Encryption electric lock control circuit

Abstract

The utility model discloses an encryption electric lock control circuit, and relates to the technical field of electricity. The safety and reliability of the electric lock control circuit can be improved. According to the main technical scheme, an unlocking signal sending end coding circuit, an unlocking signal receiving end decoding circuit, a power supply module and an electronic switching circuit are included, an unlocking signal is coded and encrypted through the sending end coding circuit and then sent to a receiving end for decoding verification, and after verification is correct, the receiving end decoding circuit outputs a high level to the control end of the electronic switching circuit; and after the control end receives the high-level signal, the electronic switch is switched on, and the electric lock is unlocked. The electric lock control circuit is high in safety coefficient, green, energy-saving, excellent in performance, small in size and capable of being installed inside or outside an electric lock, and original equipment does not need to be replaced.

Description

Technical Field

[0001] The utility model relates to the technical field of electricity, in particular to an encrypted electric lock control circuit. Background Art

[0002] As people's security awareness increases, they have higher and higher requirements for the convenience and security of access control systems, especially the military, government, and confidentiality units, which attach great importance to security. Most of the existing electric locks can be unlocked by power on or power off. If the control lock circuit is cut, the power off unlocking electric lock will be opened, and if the control lock circuit is powered on, the power on unlocking electric lock will be opened. While bringing convenience to people's entry and exit, the safety factor is relatively low, especially for public area access control such as community access control, the circuit is more easily damaged, making the access control useless.

[0003] In summary, it is urgent to develop a circuit with a high safety factor to control the unlocking of electric locks through encrypted signals. Summary of the invention

[0004] In order to overcome the shortcomings of the above-mentioned technology, the utility model provides an electric lock control circuit with high safety factor, green energy saving, superior performance, compact size and can be installed inside or outside the electric lock. Even if the line controlling the lock is disconnected or powered on, the lock cannot be opened. Only the encrypted control signal is verified with the internal preset verification information. The lock can be opened only if the verification is correct, which greatly increases the safety factor of the electric lock.

[0005] The above technical purpose is achieved through the following technical solution: an encrypted electric lock control circuit, including an encoding circuit at the unlocking signal sending end, a decoding circuit at the unlocking signal receiving end, a power supply module and an electronic switch circuit.

[0006] The unlock signal sending end encoding circuit includes an encoding chip U1.

[0007] The unlocking signal receiving end decoding circuit includes a decoding chip U2.

[0008] Preferably, the power supply module is a DC power supply module.

[0009] The electronic switch circuit comprises an electronic switch.

[0010] Preferably, the electronic switch is an NMOS low-side power switch.

[0011] Preferably, the D pole of the NMOS tube is connected to the electric lock, the other end of the electric lock is connected to the positive power supply VCC, and the S pole of the NMOS tube is connected to the negative power supply GND.

[0012] The input pin of the encoding chip U1 is electrically connected to the unlocking signal, and the output pin of the encoding chip U1 is electrically connected to the input pin of the decoding chip U2.

[0013] The input pin of the decoding chip U2 is electrically connected to the output pin of the encoding chip U1 , and the output pin of the decoding chip U2 is electrically connected to the electronic switch circuit.

[0014] The output pin of the decoding chip U2 is electrically connected to the control end of the electronic switch circuit.

[0015] The switch end of the electronic switch circuit is connected in series to a circuit inside the electric lock that supplies power to the electric lock and unlocks the lock.

[0016] The output pin of the decoding chip U2 is electrically connected to the G pole of the NMOS tube in the switching circuit, a 10K resistor is added between the G pole of the NMOS tube and the power ground GND, the D pole of the NMOS tube is connected to the negative pole of the power-on unlocking terminal of the electric lock, the positive pole of the power-on unlocking terminal of the electric lock is electrically connected to the positive pole of the power supply, and the S pole of the NMOS tube is electrically connected to the power ground GND.

[0017] Compared with the prior art, the utility model provides an encrypted electric lock control circuit, which has the following beneficial effects.

[0018] 1. The utility model has a high safety factor, and the line between the access controller and the electric lock is no longer afraid of the electric lock being opened due to damage to the line.

[0019] 2. The utility model has a small circuit volume and can be embedded in our access controller and electric lock, or it can be installed inside or outside the equipment already in use, without the need to replace the original equipment.

[0020] Other advantages, objectives and features of the present invention will be described in the following description to some extent; and will be apparent to those skilled in the art based on the following examination and study to some extent; or, may be taught from the practice of the present invention.

[0021] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0023] Figure 1 A flowchart of an embodiment of the encrypted electric lock control circuit of the present application.

[0024] Figure 2 for Figure 1The circuit diagram of the encrypted electric lock control circuit is shown. Implementation

[0025] Here, exemplary embodiments will be described in detail, and examples thereof are shown in the accompanying drawings. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0026] The terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application. Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The words "first", "second" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not indicate a quantitative limit, but indicate that there is at least one. "Multiple" or "several" means two or more. Unless otherwise specified, words such as "front", "rear", "lower" and / or "upper" are only for the convenience of explanation and are not limited to one position or one spatial orientation. Words such as "include" or "comprise" mean that the elements or objects appearing in front of "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, and can include electrical connections, whether direct or indirect.

[0027] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The singular forms of "a", "said" and "the" used in this application and the appended claims are also intended to include plural forms unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0028] In this embodiment, Figure 1-Figure 2 As shown, an encrypted electric lock control circuit includes an encoding circuit at an unlocking signal sending end, a decoding circuit at an unlocking signal receiving end, a power supply module and an electronic switch circuit.

