Motor driving module of high-safety key cabinet

Abstract

The utility model relates to a motor driving module of a high-safety key cabinet, the preceding stage input of the module is connected with a controller or a pulse generation module, the module comprises a phase judgment unit, the output of the phase judgment unit is connected with an inversion unit, and the output of the phase judgment unit comprises a first output port and a second output port. The inverter unit comprises an upper bridge circuit and a lower bridge circuit, the first output port is connected with the input of the upper bridge circuit, the second output port is connected with the input of the lower bridge circuit, and the output of the upper bridge circuit and the output of the lower bridge circuit are in parallel control connection with a motor B1. According to the key cabinet, manual door opening is not needed, the key cabinet can be automatically opened and closed through the motor through an internal command program, personnel contact is not needed in the cabinet opening process, and safety, intelligence and convenience are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of motor driving, in particular to a motor driving module for a key cabinet with high security. Background Art

[0002] In some special or confidential areas, the storage and management of keys are taken very seriously, and traditional key cabinets are used. For example, the duty room staff is responsible for unified management of the keys, or the corresponding keys are locked in different cabinets. When the key to the corresponding cabinet is needed, the duty staff will take it out and distribute it. However, for traditional key cabinets, it is guarded by a single person, and the cabinet door is opened manually when the key is taken. This method has a low fault tolerance or confidentiality. If an electric intelligent controlled key cabinet is adopted, the cabinet door needs to be automatically driven to open by a motor. For example, when the key needs to be taken, the duty staff inputs the unlocking instruction of the total key cabinet, including fingerprint, acoustic or password, etc. When the recognition is passed, the cabinet door needs to be opened automatically. When the manager responsible for individual keys takes the key, he inputs the corresponding unlocking instruction, and then the corresponding cabinet door is automatically opened. Obviously, this demand cannot be met by traditional mechanical key cabinets or safes. Summary of the Invention

[0003] The present invention proposes a motor drive module for a key cabinet with strong security. The key cabinet can be automatically opened and closed by a motor through an internal command program without manual door opening. During the cabinet opening process, no human contact is required, which increases security, intelligence and convenience.

[0004] The technical solutions of the present invention are as follows:

[0005] A motor drive module for a high-security key cabinet, the front-stage input of which is connected to a controller or a pulse generating module, and is characterized in that it includes a phase judgment unit, the output of which is connected to an inverter unit, the output of which includes a first output port and a second output port, the inverter unit includes an upper bridge circuit and a lower bridge circuit, the first output port is connected to the input of the upper bridge circuit, the second output port is connected to the input of the lower bridge circuit, and the output of the lower bridge circuit of the upper bridge circuit is controlled in parallel with a motor B1.

[0006] As a further optimization of the present application, isolation units are provided at the front ends of the upper bridge circuit and the lower bridge circuit.

[0007] As a further optimization of the present application, the phase judgment unit includes a comparator U1A and a comparator U1B, the inverting end of the comparator U1A and the non-inverting end of the comparator U1B are connected in parallel as the input end of the phase judgment unit, the non-inverting end of the comparator U1A is connected to the 3.3V voltage source through a resistor R14, the reverse end of the comparator U1B is connected to the non-inverting end of the comparator U1A through a resistor R15, the reverse end of the comparator U1B is connected to the power supply ground through a resistor R16, the output end of the comparator U1A serves as the first output port of the phase judgment unit, and the output end of the comparator U1B serves as the second output port of the phase judgment unit.

[0008] As a further optimization of the present application, the isolation unit includes an optocoupler O1-Q4, wherein the optocoupler O1 and the optocoupler O4 serve as the isolation unit of the upper bridge circuit, the optocoupler O2 and the optocoupler O3 serve as the isolation unit of the lower bridge circuit, the positive poles of the input sides of the optocoupler O1 and the optocoupler O4 are connected to a 3.3V voltage source, the negative poles of the input sides of the optocoupler O1 and the optocoupler O4 are connected in parallel to the first output port of the phase judgment unit, the negative poles of the output sides of the optocoupler O1 and the optocoupler O4 are grounded, the positive pole of the output side of the optocoupler O1 is connected to the first controlled end of the upper bridge circuit, and the positive pole of the output side of the optocoupler O4 is connected to the second controlled end of the upper bridge circuit;

[0009] The positive poles of the input sides of the optocoupler O2 and the optocoupler O3 are connected to a 3.3V voltage source, the negative poles of the input sides of the optocoupler O2 and the optocoupler O3 are connected in parallel to the second output port of the phase judgment unit, the positive poles of the output sides of the optocoupler O2 and the optocoupler O3 are connected to a 12V voltage source, the negative pole of the output side of the optocoupler O2 is connected to the first controlled end of the lower bridge circuit, and the negative pole of the output side of the optocoupler O3 is connected to the second controlled end of the lower bridge circuit.

