Beidou beacon system for airborne platform

Abstract

The utility model discloses a Beidou beacon machine system for an airborne platform, which belongs to the technical field of communication, comprises a beacon machine, a host and a Beidou terminal, and solves the technical problems of emergency positioning switching circuit design and beacon emission power supply circuit design of the Beidou beacon machine system. According to the utility model, the host system can be switched into battery power supply in a non-emergency state, energy consumption is reduced, and the service life of equipment is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to communication technical field especially relates to a beidou beacon machine system for airborne platform. BACKGROUND

[0002] The "beidou beacon machine" is the basic equipment of the airborne platform system construction, and is a new quality growth point of improving the advantages of the airborne platform. With the upgrading of the airborne platform and the continuous expansion of the mission, especially under the new situation, the establishment of the beidou satellite navigation system will be an important driving force for the beacon machine reform, giving birth to new application methods and changing the future market. It has become an urgent task to grasp the development trend of the beacon form, adapt to the future market demand, and accelerate the construction of the "beidou beacon machine" product.

[0003] With the strengthening of global trade, various airborne platforms have served the world, resulting in higher requirements for the short message receiving and transmitting capability of the beidou beacon machine. Ensuring that the beidou beacon machine can serve the world is a key problem that needs to be solved, and a new generation of beidou beacon machine system for airborne platform is urgently needed. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a beidou beacon machine system for airborne platform, solving the technical problems of emergency positioning switching circuit design and beacon transmitting power supply circuit design of the beidou beacon machine system.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical utility model:

[0006] A beidou beacon machine system for airborne platform, comprising a beacon machine, a host computer and a beidou terminal, the beacon machine and the beidou terminal respectively communicate with the host computer through two 422 buses;

[0007] The beacon machine comprises a radio frequency transmitting module, a beacon antenna, a lithium battery pack, a beacon machine power supply circuit and a beacon machine control unit, the beacon machine control unit comprises a main controller U20, and a radio frequency 8V power supply enabling circuit, a radio frequency 7V power supply enabling circuit, a beacon machine communication unit, a beacon machine temperature sensor, a beacon machine power supply sampling circuit, a beacon machine acceleration sensor, an input isolation circuit, an output isolation circuit, a battery switch circuit, an SD card slot and a TF slot which are electrically connected with the main controller U20 respectively;

[0008] The input end of the beacon machine power supply circuit is connected with an external 24V power supply and the lithium battery pack respectively, and the output end supplies power for the beacon machine control unit and the radio frequency transmitting module, and the radio frequency transmitting module is connected with the beacon antenna;

[0009] The output end of the beacon machine power supply circuit also outputs a YOUT backup power supply;

[0010] The beacon machine power supply sampling circuit is used for collecting the voltage generated by the beacon machine power supply circuit;

[0011] The host computer includes a host computer power supply circuit and a host computer control unit, and the host computer control unit includes a host computer controller U2, a host computer communication unit, a host computer temperature sensor, a host computer acceleration sensor and a host computer power supply sampling circuit which are electrically connected with the host computer controller U2 respectively;

[0012] The input end of the host computer power supply circuit is connected with an external 24V power supply and a YOUT backup power supply respectively, and the output end is used for supplying power to the host computer control unit;

[0013] The host computer communication unit includes three communication modules which are electrically connected with and communicate with an external To integrated display device, a beacon machine communication unit and a Beidou terminal respectively;

[0014] The host computer power supply sampling circuit is used for collecting the voltage generated by the host computer power supply circuit.

[0015] Preferably, the beacon machine power supply circuit includes a first power supply interface, a first TVS module, a first DC power supply module, a voltage stabilizing module, a 3.3V voltage stabilizing module, an 8V voltage stabilizing module, a 7V voltage stabilizing module, a -5V voltage stabilizing module, a battery interface, a second TVS module, a battery management module and an emergency power supply circuit;

[0016] The first power supply interface is used for connecting an external 24V power supply, the first power supply interface is connected with the first TVS module, and the first TVS module outputs a 24V0 power supply;

[0017] The first DC power supply module, the 8V voltage stabilizing module, the 7V voltage stabilizing module and the -5V voltage stabilizing module are connected with the 24V0 power supply, and the first DC power supply module, the 8V voltage stabilizing module, the 7V voltage stabilizing module and the -5V voltage stabilizing module output a 5V0 power supply, an 8V0 power supply, a 7V0 power supply and an RF-5V0 power supply respectively;

[0018] The voltage stabilizing module and the 3.3V voltage stabilizing module are connected with the 5V0 power supply, and the voltage stabilizing module and the 3.3V voltage stabilizing module output a 3V3 power supply and an RF3V3 power supply respectively;

[0019] The enable end of the 3.3V voltage stabilizing module is connected with an IO port of the host computer controller U2;

[0020] The battery interface is used for connecting a lithium battery pack, the battery interface is connected with the second TVS module, and the second TVS module outputs a BAT power supply;

[0021] The battery management module is connected with the BAT power supply and outputs a BAT3V3 power supply and a 12V0 power supply respectively;

[0022] The input end of the emergency power supply circuit is connected with a 3V3 power supply, an RF-5V0 power supply and an RF3V3 power supply, and the corresponding output is a 3.3VTTL power supply, a -5V power supply and a +3.3V power supply, which provide working voltages for the radio frequency transmitting module.

[0023] Preferably, the input end of the radio frequency 8V power supply circuit is connected with an 8V0 power supply, and the output end outputs an RF8V0 power supply, and the enable end is connected with an IO port of the main controller U20;

[0024] The input end of the radio frequency 7V power supply circuit is connected with a 7V0 power supply, and the output end outputs an RF7V0 power supply, and the enable end is connected with an IO port of the main controller U7;

[0025] The input end of the emergency power supply circuit is also connected with an RF8V0 power supply and an RF7V0 power supply, and the output end also outputs a +8V power supply and a +7V power supply, which are used to provide working voltages for the radio frequency transmitting module;

[0026] The beacon machine communication unit includes a beacon machine 422 unit and a first external communication interface, the beacon machine 422 unit communicates with a serial port USART1 of the main controller U20 through a serial port bus, the beacon machine 422 unit is connected with the first external communication interface, and the first external communication interface communicates with a communication module of the host communication unit; the beacon machine 422 unit is powered by a 3V3 power supply;

[0027] The beacon machine 422 unit is composed of a 422 module U18 and a peripheral circuit thereof, and the 422 module U18 is of a MAX3490 type;

[0028] The first external communication interface is an interface JP17, the 2nd pin, the 3rd pin, the 4th pin and the 5th pin of the interface JP17 are connected with the output end of the beacon machine 422 unit, and the 2nd pin and the 3rd pin of the 422 module U18 are respectively connected with a serial port USART1 of the main controller U20 through a resistor R120 and a resistor R123;

