CN205894908U

CN205894908U - Control device of electromagnetic lock and electromagnetic lock

Info

Publication number: CN205894908U
Application number: CN201620780816.5U
Authority: CN
Inventors: 黄尚麟
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2016-07-22
Filing date: 2016-07-22
Publication date: 2017-01-18
Anticipated expiration: 2026-07-22

Abstract

The utility model discloses a controlling means and electromagnetic lock of electromagnetic lock, the device includes: the device comprises a driving unit (104), an electromagnetic induction unit (106) and a fault detection unit (108), wherein the fault detection unit (108) is used for acquiring a first feedback signal based on whether the electromagnetic induction unit (106) is blown or not before the driving unit (104) is electrified; the driving unit (104) is used for outputting a driving signal to the electromagnetic induction unit (106) when the electromagnetic induction unit (106) is not blown, namely is normal; the electromagnetic induction unit (106) is used for realizing locking and/or unlocking of the electromagnetic lock under the driving of the driving signal. The utility model discloses a scheme can overcome among the prior art defect that the protection dynamics is weak, the use is inconvenient and the reliability is poor, realizes that the protection dynamics is strong, convenient to use and good reliability's beneficial effect.

Description

Control device of electromagnetic lock and electromagnetic lock

Technical Field

The utility model belongs to the technical field of the security protection, concretely relates to controlling means and electromagnetic lock of electromagnetic lock especially relate to an electromagnetic lock fault detection and drive protection circuit, have electromagnetic lock and the control system of this circuit.

Background

The electromagnetic lock can utilize the principle of electromagnetism generation, and when current passes through a silicon steel sheet, the electromagnetic lock can generate strong suction to tightly suck an adsorption iron plate to achieve the effect of locking a door; when the access control system for controlling the power supply of the electromagnetic lock identifies that the personnel is correct, the power is cut off, and the electromagnetic lock can open the door after losing the suction force. A plurality of existing household electrical appliances need to use electromagnetic door locks due to the requirements of functionality and safety. However, the protection of the electromagnetic door lock is weak.

In the prior art, the defects of weak protection force, inconvenient use, poor reliability and the like exist.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to above-mentioned defect, provide a controlling means and electromagnetic lock of electromagnetic lock to solve the problem that the control dynamics of electromagnetic lock is weak among the prior art, reach the effect that promotes the protection dynamics.

The utility model provides a controlling means of electromagnetic lock, include: the fault detection unit is used for acquiring a first feedback signal based on whether the electromagnetic induction unit is blown or not before the driving unit is powered on; the driving unit is used for outputting a driving signal to the electromagnetic induction unit when the electromagnetic induction unit is not blown, namely is normal; the electromagnetic induction unit is used for realizing locking and/or unlocking of the electromagnetic lock under the driving of the driving signal.

Optionally, the failure detection unit is further configured to acquire a second feedback signal based on whether the driving signal is abnormal and/or whether the driving unit fails when the driving unit is powered on.

Optionally, the fault detection unit includes: an optical coupler; the optical coupler is used for taking a square wave signal with preset frequency as a first feedback signal when the electromagnetic induction unit is normal; when the electromagnetic induction unit is blown, a preset first high level signal is used as a first feedback signal when the electromagnetic induction unit is blown; and/or the optical coupler is further used for taking a second high level signal with a first preset duration as a second feedback signal when the driving signal is normal; and when the driving signal is abnormal and/or the driving unit fails, taking a third high level signal with a time length longer than a second preset time length as a second feedback signal when the driving signal is abnormal and/or the driving unit fails.

Optionally, the fault detection unit further includes: at least one of the current limiting and voltage dividing module and the filtering module; the current limiting and voltage dividing module is used for limiting and/or dividing the current and/or the voltage of the input side of the optical coupler; and/or the filtering module is used for filtering the voltage and/or the current at the input side of the optical coupler.

