Electric control lock system

Abstract

An embodiment of the utility model discloses an electric control lock system which comprises an access control all-in-one machine, a lock control module and an electric lock, a first POWERBUS unit of the access control all-in-one machine is connected with a second POWERBUS unit of the lock control module through a POWERBUS bus, and the lock control module is arranged outside the access control all-in-one machine, so that the lock control module and the electric lock can be installed in a door or even integrated in the electric lock. The access control all-in-one machine only transmits a door opening instruction to the MCU through the POWERBUS after verification is passed, a relay in the lock control module cannot be controlled to be closed and unlocked even if the access control all-in-one machine is disassembled, the safety performance of the electric control lock is improved, power supply and signal transmission can be achieved through the POWERBUS, cables used for system wiring are few, and the cost is low. Remote signal transmission can be achieved, cables do not need to be independently arranged for power supply and data transmission, wiring is simple, construction difficulty is reduced, and therefore cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of locks, and in particular to an electric-controlled lock system. Background Art

[0002] Electric locks are widely used in door control because they can be opened after verifying fingerprints, passwords, faces and other data through the access control machine. Usually, an access control machine is set outside the door, and the electric lock is controlled by the access control machine to open the door.

[0003] like Figure 1 The figure shows a schematic diagram of an existing access control machine controlling an electric lock. The access control machine is provided with a relay for controlling the lock. The COM terminal of relay K is connected to the positive pole of the power supply, the NO terminal of the relay is connected to the positive pole of the lock, and the negative pole of the power supply is connected to the negative pole of the lock. When relay K is disconnected, no electrical circuit can be formed, and the lock is in a closed state without power. When the access control machine verifies the fingerprint, password, face and other data and needs to unlock, the COM and NO terminals of the control relay K are closed to form an electrical circuit, and the lock is powered on and opened.

[0004] use Figure 1 In the technology shown, since the access control integrated machine is installed outside the door, if an illegal person dismantles the access control integrated machine and short-circuits the COM and NO terminals of relay K, the electric lock can be opened, which has poor security performance.

[0005] like Figure 2 As shown, although there are electric locks controlled by RS485 on the market, which set the relay in the indoor lock control circuit, although the safety performance of the electric lock is improved, RS485 requires the use of 4 cables (2 power lines and 2 signal lines), and when the RS485 line is too long, it is also necessary to increase the terminal matching resistance.

[0006] Therefore, existing electric lock systems have problems such as insufficient safety performance, or the use of too many cables makes installation complicated and leads to high costs. Utility Model Content

[0007] The utility model provides an electric control lock system to solve the problems of insufficient safety performance of the electric control lock system and increased cost caused by excessive use of cables.

[0008] The embodiment of the utility model provides an electric control lock system, comprising an access control integrated machine, a lock control module and an electric lock;

[0009] The access control integrated machine includes a first POWERBUS unit;

[0010] The lock control module includes a second POWERBUS unit, an MCU and a relay. The second POWERBUS unit is connected to the first POWERBUS unit through a POWERBUS bus. The signal output end of the second POWERBUS unit is connected to the MCU. The power supply end of the second POWERBUS unit is connected to the power supply access end of the relay. The control end of the MCU is connected to the control end of the relay. The power output end of the relay is connected to the positive input end of the electric lock, and the negative input end of the electric lock is grounded to the ground end of the second POWERBUS unit.

[0011] Optionally, the second POWERBUS unit includes a communication circuit, a signal transceiver circuit, a signal processing chip and an MCU power supply circuit. The input end of the communication circuit is connected to the first POWERBUS unit through the POWERBUS bus, and the output end of the communication circuit is respectively connected to the positive input end of the electric lock, the signal transceiver circuit and the input end of the MCU power supply circuit. The signal transceiver circuit is also connected to the MCU, the MCU power supply circuit supplies power to the MCU, and the signal processing chip is connected to the MCU through a signal port.