[0029] The beacon machine temperature sensor and the beacon machine acceleration sensor are respectively connected with the main controller U20 through an I2C interface and an SPI interface, and both the beacon machine temperature sensor and the beacon machine acceleration sensor are powered by a 3V3 power supply;

[0030] The beacon machine temperature sensor is composed of a sensor U21 and a peripheral circuit thereof, and the sensor U21 is of an LM75A type;

[0031] The beacon machine acceleration sensor is composed of a sensor U22 and a peripheral circuit thereof, and the sensor U22 is of an LSM6DSV16X type;

[0032] The beacon machine power supply sampling circuit is used for collecting voltage values of 8V0 power supply, 7V0 power supply, BAT power supply, 24V0 power supply, 12V0 power supply and 3V3 power supply respectively, and is connected with 6 AD interfaces of the main controller U20 respectively;

[0033] The input end of the input isolation circuit is connected with an external emergency switch, and the output end is connected with an IO port of the main controller U20;

[0034] The input end of the output isolation circuit is connected with an IO port of the main controller U20, and the output end is connected with and drives an external LED lamp;

[0035] The input end of the battery switch circuit is connected with 12VO power supply and BAT3V3 power supply, the output end outputs YOUT backup power supply, and the enable end is connected with an IO port of the main controller U20; the voltage value of the YOUT backup power supply is 24V;

[0036] The SD slot and the TF slot are connected with the main controller U20 through the same group of SPI buses, and are powered by 3V3 power supply.

[0037] Preferably, the first TVS module is a TVS protection circuit composed of a TVS tube DR14 and a P-channel field effect transistor Q2;

[0038] The first DC power supply module is a 24V-5V voltage stabilizing circuit composed of a DC-DC module U5 and its peripheral circuit, and the model of the DC-DC module U5 is SY8113C1ADC;

[0039] The voltage stabilizing module is a voltage stabilizing circuit composed of a voltage stabilizer U9 and its peripheral circuit, and the model of the voltage stabilizer U9 is LT1963AEST-3.3;

[0040] The 3.3V voltage stabilizing module is a voltage stabilizing circuit composed of a voltage stabilizing module U23 and its peripheral circuit,

[0041] The model of the voltage stabilizing module U23 is LT1963AEST-3.3;

[0042] The 8V voltage stabilizing module is a 24V-to-8V DC-DC voltage stabilizing circuit composed of a voltage stabilizing module U17 and its peripheral circuit, and the model of the voltage stabilizing module U17 is SY8113C1ADC;

[0043] The 7V voltage stabilizing module is a 24V-to-7V DC-DC voltage stabilizing circuit composed of a voltage stabilizing module U19 and its peripheral circuit, and the model of the voltage stabilizing module U19 is SY8113C1ADC;

[0044] The -5V voltage stabilizing module is a 24V-to-5V DC-DC voltage stabilizing circuit composed of a voltage stabilizing module U24 and its peripheral circuit, and the model of the voltage stabilizing module U24 is SY8113C1ADC;

[0045] The battery interface is interface J14, and the second TVS module is a TVS protection circuit composed of a TVS tube DR27 and a P-channel field effect transistor Q3.

[0046] The battery management module is composed of a battery management chip U8 and its peripheral circuit, and the model of the battery management module is LTC4006.

[0047] The emergency power supply circuit includes interface JP22, capacitors C127, C128, C129, C130, C131, C132, C133, C134, magnetic beads L51, L52, L53, L54 and L55.

[0048] One end of the magnetic bead L51 is connected to the RF8V0 power supply, and the other end is connected to the 6-pin of the interface JP22, and the capacitors C127 and C134 are filter capacitors for both ends of the magnetic bead L51.

[0049] One end of the magnetic bead L52 is connected to the RF-5V0 power supply, and the other end is connected to the 6-pin of the interface JP5, and the capacitors C128 and C133 are filter capacitors for both ends of the magnetic bead L52.

[0050] One end of the magnetic bead L53 is connected to the 3V3TTL power supply, and the other end is connected to the 4-pin of the interface JP22; the 3V3TTL power supply is obtained through the 3V3 power supply.

[0051] One end of the magnetic bead L54 is connected to the RF3V3 power supply, and the other end is connected to the 3-pin of the interface JP22, and the capacitors C129 and C132 are filter capacitors for both ends of the magnetic bead L54.

[0052] One end of the magnetic bead L55 is connected to the RF7V0 power supply, and the other end is connected to the 2-pin of the interface JP22, and the capacitors C130 and C131 are filter capacitors for both ends of the magnetic bead L55.

[0053] The 1-pin of the interface JP22 is connected to the ground wire, the 2-pin outputs the +7V power supply, the 3-pin outputs the +3.3V power supply, the 4-pin outputs the 3.3VTTL power supply, the 5-pin outputs the -5V power supply, and the 6-pin outputs the +8V power supply.

[0054] The model of the main controller U20 is an STM32F103RBT6 single-chip microcomputer.

[0055] Preferably, the battery switch circuit comprises diode D13, resistor R91, resistor R83, resistor R88, resistor R84, capacitor C74, field effect transistor Q4, resistor R89, optocoupler U14, diode D14, resistor R87, resistor R92, triode Q5, resistor R85, diode D11, resistor R90, capacitor C75 and resistor R93;

[0056] The negative electrode of diode D13 is connected to an external emergency signal, the positive electrode of diode D13 is connected to the S electrode of field effect transistor Q4 through resistor R83, connected to the 1 pin of optocoupler U14 through resistor R88, and connected to the ground wire through resistor R91, the 2 pin of optocoupler U14 is connected to the negative electrode of diode D14, the positive electrode of diode D14 is connected to the ground wire, the 4 pin of optocoupler U14 is connected to BAT3V3 power supply through resistor R89, the 3 pin is connected to the ground wire, and the 4 pin of optocoupler U14 is also connected to the base electrode of triode Q5 through resistor R92, the base electrode of triode Q5 is connected to an IO port of main controller U20 through resistor R93, and the connection network number is BAT_EN, the collector electrode of triode Q5 is connected to the G electrode of field effect transistor Q4 through resistor R87, and the emitter electrode is connected to the ground wire, resistor R90 and capacitor C75 are connected in parallel between the base electrode and the emitter electrode of triode Q5;

[0057] The S electrode of field effect transistor Q4 is connected to 12V0 power supply, and the D electrode is connected to the positive electrode of diode D11, and the negative electrode of diode D11 outputs YOUT standby power supply;

[0058] Resistor R84 and capacitor C74 are connected in parallel between the S electrode and the G electrode of field effect transistor Q4, and the positive electrode of diode D11 is connected to the emitter electrode of triode Q5 through resistor R85;

[0059] The beacon machine power supply sampling circuit is a resistor type voltage sampling circuit;

[0060] The input isolation circuit and the output isolation circuit are both switching quantity optocoupler isolation circuits.

