Electromagnetic door lock control device and method for matcher without Hall proximity recognition and electric lock door lock

Abstract

The invention discloses an electromagnetic door lock control device and method for matcher Hall-proximity-recognition-free and an electric lock door lock. A high-voltage power supply control unit is used for controlling power supply to an electromagnet through a high-voltage power supply; the low-voltage electrification detection control unit is used for controlling electrification of the electromagnet through a low-voltage power supply and synchronously detecting the voltage at the electromagnet; the detection result output unit is used for converting the obtained detection signal into a high-level / low-level signal to reflect whether the distance between an electromagnet of the electromagnetic door lock and a matcher is within a limit value; and the main control unit is used for providing a high-voltage power supply control signal for the electromagnet for the high-voltage power supply control unit, providing a low-voltage power-on control signal for the electromagnet for the low-voltage power-on detection control unit, and accessing a high-level / low-level signal from the detection result output unit. Because a Hall device is not adopted, the proximity detection precision and the whole machine quality can be improved, and the production cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of safety door switches, and in particular to a Hall-free proximity recognition control device and method for a matching device of an electromagnetic door lock, and an electric door lock. Background Art

[0002] Electromagnetic safety door switches, used to close and lock safety doors, consist of a main body and a matching device, each fixed to a location on the safety door frame or door. The main body is equipped with an electromagnet, and the matching device is made of steel with an embedded magnet, an electronic tag, and a permanent magnet. When powered off, the main body is attracted to the matching device's magnet. When powered on, the main body is locked by the electromagnet and the matching device's magnet. After locking the door, the main body not only verifies the matching device's legitimacy through RFID, but also verifies that the matching device is in the specified position, close to and at the same level as the main body, to achieve greater attraction and prevent misalignment between the main body and the matching device during installation and closing.

[0003] In order to identify whether the matcher and the main body are at the same horizontal position, the traditional method is to use a Hall element on the main body to identify the permanent magnet on the matcher. The defects of this method are: (1) Due to the poor sensitivity consistency of the Hall element, the magnetic consistency of the permanent magnet is also poor, and the Hall element has poor anti-interference ability to the environment, it is difficult to calibrate the distance between the main body of multiple devices and the matcher in mass production, affecting the stability of product performance; (2) Since the permanent magnet uses a permanent magnet with an ultra-strong magnetic force of 5000Gs, it may absorb metal impurities in the environment, affecting the quality of the entire device; (3) In production, the assembly of the permanent magnet requires a specific jig, which is difficult to install and requires special management, increasing the cost.

[0004] In view of this, it is necessary to propose a new electromagnetic door lock control device and method to improve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide an electromagnetic door lock control device, method and electric door lock with a matching device without Hall proximity recognition, which can improve the proximity detection accuracy and the quality of the whole machine, reduce production costs, and avoid the inconvenience caused by the existing electromagnetic door lock using Hall devices to realize proximity detection.

[0006] The present invention provides the following solutions: According to a first aspect, the present invention provides an electromagnetic door lock control device without Hall proximity recognition, comprising: A high voltage power supply control unit, used for controlling the power supply to the electromagnet through the high voltage power supply; A low voltage power-on detection control unit is used to control the power supply to the electromagnet through the low voltage power supply and synchronously detect the voltage at the electromagnet as a detection signal; a detection result output unit connected to the low voltage power-on detection control unit, configured to convert the acquired detection signal into a high level / low level signal to reflect whether the distance between the electromagnet of the electromagnetic door lock and the matcher is within a limited value; and The main control unit is connected to the high-voltage power supply control unit, the low-voltage power-on detection control unit and the detection result output unit, and is used to provide a high-voltage power supply control signal for the electromagnet to the high-voltage power supply control unit, provide a low-voltage power-on control signal for the electromagnet to the low-voltage power-on detection control unit, access the high-level / low-level signal from the detection result output unit, and judge whether the distance between the electromagnet of the electromagnetic door lock and the matcher is within the limit value, so as to decide whether to engage and lock the electromagnet and output the OSSD signal.

[0007] In some embodiments, the high voltage power supply control unit includes: The power supply positive electrode is connected to the control unit, which is connected between the first end of the electromagnet and the positive electrode of the high voltage power supply, and is used to control the connection or disconnection between the first end of the electromagnet and the positive electrode of the high voltage power supply; The power supply and grounding control unit is connected between the second end of the electromagnet and the grounding terminal, and is used to control the connection or disconnection between the second end of the electromagnet and the grounding terminal; The pull-in power supply positive pole connection control unit and the pull-in power supply grounding control unit are synchronously turned on or off according to the high voltage power supply control signal to the electromagnet.

