An NDB antenna tuning system with "who uses, who controls" preemptive logic

Abstract

The present invention relates to the field of radio navigation, and discloses an NDB antenna tuning system with a preemptive logic of "whoever uses it controls it", comprising a remote end, a local end, a preemptive logic control circuit, and a tuning circuit. The remote end and the local end are respectively connected to the input port of the preemptive logic control circuit through different interfaces, the display synchronization output interface of the preemptive logic control circuit is respectively connected to the interface of the display circuit of the remote end and the local end, and the tuning selection output interface is connected to the tuning circuit, so as to realize the preemptive logic control function of "whoever uses it controls it". The system realizes the convenience and controllability of the staff in debugging and maintaining the NDB antenna tuning unit, greatly improves the efficiency of collaborative work, and saves labor costs.

Description

Technical Field

[0001] The invention relates to the field of radio navigation, and in particular to an NDB antenna tuning system with "who uses who controls" preemptive logic. Background Art

[0002] Non-Directional Beacon (NDB) is a medium- and long-wave radio navigation device that cooperates with the airborne automatic direction finder (ADF) to provide azimuth navigation information for aircraft. NDB non-directional beacons are installed at military airports, civil airports, general aviation airports, etc. for navigation and homing of fixed-wing and rotary-wing aircraft. Due to the early origin of NDB equipment technology, the level of informatization of the equipment is low. The NDB antenna adjustment unit is installed near the antenna, and is far away from the NDB transmitter, monitor and other components (NDB host). The data such as the working status and parameters of the antenna adjustment unit cannot be sent to the NDB monitor, making debugging and maintenance inconvenient.

[0003] At airports that use NDB as a navigation and homing device, during the debugging and daily maintenance of the NDB equipment, each device requires at least two staff members to work together on the antenna adjustment unit and the NDB host, resulting in a large workload, low efficiency and high labor costs. Summary of the invention

[0004] The technical problem to be solved by the present invention is: to provide an NDB antenna tuning system with a "who uses who controls" preemptive logic, to solve the problem of coordinated work of NDB antenna tuning unit debugging and maintenance equipment by on-site staff at the remote and local ends, which can meet the debugging and maintenance work of equipment at the local end as well as the remote end. Through the "who uses who controls" preemptive logic control circuit, a working mode with equal priority at the local and remote ends is realized, and the "who uses who controls" preemptive logic control function is realized by one-key switching.

[0005] Technical Solution

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] An NDB antenna tuning system with a "who uses it controls it" preemptive logic includes a remote end, a local end, a preemptive logic control circuit, and a tuning circuit. The remote end output port can be connected to the remote output interface of the preemptive logic control circuit via Ethernet, CAN bus, RS485, etc., the local end output port is directly connected to the local input port of the preemptive logic control circuit, the preemptive logic control circuit tuning selection output port is connected to the tuning circuit input port, the preemptive logic control circuit remote display output port can be connected to the remote end input port via Ethernet, CAN bus, RS485, etc., and the preemptive logic control circuit local display output port is connected to the local end input port.

[0008] In the NDB antenna tuning system with the preemptive logic of "whoever uses it controls it" described in the present invention, the remote and local ends both include a display circuit, an authority acquisition circuit, and a tuning control circuit; the preemptive logic control circuit includes a control authority logic circuit, a tuning authority logic circuit, and a tuning selection circuit; the tuning circuit includes a servo detection circuit, a fixed adjustable inductor, a rotating adjustable inductor, and a fixed capacitor.

[0009] In the NDB antenna tuning system with "who uses, who controls" preemptive logic described in the present invention, the remote end display circuit is implemented by an LCD display screen and an LED indicator light, and the local end display circuit is implemented by an LED indicator light and an electric meter;

[0010] The authority acquisition circuit, both the remote end and the local end, includes a control authority acquisition circuit and a tuning authority acquisition circuit. The control authority is acquired by one-click via a control authority button, and the tuning authority is acquired by one-click via a tuning authority button.

[0011] The tuning control circuit includes an automatic control circuit and a manual control circuit at both the remote end and the local end. The automatic control circuit automatically controls the tuning circuit through a coupling circuit, and the manual control circuit controls the tuning circuit by manually increasing or decreasing the inductance through keystrokes.