Optionally, the method further comprises: a controller; the controller is used for determining whether the electromagnetic induction unit is blown or not according to the first feedback signal; and/or the controller is further used for determining whether the driving signal is abnormal and/or whether the driving unit is in failure according to the second feedback signal; and/or the controller is also used for sending a locking and/or unlocking command to the driving unit when the electromagnetic induction unit is normal; correspondingly, the driving unit is used for receiving the command and outputting a driving signal corresponding to the command to the electromagnetic induction unit.

Optionally, the controller is further configured to output an alarm message and/or display a message when at least one of the electromagnetic induction unit is blown, the driving signal is abnormal, and the driving unit is failed is determined.

Optionally, the controller includes: at least one of MCU and singlechip.

Optionally, the method further comprises: a thermal protection unit; the thermal protection unit is used for blocking an electrifying loop where the electromagnetic induction unit is located when the time for the driving unit to output the driving signal is greater than at least one of preset time and driving unit failure.

Optionally, the thermal protection unit comprises: at least one of a thermistor and a fuse.

Optionally, wherein the driving unit includes: at least one of a relay and a thyristor; accordingly, the drive unit failure comprises: at least one of abnormal closing of the relay, adhesion of a relay contact and abnormal conduction of the silicon controlled rectifier; and/or, the electromagnetic induction unit comprises: a solenoid coil.

With the above device phase-match, the utility model discloses another aspect provides an electromagnetic lock, include: the control device of the electromagnetic lock is described above.

The utility model discloses a scheme is through on general electromagnetic door lock drive circuit's basis, increases the hot protection of PTC, can play the protection shut-off action to unusual drive signal, and then improves electromagnetic door lock drive circuit's reliability.

Further, the utility model discloses a scheme is through on general electromagnetic door lock drive circuit's basis, increases the unusual trouble closed loop detection circuitry of drive, can detect whether the solenoid of electromagnetic door lock breaks down, and then reduces the fault rate of electromagnetic door lock.

Further, the utility model discloses a scheme is through on general electromagnetic door lock drive circuit's basis, increases the hot protection of PTC, can also detect whether the adhesion takes place for relay or controllable silicon contact, and then detects electromagnetic door lock and drive circuit's abnormal fault state and be used for the trouble suggestion, and the reliability is higher, still is favorable to promoting user's use and experiences.

Therefore, the utility model discloses a scheme is through increasing the hot protection of PTC on general electromagnetic door lock drive circuit's basis, solves the problem that the control dynamics of electromagnetic lock is weak among the prior art to, overcome among the prior art that the protection dynamics is weak, use inconvenient and the poor defect of reliability, realize that the protection dynamics is strong, convenient to use and good reliability's beneficial effect.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention.

The technical solution of the present invention is further described in detail by the accompanying drawings and examples.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of a control device of an electromagnetic lock according to the present invention;

fig. 2 is a schematic structural diagram of another embodiment of the control device of the electromagnetic lock of the present invention;

fig. 3 is a schematic structural diagram of a control device of an electromagnetic lock according to still another embodiment of the present invention;

fig. 4 is a schematic structural diagram of an alternative embodiment of the control device of the electromagnetic lock of the present invention;

fig. 5 is a schematic structural diagram of another alternative embodiment of the control device of the electromagnetic lock of the present invention;

fig. 6 is a schematic view of an electromagnetic lock according to an embodiment of the present invention;

fig. 7 is a schematic diagram of an embodiment of a control system of an electromagnetic lock according to the present invention.

With reference to the accompanying drawings, the embodiments of the present invention have the following reference numerals:

100-a power supply; 102-a thermal protection unit; 104-a drive unit; 106-an electromagnetic induction unit; 108-a fault detection unit; 110-a controller.

