Wireless communication link switching system and apparatus

Abstract

Provided are a wireless communication link switching system and apparatus. The system comprises a signal transmission device and a signal switching device. The signal transmission device comprises a battery module, a main control circuit, a signal comparison circuit, a signal receiving circuit, and at least two communication modules, wherein the battery module is separately connected to the main control circuit, the signal comparison circuit, the signal receiving circuit and the at least two communication modules; the main control circuit is separately connected to the signal comparison circuit, the signal receiving circuit and the at least two communication modules; the signal comparison circuit is connected to the signal receiving circuit; and the signal receiving circuit is connected to the at least two communication modules.

Description

Wireless communication link switching system and apparatus

[0001] The present application claims priority to the Chinese patent application No. 202421954099.4, filed on August 13, 2024, to the Chinese Patent Office, the whole content of the above application being incorporated herein by reference. TECHNICAL FIELD

[0002] Embodiments of the present application relate to the field of communication technology, for example to a wireless communication link switching system and apparatus. BACKGROUND

[0003] In marine communication, due to the harsh environment of the sea, the stability of the wireless network communication connection of the ship is crucial to its safe operation. For example, in marine communication, the wireless network communication system of the ship in the related art includes a host and a signal transmission device. The main function of the signal transmission device is to send the signal processed by the host through a wireless manner, and to receive the wireless signal sent by other wireless devices at a remote end and output to the host for processing (such as the host transmitting its own navigation data, or receiving the instruction data of the remote manager, etc.).

[0004] Currently, the signal transmission device of the ship communication is realized by connecting the 5G communication module and the satellite communication module in parallel. In actual application, the technical personnel generally understand the signal strength of the current wireless communication by observing the light-emitting condition of the self-signal indicating LED lamp of the host (the light-emitting brightness of the LED lamp bead becomes higher when the signal is strong; on the contrary, the light-emitting brightness of the LED lamp bead becomes lower or stops emitting light when the signal is weak), so as to manually close or open the 5G communication module or the satellite communication module when the light-emitting brightness of the LED lamp bead is observed to be low or to stop emitting light, so that the communication module with strong signal strength is connected with the host (when two communication modules are connected with the host at the same time, signal interference will be generated, so only one communication module can be connected with the host).

[0005] Although the above-mentioned method can meet the communication demand, the technical personnel need to go to the device to visually find the signal strength of the current module. When the signal of the current communication module becomes weak, if the technical personnel do not timely switch the channel, it will adversely affect the data transmission and reception of the host, and affect the safe navigation of the ship.

[0006] SUMMARY

[0007] Embodiments of the present application provide a wireless communication link switching system and apparatus, which can improve the switching convenience of the communication link, guarantee the integrity of the communication data, and improve the safety of navigation.

[0008] In a first aspect, the embodiments of the present application provide a wireless communication link switching system, the system comprising a signal transmission device and a signal switching device; the signal transmission device and the signal switching device are wirelessly connected.

[0009] The signal transmission device comprises a battery module, a main control circuit, a signal comparison circuit, a signal receiving circuit and at least two communication modules; the battery module is connected with the main control circuit, the signal comparison circuit, the signal receiving circuit and the at least two communication modules respectively; the main control circuit is connected with the signal comparison circuit, the signal receiving circuit and the at least two communication modules respectively; the signal comparison circuit is connected with the signal receiving circuit; the signal receiving circuit is connected with the at least two communication modules.

[0010] The signal receiving circuit is configured to control a corresponding target communication module to access a link according to a received target communication signal; the main control circuit is configured to obtain a current signal strength generated by a target communication module; the signal comparison circuit is configured to generate a link switching signal when the current signal strength is not greater than a preset signal strength; and the signal switching device is configured to switch a communication link corresponding to the target communication module when the link switching signal is received.

[0011] Optionally, the main control circuit comprises a host and a light-emitting tube; the signal comparison circuit comprises a signal comparison unit and a signal transmitting unit; the signal receiving circuit comprises a wireless receiving unit and at least two relays; the host and the light-emitting tube are connected in parallel, the light-emitting tube and the comparison unit are connected, the comparison unit and the signal transmitting unit are connected in series; the wireless receiving unit comprises at least two output ends, one output end of the wireless receiving unit and one relay are connected, and one relay and one communication module are connected in series.