[0012] Optionally, the communication circuit includes a power input port, a TVS tube and a rectifier bridge, the power input port is connected to the POWERBUS bus, one end of the TVS tube is connected to one port of the power input port, and the other end of the TVS tube is connected to the other port of the power input port, and the two ends of the TVS tube are respectively connected to the two AC input ends of the rectifier bridge, the DC negative output end of the rectifier bridge is grounded, and the DC positive output end of the rectifier bridge serves as the output end of the communication circuit.

[0013] Optionally, the output end of the communication circuit is connected to the positive input end of the electric lock, the signal transceiver circuit and the input end of the MCU power supply circuit through diodes respectively.

[0014] Optionally, the output end of the communication circuit is further grounded via a filter capacitor.

[0015] Optionally, the signal transceiver circuit includes a signal receiving circuit and a signal sending circuit, the signal receiving circuit includes a first resistor and a second resistor connected in series, one end of the first resistor and the second resistor connected in series is connected to the output end of the communication circuit and the other end is grounded, the common end of the first resistor and the second resistor is connected to the signal receiving port of the signal processing chip, the signal sending circuit includes a first transistor, a third resistor and a fourth resistor, the collector of the first transistor is connected to the output end of the communication circuit, the emitter of the first transistor is grounded through the third resistor, and the base of the first transistor is connected to the signal sending port of the signal processing chip through the fourth resistor.

[0016] Optionally, the MCU power supply circuit includes a DC buck chip, the input end of the DC buck chip is connected to the output end of the communication circuit, and the output end of the DC buck chip is connected to the input end of the MCU.

[0017] Optionally, the signal processing chip is a PB331 communication chip.

[0018] Optionally, a relay driving circuit is further included, and the control end of the MCU is connected to the control end of the relay through the relay driving circuit.

[0019] Optionally, the relay drive circuit includes a second transistor, the base of the second transistor is connected to the control end of the MCU, the collector of the second transistor is connected to the control end of the relay, and the emitter of the second transistor is grounded.

[0020] In the electric lock system of the present invention, the first POWERBUS unit of the access control integrated machine and the second POWERBUS unit of the lock control module are connected through the POWERBUS bus, and the lock control module is arranged outside the access control integrated machine, so that the lock control module can be installed inside the door with the electric lock, or even integrated into the electric lock. After the access control integrated machine is verified, the door opening instruction is transmitted to the MCU through the POWERBUS bus. Even if the access control integrated machine is disassembled, the relay in the lock control module cannot be controlled to close and unlock, thereby improving the safety performance of the electric lock. In addition, the POWERBUS bus can be used for both power supply and signal transmission. The system wiring uses fewer cables and can realize long-distance signal transmission. There is no need to arrange cables separately for power supply and data transmission. The wiring is simple, the construction difficulty is reduced, and the cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the lock control module integrated into the access control machine in the prior art;

[0022] Figure 2 Schematic diagram of an electric lock using RS485 in the prior art;

[0023] Figure 3 A schematic diagram of an electric lock system according to an embodiment of the present invention;

[0024] Figure 4 This is a circuit diagram of the first POWERBUS unit according to an embodiment of the present invention;

[0025] Figure 5 This is a circuit schematic diagram of the MCU power supply circuit in an embodiment of the present utility model;

[0026] Figure 6 This is a circuit diagram of the MCU driving the electric lock in an embodiment of the utility model. DETAILED DESCRIPTION

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0028] Figure 3 A schematic diagram of an electric lock system provided by an embodiment of the present utility model is shown as follows: Figure 3 As shown, the electric lock system of the embodiment of the present invention includes an access control integrated machine 1, a lock control module 2 and an electric lock 3, wherein the access control integrated machine 1 can be a device for collecting at least one biometric feature and / or password number, radio frequency card information such as fingerprint, face, iris, voiceprint, palmprint, etc., and the electric lock 3 can usually be set outside the door where the electric lock 3 is installed. The electric lock 3 can be a lock controlled by an electrical signal. The electric lock 3 opens when power is received and closes when power is lost. The lock control module 2 can be a circuit set inside the door or in the electric lock 3 to supply power to or stop powering the electric lock 3. The access control integrated machine 1 can output an unlocking signal to the lock control module 2 when the biometric feature or password number is verified.