[0010] As a further optimization of the present application, the upper bridge circuit includes switch tubes Q1 and Q4, the lower bridge circuit includes switch tubes Q2 and Q3, and the channel types of the switch tubes in the upper bridge circuit and the lower bridge circuit are opposite.

[0011] As a further optimization of the present application, the gate of the switch tube Q1 serves as the first controlled end of the upper bridge circuit, the gate of the switch tube Q4 serves as the second controlled end of the upper bridge circuit, the source of the switch tube Q1 and the source of the switch tube Q4 are connected in parallel to a 12V voltage source, and the source of the switch tube Q1 and the drain of the switch tube Q4 are connected in parallel to the two electrodes of the motor B1.

[0012] As a further optimization of the present application, the gate of the switch tube Q2 serves as the first controlled end of the lower bridge circuit, the gate of the switch tube Q3 serves as the second controlled end of the lower bridge circuit, the source of the switch tube Q2 and the source of the switch tube Q3 are grounded, and the source of the switch tube Q2 and the drain of the switch tube Q3 are connected in parallel to the two electrodes of the motor B1.

[0013] As a further optimization of the present application, the off states of the two switching tubes connected to one electrode of the motor are opposite.

[0014] As a further optimization of the present application, a diode is connected in parallel between the source and drain of each switch tube, and the current direction of each diode points to the high potential.

[0015] The working principle and beneficial effects of the present invention are:

[0016] The front-end of this application is connected to the controller, which will give 0 or 1 signals. When the control signal of the controller is sent to the phase judgment unit, the phase judgment unit compares it with the threshold to read the control signal and converts the control signal into a drive command for the rear-stage inverter unit. The inverter unit converts the external 12V DC drive into an AC pulse signal that can be used by the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] Figure 1 This is the circuit diagram of this application. DETAILED DESCRIPTION

[0019] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0020] As the instruction manual Figure 1 As shown, a motor drive module for a strong security key cabinet, the front-stage input of the module is connected to the controller or the pulse generating module, including a phase judgment unit, the output of the phase judgment unit is connected to the inverter unit, the output of the phase judgment unit includes a first output port and a second output port, the inverter unit includes an upper bridge circuit and a lower bridge circuit, the first output port is connected to the input of the upper bridge circuit, the second output port is connected to the input of the lower bridge circuit, and the output of the lower bridge circuit of the upper bridge circuit is controlled in parallel to be connected to the motor B1.

[0021] Two comparators constitute the phase judgment unit of the present application. The front-stage controller, etc. are not within the scope of protection of the present application, so they will not be described in detail. The controller can generally be implemented as a single-chip microcomputer. The phase judgment module converts the signal into 0 or 1 signals that can be recognized by the subsequent circuit according to the input signal. The switch tubes of the upper bridge circuit and the lower bridge circuit on the same side have opposite on-off states to ensure that the current passes through the conductive switch tube on the diagonal side.

[0022] The front ends of the upper bridge circuit and the lower bridge circuit are both provided with an isolation unit, which plays an amplifying role and is used to convert the output signal of the phase determination module of the front stage into a driving signal that can drive the switch tube of the back stage.

[0023] As the instruction manual Figure 1 As shown, the phase judgment unit includes a comparator U1A and a comparator U1B, the inverting end of the comparator U1A and the non-inverting end of the comparator U1B are connected in parallel as the input end of the phase judgment unit, the non-inverting end of the comparator U1A is connected to a 3.3V voltage source through a resistor R14, the reverse end of the comparator U1B is connected to the non-inverting end of the comparator U1A through a resistor R15, the reverse end of the comparator U1B is connected to the power supply ground through a resistor R16, the output end of the comparator U1A serves as the first output port of the phase judgment unit, and the output end of the comparator U1B serves as the second output port of the phase judgment unit.