[0012] Optionally, the signal comparison unit comprises an operational amplifier, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor and a transistor; the battery module comprises a positive power output end and a negative power output end; one end of the first resistor is connected with the light-emitting tube; the other end of the first resistor is connected with the second resistor and the inverting input end of the operational amplifier respectively; the positive power output end is connected with one end of the third resistor, and the other end of the third resistor is connected with one end of the fourth resistor and the non-inverting input end of the operational amplifier respectively; the other end of the fourth resistor is connected with the negative power output end, the negative power input end of the operational amplifier and the emitter of the transistor respectively; one end of the fifth resistor is connected with the output end of the operational amplifier, and the other end of the fifth resistor is connected with the base of the transistor; the positive power input end of the signal transmitting unit is connected with the positive power input end of the operational amplifier, the host, the positive power output end and one end of the third resistor respectively; the negative power input end of the signal transmitting unit is connected with the collector of the transistor.

[0013] Optionally, the signal transmitting unit comprises a signal transmitting button; two signal transmitting contacts in the signal transmitting button are connected.

[0014] Optionally, the at least two relays comprise a first relay and a second relay; the wireless receiving unit comprises a first output end and a second output end, wherein: the positive power input end of the wireless receiving unit is connected with the power input end of the signal transmitting unit, the first relay and the second relay respectively; the negative power input end of the first relay and the negative power input end of the second relay are connected with the negative power input end of the wireless receiving unit respectively; the first output end of the wireless receiving unit is connected with the positive power input end of the first relay, and the second output end of the wireless receiving unit is connected with the positive power input end of the second relay.

[0015] Optionally, the at least two communication modules comprise a 5G communication module and a satellite communication module; wherein the 5G communication module and the satellite communication module are connected with the host respectively; the 5G communication module is connected with the first relay, and the satellite communication module is connected with the second relay; or, the 5G communication module is connected with the second relay, and the satellite communication module is connected with the first relay.

[0016] Optionally, the signal switching device comprises a signal switching unit and a signal receiving unit, and the signal switching unit and the signal receiving unit are connected in parallel.

[0017] Optionally, the signal switching device further comprises a buzzer and a power switch; wherein the power switch is connected in parallel with the signal switching unit and the signal receiving unit respectively; and the buzzer and the signal receiving unit are connected in series.

[0018] Optionally, the signal switching unit comprises at least two signal switching buttons, and one signal switching button controls the communication signal of one corresponding communication module.

[0019] In a second aspect, an embodiment of the present application provides a wireless communication link switching device, comprising an integrated wireless communication link switching system as described in any of the embodiments of the present application.

[0020] The wireless communication link switching system and device provided by the embodiments of the present application, the system comprises a signal transmission device and a signal switching device. Wherein, the signal transmission device and the signal switching device are wirelessly connected. The signal transmission device provided by the embodiments of the present application comprises a battery module, a main control circuit, a signal comparison circuit, a signal receiving circuit and at least two communication modules. The signal receiving circuit controls the access of the corresponding target communication module to the link according to the received target communication signal. The main control circuit obtains the current signal strength generated by the target communication module. The signal comparison circuit generates a link switching signal when the current signal strength is not greater than the preset signal strength. The signal switching device switches the communication link corresponding to the target communication module when receiving the link switching signal. The scheme provided by the embodiments of the present application can detect the signal strength of the target communication module accessing the link in real time through the main control circuit, and can remotely switch the communication link through the signal switching device when the current signal strength is not greater than the preset signal strength, thereby improving the switching convenience of the link channel. The method of monitoring by the technical personnel near the signal transmission device in the related art is improved, manpower is saved, the integrity of the communication data is ensured, and the beneficial effect of improving the safety of navigation is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0021] FIG. 1 is a structural schematic diagram of a wireless communication link switching system according to an embodiment of the present application.

[0022] FIG. 2 is a structural schematic diagram of a signal transmission device according to an embodiment of the present application.

[0023] FIG. 3 is a structural schematic diagram of a signal transmission device according to an embodiment of the present application.