[0029] like Figure 3As shown, the access control integrated machine 1 includes a first POWERBUS unit. Of course, the access control integrated machine 1 can also include a biometric collection module and a password digital module. The lock control module 2 includes a second POWERBUS unit 21, an MCU and a relay K. The second POWERBUS unit 21 is connected to the first POWERBUS unit through a POWERBUS bus. The signal output end (TX, RX) of the second POWERBUS unit 21 is connected to the MCU, the power supply end of the second POWERBUS unit 21 is connected to the power supply access end of the relay K, the control end of the MCU is connected to the control end of the relay K, the power output end of the relay K is connected to the positive input end of the electric lock 3, and the negative input end of the electric lock 3 is grounded to the ground end of the second POWERBUS unit 21.

[0030] Among them, the POWERBUS bus is a DC carrier power supply bus. The POWERBUS bus combines the power supply line and the signal line into one, realizing that the signal and power supply share one bus. It has the advantages of non-polarity wiring, arbitrary topology, no isolation required, and long communication distance. It supports a maximum power supply voltage of 48V, a maximum communication distance of 3000m, supports 9600bps, 2400dps half-duplex communication, and supports up to 256 slave units.

[0031] In this embodiment, the first POWERBUS unit and the second POWERBUS unit 21 may be a circuit for demodulating a data signal from the POWERBUS bus and a circuit for modulating a data signal and then outputting it to the POWERBUS bus.

[0032] like Figure 4 、 Figure 5 as well as Figure 6 As shown, in one embodiment, the second POWERBUS unit 21 includes a communication circuit 210, a signal transceiver circuit 211, a signal processing chip U1 (which can be a PB331 type communication chip) and an MCU power supply circuit 212, wherein the input end of the communication circuit 210 is connected to the first POWERBUS unit through the POWERBUS bus, and the output end DC-12V of the communication circuit 210 is respectively connected to the positive input end of the electric lock 3, the signal transceiver circuit 211 and the input end of the MCU power supply circuit 212, the signal transceiver circuit 211 is also connected to the MCU, the MCU power supply circuit 212 supplies power to the MCU, and the signal processing chip PB331 is connected to the MCU through signal ports (TX, RX).

[0033] Specifically, the communication circuit 210 includes a power input port J11, a TVS tube and a rectifier bridge D20. The power input port J11 is connected to the POWERBUS bus, one end of the TVS tube is connected to a port (port 1) of the power input port J11, and the other end of the TVS tube is connected to another port (port 2) of the power input port J11. The two ends of the TVS tube are respectively connected to the two AC input ends of the rectifier bridge D20. The DC negative output end of the rectifier bridge D20 is grounded, and the DC positive output end of the rectifier bridge D20 serves as the output end DC-12V of the communication circuit 210. In an optional embodiment, the output end DC-12V of the communication circuit 210 also has a diode D19 and is grounded through a filter capacitor C31. The rectifier bridge D20 can make the power input port J11 and the POWERBUS bus non-polarity connected, reducing the complexity of the connection between the lock control module 2 and the POWERBUS bus. In addition, by providing the diode D19 and the filter capacitor C31, on the one hand, the filter capacitor C31 can improve the stable and high-quality DC voltage for the electric lock 3, MCU, etc., and the diode D19 can prevent the signal of the subsequent circuit from being connected to the POWERBUS bus, thereby ensuring the reliability of data transmission through the POWERBUS bus.