[0012] In the NDB antenna tuning system with the "who uses who controls" preemptive logic described in the present invention, the control authority logic circuit includes a remote authority double-pole double-throw relay RL1, a local authority double-pole double-throw relay RL2, a control drive circuit, and a display synchronization circuit. The coil of RL1 is connected to the remote control authority acquisition circuit, the coil of RL2 is connected to the local control authority acquisition circuit, the normally closed port of RL1 is connected to the normally open port of RL2, the normally open port of RL1 is connected to the normally closed port of RL2, and the two common ports of RL1 and RL2 are respectively connected to the control drive circuit and the display synchronization circuit;

[0013] The tuning authority logic circuit includes a remote authority double-pole double-throw relay RL3, a local authority double-pole double-throw relay RL4, and a tuning drive circuit. A normally closed port of RL3 is connected to a normally open port of RL4, another normally closed port of RL3 is connected to another normally closed port of RL4, a normally open port of RL3 is connected to a normally closed port of RL4, another normally open port of RL3 is connected to another normally open port of RL4, a common end of RL3 is connected to an automatic control circuit of a remote and local tuning control circuit, another common end of RL3 is connected to a manual control circuit of a remote and local tuning control circuit, two common ends of RL4 are connected to the tuning drive circuit, a coil of RL3 is connected to a tuning authority acquisition circuit at the remote end, and a coil of RL4 is connected to a tuning authority acquisition circuit at the local end.

[0014] The tuning selection circuit includes two tuning selection double-pole double-throw relays RL5 and RL6, one normally closed port of RL5 is connected to the remote-end automatic control circuit, the other normally closed port of RL5 is connected to the remote-end manual control circuit, one normally closed port of RL6 is connected to the local-end automatic control circuit, the other normally closed port of RL6 is connected to the local-end manual control circuit, and two common ends of RL5 are connected to the 1st and 2nd pins of the tuning selection port of the tuning circuit; one normally open port of RL5 is connected to the local-end automatic control circuit, the other normally open port of RL5 is connected to the local-end manual control circuit, one normally open port of RL6 is connected to the local-end automatic control circuit, the other normally open port of RL6 is connected to the local-end manual control circuit, the two common ends of RL5 are connected to the 1st and 2nd pins of the tuning selection port of the tuning circuit, and the two common ends of RL6 are connected to the 3rd and 4th pins of the tuning selection port of the tuning circuit.

[0015] In the NDB antenna tuning system with the preemptive logic of "whoever uses it controls it" described in the present invention, the servo detection circuit includes a servo motor drive circuit and an antenna current detection circuit; the fixed adjustable inductor is composed of 6 sections of 220uH air-core inductors and 1 section of 700uH air-core inductor; the rotating adjustable inductor is composed of a bidirectional rotating motor and an adjustable inductor varying from 22uH to 233uH; the fixed capacitor is composed of a 1000pF porcelain disc capacitor.

[0016] Technical Effects

[0017] The local and remote monitoring circuits involved in the present invention enable staff to obtain monitoring authority of the NDB antenna adjustment unit through one-key switching. When the staff needs to debug and maintain the NDB antenna adjustment unit at the local end, they can obtain control authority by switching buttons with one key, including remote / local control authority and manual / automatic tuning authority. Similarly, when the staff needs to debug and maintain the NDB antenna adjustment unit at the remote end, they can also obtain control authority by switching buttons with one key, thereby realizing the preemptive control logic of "whoever uses it controls it". BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] Figure 1 The system workflow diagram of the present invention is as follows

[0020] Figure 2 This is a system connection diagram for implementing the "who uses, who controls" preemptive logic described in the present invention.

[0021] Figure 3 The schematic diagram of the control authority logic circuit of the present invention is shown in FIG.

[0022] Figure 4 The figure is a circuit schematic diagram of the tuning authority logic circuit described in the present invention.

[0023] Figure 5 The circuit schematic diagram of the tuning selection circuit described in the present invention. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] In an embodiment of the NDB antenna tuning system with a "who uses who controls" preemptive logic of the present invention, the working process of the NDB antenna tuning system with a "who uses who controls" preemptive logic is as follows: Figure 1As shown. The NDB antenna tuning system with "whoever uses it controls it" preemptive logic includes a remote end, a local end, a preemptive logic control circuit, and a tuning circuit. The remote end and the local end are respectively connected to the input port of the preemptive logic control circuit through different interfaces, the display synchronization output interface of the preemptive logic control circuit is respectively connected to the interface of the display circuit of the remote end and the local end, and the tuning selection output interface is connected to the tuning circuit, so as to realize the preemptive logic control function of "whoever uses it controls it".

[0026] Figure 2 This is a system connection diagram for implementing the “who uses, who controls” preemptive logic in this embodiment.

