Isolated controllable communication system

Abstract

The utility model discloses an isolation controllable communication system, which comprises a signal input end, an isolation amplification module, a control module and a signal output end, and is characterized in that the isolation amplification module comprises an isolation amplification circuit, a signal attenuation circuit and a signal amplification circuit, and the input end of the signal attenuation circuit is connected with the signal input end; the output end of the signal attenuation circuit is connected with the input end of the isolation amplification circuit, the output end of the isolation amplification circuit is connected with the input end of the signal amplification circuit, and the output end of the signal amplification circuit is connected to the signal output end; the control module comprises a controller and a first control switch, the first control switch is arranged at the power supply end of the isolation amplification circuit, the controller is connected with the first control switch, and the first control switch is switched on or switched off under the control of the controller. The input voltage range and the output voltage range of the isolation amplification circuit can be expanded, wide voltage input range isolation communication is achieved, the universality, convenience and usability of the isolation amplification circuit are improved, and the requirements of multiple fields and diversification can be met.

Description

Technical Field

[0001] This application relates to the field of isolated communication technology, specifically to an isolated and controllable communication system. Background Technology

[0002] Isolated controllable signals are widely used in many fields due to their ability to ensure system stability, security, and reliability. Especially in power transmission and distribution systems, isolated controllable signals are used to monitor and control parameters such as current and voltage, thereby ensuring the safe operation and stability of the power grid. In communication systems, such as base stations and satellite communication systems, isolated controllable signals are used to ensure stable signal transmission and high communication reliability.

[0003] However, due to the significant differences in signal parameter requirements across various fields, existing isolated and controllable communication systems often only meet certain parameters, such as a narrow input voltage range, to satisfy the diverse signal parameter requirements of multiple fields.

[0004] Therefore, how to improve the versatility of isolated controllable signal communication systems has become an urgent technical problem to be solved. Utility Model Content

[0005] In view of this, this application provides an isolated and controllable communication system to solve the technical problem of how to improve the versatility of isolated and controllable signal communication systems in related technologies.

[0006] This application provides an isolated and controllable communication system, comprising: a signal input terminal, an isolation amplification module, a control module, and a signal output terminal. The isolation amplification module includes an isolation amplification circuit, a signal attenuation circuit, and a signal amplification circuit. The input terminal of the signal attenuation circuit is connected to the signal input terminal, the output terminal of the signal attenuation circuit is connected to the input terminal of the isolation amplification circuit, the output terminal of the isolation amplification circuit is connected to the input terminal of the signal amplification circuit, and the output terminal of the signal amplification circuit is connected to the signal output terminal. The control module includes a controller and a first control switch. The first control switch is disposed at the power supply terminal of the isolation amplification circuit, and the controller is connected to the first control switch. Under the control of the controller, the first control switch is turned on or off.

[0007] In one embodiment, the signal attenuation circuit includes: a first operational amplifier disposed between the signal input terminal and the input terminal of the isolation amplifier circuit, a first input resistor connected in series at the input terminal of the first operational amplifier, and the output terminal of the first operational amplifier connected to the input terminal of the first operational amplifier through a first feedback resistor, wherein the resistance value of the first input resistor is N times the resistance value of the first feedback resistor, where N is greater than 1; the signal amplification circuit includes: a second operational amplifier disposed between the output terminal of the isolation amplifier circuit and the signal output terminal, a second input resistor connected in series at the input terminal of the second operational amplifier, and the output terminal of the second operational amplifier connected to the input terminal of the second operational amplifier through a second feedback resistor, wherein the resistance value of the second feedback resistor is M times the resistance value of the second input resistor, where M is greater than 1.

[0008] In one embodiment, the signal attenuation circuit further includes a first voltage follower, the input terminal of which is connected to the signal input terminal, and the output terminal of which is connected to the input terminal of the first operational amplifier through the first input terminal resistor; the signal amplification circuit further includes a second voltage follower, the input terminal of which is connected to the output terminal of the second operational amplifier, and the output terminal of which is connected to the signal output terminal.

[0009] In one embodiment, the isolated controllable communication system further includes: a trigger module connected to the trigger signal receiving pin of the controller, wherein the controller receives the trigger signal output by the trigger module and outputs a control signal to control the first control switch.

