Dual-signal output control circuit of fingerprint cipherer

Abstract

The utility model relates to a dual-signal output control circuit of a fingerprint cipherer, which comprises a power supply circuit, a main control circuit, a driving circuit, a binding post J2, a wireless transmitting circuit, a doorbell switch S and the fingerprint cipherer. A wired control signal output end of the main control circuit is electrically connected with a control signal input end of the driving circuit; the control signal output end of the driving circuit is electrically connected with the third, fourth and fifth binding posts of the binding post J2 respectively, the third, fourth and fifth binding posts of the binding post J2 are electrically connected with the corresponding input ends of the access control power supply respectively, and the two detection signal input circuits of the main control circuit are electrically connected with the seventh and eighth binding posts of the binding post J2 respectively. The doorbell switch S is electrically connected between the No.7 wiring terminal and the No.8 wiring terminal of the wiring terminal J2, the wireless signal output end of the main control circuit is electrically connected with the signal input end of the wireless transmitting circuit, and the output end of the wireless transmitting circuit is wirelessly connected with the fingerprint cipherer. According to the utility model, the main control circuit is electrically connected with the driving circuit and the wireless transmitting circuit respectively, so that dual signal output is realized, the wiring number is greatly reduced, the wiring error probability is reduced, the stability of the whole circuit is improved, and the experience feeling of a product is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic circuits, in particular to a fingerprint cipher dual signal output control circuit. Background Art

[0002] In the prior art, six wires need to be connected between the access control power supply of the access control system and the terminal panel machine below, including positive power supply, negative power supply, ground, switch positive, switch negative and doorbell. However, not all customers are professionals when wiring, so sometimes the wires are connected incorrectly, insufficiently, or the wire core is broken, resulting in the equipment not being able to work properly, and in severe cases, the equipment will be burned out. This has brought considerable pressure to the after-sales service of the access control system, and also brought a bad product experience to customers. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a fingerprint cipher dual signal output control circuit in view of the above-mentioned deficiencies in the prior art.

[0004] The utility model solves the above-mentioned technical problem with the following technical solution: a fingerprint cipher dual signal output control circuit, comprising a power supply circuit, a main control circuit, a drive circuit, a terminal J2, a wireless transmission circuit, a doorbell switch S and a fingerprint cipher, wherein the wired control signal output end of the main control circuit is electrically connected to the control signal input end of the drive circuit, the control signal output end of the drive circuit is electrically connected to the No. 3, 4 and 5 terminals of the terminal J2 respectively, the No. 3, 4 and 5 terminals of the terminal J2 are electrically connected to the input ends corresponding to the power supply of the access control magnetic lock respectively, the two-way detection signal input circuit of the main control circuit is electrically connected to the No. 7 and No. 8 terminals of the terminal J2 respectively, the doorbell switch S is electrically connected between the No. 7 and No. 8 terminals of the terminal J2, the wireless signal output end of the main control circuit is electrically connected to the signal input end of the wireless transmission circuit, and the output end of the wireless transmission circuit is wirelessly connected to the fingerprint cipher.

[0005] The beneficial effect of the utility model is that the dual signal output control circuit of the fingerprint encryptor of the utility model is electrically connected to the driving circuit and the wireless transmission circuit respectively through the main control circuit to realize dual signal output, which greatly reduces the number of wiring, reduces the probability of wiring errors, increases the stability of the overall circuit, and enhances the product experience.

[0006] On the basis of the above technical solution, the present invention can also be improved as follows:

[0007] Further: the power supply circuit includes a voltage conversion chip U5, a diode D1, a capacitor C5, a capacitor C15 and a capacitor C6, the positive electrode of the diode D1 is connected to an external 12V voltage, the negative electrode of the diode D1 is electrically connected to the input end of the voltage conversion chip U5, the negative electrode of the diode D1 is grounded through the capacitor C5, the grounding end of the voltage conversion chip U5 is grounded, the capacitor C5 and the capacitor C15 are connected in parallel between the output end of the voltage conversion chip U5 and the ground, and the output end of the voltage conversion chip U5 is electrically connected to the power input end of the drive circuit.

[0008] The beneficial effect of the above further scheme is: the positive and negative poles of the input power supply are reversed through the diode D1, the capacitor C5 is a high-frequency filter capacitor, the voltage conversion chip U5 converts the input 12V voltage into a 3.3V voltage for the chip to work, the capacitor C15 is an output low-frequency filter capacitor, and the capacitor C6 is an output high-frequency filter capacitor.

