Isolated Roland C receiving device

Abstract

The utility model relates to an isolated Roland C receiving device, and belongs to the technical field of Roland C. According to the isolation type Roland C receiving device, the input power supply, the output power supply, the input signal and the output signal are physically isolated, so that the noise of the external power supply and the external signal entering the Roland C receiving device is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of Loran C, and particularly relates to an isolated Loran C receiving device. Background Art

[0002] The Loran C receiving module generally includes key analog circuits such as a multi-stage amplifier circuit unit, an active or passive filter, a signal buffer circuit unit, a digital-to-analog conversion unit, a clock unit, etc. These circuits require a stable and low-ripple power supply. In the existing power supply technology, an external power supply is usually directly used, the module ground is directly connected to the external ground, and the power supply is not hierarchically processed. This technology has many drawbacks, mainly including: first, the external power supply is not effectively isolated, and external noise directly affects the module power supply; second, the module is directly connected to the external ground, and the fluctuations of the external ground easily affect the module ground; third, although the power supply and the ground are isolated and improved in design, there is no physical isolation, and it is still unable to cope with external factor influences; fourth, the power supply is not hierarchically processed, and the power supplies of each unit affect each other, especially for analog circuits and digital circuits. These will affect the signal reception quality of the Loran C receiving module, and further affect the accuracy of navigation and time service, especially when the signal conditions are poor, such as poor signal-to-noise ratio and severe surrounding electromagnetic interference. Content of the Utility Model

[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. For this purpose, the utility model provides an isolated Loran C receiving device.

[0004] The purpose of the utility model can be realized by the following technical solutions:

[0005] An isolated Loran C receiving device includes a power supply module, a signal processing module, a power supply isolation module, and a signal isolation module;

[0006] The power supply module is respectively connected to a power supply, the signal processing module, the signal isolation module, and an external electrical appliance. The power supply module is used to supply power to the signal processing module, the signal isolation module, and the external electrical appliance;

[0007] The signal processing module is used to receive and process external signals and output the processed signals;

[0008] The power supply isolation module is connected to the power supply module. The power supply isolation module is used to isolate the noise in the input power supply and the output power supply of the power supply module and isolate the fluctuations of the external ground;

[0009] The signal isolation module is connected to the signal processing module. The signal isolation module is used to isolate the noise in the input signal and the output signal of the signal processing module and isolate the fluctuations of the external ground.

[0010] According to some embodiments of the present utility model, the power isolation module includes a first power isolator, a second power isolator, and a power adjustment component;

[0011] The input end of the first power isolator is connected to a power supply, the output end of the first power isolator is connected to the input end of the power adjustment component, and the first power isolator is used to isolate the noise in the power supply and output the isolated voltage to the power adjustment component;

[0012] The output end of the power adjustment component is respectively connected to the power input end of the signal processing module and the input end of the second isolator, and the power adjustment component is used to adjust the voltage output by the first power isolator to the voltages required by the signal processing module and external electrical appliances;

[0013] The output end of the second power isolator is connected to an external electrical appliance, and the second power isolator is used to isolate the voltage output by the power adjustment component;

[0014] The module ground of the first power isolator and the module ground of the power adjustment component are respectively connected to the second power isolator and connected to the external ground through the second power isolator.

[0015] According to some embodiments of the present utility model, the power adjustment component includes a first power step-down transformer, a second power step-down transformer, and a low-ripple power step-down transformer; the signal processing module includes an analog circuit, a first digital circuit, and a second digital circuit;

[0016] The input end of the first power step-down transformer is connected to the output end of the first power isolator, and the output end of the first power step-down transformer is respectively connected to the input end of the second power step-down transformer, the input end of the low-ripple power step-down transformer, and the first digital circuit;

[0017] The output end of the low-ripple power step-down transformer is connected to the analog circuit;

[0018] The output end of the second power step-down transformer is respectively connected to the input end of the second power isolator and the second digital circuit;

[0019] The module ground of the first power step-down transformer, the module ground of the second power step-down transformer, and the module ground of the low-ripple power step-down transformer are all connected to the second power isolator and connected to the external ground through the second power isolator.

[0020] According to some embodiments of the present utility model, the power adjustment component includes a first power step-down transformer, a third power step-down transformer, and a low-ripple power step-down transformer; the signal processing module includes an analog circuit and a first digital circuit;

[0021] The input end of the first power supply step-down transformer is connected to the output end of the first power supply isolator, and the output end of the first power supply step-down transformer is connected to the first digital circuit;

[0022] The input end of the third power supply step-down transformer is connected to the output end of the first power supply isolator, and the output end of the third power supply step-down transformer is connected to the analog circuit.