[0008] In some embodiments, the pull-in power supply positive pole connection control unit includes a PMOS tube, a first NMOS tube, a first resistor, a second resistor, a third resistor and a fourth resistor, the positive pole of the high voltage power supply is connected to the source of the PMOS tube and is connected to the gate of the PMOS tube through the first resistor, the drain of the PMOS tube is connected to the first end of the electromagnet, the gate of the PMOS tube is connected to the drain of the first NMOS tube through the second resistor, the source of the first NMOS tube is connected to the ground end, the gate of the first NMOS tube is connected to the ground end through the fourth resistor, and is connected to one end of the third resistor, and the other end of the third resistor serves as a high voltage power supply control port and is connected to the main control unit; the pull-in power supply grounding control unit includes a second NMOS tube, the second end of the electromagnet is connected to the drain of the second NMOS tube, the source of the second NMOS tube is grounded, and the gate of the second NMOS tube is connected to the gate of the first NMOS tube.

[0009] In some embodiments, the low voltage power-on detection control unit includes: a first diode, having an anode connected to the positive electrode of the low voltage power supply and a cathode connected to the first end of the electromagnet; a freewheeling diode, a cathode connected to the first end of the electromagnet, and an anode connected to the second end of the electromagnet; a detection resistor connected between the second end of the electromagnet and the ground terminal, for detecting the voltage at the second end of the electromagnet, the second end of the electromagnet serving as a detection signal port; The detection power supply control unit is connected between the second end of the electromagnet and the ground end, and is used for controlling the connection or disconnection between the second end of the electromagnet and the ground end.

[0010] In some embodiments, the detection power supply control unit includes a third NMOS tube and a fifth resistor, the drain of the third NMOS tube is connected to the second end of the electromagnet, the source of the third NMOS tube is connected to the ground end, and the gate of the third NMOS tube serves as a low voltage power-on control port and is connected to the ground end through the fifth resistor.

[0011] In some embodiments, the detection result output unit includes a comparator, a sixth resistor, a seventh resistor, an eighth resistor and a ninth resistor, the positive input terminal of the comparator is connected to one end of the sixth resistor, the other end of the sixth resistor is connected to the detection signal port, the seventh resistor is connected in parallel between the positive input terminal and the output terminal of the comparator, the output terminal of the comparator serves as the detection result port, the positive terminal of the low voltage power supply is connected to the negative input terminal of the comparator via the eighth resistor, the negative input terminal of the comparator is connected to the ground terminal via the ninth resistor, and the comparator is a hysteresis comparator.

[0012] In some embodiments, the electromagnetic door lock control device without Hall proximity recognition of the matching device further includes: a safety signal input unit, connected to the main control unit, and configured to input a received safety signal into the main control unit; a locking signal input unit, connected to the main control unit, and configured to input a received locking signal to the main control unit; and An OSSD signal output unit, connected to the main control unit, for outputting the OSSD signal received from the main control unit to the outside; The main control unit is further used to make a comprehensive decision based on the safety signal received from the safety signal input unit, the lock signal received from the lock signal input unit, and the high level / low level signal received from the detection result output unit, and generate an OSSD signal to send to the OSSD signal output unit.

[0013] In some embodiments, an RFID identification unit is further included. The RFID identification unit is connected to the main control unit and is used to identify the electronic tag on the matcher and determine whether the electronic tag is legal.

[0014] In some embodiments, a high voltage power supply unit and a low voltage power supply unit are also included, wherein the high voltage power supply unit is used to convert the external direct current power input into high voltage direct current power, and the low voltage power supply unit is used to convert the high voltage direct current power into low voltage direct current power.

[0015] According to a second aspect, the present invention provides a method for controlling an electromagnetic door lock without Hall proximity recognition by a matching device, which is implemented using the electromagnetic door lock control device without Hall proximity recognition by a matching device according to the first aspect, comprising: The main control unit provides a high-voltage power supply control signal to the high-voltage power supply control unit to control the high-voltage power supply to stop supplying power to the electromagnet; The main control unit provides a low-voltage power-on control signal to the low-voltage power-on detection control unit, controls the low-voltage power supply to energize the electromagnet at a certain frequency, and simultaneously detects the voltage at the electromagnet; The detection result output unit converts the acquired detection signal into a high level / low level signal and sends it to the main control unit to reflect whether the distance between the electromagnet of the electromagnetic door lock and the matcher is within the limit value.

