CN218162496U - Signal transmission device and equipment - Google Patents
Signal transmission device and equipment Download PDFInfo
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- CN218162496U CN218162496U CN202222036309.9U CN202222036309U CN218162496U CN 218162496 U CN218162496 U CN 218162496U CN 202222036309 U CN202222036309 U CN 202222036309U CN 218162496 U CN218162496 U CN 218162496U
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Abstract
The utility model provides a signal transmission device and equipment relates to the power electronics field. The device includes: a plurality of signal modulation circuits corresponding to the plurality of signal channels one to one; the signal demodulation circuit is electrically connected with the signal modulation circuit, each signal modulation circuit in the signal modulation circuits modulates a first signal with a first frequency in a corresponding signal channel to obtain a second signal with a second frequency, and each signal demodulation circuit in the signal demodulation circuits demodulates the corresponding second signal to obtain a third signal with the first frequency. The utility model discloses can restrain the crosstalk between the signal and take place.
Description
Technical Field
The utility model relates to a power electronics field especially relates to a signal transmission device and equipment.
Background
A large amount of sensing equipment exists in the existing commonly used electronic detection equipment and instruments and is used for detecting external signals, and the products at the present stage pursue the multifunction of the equipment and the portability of the volume. However, when a large number of sensor signals coexist in the same device, signal crosstalk occurs. Crosstalk between wires mostly occurs between parallel wires on a Printed Circuit Board (PCB), and the strength of the crosstalk is related to the distributed capacitance and mutual inductance between two adjacent wires and the impedance of the Circuit itself, which severely causes the device to suffer interference, thereby degrading the performance of the product device or preventing the product device from working normally.
At present, in order to avoid crosstalk among various signals, measures such as reducing coupling length, increasing line spacing, reducing distance from a line to a plane layer, purifying an interference source and the like are mainly carried out on interfered signals in PCB layout routing. In consideration of this, the method of increasing the line pitch is often adopted in the design to suppress crosstalk noise. However, since the interfaces of the sensors of the device are closely arranged and the small volume factor of the device is considered, it is not ideal to suppress crosstalk by increasing the line spacing. In addition, increasing the line spacing layout requires a skilled designer to design by experience, has no fixed form, and has an uncontrollable effect of suppressing signal crosstalk.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the present invention is to provide a signal transmission device and an apparatus, which can suppress signal crosstalk.
According to the utility model discloses an aspect provides a signal transmission device, include: a plurality of signal modulation circuits in one-to-one correspondence with the plurality of signal channels; the signal demodulation circuit is electrically connected with the signal modulation circuit, each signal modulation circuit in the signal modulation circuits modulates a first signal with a first frequency in a corresponding signal channel to obtain a second signal with a second frequency, and each signal demodulation circuit in the signal demodulation circuits demodulates the corresponding second signal to obtain a third signal with the first frequency.
In some embodiments, a sequential sampling circuit electrically connected to each signal modulation circuit and each signal demodulation circuit, respectively; and an average sampling circuit electrically connected to each of the signal modulation circuits and each of the signal demodulation circuits, respectively, wherein the continuous sampling circuit continuously samples the third signal when a data change rate of the third signal is greater than a change rate threshold, and the average sampling circuit average-samples the third signal when the data change rate of the third signal is less than or equal to the change rate threshold.
In some embodiments, each signal modulation circuit comprises: an oscillation circuit; and an amplifying circuit electrically connected to the oscillating circuit.
In some embodiments, an oscillation circuit includes: a first variable capacitor; a second capacitor, a first end of the second capacitor being connected to a first end of the first variable capacitor; and a first end of the first inductor is connected with the second end of the first variable capacitor and used as a first output end of the signal modulation circuit, and a second end of the first inductor is connected with the second end of the second capacitor and used as a second output end of the signal modulation circuit.
In some embodiments, a data buffer electrically connected to the continuous sampling circuit and the average sampling circuit, respectively; and a data comparison circuit electrically connected to the data buffer.