[0023] According to some embodiments of the present invention, the signal isolation module includes a signal input isolation module, a signal output isolation module, and a signal processing module;

[0024] The input end of the signal input isolation module is connected to an external device and receives signals through the input end. The output end of the signal input isolation module is connected to the input end of the signal processing module and transmits the completely isolated signals to the signal processing module;

[0025] The output end of the signal processing module is connected to the input end of the signal output isolation module;

[0026] The output end of the signal output isolation module is connected to an external device. The signal output isolation module is used to isolate the signals output by the signal processing module and transmit them to the external device.

[0027] According to some embodiments of the present invention, the signal input isolation module includes an analog signal isolator and a first digital signal isolator. The analog signal isolator is used to isolate the analog signals input to the signal processing module, and the first digital signal isolator is used to isolate the digital signals input to the signal processing module. The module ground of the analog signal isolator and the module ground of the first digital signal isolator are both connected to the signal output isolation module and connected to the external ground through the signal output isolation module.

[0028] According to some embodiments of the present invention, the signal processing module includes an analog signal processing circuit, a first digital signal processing circuit, and a second digital signal processing circuit;

[0029] The input end of the analog signal processing circuit is connected to the output end of the analog signal isolator, and the output end of the analog signal processing circuit is connected to the input end of the first digital signal processing circuit;

[0030] The input end of the second digital signal processing circuit is connected to the output end of the first digital signal isolator, and the output end of the second digital signal processing circuit is connected to the input end of the first digital signal processing circuit;

[0031] The output end of the first digital signal processing circuit is connected to the input end of the signal output isolation module;

[0032] The module ground of the first digital signal processing circuit and the module ground of the second digital signal processing circuit are both connected to the signal output isolation module and are connected to the external ground through the signal output isolation module.

[0033] According to some embodiments of the present invention, the signal input isolation module further includes a first high-frequency signal isolator. The output end of the first high-frequency signal isolator is connected to the input end of the first digital signal processing circuit, and the first high-frequency signal isolator is used to isolate the high-frequency digital signals in the digital signals input to the signal processing module.

[0034] According to some embodiments of the present invention, the signal input isolation module includes a second digital signal isolator and a second high-frequency signal isolator. The input end of the second digital signal isolator and the input end of the second high-frequency signal isolator are both connected to the output end of the signal processing module. The second digital signal isolator is used to isolate the low-frequency digital signals output by the signal processing module, and the second high-frequency signal isolator is used to isolate the high-frequency digital signals output by the signal processing module.

[0035] According to some embodiments of the present invention, it further includes an antenna. The antenna is connected to an external power supply, and the output end of the antenna is connected to the input end of the signal isolation module. The antenna transmits analog signals to the signal processing module through the signal isolation module.

[0036] An isolation type Loran C receiving device according to an embodiment of the present invention has at least the following technical effects: by physically isolating the input power supply, output power supply, input signal, and output signal, the noise entering the interior of the Loran C receiving device is reduced. By isolating the module ground inside the Loran C receiving device from the external ground, the influence on the internal modules of the Loran C receiving device caused by external ground fluctuations is reduced, and the anti-interference ability of the receiving device is improved. Brief Description of the Drawings

[0037] For the convenience of those skilled in the art to understand, the present invention will be further described below with reference to the accompanying drawings.

[0038] Figure 1-2 It is a block diagram of a receiving module provided in an embodiment of the present invention;

[0039] Figure 3-4 It is a power supply isolation block diagram provided in an embodiment of the present invention;

[0040] Figure 5 It is a signal isolation block diagram provided in an embodiment of the present invention. Detailed Embodiments

[0041] To further elaborate on the technical means and effects adopted by the present utility model to achieve the intended utility model purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation manners, structures, features, and effects in accordance with the present utility model as follows.

[0042] Please refer to Figure 1-2 , the isolated Loran C receiving device provided by the present utility model in an embodiment includes a power supply module, a signal processing module, a power isolation module, and a signal isolation module;

[0043] The power supply module is respectively connected to a power source, the signal processing module, the signal isolation module, and an external electrical appliance. The power supply module is used to supply power to the signal processing module, the signal isolation module, and the external electrical appliance;

[0044] The signal processing module is used to receive and process external signals and output the processed signals;

[0045] The power isolation module is connected to the power supply module. The power isolation module is used to isolate the noise in the input power supply and output power supply of the power supply module and isolate the fluctuations of the external ground;

[0046] The signal isolation module is connected to the signal processing module. The signal isolation module is used to isolate the noise in the input signal and output signal of the signal processing module and isolate the fluctuations of the external ground.