[0034] like Figure 4As shown, the signal transceiver circuit 211 includes a signal receiving circuit and a signal sending circuit. The signal receiving circuit includes a resistor R68 and a resistor R73 connected in series. One end of the series-connected resistor R68 and the resistor R73 is connected to the output terminal DC-12V of the communication circuit 210 and the other end is grounded. The common end of the resistor R68 and the resistor R73 is connected to the signal receiving port PI of the signal processing chip PB331. The signal sending circuit includes a transistor Q25, a resistor R72, and a resistor R75. The collector of the transistor Q25 is connected to the output terminal DC-12V of the communication circuit 210, and the emitter of the transistor Q25 is grounded through a resistor R74. The base of 25 is connected to the signal transmission port PO of the signal processing chip U1 through resistor 72. That is, when the first POWERBUS unit of the access control integrated device 1 transmits an unlock signal to the second POWERBUS unit via the POWERBUS bus, the power input port J11 of the communication circuit in the second POWERBUS unit receives the unlock signal. The unlock signal is collected through the series resistors R68 and R73 and transmitted to the signal receiving port PI of the signal processing chip U1. After receiving the unlock signal, the signal processing chip U1 demodulates the signal and sends it to the MCU via port RX. The MCU controls the relay to close and unlock. When the signal processing chip U1 receives a signal from the MCU via port TX, it modulates the signal and controls the transistor Q25 via the signal transmission port PO according to the modulated signal, so that the modulated signal can be loaded onto the POWERBUS bus through the communication circuit 210 and fed back to the access control integrated device 1.

[0035] like Figure 5 FIG. 2 is a schematic diagram of the MCU power supply circuit 212. Figure 5 The MCU power supply circuit 212 includes a DC step-down chip U2 and several filter capacitors (C39, C40, C41, C42). The input end of the DC step-down chip U2 is connected to the output end DC-12V of the communication circuit, and the output end DC-3.3V of the DC step-down chip U2 is connected to the input end of the MCU. It should be noted that in addition to powering the MCU, the MCU power supply circuit 212 can also power other components in the system, such as the signal processing chip U1.

[0036] like Figure 6 As shown, the lock control module 2 also includes a relay drive circuit, and the control end of the MCU is connected to the control end of the relay K through the relay drive circuit, as shown in FIG. Figure 6 As shown, the relay drive circuit includes a transistor Q26, the base of the transistor Q26 is connected to the control terminal of the MCU through a resistor R77, the collector of the transistor Q26 is connected to the output terminal DC-12V of the communication circuit 210 through a diode D22, and is connected to the control terminal of the relay K, and the emitter of the transistor Q26 is grounded. Figure 6In the figure, port J12 is connected to the electric lock 3, one end of the coil M in the relay K is connected to the output terminal DC-12V of the communication circuit 210, and the other end is connected to the collector of the transistor Q26 in the relay drive circuit as the control end of the relay K. When the MCU receives the unlocking signal from the signal processing chip PB331 from the port TX, the MCU outputs a high-level signal to drive the transistor Q26 to turn on, so that the coil M of the relay K is energized, the relay K is closed, and the electric lock 3 is powered through the port J12, and the electric lock 3 is unlocked.

[0037] In an optional embodiment, the relay drive circuit also includes a light-emitting diode D23, one end of which is connected to the control end of the MCU through an electronic device R79, and the other end is grounded, so that the control end of the MCU outputs a drive signal to control the relay K to close and unlock, and the light-emitting diode D23 is lit when the lock is unlocked, thereby providing an unlock indication.

[0038] In the electric lock system of the present invention, the first POWERBUS unit of the access control integrated machine and the second POWERBUS unit of the lock control module are connected through the POWERBUS bus, and the lock control module is arranged outside the access control integrated machine, so that the lock control module can be installed inside the door with the electric lock, or even integrated into the electric lock. After the access control integrated machine is verified, the door opening instruction is transmitted to the MCU through the POWERBUS bus. Even if the access control integrated machine is disassembled, the relay in the lock control module cannot be controlled to close and unlock, thereby improving the safety performance of the electric lock. In addition, the POWERBUS bus can be used for both power supply and signal transmission. The system wiring uses fewer cables and can realize long-distance signal transmission. There is no need to arrange cables separately for power supply and data transmission. The wiring is simple, the construction difficulty is reduced, and the cost is reduced.

