CN216926940U - Oscillograph signal acquisition system - Google Patents
Oscillograph signal acquisition system Download PDFInfo
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- CN216926940U CN216926940U CN202123072116.0U CN202123072116U CN216926940U CN 216926940 U CN216926940 U CN 216926940U CN 202123072116 U CN202123072116 U CN 202123072116U CN 216926940 U CN216926940 U CN 216926940U
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Abstract
A oscillograph signal acquisition system comprising: the signal isolation compensation module is used for receiving a sampling signal from a control system and generating a first output signal and a second output signal which are identical to the sampling signal based on the sampling signal; the wave recorder module is used for receiving the first output signal, acquiring and displaying a wave recording signal in real time based on the first output signal; the control system is communicatively coupled to the signal isolation compensation module to receive the second output signal. The implementation of the oscillograph signal acquisition system of the utility model can not generate influence on the control system in the signal acquisition process, thereby ensuring the consistency before and after signal acquisition and really realizing the targets of undisturbed acquisition, stable system and high fidelity oscillograph.
Description
Technical Field
The utility model relates to the field of signal acquisition, in particular to a signal acquisition system of a wave recorder.
Background
At present, the automation degree of the high-speed rail and subway field in China is very high. Each subsystem of the vehicle, the line and the network has the application of an industrial control system, such as: a Supervisory Control And Data Acquisition (SCADA) System, a Fire Alarm System (IFAS), an Equipment Monitoring System (Equipment Monitoring And Control System), And so on. The system safety is guaranteed, and the operation of the direct relation industry is reliable and safe.
The oscillograph can collect specific signals of the control system in an online mode, record the protection action event quantity and the switch contact state information of the system in normal, abnormal and even fault situations so as to trace the reasons of the abnormal or fault situations afterwards, and perform analog calculation analysis and improve the hard software of the control system through a calculation tool if necessary to ensure the reliable and safe operation of the control.
The signal acquisition is a process for acquiring physical quantities (such as current, voltage and the like), and according to the law of conservation of energy, the acquisition tends to cause the change of the physical quantities of the signals, and such change can cause the deviation of an operation control curve of a control system, and has influence on stability or potential safety hazard. The traditional wave recorder directly detects the specific signal of the control system, which can affect the control system.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to a signal acquisition system for a wave recorder, which does not change the physical quantity of an acquired signal when the acquired signal is physically connected to the signal acquisition system, so that the normal operation and safety stability of the control system are not affected.
The technical scheme adopted by the utility model for solving the technical problems is as follows: a oscillograph signal acquisition system is constructed comprising:
the signal isolation compensation module is used for receiving a sampling signal from a control system and generating a first output signal and a second output signal which are identical to the sampling signal based on the sampling signal;
the wave recorder module is used for receiving the first output signal, acquiring and displaying a wave recording signal in real time based on the first output signal;
the control system is communicatively coupled to the signal isolation compensation module to receive the second output signal.
In the oscillograph signal acquisition system of the present invention, the signal isolation compensation module comprises:
the signal acquisition circuit is used for being in communication connection with the control system to receive the sampling signal;
a signal replication circuit for replicating the sampled signal to generate the first output signal and the second output signal;
a compensation circuit for calculating an error of the sampling signal with the first output signal and the second output signal and compensating the first output signal and the second output signal based on the error;
an isolation circuit for isolating the sampling signal, the first output signal and the second output signal;
an output circuit for returning the second output signal to the control system;
the signal acquisition circuit is in communication connection with the control system and the signal copying circuit, the compensation circuit is in communication connection with the signal acquisition circuit, the signal copying circuit and the isolation circuit, and the isolation circuit is in communication connection with the output circuit and the wave recorder module.
In the wave recorder signal acquisition system of the present invention, the wave recorder module includes:
the data acquisition unit is used for receiving the first output signal and acquiring the wave recording signal based on the first output signal;
the memory is used for storing the wave recording signals;
the waveform playback display is used for displaying the wave recording signals;
and the data control processor is used for processing the recording signals and controlling the waveform playback display to realize the recording signals in real time and controlling the memory to store the recording signals.
In the oscillograph signal acquisition system of the present invention, the data control processor includes a CPU and a DSP.
The oscillograph signal acquisition system further comprises a data transmission interface for transmitting the oscillograph signal to an external system.
The implementation of the oscillograph signal acquisition system of the utility model can not generate influence on the control system in the signal acquisition process, thereby ensuring the consistency before and after signal acquisition and really realizing the targets of undisturbed acquisition, stable system and high fidelity oscillograph.
