Frequency signal switching shunt device based on domestic platform

Abstract

The invention discloses frequency signal switching and shunting equipment based on a domestic platform, and relates to the field of frequency signal shunting. The device comprises a power supply filter, a power supply module, a frequency signal switching shunt module and an indicating lamp board. The frequency signal switching shunt module comprises an input switching module, a signal shunt module, a signal output module and a signal detection module. The blank of the field in China is filled; through the design of the overall structure of the input switching module, different external frequency input signals are not in the same change-over switch, interference between the input signals is avoided, and the isolation degree of the signals is improved; the filter circuit is designed to be of a general topological structure, frequency signals of different frequency points can be filtered by configuring different resistors and capacitors, and the device is simple in structure and easy to implement.

Description

Technical Field

[0001] The present invention relates to the field of frequency signal branching, and in particular to a frequency signal switching branching device based on a domestic platform. Background Art

[0002] The input of the frequency signal switching branching device is a multi-channel frequency signal, and one of the frequency signals can be selected for branch output to meet the user's demand for multi-channel synchronous frequency signals, and has a wide range of applications.

[0003] However, there are a large number of imported components in domestic related products, which do not meet the requirements of independent control, resulting in limited use scenarios. Therefore, developing a frequency signal switching and branching device based on a domestic platform has a broader application space. Summary of the invention

[0004] In view of this, the present invention proposes a frequency signal switching and branching device based on a domestic platform. The device fills the gap in this field in China, and has high signal isolation in the device, and the device structure is simple and easy to implement.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] A frequency signal switching shunt device based on a domestic platform, comprising a power filter, a power module, a frequency signal switching shunt module and an indicator light board;

[0007] The power input port of the power filter receives external 220V AC power, and the power output port of the power filter is connected to the power input port of the power module; the power output port of the power module is connected to the power input port of the frequency signal switching shunt module;

[0008] The frequency signal switching branch module includes N signal input ports, M signal output ports and N+M signal state output ports;

[0009] The N signal input ports of the frequency signal switching branch module receive one external frequency input signal respectively, and the M signal output ports of the frequency signal switching branch module output branch output signals of the same external frequency input signal;

[0010] The indicator light board includes N+M indicator lights, each indicator light has a signal state input port, and the signal state input port of the indicator light board is connected to the signal state output port of the frequency signal switching branch module in a one-to-one correspondence.

[0011] Furthermore, the frequency signal switching branch module includes an input switching module, a signal branch module, a signal output module and a signal detection module;

[0012] The input switching module includes a plurality of switching switches, which form a binary tree structure, receive N external frequency input signals, and output one of the external frequency input signals; each switching switch has two signal input ports and one signal output port, and the switching switch directly connected to the external frequency input signal has two signal input ports that receive one external frequency input signal and a GND signal respectively, and the signal output port outputs one of the signals; the two signal input ports of the remaining switching switches receive the outputs of the two switching switches connected thereto;

[0013] The signal branching module includes a first-stage signal branching circuit and M second-stage signal branching circuits; the first-stage signal branching circuit and the second-stage signal branching circuit have the same structure, and both include a driving amplifier chip and a power supply chip;

[0014] The power input port of the power supply chip is the power input port of the frequency signal switching shunt module, which is connected to the power output port of the power module, and the power output port of the power supply chip is connected to the power input port of the driving amplifier chip;

[0015] For each first-stage signal shunt circuit, the signal input port of the driving amplifier chip receives the output of the input switching module; for the cth first-stage signal shunt circuit, the signal output port of the driving amplifier chip is connected to b c The signal input port of the driving amplifier chip in the second-stage signal branch circuit, c = 1, 2, 3, ..., a,

[0016] The signal output module includes M signal output circuits, and the signal output circuits are connected to the second-stage signal shunt circuits in a one-to-one correspondence; each signal output circuit includes a filter circuit and a π decay circuit, the signal input port of the filter circuit is connected to the signal output port of the driving amplifier chip in the second-stage signal shunt circuit, the signal output port of the filter circuit is connected to the signal input port of the π decay circuit, and the signal output port of the π decay circuit is the signal output port of the frequency signal switching shunt module, and outputs the frequency signal shunt output signal;

[0017] The signal detection module includes N+M signal input ports and N+M signal state output ports. The N+M signal input ports of the signal detection module respectively receive N external frequency input signals and M frequency signal branch output signals. The signal state output port of the signal detection module is the signal state output port of the frequency signal switching branch module.

