CN210867616U - Intelligent denoising circuit and device for cable signal transmission - Google Patents
Intelligent denoising circuit and device for cable signal transmission Download PDFInfo
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- CN210867616U CN210867616U CN201922325395.3U CN201922325395U CN210867616U CN 210867616 U CN210867616 U CN 210867616U CN 201922325395 U CN201922325395 U CN 201922325395U CN 210867616 U CN210867616 U CN 210867616U
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Abstract
The utility model relates to a circuit and device are fallen to noise to cable signal transmission intelligence, its circuit includes first binding post, second binding post, frequency detection circuit, main control circuit and filter circuit, first binding post is connected with frequency detection circuit's input and filter circuit's input electricity respectively, frequency detection circuit's output is connected with main control circuit's input electricity, main control circuit's output is connected with filter circuit's control signal input electricity, filter circuit's output is connected with second binding post electricity. The utility model discloses a circuit and device are fallen to noise to cable signal transmission intelligence, through the frequency of real-time transmission signal on the frequency detection circuit detection cable, then filter circuit falls to make an uproar according to preset's target frequency range to real-time transmission signal on the cable, realizes filtering interference signal, and the frequency band of falling to noise through the adjustable filter circuit of main control circuit simultaneously uses the flexibility strong, fall to the noise frequency adjustable, circuit structure is simple, convenient and practical.
Description
Technical Field
The utility model relates to a power cable detects technical field, especially relates to a circuit and device are fallen to noise to cable signal transmission intelligence.
Background
In signal transmission detection, an unavoidable noise interference signal always exists in a surrounding environment, and an interference signal source is mainly divided into three sources according to different interference sources: interference caused by front-end equipment, interference in a transmission process and interference caused by terminal equipment. These interference signals will affect the detection of the useful signals to a certain extent, in the case of serious field interference, even if the input end of the electronic instrument is not connected with any signal, the "self-starting" phenomenon of the head pointer will be generated, and one critical factor is that the test instrument has no inhibition capability on the interference signals, so that a filter must be used to filter out the unwanted interference signals.
In the existing interference signal test, an RC filter or an LC filter is widely used at present, but the designer must be required to know the noise frequency range in advance, and the design is good in advance when designing the circuit, the flexibility is not strong, and the denoising frequency is single.
Disclosure of Invention
The utility model aims to solve the technical problem that to the not enough of above-mentioned prior art, provide a cable signal transmission intelligence and denoise circuit and device, the flexibility of having overcome simple wave filter commonly used is not strong and the single shortcoming of frequency of just denoising.
The utility model provides an above-mentioned technical problem's technical scheme as follows: the utility model provides a cable signal transmission intelligence circuit of removing noise, includes first binding post, second binding post, frequency detection circuit, main control circuit and filter circuit, first binding post respectively with the input of frequency detection circuit with the input electricity of filter circuit is connected, the output of frequency detection circuit with the input electricity of main control circuit is connected, the output of main control circuit with the control signal input electricity of filter circuit is connected, the output of filter circuit with second binding post electricity is connected.
The utility model has the advantages that: the utility model discloses a circuit of making an uproar is fallen to cable signal transmission intelligence, through the frequency of real-time transmission signal on the frequency detection circuit detection cable, then filter circuit falls to make an uproar according to preset's target frequency range to real-time transmission signal on the cable, realizes filtering interference signal, passes through simultaneously main control circuit is adjustable filter circuit's the frequency band of making an uproar uses the flexibility strong, fall the adjustable frequency of making an uproar, and circuit structure is simple, convenient and practical.
On the basis of the technical scheme, the utility model discloses can also do as follows the improvement:
further: the frequency detection circuit comprises an amplifying circuit, a Schmitt trigger U3 and a counter U4, wherein the first wiring terminal is electrically connected with the input end of the amplifying circuit, the output end of the amplifying circuit is electrically connected with the input end of the Schmitt trigger U3, the output end of the Schmitt trigger U3 is electrically connected with the input end of the counter U4, and the output end of the counter U4 is electrically connected with the input end of the main control circuit.