[0024] FIG. 4 is a structural schematic diagram of a signal switching device according to an embodiment of the present application.

[0025] FIG. 5 is a structural schematic diagram of a wireless communication link switching device according to an embodiment of the present application. DETAILED DESCRIPTION

[0026] The application will be described in further detail below with reference to the drawings and embodiments. It is to be understood that the specific embodiments described herein are intended to be illustrative only and not limiting of the application. In addition, it is to be understood that the drawings are not necessarily to scale and that, unless otherwise indicated, the drawings are intended to be illustrative only and not limiting of the application.

[0027] Fig. 1 is a structural schematic diagram of a wireless communication link switching system provided by an embodiment of the application. The embodiment can be applied to monitor the signal strength of a target communication module when a signal transmission device communicates based on the target communication module, and can timely switch the target communication module of an access link when the signal strength of the target communication module is weak.

[0028] The wireless communication link switching system provided by the embodiment of the application includes a signal transmission device 100 and a signal switching device 200. Specifically, refer to Fig. 1, which includes a structural schematic diagram of a signal transmission device provided by the embodiment of the application and a structural schematic diagram of a signal switching device provided by the embodiment of the application.

[0029] In the embodiment, the signal transmission device 100 and the signal switching device 200 are wirelessly connected. The purpose of such arrangement is to, when the signal transmission device 100 detects that the signal strength of a target communication module currently accessing a communication link is weak, switch the communication link corresponding to the target communication module remotely through the signal switching device 200 by sending a link switching signal to the signal switching device 200. In the implementation process of the scheme, technical personnel do not need to stand beside the signal transmission device 100 to monitor, and technical personnel at the remote end take the beneficial effects of saving manpower, ensuring the integrity of communication data, and improving the safety of navigation by switching the communication link through the signal switching device 200.

[0030] Preferably, refer to Fig. 1, the signal transmission device 100 provided by the embodiment specifically includes a battery module 110, a main control circuit 120, a signal comparison circuit 130, a signal receiving circuit 140, and at least two communication modules 150; the battery module 110 is connected with the main control circuit 120, the signal comparison circuit 130, the signal receiving circuit 140, and the at least two communication modules 150 respectively; the main control circuit 120 is connected with the signal comparison circuit 130, the signal receiving circuit 140, and the at least two communication modules 150 respectively; the signal comparison circuit 130 and the signal receiving circuit 140 are connected; and the signal receiving circuit 140 and the at least two communication modules 150 are connected.

[0031] In the embodiment, the battery module 110 is connected with the 220V AC power supply, so as to provide stable DC voltage for the main control circuit 120, the signal comparison circuit 130, the signal receiving circuit 140 and the at least two communication modules 150 through the battery module 110. When the circuits in the signal transmission device 100 are powered on, the signal switching device 200 also works in the powered-on state, and the signal transmission device 100 and the signal switching device 200 are wirelessly connected in communication.

[0032] Further, the signal transmission device 100 and the signal switching device 200 are wirelessly connected in communication in the embodiment, and the automatic switching of the target communication module of the access link is realized in the following manner: the signal receiving circuit 140 is configured to control the corresponding target communication module to access the link according to the received target communication signal; the main control circuit 120 is configured to obtain the current signal strength generated by the target communication module; the signal comparison circuit 130 is configured to generate a link switching signal when the current signal strength is not greater than the preset signal strength; and the signal switching device 200 is configured to switch the communication link corresponding to the target communication module when the link switching signal is received.

[0033] In the embodiment, the signal transmission device 100 and the signal switching device 200 are wirelessly connected in communication, and the essence is that the signal receiving circuit 140 and the signal comparison circuit 130 are integrated with communication components, so as to realize communication connection with the signal switching device 200.