[0010] In one embodiment, the trigger signal receiving pin includes a serial interface pin, the trigger module includes a wireless trigger module, the signal input terminal of the wireless trigger module receives a wireless control signal through a signal receiver, and the output terminal of the wireless trigger module is connected to the serial interface pin of the controller.

[0011] In one embodiment, the trigger signal receiving pin includes a first level trigger pin, and the trigger module further includes an optical signal trigger module, which includes an optical signal receiver, the output of which is connected to the first level trigger pin of the controller.

[0012] In one embodiment, the trigger signal receiving pin includes a second level trigger pin, and the trigger module further includes an electrical signal trigger module. The electrical signal trigger module includes an electrical signal receiving terminal and a second control switch. The second control switch is connected in series between the second level trigger pin and ground, and the electrical signal receiving terminal is connected to the control terminal of the second control switch.

[0013] In one embodiment, the isolated and controllable communication system further includes a power module, which includes a power supply and a voltage conversion circuit. The input terminal of the voltage conversion circuit is connected to the power supply, and the voltage conversion circuit outputs at least one power supply voltage.

[0014] In one embodiment, the power supply includes a UPS power supply.

[0015] In one embodiment, the power module further includes a voltage acquisition module, which is connected to the battery module in the UPS power supply and the controller, respectively, for acquiring the voltage value of the battery module and transmitting the voltage value to the controller.

[0016] This application has at least the following beneficial effects:

[0017] The isolated and controllable communication system in this application uses an isolation amplifier circuit as its core. A signal attenuation circuit is added to the input end of the isolation amplifier circuit. When a high-voltage input signal is input, the voltage of the input signal is attenuated to the voltage input range applicable to the isolation amplifier circuit. A signal amplification circuit is set at the output end of the isolation amplifier circuit to amplify the output signal, thereby expanding the input and output voltage range of the isolation amplifier circuit and realizing wide voltage input range isolated communication. Furthermore, a first control switch is connected in series at the power supply end of the isolation amplifier circuit. This first control switch is controlled to open and close by a controller, thereby disconnecting or connecting the power supply end of the isolation amplifier circuit. This enables the wide voltage input range isolated and controllable output function, improves the versatility and ease of use of the isolation amplifier circuit, and can meet the diverse needs of multiple fields. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a modular schematic diagram of an isolated and controllable communication system provided according to an embodiment of this application;

[0020] Figure 2 This is a schematic diagram of the signal attenuation circuit provided in the embodiments of this application;

[0021] Figure 3 This is a schematic diagram of the signal amplification circuit provided according to an embodiment of this application;

[0022] Figure 4 This is a modular schematic diagram of another isolated and controllable communication system provided according to an embodiment of this application;

[0023] Figure 5 This is a schematic diagram of the circuit principle of the wireless triggering module provided according to an embodiment of this application;

[0024] Figure 6 This is a schematic diagram of the circuit principle of the optical signal triggering module provided according to an embodiment of this application;

[0025] Figure 7 This is a schematic diagram of the circuit principle of the electrical signal triggering module provided in the embodiments of this application;

[0026] Figure 8 This is a modular schematic diagram of an isolated and controllable communication system with a power supply module provided according to an embodiment of this application;

[0027] Figure 9 This is a schematic diagram of the circuit principle of a voltage conversion module according to an embodiment of this application;

[0028] Figure 10 This is a schematic diagram of the circuit principle of another voltage conversion module provided according to an embodiment of this application. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] According to an embodiment of this application, an isolated and controllable communication system is provided, such as... Figure 1 As shown, the communication system includes a signal input terminal 10, an isolation amplification module 20, a control module 30, and a signal output terminal 40. The isolation amplification module 20 includes an isolation amplification circuit 21, a signal attenuation circuit 22, and a signal amplification circuit 23. The input terminal of the signal attenuation circuit 22 is connected to the signal input terminal 10, the output terminal of the signal attenuation circuit 22 is connected to the input terminal of the isolation amplification circuit 21, the output terminal of the isolation amplification circuit 21 is connected to the input terminal of the signal amplification circuit 23, and the output terminal of the signal amplification circuit 23 is connected to the signal output terminal 40 of the communication system.