The beneficial effects of the further scheme are as follows: signals transmitted on the cable are preliminarily amplified through the amplifying circuit, the amplified irregular analog signals are converted into digital square wave signals through the Schmitt trigger U3, the detection of the signal period and the frequency is facilitated, the digitized square wave signals are divided by the counter firstly and then counted, and the frequency of the signals is accurately detected.
Further: the amplifying circuit comprises a capacitor C1, a capacitor C2, a capacitor C13, a capacitor C14, a resistor R11, a resistor R12, a resistor R13, a resistor R14 and a triode Q1, wherein the capacitor C1 and the capacitor C2 are connected in parallel between the first connecting terminal and the base of the triode Q1, the resistor R12 is electrically connected between the base of the triode Q1 and an external power supply 5V, the base of the triode Q1 is grounded through the resistor R13, the collector of the triode Q1 is electrically connected with the external power supply 5V through the resistor R11, the collector of the triode Q1 is electrically connected with the input end of the Schmitt trigger U3, and the resistor R14, the capacitor C13 and the capacitor C14 are connected in parallel between the emitter of the triode Q1 and the ground.
The beneficial effects of the further scheme are as follows: the direct current component in the cable transmission signal can be filtered through the capacitor C1 and the capacitor C2 to play a role in blocking the direct current, then the signal is amplified through the triode Q1 and output to the Schmitt trigger U3, and the signal is conveniently digitized to detect the frequency of the signal.
Further: the Schmitt trigger U3 is a Schmitt trigger chip with the model number 74HCT 14D.
Further: the counter U4 adopts a counter chip with the model 74HC 390.
Further: the main control circuit adopts a microprocessor chip with the model of STM32F103VCT 6.
Further: the filter circuit comprises a digital programmable capacitor and a digital programmable resistor, the digital programmable capacitor and the digital programmable resistor are connected in series and then are connected with an input signal, and two ends of the digital programmable resistor output filtered signals.
The beneficial effects of the further scheme are as follows: the digital programmable capacitor and the digital programmable resistor form an RC filter loop, so that clutter filtering processing can be conveniently carried out on signals transmitted on the cable according to a preset target denoising frequency range, and the purpose of removing dryness is achieved.
Further: the cable signal transmission intelligent denoising circuit further comprises a key circuit, and the key circuit is electrically connected with the main control circuit and used for setting target denoising frequency range parameters.
The beneficial effects of the further scheme are as follows: the case circuit can be used for conveniently inputting and setting a target denoising frequency range and conveniently adjusting the target denoising frequency range, so that the whole detection circuit is higher in flexibility and the universality is enhanced.
Further: the cable signal transmission intelligent denoising circuit further comprises a display screen, wherein the display screen is electrically connected with the main control circuit and used for displaying the target denoising frequency range parameters set through the key circuit.
The beneficial effects of the further scheme are as follows: the display screen can conveniently and visually display the target denoising frequency range parameters set by the key circuit, so that detection personnel can conveniently adjust the target denoising frequency range parameters at any time, and the user experience is improved.
The utility model provides a cable signal transmission intelligence device of making an uproar, including the body of cuboid interface with cable signal transmission intelligence circuit of making an uproar, keying circuit with the display screen is inlayed respectively and is set up on the preceding lateral wall of body, first binding post and second binding post set up respectively on the lateral wall of body, frequency detection circuit, main control circuit and filter circuit set up respectively in the body.
The utility model discloses a device is fallen to noise to cable signal transmission intelligence, through the frequency of real-time transmission signal on the frequency detection circuit detection cable, then filter circuit falls to make an uproar according to preset's target frequency range to real-time transmission signal on the cable, realizes filtering interference signal, passes through simultaneously main control circuit is adjustable filter circuit's the frequency band of falling to make an uproar uses the flexibility strong, fall to make an uproar frequency adjustable, and whole device volume is less, conveniently carries simple and practical.
