CN114301442A

CN114301442A - Signal enhancement device capable of eliminating electromagnetic interference

Info

Publication number: CN114301442A
Application number: CN202210003132.4A
Authority: CN
Inventors: 劳仲标
Original assignee: Zhongshan Aiscent Technologies Co ltd
Current assignee: Zhongshan Aiscent Technologies Co ltd
Priority date: 2022-01-04
Filing date: 2022-01-04
Publication date: 2022-04-08

Abstract

The invention discloses a signal enhancement device capable of eliminating electromagnetic interference, which comprises a signal input end, a signal output end and a signal output end, wherein the signal input end is connected with an external device and can receive a differential signal sent by the external device; the first signal conversion module is electrically connected with the signal input end and used for converting the differential signal into a TTL signal; the logic gate module is electrically connected with the first signal conversion module and is used for shaping and distributing the TTL signals into a plurality of paths of synchronous TTL signals to be output; the plurality of second signal conversion modules are electrically connected with the logic gate module, and respectively receive a path of synchronous TTL signals and convert the synchronous TTL signals into differential signals; the signal output ends are respectively and electrically connected with a second signal conversion module and external equipment, and can output synchronous differential signals to different external equipment; the output signals can be processed and connected in parallel to form multiple paths, and then power output is improved, so that consistency of the multiple paths of signals separated by the sensor and anti-interference capability of the signals are guaranteed, and the problem of mutual interference among multiple devices is solved.

Description

Signal enhancement device capable of eliminating electromagnetic interference

Technical Field

The invention relates to the field of signal transmission equipment, in particular to a signal enhancement device capable of eliminating electromagnetic interference.

Background

In a high-precision closed-loop control system, position signals are usually connected to a motion controller, a driver and other control systems at the same time, a sensor signal line passes through a plurality of interference sources in a wiring process and is connected to a plurality of devices in parallel, signal consistency is poor, external interference is easy to be caused, and mutual interference exists among the devices, so that a signal enhancement device capable of eliminating electromagnetic interference is urgently needed.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a signal enhancement device capable of eliminating electromagnetic interference.

The technical scheme adopted by the embodiment of the invention for solving the technical problem is as follows: a signal enhancement apparatus that rejects electromagnetic interference, comprising:

the signal input end is connected with an external device and can receive a differential signal sent by the external device;

the first signal conversion module is electrically connected with the signal input end and used for converting the differential signal into a TTL signal;

the logic gate module is electrically connected with the first signal conversion module and is used for shaping and distributing the TTL signals into a plurality of paths of synchronous TTL signals to be output;

the plurality of second signal conversion modules are electrically connected with the logic gate module, and respectively receive a path of synchronous TTL signals and convert the synchronous TTL signals into differential signals;

and the signal output ends are respectively electrically connected with a second signal conversion module and external equipment, and can output synchronous differential signals to different external equipment.

Further, the first signal conversion module is configured to convert the TTL signal chip into a differential signal chip U10.

Further, the logic gate module can be at least arranged as a NOT gate chip, an optical coupler, a thyristor or an analog switch.

Further, the second signal conversion module is set as a TTL to differential signal conversion chip.

Furthermore, the signal enhancement device capable of eliminating electromagnetic interference further comprises an input and output protection module which is respectively electrically connected with the signal input end, the first signal conversion module, the logic gate module, the second signal conversion module and the signal output end.

The invention has the beneficial effects that: a signal enhancement device capable of eliminating electromagnetic interference comprises a signal input end, a signal output end and a signal output end, wherein the signal input end is connected with an external device and can receive differential signals sent by the external device; the first signal conversion module is electrically connected with the signal input end and used for converting the differential signal into a TTL signal; the logic gate module is electrically connected with the first signal conversion module and is used for shaping and distributing the TTL signals into a plurality of paths of synchronous TTL signals to be output; the plurality of second signal conversion modules are electrically connected with the logic gate module, and respectively receive a path of synchronous TTL signals and convert the synchronous TTL signals into differential signals; the signal output ends are respectively and electrically connected with a second signal conversion module and external equipment, and can output synchronous differential signals to different external equipment; the signal processing of the output of the sensors such as the encoder grating read head and the like can be connected in parallel to form multiple paths, and then the power output is improved, so that the consistency of the signals of the multiple paths separated by the sensors and the anti-interference capability of the signals are ensured, and the problem of mutual interference among a plurality of devices is solved.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic block diagram of a signal enhancement apparatus for eliminating EMI;

FIG. 2 is a circuit diagram of a first portion of a signal enhancement device for eliminating EMI;

FIG. 3 is a circuit diagram of a logic gate module;

FIG. 4 is a second circuit diagram of a signal enhancement device capable of eliminating EMI;

FIG. 5 is a first circuit diagram of a portion of an input/output protection module;

FIG. 6 is a second circuit diagram of the input/output protection module;

fig. 7 is a third circuit diagram of the input/output protection module.

Detailed Description

Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.

In the description of the present invention, a plurality of means is two or more, and greater than, less than, more than, etc. are understood as excluding the present number, and greater than, less than, etc. are understood as including the present number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the present invention, unless explicitly defined otherwise, the terms "disposed," "mounted," "connected," and the like are to be understood in a broad sense, and for example, may be directly connected or indirectly connected through an intermediate; can be fixedly connected, can also be detachably connected and can also be integrally formed; may be a mechanical connection; either as communication within the two elements or as an interactive relationship of the two elements. The specific meaning of the above-mentioned words in the present invention can be reasonably determined by those skilled in the art in combination with the detailed contents of the technical solutions.