[0031] The control module 30 includes a controller 31 and a first control switch 32. The first control switch 32 is connected in series with the power supply terminal of the isolation amplifier circuit 21. The controller 31 is connected to the control terminal of the first control switch 32. Under the control of the controller 31, the first control switch 32 disconnects or connects the power supply of the isolation amplifier circuit 21.

[0032] In this application, the isolated and controllable communication system is based on an isolation amplifier circuit 21. A signal attenuation circuit 22 is added to the input terminal of the isolation amplifier circuit 21. When a high-voltage input signal is input to the signal input terminal 10, the voltage of the input signal is attenuated to the voltage input range applicable to the isolation amplifier circuit 21. A signal amplification circuit 23 is set at the output terminal of the isolation amplifier circuit 21 to amplify the output signal of the isolation amplifier circuit 21, thereby expanding the input and output voltage range of the isolation amplifier circuit 21 and realizing wide voltage input range isolated communication. Furthermore, a first control switch 32 is connected in series at the power supply terminal of the isolation amplifier circuit 21. The first control switch 32 is controlled to open and close by a controller 31, thereby disconnecting or connecting the power supply terminal of the isolation amplifier circuit 21. This enables the wide voltage input range isolated and controllable output function, improves the versatility and ease of use of the isolation amplifier circuit 21, and can meet the diverse needs of multiple fields.

[0033] In one embodiment, such as Figure 2 As shown, the signal attenuation circuit 22 includes: a first operational amplifier 221, disposed between the signal input terminal 10 and the input terminal of the isolation amplifier circuit 21, a first input terminal resistor R1 connected in series at the input terminal of the first operational amplifier 221, and the output terminal of the first operational amplifier 221 connected to the input terminal of the first operational amplifier 221 through a first feedback resistor R2, wherein the resistance value of the first input terminal resistor R1 is N times the resistance value of the first feedback resistor R2, where N is greater than 1.

[0034] In this embodiment, based on the amplification formula of the operational amplifier, N is the attenuation factor of the first operational amplifier 221. The specific value of N can be set according to actual needs. For example, if the voltage range of the input signal of the isolation amplifier circuit 21 is -0.5V to +0.5V, while the actual required input signal voltage range is -10V to +10V, then N can be set to 20. For example, the resistance value of the first input terminal resistor R1 can be set to 2kΩ, and the resistance value of the first feedback resistor R2 can be set to 100Ω. The above values ​​are only illustrative examples and do not represent all embodiments; specific values ​​can be adapted according to actual conditions.

[0035] like Figure 3As shown, the signal amplification circuit 23 includes: a second operational amplifier 231, disposed between the output terminal of the isolation amplifier circuit 21 and the signal output terminal 40; a second input terminal resistor R3 is connected in series at the input terminal of the second operational amplifier 231; the output terminal of the second operational amplifier 231 is connected to the input terminal of the second operational amplifier 231 through a second feedback resistor R4; the resistance value of the second feedback resistor R4 is M times the resistance value of the second input terminal resistor R3, where M is greater than 1.

[0036] In this embodiment, based on the formula for calculating the amplification factor of an operational amplifier, M is the amplification factor of the second operational amplifier 231. The specific value of M can be set according to actual needs. For example, it can be equal to N, meaning that the signal attenuation circuit 22 and the signal amplification circuit 23 only extend the voltage input range of the signal without actually amplifying or attenuating it. Of course, M and N can also be different, and the value of M can be set according to actual needs. In the exemplary embodiment, the resistance value of the second input terminal resistor R3 is set to 100Ω, and the resistance value of the second feedback resistor R4 is set to 2kΩ. The above values ​​are only illustrative and do not represent all embodiments; specific values ​​can be adapted according to actual conditions.

[0037] like Figure 2 and Figure 3 As shown, the signal attenuation circuit 22 further includes a first voltage follower 222, and the signal amplification circuit 23 further includes a second voltage follower 232. The input terminal of the first voltage follower 222 is connected to the signal input terminal 10, and the output terminal of the first voltage follower 222 is connected to the input terminal of the first operational amplifier 221 through the first input terminal resistor. The input terminal of the second voltage follower 232 is connected to the output terminal of the second operational amplifier 231, and the output terminal of the second voltage follower 232 is connected to the signal output terminal 40.