[0034] Specifically, after the signal transmission device 100 and the signal switching device 200 are communicatively connected, since it is not clear which communication module corresponding to the stronger signal strength in the current environment when accessing the target communication module for the first time, a communication signal corresponding to an arbitrary communication module in the signal switching device 200 can be selected as a target communication signal corresponding to the target communication module when accessing the target communication module for the first time, and then when the target communication signal is received by the signal receiving circuit 140, the target communication module corresponding to the target communication signal is controlled to access the link; further, the main control circuit 120 can obtain the current signal strength of the target communication module according to the data transmission condition of the target communication module; and then the signal comparison circuit 130 compares the current signal strength with the preset signal strength, and when the current signal strength is higher than the preset signal strength, the target communication module accessing the link is maintained unchanged; until the current signal strength is not higher than the preset signal strength is monitored, the signal comparison circuit 130 generates a link switching signal, so that when the signal switching device 200 receives the link switching signal, the target communication signal can be converted into a communication link corresponding to another communication module, so that the communication signal corresponding to another communication module is updated as the target communication signal, so that after the signal receiving circuit 140 receives the updated target communication signal, the operation of controlling the target communication module corresponding to the updated target communication signal to access the link is repeatedly performed, so as to achieve the purpose of real-time monitoring of the communication signal in the wireless communication link switching system.

[0035] In the present embodiment, the at least two communication modules 150 are not limited to including 5G communication modules and satellite communication modules, but can also include spread spectrum microwave communication, data radio communication, Bluetooth transmission, and wireless broadband transmission, etc., which is related to the actual application scenario.

[0036] The wireless communication link switching system provided by the embodiment of the present application comprises a signal transmission device and a signal switching device. The signal transmission device and the signal switching device are wirelessly connected. The signal transmission device comprises a battery module, a main control circuit, a signal comparison circuit, a signal receiving circuit and at least two communication modules. The signal receiving circuit controls the corresponding target communication module to access a link according to a received target communication signal. The main control circuit obtains a current signal strength generated by the target communication module. The signal comparison circuit generates a link switching signal when the current signal strength is not greater than a preset signal strength. The signal switching device switches the communication link corresponding to the target communication module when the link switching signal is received. The main control circuit can detect the signal strength of the target communication module accessing the link in real time, and can remotely switch the communication link through the signal switching device when the current signal strength is not greater than the preset signal strength, thereby improving the switching convenience of the link channel. The method of monitoring the signal transmission device by a technician in the related art is improved, manpower is saved, the integrity of the communication data is ensured, and the safety of navigation is improved.

[0037] Please refer to FIG. 2, which is a structural schematic diagram of a signal transmission device provided by an embodiment of the present application. The relationship between the embodiment of the present application and the embodiment provided in FIG. 1 is that the embodiment of the present application further refines the corresponding features of the signal transmission device provided in the embodiment of FIG. 1.

[0038] Specifically, the main control circuit 120 comprises a host 121 and a light-emitting tube 122 in the embodiment of the present application. The host 121 and the light-emitting tube 122 are connected in parallel, so that the signal strength of the host 121 and the target communication module generating the transceiving signal is reflected by the brightness of the light-emitting tube 122.

[0039] In the embodiment of the present application, the signal comparison circuit 130 comprises a signal comparison unit 131 and a signal transmission unit 132, which are connected in series. When the signal comparison unit 131 compares that the current signal strength is not greater than the preset signal strength, the signal transmission unit 132 is controlled to send a link switching signal to the signal switching device 200.

[0040] Optionally, when the brightness of the light-emitting tube 122 reflects the signal strength, the higher the signal strength is, the higher the current input voltage of the light-emitting tube is, and vice versa. Therefore, the light-emitting tube 122 and the signal comparison unit 131 are further connected in the embodiment of the present application, which is used to send the light-emitting voltage corresponding to the current light-emitting brightness of the light-emitting tube to the signal comparison unit 131, so that the signal comparison unit 131 compares the current light-emitting voltage with the preset voltage threshold, to obtain the relationship between the current signal strength and the preset signal strength.

[0041] In this embodiment, the signal receiving circuit 140 comprises a wireless receiving unit 141 and at least two relays. The wireless receiving unit 141 comprises at least two output terminals, one output terminal of the wireless receiving unit 141 is connected with one relay, and one relay is connected with one communication module in series. The purpose of this is that when the target communication signal generated by the signal switching device 200 is received by the wireless receiving unit 141, the target relay corresponding to the target communication signal is controlled to be closed, so that the target communication module corresponding to the target relay is accessed to the communication link.

