Multifunctional gating real-time control system based on RF encryption multi-frequency processing circuit

Abstract

The utility model discloses a multifunctional gating real-time control system based on an RF (Radio Frequency) encryption multi-frequency processing circuit, which relates to the field of gating systems and comprises an MCU (Microprogrammed Control Unit) central processing circuit, the RF encryption multi-frequency processing circuit and a power supply circuit, the RF encryption multi-frequency processing circuit is in communication connection with communication equipment with an RF transceiving function so as to receive and send RF signals with different frequencies, and is connected with the MCU central processing circuit so as to transmit configuration commands or data; a communication encryption module is arranged in the MCU central processing circuit; the MCU central processing circuit is connected with the execution mechanism so as to control door opening and closing through signal instructions. And the power supply circuit is respectively connected with the MCU central processing circuit and the RF encryption multi-frequency processing circuit to supply power. According to the utility model, the communication encryption function and the multi-frequency conversion capability of the RF encryption multi-frequency circuit are combined, so that the flexibility, the compatibility and the safety are improved, and the possibility of door opening and closing operation by mistake is reduced.

Description

Technical Field

[0001] The utility model relates to the field of door control systems, in particular to a multifunctional door control real-time control system based on an RF encryption multi-frequency processing circuit. Background Art

[0002] With the advancement of technology, smart access control systems have sprung up like mushrooms after rain, and the requirements for the safety and reliability of smart access control products are becoming increasingly stringent. Due to the diversity and uncertainty of field environments, in actual use, the opening and closing control of smart access control products must not cause problems such as duplicate codes and false openings. The access control products must be absolutely safe and cannot open or close by mistake. Existing older access control products lack RF encryption and support for simultaneous multi-frequency conversion to ensure security and reduce false opening and closing operations. To meet this demand, it is imperative to expand and improve older products to ensure a qualitative leap in safety, reliability, and practicality to meet diverse market demands. Utility Model Content

[0003] In response to the above problems, the utility model proposes a multifunctional door control real-time control system based on an RF encryption multi-frequency processing circuit. It adopts an RF encryption multi-frequency processing circuit that supports RF signals of multiple frequencies, and the MCU central processing circuit has a built-in communication encryption module, which increases flexibility, compatibility and security while reducing the possibility of accidental door opening and closing operations.

[0004] A multifunctional gate control real-time control system based on RF encryption multi-frequency processing circuit, including MCU central processing circuit, RF encryption multi-frequency processing circuit and power supply circuit;

[0005] The RF encryption multi-frequency processing circuit is connected to a communication device with an RF transceiver function to receive and send RF signals of different frequencies, and is connected to the MCU central processing circuit to transmit configuration commands or data;

[0006] The MCU central processing circuit has a built-in communication encryption module and is connected to the actuator to control the opening and closing of the door;

[0007] The power supply circuit is connected to the MCU central processing circuit and the RF encryption multi-frequency processing circuit respectively to provide power.

[0008] Preferably, the RF encryption multi-frequency processing circuit includes an RF chip, a matching network and an RF transceiver antenna; the RF chip is connected to the MCU central processing circuit; the RF chip is connected to the matching network; and the matching network is connected to the communication device through the RF transceiver antenna.

[0009] Preferably, the RF chip includes an SPI port, a PA port, an RFIN port and an RFIP port; the RF chip is connected to the MCU central processing circuit through the SPI port; the RF chip is connected to the matching network through the PA port, the RFIN port and the RFIP port.

[0010] Preferably, the model of the RF chip is CMT2300A.

[0011] Preferably, the RF chip supports an RF signal frequency range of 127 MHz to 1020 MHz.

[0012] Preferably, the modulation and demodulation modes supported by the RF chip include OOK, FSK, GFSK, MSK or GMSK.

[0013] Preferably, the matching network includes a PA matching network for sending signals and an RX balun matching network for receiving signals.

[0014] Preferably, the communication device with RF transceiver function includes a remote controller.

[0015] Preferably, the power supply circuit includes a mains power supply circuit, a DC-DC conversion circuit for seamless switching between mains power and storage power, a storage battery charging management circuit and a storage power supply circuit; the mains power supply circuit is connected to the AC mains, the storage battery charging management circuit and the DC-DC conversion circuit for seamless switching between mains power and storage power, converts the AC mains power into a first direct current and provides it to the storage battery charging management circuit and the DC-DC conversion circuit for seamless switching between mains power and storage power; the storage battery charging management circuit is connected to the storage power supply circuit to charge the storage battery in the storage power supply circuit; the storage power supply circuit is connected to the AC mains and the DC-DC conversion circuit for seamless switching between storage power to provide a second direct current.