[0018] Due to the adoption of the above technical solution, the beneficial effects of the present invention compared with the prior art are:

[0019] 1. The present invention is the first to propose a frequency signal switching and branching device based on a domestic platform, filling the gap in this field.

[0020] 2. In the present invention, the overall structure of the input switching module is designed so that different external frequency input signals are not in the same switching switch, thereby avoiding interference between input signals and improving signal isolation.

[0021] 3. The filter circuit in the present invention is designed as a universal topology structure. By configuring different resistors and capacitors, frequency signals of different frequencies can be filtered, and it has certain scalability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of a frequency signal switching branching device based on a domestic platform in an embodiment of the present invention.

[0023] Figure 2 for Figure 1 Schematic diagram of the structure of the medium frequency signal switching branch module.

[0024] Figure 3 and Figure 4 for Figure 2 Schematic diagram of two structures of the input switching module.

[0025] Figure 5 for Figure 2 A schematic diagram of the structure of the signal splitting module in this embodiment.

[0026] Figure 6 for Figure 2 A schematic diagram of the structure of the signal output module in this embodiment. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0028] A frequency signal switching and branching device based on a domestic platform, such as Figure 1 As shown, it includes a power filter, a power module, a frequency signal switching shunt module and an indicator light board;

[0029] Specifically, in this embodiment, the power filter, the power module, the frequency signal switching shunt module and the indicator light board are installed inside the chassis housing, and the external interface of the frequency signal switching shunt device is installed on the chassis housing;

[0030] The power input port of the power filter receives external 220V AC power, and the power output port of the power filter is connected to the power input port of the power module; the power output port of the power module is connected to the power input port of the frequency signal switching shunt module;

[0031] Specifically, in this embodiment, the power filter uses FLHE83M-3A from Beijing Zhongshi Zhengqi Company; the power module uses the customized power supply CETC54-LSP54-2G from Chaoyang Power Supply Company;

[0032] The frequency signal switching branch module includes N signal input ports, M signal output ports and N+M signal state output ports;

[0033] The N signal input ports of the frequency signal switching branch module receive one external frequency input signal respectively, and the M signal output ports of the frequency signal switching branch module output branch output signals of the same external frequency input signal;

[0034] Specifically, in this embodiment, N is 2, M is 16;

[0035] The indicator light board includes N+M indicator lights, each indicator light has a signal state input port, and the signal state input port of the indicator light board is connected to the signal state output port of the frequency signal switching branch module in a one-to-one correspondence.

[0036] Specifically, in this embodiment, the indicator light of the indicator light board is KTR-F5G-LC produced by Shenzhen Ketteling Technology Co., Ltd.

[0037] Furthermore, if Figure 2 As shown, the frequency signal switching branch module includes an input switching module, a signal branching module, a signal output module and a signal detection module;

[0038] The input switching module includes a plurality of switching switches, which form a binary tree structure, receive N external frequency input signals, and output one of the external frequency input signals; each switching switch has two signal input ports and one signal output port, and the switching switch directly connected to the external frequency input signal has two signal input ports that receive one external frequency input signal and a GND signal respectively, and the signal output port outputs one of the signals; the two signal input ports of the remaining switching switches receive the outputs of the two switching switches connected thereto;

[0039] Specifically, Figure 3As shown, in this embodiment, there are two frequency input signals A and B. The first stage of the input switching module includes two switching switches for receiving the two frequency input signals A and B, and the second stage includes a switching switch for outputting one of the frequency input signals A and B. The switching switch of the input switching module uses HFD4 / 5 of Suzhou Huichuan Company. When the A input signal is selected, the two switching switches of the first stage output the A input signal and GND respectively, and the switching switch of the second stage outputs the A input signal; when the B input signal is selected, the two switching switches of the first stage output GND and the B input signal respectively, and the switching switch of the second stage outputs the B input signal; in this way, after the switching of the first stage switching switch, only one input signal is left, which avoids the interference of the other input signal and improves the isolation of the input signal;

[0040] In addition, if Figure 4 As shown, it is an input switching module corresponding to the three-way frequency input signals A, B, and C. The first stage of the input switching module includes three switching switches for receiving the three-way frequency input signals A, B, and C. The second stage includes a switching switch for outputting one of the frequency input signals A and B; the third stage includes a switching switch for outputting one of the frequency input signals A, B, and C.