[0042] Further, please refer to FIG. 3, which is a structural schematic diagram of a signal transmission device provided by an embodiment of the present application. The relationship between the embodiment provided by FIG. 3 and the embodiment provided by FIG. 2 is that the embodiment provided by FIG. 3 further refines the corresponding features of the signal transmission device provided by the embodiment of FIG. 2. In the following embodiments, the corresponding element names are described using electrical element symbols.

[0043] Before introducing FIG. 3, relevant descriptions are needed. In the example of FIG. 3, the signal transmitting unit 132 mentioned in the above embodiments is implemented by the signal transmitter T4 in FIG. 3, the wireless receiving unit 141 mentioned in the above embodiments is implemented by the wireless receiver T5 in FIG. 3, and the host 121 mentioned in the above embodiments can be implemented by the main controller T2 in FIG. 3. Specifically, in the following embodiments, the signal transmitter T4 will be used to replace the signal transmitting unit 132 in the above embodiments, the wireless receiver T5 will be used to replace the wireless receiving unit 141 in the above embodiments, and the main controller T2 will be used to replace the host 121 in the above embodiments.

[0044] The signal comparison unit 131 (not marked in FIG. 3) provided by the embodiment comprises an operational amplifier T3, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, and a triode Q1; and the battery module T1 (or the label 110) comprises a positive power output terminal a and a negative power output terminal b.

[0045] The one end of the first resistor R1 is connected with the light-emitting tube VL, and the other end of the first resistor R1 is connected with the second resistor R2 and the inverting input terminal c of the operational amplifier T3 respectively. The positive power output terminal a and the one end of the third resistor R3 are connected, and the other end of the third resistor R3 is connected with the one end of the fourth resistor R4 and the non-inverting input terminal d of the operational amplifier T3 respectively. The other end of the fourth resistor R4 is connected with the negative power output terminal b, the negative power input terminal e of the operational amplifier T3, and the emitter of the triode Q1 respectively. The one end of the fifth resistor R5 is connected with the output terminal f of the operational amplifier T3, and the other end of the fifth resistor R5 is connected with the base of the triode Q1.

[0046] The positive power input end h of the signal transmitter T4 is connected with the positive power input end g of the operational amplifier T3, the main controller T2, the positive power output end a and one end of the third resistor R3 respectively; the negative power input end i of the signal transmitter T4 is connected with the collector of the triode Q1.

[0047] In another implementation, the signal transmitter T4 comprises a signal transmission button D1; two signal transmission contacts in the signal transmission button D1 are connected. The two signal transmission contacts in the signal transmission button D1 are connected for making the signal transmitter T4 emit a link switching signal.

[0048] Preferably, the resistance of the first resistor R1 can be 8-12 kΩ, preferably 10 kΩ; the resistance of the second resistor can be 1.5-2.5 kΩ, preferably 2 kΩ; the resistance of the third resistor R3 can be 800-1000 Ω, preferably 900 Ω; the resistance of the fourth resistor R4 can be 1.8-2.5 kΩ, preferably 2.1 kΩ; the resistance of the fifth resistor R5 can be 2.0-2.5 kΩ, preferably 2.3 kΩ.

[0049] The model of the operational amplifier T3 provided in the embodiment can be UA741; the triode Q1 provided in the embodiment can be an NPN triode with the model 9013.

[0050] In another implementation, please continue to refer to FIG. 3. In the embodiment, the at least two relays comprise a first relay J1 and a second relay J2; the wireless receiver T5 comprises a first output end l and a second output end m, and correspondingly, the at least two communication modules 150 comprise a 5G communication module T6 and a satellite communication module T7.

[0051] The positive power input end j of the wireless receiver T5 is connected with the power input ends of the signal transmitter T4, the first relay J1 and the second relay J2 respectively; the negative power input ends of the first relay J1 and the second relay J2 are connected with the negative power input end k of the wireless receiver T5 respectively; the first output end l of the wireless receiver T5 is connected with the positive power input end of the first relay J1, and the second output end m of the wireless receiver T5 is connected with the positive power input end of the second relay J2.