[0061] Preferably, the host power supply circuit comprises a second power supply interface, an emergency power supply interface, a second TVS module and a second DC power supply module, the second power supply interface is interface JP1, the 3 pin of interface JP1 is connected to an external 24V power supply, the 2 pin is connected to the ground wire, and the 1 pin of interface JP1 is also connected to an external starting switch;

[0062] The emergency power supply interface is interface JP9, the 1 pin of interface JP9 is connected to YOUT standby power supply, and the 2 pin is connected to the ground wire;

[0063] The second TVS module is a TVS protection circuit composed of TVS tube DR1 and P-channel field effect transistor IC1;

[0064] The second DC power module is a 24V-3.3V voltage stabilizing circuit composed of a DC-DC module IC1 and its peripheral circuit, and the DC-DC module IC1 outputs a Z3V3 power supply, and the model of the DC-DC module IC1 is SY8113C1ADC.

[0065] Preferably, the host communication unit comprises a communication module A, a communication module B and a communication module C, the communication module A comprises an external communication interface A and a host 422 unit A, the external communication interface A is an interface JP11;

[0066] The host 422 unit A is composed of a 422 module U1 and its peripheral circuit, and the 4th pin, the 5th pin, the 6th pin and the 7th pin of the interface JP11 are connected with the output end of the host 422 unit A; the host 422 unit A is responsible for communication with an external integrated display device;

[0067] The host 422 unit B is composed of a 422 module U3 and its peripheral circuit, and the 1st pin, the 2nd pin, the 3rd pin and the 4th pin of the interface JP12 are connected with the output end of the host 422 unit B; the host 422 unit B is responsible for communication with a Beidou terminal;

[0068] The host 422 unit C is composed of a 422 module U6 and its peripheral circuit, and the 1st pin, the 2nd pin, the 3rd pin and the 4th pin of the interface JP7 are connected with the output end of the host 422 unit C; the interface JP7 is connected with an interface JP17, the host 422 unit C is responsible for communication with a beacon machine 422 unit; the 7th pin of the interface JP7 is also connected with an external LED lamp, and the 6th pin is also connected with an external emergency switch;

[0069] The host temperature sensor is composed of a sensor U10 and its peripheral circuit, and the model of the sensor U10 is LM75A;

[0070] The host acceleration sensor is composed of a sensor U11 and its peripheral circuit, and the model of the sensor U11 is LSM6DSV16X;

[0071] The main controller U2, the host communication unit, the host temperature sensor and the host acceleration sensor are all powered by the Z3V3 power supply;

[0072] The host power supply sampling circuit is responsible for collecting the voltage of the 3rd pin of the interface JP1 and the voltage of the Z3V3 power supply; and the host power supply sampling circuit is a resistance type voltage collection circuit.

[0073] The Beidou beacon machine system for the airborne platform provided by the utility model solves the technical problems of the emergency positioning switching circuit design and the beacon transmission power supply circuit design of the Beidou beacon machine system; the host system can be switched to battery power supply in a non-emergency state, thereby reducing energy consumption and prolonging the service life of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0074] Figure 1 is a general schematic block diagram of the present application;

[0075] Figure 2 is a schematic block diagram of the beacon machine power supply circuit of the present application;

[0076] Figure 3 is a schematic block diagram of the beacon machine control unit of the present application;

[0077] Figure 4 is a schematic block diagram of the host machine power supply circuit and host machine control unit of the present application;

[0078] Figure 5 is a circuit diagram of the host machine power supply circuit and host machine power supply sampling circuit of the present application;

[0079] Figure 6 is a circuit diagram of the communication module A, communication module B and communication module C of the present application;

[0080] Figure 7 is a circuit diagram of the host controller U2, host machine temperature sensor and host machine acceleration sensor of the present application;

[0081] Figure 8 is a circuit diagram of the beacon machine power supply sampling circuit, first power supply interface, first TVS module, first DC power supply module, voltage stabilizing module, battery interface, second TVS module and battery management module of the present application;

[0082] Figure 9 is a circuit diagram of the host controller U20 of the present application;

[0083] Figure 10 is a circuit diagram of the beacon machine temperature sensor, beacon machine acceleration sensor, input isolation circuit, output isolation circuit, battery switch circuit, radio frequency 8V power supply enabling circuit, radio frequency 7V power supply enabling circuit, SD card slot and TF slot of the present application;

[0084] Figure 11 is a circuit diagram of the 3.3V voltage stabilizing module, 8V voltage stabilizing module, 7V voltage stabilizing module, -5V voltage stabilizing module, emergency power supply circuit and beacon machine communication unit of the present application. DETAILED DESCRIPTION

[0085] A Beidou beacon machine system for an airborne platform shown in FIG. 1 includes a beacon machine, a host machine and a Beidou terminal, the beacon machine and the Beidou terminal respectively communicate with the host machine through two 422 buses; Figures 1-11

[0086] The model of the Beidou terminal is UBlox M10.

[0087] ​The beacon machine comprises a radio frequency transmitting module, a beacon antenna, a lithium battery pack, a beacon machine power supply circuit and a beacon machine control unit, the beacon machine control unit comprises a main controller U20, and the radio frequency 8V power supply enabling circuit, the radio frequency 7V power supply enabling circuit, the beacon machine communication unit, the beacon machine temperature sensor, the beacon machine power supply sampling circuit, the beacon machine acceleration sensor, the input isolation circuit, the output isolation circuit, the battery switch circuit, the SD card slot and the TF slot are electrically connected with the main controller U20 respectively;

[0088] The radio frequency transmitting module is of TI CC1120 type.

[0089] In the embodiment, the SD card slot is composed of a card slot U16, a resistor R97, a resistor R96 and a capacitor C76, and is powered by a 3V3 power supply; the TF slot is composed of a card slot TF1, resistors R104 to R107, a capacitor C78 and TVS tubes DE7 to DE710, and is powered by a 3V3 power supply;

[0090] The card slot U16 and the card slot TF1 share one SPI interface and both communicate with the main controller U20; in application, the card slot U16 and the card slot TF1 are respectively used for inserting an SD card and a TF card; the main controller U20 automatically judges whether the current is in an emergency state by monitoring the signal of the acceleration sensor U22; in the emergency state, the main controller U20 controls the radio frequency 8V power supply enabling circuit, the -5V voltage stabilizing module and the radio frequency 7V power supply enabling circuit to act, so that the radio frequency transmitting module is powered through the emergency power supply circuit, the radio frequency transmitting module generates a 243MHz distress signal and transmits the signal to the outside through the beacon antenna, and meanwhile, the main controller U20 records the data of the acceleration sensor U22 read to the TF card or the SD card.