[0009] Further: the voltage conversion chip U5 adopts a voltage stabilizing chip of model ME6211.

[0010] Further: the drive circuit includes a capacitor C3, a diode D2, a relay AJ1, a resistor R26 and a transistor Q1, the positive electrode of the diode D1 is grounded through the capacitor C3, the positive electrode of the diode D2 is electrically connected to the collector of the diode D2 and the negative electrode of the relay AJ1 respectively, the emitter of the transistor Q1 is grounded, the base of the transistor Q1 is electrically connected to the control signal output end of the main control circuit through the resistor R26, the negative electrode of the diode D2 and the positive electrode of the relay AJ1 are electrically connected to the output end of the power supply circuit respectively, the normally open contact and the normally closed contact of the relay AJ1 are electrically connected to the No. 3 terminal and the No. 5 terminal of the terminal J2 respectively, and the common end of the relay AJ1 is electrically connected to the No. 4 terminal of the terminal J2.

[0011] The beneficial effect of the above further scheme is: the main control circuit outputs the door opening signal to the base of the transistor Q1, and drives the relay AJ1 to be on and off through the on and off of the transistor Q1, and the terminal J2 is connected to the access control power supply, thereby indirectly controlling the magnetic lock switch of the access control system. The resistor R26 plays a current limiting role to prevent the current of the switching action of the transistor Q1 from being too large to damage the components of the main control circuit. The transistor Q1 provides driving current for the relay AJ1. The capacitor C3 and the diode D2 are the absorption circuit when the relay AJ1 is working, preventing various interferences when the relay AJ1 is powered on.

[0012] Further: the wireless transmission circuit includes an inductor L3, a capacitor C31, a capacitor C32, an inductor L4, a transmitting chip U3, a crystal oscillator Y2 and a resistor R80, the power input end of the transmitting chip U3 is electrically connected to the output end of the power circuit, the signal input end of the transmitting chip U3 is electrically connected to the signal output end of the main control circuit, the signal input end of the transmitting chip U3 is grounded through the resistor R80, the constant signal input end of the transmitting chip U3 is grounded through the crystal oscillator Y2, the ground end of the transmitting chip U3 is grounded, the signal output end of the transmitting chip U3 is electrically connected to the output end of the power circuit through the inductor L4, the capacitor C32, the inductor L3 and the capacitor C31 are connected in series between the signal output end of the transmitting chip U3 and the ground, and the common end of the inductor L3 and the capacitor C31 is electrically connected to the fingerprint encryptor.

[0013] The beneficial effect of the above further scheme is: the main control circuit sends the door opening signal to the transmitting chip U3, and the transmitting chip U3 sends the received signal to the fingerprint encoder wirelessly, the crystal oscillator Y2 provides a clock signal for the transmitting chip U3, and the inductor L4, the capacitor C32, the inductor L3 and the capacitor C31 form an antenna network for signal transmission.

[0014] Further: the transmitting chip U3 adopts a transmitting chip of model F4455B. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of a dual signal output control circuit of a fingerprint cipher according to an embodiment of the present invention. DETAILED DESCRIPTION

[0016] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0017] like Figure 1As shown, a dual signal output control circuit of a fingerprint encryptor includes a power supply circuit, a main control circuit, a drive circuit, a terminal J2, a wireless transmission circuit, a doorbell switch S and a fingerprint encryptor, wherein the wired control signal output end of the main control circuit is electrically connected to the control signal input end of the drive circuit, the control signal output end of the drive circuit is electrically connected to the No. 3, 4, and 5 terminals of the terminal J2, respectively, the No. 3, 4, and 5 terminals of the terminal J2 are electrically connected to the input ends corresponding to the power supply of the access control magnetic lock, the two-way detection signal input circuit of the main control circuit is electrically connected to the No. 7 and No. 8 terminals of the terminal J2, the doorbell switch S is electrically connected between the No. 7 and No. 8 terminals of the terminal J2, the wireless signal output end of the main control circuit is electrically connected to the signal input end of the wireless transmission circuit, and the output end of the wireless transmission circuit is wirelessly connected to the fingerprint encryptor.

[0018] The dual signal output control circuit of the fingerprint cipher of the utility model is electrically connected to the driving circuit and the wireless transmission circuit respectively through the main control circuit to realize dual signal output, which greatly reduces the number of wiring, reduces the probability of wiring errors, increases the stability of the overall circuit, and enhances the product experience.