[0041] The above two structures can be compared to the input switching module structure corresponding to the multi-channel frequency input signal, that is, multiple switching switches form a binary tree structure, receive N channels of external frequency input signals, and output one of the external frequency input signals;

[0042] The signal branching module includes a first-stage signal branching circuit and M second-stage signal branching circuits; the first-stage signal branching circuit and the second-stage signal branching circuit have the same structure, and both include a driving amplifier chip and a power supply chip;

[0043] The power input port of the power supply chip is the power input port of the frequency signal switching shunt module, which is connected to the power output port of the power module, and the power output port of the power supply chip is connected to the power input port of the driving amplifier chip;

[0044] For each first-stage signal shunt circuit, the signal input port of the driving amplifier chip receives the output of the input switching module; for the cth first-stage signal shunt circuit, the signal output port of the driving amplifier chip is connected to b c The signal input port of the driving amplifier chip in the second-stage signal branch circuit, c = 1, 2, 3, ..., a,

[0045] Specifically, Figure 5As shown, in this embodiment, four first-stage signal shunt circuits are included, each of which is connected to four second-stage signal shunt circuits, and the two-stage signal shunt circuit can avoid the output signal amplitude being too low; the driving amplifier chip uses the SGM7SZ04YN5G chip of Shengbang Microelectronics, and the power supply chip uses the ME6211C33M5G chip of Weimeng Electronics; each signal shunt circuit is powered by an independent power supply chip, which can reduce the influence of power supply ripple on frequency signal phase noise;

[0046] like Figure 6 As shown, the signal output module includes M signal output circuits, and the signal output circuits are connected to the second-stage signal shunt circuits in a one-to-one correspondence; each signal output circuit includes a filter circuit and a π decay circuit, the signal input port of the filter circuit is connected to the signal output port of the driving amplifier chip in the second-stage signal shunt circuit, the signal output port of the filter circuit is connected to the signal input port of the π decay circuit, and the signal output port of the π decay circuit is the signal output port of the frequency signal switching shunt module, which outputs the frequency signal shunt output signal;

[0047] Specifically, in this embodiment, the filter circuit is designed as a universal topology structure, and frequency signals of different frequency points can be filtered by configuring different resistances and capacitances. At the same time, by configuring different resistance values ​​in the π decay circuit, the attenuation value of the π decay circuit can be adjusted, thereby adjusting the power value of the frequency signal output by the frequency signal switching branch device;

[0048] The signal detection module includes N+M signal input ports and N+M signal state output ports. The N+M signal input ports of the signal detection module respectively receive N external frequency input signals and M frequency signal branch output signals. The signal state output port of the signal detection module is the signal state output port of the frequency signal switching branch module.

[0049] Specifically, in this embodiment, the signal detection module is a single-chip microcomputer, and GigaDevice's product GD32F450VKT6 is selected. N-channel external frequency input signals and M-channel frequency signal branch output signals are connected to the IO port of the single-chip microcomputer. The single-chip microcomputer can detect the state of the signal and indicate the state of one channel of the signal through the indicator light board. The indicator light is on, indicating that the signal is normal, and the light is off, indicating that the signal is abnormal.

[0050] The working principle of this embodiment is as follows:

[0051] The power filter is directly connected to the 220V AC power, and filters and stabilizes the input 220V AC power before outputting it to the power module;

[0052] The power module converts the filtered 220V AC power into low-voltage DC power and outputs it to the frequency signal switching shunt module;

[0053] The frequency signal switching branch module has two frequency signal inputs and can choose to branch out one frequency signal;

[0054] The indicator light panel indicates the status of each input and branch output frequency signal. If the light is on, it means the frequency signal is normal; if the light is off, it means the frequency signal is abnormal.