Drawings
Fig. 1 is a schematic structural diagram of the intelligent denoising circuit for cable signal transmission according to the present invention;
fig. 2 is a schematic circuit diagram of the amplifying circuit of the present invention;
fig. 3 is the utility model discloses a device's structural schematic is fallen in noise to cable signal transmission intelligence.
In the drawings, the components represented by the respective reference numerals are listed below:
1. the body, 2, keying circuit, 3, display screen, 4, first binding post, 5, second binding post, 6, frequency detection circuit, 7, main control circuit, 8, filter circuit.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
As shown in fig. 1, an intelligent denoising circuit for cable signal transmission includes a first connection terminal 4, a second connection terminal 5, a frequency detection circuit 6, a main control circuit 7 and a filter circuit 8, where the first connection terminal 4 is electrically connected to an input terminal of the frequency detection circuit 6 and an input terminal of the filter circuit 8, an output terminal of the frequency detection circuit 6 is electrically connected to an input terminal of the main control circuit 7, an output terminal of the main control circuit 7 is electrically connected to a control signal input terminal of the filter circuit 8, and an output terminal of the filter circuit 8 is electrically connected to the second connection terminal 5.
The signal transmission cable is connected into the denoising circuit from the first wiring terminal 4, and is output from the second wiring terminal 5 on the other side after being filtered by the denoising circuit, and the output transmission signal on the cable is denoised.
The utility model discloses a circuit of making an uproar is fallen to cable signal transmission intelligence, through the frequency of real-time transmission signal on the frequency detection circuit 6 detection cable, then filter circuit 8 is fallen to noise according to preset's target frequency range to real-time transmission signal on the cable, realizes filtering interference signal, passes through simultaneously main control circuit 7 is adjustable filter circuit 8 falls the frequency band of making an uproar, uses the flexibility strong, fall the adjustable frequency of making an uproar, and circuit structure is simple, convenient and practical.
In one or more embodiments of the present invention, the first connection terminal 4 and the second connection terminal 5 are both push-type connection terminals.
In one or more embodiments of the present invention, the frequency detection circuit 6 includes an amplifying circuit, a schmitt trigger U3 and a counter U4, the first connection terminal 4 is electrically connected to an input terminal of the amplifying circuit, an output terminal of the amplifying circuit is electrically connected to an input terminal of the schmitt trigger U3, an output terminal of the schmitt trigger U3 is electrically connected to an input terminal of the counter U4, and an output terminal of the counter U4 is electrically connected to an input terminal of the main control circuit 7. Signals transmitted on the cable are preliminarily amplified through the amplifying circuit, the amplified irregular analog signals are converted into digital square wave signals through the Schmitt trigger U3, the detection of the signal period and the frequency is facilitated, the digitized square wave signals are divided by the counter firstly and then counted, and the frequency of the signals is accurately detected.
As shown in fig. 2, in particular, in one or more embodiments provided in the present invention, the amplifying circuit includes a capacitor C1, a capacitor C2, a capacitor C13, a capacitor C14, a resistor R11, a resistor R12, a resistor R13, a resistor R14, and a transistor Q1, the capacitor C1 and the capacitor C2 are connected in parallel between the first connection terminal 4 and the base of the transistor Q1, the resistor R12 is electrically connected between the base of the transistor Q1 and an external power source 5V, the base of the transistor Q1 is grounded through the resistor R13, the collector of the transistor Q1 is electrically connected to the external power source 5V through the resistor R11, the collector of the transistor Q1 is electrically connected to the input terminal of the schmitt trigger U3, and the resistor R14, the capacitor C13, and the capacitor C14 are connected in parallel between the emitter of the transistor Q1 and the ground. The direct current component in the cable transmission signal can be filtered through the capacitor C1 and the capacitor C2 to play a role in blocking the direct current, then the signal is amplified through the triode Q1 and output to the Schmitt trigger U3, and the signal is conveniently digitized to detect the frequency of the signal.