[0019] In one or more embodiments of the utility model, the power supply circuit includes a voltage conversion chip U5, a diode D1, a capacitor C5, a capacitor C15 and a capacitor C6, the positive electrode of the diode D1 is connected to an external 12V voltage, the negative electrode of the diode D1 is electrically connected to the input end of the voltage conversion chip U5, the negative electrode of the diode D1 is grounded through the capacitor C5, the grounding end of the voltage conversion chip U5 is grounded, the capacitor C5 and the capacitor C15 are connected in parallel between the output end of the voltage conversion chip U5 and the ground, and the output end of the voltage conversion chip U5 is electrically connected to the power input end of the drive circuit. The positive and negative poles of the input power supply are reversed through the diode D1, the capacitor C5 is a high-frequency filter capacitor, the voltage conversion chip U5 converts the input 12V voltage into a 3.3V voltage for chip operation, the capacitor C15 is an output low-frequency filter capacitor, and the capacitor C6 is an output high-frequency filter capacitor.

[0020] Optionally, in one or more embodiments of the present invention, the voltage conversion chip U5 is a voltage stabilizing chip of model ME6211.

[0021] In one or more embodiments of the utility model, the drive circuit includes a capacitor C3, a diode D2, a relay AJ1, a resistor R26 and a transistor Q1, the positive electrode of the diode D1 is grounded through the capacitor C3, the positive electrode of the diode D2 is electrically connected to the collector of the diode D2 and the negative electrode of the relay AJ1 respectively, the emitter of the transistor Q1 is grounded, the base of the transistor Q1 is electrically connected to the control signal output end of the main control circuit through the resistor R26, the negative electrode of the diode D2 and the positive electrode of the relay AJ1 are electrically connected to the output end of the power supply circuit respectively, the normally open contact and the normally closed contact of the relay AJ1 are electrically connected to the No. 3 terminal and the No. 5 terminal of the terminal J2 respectively, and the common end of the relay AJ1 is electrically connected to the No. 4 terminal of the terminal J2. The main control circuit outputs the door opening signal to the base of the transistor Q1, and drives the on and off of the relay AJ1 through the on and off of the transistor Q1, and the terminal J2 is connected to the access control power supply, thereby indirectly controlling the magnetic lock switch of the access control system. The resistor R26 plays a current limiting role to prevent the current of the switching action of the transistor Q1 from being too large to damage the components of the main control circuit. The transistor Q1 provides driving current for the relay AJ1. The capacitor C3 and the diode D2 are the absorption circuit when the relay AJ1 is working, preventing various interferences when the relay AJ1 is powered on.

[0022] In one or more embodiments of the utility model, the wireless transmission circuit includes an inductor L3, a capacitor C31, a capacitor C32, an inductor L4, a transmitting chip U3, a crystal oscillator Y2 and a resistor R80, the power input end of the transmitting chip U3 is electrically connected to the output end of the power circuit, the signal input end of the transmitting chip U3 is electrically connected to the signal output end of the main control circuit, the signal input end of the transmitting chip U3 is grounded through the resistor R80, the constant signal input end of the transmitting chip U3 is grounded through the crystal oscillator Y2, the ground end of the transmitting chip U3 is grounded, the signal output end of the transmitting chip U3 is electrically connected to the output end of the power circuit through the inductor L4, the capacitor C32, the inductor L3 and the capacitor C31 are connected in series between the signal output end of the transmitting chip U3 and the ground, and the common end of the inductor L3 and the capacitor C31 is electrically connected to the fingerprint encryptor. The main control circuit sends the door opening signal to the transmitting chip U3, and the transmitting chip U3 sends the received signal to the fingerprint encryptor wirelessly. The crystal oscillator Y2 provides a clock signal for the transmitting chip U3. The inductor L4, the capacitor C32, the inductor L3 and the capacitor C31 form an antenna network for signal transmission.

[0023] In one or more embodiments of the present invention, the transmitting chip U3 adopts a transmitting chip of model F4455B, and the main control circuit adopts a single chip microcomputer of model SC95F8617P48R.