Referring to fig. 1 to 7, a signal enhancing apparatus capable of eliminating electromagnetic interference includes:

the signal input end 10 is connected with an external device and can receive a differential signal sent by the external device;

the first signal conversion module 20 is electrically connected with the signal input end 10 and is used for converting the differential signal into a TTL signal;

the logic gate module 30 is electrically connected with the first signal conversion module 20 and is used for shaping and distributing the TTL signals into a plurality of paths of synchronous TTL signals to be output;

the second signal conversion modules 40 are electrically connected with the logic gate module 30, and respectively receive a path of synchronous TTL signals and convert the synchronous TTL signals into differential signals;

the signal output terminals 50 are electrically connected to a second signal conversion module 40 and the external device, respectively, and the signal output terminals 50 can output synchronous differential signals to different external devices.

In the present invention, it can be applied to the signal processing output by the sensor such as the grating reading head of the encoder, as an embodiment of the present invention, firstly, A, B, Z differential signals of the grating scale are converted by the first signal conversion module 20, then the differential signals are converted into TTL signals, and then the TTL signals pass through the logic gate module 30, which can shape the TTL signals and distribute multiple paths of synchronous TTL signals for output, wherein, the logic gate module 30 can use not gate chip, or optical coupler, thyristor or analog switch, etc., and then output the multiple paths of TTL signals to a second signal conversion module 40, the second signal conversion module 40 can convert the TTL signals into differential signals for output, wherein, the second signal conversion module 40 is configured as TTL differential signal conversion chip, which can perform signal conversion and simultaneously perform driving, and each second signal conversion module 40 is connected with a signal output terminal 50, and then divide into the multichannel output with the signal of grating chi, the multi-device only need connect on corresponding signal output port 50, and the signal synchronization between a plurality of devices is unanimous, and the strong wiring of interference killing feature is simple.

Preferably, the signal enhancement device has two second signal conversion modules 40 and two signal output ends 50, and can divide the signal of the grating ruler into two paths of synchronous differential signals, enhance the signal and then connect the signals to two different devices, so as to realize the synchronization and the anti-interference of the signal; preferably, the signal enhancement device has three second signal conversion modules 40 and three signal output ends 50, and can divide the signal of the grating ruler into three synchronous differential signals, enhance the signal and then connect the signals to three different devices, so as to realize signal synchronization and interference resistance; preferably, the signal enhancement device has four second signal conversion modules 40 and four signal output ends 50, and can divide the signal of the grating ruler into four paths of synchronous differential signals, enhance the signal and then connect the signals to four different devices, so as to achieve signal synchronization and interference resistance.

The invention has the advantages that: 1. merging a plurality of signals from a signal source; 2. the consistency of the plurality of signals is high; 3. the signal power is high and the anti-interference capability is strong; 4. the wiring is simpler, more beautiful and safer.

The first signal conversion module 20 is configured to convert the TTL signal chip differentially U10.

The logic gate module 30 may be configured as at least a not gate chip, an optocoupler, a thyristor, or an analog switch.

The second signal conversion module 40 is configured as a TTL to differential signal conversion chip.

The signal enhancement device capable of eliminating electromagnetic interference further comprises an input/output protection module electrically connected with the signal input end 10, the first signal conversion module 20, the logic gate module 30, the second signal conversion module 40 and the signal output end 50 respectively; the input side and the output side of the signal input terminal 10, the first signal conversion module 20, the logic gate module 30, the second signal conversion module 40 and the signal output terminal 50 are protected by the input and output protection module, and of course, a filtering module and the like may be further provided to optimize the signal transmission process.

It is to be understood that the present invention is not limited to the above-described embodiments, and that equivalent modifications and substitutions may be made by those skilled in the art without departing from the spirit of the present invention, and that such equivalent modifications and substitutions are to be included within the scope of the appended claims.

Claims

1. A signal enhancement device capable of rejecting electromagnetic interference, comprising:

the signal input end (10) is connected with an external device and can receive a differential signal sent by the external device;

the first signal conversion module (20) is electrically connected with the signal input end (10) and is used for converting the differential signal into a TTL signal;

the logic gate module (30) is electrically connected with the first signal conversion module (20) and is used for shaping and distributing the TTL signals into a plurality of paths of synchronous TTL signals to be output;

the second signal conversion modules (40) are electrically connected with the logic gate module (30) and respectively receive a path of synchronous TTL signals and convert the synchronous TTL signals into differential signals;

and the signal output ends (50) are respectively electrically connected with the second signal conversion module (40) and external equipment, and the signal output ends (50) can output synchronous differential signals to different external equipment.

2. The signal enhancement device for eliminating electromagnetic interference according to claim 1, wherein: the first signal conversion module (20) is arranged as a differential conversion TTL signal chip U10.

3. The signal enhancement device for eliminating electromagnetic interference according to claim 1, wherein: the logic gate module (30) can be at least set as a NOT gate chip, an optical coupler, a thyristor or an analog switch.

4. The signal enhancement device for eliminating electromagnetic interference according to claim 1, wherein: the second signal conversion module (40) is set as a TTL (transistor-transistor logic) differential signal conversion chip.

5. The signal enhancement device for eliminating electromagnetic interference according to claim 1, wherein: the signal conversion circuit further comprises an input and output protection module which is respectively and electrically connected with the signal input end (10), the first signal conversion module (20), the logic gate module (30), the second signal conversion module (40) and the signal output end (50).