[0016] According to a third aspect, the present invention also provides an electric door lock, comprising an electric door lock body and a matcher, wherein the electric door lock body is provided with an electromagnet and an electromagnetic door lock control device without Hall proximity recognition as described in the first aspect above.

[0017] Compared with the prior art, the present invention has the following advantages: In an embodiment of the present invention, the main control unit provides a high-voltage power supply control signal to the high-voltage power supply control unit to control whether the high-voltage power supply is connected to the electromagnet to control whether the electromagnet generates magnetic attraction. In addition, when the high-voltage power supply is not connected to the electromagnet, the main control unit can control the low-voltage power supply to be connected to the electromagnet at a certain frequency by providing a low-voltage power-on control signal to the low-voltage power-on detection control unit, and synchronously detect the voltage at the electromagnet. By obtaining the voltage detection signal at the electromagnet, the obtained detection signal is converted into a high-level / low-level signal to reflect whether the distance between the electromagnet of the electromagnetic door lock and the matcher is within the limit value. Since the embodiment of the present invention does not use Hall devices and permanent magnets, it can improve the proximity detection accuracy and the quality of the whole machine, reduce production costs, and avoid the inconvenience caused by the existing electromagnetic door lock using Hall devices to achieve proximity detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a principle block diagram of an embodiment of an electromagnetic door lock control device with a matching device without Hall proximity recognition according to the present invention; Figure 2 This is a circuit schematic diagram of a high-voltage power supply control unit and a low-voltage power-on detection control unit in some embodiments of the present invention; Figure 3 is a circuit schematic diagram of a detection result output unit in some embodiments of the present invention; Figure 4 This is a principle block diagram of another embodiment of an electromagnetic door lock control device without Hall proximity recognition of a matching device according to the present invention.

[0020] Figure 5 1 is a schematic circuit diagram of a PNP-type safety signal input unit and a lock signal input unit according to some embodiments of the present invention; Figure 6 This is a schematic circuit diagram of an NPN-type safety signal input unit and a lock signal input unit according to some embodiments of the present invention; Figure 7 1 is a schematic circuit diagram of a PNP-type OSSD signal output unit according to some embodiments of the present invention; Figure 8 is a circuit schematic diagram of an NPN-type OSSD signal output unit according to some embodiments of the present invention; Figure 9 is a schematic circuit diagram of a high voltage power supply unit and a low power supply voltage unit in some embodiments of the present invention; Figure 10 The present invention is a flowchart of an embodiment of an electromagnetic door lock control method without Hall proximity recognition of a matching device.

[0021] In the picture: 100-high voltage power supply control unit; 200-low voltage power-on detection control unit; 300-detection result output unit; 400-main control unit; 500-safety signal input unit; 600-lock signal input unit; 700-OSSD signal output unit; 800-RFID identification unit; 910-high voltage power supply unit; 920-low power supply voltage unit 912. DETAILED DESCRIPTION

[0022] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0023] See also Figure 1 The present invention proposes an embodiment of an electromagnetic door lock control device with a matching device and no Hall proximity recognition, comprising a high-voltage power supply control unit 100, a low-voltage power-on detection control unit 200, a detection result output unit 300, and a main control unit 400. The high-voltage power supply control unit 100 is used to control the power supply to the electromagnet through a high-voltage power supply. The low-voltage power-on detection control unit 200 is used to control the power supply to the electromagnet through a low-voltage power supply and synchronously detect the voltage at the electromagnet as a detection signal. The detection result output unit 300 is connected to the low-voltage power-on detection control unit 200 and is used to convert the acquired detection signal into a high-level / low-level signal to reflect whether the distance between the electromagnet of the electromagnetic door lock and the matching device is within a specified value. The main control unit 400 is connected to the high-voltage power supply control unit 100, the low-voltage power-on detection control unit 200 and the detection result output unit 300, and is used to provide a high-voltage power supply control signal for the electromagnet to the high-voltage power supply control unit 100, and provide a low-voltage power-on control signal for the electromagnet to the low-voltage power-on detection control unit 200, and receive the high-level / low-level signal from the detection result output unit 300 to determine whether the distance between the electromagnet of the electromagnetic door lock and the matcher is within the limit value, so as to decide whether to engage and lock the electromagnet and output the OSSD signal.