[0024] The working principle of the dual signal output control circuit of the fingerprint cipher of the utility model is:

[0025] When a password is entered or a card is swiped on the access control panel, the access control panel generates a door opening signal and sends it wirelessly to the main control circuit through the wireless transmission circuit. The main control circuit determines whether the user has the authority based on the password or the ID of the access control card. If the user has the authority, a drive signal is generated and output to the drive circuit. The drive circuit controls the on-off of relay AJ according to the drive signal, thereby controlling the power on or off of the magnetic lock to achieve door opening and unlocking. At the same time, when someone presses the doorbell switch S, the main control circuit generates a door opening signal based on the level conversion between the two detection signal input terminals. After receiving the door opening signal, the owner confirms whether the visitor is a permitted visitor. If the visitor is a permitted visitor, the unlock button of the access control system is pressed to generate a drive signal, which is output to the drive circuit. The drive circuit controls the on-off of relay AJ according to the drive signal, thereby controlling the power on or off of the magnetic lock to achieve door opening and unlocking.

[0026] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fingerprint cipher dual signal output control circuit, characterized in that : It includes a power supply circuit, a main control circuit, a drive circuit, a terminal J2, a wireless transmission circuit, a doorbell switch S and a fingerprint coder. The wired control signal output end of the main control circuit is electrically connected to the control signal input end of the drive circuit, and the control signal output end of the drive circuit is electrically connected to the No. 3, 4, and 5 terminals of the terminal J2 respectively. The No. 3, 4, and 5 terminals of the terminal J2 are electrically connected to the input ends corresponding to the access control magnetic lock power supply respectively. The two-way detection signal input circuit of the main control circuit is electrically connected to the No. 7 and No. 8 terminals of the terminal J2 respectively. The doorbell switch S is electrically connected between the No. 7 and No. 8 terminals of the terminal J2. The wireless signal output end of the main control circuit is electrically connected to the signal input end of the wireless transmission circuit, and the output end of the wireless transmission circuit is wirelessly connected to the fingerprint coder.

2. The fingerprint cipher dual signal output control circuit according to claim 1, characterized in that The power supply circuit includes a voltage conversion chip U5, a diode D1, a capacitor C5, a capacitor C15 and a capacitor C6. The positive electrode of the diode D1 is connected to an external 12V voltage, the negative electrode of the diode D1 is electrically connected to the input end of the voltage conversion chip U5, the negative electrode of the diode D1 is grounded through the capacitor C5, the grounding end of the voltage conversion chip U5 is grounded, the capacitor C5 and the capacitor C15 are connected in parallel between the output end of the voltage conversion chip U5 and the ground, and the output end of the voltage conversion chip U5 is electrically connected to the power input end of the drive circuit.

3. The fingerprint cipher dual signal output control circuit according to claim 2, characterized in that The voltage conversion chip U5 adopts a voltage stabilizing chip model ME6211.

4. The fingerprint cipher dual signal output control circuit according to claim 1, characterized in that The drive circuit includes a capacitor C3, a diode D2, a relay AJ1, a resistor R26 and a transistor Q1, wherein the anode of the diode D1 is grounded through the capacitor C3, the anode of the diode D2 is electrically connected to the collector of the diode D2 and the cathode of the relay AJ1 respectively, the emitter of the transistor Q1 is grounded, the base of the transistor Q1 is electrically connected to the control signal output end of the main control circuit through the resistor R26, the cathode of the diode D2 and the anode of the relay AJ1 are electrically connected to the output end of the power supply circuit respectively, the normally open contact and the normally closed contact of the relay AJ1 are electrically connected to the No. 3 terminal and the No. 5 terminal of the terminal J2 respectively, and the common end of the relay AJ1 is electrically connected to the No. 4 terminal of the terminal J2.

5. The fingerprint cipher dual signal output control circuit according to claim 1, characterized in that The wireless transmission circuit includes an inductor L3, a capacitor C31, a capacitor C32, an inductor L4, a transmitting chip U3, a crystal oscillator Y2 and a resistor R80. The power input end of the transmitting chip U3 is electrically connected to the output end of the power circuit, the signal input end of the transmitting chip U3 is electrically connected to the signal output end of the main control circuit, the signal input end of the transmitting chip U3 is grounded through the resistor R80, the constant signal input end of the transmitting chip U3 is grounded through the crystal oscillator Y2, the ground end of the transmitting chip U3 is grounded, the signal output end of the transmitting chip U3 is electrically connected to the output end of the power circuit through the inductor L4, the capacitor C32, the inductor L3 and the capacitor C31 are connected in series between the signal output end of the transmitting chip U3 and the ground, and the common end of the inductor L3 and the capacitor C31 is electrically connected to the fingerprint cipher.

6. The fingerprint cipher dual signal output control circuit according to claim 5, characterized in that The transmitting chip U3 adopts the transmitting chip model F4455B.

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