[0027] In this embodiment, when the tuning system is powered on, the system works in the remote automatic tuning working mode by default, and the staff can obtain local control authority by switching the local authority switch with one key at the local end; after obtaining local authority, the staff can obtain automatic tuning authority or manual tuning authority by switching the local tuning authority switch with one key at the local end; after obtaining local automatic tuning authority, the system works in the local automatic tuning mode, and the fixed adjustable inductor, the rotating adjustable inductor, and the fixed capacitor are automatically controlled to work together through the local automatic control circuit, the tuning drive circuit, and the servo detection circuit to automatically increase or decrease the inductance to achieve the tuning of the system; after obtaining local manual tuning authority, the system works in the local manual tuning mode, and the fixed adjustable inductor, the rotating adjustable inductor, and the fixed capacitor are automatically controlled to work together through the local manual control circuit, the tuning drive circuit, and the servo detection circuit to manually increase or decrease the inductance to achieve the tuning of the system; the staff can debug and maintain the NDB antenna tuner at the local end;

[0028] The same staff obtains the remote control tuning authority at the remote end to debug and maintain the NDB antenna tuner remotely. The workflow is the same as that at the local end. The local display circuit is realized through LED indicators and electric meters, and the authority acquisition circuit and tuning control circuit functions are realized through installation. The remote display circuit is realized through LCD display and LED indicators, and the authority acquisition circuit and tuning control circuit functions are realized through display touch function or buttons.

[0029] Figure 3 : is a circuit schematic diagram of the control authority logic circuit in this embodiment, Figure 3The coil control power supply of RL1 is generated by the remote control authority acquisition circuit, and the coil control power supply of RL2 is generated by the local control authority acquisition circuit. The normally closed ports 7 and 2 of RL1 are connected to the normally open ports 5 and 4 of RL2, and the normally open ports 5 and 4 of RL1 are connected to the normally open ports 7 and 2 of RL2. The common port 6 of RL1 and RL2 is respectively connected to the 12V power supply terminal of the control drive circuit and one end of the gate current limiting resistor R33 of Q7, and the common port 3 of RL1 and RL2 is connected to one end of the gate 1 current limiting resistor R34 of Q8 of the display synchronization circuit and GND; the coil power supply RemS_Relay_12V of RL1 is generated by the remote control authority acquisition circuit, and the coil power supply LocS_Relay_12V of RL2 is generated by the local control authority acquisition circuit. LocCNT_Relay_12V is Figure 5 The RL5 and RL6 coils in the tuning selection circuit provide control power, LED2 and LED1 indicate the remote end and the local end respectively, and the indication status is collected by the ARM chip and synchronized to the display circuits of the remote end and the local end respectively.

[0030] Figure 4 : is a circuit schematic diagram of the tuning authority logic circuit in this embodiment, Figure 4 In the figure, the normally closed ports 7, 2 of RL3 are connected to the normally open ports 5 and normally closed port 2 of RL4, the normally open ports 5, 4 of RL3 are connected to the normally closed port 7 and normally open port 5 of RL4, the common port 3 of RL3 is connected to the automatic control circuit of the remote and local tuning control circuits, the common terminal 6 of RL3 is connected to the manual control circuit of the remote and local tuning control circuits, the two common terminals 6, 3 of RL4 are connected to the power supply 12V and GND of the tuning drive circuit, the coil power supply RemT_Relay_12V of RL3 is generated by the tuning authority acquisition circuit at the remote end, and the coil LocT_Relay_12V of RL4 is generated by the tuning authority acquisition circuit at the local end.

[0031] Figure 5 : is a circuit schematic diagram of the tuning selection circuit in this embodiment, Figure 5 In the embodiment, the normally closed ports 2 and 7 of RL5 are connected to the remote end automatic control circuit and the manual control circuit, and the normally closed ports 2 and 7 of RL6 are connected to the remote end automatic control circuit and the manual control circuit; the normally open ports 4 and 5 of RL5 are connected to the local end automatic control circuit and the manual control circuit, and the normally open ports 4 and 5 of RL6 are connected to the remote end automatic control circuit and the manual control circuit, the two common terminals 3 and 6 of RL5 are connected to the 1st and 2nd pins of the tuning selection port of the tuning circuit, and the two common terminals 6 and 3 of RL6 are connected to the 3rd and 4th pins of the tuning selection port of the tuning circuit.

[0032] The ARM chip detects the level of the common terminal 6 of RL2 in the control drive circuit to determine whether the control authority comes from the remote end or the local end. It detects the conduction status of LED2 and LED1 and synchronizes the display information to the remote end and the local end through the display synchronization circuit. It detects the level of the common terminals 3 and 6 of RL3 in the tuning control circuit to determine whether it is automatic control or manual control. Through the coordinated processing of the ARM chip, the system's "whoever uses it controls it" preemptive logic control function is realized.

[0033] To sum up, the NDB antenna tuning system with the preemptive logic of "who uses it controls it" provided by the present invention can enable the staff to obtain control authority of equal priority at the local and remote ends according to the preemptive logic of "who uses it controls it", which greatly facilitates the staff to maintain and debug the operability of the equipment, improves work collaboration efficiency, and saves labor costs.