[0091] The input end of the beacon machine power supply circuit is connected with an external 24V power supply and the lithium battery pack, and the output end is used for supplying power to the beacon machine control unit and the radio frequency transmitting module; the radio frequency transmitting module is connected with the beacon antenna;

[0092] The output end of the beacon machine power supply circuit also outputs a YOUT backup power supply;

[0093] The beacon machine power supply sampling circuit is used for collecting the voltage generated by the beacon machine power supply circuit;

[0094] The beacon machine power supply circuit comprises a first power supply interface, a first TVS module, a first DC power supply module, a voltage stabilizing module, a 3.3V voltage stabilizing module, an 8V voltage stabilizing module, a 7V voltage stabilizing module, a -5V voltage stabilizing module, a battery interface, a second TVS module, a battery management module and an emergency power supply circuit;

[0095] The first power supply interface is used for connecting an external 24V power supply, the first power supply interface is connected with the first TVS module, and the first TVS module outputs a 24V0 power supply;

[0096] The first DC power module, the 8V voltage stabilizing module, the 7V voltage stabilizing module and the -5V voltage stabilizing module are connected with the 24V0 power supply, and the first DC power module, the 8V voltage stabilizing module, the 7V voltage stabilizing module and the -5V voltage stabilizing module output the 5V0 power supply, the 8V0 power supply, the 7V0 power supply and the RF-5V0 power supply respectively;

[0097] The voltage stabilizing module and the 3.3V voltage stabilizing module are connected with the 5V0 power supply, and the voltage stabilizing module and the 3.3V voltage stabilizing module output the 3V3 power supply and the RF3V3 power supply respectively;

[0098] The enable end of the 3.3V voltage stabilizing module is connected with an IO port of the main controller U20;

[0099] The battery interface is used for connecting a lithium battery pack, the battery interface is connected with the second TVS module, and the second TVS module outputs the BAT power supply;

[0100] The battery management module is connected with the BAT power supply and outputs the BAT3V3 power supply and the 12V0 power supply respectively;

[0101] The input end of the emergency power supply circuit is connected with the 3V3 power supply, the RF-5V0 power supply and the RF3V3 power supply, and the corresponding output is the 3.3VTTL power supply, the -5V power supply and the +3.3V power supply, and the 3.3VTTL power supply, the -5V power supply and the +3.3V power supply provide working voltages for the radio frequency transmitting module.

[0102] The input end of the radio frequency 8V power supply circuit is connected with the 8V0 power supply, the output end outputs the RF8V0 power supply, and the enable end is connected with an IO port of the main controller U20;

[0103] The input end of the radio frequency 7V power supply circuit is connected with the 7V0 power supply, the output end outputs the RF7V0 power supply, and the enable end is connected with an IO port of the main controller U7;

[0104] The input end of the emergency power supply circuit is also connected with the RF8V0 power supply and the RF7V0 power supply, and the output end also outputs the +8V power supply and the +7V power supply correspondingly, and the +8V power supply and the +7V power supply are used for providing working voltages for the radio frequency transmitting module;

[0105] The beacon machine communication unit includes a beacon machine 422 unit and a first external communication interface, the beacon machine 422 unit communicates with one serial port USART1 of the main controller U20 through a serial port bus, the beacon machine 422 unit is connected with the first external communication interface, and the first external communication interface communicates with one communication module of the host computer communication unit; the beacon machine 422 unit is powered by the 3V3 power supply;

[0106] The beacon machine 422 unit is composed of a 422 module U18 and a peripheral circuit thereof, and the 422 module U18 is of the MAX3490 type.

[0107] The first external communication interface is interface JP17, the 2nd pin, 3rd pin, 4th pin and 5th pin of interface JP17 are connected with the output end of beacon 422 unit, the 2nd pin and 3rd pin of 422 module U18 are respectively connected with one serial port USART1 of main controller U20 through resistance R120 and resistance R123 for communication;

[0108] In the embodiment, the peripheral circuit of 422 module U18 further comprises 422 bus circuit, which is composed of inductor L43, inductor L47 and TVS tube DR36 to TVS tube DR41, the 422 bus output by 422 bus circuit is connected with interface JP17, and the circuit network number is 422_RX+, 422_RX-, 422_TX- and 422_TX+.

[0109] The beacon 422 unit is mainly responsible for communicating with the host computer and interacting with the instruction or information whether to enter the emergency state.

[0110] The beacon temperature sensor and the beacon acceleration sensor are respectively connected with the main controller U20 through I2C interface and SPI interface, and the beacon temperature sensor and the beacon acceleration sensor are both powered by 3V3 power supply;

[0111] The beacon temperature sensor is composed of sensor U21 and its peripheral circuit, and the model of sensor U21 is LM75A;

[0112] The beacon acceleration sensor is composed of sensor U22 and its peripheral circuit, and the model of sensor U22 is LSM6DSV16X;

[0113] The beacon power supply sampling circuit is used for respectively collecting the voltage values of 8V0 power supply, 7V0 power supply, BAT power supply, 24V0 power supply, 12V0 power supply and 3V3 power supply, and is respectively connected with 6 AD interfaces of the main controller U20;

[0114] The input end of the input isolation circuit is connected with the external emergency switch, and the output end is connected with one IO port of the main controller U20;

[0115] In the embodiment, the input isolation circuit is a switching value signal isolation circuit composed of photo-coupler U13 and its peripheral circuit, which is used for introducing the signal of the external emergency switch into the main controller U20, so as to judge whether to enter the emergency state;

[0116] The input end of the output isolation circuit is connected with one IO port of the main controller U20, and the output end is connected with and drives one external LED lamp;

[0117] The output isolation circuit is a switch quantity driving isolation circuit composed of an optical coupler U15 and its peripheral circuit, and is used for driving an external LED lamp to indicate the working state of the beacon machine.

[0118] The input end of the battery switch circuit is connected with 12V0 power supply and BAT3V3 power supply, the output end outputs YOUT backup power supply, and the enable end is connected with an IO port of the main controller U20; the voltage value of the YOUT backup power supply is 24V.

[0119] The SD slot and the TF slot are connected with the main controller U20 through the same group of SPI buses, and are powered by 3V3 power supply.

[0120] The first TVS module is a TVS protection circuit composed of a TVS tube DR14 and a P-channel field effect transistor Q2;

[0121] The first DC power supply module is a 24V-5V voltage stabilizing circuit composed of a DC-DC module U5 and its peripheral circuit, and the model of the DC-DC module U5 is SY8113C1ADC;

[0122] The voltage stabilizing module is a voltage stabilizing circuit composed of a voltage stabilizer U9 and its peripheral circuit, and the model of the voltage stabilizer U9 is LT1963AEST-3.3;

[0123] The 3.3V voltage stabilizing module is a voltage stabilizing circuit composed of a voltage stabilizing module U23 and its peripheral circuit,

[0124] The model of the voltage stabilizing module U23 is LT1963AEST-3.3;

[0125] The enable end 5 pin of the voltage stabilizing module U23 is connected with an IO port (circuit network number Ctrl3) of the main controller U20 through a resistor R155, so that the main controller U20 controls whether the voltage stabilizing module U23 outputs 3.3V voltage (namely, RF3V3 power supply).