In some embodiments, the amplification circuit comprises: the circuit comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a triode, a third capacitor and a fourth capacitor, wherein the first end of the first resistor is connected with the first end of the second resistor; the second end of the first resistor is connected with the first end of the fourth resistor and is connected with a power supply end; the second end of the fourth resistor is connected with the first end of the triode; the control end of the triode is respectively connected with the first end of the first resistor and the first end of the second resistor; the second end of the triode is connected with the first end of the third resistor and respectively connected with the first end of the second capacitor and the first end of the first variable capacitor; the second end of the third resistor is connected with the second end of the second resistor and is grounded; the first end of the third capacitor is respectively connected with the first end of the first resistor and the first end of the second resistor; the second end of the third capacitor is connected with the second end of the second resistor; a first end of the fourth capacitor is connected with a second end of the fourth resistor; the second terminal of the fourth capacitor is connected to the second terminal of the second capacitor.
In some embodiments, the third capacitor and the fourth capacitor are coupling capacitors.
In some embodiments, each signal demodulation circuit comprises: the resonance circuit is electrically connected with the corresponding signal modulation circuit; and an envelope detection circuit electrically connected to the resonant tank circuit.
In some embodiments, the resonant tank circuit comprises: the primary side of the transformer is connected with the output end of the signal modulation circuit; and a fifth capacitor connected in parallel with the secondary side of the transformer.
In some embodiments, the envelope detection circuit comprises: a single-phase conduction device; a fifth resistor connected in parallel to the fifth capacitor through the single-phase conduction device; and a sixth capacitor connected in parallel with the fifth resistor.
According to the utility model discloses an on the other hand still provides an equipment, include: the signal transmission device is provided.
The embodiment of the utility model provides an in, consider that sensing signal is in transmission process, the influence that easily receives the aspect of the frequency leads to producing and crosstalks, adopts the mode of modulating earlier and then demodulating to handle the signal. The modulation adopts a frequency modulation mode, the demodulation adopts a frequency discrimination mode, the frequency of a signal carrier is changed after the frequency modulation is carried out on the signal, the crosstalk among signals can be inhibited after the frequency of each path of signal is changed, and the problem that the performance of product equipment is degraded or the product equipment cannot work normally due to the signal crosstalk is solved.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
The invention will be more clearly understood from the following detailed description, with reference to the accompanying drawings, in which:
fig. 1 is a schematic structural diagram of some embodiments of the signal transmission device of the present invention;
fig. 2 is a schematic structural diagram of another embodiment of the signal transmission device of the present invention;
fig. 3 is a schematic diagram of some embodiments of a signal modulation circuit according to the present invention;
fig. 4 is a schematic diagram of the modulation and demodulation waveforms of the present invention;
fig. 5 is a schematic diagram of some embodiments of the signal demodulation circuit of the present invention; and
fig. 6 is a schematic structural diagram of another embodiment of the signal transmission device according to the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention.
Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings.
When the system involves a plurality of analog sensor signals, the plurality of sensor signals need to be processed, the processed signals are sampled, and the signals obtained by sampling are internally processed.
Fig. 1 is a schematic structural diagram of some embodiments of the signal transmission device of the present invention. The signal transmission apparatus includes a plurality of signal modulation circuits 110 corresponding to a plurality of signal channels one to one and a plurality of signal demodulation circuits 120 corresponding to a plurality of signal modulation circuits one to one. One signal demodulation circuit 120 is electrically connected to one corresponding signal modulation circuit 110, and one sensor corresponds to one signal channel, where a plurality of fingers is two or more.
Each signal modulation circuit 110 of the plurality of signal modulation circuits is configured to modulate a first signal having a first frequency within a respective signal path resulting in a second signal having a second frequency. Each signal demodulation circuit 120 of the plurality of signal demodulation circuits is configured to demodulate a respective second signal resulting in a third signal having the first frequency.
In the above embodiment, considering that the sensing signal is susceptible to frequency influence to generate crosstalk during transmission, the signal is processed in a manner of modulation and demodulation. The modulation adopts a frequency modulation mode, the demodulation adopts a frequency discrimination mode, the frequency of a signal carrier is changed after the frequency modulation is carried out on the signal, the crosstalk among signals can be inhibited after the frequency of each path of signal is changed, and the problem that the performance of product equipment is degraded or the product equipment cannot work normally due to the signal crosstalk is solved.
After obtaining the plurality of third signals, the plurality of third signals need to be sampled.
Fig. 2 is a schematic structural diagram of another embodiment of the signal transmission apparatus according to the present invention, which further includes a continuous sampling circuit 210 and an average sampling circuit 220.
The continuous sampling circuit 210 is configured to continuously sample the third signal if the data rate of change of the third signal is greater than a rate of change threshold. The average sampling circuit 220 is configured to average sample the third signal if the data rate of change of the third signal is less than or equal to a rate of change threshold. The continuous sampling circuit 210 and the average sampling circuit 220 are electrically connected to the signal demodulation circuit 120, respectively.