[0047] In this embodiment, the circuits inside the Loran C receiving module and the external circuits of the Loran C receiving module are divided into two power supply units inside and outside. The internal and external power supplies are physically isolated through isolators to improve the isolation efficiency. At the same time, the signal first departure needs to refer to the ground, and these grounds are connected to the power ground. By dividing the module ground inside the Loran C receiving module into the internal ground, the physical isolation between the internal ground and the external ground is realized, and the physical isolation of the signal ground is achieved.

[0048] Among them, all isolation modules adopt physical isolators, with an isolation voltage of not less than 1500 VDC and an isolation resistance of not less than 1000 MΩ. By setting the power isolation module to isolate the input power supply and output power supply of the Loran C receiving module, the noise introduced by the external power supply is reduced, and the quality of the received signal is improved; by setting the signal isolation module to isolate the input signal and output signal of the Loran C receiving module, the quality of the received signal of the Loran C receiving module is improved, and thus the accuracy of navigation and time service is improved.

[0049] Please refer to Figure 2-3 , in a further embodiment of the present utility model, the power isolation module includes a first power isolator, a second power isolator, and a power adjustment component;

[0050] The input end of the first power isolator is connected to the power supply, and the output end of the first power isolator is connected to the input end of the power conditioning component. The first power isolator is used to isolate the noise in the power supply and output the isolated voltage to the power conditioning component;

[0051] The output end of the power conditioning component is respectively connected to the power input end of the signal processing module and the input end of the second isolator. The power conditioning component is used to adjust the voltage output by the first power isolator to the voltages required by the signal processing module and external electrical appliances;

[0052] The output end of the second power isolator is connected to the external electrical appliances. The second power isolator is used to isolate the voltage output by the power conditioning component;

[0053] The module ground of the first power isolator and the module ground of the power conditioning component are respectively connected to the second power isolator and connected to the external ground through the second power isolator.

[0054] In a further embodiment of the present invention, the power conditioning component includes a first power step-down transformer, a second power step-down transformer, and a low-ripple power step-down transformer; the signal processing module includes an analog circuit, a first digital circuit, and a second digital circuit;

[0055] The input end of the first power step-down transformer is connected to the output end of the first power isolator. The output end of the first power step-down transformer is respectively connected to the input end of the second power step-down transformer, the input end of the low-ripple power step-down transformer, and the first digital circuit;

[0056] The output end of the low-ripple power step-down transformer is connected to the analog circuit;

[0057] The output end of the second power step-down transformer is respectively connected to the input end of the second power isolator and the second digital circuit;

[0058] The module ground of the first power step-down transformer, the module ground of the second power step-down transformer, and the module ground of the low-ripple power step-down transformer are all connected to the second power isolator and connected to the external ground through the second power isolator.

[0059] In this embodiment, in order to further reduce the power supply noise, the power conditioning component divides the analog signal and the digital signal into a digital power supply and an analog power supply. In the case of physical isolation from the external power supply, the digital signal and the analog signal are further isolated in a non-physical isolation manner to reduce the mutual influence of the internal power supplies.

[0060] Among them, the first power voltage regulator usually adopts a DC / DC converter, which is beneficial to reducing the circuit area and improving the power efficiency; the analog circuit usually has a small current and requires very small voltage ripple, so the low-ripple power voltage regulator usually adopts an LDO converter, and there is no problem of large circuit area and low efficiency; the second power voltage regulator can adopt a DC / DC or LDO converter according to the magnitude of the output current.

[0061] In a further embodiment of the present utility model, the power adjustment component includes a first power voltage regulator, a third power voltage regulator, and a low-ripple power voltage regulator; the signal processing module includes an analog circuit and a first digital circuit;

[0062] The input end of the first power voltage regulator is connected to the output end of the first power isolator, and the output end of the first power voltage regulator is connected to the first digital circuit;

[0063] The input end of the third power voltage regulator is connected to the output end of the first power isolator, and the output end of the third power voltage regulator is connected to the analog circuit.

[0064] In this embodiment, to further improve the stability of the power supply output to the analog signal processing circuit, the output power of the low-ripple power voltage regulator can be optimized by adding a third power voltage regulator to independently supply power to the low-ripple power voltage regulator.

[0065] Please refer to Figure 4 , in a further embodiment of the present utility model, the signal isolation module includes a signal input isolation module, a signal output isolation module, and a signal processing module;

[0066] The input end of the signal input isolation module is connected to an external device and receives a signal through the input end. The output end of the signal input isolation module is connected to the input end of the signal processing module and transmits the completely isolated signal to the signal processing module;

[0067] The output end of the signal processing module is connected to the input end of the signal output isolation module;

[0068] The output end of the signal output isolation module is connected to an external device. The signal output isolation module is used to isolate the signal output by the signal processing module and transmit it to the external device.