[0126] The 8V voltage stabilizing module is a 24V-8V DC-DC voltage stabilizing circuit composed of a voltage stabilizing module U17 and its peripheral circuit, and the model of the voltage stabilizing module U17 is SY8113C1ADC;

[0127] In the embodiment, the radio frequency 8V power supply enabling circuit is an electronic switch circuit composed of a triode Q7 and a field effect transistor Q6, and an IO port (circuit network number Ctrl1) of the main controller U20 controls whether the field effect transistor Q6 is turned on by controlling the level of the base of the triode Q7, so that the 8V0 power supply output by the 8V voltage stabilizing module is loaded to the emergency power supply circuit.

[0128] 7V stabilizing module is a 24V to 7V DC-DC stabilizing circuit composed of stabilizing module U19 and its peripheral circuit, and the model of stabilizing module U19 is SY8113C1ADC;

[0129] RF 7V power supply enabling circuit is an electronic switch circuit composed of transistor Q9 and field effect transistor Q8, and an IO port (circuit network number Ctrl2) of main controller U20 controls whether field effect transistor Q8 is turned on by controlling the level of the base of transistor Q9, so that the 7V0 power supply output by 7V stabilizing module is loaded on the emergency power supply circuit.

[0130] -5V stabilizing module is a 24V to -5V DC-DC stabilizing circuit composed of stabilizing module U24 and its peripheral circuit, and the model of stabilizing module U24 is SY8113C1ADC;

[0131] 8V stabilizing module, 7V stabilizing module and -5V stabilizing module are used to provide working voltage for the RF transmitting module.

[0132] The battery interface is interface J14, and the second TVS module is a TVS protection circuit composed of TVS tube DR27 and P-channel field effect transistor Q3;

[0133] The battery management module is composed of battery management chip U8 and its peripheral circuit, and the model of the battery management module is LTC4006;

[0134] The emergency power supply circuit includes interface JP22, capacitors C127, C128, C129, C130, C131, C132, C133, C134, magnetic beads L51, L52, L53, L54 and L55;

[0135] One end of magnetic bead L51 is connected to RF 8V0 power supply, and the other end is connected to the 6-pin of interface JP22, and capacitors C127 and C134 are filter capacitors for both ends of magnetic bead L51;

[0136] One end of magnetic bead L52 is connected to RF -5V0 power supply, and the other end is connected to the 6-pin of interface JP5, and capacitors C128 and C133 are filter capacitors for both ends of magnetic bead L52;

[0137] One end of magnetic bead L53 is connected to 3V3TTL power supply, and the other end is connected to the 4-pin of interface JP22; 3V3TTL power supply is obtained through 3V3 power supply, and in this embodiment, 3V3TTL power supply can be obtained by filtering 3V3 power supply through magnetic beads.

[0138] One end of the magnetic bead L54 is connected with the RF3V3 power supply, and the other end is connected with the 3-pin of the interface JP22, and the capacitor C129 and the capacitor C132 are filter capacitors of two ends of the magnetic bead L54 respectively;

[0139] One end of the magnetic bead L55 is connected with the RF7V0 power supply, and the other end is connected with the 2-pin of the interface JP22, and the capacitor C130 and the capacitor C131 are filter capacitors of two ends of the magnetic bead L55 respectively;

[0140] The 1-pin of the interface JP22 is connected with the ground wire, the 2-pin outputs the +7V power supply, the 3-pin outputs the +3.3V power supply, the 4-pin outputs the 3.3VTTL power supply, the 5-pin outputs the -5V power supply, and the 6-pin outputs the +8V power supply;

[0141] The role of the emergency power supply circuit is to filter through the magnetic beads, so that the RF8V0 power supply, the RF-5V0 power supply, the 3V3TTL power supply, the RF7V0 power supply and the RF3V3 power supply supply power to the outside.

[0142] The model of the main controller U20 is STM32F103RBT6 single-chip microcomputer. The model of the main controller U2 is also STM32F103RBT6 single-chip microcomputer.

[0143] The battery switch circuit comprises a diode D13, a resistor R91, a resistor R83, a resistor R88, a resistor R84, a capacitor C74, a field effect tube Q4, a resistor R89, an optical coupler U14, a diode D14, a resistor R87, a resistor R92, a triode Q5, a resistor R85, a diode D11, a resistor R90, a capacitor C75 and a resistor R93.

[0144] The negative electrode of the diode D13 is connected with an external emergency signal, the positive electrode of the diode D13 is connected with the S electrode of the field effect tube Q4, the 1-pin of the optical coupler U14 and the ground wire through the resistor R83, the resistor R88 and the resistor R91 respectively, the 2-pin of the optical coupler U14 is connected with the negative electrode of the diode D14, the positive electrode of the diode D14 is connected with the ground wire, the 4-pin of the optical coupler U14 is connected with the BAT3V3 power supply through the resistor R89, and the 3-pin is connected with the ground wire, the 4-pin of the optical coupler U14 is also connected with the base electrode of the triode Q5 through the resistor R92, the base electrode of the triode Q5 is connected with an IO port of the main controller U20 through the resistor R93, and the connection network number is BAT_EN, the collector electrode of the triode Q5 is connected with the G electrode of the field effect tube Q4 through the resistor R87, and the emitter electrode is connected with the ground wire, and the resistor R90 and the capacitor C75 are connected in parallel between the base electrode and the emitter electrode of the triode Q5.

[0145] The S electrode of the field effect tube Q4 is connected with the 12V0 power supply, the D electrode is connected with the positive electrode of the diode D11, and the negative electrode of the diode D11 outputs the YOUT standby power supply.

[0146] The resistor R84 and the capacitor C74 are connected in parallel between the S pole and the G pole of the field effect tube Q4, the positive pole of the diode D11 is connected to the emitter of the triode Q5 through the resistor R85;

[0147] In this embodiment, the signal of the emergency switch (emergency signal_IN) is input into the battery switch circuit through the diode D13, and the emergency signal BAT_EN generated by the main controller U20 is input into the battery switch circuit through the resistor R93, and the two are in an or relationship;

[0148] The triode Q5 and the field effect tube Q4 constitute an electronic switch. When the emergency signal BAT_EN or the signal of the emergency switch takes effect, the triode Q5 is turned on, causing the field effect tube Q4 to be turned on, so that the 12V0 power supply output by the battery management module can be input onto the Schottky diode D11, thereby outputting a 24V0 power supply for emergency use. The power supply is also input into the input end of the DC-DC module U5, thereby providing an emergency battery power supply.

[0149] In this embodiment, whether the main controller U20 generates the emergency signal BAT_EN is determined by acquiring the data of the acceleration sensor U22 and cooperating with the data of the Beidou terminal. The user can define the conditions for entering the emergency state according to actual needs.

[0150] The beacon machine power supply sampling circuit is a resistance voltage sampling circuit.