[0052] The 5G communication module T6 and the satellite communication module T7 are connected with the main controller T2 respectively; the 5G communication module T6 is connected with the first relay J1, and the satellite communication module T7 is connected with the second relay J2; or, the 5G communication module T6 is connected with the second relay J2, and the satellite communication module T7 is connected with the first relay J1. The embodiment provides a connection mode that the relay and the communication module correspond to each other. The 5G communication module T6 and the satellite communication module T7 are both mature technologies, and the embodiment is not limited herein.

[0053] Preferably, the first relay J1 and the second relay J2 provided in the embodiment can be DC12V.

[0054] In another implementation, please refer to FIG. 4, which is a structural schematic diagram of a signal switching device provided in the embodiment. The relationship between the embodiment and the embodiment provided in FIG. 1 is that the embodiment further refines the corresponding features of the signal switching device provided in the embodiment of FIG. 1.

[0055] Specifically, please refer to FIG. 4, the signal switching device 200 provided in the embodiment includes a signal switching unit T9 and a signal receiving unit T8, and the signal switching unit T9 and the signal receiving unit T8 are connected in parallel. The signal receiving unit T8 is configured to receive the link switching signal transmitted by the signal transmitter T4, and the signal switching unit T9 is configured to switch the communication link corresponding to the target communication module.

[0056] In another preferred embodiment, please continue to refer to FIG. 4, the signal switching device provided in the embodiment further includes a buzzer B and a power switch S1 on the basis of the above-mentioned embodiment. The power switch S1 is connected in parallel with the signal switching unit T9 and the signal receiving unit T8 respectively; the buzzer B and the signal receiving unit T8 are connected in series. The power switch S1 is configured to control the power-on of the signal switching device 200, so as to realize the communication connection with the signal transmission device 100 in the power-on state. The buzzer B is configured to produce a buzzing sound when the signal receiving unit T8 receives the link switching signal, so as to remind the technical personnel to switch the link channel and improve the timeliness of the link channel switching.

[0057] The signal switching unit T9, the signal receiving unit T8, the wireless receiver T5 and the signal transmitter T4 provided in the embodiment can be realized by a finished product of a wireless transmitting component and a receiving component with a model ZDQ-4000.

[0058] In another preferred implementation, the signal switching unit T9 includes at least two signal switching buttons (D1-Dn in the example of FIG. 4, one symbol represents one signal switching button), and one signal switching button controls the corresponding communication signal of one communication module. For example, when the communication modules are the 5G communication module T6 and the satellite communication module T7, the corresponding signal switching buttons include the 5G switching button and the satellite switching button. Taking the current 5G switching button as an example, the wireless receiver T5 receives the corresponding 5G communication signal, thereby controlling the relay J2 to close, and then enabling the 5G communication module T6 to access the link, etc.

[0059] Optionally, in order to achieve the durability of the signal switching device 200, the signal switching device 200 further includes a battery G1 and a charging socket CZ1, so that when the battery G1 is out of power, the external 12V power charger plug can be inserted into the charging socket CZ1 to charge the battery G1.

[0060] Preferably, the battery in the embodiment is a lithium battery with a model of 10Ah / 12V; the buzzer B is an active continuous sound buzzer B alarm with a model of FM12V.