[0024] When the signal output by the controller is high, the voltage value needs to be higher than the voltage value of the inverting terminal of the comparator U1B and higher than the non-inverting terminal of the comparator U1A. At this time, the comparator U1A outputs a low potential and the comparator U1B outputs a high potential.

[0025] The isolation unit includes optocouplers O1-Q4, wherein the optocoupler O1 and the optocoupler O4 serve as isolation units of the upper bridge circuit, and the optocoupler O2 and the optocoupler O3 serve as isolation units of the lower bridge circuit. The positive poles of the input sides of the optocoupler O1 and the optocoupler O4 are connected to a 3.3V voltage source, the negative poles of the input sides of the optocoupler O1 and the optocoupler O4 are connected in parallel to the first output port of the phase determination unit, the negative poles of the output sides of the optocoupler O1 and the optocoupler O4 are grounded, and the positive pole of the output side of the optocoupler O1 is connected to the upper bridge circuit. The first controlled end, the positive electrode of the output side of the optocoupler O4 is connected to the second controlled end of the upper bridge circuit; the positive electrodes of the input sides of the optocoupler O2 and the optocoupler O3 are connected to a 3.3V voltage source, the negative electrodes of the input sides of the optocoupler O2 and the optocoupler O3 are connected in parallel to the second output port of the phase judgment unit, the positive electrodes of the output sides of the optocoupler O2 and the optocoupler O3 are connected to a 12V voltage source, the negative electrode of the output side of the optocoupler O2 is connected to the first controlled end of the lower bridge circuit, and the negative electrode of the output side of the optocoupler O3 is connected to the second controlled end of the lower bridge circuit.

[0026] The optocoupler can isolate the front-stage comparator from the high-voltage driving voltage of the back-stage. The optocoupler converts the digital potential signal of the front-stage into an internal optical signal, and then converts it into the driving signal of the back-stage through the intensity of the optical signal.

[0027] The upper bridge circuit includes a switch tube Q1 and a switch tube Q4, and the lower bridge circuit includes a switch tube Q2 and a switch tube Q3. The channel types of the switch tubes in the upper bridge circuit and the lower bridge circuit are opposite. The gate of the switch tube Q1 serves as the first controlled end of the upper bridge circuit, and the gate of the switch tube Q4 serves as the second controlled end of the upper bridge circuit. The source of the switch tube Q1 and the source of the switch tube Q4 are connected in parallel to a 12V voltage source. The source of the switch tube Q1 and the drain of the switch tube Q4 are connected in parallel to the two electrodes of the motor B1. The gate of the switch tube Q2 serves as the first controlled end of the lower bridge circuit, and the gate of the switch tube Q3 serves as the second controlled end of the lower bridge circuit. The source of the switch tube Q2 and the source of the switch tube Q3 are grounded. The source of the switch tube Q2 and the drain of the switch tube Q3 are connected in parallel to the two electrodes of the motor B1. The off states of the two switches connected to one electrode of the motor are opposite.

[0028] When the potential of the control signal is high, the comparator U1B outputs a high potential and the comparator U1A outputs a low potential. At this time, the optocoupler O1 is turned on, the optocoupler O2 is turned off, the optocoupler O3 is turned on, and the optocoupler O4 is turned off. The gate of the switch tube Q1 is low, the gate of the switch tube Q2 is high, the gate of the switch tube Q4 is low, and the gate of the switch tube Q3 is high, so the current passes through the switch tubes Q1 and Q3; when the potential of the control signal is low, the comparator U1B outputs a low potential and the comparator U1A outputs a high potential. At this time, the optocoupler O2 is turned on, the optocoupler O1 is turned off, the optocoupler O4 is turned on, and the optocoupler O3 is turned off. The gate of the switch tube Q1 is high, the gate of the switch tube Q2 is low, the gate of the switch tube Q4 is high, and the gate of the switch tube Q3 is low, so the current passes through the switch tubes Q4 and Q3.

[0029] A diode is connected in parallel between the source and drain of each switch, with the current in each diode pointing toward a higher potential. The diode stabilizes the voltage and prevents the reverse current stored in the motor coil from breaking down the device.