Detailed Description

To make the purpose, technical solution and advantages of the present invention clearer, the following will combine the embodiments of the present invention and the corresponding drawings to clearly and completely describe the technical solution of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

According to the embodiment of the present invention, a control device of an electromagnetic lock is provided, as shown in fig. 1, the present invention is a schematic structural diagram of an embodiment of a control device of an electromagnetic lock. The control device of the electromagnetic lock may include: a drive unit 104, an electromagnetic induction unit 106, and a fault detection unit 108.

Optionally, the control device of the electromagnetic lock may further include: a power supply 100. For example: mains power may be used as the power supply 100.

In one embodiment, the fault detection unit 108 may be configured to obtain a first feedback signal based on whether the electromagnetic induction unit 106 is blown or not before the driving unit 104 is powered on.

For example: the solenoid detection circuit may be used to detect the state of the solenoid (i.e., the electromagnetic door lock solenoid L) before the normally open contact of the relay K1 is closed.

Therefore, whether the electromagnetic induction unit of the electromagnetic lock breaks down or not can be detected through the fault detection unit, and then corresponding processing can be carried out when the solenoid coil breaks down, so that the electromagnetic lock is protected more reliably and more safely.

In one embodiment, the driving unit 104 may be configured to output a driving signal to the electromagnetic induction unit 106 when the electromagnetic induction unit 106 is not blown, i.e., normal.

For example: when the MCU sends a door locking or unlocking instruction, a driving pulse output pin (namely a DR pin) of the relay K1 outputs a conducting signal (for example, a pulse signal with the period of 20-30 milliseconds) of a driving pulse, a coil of the relay K1 is electrified, and a normally open contact of the relay K1 is closed.

Alternatively, the driving unit 104 may include: at least one of a relay and a thyristor.

Accordingly, the failure of the drive unit 104 may include: and the abnormal actuation of the relay, the adhesion of the relay contact and the abnormal conduction of the silicon controlled rectifier.

For example: and the driving unit can be a relay or a silicon controller.

For example: a relay drive circuit.

Therefore, the electromagnetic induction unit is driven through the relay, the silicon controlled rectifier and the like, the driving mode is simple and convenient, and the reliability is high.

In one embodiment, the electromagnetic induction unit 106 may be configured to lock and/or unlock the electromagnetic lock under the driving of the driving signal.

For example: an electromagnetic induction unit of the electromagnetic lock is electrified (for example, the electromagnetic induction unit is electrified for 20-30 milliseconds), and the electromagnetic door lock is locked or unlocked through an internal structure of the electromagnetic door lock.

Optionally, the electromagnetic induction unit 106 may include: a solenoid coil.

For example: the solenoid L of the electromagnetic door lock can be seen in the example shown in fig. 6.

Therefore, electromagnetic induction is realized through the solenoid coil, the structure is simple, and the induction mode is safe and reliable.

In an optional embodiment, the failure detection unit 108 may be further configured to obtain a second feedback signal based on whether the driving signal is abnormal and/or whether the driving unit 104 fails when the driving unit 104 is powered on.

For example: when the normally open contact of relay K1 is closed, solenoid detection circuitry can be used to detect whether the relay contact is adhesion.

For example: for example: when a normally open contact of the relay K1 is closed, the optocoupler U1 is cut off.

For example: and detecting whether the relay or the controllable silicon contact is adhered or not.

Therefore, the fault detection unit is used for detecting the abnormal fault states of the electromagnetic door lock and the driving circuit for fault prompt, the abnormal driving signal can be protected and cut off, the reliability of the electromagnetic door lock driving circuit is improved, and the fault rate of the electromagnetic door lock is reduced.

Optionally, the fault detection unit 108 may include: and an optical coupler.

For example: in the positive half cycle of the commercial power, when the voltage of the commercial power is greater than a certain value (for example, a preset voltage value), the optocoupler U1 is switched on, and the feedback signal FB of the solenoid detection circuit is correspondingly pulled to a low level; conversely, the feedback signal FB is high, as shown in fig. 6.