[0069] In a further embodiment of the present utility model, the signal input isolation module includes an analog signal isolator and a first digital signal isolator. The analog signal isolator is used to isolate the analog signal input to the signal processing module, and the first digital signal isolator is used to isolate the digital signal input to the signal processing module. The module ground of the analog signal isolator and the module ground of the first digital signal isolator are both connected to the signal output isolation module and connected to the external ground through the signal output isolation module.

[0070] In this embodiment, the external signal output usually has two signal types, analog signals and digital signals, and different signal isolation methods are adopted. The antenna signal is an analog signal, which is converted into an internal analog signal through an analog isolator; the digital signal is input to the first digital signal isolator and converted into an internal digital signal.

[0071] In a further embodiment of the present utility model, the signal processing module includes an analog signal processing circuit, a first digital signal processing circuit, and a second digital signal processing circuit;

[0072] The input end of the analog signal processing circuit is connected to the output end of the analog signal isolator, and the output end of the analog signal processing circuit is connected to the input end of the first digital signal processing circuit;

[0073] The input end of the second digital signal processing circuit is connected to the output end of the first digital signal isolator, and the output end of the second digital signal processing circuit is connected to the input end of the first digital signal processing circuit;

[0074] The output end of the first digital signal processing circuit is connected to the input end of the signal output isolation module;

[0075] The module ground of the first digital signal processing circuit and the module ground of the second digital signal processing circuit are both connected to the signal output isolation module and connected to the external ground through the signal output isolation module.

[0076] In this embodiment, the internal analog signal is processed by the analog signal processing circuit, transmitted to the second digital signal processing circuit (signal processor) for analog acquisition processing, and then output to the external device by the second digital signal processing circuit.

[0077] In a further embodiment of the present utility model, the signal input isolation module further includes a first high-frequency signal isolator, the output end of the first high-frequency signal isolator is connected to the input end of the first digital signal processing circuit, and the first high-frequency signal isolator is used to isolate the high-frequency digital signal in the digital signal of the input signal processing module.

[0078] In this embodiment, the digital signal input is usually a low-frequency digital signal and a high-frequency digital signal. These types of signals can use the same type of isolator, but the requirements for the isolator are very high and the selection is difficult. Adopting different isolation methods can facilitate the selection of a suitable isolator.

[0079] In a further embodiment of the present utility model, the signal input isolation module includes a second digital signal isolator and a second high-frequency signal isolator. The input ends of the second digital signal isolator and the second high-frequency signal isolator are both connected to the output end of the signal processing module. The second digital signal isolator is used to isolate the low-frequency digital signal output by the signal processing module, and the second high-frequency signal isolator is used to isolate the high-frequency digital signal output by the signal processing module.

[0080] In a further embodiment of the present utility model, an antenna is further included. The antenna is connected to an external power supply, and the output end of the antenna is connected to the input end of the signal isolation module. The antenna transmits an analog signal to the signal processing module through the signal isolation module.

[0081] In this embodiment, the antenna is directly connected to the external power supply and the external ground.

[0082] The above are only the preferred embodiments of the present utility model and do not impose any form of limitation on the present utility model. Although the present utility model has been disclosed above with the preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to the equivalent embodiments by using the disclosed technical content without departing from the technical solution of the present utility model. However, any brief modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution content of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. An isolated Loran C receiving device, characterized in that, It includes a power supply module, a signal processing module, a power isolation module, and a signal isolation module; The power supply module is respectively connected to a power source, the signal processing module, the signal isolation module, and an external electrical appliance. The power supply module is used to supply power to the signal processing module, the signal isolation module, and the external electrical appliance; The signal processing module is used to receive and process external signals and output the processed signals; The power isolation module is connected to the power supply module. The power isolation module is used to isolate the noise in the input power supply and output power supply of the power supply module and isolate the fluctuations of the external ground; The signal isolation module is connected to the signal processing module. The signal isolation module is used to isolate the noise in the input signal and output signal of the signal processing module and isolate the fluctuations of the external ground.