[0061] The wireless communication link switching system provided by the application carries out a complete implementation process of communication link switching. Before introducing the implementation process of the embodiment, the signal switching unit T9 is taken as an example to include a 5G switching button and a satellite switching button. After the 220V AC power supply enters the power input end of the battery module T1, the stable DC 12V power supply output from the a and b ends of the battery module T1 enters the host control circuit, the comparison transmission circuit and the receiving control circuit. After the technical personnel turn on the power switch S1 of the signal switching device, the signal receiving unit T8 and the signal switching unit T9 are powered on and work. After the host controller T2 is powered on by the battery module T1, the technical personnel press any signal switching button (for example, the 5G switching button) in the signal switching unit T9 according to the needs during the initial use, and the signal switching unit T9 transmits the 5G communication signal corresponding to the 5G switching button. After the wireless receiver T5 receives the 5G communication signal, the high level output from the m pin of the wireless receiver T5 enters the positive power input end of the relay J2. Then, the relay J2 is powered on and attracts the control power input end and the normally open contact end to close. In this way, the 5G communication module T6 is powered on and works, and the data port of the 5G communication module T6 is connected to the data port of the host controller T2, respectively, and the host controller T2 transmits and receives data through the 5G communication module T6. In actual situations, the host controller T2 transmits and receives signals according to the signal strength, and the indication light-emitting tube VL emits light with different brightness (that is, when the signal is strong, the input working voltage of the indication light-emitting tube VL is relatively high, and vice versa). When the host controller T2 transmits and receives signals relatively strongly, the voltage signal at the positive electrode of the indication light-emitting tube VL is relatively high, the voltage signal is divided by the resistors R1 and R2 (for example, 2.1V), which is higher than the voltage (for example, 2V) obtained by dividing the 12V power supply by the resistors R3 and R4 and entering the 3 pin of the operational amplifier T3, so that the f pin of the operational amplifier T3 outputs low level, and the signal transmitter T4 does not transmit the link switching signal. When the host controller T2 transmits and receives signals relatively weakly, the voltage signal at the positive electrode of the indication light-emitting tube VL is relatively low, the voltage signal is divided by the resistors R1 and R2 (for example, 1.9V), which is lower than the voltage (for example, 2V) obtained by dividing the 12V power supply by the resistors R3 and R4 and entering the 3 pin of the operational amplifier T3, so that the f pin of the operational amplifier T3 outputs high level, the high level is reduced by the resistor R5 and enters the base electrode of the transistor Q1, the transistor Q1 is turned on, and the low level output from the collector electrode enters the negative power input end of the signal transmitter T4. Since the two signal transmission contacts in the signal transmission button D1 of the signal transmitter T4 are connected together in advance, the signal transmitter T4 transmits the link switching signal.In a certain range (for example, 4000 meters), when the signal receiving unit T8 in the signal switching device carried by the technician receives the link switching signal, the high level enters the positive power input end of the buzzer B, so that the buzzer B is powered on to sound and prompt the technician. The technician will be aware that the current 5G communication module T6 receives or transmits weak wireless data signals, and link switching is needed to switch to the port corresponding to the satellite communication module T7 and connected to the data port of the main controller T2 to ensure the integrity of data transmission and reception. Then, the technician presses the satellite switching button in the signal switching unit T9 with a finger as needed within a certain range, and the signal switching unit T9 transmits the satellite communication signal corresponding to the satellite switching button; after the wireless receiver T5 receives the satellite signal, the high level output of the corresponding I foot enters the positive power input end of the relay J1, and then the relay J1 is powered on to attract the control power input end and the normally open contact end to close. In this way, the satellite communication module T7 will be powered on to work, and the data port of the satellite communication module T7 will be connected to the data port of the main controller T2, and the main controller T2 will transmit and receive data through the satellite communication module T7.

[0062] The wireless communication link switching system provided by the embodiment of the present application, the wireless communication link switching system, the system includes signal transmission equipment and signal switching equipment. The main control circuit can detect the signal strength of the target communication module of the access link in real time, and when it is monitored that the current signal strength is not greater than the preset signal strength, the communication link can be remotely switched through the signal switching equipment, improving the switching convenience of the link channel. The method of monitoring by the technician near the signal transmission equipment in the related art is improved, which saves manpower, ensures the integrity of communication data, and improves the beneficial effects of improving navigation safety.

[0063] Please refer to FIG. 5, which is a circuit structure schematic diagram of a wireless communication link switching device provided by an embodiment of the present application. The wireless communication link switching device provided by the embodiment of the present application includes the wireless communication link switching system provided by any of the above embodiments.

[0064] Among them, the signal switching equipment in the wireless communication link switching system can be integrated in the element box for the technician to carry, improving the working convenience of the technician.