In an optional example, the optical coupler may be configured to use a square wave signal with a preset frequency as a first feedback signal when the electromagnetic induction unit 106 is normal; and when the electromagnetic induction unit 106 is blown, taking a preset first high level signal as a first feedback signal when the electromagnetic induction unit 106 is blown.

For example: when the coil (i.e. the solenoid L of the electromagnetic door lock) is normal, the feedback signal FB of the solenoid detection circuit may be a square wave signal with a fixed frequency.

For example: the feedback signal FB of the solenoid detection circuit may be a fixed high signal when the coil (i.e., the solenoid L of the electromagnetic door lock) is blown.

In an optional example, the optocoupler may be further configured to, when the driving signal is normal, use a second high-level signal with a first preset duration as a second feedback signal when the driving signal is normal; and when the driving signal is abnormal and/or the driving unit 104 fails, taking a third high level signal with a time length longer than a second preset time length as a second feedback signal when the driving signal is abnormal and/or the driving unit 104 fails.

For example: when the pulse signal of the relay K1 is normal, the relay K1 can be turned on for only 20 to 30 milliseconds, and the feedback signal FB of the solenoid detection circuit can be at a high level of 20 to 30 milliseconds.

For example: when the pulse signal of the relay K1 is abnormal or the normally open contact of the relay K1 is stuck, the feedback signal FB can be at a high level which is more than 30 milliseconds and less than or equal to 300 milliseconds. For example: the minimum time for holding the high level may be determined by the loading time of the abnormal signal. For another example: the maximum time for which the high level is maintained may be determined according to the protection time of the PTC.

Therefore, fault detection is achieved through the optical coupler, the detection mode is simple, and the reliability of the detection result is high.

Optionally, the fault detection unit 108 may further include: at least one of the current limiting and voltage dividing module and the filtering module.

In an optional example, the current-limiting and voltage-dividing module may be configured to limit and/or divide a current and/or a voltage at an input side of the optical coupler.

For example: referring to the example shown in fig. 6, through the current limiting and voltage dividing effects of the resistor R20 and the resistor R21, the optocoupler U1 can be prevented from being broken down due to excessive input voltage and/or current.

In an optional example, the filtering module may be configured to filter a voltage and/or a current at an input side of the optical coupler.

For example: referring to the example shown in fig. 6, the capacitor C16 may perform a filtering function, and may perform filtering processing on the voltage and/or current input to the optocoupler U1, which is beneficial to improving the reliability of the operation of the optocoupler U1.

From this, through the current-limiting partial pressure and the filtration of current-limiting partial pressure module, filtering module etc. can promote the accurate nature and the reliability of opto-coupler work.

In an alternative embodiment, referring to the example shown in fig. 2, the method may further include: a controller 110.

In an alternative example, the controller 110 may be configured to determine whether the electromagnetic induction unit 106 is blown or not according to the first feedback signal.

For example: the MCU can judge whether the electromagnetic door lock has a fault or not by detecting the feedback signal FB.

In an optional example, the controller 110 may be further configured to determine whether the driving signal is abnormal and/or whether the driving unit 104 is failed according to the second feedback signal.

For example: the MCU judges whether the pulse signal is abnormal or the relay contact is adhered by detecting the feedback signal FB.

In an optional example, the controller 110 may be configured to send a lock and/or unlock command to the driving unit 104 when the electromagnetic induction unit 106 is normal.

Accordingly, the driving unit 104 may be configured to receive the command and output a driving signal corresponding to the command to the electromagnetic induction unit 106.

For example: when the MCU issues a door locking or unlocking command, the driving pulse output pin (i.e., DR pin) of the relay K1 outputs a conducting signal of the driving pulse.

Therefore, the controller is combined with the fault detection unit to detect and control the fault, the reliability of fault detection can be improved better and more safely, and the user experience is good.

In an optional example, the controller 110 may be further configured to output an alarm message and/or display a message when at least one of the electromagnetic induction unit 106 is blown, the driving signal is abnormal, and the driving unit 104 is failed is determined.