The specific result of the sampling circuit is not limiting.
In some embodiments, the continuous sampling circuit 210 is further configured to continuously sample the third signal if there are a plurality of times that the rate of change of the data is greater than the rate of change threshold for the third signal. The average sampling circuit 220 is configured to average sample the third signal if the third signal has a multiple data change rate less than or equal to a change rate threshold.
In the above embodiment, the data conversion rate of the signal is greater than the threshold, which indicates that the current environment is unstable, and there is a sudden change in the signal, and real-time sampling should be performed at this time. The data conversion rate of the signal is smaller than or equal to the threshold value, which indicates that the current environment is stable, and the data accuracy can be ensured by adopting average sampling at the moment. The embodiment realizes stable communication of multi-sensor signals and improves the accuracy and the real-time performance of signal sampling.
Fig. 3 is a schematic structural diagram of some embodiments of the signal modulation circuit of the present invention. The signal modulation circuit includes an oscillation circuit 310 and a discharge circuit 320. The oscillating circuit 310 is configured to modulate a first signal and the amplifying circuit 320 is configured to provide energy to the oscillating circuit.
In some embodiments, the oscillating circuit 310 includes a first variable capacitor C1, a second capacitor C2, and a first inductor L.
The first variable capacitor C1 is a signal modulation device configured to detect a first signal, and the first variable capacitor C1 is a capacitance sensing device. A first end of the second capacitor C2 is connected to a first end of the first variable capacitor C1. A first end of the first inductor L is connected to a second end of the first variable capacitor C1 and serves as a first output terminal of the signal modulation circuit, and a second end of the first inductor L is connected to a second end of the second capacitor C2 and serves as a second output terminal of the signal modulation circuit.
An oscillation circuit is composed of a first variable capacitor C1, a second capacitor C2 and a first inductor L, and the output oscillation frequency is
The output waveform of (1). The oscillation frequency f of the signal is changed by changing the magnitude of the capacitance of the first variable capacitor C1.
In some embodiments, the amplifying circuit 320 includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a transistor Q, a third capacitor C3, and a fourth capacitor C4. A first end of the first resistor R1 is connected to a first end of the second resistor R2; the second end of the first resistor R1 is connected to the first end of the fourth resistor R4 and to a power supply terminal; the second end of the fourth resistor R4 is connected with the first end of the triode Q; the control end of the triode Q is respectively connected with the first end of the first resistor R1 and the first end of the second resistor R2; the second end of the triode Q is connected with the first end of the third resistor R3, and is respectively connected with the first end of the second capacitor C2 and the first end of the first variable capacitor C1; a second end of the third resistor R3 is connected to a second end of the second resistor R2 and is grounded; a first end of the third capacitor C3 is connected to a first end of the first resistor R1 and a first end of the second resistor R2, respectively; a second end of the third capacitor C3 is connected with a second end of the second resistor R2; a first end of the fourth capacitor C4 is connected with a second end of the fourth resistor R4; a second terminal of the fourth capacitor C4 is connected to a second terminal of the second capacitor C2.
The third capacitor C3 and the fourth capacitor C4 are coupling capacitors; the triode Q is an NPN triode, the first end of the triode Q is a collector, the second end of the triode Q is an emitter, and the control end of the triode Q is a base; the first resistor R1 and the second resistor R2 provide stable base voltage for the triode Q; the fourth capacitor C4 supplies the second capacitor C2 with energy lost in oscillation, and the fourth resistor R4 and the third resistor R3 current-limit the collector and emitter of the transistor Q.
When the current of the signal modulation circuit flows clockwise, the current flowing out through the first resistor L is divided, one current flows to the first variable capacitor C1, the other current flows to the triode Q through the third capacitor C3, at the moment, the triode Q is conducted, the current is amplified by (1 + beta) times to charge the second capacitor C2, and the energy is provided by the fourth capacitor C4. When the current flows counterclockwise, the current flowing through the second capacitor C2 is shunted, one current flows to the first variable capacitor C1, the other current flows to the third resistor R3, the potential of the emitter of the triode Q is increased due to the current flowing to the third resistor R3, the conduction capability of the triode Q is reduced, and the potential of the collector of the triode Q is increased to charge the fourth capacitor C4. The oscillation waveform Us output from the signal modulation circuit is shown in fig. 4.