Drawings
The utility model will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a signal flow diagram of a prior art control system;
fig. 2 is a schematic structural diagram of a first preferred embodiment of the oscillograph signal acquisition system of the present invention;
fig. 3 is a schematic structural diagram of a second preferred embodiment of the signal acquisition system of the wave recorder of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
Fig. 1 is a signal flow diagram of a prior art control system. As shown in fig. 1, inside the control system 300, a signal S1 is transmitted from an arbitrary cell Cn to another arbitrary cell Cn + 1. The signal S1 may be a digital signal, an analog signal, or a network signal. The purpose of the signal acquisition system of the wave recorder is to effectively acquire the signal S1 (namely a sampling signal) and avoid the influence on the control system 300 in the signal acquisition process, thereby ensuring the consistency before and after signal acquisition (time domain and frequency domain physical quantities) and really achieving the aims of undisturbed acquisition, stable system and high-fidelity wave recording.
Fig. 2 is a schematic structural diagram of the signal acquisition system of the wave recorder of the present invention. As shown in fig. 2, the signal acquisition system of the wave recorder of the present invention includes: a signal isolation compensation module 100 and a wave recorder module 200. As shown in fig. 2, inside the control system 300, the sampling signal S1 is transmitted from an arbitrary cell Cn to another arbitrary cell Cn + 1. The signal isolation compensation module 100 is communicatively coupled to the control system 300 to receive the sampled signal S1 and generate a first output signal S3 and a second output signal S2 identical to the sampled signal S1 based on the sampled signal S1. The control system 300 is communicatively coupled to the signal isolation compensation module to receive the second output signal S2. The recorder module 200 is configured to receive the first output signal S3 and collect and display a recording signal in real time based on the first output signal S3.
The sampling signal S1 transmitted from one arbitrary cell Cn to another arbitrary cell Cn +1 generates two paths of the first output signal S3 and the second output signal S2 which are isolated from each other and identical to the sampling signal S1 after the input signal isolation compensation module 100, and the first output signal S3 is transmitted to the recorder module 200, and the second output signal S2 is returned to the control system 300 and transmitted to the arbitrary cell Cn +1, so that it can be ensured that the first output signal S3, the second output signal S2 and the sampling signal S1 are consistent, the first output signal S3 and the sampling signal S1 are consistent to ensure the realization of the recording and playing back of the recorder module, and the second output signal S2 and the sampling signal S1 are consistent to ensure the stable operation of the control system 300.
Therefore, the wave recorder signal acquisition system can not influence the control system in the signal acquisition process, thereby ensuring the consistency before and after signal acquisition (time domain and frequency domain physical quantities), and really realizing the targets of undisturbed acquisition, stable system and high fidelity wave recording.
Fig. 3 is a schematic structural diagram of a second preferred embodiment of the oscillograph signal acquisition system of the present invention. As shown in fig. 3, the signal acquisition system of the wave recorder of the present invention includes: a signal isolation compensation module 100 and a wave recorder module 200. The signal isolation compensation module 100 further includes a signal acquisition circuit 110, a signal replication circuit 120, a compensation circuit 130, an isolation circuit 140, and an output circuit 150. As shown in fig. 3, inside the control system 300, the sampling signal S1 is transmitted from an arbitrary cell Cn to another arbitrary cell Cn + 1. The signal acquisition circuit 110 is communicatively coupled to the control system 300 to receive a sampled signal S1 transmitted from an arbitrary cell Cn to another arbitrary cell Cn + 1. The signal replication circuit 120 is communicatively coupled to the signal acquisition circuit 110 to receive and replicate the sampled signal S1 to generate the first output signal S3 and the second output signal S2. The compensation circuit 130 is communicatively coupled to the signal replication circuit 120 and the signal acquisition circuit 110 to receive the first output signal S32, the second output signal S2, and the sampled signal S1 for calculating an error of the sampled signal S1 with the first output signal S3 and the second output signal S2, and compensating the first output signal S3 and the second output signal S2 based on the error. The isolation circuit 140 is electrically connected to the compensation circuit 130, the output circuit and the wave recorder module for isolating the sampling signal S1, the first output signal S3 and the second output signal S2. The output circuit 150 electrically connects the control system 300 and the isolation circuit 140 to receive the second output signal S2 and return the second output signal S2 to the control system and to any cell Cn + 1. The recorder module 200 is also electrically connected to the isolation circuit 140 to receive the first output signal S1 for collecting and displaying a recording signal in real time based on the first output signal S3.