[0065] Since the wireless communication link switching device provided by the embodiment of the present application adopts all the technical solutions of the wireless communication link switching system in all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

Claims

1. A wireless communication link switching system, comprising a signal transmission device and a signal switching device; the signal transmission device and the signal switching device are connected wirelessly; the signal transmission device comprises a battery module, a main control circuit, a signal comparison circuit, a signal receiving circuit and at least two communication modules; the battery module is connected with the main control circuit, the signal comparison circuit, the signal receiving circuit and the at least two communication modules respectively; the main control circuit is connected with the signal comparison circuit, the signal receiving circuit and the at least two communication modules respectively; the signal comparison circuit and the signal receiving circuit are connected; the signal receiving circuit and the at least two communication modules are connected; the signal receiving circuit is configured to control a corresponding target communication module to access a link according to a received target communication signal; the main control circuit is configured to obtain a current signal strength generated by a target communication module; the signal comparison circuit is configured to generate a link switching signal when the current signal strength is not greater than a preset signal strength; and the signal switching device is configured to switch a communication link corresponding to the target communication module when the link switching signal is received. wherein The main control circuit comprises a host and a light-emitting tube; the signal comparison circuit comprises a signal comparison unit and a signal transmitting unit; and the signal receiving circuit comprises a wireless receiving unit and at least two relays. The host and the light-emitting tube are connected in parallel, the light-emitting tube and the comparison unit are connected, and the comparison unit and the signal transmitting unit are connected in series; the wireless receiving unit comprises at least two output ends, one output end of the wireless receiving unit is connected with one of the relays, and one of the relays is connected with one of the communication modules in series. The signal comparison unit comprises an operational amplifier, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor and a triode; and the battery module comprises a positive power output end and a negative power output end. One end of the first resistor is connected with the light-emitting tube, and the other end of the first resistor is connected with the second resistor and the reverse input end of the operational amplifier respectively; The positive power output end is connected with one end of the third resistor, and the other end of the third resistor is connected with one end of the fourth resistor and the same-phase input end of the operational amplifier respectively; 2. The wireless communication link switching system of claim 1, wherein, The other end of the fourth resistor is connected with the negative power output end, the negative power input end of the operational amplifier and the emitter stage of the triode respectively; One end of the fifth resistor is connected with the output end of the operational amplifier, and the other end of the fifth resistor is connected with the base of the triode; 3. The wireless communication link switching system of claim 2, wherein, The positive power input end of the signal transmitting unit is connected with the positive power input end of the operational amplifier, the host, the positive power output end and one end of the third resistor respectively; and the negative power input end of the signal transmitting unit is connected with the collector of the triode. The signal transmitting unit comprises a signal transmitting button; Two signal transmitting contacts in the signal transmitting button are connected. ​ ​ ​ 4. The wireless communication link switching system of claim 2, wherein, ​ ​ 5. The wireless communication link switching system of claim 2, wherein, At least two of the relays include a first relay and a second relay; the wireless receiving unit includes a first output end and a second output end, wherein: The positive power input ends of the wireless receiving unit are connected with the power input ends of the signal transmitting unit, the first relay and the second relay respectively; the negative power input ends of the first relay and the relay are connected with the negative power input ends of the wireless receiving unit respectively; The first output end of the wireless receiving unit and the positive power input end of the first relay, and the second output end of the wireless receiving unit and the positive power input end of the second relay are connected.

6. The wireless communication link switching system of claim 5, wherein, At least two of the communication modules include a 5G communication module and a satellite communication module; The 5G communication module and the satellite communication module are connected with the host respectively; The 5G communication module is connected with the first relay, and the satellite communication module is connected with the second relay. Or, the 5G communication module is connected with the second relay, and the satellite communication module is connected with the first relay.

7. The wireless communication link switching system of claim 1, wherein, The signal switching device includes a signal switching unit and a signal receiving unit, and the signal switching unit and the signal receiving unit are connected in parallel.

8. The wireless communication link switching system of claim 7, wherein, The signal switching device further includes a buzzer and a power switch; The power switch is connected with the signal switching unit and the signal receiving unit in parallel respectively; The buzzer and the signal receiving unit are connected in series.

9. The wireless communication link switching system of claim 7, wherein, The signal switching unit includes at least two signal switching buttons, and one signal switching button controls the corresponding communication signal of one communication module.

10. A wireless communication link switching device, comprising an integrated wireless communication link switching system according to any one of claims 1-9.

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