In the embodiment, according to the capacitance value change characteristic of the sensitive component, the LC oscillation frequency is changed to realize signal frequency modulation, so that the sensor signal frequency is differentiated, the probability of performance degradation of product equipment caused by signal crosstalk can be reduced, and the problems of increasing the wiring distance and the number of layers of the PCB are solved.
Fig. 5 is a schematic structural diagram of some embodiments of the signal demodulation circuit of the present invention. The signal demodulation circuit includes a resonant tank circuit 510 and an envelope detection circuit 520. The resonant tank circuit 510 is configured to control a change in the amplitude of the second signal voltage with a change in the resonant frequency. The envelope detection circuit 520 is configured to restore the frequency of the second signal to the first frequency and extract the voltage amplitude of the second signal.
The resonant tank circuit 510 includes a secondary side of the transformer T and a fifth capacitor C5, the primary side of the transformer T is connected to the output end of the signal modulation circuit, the fifth capacitor C5 is connected in parallel to the secondary side of the transformer T, and the fifth capacitor C5 may be a variable capacitor capable of changing the resonant frequency. The envelope detection circuit 520 includes a single-phase conduction device VD, which is, for example, a diode, a fifth resistor RL, and a sixth capacitor C6. The fifth resistor RL is connected in parallel with the fifth capacitor C5 through the single-phase conducting device VD, the sixth capacitor C6 is connected in parallel with the fifth resistor RL, and both ends of the sixth capacitor C6 serve as output ends of the signal demodulation circuit.
The voltage across the fifth capacitor C is higher when the frequency of the second signal is close to the resonant frequency of the resonant tank circuit 510, and the voltage across the fifth capacitor C5 is lower when the frequency of the second signal is far from the frequency of the resonant tank circuit 510. And controlling the change of the voltage amplitude value by using the change of the frequency modulation signal.
The voltage output by the fifth capacitor C5 is subjected to envelope detection by the diode VD, and a high-frequency carrier signal is filtered by the sixth capacitor C6. The waveform Uo output by the sixth capacitor C6 is shown in fig. 4.
The utility model discloses an in other embodiments, sensor signal is through signal modem back, samples through sampling circuit. The utility model discloses whether stable and the accuracy of considering the signal according to the change of sensor environment, sensing signal adopts continuous sampling and two kinds of modes of average sampling in signal sampling. As shown in fig. 6, the signal transmission apparatus further includes a data buffer 610 and a data comparison circuit 620.
The data buffer 610 is electrically connected to the continuous sampling circuit 210 and the average sampling circuit 220, respectively, and the data comparison circuit is electrically connected to the data buffer 610 and to the continuous sampling circuit 210 and the average sampling circuit 220.
The data buffer 610 is configured to store data of the signal sampled by the continuous sampling circuit 210 and the average sampling circuit 220. The data comparison circuit 620 is configured to determine whether a rate of change of data in the data buffer 610 is greater than a rate of change threshold. The data comparison circuit 620 is, for example, a comparator.
In some embodiments, the data comparison circuit 620 is further configured to determine whether there is a plurality of times that the rate of change of the continuous data in the data buffer is greater than the rate threshold, so that the determination result is more accurate.
In some embodiments, when the system starts operating, a continuous sampling mode is adopted, data is stored through the data buffer 610, and the data buffer 610 can store n data amount, where n is a natural number. When there are C1 times of continuous data change rate
In this case, the average sampling circuit 220 performs average sampling, and may be set to obtain an average value every K data. Wherein D is n The nth data, b% is a change rate threshold value, and K is a natural number. In the average sampling process, there are C2 continuous data change rates in the data stored in the data buffer 610
Continuous sampling is performed by using a continuous sampling circuit.
In the above embodiment, if the change rate of the continuous data is greater than the change rate threshold value for multiple times, it indicates that there is a sudden change in the environment where the sensor is located, and the signal acquired by the sensor is unstable, and at this time, continuous sampling is required to process the data acquired by the sensing signal in real time. If the change rate of the continuous data is smaller than or equal to the change rate threshold value for a plurality of times, the sensor is indicated to be in a stable environment, and the accuracy of the data is ensured by calculating the average value of the acquired data.
The present invention has been described in detail so far. Some details which are well known in the art have not been described in order to avoid obscuring the concepts of the present invention. Those skilled in the art can now fully appreciate how to implement the teachings of the present invention based on the foregoing description.