[0016] Preferably, the DC-DC conversion circuit for seamless switching between mains power and power storage includes two diodes, the anodes of the two diodes are respectively connected to the output end of the mains power supply circuit and the output end of the power storage supply circuit, and the cathodes of the two diodes are connected to each other, serving as the DC input end of the DC-DC conversion circuit for seamless switching between mains power and power storage.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] (1) The RF encryption multi-frequency processing circuit of the present invention supports the reception and transmission of RF signals in a wide frequency range of 127MHz to 1020MHz, and supports multiple modulation and demodulation modes. By setting the register configuration of the CMT2300A chip in the RF encryption multi-frequency processing circuit, the corresponding frequency and modulation and demodulation mode can be selected according to different application requirements. While having flexibility and compatibility, it can avoid interference on specific frequencies, help maintain communication stability and reliability, and thus indirectly improve security;

[0019] (2) The MCU central processing circuit of the utility model has a built-in communication encryption module, which provides data encryption and decryption functions, is not easy to be cracked, improves security, and reduces the possibility of accidental door opening and closing operations;

[0020] (3) The present invention can optimize the output power transmission efficiency by setting the PA matching network of the RF encryption multi-frequency processing circuit;

[0021] (4) The power supply circuit of the present invention can realize seamless switching from mains power to storage power in the event of a mains power outage, ensuring a certain amount of standby operation time in the event of a power outage to maintain the safety of the door control system;

[0022] (5) The RF encryption multi-frequency processing circuit of the present invention adopts the CMT2300A chip, which has the characteristics of low power consumption and high performance;

[0023] (6) The receiver and transmitter of the RF encryption multi-frequency processing circuit of the present invention adopt a two-in-one integrated design, which simplifies the circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention is further described in detail below with reference to the accompanying drawings;

[0025] Figure 1 This is a hardware system block diagram of a multifunctional gate-controlled real-time control system based on an RF encryption multi-frequency processing circuit according to an embodiment of the present invention;

[0026] Figure 2 This is a diagram of an RF encryption multi-frequency processing circuit of a multifunctional gated real-time control system based on an RF encryption multi-frequency processing circuit according to an embodiment of the present invention;

[0027] Figure 3 This is a DC-to-DC circuit diagram for seamless switching between mains power and stored power in a multifunctional gated real-time control system based on an RF encrypted multi-frequency processing circuit according to an embodiment of the utility model. DETAILED DESCRIPTION

[0028] The present invention is further described below through specific implementation methods.

[0029] See also Figure 1 As shown, an embodiment of the utility model discloses a multifunctional gated real-time control system based on an RF encrypted multi-frequency processing circuit, comprising an MCU (Microcontroller Unit) central processing circuit 1, an RF (Radio Frequency) encrypted multi-frequency processing circuit 2 and a power supply circuit.

[0030] The MCU central processing circuit 1 is the circuit that centrally calculates and controls the entire hardware system and processes data transmission and reception. The MCU central processing circuit 1 connects and communicates with the RF encryption multi-frequency processing circuit 2 via the SPI port. The MCU central processing circuit 1 has a built-in communication encryption module that provides data encryption and decryption functions. The communication signal is encrypted and a key is set to ensure that the data instructions are not easily cracked during transmission and reception processing.

[0031] The RF encryption multi-frequency processing circuit 2 communicates with a communication device with RF transceiver function to receive and send RF signals of different frequencies; and connects and communicates with the MCU central processing circuit through the SPI port to transmit configuration commands or data.

[0032] See also Figure 2 Specifically, the RF encryption multi-frequency processing circuit 2 uses a CMT2300A RF chip, which supports an RF signal frequency range of 127MHz to 1020MHz. By setting the register configuration of the CMT2300A chip in the RF encryption multi-frequency processing circuit 2, the corresponding frequency (127 to 1020MHz) and modulation and demodulation mode can be selected according to different application requirements. It also supports OOK (On-Off Keying), FSK (Frequency-Shift Keying), GFSK (Gaussian Frequency-Shift Keying), MSK (Minimum Shift Keying), and GMSK (Gaussian Minimum Shift Keying) modulation and demodulation modes. The data encoding method uses the NRZ (Non Return to Zero) format, Manchester, data whitening codec, and FEC (Forward Error Correction). The RF encryption multi-frequency processing circuit 2 of this embodiment uses the CMT2300A chip, which has the advantages of ultra-low power consumption and high performance. At the same time, support for multiple frequencies can avoid interference on specific frequencies, help maintain communication stability and reliability, and thus indirectly improve security.