[0038] In this embodiment, a first voltage follower 222 is placed between the input terminal of the first operational amplifier 221 and the signal input terminal 10, and a second voltage follower 232 is placed between the output terminal of the second operational amplifier 231 and the signal output terminal 40. This can, to a certain extent, avoid signal loss caused by the high output impedance and the low input impedance of the next stage, thus playing a bridging role. Furthermore, by utilizing the characteristics of high input impedance and low output impedance of the voltage follower, it presents a high impedance state to the previous stage circuit and a low impedance state to the next stage circuit, thereby isolating the preceding and following stage circuits and eliminating their mutual influence.

[0039] In one embodiment, in order to enable automatic or manual control of communication, such as Figure 4As shown, the isolated and controllable communication system also includes a trigger module 50, which is connected to the trigger signal receiving pin of the controller 31. When the controller 31 receives the trigger signal output by the trigger module 50, it can output a control signal to control the first control switch 32.

[0040] The trigger module 50 can adopt various triggering methods, and different triggering methods correspond to different trigger modules 50. In one embodiment, such as... Figure 5 As shown, the trigger module 50 can be a wireless trigger module. The signal input terminal 10 of the wireless trigger module receives wireless control signals through the wireless signal receiver 51, and the output terminal of the wireless trigger module is connected to the trigger signal receiving pin of the controller 31 through a serial interface. For example, the wireless trigger module can be a wireless transceiver module built based on the wireless signal transceiver 51, which can be connected to the controller 31 through an SPI interface to transmit wireless trigger signals. Simultaneously, a remote control module can be used to receive remotely controlled wireless trigger signals, such as power-on signals and / or power-off signals, so that the device enters the power-on or power-off state after a remotely input switch trigger signal.

[0041] In another embodiment, such as Figure 6 As shown, the trigger module 50 can also be an optical signal trigger module, which includes an optical signal receiver 52. The output terminal of the optical signal receiver 52 is connected to the first level trigger pin TIRG1 of the controller 31.

[0042] In another embodiment, such as Figure 7 As shown, the trigger module 50 can also be an electrical signal trigger module. The electrical signal trigger module includes an electrical signal receiver 53 and a second control switch 54. The second control switch 54 is connected in series between the second level trigger pin TIRG2 of the controller 31 and ground. The electrical signal receiver 53 is connected to the control terminal of the second control switch 54. In this embodiment, the electrical signal receiver 53 can use a BNC interface to receive electrical signals.

[0043] In one embodiment, such as Figure 8As shown, the communication system also includes a power module 60, which includes a power supply and a voltage conversion circuit. The input terminal of the voltage conversion circuit is connected to the power supply, and the voltage conversion circuit outputs at least one power supply voltage. In one embodiment, the power supply can be a UPS (Uninterruptible Power Supply). The UPS can include a battery module and a charging management / power supply switching module. The UPS is connected to an external power source via a power interface to supply power to the system and charge the battery. The battery can be a 3.7V, 10000mAh polymer lithium battery. The charging management / power supply switching module can be implemented based on a BQ24610 synchronous step-down battery charger. When the UPS is connected to an external power source, it will be switched to its output voltage to directly supply power to the system and charge the battery simultaneously. When the external power source is disconnected, the battery will be switched on. Battery charging status information is transmitted to the controller 31. By equipping the isolated and controllable communication system with a UPS, it can support long-term standby and long-term continuous operation, ensuring operational stability.

[0044] The voltage conversion circuit can output two supply voltages; for example, it can be achieved through... Figure 9 The isolation power converter chip shown converts the voltage to ±12V to power the isolation amplifier circuit 21 and isolates it from other circuits in the system, through, as... Figure 10 The DC-DC power chip shown converts the voltage to 3.3V to power other circuits in the system.

[0045] In one embodiment, the power module 60 further includes a voltage acquisition module, which is connected to the battery module in the UPS power supply and the controller 31 respectively, for acquiring the voltage value of the battery module and transmitting the voltage value to the controller 31 to obtain battery power information.