[0151] In this embodiment, the beacon machine power supply sampling circuit includes an 8V0 power supply sampling circuit, a 7V0 power supply sampling circuit, a BAT power supply sampling circuit, a 24V0 power supply sampling circuit, a 12V0 power supply sampling circuit, and a 3V3 power supply sampling circuit. These sampling circuits are all resistance voltage sampling circuits. Taking the 24V0 power supply sampling circuit as an example, it is divided by the resistor R158 and the resistor R162, and then the collected voltage value is input into an AD interface of the main controller U20, and the circuit network number is 24V0_BIT. In this embodiment, a TVS tube DE11 is also connected in parallel with the resistor R162 to perform TVS isolation. The circuit principles of the other sampling circuits are the same as those of the 24V0 power supply sampling circuit.

[0152] The input isolation circuit and the output isolation circuit are both switching quantity optocoupler isolation circuits.

[0153] In this embodiment, the input end of the input isolation circuit is connected to an external emergency switch through the 8th pin of the interface JP17. The output end of the output isolation circuit is connected to and drives an external LED lamp through the 9th pin of the interface JP17.

[0154] The host includes a host power supply circuit and a host control unit, the host control unit includes a host controller U2, and the host control unit is electrically connected with a host communication unit, a host temperature sensor, a host acceleration sensor and a host power supply sampling circuit respectively;

[0155] The input end of the host power supply circuit is connected with an external 24V power supply and a YOUT backup power supply respectively, and the output end is used for supplying power for the host control unit;

[0156] The host communication unit includes three communication modules, which are electrically connected with and communicate with an external To integrated display device, a beacon machine communication unit and a Beidou terminal respectively;

[0157] The host power supply sampling circuit is used for collecting the voltage generated by the host power supply circuit.

[0158] The host power supply circuit includes a second power supply interface, an emergency power supply interface, a second TVS module and a second DC power supply module, the second power supply interface is an interface JP1, the 3-pin of the interface JP1 is connected with an external 24V power supply, the 2-pin is connected with a ground wire, and the 1-pin of the interface JP1 is also connected with an external starting switch;

[0159] The emergency power supply interface is an interface JP9, the 1-pin of the interface JP9 is connected with a YOUT backup power supply, and the 2-pin is connected with a ground wire;

[0160] The second TVS module is a TVS protection circuit composed of a TVS tube DR1 and a P-channel field effect transistor IC1;

[0161] The second DC power supply module is a 24V-3.3V voltage stabilizing circuit composed of a DC-DC module IC1 and its peripheral circuit, the DC-DC module IC1 outputs a Z3V3 power supply, and the model of the DC-DC module IC1 is SY8113C1ADC.

[0162] The host communication unit includes a communication module A, a communication module B and a communication module C, the communication module A includes an external communication interface A and a host 422 unit A, and the external communication interface A is an interface JP11;

[0163] The circuit principle of the communication module A, the communication module B and the communication module C is same as that of the beacon machine communication unit, and all of them are 422 communication.

[0164] The host 422 unit A is composed of a 422 module U1 and its peripheral circuit, the 4-pin, the 5-pin, the 6-pin and the 7-pin of the interface JP11 are connected with the output end of the host 422 unit A; and the host 422 unit A is responsible for communicating with an external To integrated display device;

[0165] The host 422 unit B is composed of the 422 module U3 and its peripheral circuit, the 1st pin, the 2nd pin, the 3rd pin and the 4th pin of the interface JP12 are connected with the output end of the host 422 unit B; the host 422 unit B is responsible for communication with the Beidou terminal;

[0166] The host 422 unit C is composed of the 422 module U6 and its peripheral circuit, the 1st pin, the 2nd pin, the 3rd pin and the 4th pin of the interface JP7 are connected with the output end of the host 422 unit C; the interface JP7 is connected with the interface JP17, the host 422 unit C is responsible for communication with the beacon machine 422 unit; the 7th pin of the interface JP7 is also connected with the external LED lamp, the 6th pin is also connected with the external emergency switch;

[0167] The host temperature sensor is composed of the sensor U10 and its peripheral circuit, the model of the sensor U10 is LM75A;

[0168] The host acceleration sensor is composed of the sensor U11 and its peripheral circuit, the model of the sensor U11 is LSM6DSV16X;

[0169] The main controller U2, the host communication unit, the host temperature sensor and the host acceleration sensor are all powered by the Z3V3 power supply;

[0170] The host power supply sampling circuit is responsible for collecting the voltage of the 3rd pin of the interface JP1 and the voltage of the Z3V3 power supply; the host power supply sampling circuit is a resistance voltage collection circuit, in the embodiment, the host power supply sampling circuit includes the 24V sampling circuit and the Z3V3 power supply sampling circuit, both of which are voltage sampling circuits, taking the 24V sampling circuit as an example, it is composed of the resistor R75, the resistor R77 and the TVS tube DE1, which is used to collect the 24V voltage of the 3rd pin of the interface JP1 (circuit network number is 24V0IN), and output the sampling value to an AD interface of the main controller U2, the network number is recorded as 24V0_BIT; the Z3V3 power supply sampling circuit is connected to another AD interface of the main controller U2, the network number is recorded as 3V3_BIT.

[0171] The host is mainly responsible for processing the data of the Beidou terminal and the beacon machine, data interconnection with the airborne platform system and other devices, and simultaneously controlling the power indicator light and the emergency state indicator light.

[0172] When receiving the beacon machine entering the emergency mode message instruction, the control instruction is sent to turn on the emergency state indicator light.

[0173] In the embodiment, the host can communicate with the same airborne platform or control center in the global range through the Beidou terminal and short message, and can also assist in navigation through positioning.

[0174] The beacon machine has a manual emergency working mode and an automatic emergency working mode.

[0175] The utility model discloses a beidou beacon machine system for airborne platform has solved the technical problem of emergency positioning switching circuit design and beacon transmission power supply circuit design of beidou beacon machine system, and the utility model discloses main machine system can be switched into battery power supply under non-emergency state, reduces energy consumption, prolongs equipment life.