[0033] See also Figure 2As shown, the matching network of the RF encryption multi-frequency processing circuit of this embodiment includes a PA (Power Amplifier) matching network, which is used to send RF signals. The PA matching network is connected to the PA port of the RF chip, wherein 2C1 is a DC blocking capacitor, 2L2, 2L3 and C2 constitute a TX matching network, 2L4, 2L5 and 2C3 constitute a T-type low-pass filter matching network, and the T-type low-pass filter matching network is connected to the RF transceiver antenna; by adjusting the component parameters of the PA matching network, the transmission efficiency can be optimized under the required output power to meet the needs of different application scenarios.

[0034] The matching network in the RF encryption multi-frequency processing circuit 2 of this embodiment includes 2L6, 2C7, 2L7, 2L8, and 2C6, forming an RX balun matching network for receiving RF signals. The RX balun matching network is connected to the RF chip's differential input ports RFIP and RFIN, respectively. After the RF transceiver antenna receives the signal, the signal passes through the RX balun matching network, ensuring that the signals entering RFIP and RFIN have equal amplitudes and a 180-degree phase difference. The RF encryption multi-frequency processing circuit 2 of this embodiment integrates a receiver and transmitter into one, and this integrated design facilitates circuit simplification.

[0035] In this embodiment, data exchange between the RF encryption multi-frequency processing circuit 2 and the MCU central processing circuit 1 is carried out via a 4-wire SPI port. Specifically, the four SPI ports included in the CMT2300A chip are CSB, FCSB, SCLK, and SDIO. The active-low CSB is the chip select signal for accessing registers; the active-low FCSB is the chip select signal for accessing the FIFO; CSB and FCSB cannot be set to low at the same time; SCLK is the serial port clock, with a maximum speed of 5MHz. For both the chip itself and the external MCU, data is sent on the falling edge of SCLK and collected on the rising edge. SDIO is a bidirectional pin used for data input and output; both address and data are transmitted starting with the MSB (Most Significant Bit).

[0036] The power supply circuit includes a mains power supply circuit 3, a storage battery charging management circuit 4, a storage battery supply circuit 5, and a DC-DC converter circuit 6 for seamless switching between mains power and storage battery.

[0037] See also Figure 1 and Figure 3As shown, specifically, AC mains 11 (this embodiment uses AC 220V) is connected to the mains supply circuit 3 to generate DC 32V, which is then connected to the mains and storage power seamless switching DC-to-DC circuit 6 through a diode (9D3); the DC power (DC20V to DC27V) generated by the storage power supply circuit 5 is connected to the mains and storage power seamless switching DC-to-DC circuit 6 through a diode (9D4); the cathodes of the two diodes are connected to each other, serving as DC input terminals; because the DC voltage output by the mains supply circuit 3 is higher than the DC voltage output by the storage power supply circuit 5, the mains supply is used first when mains power is available, and seamlessly switches to the storage power supply (using the DC power in the storage battery) when mains power is not available. The mains and storage power seamless switching DC-to-DC circuit 6 converts the input DC voltage into a DC voltage that meets the requirements of each circuit in the system, providing DC power for the system's MCU central processing circuit 6, RF encryption multi-frequency processing circuit 2, and other circuits. The battery charging management circuit 4 connects the mains supply circuit 3 and the battery storage circuit 5, and performs capacity detection on the battery storage circuit 5. When the battery storage circuit 5 needs to be charged, the mains supply circuit 5 is used to charge the battery storage circuit 5. This utility model enables seamless switching from mains power to battery storage during a mains power outage, ensuring a certain amount of backup operating time during a power outage and maintaining the security of the door control system.

[0038] The communication device with RF transceiver functionality in this embodiment is a dedicated remote control 14. The signal frequency of the dedicated remote control 14 is within the frequency range supported by the RF encryption multi-frequency processing circuit. The RF encryption multi-frequency processing circuit 2 automatically matches the frequency of the signal received from the dedicated remote control 14. The signal transmitted by the dedicated remote control 14 is received and processed by the RF encryption multi-frequency processing circuit 2 (including demodulation to extract the signal) and transmitted to the MCU central processing circuit 1. The central processing circuit 1 performs operations including decryption and data verification on the transmitted signal and, after the signal is verified, performs corresponding operations, such as controlling the opening and closing of a door. Conversely, the MCU central processing circuit 1 processes the signal to be transmitted (including modulation) through the RF encryption multi-frequency processing circuit 2 and transmits the signal to the dedicated remote control 14.