[0024] It should be noted that when it is determined that the distance between the electromagnet and the matcher of the electromagnetic door lock is within a limited value, the electromagnet is controlled to be attracted and locked to obtain a greater attraction force, and the OSSD signal is output after locking, which belongs to the existing technology.

[0025] In an embodiment of the present invention, the main control unit 400 provides a high-voltage power supply control signal to the high-voltage power supply control unit 100 to control whether the high-voltage power supply is connected to the electromagnet to control whether the electromagnet generates magnetic attraction. Furthermore, when the high-voltage power supply is not connected to the electromagnet, the main control unit 400 can control the low-voltage power supply to be connected to the electromagnet at a certain frequency by providing a low-voltage power supply control signal to the low-voltage power supply detection control unit 200, and simultaneously detect the voltage at the electromagnet. The voltage detection signal obtained at the electromagnet is converted into a high-level / low-level signal to reflect whether the distance between the electromagnet and the matching device of the electromagnetic door lock is within a specified value, thereby determining whether to engage and lock the electromagnet and output an OSSD signal. Since the main body of the embodiment of the present invention does not use a Hall effect device and the matching device does not use a permanent magnet, the proximity detection accuracy and overall quality of the device can be improved, the production cost can be reduced, and the inconvenience of the existing electromagnetic door lock using a Hall effect device for proximity detection can be avoided.

[0026] In some embodiments, see Figure 2 The high-voltage power supply control unit 100 includes a power supply positive pole connection control unit and a power supply grounding control unit. The power supply positive pole connection control unit is connected between the first end of the electromagnet L2 and the positive pole of the high-voltage power supply, and is used to control the connection or disconnection between the first end of the electromagnet L2 and the positive pole of the high-voltage power supply. The power supply grounding control unit is connected between the second end of the electromagnet L2 and the grounding terminal, and is used to control the connection or disconnection between the second end of the electromagnet L2 and the grounding terminal. The power supply positive pole connection control unit and the power supply grounding control unit are synchronously connected or disconnected according to the high-voltage power supply control signal to the electromagnet.

[0027] In some embodiments, see Figure 2 The positive electrode of the power supply is connected to the control unit, which includes a PMOS transistor Q5, a first NMOS transistor Q7, a first resistor R21, a second resistor R27, a third resistor R29 and a fourth resistor R30. The positive electrode of the high voltage power supply +24V is connected to the source of the PMOS transistor Q5 and connected to the gate of the PMOS transistor Q5 through the first resistor R21. The drain of the PMOS transistor Q5 is connected to the first end of the electromagnet L2. The gate of the PMOS transistor Q5 is connected to the drain of the first NMOS transistor Q7 through the second resistor R27. The source of the first NMOS transistor Q7 is connected to The gate of the first NMOS transistor Q7 is connected to the ground terminal GND via the fourth resistor R30 and to one end of the third resistor R29. The other end of the third resistor R29 serves as the high-voltage power supply control port ETM_LOCK and is connected to the main control unit 400. The pull-in power supply grounding control unit includes a second NMOS transistor Q9. The second end of the electromagnet L2 is connected to the drain of the second NMOS transistor Q9. The source of the second NMOS transistor Q9 is grounded. The gate of the second NMOS transistor Q9 is connected to the gate of the first NMOS transistor Q7.

[0028] When the high-voltage power supply control port ETM_LOCK receives a high-level control signal, both the first NMOS transistor Q7 and the second NMOS transistor Q9 are turned on. The conduction of the second NMOS transistor Q9 pulls down the gate level of the PMOS transistor Q5, thereby controlling the conduction of the PMOS transistor Q5, connecting the positive electrode of the high-voltage power supply (+24V) to the first terminal of the electromagnet L2. Simultaneously, the conduction of the first NMOS transistor Q7 connects the ground terminal GND to the second terminal of the electromagnet L2. At this point, the electromagnet L2 is powered by the high-voltage power supply.

[0029] When the high-voltage power supply control port ETM_LOCK receives a low-level control signal, both the first NMOS transistor Q7 and the second NMOS transistor Q9 are turned off. The turning off of the second NMOS transistor Q9 pulls up the gate level of the PMOS transistor Q5, thereby controlling the turning off of the PMOS transistor Q5. This completely disconnects the two ends of the electromagnet L2 from the high-voltage power supply branch, thereby protecting the low-voltage power-on detection control unit 200 from being connected in series with the high-voltage power supply branch during the voltage detection process and from being affected by the high voltage.

[0030] In some embodiments, the high voltage power supply is a 24V DC power supply.