Claims

1. A Beidou beacon system for an airborne platform, characterized in that: The beacon machine, the host computer and the Beidou terminal are included, and the beacon machine and the Beidou terminal respectively communicate with the host computer through two 422 buses; The beacon machine includes a radio frequency transmitting module, a beacon antenna, a lithium battery pack, a beacon machine power supply circuit and a beacon machine control unit, the beacon machine control unit includes a main controller U20, and a radio frequency 8V power supply enabling circuit, a radio frequency 7V power supply enabling circuit, a beacon machine communication unit, a beacon machine temperature sensor, a beacon machine power supply sampling circuit, a beacon machine acceleration sensor, an input isolation circuit, an output isolation circuit, a battery switch circuit, an SD card slot and a TF slot which are electrically connected with the main controller U20 respectively; The input end of the beacon machine power supply circuit is connected with an external 24V power supply and the lithium battery pack, and the output end supplies power for the beacon machine control unit and the radio frequency transmitting module, and the radio frequency transmitting module is connected with the beacon antenna; The output end of the beacon machine power supply circuit also outputs a YOUT backup power supply; The beacon machine power supply sampling circuit is used for collecting the voltage generated by the beacon machine power supply circuit; The host computer includes a host computer power supply circuit and a host computer control unit, the host computer control unit includes a main controller U2, and a host computer communication unit, a host computer temperature sensor, a host computer acceleration sensor and a host computer power supply sampling circuit which are electrically connected with the main controller U2 respectively; The input end of the host computer power supply circuit is connected with an external 24V power supply and the YOUT backup power supply, and the output end supplies power for the host computer control unit; The host computer communication unit includes three communication modules, which are electrically connected with and communicate with an external To integrated display device, the beacon machine communication unit and the Beidou terminal respectively; The host computer power supply sampling circuit is used for collecting the voltage generated by the host computer power supply circuit.

2. The Beidou beacon system for airborne platform according to claim 1, characterized in that: The beacon machine power supply circuit includes a first power supply interface, a first TVS module, a first DC power supply module, a voltage stabilizing module, a 3.3V voltage stabilizing module, an 8V voltage stabilizing module, a 7V voltage stabilizing module, a -5V voltage stabilizing module, a battery interface, a second TVS module, a battery management module and an emergency power supply circuit; The first power supply interface is used for connecting an external 24V power supply, the first power supply interface is connected with the first TVS module, and the first TVS module outputs a 24V0 power supply; The first DC power supply module, the 8V voltage stabilizing module, the 7V voltage stabilizing module and the -5V voltage stabilizing module are connected with the 24V0 power supply, and the first DC power supply module, the 8V voltage stabilizing module, the 7V voltage stabilizing module and the -5V voltage stabilizing module respectively output a 5V0 power supply, an 8V0 power supply, a 7V0 power supply and an RF-5V0 power supply; The voltage stabilizing module and the 3.3V voltage stabilizing module are connected with the 5V0 power supply, and the voltage stabilizing module and the 3.3V voltage stabilizing module respectively output a 3V3 power supply and an RF3V3 power supply; The enabling end of the 3.3V voltage stabilizing module is connected with an IO port of the main controller U20; The battery interface is used for connecting a lithium battery pack, the battery interface is connected with the second TVS module, and the second TVS module outputs a BAT power supply; The battery management module is connected with the BAT power supply and respectively outputs a BAT3V3 power supply and a 12V0 power supply; The input end of the emergency power supply circuit is connected with a 3V3 power supply, an RF-5V0 power supply and an RF3V3 power supply, and the corresponding output is a 3.3VTTL power supply, a -5V power supply and a +3.3V power supply, which provide working voltages for the radio frequency transmitting module.

3. The Beidou beacon system for airborne platform according to claim 2, wherein: The input end of the radio frequency 8V power supply circuit is connected with an 8V0 power supply, and the output end outputs an RF8V0 power supply, and the enable end is connected with one IO port of the main controller U20; The input end of the radio frequency 7V power supply circuit is connected with a 7V0 power supply, and the output end outputs an RF7V0 power supply, and the enable end is connected with one IO port of the main controller U7; The input end of the emergency power supply circuit is also connected with an RF8V0 power supply and an RF7V0 power supply, and the corresponding output is also a +8V power supply and a +7V power supply, which are used for providing working voltages for the radio frequency transmitting module; The beacon machine communication unit includes a beacon machine 422 unit and a first external communication interface, the beacon machine 422 unit communicates with one serial port USART1 of the main controller U20 through a serial port bus, the beacon machine 422 unit is connected with the first external communication interface, and the first external communication interface communicates with one communication module of the host computer communication unit; the beacon machine 422 unit is powered by a 3V3 power supply; The beacon machine 422 unit is composed of a 422 module U18 and a peripheral circuit thereof, and the 422 module U18 is of a MAX3490 type; The first external communication interface is an interface JP17, the 2nd pin, the 3rd pin, the 4th pin and the 5th pin of the interface JP17 are connected with the output end of the beacon machine 422 unit, and the 2nd pin and the 3rd pin of the 422 module U18 are respectively connected with one serial port USART1 of the main controller U20 through a resistor R120 and a resistor R123; The beacon machine temperature sensor and the beacon machine acceleration sensor are respectively connected with the main controller U20 through an I2C interface and an SPI interface, and both the beacon machine temperature sensor and the beacon machine acceleration sensor are powered by a 3V3 power supply; The beacon machine temperature sensor is composed of a sensor U21 and a peripheral circuit thereof, and the sensor U21 is of an LM75A type; The beacon machine acceleration sensor is composed of a sensor U22 and a peripheral circuit thereof, and the sensor U22 is of an LSM6DSV16X type; The beacon machine power supply sampling circuit is used for sampling voltage values of the 8V0 power supply, the 7V0 power supply, the BAT power supply, the 24V0 power supply, the 12V0 power supply and the 3V3 power supply respectively, and is connected with six AD interfaces of the main controller U20 respectively; The input end of the input isolation circuit is connected with an external emergency switch, and the output end is connected with one IO port of the main controller U20; The input end of the output isolation circuit is connected with one IO port of the main controller U20, and the output end is connected with and drives one external LED lamp; The input end of the battery switch circuit is connected with a 12VO power supply and a BAT3V3 power supply, the output end outputs a YOUT backup power supply, and the enable end is connected with one IO port of the main controller U20; the voltage value of the YOUT backup power supply is 24V; Both the SD slot and the TF slot are connected with the main controller U20 through the same group of SPI buses, and are both powered by a 3V3 power supply.