For example: can be used for fault indication.

Therefore, the user can be prompted to intervene and maintain the electromagnetic lock in time through prompting the fault detection result, the safety is higher, and the humanization is good.

Optionally, the controller 110 may include: at least one of MCU and singlechip.

From this, through the controller of multiple forms such as MCU, singlechip, can promote the application range and the flexibility of using of electromagnetic lock, it is better to use the convenience.

In an alternative embodiment, referring to the example shown in fig. 3, the method may further include: a thermal protection unit 102.

In an optional example, the thermal protection unit 102 may be configured to block an energization loop in which the electromagnetic induction unit 106 is located when at least one of a time when the driving unit 104 outputs the driving signal is greater than a preset time and a failure of the driving unit 104.

For example: when the time of the relay K1 outputting the driving pulse (i.e., the pulse signal) is too long, or the normally open contact of the relay K1 is abnormally attracted (e.g., the normally open contact of the relay K1 is abnormally attracted when stuck due to a fault), the PTC generates heat to be in a high resistance state, and cuts off the current of the energizing loop of the solenoid (i.e., the electromagnetic door lock solenoid L), so as to prevent the solenoid (i.e., the electromagnetic door lock solenoid L) from being burnt, as shown in fig. 6.

From this, through hot protection unit, can protect the solenoid of electromagnetic lock, and then protect the electromagnetic lock, be favorable to improving the security of electromagnetic lock work.

Optionally, the thermal protection unit 102 may include: at least one of a thermistor and a fuse.

For example: a PTC thermistor.

Therefore, through the thermistor, the sensitivity and the accuracy of thermal protection can be improved, and the user experience is good.

In addition, during actual use, the units or the equipment can be selectively used in the control device of the electromagnetic lock according to actual requirements.

In an alternative example, referring to the example shown in fig. 4, the control device of the electromagnetic lock may include: a power supply 100, a thermal protection unit 102, a drive unit 104, an electromagnetic induction unit 106, and a fault detection unit 108.

For example: the electromagnetic induction unit 106 may be protected by the thermal protection unit 102.

For example: the drive signal and/or the drive unit 104 can be protected by the fault detection unit 108. In the protection process of the driving signal and/or the driving unit 104, the corresponding feedback signal obtained by the fault detection unit 108 may be manually determined or determined by means of other convenient instruments or devices, and the convenience in use is better.

In another alternative example, referring to the example shown in fig. 5, the control device of the electromagnetic lock may include: a power supply 100, a thermal protection unit 102, a drive unit 104, and an electromagnetic induction unit 106.

For example: in some electromagnetic locks only needing thermal protection, only the thermal protection unit 102 is used for thermal protection, so that the reliability of the thermal protection of the control device of the electromagnetic lock is ensured; on the other hand, the circuit structure of the control device of the electromagnetic lock is simplified, the hardware cost is saved, and the working reliability of the electromagnetic lock is also improved.

Therefore, the use convenience of a user can be improved and the use range of the electromagnetic lock is expanded by optionally flexibly adjusting and using.

Through a large number of tests, the technical scheme of the embodiment is adopted, and PTC thermal protection is added on the basis of a common electromagnetic door lock driving circuit, so that the abnormal driving signal can be protected and cut off, and the reliability of the electromagnetic door lock driving circuit is further improved.

According to the utility model discloses an embodiment still provides an electromagnetic lock corresponding to the controlling means of electromagnetic lock. The electromagnetic lock may include: the control device of the electromagnetic lock is described above.

In one embodiment, an electromagnetic lock (e.g., an electromagnetic door lock) may include a power supply 100, a drive unit 104, and an electromagnetic induction unit 106. The drive circuit of the electromagnetic lock (such as an electromagnetic door lock) adopts an open-loop control mode, namely, a pulse signal is used for controlling the on-off of a relay or a contact of a silicon controller, so that a solenoid coil of the electromagnetic door lock is powered on and off, and the functions of locking and unlocking are achieved. Such a drive circuit for open-loop control has no protection means for an abnormal signal, and has no function of detecting and judging whether or not the solenoid of the electromagnetic door lock is broken.