[0031] In some embodiments, see Figure 2 The low-voltage power-on detection control unit 200 includes a first diode D11, a freewheeling diode D13, a detection resistor R34, and a detection power supply control unit. The anode of the first diode D11 is connected to the positive electrode 3.3V_1 of the low-voltage power supply, and the cathode is connected to the first end of the electromagnet L2. The first diode D11 is used to prevent the high-voltage power supply from flowing back into the low-voltage power supply. The cathode of the freewheeling diode D13 is connected to the first end of the electromagnet L2, and the anode is connected to the second end of the electromagnet L2. The freewheeling diode D13 is used to absorb the peak voltage when the electromagnet L2 is turned on and off. The detection resistor R34 is connected between the second end of the electromagnet L2 and the ground terminal GND, and is used to detect the voltage at the second end of the electromagnet L2. The second end of the electromagnet L2 serves as the detection signal port ETM_CHK. The detection power supply control unit is connected between the second end of the electromagnet L2 and the ground terminal GND, and is used to control the connection or disconnection of the second end of the electromagnet L2 and the ground terminal GND.

[0032] In some embodiments, see Figure 2 The detection power supply control unit includes a third NMOS transistor Q10 and a fifth resistor R36. The drain of the third NMOS transistor Q10 is connected to the second end of the electromagnet L2, the source of the third NMOS transistor Q10 is connected to the ground terminal GND, and the gate of the third NMOS transistor Q10 serves as a low-voltage power-on control port ETM_PWM and is connected to the ground terminal GND via the fifth resistor R36.

[0033] When the low-voltage power-on control port ETM_PWM receives a high-level control signal from the main control unit 400, the third NMOS transistor Q10 turns on, connecting one end of the electromagnet L2 to the ground terminal GND, thereby connecting the electromagnet L2 to the low-voltage power supply. When the low-voltage power-on control port ETM_PWM receives a low-level control signal from the main control unit 400, the third NMOS transistor Q10 turns off, thereby disconnecting the electromagnet L2 from the low-voltage power supply.

[0034] When the electromagnet is disconnected from the high-voltage power supply, the main control unit 400 applies a PWM signal at a certain frequency to the low-voltage power control port ETM_PWM, connecting the electromagnet L2 to the low-voltage power supply at a certain frequency. The test voltage can be obtained at the detection signal port ETM_CHK through the detection resistor R34.

[0035] When the low-voltage power supply is a 3.3V DC power supply, a PWM signal with a period of 40ms and a duty cycle of 80% is applied to the low-voltage power-on control port ETM_PWM. Corresponding to different distances between the electromagnet and the matching device, the low-value segment voltage is obtained at the detection signal port ETM_CHK as the test voltage. Table 1 provides the experimental test results.

[0036] Table 1

[0037] It can be seen that the distance between the electromagnet and the matcher and the average value of the test voltage have a certain linear relationship. The distance between the electromagnet and the matcher can be reflected by obtaining the test voltage at the detection signal port ETM_CHK.

[0038] In some embodiments, see Figure 2 The first diode D11 is a Schottky diode, which can reduce the conduction voltage drop and reduce the loss.

[0039] In some embodiments, see Figure 3 The detection result output unit 300 includes a comparator U7, a sixth resistor R36, a seventh resistor R35, an eighth resistor R34, and a ninth resistor R37. The positive input terminal +IN of the comparator U7 is connected to one end of the sixth resistor R36, and the other end of the sixth resistor R36 is connected to the detection signal port ETM_CHK. The seventh resistor R35 is connected in parallel between the positive input terminal +IN and the output terminal OUT of the comparator U7. The output terminal OUT of the comparator U7 serves as the detection result port ETM_FB. The positive terminal of the low-voltage power supply is connected to the negative input terminal -IN of the comparator U7 via the eighth resistor R34. The negative input terminal -IN of the comparator U7 is connected to the ground terminal GND via the ninth resistor R37. The comparator U7 is a hysteresis comparator.

[0040] In this embodiment, the positive terminal 3.3V_2 of the low-voltage power supply is divided by the eighth resistor R34 and the ninth resistor R37 to obtain a reference voltage, which is then connected to the negative input terminal -IN of the comparator U7. The test voltage at the detection signal port ETM_CHK is compared with the first threshold voltage and the second threshold voltage set by this circuit unit. When the test voltage value increases and exceeds the first threshold voltage, a high-level signal is obtained at the detection result port ETM_FB. When the test voltage value decreases and falls below the second threshold voltage, a low-level signal is obtained at the detection result port ETM_FB. Therefore, when the output signal of the detection result port ETM_FB jumps to a high level, it indicates that the electromagnet and the matching device are approaching each other and the distance is less than the set value. When the output signal of the detection result port ETM_FB is low, it indicates that the distance between the electromagnet and the matching device has not reached the set value.