4. The Beidou beacon system for airborne platform according to claim 3, wherein: The first TVS module is a TVS protection circuit composed of a TVS tube DR14 and a P-channel field effect transistor Q2; The first DC power supply module is a 24V-5V voltage stabilizing circuit composed of a DC-DC module U5 and its peripheral circuit, and the model of the DC-DC module U5 is SY8113C1ADC; The voltage stabilizing module is a voltage stabilizing circuit composed of a voltage stabilizer U9 and its peripheral circuit, and the model of the voltage stabilizer U9 is LT1963AEST-3.3; The 3.3V voltage stabilizing module is a voltage stabilizing circuit composed of a voltage stabilizing module U23 and its peripheral circuit, and the model of the voltage stabilizing module U23 is LT1963AEST-3.3; The 8V voltage stabilizing module is a 24V-to-8V DC-DC voltage stabilizing circuit composed of a voltage stabilizing module U17 and its peripheral circuit, and the model of the voltage stabilizing module U17 is SY8113C1ADC; The 7V voltage stabilizing module is a 24V-to-7V DC-DC voltage stabilizing circuit composed of a voltage stabilizing module U19 and its peripheral circuit, and the model of the voltage stabilizing module U19 is SY8113C1ADC; The -5V voltage stabilizing module is a 24V-to-5V DC-DC voltage stabilizing circuit composed of a voltage stabilizing module U24 and its peripheral circuit, and the model of the voltage stabilizing module U24 is SY8113C1ADC; The battery interface is the interface J14, and the second TVS module is a TVS protection circuit composed of a TVS tube DR27 and a P-channel field effect transistor Q3; The battery management module is composed of a battery management chip U8 and its peripheral circuit, and the model of the battery management module is LTC4006; The emergency power supply circuit includes the interface JP22, the capacitors C127, C128, C129, C130, C131, C132, C133, C134, the magnetic beads L51, L52, L53, L54 and L55; One end of the magnetic bead L51 is connected to the RF8V0 power supply, and the other end is connected to the 6-pin of the interface JP22, and the capacitors C127 and C134 are filter capacitors for the two ends of the magnetic bead L51 respectively; One end of the magnetic bead L52 is connected to the RF-5V0 power supply, and the other end is connected to the 6-pin of the interface JP5, and the capacitors C128 and C133 are filter capacitors for the two ends of the magnetic bead L52 respectively; One end of the magnetic bead L53 is connected to the 3V3TTL power supply, and the other end is connected to the 4-pin of the interface JP22; the 3V3TTL power supply is obtained through the 3V3 power supply; One end of the magnetic bead L54 is connected to the RF3V3 power supply, and the other end is connected to the 3-pin of the interface JP22, and the capacitors C129 and C132 are filter capacitors for the two ends of the magnetic bead L54 respectively; One end of the magnetic bead L55 is connected to the RF7V0 power supply, and the other end is connected to the 2-pin of the interface JP22, and the capacitors C130 and C131 are filter capacitors for the two ends of the magnetic bead L55 respectively; The 1-pin of the interface JP22 is connected to the ground wire, the 2-pin outputs the +7V power supply, the 3-pin outputs the +3.3V power supply, the 4-pin outputs the 3.3VTTL power supply, the 5-pin outputs the -5V power supply, and the 6-pin outputs the +8V power supply; The model of the main controller U20 is an STM32F103RBT6 single-chip microcomputer.

5. The Beidou beacon system for airborne platform according to claim 4, wherein: The battery switch circuit comprises a diode D13, a resistor R91, a resistor R83, a resistor R88, a resistor R84, a capacitor C74, a field effect tube Q4, a resistor R89, an optical coupler U14, a diode D14, a resistor R87, a resistor R92, a triode Q5, a resistor R85, a diode D11, a resistor R90, a capacitor C75 and a resistor R93; The negative electrode of the diode D13 is connected with an external emergency signal, the positive electrode of the diode D13 is connected with the S electrode of the field effect tube Q4, the 1 pin of the optical coupler U14 and the ground wire through the resistors R83, R88 and R91 respectively, the 2 pin of the optical coupler U14 is connected with the negative electrode of the diode D14, the positive electrode of the diode D14 is connected with the ground wire, the 4 pin of the optical coupler U14 is connected with the BAT3V3 power supply through the resistor R89, the 3 pin is connected with the ground wire, the 4 pin of the optical coupler U14 is also connected with the base electrode of the triode Q5 through the resistor R92, the base electrode of the triode Q5 is connected with an IO port of the main controller U20 through the resistor R93, and the connection network number is BAT_EN; the collector electrode of the triode Q5 is connected with the G electrode of the field effect tube Q4 through the resistor R87, and the emitter electrode is connected with the ground wire; the resistor R90 and the capacitor C75 are connected in parallel between the base electrode and the emitter electrode of the triode Q5; The S electrode of the field effect tube Q4 is connected with the 12V0 power supply, the D electrode is connected with the positive electrode of the diode D11, and the negative electrode of the diode D11 outputs the YOUT standby power supply; The resistor R84 and the capacitor C74 are both connected in parallel between the S electrode and the G electrode of the field effect tube Q4, and the positive electrode of the diode D11 is connected with the emitter electrode of the triode Q5 through the resistor R85; The beacon machine power supply sampling circuit is a resistor type voltage sampling circuit; Both the input isolation circuit and the output isolation circuit are switch quantity optical coupler isolation circuits.

6. The Beidou beacon system for airborne platforms according to claim 1, characterized in that: The main machine power supply circuit comprises a second power supply interface, an emergency power supply interface, a second TVS module and a second DC power supply module, the second power supply interface is an interface JP1, the 3 pin of the interface JP1 is connected with an external 24V power supply, and the 2 pin is connected with the ground wire; the 1 pin of the interface JP1 is also connected with an external starting switch; The emergency power supply interface is an interface JP9, the 1 pin of the interface JP9 is connected with the YOUT standby power supply, and the 2 pin is connected with the ground wire; The second TVS module is a TVS protection circuit composed of a TVS tube DR1 and a P-channel field effect transistor IC1; The second DC power supply module is a 24V-3.3V voltage stabilizing circuit composed of a DC-DC module IC1 and its peripheral circuit, the DC-DC module IC1 outputs a Z3V3 power supply, and the model of the DC-DC module IC1 is SY8113C1ADC.

7. The Beidou beacon system for airborne platforms according to claim 6, characterized in that: The main machine communication unit comprises a communication module A, a communication module B and a communication module C, the communication module A comprises an external communication interface A and a main machine 422 unit A, and the external communication interface A is an interface JP11; The main machine 422 unit A is composed of a 422 module U1 and its peripheral circuit, the 4 pin, the 5 pin, the 6 pin and the 7 pin of the interface JP11 are all connected with the output end of the main machine 422 unit A; the main machine 422 unit A is responsible for communication with an external To synthesis display device; The host 422 unit B is composed of the 422 module U3 and its peripheral circuit, the 1st pin, the 2nd pin, the 3rd pin and the 4th pin of the interface JP12 are connected with the output end of the host 422 unit B; the host 422 unit B is responsible for communication with the Beidou terminal; The host 422 unit C is composed of the 422 module U6 and its peripheral circuit, the 1st pin, the 2nd pin, the 3rd pin and the 4th pin of the interface JP7 are connected with the output end of the host 422 unit C; the interface JP7 is connected with the interface JP17, the host 422 unit C is responsible for communication with the beacon 422 unit; the 7th pin of the interface JP7 is also connected with the external LED lamp, the 6th pin is also connected with the external emergency switch; The host temperature sensor is composed of the sensor U10 and its peripheral circuit, the model of the sensor U10 is LM75A; The host acceleration sensor is composed of the sensor U11 and its peripheral circuit, the model of the sensor U11 is LSM6DSV16X; The main controller U2, the host communication unit, the host temperature sensor and the host acceleration sensor are all powered by the Z3V3 power supply; The host power supply sampling circuit is responsible for collecting the voltage of the 3rd pin of the interface JP1 and the voltage of the Z3V3 power supply; the host power supply sampling circuit is a resistance type voltage collection circuit.

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