Safety door lock and multipath radio frequency induction multiplexing detection method

Abstract

The invention discloses a safety door lock which is composed of a door lock sensor and a protective door operating piece. One base station chip is used for controlling time division multiplexing of the two RFID antennas, closing of the protective door is achieved, the position of a lock tongue of the protective door is detected at the same time, closing of the protective door is detected, after the lock tongue is inserted into the accurate position, an electromagnet is driven, and the electromagnet drives a lock catch to lock the lock tongue. And meanwhile, the position of an electromagnet push rod is detected through a groove type photoelectric switch, closed-loop detection is achieved, and therefore the high safety level of the locking function is achieved. In conclusion, the detection of the protective door and the lock tongue can reach a higher safety level, the cost can be effectively saved, and mutual interference is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of safety door lock, and particularly to a safety door lock and a multi-path radio frequency induction multiplexing detection method. BACKGROUND

[0002] In the application of industrial protective door, there is a safety door lock which adopts RFID radio frequency induction to protect the opening and closing of the door. When the protective door is closed, a door closing indication signal is outputted, and the door lock is waiting for the insertion of the lock tongue. When the lock tongue is inserted, the lock is opened, and a door locking indication signal is outputted. When the door lock cannot accurately and effectively detect the position of the lock tongue of the protective door, the lock is mistaken as being locked when the lock tongue is not completely inserted, which may cause the potential risk of the door being unable to be locked and the danger of the personnel. SUMMARY

[0003] The present application aims to provide a safety door lock and a multi-path radio frequency induction multiplexing detection method, and solve the problem that the door lock cannot accurately and effectively detect the position of the lock tongue of the protective door, and the lock is mistaken as being locked when the lock tongue is not completely inserted, which may cause the potential risk of the door being unable to be closed and the danger of the personnel. Through the detection device, the lock can be started only when the protective door is effectively closed and the lock tongue is effectively inserted, so as to ensure the safety of the personnel.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: A safety door lock is composed of a door lock inductor and a protective door operating element. The door lock inductor comprises: A lock body inductor logic processing unit MCU is used for controlling and detecting the base station antenna signal, controlling the SPDT switch switching and controlling the electromagnetic iron action, and monitoring the state of the slot photoelectricity. A radio frequency base station unit is used for modulating and driving the antenna and decoding the communication information coupled by the antenna. An inductor antenna S2 is used for realizing the inductive detection of the position of the lock tongue of the protective door. An inductor antenna S1 is used for realizing the inductive detection of the opening and closing state of the protective door. The protective door operating element comprises: A door lock inductor internal electromagnetic iron is used for driving the lock catch to lock the lock tongue. An operating element antenna T1 is installed close to the lock body direction and interacts with the inductor antenna S1. An operating element antenna T2 is installed on the lock tongue and interacts with the inductor antenna S2. An operating element lock tongue is inserted into the inductor lock body to realize the door locking.

[0005] A kind of multi-path radio frequency induction multiplexing detection method, when protective door is close, i.e. closes, inductor is inducted to door closing by inductor antenna S1, and output door closing auxiliary indicating signal;When the lock tongue of operating element is inserted into lock body, inductor is inducted to lock tongue insertion by inductor antenna S2, i.e. drive inductor internal electromagnet push rod, electromagnet push rod drives lock catch to realize the locking of lock tongue, the position of push rod is detected by internal slot photoelectric switch, to detect the state of electromagnet and realize closed loop, and synchronous output door locking auxiliary signal is output after locking.

[0006] Compared with prior art, the present application has the following advantages: the present application controls two groups of RFID antenna time-sharing multiplexing by a base station chip, which not only realizes the closing of protective door, but also detects the position of lock tongue of protective door, drives electromagnet after detecting that protective door is closed and lock tongue is inserted into accurate position, electromagnet drives lock catch to realize the locking of lock tongue, and the position of electromagnet push rod is detected by internal slot photoelectric switch, to realize closed loop detection, so as to realize high safety level of locking function. In summary, the present application can not only achieve higher safety level for detection of protective door and lock tongue, but also effectively save cost and avoid mutual interference. BRIEF DESCRIPTION OF DRAWINGS

[0007] Figure 1 It is the principle diagram of the present application.

[0008] Figure 2 It is the schematic diagram of the door lock device (lock tongue is not inserted) of the present application.

[0009] Figure 3 It is the schematic diagram of the door lock device (lock tongue is inserted) of the present application.

[0010] In the figure: 1, lock body inductor logic processing unit MCU, 2, radio frequency base station unit, 3, inductor antenna S2, 4, inductor antenna S1, 5, operating element antenna T1, 6, operating element antenna T2, 7, electromagnet, 8, operating element lock tongue. DETAILED DESCRIPTION

[0011] The present application will be further described in detail below in combination with the drawings and specific embodiments.