[0041] In some embodiments, the main control unit 400 includes a microprocessor or a single chip microcomputer.

[0042] In some embodiments, see Figure 4 The electromagnetic door lock control device without Hall proximity recognition of the matching device also includes a safety signal input unit 500, a lock signal input unit 600 and an OSSD signal output unit 700. The safety signal input unit 500 is connected to the main control unit 400 and is used to input the received safety signal to the main control unit 400. The lock signal input unit 600 is connected to the main control unit 400 and is used to input the received lock signal to the main control unit 400. The OSSD signal output unit 700 is connected to the main control unit 400 and is used to output the OSSD signal received from the main control unit 400 to the outside. The main control unit 400 is also used to make a comprehensive decision based on the safety signal received from the safety signal input unit 500, the lock signal received from the lock signal input unit 600, and the high level / low level signal received from the detection result output unit 300, and generate an OSSD signal and send it to the OSSD signal output unit 700.

[0043] In some electromagnetic door lock applications, the main control unit 400 outputs a valid OSSD signal to the outside through the OSSD signal output unit 700 only when the output signal of the detection result port ETM_FB is high and receives a valid safety signal and a valid lock signal from the outside. This indicates that the electromagnetic door lock can lock normally.

[0044] As some examples, Figure 5 shows a PNP type safety signal input unit 500 and a lock signal input unit 600, Figure 6The diagram shows an NPN-type safety signal input unit 500 and a lock signal input unit 600. The safety signal input unit 500 provides two safety signal inputs, receiving two external safety signals through the SAFE_1 and SAFE_2 ports, and outputting the two safety signals to the main control unit 400 through the SAF_IN_1 and SAF_IN_2 ports. The lock signal input unit 600 receives an external lock signal through the LOCK port and outputs the lock signal to the main control unit 400 through the LOCK_IN port.

[0045] As some examples, Figure 7 shows a PNP type OSSD signal output unit 700, Figure 8 The figure shows an NPN-type OSSD signal output unit 700. The OSSD signal output unit 700 provides two OSSD signal outputs, receives OSSD signals from the main control unit 400 through the SC1 and SC2 ports, outputs the OSSD signals to the outside through the OSSD1 and OSSD2 ports, and provides feedback signals of the OSSD signal output to the main control unit through the OSSD1_FB and OSSD2_FB ports.

[0046] In some embodiments, see Figure 4 The electromagnetic door lock control device without Hall proximity recognition of the matching device also includes an RFID recognition unit 800. The RFID recognition unit 800 is connected to the main control unit 400 and is used to identify the electronic tag on the matching device and determine whether the electronic tag is legal.

[0047] It should be noted that in some embodiments, before controlling the electromagnet to attract and lock, the main control unit 400 uses the RFID identification unit 800 to determine whether the currently approaching matcher is legal, for example, by identifying the electronic tag ID of the matcher to determine whether the electronic tag ID belongs to a set of legal electronic tag IDs.

[0048] In some embodiments, see Figure 9 The electromagnetic door lock control device without Hall proximity recognition of the matcher also includes a high-voltage power supply unit 910 and a low-voltage power supply unit 912. The high-voltage power supply unit 910 is used to convert the external DC power input into high-voltage DC power, and the low-voltage power supply unit is used to convert the high-voltage DC power into low-voltage DC power.

[0049] See also Figure 10 The present invention provides an embodiment of an electromagnetic door lock control method without Hall proximity recognition of a matching device, which can be implemented using the above-mentioned electromagnetic door lock control device without Hall proximity recognition of a matching device, including: S10, the main control unit provides a high-voltage power supply control signal to the high-voltage power supply control unit to control the high-voltage power supply to stop supplying power to the electromagnet; S20, the main control unit provides a low-voltage power-on control signal to the low-voltage power-on detection control unit, controls the low-voltage power supply to power the electromagnet at a certain frequency, and simultaneously detects the voltage at the electromagnet; S30, the detection result output unit converts the acquired detection signal into a high level / low level signal and sends it to the main control unit to reflect whether the distance between the electromagnet of the electromagnetic door lock and the matcher is within a limited value.

