is detachably connected to a PCB board 5 integrated with a fingerprint collection system. The bottom of the PCB board 5 is fixedly connected with a motor module 6. The chuck module 2 can realize the movement of the knob 4 in different shapes by moving in the X-axis and Y-axis directions, so that the knob 4 is not easily stuck when rotating. When the output end of the motor module 6 is connected to the gear transmission block 12 to move, the gear transmission block 12 can drive the knob 4 to rotate to achieve unlocking.

[0041] Preferably: the bottom of the PCB board 5 is electrically connected with an FPC sensor board 7, and the FPC sensor board 7 is a flexible printed circuit board. The FPC sensor board 7 can increase the wiring density, and is light in weight and thin in thickness, and can achieve good bending properties, so as to rationalize the internal installation space of the door lock.

[0042] Preferably: the bottom of the lower shell 8 is connected to a mounting base 9 , the side of the lower shell 8 is connected to a battery mounting structure, and the battery mounting structure includes a battery box 10 and a battery cover 11 adapted to be snap-fitted to one side of the battery box 10 .

[0043] Preferably: the chuck module 2 includes a first fixing screw 201, a first rotating disk 202, a second rotating disk 203, a first adjusting screw 204, a second adjusting screw 205, a chuck 206, a second fixing screw 207, a chuck fixing block 208 and a movable bracket 209, the first fixing screw 201 is threadedly connected to the top of the first rotating disk 202, the first rotating disk 202 and the second rotating disk 203 are fixed by the second fixing screw 207, the second adjusting screw 205 fixes the chuck 206 to the movable bracket 209, the number of chucks 206 is provided with two, through the two chucks 206 and the first adjusting screw 204, the clamping knob 4 can be adjusted under the condition of rotating the first adjusting screw 204 to realize the anti-theft function, and the height of the knob 4 can be adjusted by rotating the second adjusting screw 207.

[0044] Although the embodiments of the present invention are described in detail above, it is obvious to those skilled in the art that various modifications and variations can be made to these embodiments. However, it should be understood that such modifications and variations are within the scope and spirit of the present invention in the claims. Moreover, the present invention described herein may have other embodiments and may be implemented or realized in a variety of ways.

Claims

1. A fingerprint collection system, characterized in that: include: A single chip computer (1) and a fingerprint collection module (112), wherein a signal output end of the fingerprint collection module (112) is electrically connected to a first memory (113) and a second memory (114), and the fingerprint collection module (112) collects fingerprint information and stores the fingerprint information alternately in the first memory (113) and the second memory (114); The input pins of the single-chip computer (1) are electrically connected to a power supply module (110) for supplying power, a key module (111) for updating information, and a comparison circuit (115) for comparing the difference between two sequentially stored information, and the output pins of the single-chip computer (1) are connected to a display module (116); The signal output ends of the first memory (113) and the second memory (114) are respectively electrically connected to the signal input ends of the comparison circuit (115), and the first memory (113) and the second memory (114) respectively send the stored information to the comparison circuit (115) for feature comparison.

2. The fingerprint collection system according to claim 1, characterized in that: The power supply module (110) comprises a power supply circuit and a relay electrically connected to the power supply circuit; when the fingerprint information received by the fingerprint collection module (112) is consistent with the fingerprint information recorded in advance, the relay is closed and the power supply module (110) is turned on; otherwise, the relay remains in a normally open state.

3. The fingerprint collection system according to claim 1, characterized in that: The key module (111) comprises an adding circuit and a deleting circuit, the adding circuit is used to increase the number of valid fingerprints of the fingerprint collection system, and the deleting circuit is used to reduce the number of valid fingerprints of the fingerprint collection system.

4. The fingerprint collection system according to claim 1, characterized in that: The fingerprint collection module (112) comprises a voltage conversion circuit, a timing circuit and a fingerprint collection circuit, wherein the voltage conversion circuit is used to adjust a voltage signal received at an input end of the fingerprint collection module (112) to a voltage signal adapted to the fingerprint collection module (112); The timing circuit is used to record the time interval between two consecutive times when the fingerprint collection module (112) collects fingerprint information. When the time interval exceeds a preset time length, the display module (116) prompts that the last fingerprint needs to be entered again. The first memory (113) and the second memory (114) respectively store the fingerprint information entered last time and the fingerprint information entered again, and respectively send the fingerprint information entered last time and the fingerprint information entered again to the comparison circuit (115).

5. The fingerprint collection system according to claim 4, characterized in that: The comparison circuit (115) compares the distinguishing features between the fingerprint information entered last time and the fingerprint information entered again, and sends the comparison result to the single chip microcomputer (1); when the number of distinguishing features is greater than a set value, the single chip microcomputer (1) sends a control signal to the display module (116), and the display module (116) prompts that the fingerprint information needs to be re-entered; when the number of distinguishing features is not greater than the set value, the single chip microcomputer (1) receives the comparison result sent by the comparison circuit (115), the single chip microcomputer (1) does not send a control signal to the display module (116), the display module (116) does not take any action, and the fingerprint collection module (112) continues to collect fingerprint information until the collection is completed.

6. The fingerprint collection system according to claim 1, characterized in that: The display module (116) comprises a display screen and / or a buzzer, and the display screen is an LCD screen.

7. A door lock, characterized in that: The door lock adopts the fingerprint collection system according to any one of claims 1 to 6, and comprises a chuck module (2), an upper shell (3) and a lower shell (8) adapted to be connected to the upper shell (3), the upper shell (3) and the lower shell (8) being connected to form a cavity, the top of the upper shell (3) being connected through a gear transmission block (12) adapted to the chuck module (2), the top of the gear transmission block (12) being movably connected to a knob (4), the bottom of the upper shell (3) being detachably connected to a PCB board (5) integrated with the fingerprint collection system, and the bottom of the PCB board (5) being fixedly connected to a motor module (6).

8. The door lock according to claim 7, characterized in that: The bottom of the PCB board (5) is electrically connected to an FPC induction board (7), and the FPC induction board (7) is a flexible printed circuit board.

9. The door lock according to claim 8, characterized in that: The bottom of the lower shell (8) is connected to a mounting base (9), and the side of the lower shell (8) is connected to a battery mounting structure, wherein the battery mounting structure comprises a battery box (10) and a battery cover (11) adapted to be snap-connected to one side of the battery box (10).

10. The door lock according to claim 9, characterized in that: The chuck module (2) comprises a first fixing screw (201), a first rotating disk (202), a second rotating disk (203), a first adjusting screw (204), a second adjusting screw (205), a chuck (206), a second fixing screw (207), a chuck fixing block (208) and a movable bracket (209), wherein the first fixing screw (201) is threadedly connected to the top of the first rotating disk (202), the first rotating disk (202) and the second rotating disk (203) are fixed by the second fixing screw (207), and the second adjusting screw (205) fixes the chuck (206) and the movable bracket (209).

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