Preferably, in one or more embodiments provided by the present invention, the schmitt trigger U3 is a schmitt trigger chip with a model 74HCT 14D.
Preferably, in one or more embodiments provided by the present invention, the counter U4 is a counter chip with a model 74HC 390.
Preferably, in one or more embodiments provided by the present invention, the main control circuit 7 employs a microprocessor chip of model STM32F103VCT 6.
Preferably, in one or more embodiments provided in the present invention, the filter circuit 8 includes a digital programmable capacitor and a digital programmable resistor, and the digital programmable capacitor and the digital programmable resistor are connected in series and then connected to an input signal, and both ends of the digital programmable resistor output a filtered signal. The digital programmable capacitor and the digital programmable resistor form an RC filter loop, so that clutter filtering processing can be conveniently carried out on signals transmitted on the cable according to a preset target denoising frequency range, and the purpose of removing dryness is achieved.
The utility model discloses in, the digital programmable capacitor adopts the digital programmable capacitor that the model is MAX1474, digital programmable resistor adopts the digital programmable resistor that the model is DS 3902.
Preferably, in the one or more embodiments provided by the utility model, cable signal transmission intelligence remove noise circuit still include key circuit 2, key circuit 2 with main control circuit 7 electricity is connected for set up the target and remove noise frequency range parameter. The case circuit 2 can conveniently input and set a target denoising frequency range, and conveniently adjust the target denoising frequency range, so that the whole detection circuit has stronger flexibility and the universality is enhanced.
Preferably, in the one or more embodiments provided by the utility model, cable signal transmission intelligence remove noise circuit still include display screen 3, the display screen with main control circuit 7 electricity is connected, and is used for showing through keying circuit 2 sets up the frequency range parameter is removed to the target. The display screen 3 can conveniently and visually display the target denoising frequency range parameters set by the key circuit 2, so that detection personnel can conveniently adjust the target denoising frequency range parameters at any time, and the user experience is improved.
As shown in fig. 3, an intelligent denoising device for cable signal transmission comprises a main body 1 with a cuboid interface and an intelligent denoising circuit for cable signal transmission, wherein the key circuit 2 and the display screen 3 are respectively embedded on the front side wall of the main body 1, the first wiring terminal 4 and the second wiring terminal 5 are respectively arranged on the side wall of the main body 1, and the frequency detection circuit 6, the main control circuit 7 and the filter circuit 8 are respectively arranged in the main body 1.
The utility model discloses a device is fallen noise to cable signal transmission intelligence, through the frequency of real-time transmission signal on the frequency detection circuit 6 detection cable, then filter circuit 8 is fallen noise to the real-time transmission signal on the cable according to preset's target frequency range, realizes filtering interference signal, passes through simultaneously main control circuit 7 is adjustable filter circuit 8 falls the frequency band of making noise, uses the flexibility strong, falls the frequency of making noise adjustable, and whole device volume is less, conveniently carries simple and practical.
The key circuit 2 sets an effective denoising frequency range to the main control circuit 7 in advance, an input signal detects the frequency through the frequency detection circuit 6, then the frequency detection circuit 6 feeds the signal frequency back to the main control circuit 7, the main control circuit 7 compares the detected frequency with a preset target denoising frequency, if the detected frequency is not in the target denoising frequency range, the main control circuit 7 controls the filter circuit 8 to adjust a denoising frequency band, so that the signal frequency is in the target denoising frequency range, filtering processing is carried out, and finally an output signal is obtained, wherein the filter unit uses a digital programmable capacitor and a digital programmable resistor.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (10)
1. The utility model provides a circuit of making an uproar is fallen to cable signal transmission intelligence which characterized in that: including first binding post (4), second binding post (5), frequency detection circuit (6), main control circuit (7) and filter circuit (8), first binding post (4) respectively with the input of frequency detection circuit (6) with the input electricity of filter circuit (8) is connected, the output of frequency detection circuit (6) with the input electricity of main control circuit (7) is connected, the output of main control circuit (7) with the control signal input electricity of filter circuit (8) is connected, the output of filter circuit (8) with second binding post (5) electricity is connected.