[0050] The present invention also provides an embodiment of an electric door lock, including an electric door lock body and a matcher. The electric door lock body is provided with an electromagnet and the matcher in the aforementioned embodiment is an electromagnetic door lock control device without Hall proximity recognition.

[0051] Those skilled in the art will understand that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by those skilled in the art in the art to which this invention belongs. It should also be understood that terms such as those defined in common dictionaries should be understood to have meanings consistent with their meanings in the context of the prior art and, unless specifically defined, will not be interpreted in an idealized or overly formal sense.

[0052] It should be noted that certain terms are used in this specification and claims to refer to specific components. Those skilled in the art will understand that different manufacturers may use different terms to refer to the same component. This specification and claims do not distinguish components based on differences in terms, but rather on differences in their functions.

[0053] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0054] Furthermore, those skilled in the art will appreciate that although some embodiments described herein include certain features that are included in other embodiments but not other features, combinations of features from different embodiments are intended to be within the scope of the present invention and to form different embodiments. For example, any one of the embodiments claimed in the claims may be used in any combination in the embodiments of the present invention.

[0055] Those skilled in the art will appreciate that the modules in the devices of the embodiments can be adaptively modified and installed in one or more devices different from the embodiments. The modules, units, or components in the embodiments can be combined into a single module, unit, or component, and furthermore, they can be divided into multiple sub-modules, sub-units, or sub-components. All features disclosed in this specification (including the corresponding claims, abstract, and drawings), and all processes or units of any method or device disclosed therein, can be combined in any combination, unless at least some of such features and / or processes or units are mutually exclusive. Unless expressly stated otherwise, each feature disclosed in this specification (including the corresponding claims, abstract, and drawings) may be replaced by an alternative feature that serves the same, equivalent, or similar purpose.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electromagnetic door lock control device without Hall proximity recognition, characterized in that: include: A high voltage power supply control unit (100), used for controlling the power supply to the electromagnet via the high voltage power supply; A low voltage power-on detection control unit (200) is used to control the power-on of the electromagnet through a low voltage power supply and synchronously detect the voltage at the electromagnet as a detection signal; a detection result output unit (300), connected to the low voltage power-on detection control unit (200), for converting the acquired detection signal into a high level / low level signal to reflect whether the distance between the electromagnet of the electromagnetic door lock and the matcher is within a limited value; and The main control unit (400) is connected to the high-voltage power supply control unit (100), the low-voltage power-on detection control unit (200) and the detection result output unit (300), and is used to provide a high-voltage power supply control signal for the electromagnet to the high-voltage power supply control unit (100), provide a low-voltage power-on control signal for the electromagnet to the low-voltage power-on detection control unit (200), access the high-level / low-level signal from the detection result output unit (300), and judge whether the distance between the electromagnet of the electromagnetic door lock and the matcher is within a limited value, so as to decide whether to engage and lock the electromagnet and output the OSSD signal.

2. The electromagnetic door lock control device without Hall proximity recognition according to claim 1, characterized in that: The high voltage power supply control unit (100) comprises: A power supply positive electrode connection control unit is connected between the first end of the electromagnet (L2) and the positive electrode of the high-voltage power supply, and is used to control the connection or disconnection between the first end of the electromagnet (L2) and the positive electrode of the high-voltage power supply; An attraction power supply grounding control unit is connected between the second end of the electromagnet (L2) and the grounding end, and is used to control the connection or disconnection between the second end of the electromagnet (L2) and the grounding end; The pull-in power supply positive pole connection control unit and the pull-in power supply grounding control unit are synchronously turned on or off according to the high voltage power supply control signal to the electromagnet.

3. The electromagnetic door lock control device without Hall proximity recognition according to claim 2, characterized in that: The pull-in power supply positive pole connection control unit comprises a PMOS tube (Q5), a first NMOS tube (Q7), a first resistor (R21), a second resistor (R27), a third resistor (R29) and a fourth resistor (R30); the positive pole of the high voltage power supply is connected to the source of the PMOS tube (Q5) and is connected to the gate of the PMOS tube (Q5) via the first resistor (R21); the drain of the PMOS tube (Q5) is connected to the first end of the electromagnet (L2); the gate of the PMOS tube (Q5) is connected to the drain of the first NMOS tube (Q7) via the second resistor (R27); the first NMOS tube The source of (Q7) is connected to the ground end, the gate of the first NMOS tube (Q7) is connected to the ground end via the fourth resistor (R30) and is connected to one end of the third resistor (R29), and the other end of the third resistor (R29) serves as a high-voltage power supply control port and is connected to the main control unit (400); the pull-in power supply grounding control unit includes a second NMOS tube (Q9), the second end of the electromagnet (L2) is connected to the drain of the second NMOS tube (Q9), the source of the second NMOS tube (Q9) is grounded, and the gate of the second NMOS tube (Q9) is connected to the gate of the first NMOS tube (Q7).