[0029] The encoding circuit at the unlocking signal sending end includes an encoding chip U1, a diode D1, a switch S1, a resistor R1 and a resistor R3. The output pin Dout of the encoding chip U1 is connected to the input pin Din of the decoding chip U2; the 18-pin VCC of the encoding chip U1 is connected to the cathode of the diode D1, the anode of the diode D1 is connected to the anode VCC of the power supply module through the switch S1, the 9-pin VSS of the encoding chip U1 is connected to the cathode GND of the power supply module, the 13-pin input of the encoding chip U1 is connected to the anode VCC of the power supply module through S1, and the 13-pin input of the encoding chip U1 is connected to the cathode GND of the power supply module through the resistor R1.

[0030] The decoding circuit at the unlocking signal receiving end includes a decoding chip U2 and a resistor R4. The input pin Din of the decoding chip U2 is connected to the output pin Dout of the encoding chip U1. The output pin 13 of the decoding chip U2 is connected to the control end of the electronic switch circuit. The pin 18 VCC of the decoding chip U2 is connected to the positive power supply VCC of the power supply module. The pin 9 VSS of the decoding chip U2 is connected to the negative power supply GND of the power supply module.

[0031] The power supply module is a +12VDC power supply module, including a positive power supply electrode VCC of the power supply module and a negative power supply electrode GND of the power supply module.

[0032] The electronic switch circuit comprises an NMOS tube Q1, a resistor R2 and a diode D2, wherein the G pole of the NMOS tube Q1 is connected to the 13 output pin of the decoding chip U2, the G pole of the NMOS tube Q1 is connected to the negative power pole GND of the power supply module through the resistor R2, the S pole of the NMOS tube Q1 is connected to the negative power pole GND of the power supply module, the D pole of the NMOS tube Q1 is connected to one end of the electric lock, the other end of the electric lock is connected to the positive power pole VC of the power supply module, the D pole of the NMOS tube Q1 is connected in parallel to the positive pole of the diode D2, and the negative pole of the diode D2 is connected to the positive power pole VCC of the power supply module.

[0033] Working principle: Pin 14 / TE of the encoding chip U1 is connected to the negative pole GND of the power supply module, and the enable terminal is pulled low to be effective. When S1 is closed, the encoding chip U1 is powered on through the diode D1 and is given to the input pin 13 of the encoding chip U1 as an unlocking signal. After encoding, the output pin Dout of the encoding chip U1 outputs the encoded and encrypted unlocking signal to the input pin Din of the decoding chip U2. After receiving the encoded and encrypted unlocking signal sent by the encoding chip U1, the decoding chip U2 decodes it and verifies it with the information preset by the decoding chip U2. After the verification is passed, the output pin 13 of the decoding chip U2 outputs a high level to the control terminal G of the NMOS tube Q1. After the G pole receives the high-level control signal, the D pole and the S pole are turned on. One end of the electric lock is connected to the positive pole VCC of the power supply module, and the other end is connected to the D pole of the NMOS tube. After the D pole and the S pole of the NMOS tube Q1 are turned on, the electric lock is powered and unlocked.

[0034] In the above scheme, the encoding chip U1 and the decoding chip U2 can be paired codec chips such as PT2262, PT2272, etc., or MCU and codec chips can be used in pairs, or MCU can be used for both encoding and decoding, fixed codec chips can be used, or rolling codec chips can be used; the electronic switch can be an NMOS tube, a PMOS tube or a relay, etc.

[0035] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the application disclosed herein. The present application is intended to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0036] It should be understood that the present application is not limited to the precise structure described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof, but they are protected by patent law as long as they are within the scope of the claims of the utility model.

Claims

1. An encrypted electric lock control circuit, characterized in that It includes an encoding circuit at the unlocking signal sending end, a decoding circuit at the unlocking signal receiving end, a power supply module and an electronic switch circuit.

2. The encrypted electric lock control circuit according to claim 1 is characterized in that The encoding circuit includes an encoding chip U1.

3. The encrypted electric lock control circuit according to claim 1 is characterized in that The decoding circuit includes a decoding chip U2.

4. The encrypted electric lock control circuit according to claim 1 is characterized in that The power supply module is a DC power supply module, including a positive power supply electrode VCC and a negative power supply electrode GND.

5. The encrypted electric lock control circuit according to claim 1 is characterized in that The electronic switch circuit includes an NMOS tube Q1 and a resistor R1.

6. The encrypted electric lock control circuit according to claim 2 is characterized in that The I / O input pin of the encoding chip U1 is electrically connected to the unlocking signal, the VCC of the encoding chip U1 is electrically connected to the positive power supply VCC of the power supply module, and the GND of the encoding chip U1 is electrically connected to the negative power supply GND of the power supply module.

7. The encrypted electric lock control circuit according to claim 3 is characterized in that The I / O input pin of the decoding chip U2 is electrically connected to the I / O output pin of the encoding chip U1, the I / O output pin of the decoding chip U2 is electrically connected to the G pole of the NMOS tube of the electronic switching circuit, the VCC of the decoding chip U2 is electrically connected to the positive pole VCC of the power supply module, and the GND of the decoding chip U2 is electrically connected to the negative pole GND of the power supply module.

8. The encrypted electric lock control circuit according to claim 5 is characterized in that The G pole of the NMOS tube Q1 of the electronic switch circuit is electrically connected to the I / O output pin of U2, one end of the resistor R1 is electrically connected to the G pole of the NMOS tube and the other end is connected to the negative power supply GND, the D pole of the NMOS tube is electrically connected to the electric lock, and the other end of the electric lock is connected to the positive power supply VCC.

9. The encrypted electric lock control circuit according to claim 5 is characterized in that A diode VD2 is added between the D pole of the NMOS tube of the electronic switch circuit and the positive pole VCC of the power supply.

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