Claims

1. An NDB antenna tuning system with "who uses, who controls" preemptive logic, characterized in that: It comprises a remote end, a local end, a preemptive logic control circuit, and a tuning circuit. The remote end output port is connected to the remote output interface of the preemptive logic control circuit through Ethernet, CAN bus, and RS485. The local end output port is directly connected to the local input port of the preemptive logic control circuit. The tuning selection output port of the preemptive logic control circuit is connected to the tuning circuit input port. The remote display output port of the preemptive logic control circuit is connected to the remote end input port through Ethernet, CAN bus, and RS485. The local display output port of the preemptive logic control circuit is connected to the local end input port. Both the remote and local ends comprise a display circuit, an authority acquisition circuit, and a tuning control circuit. The preemptive logic control circuit comprises a control authority logic circuit, a tuning authority logic circuit, and a tuning selection circuit. The tuning circuit comprises a servo detection circuit, a fixed adjustable inductor, a rotating adjustable inductor, and a fixed capacitor. The control authority logic circuit comprises a remote authority double-pole double-throw relay RL1, a local authority double-pole double-throw relay RL2, a control drive circuit, and a display synchronization circuit. The coil of RL1 is connected to the remote end. The control authority acquisition circuit is connected, the coil of RL2 is connected to the local control authority acquisition circuit, the normally closed port of RL1 is connected to the normally open port of RL2, the normally open port of RL1 is connected to the normally closed port of RL2, and the two common ports of RL1 and RL2 are respectively connected to the control drive circuit and the display synchronization circuit; the tuning authority logic circuit includes a remote authority double-pole double-throw relay RL3, a local authority double-pole double-throw relay RL4, and a tuning drive circuit, a normally closed port of RL3 is connected to a normally open port of RL4, and the other normally closed port of RL3 is connected to R Another normally closed port of L4 is connected, a normally open port of RL3 is connected to a normally closed port of RL4, another normally open port of RL3 is connected to another normally open port of RL4, a common end of RL3 is connected to the automatic control circuit of the remote and local tuning control circuits, another common end of RL3 is connected to the manual control circuit of the remote and local tuning control circuits, two common ends of RL4 are connected to the tuning drive circuit, the coil of RL3 is connected to the tuning authority acquisition circuit of the remote end, and the coil of RL4 is connected to the tuning authority acquisition circuit of the local end.

2. The NDB antenna tuning system with "who uses, who controls" preemptive logic according to claim 1, characterized in that: The remote-end display circuit is implemented through an LCD display screen and an LED indicator light, and the local-end display circuit is implemented through an LED indicator light and an electric meter; the authority acquisition circuit, both the remote and local ends include a control authority acquisition circuit and a tuning authority acquisition circuit, the control authority is acquired with one click through a control authority button, and the tuning authority is acquired with one click through a tuning authority button.

3. The NDB antenna tuning system with "who uses, who controls" preemptive logic according to claim 2, characterized in that: The tuning control circuit includes an automatic control circuit and a manual control circuit at both the remote end and the local end. The automatic control circuit automatically controls the tuning circuit through a coupling circuit, and the manual control circuit controls the tuning circuit by manually increasing or decreasing the inductance through keystrokes.

4. The NDB antenna tuning system with "who uses, who controls" preemptive logic according to claim 3, characterized in that: The tuning selection circuit includes two tuning selection double-pole double-throw relays RL5 and RL6, one normally closed port of RL5 is connected to the remote-end automatic control circuit, the other normally closed port of RL5 is connected to the remote-end manual control circuit, one normally closed port of RL6 is connected to the remote-end automatic control circuit, the other normally closed port of RL6 is connected to the remote-end manual control circuit, one normally open port of RL5 is connected to the local-end automatic control circuit, the other normally open port of RL5 is connected to the local-end manual control circuit, one normally open port of RL6 is connected to the local-end automatic control circuit, the other normally open port of RL6 is connected to the local-end manual control circuit, two common ends of RL5 are connected to the 1st and 2nd pins of the tuning selection port of the tuning circuit, and two common ends of RL6 are connected to the 3rd and 4th pins of the tuning selection port of the tuning circuit.

5. The NDB antenna tuning system with "who uses, who controls" preemptive logic according to claim 4, characterized in that: The servo detection circuit includes a servo motor drive circuit and an antenna current detection circuit; the fixed adjustable inductor consists of 6 sections of 220uH air-core inductors and 1 section of 700uH air-core inductors; the rotating adjustable inductor consists of a bidirectional rotating motor and an adjustable inductor varying from 22uH to 233uH; the fixed capacitor consists of a 1000pF ceramic disc capacitor.

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