4. The electromagnetic door lock control device without Hall proximity recognition according to claim 1, characterized in that: The low voltage power-on detection control unit (200) comprises: a first diode (D11), having an anode connected to the positive electrode of the low voltage power supply and a cathode connected to the first end of the electromagnet (L2); a freewheeling diode (D13), a cathode connected to a first end of the electromagnet (L2), and an anode connected to a second end of the electromagnet (L2); a detection resistor (R34), connected between the second end of the electromagnet (L2) and the ground end, for detecting the voltage at the second end of the electromagnet (L2), the second end of the electromagnet (L2) serving as a detection signal port; The detection power supply control unit is connected between the second end of the electromagnet (L2) and the ground end, and is used to control the connection or disconnection between the second end of the electromagnet (L2) and the ground end.

5. The electromagnetic door lock control device without Hall proximity recognition according to claim 4, characterized in that: The detection power supply control unit comprises a third NMOS transistor (Q10) and a fifth resistor (R36), wherein the drain of the third NMOS transistor (Q10) is connected to the second end of the electromagnet (L2), the source of the third NMOS transistor (Q10) is connected to the ground end, and the gate of the third NMOS transistor (Q10) serves as a low-voltage power-on control port and is connected to the ground end via the fifth resistor (R36).

6. The electromagnetic door lock control device without Hall proximity recognition according to claim 4, characterized in that: The detection result output unit (300) comprises a comparator (U7), a sixth resistor (R36), a seventh resistor (R35), an eighth resistor (R34) and a ninth resistor (R37); the positive input terminal of the comparator (U7) is connected to one end of the sixth resistor (R36); the other end of the sixth resistor (R36) is connected to the detection signal port; the seventh resistor (R35) is connected in parallel between the positive input terminal and the output terminal of the comparator (U7); the output terminal of the comparator (U7) serves as the detection result port; the positive terminal of the low voltage power supply is connected to the negative input terminal of the comparator (U7) via the eighth resistor (R34); the negative input terminal of the comparator (U7) is connected to the ground terminal via the ninth resistor (R37); and the comparator (U7) is a hysteresis comparator.

7. The electromagnetic door lock control device without Hall proximity recognition according to claim 1, characterized in that: Also includes: a safety signal input unit (500), connected to the main control unit (400), and configured to input a received safety signal into the main control unit (400); a locking signal input unit (600), connected to the main control unit (400), and configured to input a received locking signal into the main control unit (400); as well as, An OSSD signal output unit (700), connected to the main control unit (400), and configured to output an OSSD signal received from the main control unit (400) to the outside; The main control unit (400) is further configured to make a comprehensive decision based on the safety signal received from the safety signal input unit (500), the lock signal received from the lock signal input unit (600), and the high level / low level signal received from the detection result output unit (300), and generate an OSSD signal to be sent to the OSSD signal output unit (700).

8. The electromagnetic door lock control device without Hall proximity recognition according to claim 1, characterized in that: It also includes an RFID identification unit (800), which is connected to the main control unit (400) and is used to identify the electronic tag on the matcher and determine whether the electronic tag is legal.

9. A method for controlling an electromagnetic door lock without Hall proximity recognition using a matching device, implemented using the electromagnetic door lock control device without Hall proximity recognition using a matching device according to any one of claims 1 to 8, comprising: The main control unit (400) provides a high-voltage power supply control signal to the high-voltage power supply control unit (100) to control the high-voltage power supply to stop supplying power to the electromagnet; The main control unit (400) provides a low-voltage power-on control signal to the electromagnet to the low-voltage power-on detection control unit (200), controls the electromagnet to be powered at a certain frequency through the low-voltage power supply, and synchronously detects the voltage at the electromagnet; The detection result output unit (300) converts the acquired detection signal into a high level / low level signal and sends it to the main control unit (400) to reflect whether the distance between the electromagnet of the electromagnetic door lock and the matcher is within a limited value.

10. An electric door lock comprising an electric door lock body and a matching device, wherein the electric door lock body is provided with an electromagnet and an electromagnetic door lock control device without Hall proximity recognition according to any one of claims 1 to 8.

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