[0039] The above are merely preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions are readily apparent to those skilled in the art without departing from the scope of the present invention. Therefore, while the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include other equivalent embodiments without departing from the spirit of the present invention. The scope of the present invention is determined by the appended claims.

Claims

1. An electric lock system, characterized in that: Including access control machine, lock control module and electric lock; The access control integrated machine includes a first POWERBUS unit; The lock control module includes a second POWERBUS unit, an MCU and a relay. The second POWERBUS unit is connected to the first POWERBUS unit through a POWERBUS bus. The signal output end of the second POWERBUS unit is connected to the MCU. The power supply end of the second POWERBUS unit is connected to the power supply access end of the relay. The control end of the MCU is connected to the control end of the relay. The power output end of the relay is connected to the positive input end of the electric lock, and the negative input end of the electric lock is grounded to the ground end of the second POWERBUS unit.

2. The electric lock system according to claim 1, characterized in that: The second POWERBUS unit includes a communication circuit, a signal transceiver circuit, a signal processing chip and an MCU power supply circuit. The input end of the communication circuit is connected to the first POWERBUS unit through the POWERBUS bus, and the output end of the communication circuit is respectively connected to the positive input end of the electric lock, the signal transceiver circuit and the input end of the MCU power supply circuit. The signal transceiver circuit is also connected to the MCU, the MCU power supply circuit supplies power to the MCU, and the signal processing chip is connected to the MCU through a signal port.

3. The electric lock system according to claim 2, characterized in that: The communication circuit includes a power input port, a TVS tube and a rectifier bridge. The power input port is connected to the POWERBUS bus, one end of the TVS tube is connected to one port of the power input port, and the other end of the TVS tube is connected to the other port of the power input port. The two ends of the TVS tube are respectively connected to the two AC input ends of the rectifier bridge. The DC negative output end of the rectifier bridge is grounded, and the DC positive output end of the rectifier bridge serves as the output end of the communication circuit.

4. The electric lock system according to claim 3, characterized in that: The output end of the communication circuit is connected to the positive input end of the electric lock, the signal transceiver circuit and the input end of the MCU power supply circuit respectively through a diode.

5. The electric lock system according to claim 4, characterized in that: The output end of the communication circuit is also grounded via a filter capacitor.

6. The electric lock system according to claim 2, characterized in that: The signal transceiver circuit includes a signal receiving circuit and a signal sending circuit. The signal receiving circuit includes a first resistor and a second resistor connected in series. One end of the first resistor and the second resistor connected in series is connected to the output end of the communication circuit and the other end is grounded. The common end of the first resistor and the second resistor is connected to the signal receiving port of the signal processing chip. The signal sending circuit includes a first transistor, a third resistor and a fourth resistor. The collector of the first transistor is connected to the output end of the communication circuit, the emitter of the first transistor is grounded through the third resistor, and the base of the first transistor is connected to the signal sending port of the signal processing chip through the fourth resistor.

7. The electric lock system according to claim 2, characterized in that: The MCU power supply circuit includes a DC buck chip, the input end of the DC buck chip is connected to the output end of the communication circuit, and the output end of the DC buck chip is connected to the input end of the MCU.

8. The electric lock system according to any one of claims 2 to 7, characterized in that: The signal processing chip is a PB331 communication chip.

9. The electric lock system according to any one of claims 1 to 7, characterized in that: It also includes a relay drive circuit, and the control end of the MCU is connected to the control end of the relay through the relay drive circuit.

10. The electric lock system according to claim 9, characterized in that: The relay driving circuit includes a second transistor, a base of the second transistor is connected to the control end of the MCU, a collector of the second transistor is connected to the control end of the relay, and an emitter of the second transistor is grounded.

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