[0030] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A motor drive module for a strong security key cabinet, wherein the front-stage input of the motor drive module of the strong security key cabinet is connected to a controller or a pulse generating module, characterized in that: It includes a phase judgment unit, the output of which is connected to an inverter unit, the output of which includes a first output port and a second output port, the inverter unit includes an upper bridge circuit and a lower bridge circuit, the first output port is connected to the input of the upper bridge circuit, the second output port is connected to the input of the lower bridge circuit, and the output of the lower bridge circuit of the upper bridge circuit is controlled in parallel with the motor B1.

2. The motor drive module for a high-security key cabinet according to claim 1, characterized in that: Isolation units are provided at the front ends of the upper bridge circuit and the lower bridge circuit.

3. The motor drive module for a high-security key cabinet according to claim 1, characterized in that: The phase judgment unit includes a comparator U1A and a comparator U1B. The inverting end of the comparator U1A and the non-inverting end of the comparator U1B are connected in parallel as the input end of the phase judgment unit. The non-inverting end of the comparator U1A is connected to a 3.3V voltage source through a resistor R14. The reverse end of the comparator U1B is connected to the non-inverting end of the comparator U1A through a resistor R15. The reverse end of the comparator U1B is connected to the power supply ground through a resistor R16. The output end of the comparator U1A serves as the first output port of the phase judgment unit, and the output end of the comparator U1B serves as the second output port of the phase judgment unit.

4. The motor drive module for a high-security key cabinet according to claim 2, characterized in that: The isolation unit includes optocouplers O1-Q4, wherein the optocoupler O1 and the optocoupler O4 serve as isolation units of the upper bridge circuit, and the optocoupler O2 and the optocoupler O3 serve as isolation units of the lower bridge circuit, the positive electrodes of the input sides of the optocoupler O1 and the optocoupler O4 are connected to a 3.3V voltage source, the negative electrodes of the input sides of the optocoupler O1 and the optocoupler O4 are connected in parallel to the first output port of the phase determination unit, the negative electrodes of the output sides of the optocoupler O1 and the optocoupler O4 are grounded, the positive electrode of the output side of the optocoupler O1 is connected to the first controlled end of the upper bridge circuit, and the positive electrode of the output side of the optocoupler O4 is connected to the second controlled end of the upper bridge circuit; The positive poles of the input sides of the optocoupler O2 and the optocoupler O3 are connected to a 3.3V voltage source, the negative poles of the input sides of the optocoupler O2 and the optocoupler O3 are connected in parallel to the second output port of the phase judgment unit, the positive poles of the output sides of the optocoupler O2 and the optocoupler O3 are connected to a 12V voltage source, the negative pole of the output side of the optocoupler O2 is connected to the first controlled end of the lower bridge circuit, and the negative pole of the output side of the optocoupler O3 is connected to the second controlled end of the lower bridge circuit.

5. The motor drive module for a high-security key cabinet according to claim 1, characterized in that: The upper bridge circuit includes a switch tube Q1 and a switch tube Q4, and the lower bridge circuit includes a switch tube Q2 and a switch tube Q3. The channel types of the switch tubes in the upper bridge circuit and the lower bridge circuit are opposite.

6. The motor drive module for a high-security key cabinet according to claim 5, characterized in that: The gate of the switch tube Q1 serves as the first controlled end of the upper bridge circuit, the gate of the switch tube Q4 serves as the second controlled end of the upper bridge circuit, the source of the switch tube Q1 and the source of the switch tube Q4 are connected in parallel to a 12V voltage source, and the source of the switch tube Q1 and the drain of the switch tube Q4 are connected in parallel to two electrodes of the motor B1.

7. The motor drive module for a high-security key cabinet according to claim 5, characterized in that: The gate of the switch tube Q2 serves as the first controlled end of the lower bridge circuit, the gate of the switch tube Q3 serves as the second controlled end of the lower bridge circuit, the source of the switch tube Q2 and the source of the switch tube Q3 are grounded, and the source of the switch tube Q2 and the drain of the switch tube Q3 are connected in parallel to the two electrodes of the motor B1.

8. The motor drive module for a high-security key cabinet according to claim 5, characterized in that: The off states of the two switching tubes connected to one electrode of the motor are opposite.

9. A motor drive module for a high-security key cabinet according to any one of claims 5 to 8, characterized in that: A diode is connected in parallel between the source and drain of each switch tube, and the current direction of each diode points to the high potential.

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