[0055] The frequency signal switching branch module includes an input switching module, a signal branch module, a signal output module, and a signal detection module; wherein,

[0056] The input switching module selects and switches the two input frequency signals, and outputs one frequency signal to the signal splitting module;

[0057] The signal splitting module divides the selected switched frequency signal into 16 channels and amplifies and outputs them to the signal output module;

[0058] The signal output module filters the signal after branch amplification and outputs the final signal after π attenuation. The filter circuit is designed as a universal topology structure. By configuring different resistors and capacitors, frequency signals of different frequencies can be filtered.

[0059] The signal detection module detects the status of each input and branch output frequency signal, and controls the lighting of the corresponding indicator light on the indicator light panel. If the light is on, it means that the frequency signal is normal, and if the light is off, it means that the frequency signal is abnormal.

[0060] In summary, the present invention proposes a frequency signal switching and branching device based on a domestic platform, which fills the gap in this field in China; through the design of the overall structure of the input switching module, different external frequency input signals are not in the same switching switch, avoiding interference between input signals and improving signal isolation; the filtering circuit is designed as a universal topology structure, and by configuring different resistors and capacitors, frequency signals of different frequency points can be filtered, and the device structure is simple and easy to implement.

[0061] Those skilled in the art will appreciate that the embodiments described are intended to help readers understand the principles of the present invention, and should be understood that the scope of protection of the present invention is not limited to the embodiments described. For those skilled in the art, the present invention may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A frequency signal switching and branching device based on a domestic platform, It is characterized in that It includes a power filter, a power module, a frequency signal switching branch module and an indicator light board; The power input port of the power filter receives external 220V AC power, and the power output port of the power filter is connected to the power input port of the power module; the power output port of the power module is connected to the power input port of the frequency signal switching shunt module; The frequency signal switching branch module includes N signal input ports, M signal output ports and N+M signal state output ports; The N signal input ports of the frequency signal switching branch module receive one external frequency input signal respectively, and the M signal output ports of the frequency signal switching branch module output branch output signals of the same external frequency input signal; The indicator light board includes N+M indicator lights, each indicator light has a signal state input port, and the signal state input port of the indicator light board is connected to the signal state output port of the frequency signal switching branch module in a one-to-one correspondence.

2. According to claim 1, a frequency signal switching and branching device based on a domestic platform, It is characterized in that The frequency signal switching branch module includes an input switching module, a signal branch module, a signal output module and a signal detection module; The input switching module includes a plurality of switching switches, which form a binary tree structure, receive N external frequency input signals, and output one of the external frequency input signals; each switching switch has two signal input ports and one signal output port, and the switching switch directly connected to the external frequency input signal has two signal input ports that receive one external frequency input signal and a GND signal, respectively, and a signal output port that outputs one of the signals; The two signal input ports of the remaining switching switches receive the outputs of the two switching switches connected thereto; The signal branching module includes a first-stage signal branching circuit and M second-stage signal branching circuits; the first-stage signal branching circuit and the second-stage signal branching circuit have the same structure, and both include a driving amplifier chip and a power supply chip; The power input port of the power supply chip is the power input port of the frequency signal switching shunt module, which is connected to the power output port of the power module, and the power output port of the power supply chip is connected to the power input port of the driving amplifier chip; For each first-stage signal shunt circuit, the signal input port of the driving amplifier chip receives the output of the input switching module; for the cth first-stage signal shunt circuit, the signal output port of the driving amplifier chip is connected to b c The signal input port of the driving amplifier chip in the second-stage signal branch circuit, c = 1, 2, 3, ..., a, The signal output module includes M signal output circuits, and the signal output circuits are connected to the second-stage signal shunt circuits in a one-to-one correspondence; each signal output circuit includes a filter circuit and a π decay circuit, the signal input port of the filter circuit is connected to the signal output port of the driving amplifier chip in the second-stage signal shunt circuit, the signal output port of the filter circuit is connected to the signal input port of the π decay circuit, and the signal output port of the π decay circuit is the signal output port of the frequency signal switching shunt module, and outputs the frequency signal shunt output signal; The signal detection module includes N+M signal input ports and N+M signal state output ports. The N+M signal input ports of the signal detection module respectively receive N external frequency input signals and M frequency signal branch output signals. The signal state output port of the signal detection module is the signal state output port of the frequency signal switching branch module.

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