[0012] A safety door lock is composed of door lock inductor and protective door operating element; The door lock inductor includes: Lock body inductor logic processing unit MCU1 is used for controlling and detecting base station antenna signal, controlling SPDT switch switching and controlling electromagnet action, and monitoring the state of slot photoelectric switch; Radio frequency base station unit is used for modulating and driving antenna and decoding communication information coupled by antenna; Inductor antenna S2 3 is used for realizing inductive detection on the position of protective door lock tongue; The sensor antenna S1 4 is used to realize the inductive detection of the opening and closing state of the protective door. The protective door actuator comprises: The door lock sensor internal electromagnet 7 is used to drive the lock catch to lock the bolt; The actuator antenna T1 5 is installed close to the lock body direction and interacts with the sensor antenna S14; The actuator antenna T2 6 is installed on the bolt and interacts with the sensor antenna S2 3; The actuator bolt 8 is inserted into the sensor lock body to realize the door locking.

[0013] A multi-path radio frequency inductive multiplexing detection method, when the protective door is close, i.e. closed, the sensor detects the door closing through the sensor antenna S1, and outputs a door closing auxiliary indication signal; when the bolt of the actuator is inserted into the lock body, the sensor detects the insertion of the bolt through the sensor antenna S2, i.e. drives the electromagnet push rod, the electromagnet push rod drives the lock catch to lock the bolt, the position of the push rod is detected through the internal slot photoelectric switch, so as to detect the state of the electromagnet to realize a closed loop, and a door locking auxiliary signal is output simultaneously after locking. The sensor antenna S1 and the sensor antenna S2 are alternately cycled through the time division multiplexing mechanism, which can effectively avoid the mutual interference between the magnetic fields of the two groups of antennas, and can save a group of base station chips, thereby saving the cost.

[0014] The door lock sensor is composed of a radio frequency antenna unit, an electromagnet, a slot photoelectric switch, etc., the radio frequency antenna unit is controlled by a base station chip to alternately cycle two groups of antennas for inductive detection; The sensor antenna S1 and the sensor antenna S2 are switched by SPDT switches and controlled by an MCU; The sensor first detects the position of the protective door through the sensor antenna S1, when the protective door is closed, the base station detects the actuator antenna T1 through the sensor antenna S1, waits for the bolt to be inserted, and outputs a door closing indication signal simultaneously; When the bolt of the protective door is inserted into the lock body to the position, the base station detects the actuator antenna T2 through the sensor antenna S2, drives the push rod of the electromagnet to drive the lock catch to realize the locking function; The slot photoelectric switch in the sensor monitors the electromagnet push rod in real time, and the sensor monitors the state of the electromagnet through the slot photoelectric switch after the locking is opened.

[0015] The protective door actuator is mainly composed of two groups of radio frequency antenna units, the actuator antenna T1 cooperates with the transponder chip tag1 and the sensor, is placed close to the sensor, couples the energy of the sensor antenna S1 through the sensor antenna S1, and automatically sends the data in the memory of the transponder chip tag1 to the sensor to identify the opening and closing of the protective door after the energy is strong enough. The operating element antenna T2 cooperates with the transponder chip tag2 and the inductor, is placed at the bottom surface of the bolt, couples the energy of the inductor antenna S2 through the operating element antenna T2, and automatically sends the data in the memory of the transponder chip tag2 to the inductor to identify whether the bolt is inserted or not after the energy is strong enough; Through the detection method design, the locking function of the electromagnetic door lock can reach a higher safety protection level, is suitable for safety protection of personnel or machinery in industrial safety application places, reduces the risk of dangerous failure, avoids mutual interference of multiple radio frequency channels, and saves costs.

[0016] The above describes the preferred embodiment of the present application, and for those skilled in the art, according to the teaching of the present application, the changes, modifications, replacements and variations of the embodiments without departing from the principles and spirits of the present application still fall within the protection scope of the present application.

Claims

1. A security door lock characterised by, The door lock sensor and the protection door actuator are composed of; The door lock sensor comprises: The lock body sensor logic processing unit MCU is used for controlling and detecting the base station antenna signal, controlling the SPDT switch switching and controlling the electromagnet action, and monitoring the state of the slot photoelectricity; The radio frequency base station unit is used for modulating and driving the antenna and decoding the communication information coupled by the antenna; The sensor antenna S2 is used for realizing the inductive detection of the position of the protection door lock bolt; The sensor antenna S1 is used for realizing the inductive detection of the opening and closing state of the protection door; The protection door actuator comprises: The door lock sensor internal electromagnet is used for driving the lock catch to lock the bolt; The actuator antenna T1 is installed close to the lock body direction and interacts with the sensor antenna S1; The actuator antenna T2 is installed on the bolt and interacts with the sensor antenna S2; The actuator bolt is inserted into the sensor lock body to realize the door locking.

2. A method of multiplexed radio frequency inductive multiplexed detection, the method comprising: When the protection door is close, the sensor senses the door closing through the sensor antenna S1, and outputs the door closing auxiliary indication signal; when the bolt of the actuator is inserted into the lock body, the sensor senses the bolt insertion through the sensor antenna S2, that is, the sensor internal electromagnet push rod is driven, the electromagnet push rod drives the lock catch to realize the locking of the bolt, the position of the push rod is detected through the internal slot photoelectric switch, and the state of the electromagnet is detected to realize the closed loop, and the door locking auxiliary signal is outputted synchronously after the locking.

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