In one embodiment, an electromagnetic lock is added with a thermal protection unit 102 and a fault detection unit 108.

For example: referring to the example shown in fig. 6, the electromagnetic lock may include: a power supply (e.g., commercial power) 100, a thermal protection unit (e.g., PTC thermistor) 102, a driving unit (e.g., relay driving circuit) 104, an electromagnetic induction unit (e.g., solenoid L of electromagnetic door lock) 106, a fault detection unit (e.g., solenoid detection circuit) 108, and a controller (e.g., MCU) 110. Wherein, AC _ L represents the live wire of the commercial power, AC _ N represents the zero wire of the commercial power, and Detec represents the detection point of the fault detection unit 108.

In one embodiment, the relay driving circuit may include: relay K1 and diode D15.

For example: the diode D15 may be a freewheeling diode.

For example: when the MCU sends a door locking or unlocking instruction, a driving pulse output pin (namely a DR pin) of the relay K1 outputs a conducting signal (for example, a pulse signal with a period of 20-30 milliseconds) of a driving pulse, a coil of the relay K1 is electrified, a normally open contact of the relay K1 is closed, a solenoid L of the electromagnetic door lock is electrified (for example, the electromagnetic door lock is electrified for 20-30 milliseconds), and the electromagnetic door lock is locked or unlocked through the internal structure of the electromagnetic door lock.

In one embodiment, the thermal protection unit 102 may include: a positive temperature coefficient thermistor (i.e., PTC).

In one example, when the relay K1 outputs a driving pulse (i.e., a pulse signal) for too long or the normally open contact of the relay K1 is abnormally closed (e.g., abnormal closing when the normally open contact of the relay K1 is stuck due to a fault), the PTC generates heat to assume a high resistance state, and cuts off the current of the energized loop of the solenoid (i.e., the electromagnetic door lock solenoid L), thereby preventing the solenoid (i.e., the electromagnetic door lock solenoid L) from being burnt.

In one embodiment, the solenoid detection circuit may include: the circuit comprises a resistor R19, a resistor R20, a resistor R21, a resistor R24, an optocoupler U1, a capacitor C12, a capacitor C16 and a diode D2.

For example: diode D2, can be the clamping diode, can be through the mode of voltage clamp, protection opto-coupler U1.

For example: the resistor R19 and the resistor R20 may be current limiting resistors.

For example: the capacitor C12 may be a filter capacitor.

In one example, a solenoid detection circuit may be used to detect the state of the solenoid (i.e., solenoid latch solenoid L) before the normally open contact of relay K1 is closed.

For example: in the positive half cycle of the commercial power, when the voltage of the commercial power is greater than a certain value (for example, a preset voltage value), the optocoupler U1 is switched on, and the feedback signal FB of the solenoid detection circuit is correspondingly pulled to a low level; conversely, the feedback signal FB is high.

For example: through the current limiting and voltage dividing effects of the resistor R20 and the resistor R21, the optocoupler U1 can be prevented from being broken down due to overlarge input voltage and/or current.

For example: the capacitor C16 can play a filtering role, can filter the voltage and/or current of the input optocoupler U1, and is favorable for improving the working reliability of the optocoupler U1.

Alternatively, the feedback signal FB of the solenoid detection circuit may be a square wave signal of a fixed frequency when the coil (i.e., the solenoid lock solenoid L) is normal.

Alternatively, the feedback signal FB of the solenoid detection circuit may be a fixed high signal when the coil (i.e., the solenoid L) is blown.

At the moment, the MCU can judge whether the electromagnetic door lock has a fault or not by detecting the feedback signal FB.

In one example, a solenoid detection circuit may be used to detect whether the relay contacts are stuck when the normally open contact of relay K1 is closed.