[0039] This embodiment also includes a mains detection circuit 7, a wireless communication circuit 9, an inverter switch circuit 8, and a motor interface circuit 10, which are respectively connected to the MCU central processing circuit 1; wherein the mains detection circuit 7 detects the mains status and feeds back to the MCU central processing circuit 1; the inverter switch circuit 8 receives instructions from the MCU central processing circuit and controls the inverter circuit 12 (which converts the DC power in the power storage supply circuit 5 into AC power to power the motor 13); the motor interface circuit 10 communicates with the MCU instructions and controls the motor 13 (the actuator for opening and closing the door); the MCU central processing circuit 1 communicates with the wireless communication device through the wireless communication circuit 9, and the supported communication protocols include 4G and WIFI.

[0040] The above is only a specific implementation method of the present invention, but the design concept of the present invention is not limited to this. Any non-substantial changes to the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. A multifunctional gated real-time control system based on RF encryption multi-frequency processing circuit, characterized in that: Including MCU central processing circuit, RF encryption multi-frequency processing circuit and power supply circuit; The RF encryption multi-frequency processing circuit is connected to a communication device with an RF transceiver function to receive and send RF signals of different frequencies, and is connected to the MCU central processing circuit to transmit configuration commands or data; The MCU central processing circuit has a built-in communication encryption module and is connected to the actuator to control the opening and closing of the door; The power supply circuit is connected to the MCU central processing circuit and the RF encryption multi-frequency processing circuit respectively to provide power.

2. The multifunctional gate control real-time control system based on RF encryption multi-frequency processing circuit according to claim 1 is characterized in that: The RF encryption multi-frequency processing circuit includes an RF chip, a matching network and an RF transceiver antenna; the RF chip is connected to the MCU central processing circuit; the RF chip is connected to the matching network; and the matching network is connected to the communication device through the RF transceiver antenna.

3. The multifunctional gate control real-time control system based on RF encryption multi-frequency processing circuit according to claim 2 is characterized in that: The RF chip includes an SPI port, a PA port, an RFIN port and an RFIP port; the RF chip is connected to the MCU central processing circuit through the SPI port; the RF chip is connected to the matching network through the PA port, the RFIN port and the RFIP port.

4. The multifunctional gate control real-time control system based on RF encryption multi-frequency processing circuit according to claim 2 is characterized in that: The model of the RF chip is CMT2300A.

5. The multifunctional gate control real-time control system based on RF encryption multi-frequency processing circuit according to claim 2 is characterized in that: The RF chip supports an RF signal frequency range of 127 MHz to 1020 MHz.

6. The multifunctional gate control real-time control system based on RF encryption multi-frequency processing circuit according to claim 2 is characterized in that: The modulation and demodulation modes supported by the RF chip include OOK, FSK, GFSK, MSK or GMSK.

7. The multifunctional gate control real-time control system based on RF encryption multi-frequency processing circuit according to claim 2 is characterized in that: The matching network includes a PA matching network for transmitting signals and an RX balun matching network for receiving signals.

8. The multifunctional gate control real-time control system based on RF encryption multi-frequency processing circuit according to claim 1 is characterized in that: The communication device with RF transceiver function includes a remote controller.

9. The multifunctional gate control real-time control system based on RF encryption multi-frequency processing circuit according to claim 1 is characterized in that: The power supply circuit includes a mains power supply circuit, a DC-to-DC circuit for seamless switching between mains power and power storage, a storage battery charging management circuit and a storage battery supply circuit; the mains power supply circuit is connected to the AC mains, the storage battery charging management circuit and the DC-to-DC circuit for seamless switching between mains power and power storage, converts the AC mains power into a first direct current and provides it to the storage battery charging management circuit and the DC-to-DC circuit for seamless switching between mains power and power storage; the storage battery charging management circuit is connected to the storage battery supply circuit to charge the storage battery in the storage battery supply circuit; the storage battery supply circuit is connected to the mains power and the DC-to-DC circuit for seamless switching between storage power to provide a second direct current.

10. The multifunctional gate control real-time control system based on RF encryption multi-frequency processing circuit according to claim 9, characterized in that: The DC-DC conversion circuit for seamless switching between mains power and power storage includes two diodes, the anodes of the two diodes being connected to the output end of the mains power supply circuit and the output end of the power storage supply circuit respectively, and the cathodes of the two diodes being connected to each other, serving as the DC input end of the DC-DC conversion circuit for seamless switching between mains power and power storage.

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