[0046] In one embodiment, the communication system may further include a display module, such as an OLED display screen, which is connected to the controller 31 via an IIC interface. The controller 31 controls the display module to display battery charging status, power information, etc.

[0047] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0048] The above are merely preferred embodiments of this application. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. An isolated and controllable communication system, characterized in that, include: The signal input terminal, isolation amplifier module, control module, and signal output terminal are included. The isolation amplification module includes an isolation amplification circuit, a signal attenuation circuit, and a signal amplification circuit. The input terminal of the signal attenuation circuit is connected to the signal input terminal, the output terminal of the signal attenuation circuit is connected to the input terminal of the isolation amplification circuit, the output terminal of the isolation amplification circuit is connected to the input terminal of the signal amplification circuit, and the output terminal of the signal amplification circuit is connected to the signal output terminal. The control module includes a controller and a first control switch. The first control switch is located at the power supply terminal of the isolation amplifier circuit. The controller is connected to the first control switch, and the first control switch is turned on or off under the control of the controller.

2. The isolated and controllable communication system as described in claim 1, characterized in that, The signal attenuation circuit includes: a first operational amplifier disposed between the signal input terminal and the input terminal of the isolation amplifier circuit; a first input terminal resistor connected in series at the input terminal of the first operational amplifier; and the output terminal of the first operational amplifier connected to the input terminal of the first operational amplifier through a first feedback resistor. The resistance value of the first input terminal resistor is N times the resistance value of the first feedback resistor, where N is greater than 1. The signal amplification circuit includes: a second operational amplifier disposed between the output terminal of the isolation amplification circuit and the signal output terminal; a second input resistor is connected in series at the input terminal of the second operational amplifier; the output terminal of the second operational amplifier is connected to the input terminal of the second operational amplifier through a second feedback resistor; the resistance value of the second feedback resistor is M times the resistance value of the second input resistor, where M is greater than 1.

3. The isolated and controllable communication system as described in claim 2, characterized in that, The signal attenuation circuit further includes a first voltage follower, the input terminal of which is connected to the signal input terminal, and the output terminal of which is connected to the input terminal of the first operational amplifier through the first input terminal resistor. The signal amplification circuit further includes a second voltage follower, the input of which is connected to the output of the second operational amplifier, and the output of which is connected to the signal output.

4. The isolated and controllable communication system as described in claim 1, characterized in that, Also includes: The trigger module is connected to the trigger signal receiving pin of the controller. The controller receives the trigger signal output by the trigger module and outputs a control signal to control the first control switch.

5. The isolated and controllable communication system as described in claim 4, characterized in that, The trigger signal receiving pin includes a serial interface pin, and the trigger module includes a wireless trigger module. The signal input terminal of the wireless trigger module receives wireless control signals through a signal receiver, and the output terminal of the wireless trigger module is connected to the serial interface pin of the controller.

6. The isolated and controllable communication system as described in claim 4, characterized in that, The trigger signal receiving pin includes a first-level trigger pin, and the trigger module further includes an optical signal trigger module, which includes an optical signal receiver. The output terminal of the optical signal receiver is connected to the first-level trigger pin of the controller.

7. The isolated and controllable communication system as described in claim 4, characterized in that, The trigger signal receiving pin includes a second level trigger pin, and the trigger module further includes an electrical signal trigger module. The electrical signal trigger module includes an electrical signal receiving terminal and a second control switch. The second control switch is connected in series between the second level trigger pin of the controller and ground, and the electrical signal receiving terminal is connected to the control terminal of the second control switch.

8. The isolated and controllable communication system as described in claim 1, characterized in that, include: A power supply module includes a power supply and a voltage conversion circuit. The input terminal of the voltage conversion circuit is connected to the power supply, and the voltage conversion circuit outputs at least one power supply voltage.

9. The isolated and controllable communication system as described in claim 8, characterized in that, The power supply includes a UPS power supply.

10. The isolated and controllable communication system as described in claim 9, characterized in that, The power module also includes a voltage acquisition module, which is connected to the battery module in the UPS power supply and the controller, respectively, for acquiring the voltage value of the battery module and transmitting the voltage value to the controller.

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