2. The cable signal transmission intelligent denoising circuit of claim 1, wherein: the frequency detection circuit (6) comprises an amplifying circuit, a Schmitt trigger U3 and a counter U4, wherein the first connecting terminal (4) is electrically connected with the input end of the amplifying circuit, the output end of the amplifying circuit is electrically connected with the input end of the Schmitt trigger U3, the output end of the Schmitt trigger U3 is electrically connected with the input end of the counter U4, and the output end of the counter U4 is electrically connected with the input end of the main control circuit (7).
3. The cable signal transmission intelligent denoising circuit of claim 2, wherein: the amplifying circuit comprises a capacitor C1, a capacitor C2, a capacitor C13, a capacitor C14, a resistor R11, a resistor R12, a resistor R13, a resistor R14 and a triode Q1, wherein the capacitor C1 and the capacitor C2 are connected in parallel between a first connecting terminal (4) and the base of a triode Q1, the resistor R12 is electrically connected between the base of the triode Q1 and an external power supply 5V, the base of the triode Q1 is grounded through the resistor R13, the collector of the triode Q1 is electrically connected with the external power supply 5V through the resistor R11, the collector of the triode Q1 is electrically connected with the input end of the Schmitt trigger U3, and the resistor R14, the capacitor C13 and the capacitor C14 are connected in parallel between the emitter of the triode Q1 and the ground.
4. The cable signal transmission intelligent denoising circuit of claim 2, wherein: the Schmitt trigger U3 is a Schmitt trigger chip with the model number 74HCT 14D.
5. The cable signal transmission intelligent denoising circuit of claim 2, wherein: the counter U4 adopts a counter chip with the model 74HC 390.
6. The cable signal transmission intelligent denoising circuit of claim 1, wherein: the main control circuit (7) adopts a microprocessor chip with the model of STM32F103VCT 6.
7. The cable signal transmission intelligent denoising circuit of claim 1, wherein: the filter circuit (8) comprises a digital programmable capacitor and a digital programmable resistor, the digital programmable capacitor and the digital programmable resistor are connected in series and then are connected with an input signal, and two ends of the digital programmable resistor output filtered signals.
8. The intelligent denoising circuit for cable signal transmission according to any one of claims 1-7, wherein: the device is characterized by further comprising a key circuit (2), wherein the key circuit (2) is electrically connected with the main control circuit (7) and is used for setting a target denoising frequency range parameter.
9. The cable signal transmission intelligent denoising circuit of claim 8, wherein: the device is characterized by further comprising a display screen (3), wherein the display screen is electrically connected with the main control circuit (7) and is used for displaying the target denoising frequency range parameters set through the key circuit (2).
10. The utility model provides a cable signal transmission intelligence device of making an uproar which characterized in that: the intelligent denoising circuit for cable signal transmission comprises a cuboid interface body (1) and the intelligent denoising circuit for cable signal transmission, wherein the key circuit (2) and the display screen (3) are respectively embedded on the front side wall of the cuboid interface body (1), the first wiring terminal (4) and the second wiring terminal (5) are respectively arranged on the side wall of the cuboid interface body (1), and the frequency detection circuit (6), the main control circuit (7) and the filter circuit (8) are respectively arranged in the cuboid interface body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922325395.3U CN210867616U (en) | 2019-12-21 | 2019-12-21 | Intelligent denoising circuit and device for cable signal transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922325395.3U CN210867616U (en) | 2019-12-21 | 2019-12-21 | Intelligent denoising circuit and device for cable signal transmission |
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| Publication Number | Publication Date |
|---|---|
| CN210867616U true CN210867616U (en) | 2020-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922325395.3U Active CN210867616U (en) | 2019-12-21 | 2019-12-21 | Intelligent denoising circuit and device for cable signal transmission |
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|---|---|
| CN (1) | CN210867616U (en) |
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- 2019-12-21 CN CN201922325395.3U patent/CN210867616U/en active Active
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