For example: when a normally open contact of the relay K1 is closed, the optocoupler U1 is cut off.

Alternatively, when the pulse signal of the relay K1 is normal, the relay K1 can be conducted for only 20-30 ms, and the feedback signal FB of the solenoid detection circuit can be at a high level of 20-30 ms.

Alternatively, when the pulse signal of the relay K1 is abnormal or the normally open contact of the relay K1 is stuck, the feedback signal FB may be at a high level of > 30 milliseconds and ≦ 300 milliseconds.

For example: the minimum time for holding the high level may be determined by the loading time of the abnormal signal. For example: the protection time of the type-selection PTC is 300ms for continuous loading, and if an abnormal signal is loaded for 100ms, the high-level holding time is 100 ms.

For example: the maximum time for which the high level is maintained may be determined according to the protection time of the PTC. For example: the protection time of the type-selection PTC is that the loop current is cut off after the continuous loading is carried out for 300ms, and the maximum time for keeping the high level is 300 ms.

At the moment, the MCU judges whether the pulse signal is abnormal or the relay contact is adhered by detecting the feedback signal FB.

Since the processes and functions implemented by the electromagnetic lock of this embodiment substantially correspond to the embodiments, principles and examples of the apparatus shown in fig. 1 to 5, the description of this embodiment is not detailed, and reference may be made to the related descriptions in the foregoing embodiments, which are not repeated herein.

Through a large amount of tests verification, adopt the technical scheme of the utility model, on through the basis at general electromagnetic door lock drive circuit, increase drive abnormal fault closed loop detection circuitry, whether the solenoid that can detect electromagnetic door lock breaks down, and then reduce electromagnetic door lock's fault rate.

According to the embodiment of the present invention, there is also provided a control system of an electromagnetic lock corresponding to the electromagnetic lock, as shown in fig. 7, the schematic diagram of an embodiment of the system of the present invention. The control system of the electromagnetic lock may include:

at step S110, before the driving unit 104 of the electromagnetic lock described above is powered on, a first feedback signal based on whether the electromagnetic induction unit 106 is blown or not is acquired.

At step S120, when the electromagnetic induction unit 106 is not blown, i.e., normal, a driving signal is output to the electromagnetic induction unit 106.

At step S130, the electromagnetic lock is locked and/or unlocked under the driving of the driving signal.

In an alternative embodiment, the method may further include: when the driving unit 104 is powered on, a second feedback signal based on whether the driving signal is abnormal and/or whether the driving unit 104 is faulty is acquired.

In an alternative embodiment, the method may further include: and processing according to the first feedback signal and/or the second feedback signal.

In one example, it is determined whether the electromagnetic induction unit 106 is blown based on the first feedback signal.

In one example, it is determined whether the drive signal is abnormal and/or the drive unit 104 is malfunctioning based on the second feedback signal.

In one example, when the electromagnetic induction unit 106 is normal, a lock and/or unlock command is sent to the drive unit 104.

Accordingly, the command is received by the driving unit 104, and a driving signal corresponding to the command is output to the electromagnetic induction unit 106.

In an alternative embodiment, the method may further include: when the time for the driving unit 104 to output the driving signal is greater than at least one of the preset time and the driving unit 104 fails, the power-on loop where the electromagnetic induction unit 106 is located is blocked.

Since the processing and functions implemented by the system of this embodiment substantially correspond to the embodiment, the principle and the example of the electromagnetic lock shown in fig. 6, the description of this embodiment is not given in detail, and reference may be made to the related description in the foregoing embodiment, which is not repeated herein.

Through a large amount of experimental verifications, adopt the technical scheme of the utility model, on through the basis at general electromagnetic door lock drive circuit, increase the hot protection of PTC, can also detect whether the adhesion takes place for relay or controllable silicon contact, and then detect electromagnetic door lock and drive circuit's abnormal fault state, the reliability is higher, still is favorable to promoting user's use and experiences.