2. The isolated Loran C receiving device according to claim 1, characterized in that The power isolation module includes a first power isolator, a second power isolator, and a power regulation component; The input end of the first power isolator is connected to the power source, and the output end of the first power isolator is connected to the input end of the power regulation component. The first power isolator is used to isolate the noise in the power source and output the isolated voltage to the power regulation component; The output end of the power regulation component is respectively connected to the power input end of the signal processing module and the input end of the second power isolator. The power regulation component is used to adjust the voltage output by the first power isolator to the voltages required by the signal processing module and the external electrical appliance; The output end of the second power isolator is connected to the external electrical appliance. The second power isolator is used to isolate the voltage output by the power regulation component; The module ground of the first power isolator and the module ground of the power regulation component are respectively connected to the second power isolator and connected to the external ground through the second power isolator.

3. The isolated Loran C receiving device according to claim 2, wherein The power regulation component includes a first power step-down transformer, a second power step-down transformer, and a low-ripple power step-down transformer; the signal processing module includes an analog circuit, a first digital circuit, and a second digital circuit; The input end of the first power step-down transformer is connected to the output end of the first power isolator. The output end of the first power step-down transformer is respectively connected to the input end of the second power step-down transformer, the input end of the low-ripple power step-down transformer, and the first digital circuit; The output end of the low-ripple power step-down transformer is connected to the analog circuit; The output end of the second power step-down transformer is respectively connected to the input end of the second power isolator and the second digital circuit; The module ground of the first power step-down transformer, the module ground of the second power step-down transformer, and the module ground of the low-ripple power step-down transformer are all connected to the second power isolator and connected to the external ground through the second power isolator.

4. The isolated Loran C receiving device according to claim 2, wherein The power regulation component includes a first power step-down transformer, a third power step-down transformer, and a low-ripple power step-down transformer; the signal processing module includes an analog circuit and a first digital circuit; The input end of the first power step-down transformer is connected to the output end of the first power isolator. The output end of the first power step-down transformer is connected to the first digital circuit; The input end of the third power voltage regulator is connected to the output end of the first power isolator, and the output end of the third power voltage regulator is connected to the analog circuit.

5. An isolated Loran C receiving device according to claim 1, characterized in that, The signal isolation module includes a signal input isolation module, a signal output isolation module, and a signal processing module; The input end of the signal input isolation module is connected to an external device and receives signals through the input end. The output end of the signal input isolation module is connected to the input end of the signal processing module and transmits the completely isolated signals to the signal processing module; The output end of the signal processing module is connected to the input end of the signal output isolation module; The output end of the signal output isolation module is connected to an external device. The signal output isolation module is used to isolate the signals output by the signal processing module and transmit them to the external device.

6. An isolated Loran C receiving device according to claim 5, characterized in that, The signal input isolation module includes an analog signal isolator and a first digital signal isolator. The analog signal isolator is used to isolate the analog signals input to the signal processing module, and the first digital signal isolator is used to isolate the digital signals input to the signal processing module. The module ground of the analog signal isolator and the module ground of the first digital signal isolator are both connected to the signal output isolation module and connected to the external ground through the signal output isolation module.

7. An isolated Loran C receiving device according to claim 6, characterized in that, The signal processing module includes an analog signal processing circuit, a first digital signal processing circuit, and a second digital signal processing circuit; The input end of the analog signal processing circuit is connected to the output end of the analog signal isolator, and the output end of the analog signal processing circuit is connected to the input end of the first digital signal processing circuit; The input end of the second digital signal processing circuit is connected to the output end of the first digital signal isolator, and the output end of the second digital signal processing circuit is connected to the input end of the first digital signal processing circuit; The output end of the first digital signal processing circuit is connected to the input end of the signal output isolation module; The module ground of the first digital signal processing circuit and the module ground of the second digital signal processing circuit are both connected to the signal output isolation module and connected to the external ground through the signal output isolation module.

8. An isolated Loran C receiving device according to claim 7, characterized in that, The signal input isolation module further includes a first high-frequency signal isolator. The output end of the first high-frequency signal isolator is connected to the input end of the first digital signal processing circuit. The first high-frequency signal isolator is used to isolate the high-frequency digital signals in the digital signals input to the signal processing module.

9. An isolation type Loran C receiving device according to any one of claims 5-7, characterized in that, The signal input isolation module includes a second digital signal isolator and a second high-frequency signal isolator. The input end of the second digital signal isolator and the input end of the second high-frequency signal isolator are both connected to the output end of the signal processing module. The second digital signal isolator is used to isolate the low-frequency digital signals output by the signal processing module, and the second high-frequency signal isolator is used to isolate the high-frequency digital signals output by the signal processing module.

10. A separated Loran C receiving device according to claim 1, characterized in that, It further includes an antenna, which is connected to an external power supply. The output end of the antenna is connected to the input end of the signal isolation module, and the antenna transmits an analog signal to the signal processing module through the signal isolation module.

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