Although some specific embodiments of the present invention have been described in detail by way of illustration, it should be understood by those skilled in the art that the above illustration is only for purposes of illustration and is not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (11)
1. A signal transmission apparatus, comprising:
a plurality of signal modulation circuits corresponding to the plurality of signal channels one to one;
a plurality of signal demodulation circuits in one-to-one correspondence with the plurality of signal modulation circuits, wherein one signal demodulation circuit is electrically connected to one signal modulation circuit,
each of the plurality of signal modulation circuits modulates a first signal having a first frequency in a corresponding signal path to obtain a second signal having a second frequency, and each of the plurality of signal demodulation circuits demodulates the corresponding second signal to obtain a third signal having the first frequency.
2. The signal transmission apparatus according to claim 1, further comprising:
the continuous sampling circuit is electrically connected with each signal modulation circuit and each signal demodulation circuit respectively; and
an average sampling circuit electrically connected to each signal modulation circuit and each signal demodulation circuit, respectively, wherein,
the third signal is continuously sampled by the continuous sampling circuit if the data change rate of the third signal is greater than a change rate threshold, and the third signal is average sampled by the average sampling circuit if the data change rate of the third signal is less than or equal to the change rate threshold.
3. The signal transmission apparatus according to claim 1 or 2, wherein each of the signal modulation circuits comprises:
an oscillation circuit; and
and the amplifying circuit is electrically connected with the oscillating circuit.
4. The signal transmission apparatus according to claim 3, wherein the oscillation circuit comprises:
a first variable capacitor;
a second capacitor, a first end of the second capacitor being connected to a first end of the first variable capacitor; and
a first inductor having a first end connected to the second end of the first variable capacitor and serving as a first output end of the signal modulation circuit, and a second end connected to the second end of the second capacitor and serving as a second output end of the signal modulation circuit.
5. The signal transmission apparatus according to claim 2, further comprising:
the data buffer is electrically connected with the continuous sampling circuit and the average sampling circuit respectively; and
and the data comparison circuit is electrically connected with the data buffer.
6. The signal transmission apparatus according to claim 4, wherein the amplification circuit comprises:
a first resistor, a second resistor, a third resistor, a fourth resistor, a triode, a third capacitor, and a fourth capacitor, wherein,
a first end of the first resistor is connected with a first end of the second resistor; the second end of the first resistor is connected with the first end of the fourth resistor and connected with a power supply end; the second end of the fourth resistor is connected with the first end of the triode; the control end of the triode is respectively connected with the first end of the first resistor and the first end of the second resistor; the second end of the triode is connected with the first end of the third resistor and respectively connected with the first end of the second capacitor and the first end of the first variable capacitor; a second end of the third resistor is connected to a second end of the second resistor and to ground; a first end of the third capacitor is connected with a first end of the first resistor and a first end of the second resistor, respectively; a second end of the third capacitor is connected with a second end of the second resistor; a first end of the fourth capacitor is connected with a second end of the fourth resistor; a second terminal of the fourth capacitor is connected to a second terminal of the second capacitor.
7. The signal transmission apparatus according to claim 6,
the third capacitor and the fourth capacitor are coupling capacitors.
8. The signal transmission apparatus according to claim 1 or 2, wherein each of the signal demodulation circuits includes:
the resonance circuit is electrically connected with the corresponding signal modulation circuit; and
and the envelope detection circuit is electrically connected with the resonant loop circuit.
9. The signal transmission apparatus of claim 8, wherein the resonant tank circuit comprises:
the primary side of the transformer is connected with the output end of the signal modulation circuit; and
and the fifth capacitor is connected with the secondary side of the transformer in parallel.
10. The signal transmission apparatus of claim 9, wherein the envelope detection circuit comprises:
a single-phase conduction device;
a fifth resistor connected in parallel with the fifth capacitor through the single-phase turn-on device; and
a sixth capacitor connected in parallel with the fifth resistor.
11. An apparatus, comprising:
the signal transmission device of any one of claims 1 to 10.
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| CN202222036309.9U CN218162496U (en) | 2022-08-03 | 2022-08-03 | Signal transmission device and equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115277330A (en) * | 2022-08-03 | 2022-11-01 | 珠海格力电器股份有限公司 | Signal transmission device, method, apparatus and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115277330A (en) * | 2022-08-03 | 2022-11-01 | 珠海格力电器股份有限公司 | Signal transmission device, method, apparatus and storage medium |
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