In summary, it is readily understood by those skilled in the art that the advantageous modes described above can be freely combined and superimposed without conflict.

The above description is only an example of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A control device of an electromagnetic lock is characterized by a driving unit (104), an electromagnetic induction unit (106) and a fault detection unit (108), wherein,

the fault detection unit (108) is used for acquiring a first feedback signal based on whether the electromagnetic induction unit (106) is blown or not before the driving unit (104) is electrified;

the driving unit (104) is used for outputting a driving signal to the electromagnetic induction unit (106) when the electromagnetic induction unit (106) is not blown, namely is normal;

the electromagnetic induction unit (106) is used for realizing locking and/or unlocking of the electromagnetic lock under the driving of the driving signal.

2. The device according to claim 1, wherein the failure detection unit (108) is further configured to obtain a second feedback signal based on whether the driving signal is abnormal and/or whether the driving unit (104) is failed when the driving unit (104) is powered on.

3. The apparatus according to claim 2, wherein the fault detection unit (108) comprises: an optical coupler;

the optical coupler is used for taking a square wave signal with a preset frequency as a first feedback signal when the electromagnetic induction unit (106) is normal; when the electromagnetic induction unit (106) is blown, a preset first high-level signal is used as a first feedback signal when the electromagnetic induction unit (106) is blown; and/or the presence of a gas in the gas,

the optical coupler takes a second high-level signal with a first preset time length as a second feedback signal when the driving signal is normal; and taking a third high level signal with a time length longer than a second preset time length as a second feedback signal when the driving signal is abnormal and/or the driving unit (104) is in failure.

4. The apparatus of claim 3, wherein the fault detection unit (108) further comprises: at least one of the current limiting and voltage dividing module and the filtering module; wherein,

the current limiting and voltage dividing module is used for limiting and/or dividing the current and/or the voltage of the input side of the optical coupler; and/or the presence of a gas in the gas,

and the filtering module is used for filtering the voltage and/or current at the input side of the optical coupler.

5. The apparatus of any of claims 2-4, further comprising: a controller (110);

the controller (110) is used for determining whether the electromagnetic induction unit (106) is blown or not according to the first feedback signal; and/or the presence of a gas in the gas,

the controller (110) is further used for determining whether the driving signal is abnormal and/or whether the driving unit (104) is in failure according to the second feedback signal; and/or the presence of a gas in the gas,

the controller (110) is further configured to send a locking and/or unlocking command to the driving unit (104) when the electromagnetic induction unit (106) is normal;

correspondingly, the driving unit (104) is used for receiving the command and outputting a driving signal corresponding to the command to the electromagnetic induction unit (106).

6. The apparatus of claim 5, wherein the controller (110) is further configured to output an alarm message and/or display a message when at least one of a blow of the electromagnetic induction unit (106), an abnormality of the driving signal, and a malfunction of the driving unit (104) is determined.

7. The apparatus of claim 5, wherein the controller (110) comprises: at least one of MCU and singlechip.

8. The apparatus according to one of claims 2 to 4, wherein,

the drive unit (104) comprising: at least one of a relay and a thyristor;

accordingly, the drive unit (104) fails, comprising: at least one of abnormal closing of the relay, adhesion of a relay contact and abnormal conduction of the silicon controlled rectifier;

and/or the presence of a gas in the gas,

the electromagnetic induction unit (106) comprising: a solenoid coil.

9. The apparatus of any of claims 1-4, further comprising: a thermal protection unit (102);

the thermal protection unit (102) is used for blocking an electrifying loop where the electromagnetic induction unit (106) is located when the time for the driving unit (104) to output the driving signal is greater than at least one of preset time and the driving unit (104) has a fault.

10. The device according to claim 9, characterized in that said thermal protection unit (102) comprises: at least one of a thermistor and a fuse.

11. An electromagnetic lock, comprising: a control device for an electromagnetic lock as claimed in any one of claims 1 to 10.