In a preferred embodiment of the present invention, the signal acquisition circuit 110 may select a suitable current sampling circuit or voltage sampling circuit, such as a sampling circuit formed by voltage dividing resistors, according to the physical type (e.g., current, voltage) of the sampling signal. The signal replication circuit 120 may be constructed by selecting an appropriate current mirror, voltage mirror circuit, or the like according to the physical type (e.g., current, voltage) of the sampled signal. The compensation circuit 130 may employ any suitable current or voltage compensation chip, such as ME2169, SM2396EK, ME2170, etc., which will not be described in detail herein. The isolation circuit 140 preferably employs an optical coupling isolation circuit. The output circuit 150 may employ any suitable RC output circuit.
In a preferred embodiment of the present invention, the recorder module 200 can be constructed using any suitable known recorder. In the preferred embodiment, the wave recorder module 200 includes: data collector 210, memory 220, waveform playback display 230, data control processor 240. The data collector 210 is configured to receive the first output signal and collect the recording signal based on the first output signal. The memory 220 is used for storing the recording signal. The waveform playback display 230 is used for displaying the recording signal, and may be a display screen. The data control processor 240 is configured to process the recording signal and control the waveform playback display to implement the recording signal in real time and control the memory to store the recording signal. The data control processor 240 preferably includes a CPU and a DSP, and the recording signal stored in the memory 220 in real time can be displayed in real time by the waveform playback display 230 under the cooperative control of the CPU and the DSP. In a further preferred embodiment of the present invention, the wave recorder module 200 may further include a data transmission interface for simultaneously transmitting the wave recording signal to an external system for subsequent analysis and processing under the cooperative control of the CPU and the DSP.
In the preferred embodiment, the sampling signal S1 enters the signal isolation compensation module 100, goes through the signal replication circuit 120, the compensation circuit 130 and the isolation circuit 140, and then outputs the first output signal S3 and the second output signal S2, respectively. The second output signal S2 is transmitted to the other arbitrary cell Cn +1 to ensure that the link of the control system 300 is complete and working properly. The first output signal S3 is transmitted to the data collector 210, and the signal collection of the first output signal S3 is completed. The data acquisition unit 210 outputs the first output signal S3 to the data control processor 240 formed by the CPU and the DSP for data processing and control coordination, and then outputs the first output signal S3 to the memory 220 for data storage, the waveform playback display 230 for real-time waveform display, and the data transmission interface for data analysis and processing, thereby implementing the function of the recorder.
The implementation of the oscillograph signal acquisition system of the utility model can not generate influence on the control system in the signal acquisition process, thereby ensuring the consistency before and after signal acquisition and really realizing the targets of undisturbed acquisition, stable system and high fidelity oscillograph.
While the utility model has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the utility model. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the utility model without departing from its scope. Therefore, it is intended that the utility model not be limited to the particular embodiment disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (5)
1. A oscillograph signal acquisition system, comprising:
the signal isolation compensation module is used for receiving a sampling signal from a control system and generating a first output signal and a second output signal which are identical to the sampling signal based on the sampling signal;
the wave recorder module is used for receiving the first output signal, collecting and displaying a wave recording signal in real time based on the first output signal;
the control system is communicatively coupled to the signal isolation compensation module to receive the second output signal.
2. The oscillograph signal acquisition system of claim 1 wherein the signal isolation compensation module comprises:
the signal acquisition circuit is used for being in communication connection with the control system to receive the sampling signal;
a signal replication circuit for replicating the sampled signal to generate the first output signal and the second output signal;
a compensation circuit for calculating an error of the sampling signal with the first output signal and the second output signal and compensating the first output signal and the second output signal based on the error;
an isolation circuit for isolating the sampling signal, the first output signal and the second output signal;
an output circuit for returning the second output signal to the control system;
the signal acquisition circuit is in communication connection with the control system and the signal copying circuit, the compensation circuit is in communication connection with the signal acquisition circuit, the signal copying circuit and the isolation circuit, and the isolation circuit is in communication connection with the output circuit and the wave recorder module.
3. The oscillograph signal acquisition system of claim 2 wherein the oscillograph module includes:
the data acquisition unit is used for receiving the first output signal and acquiring the wave recording signal based on the first output signal;
the memory is used for storing the wave recording signals;
the waveform playback display is used for displaying the recording signal;
and the data control processor is used for processing the wave recording signals and controlling the waveform playback display to realize the wave recording signals in real time and controlling the memory to store the wave recording signals.
4. The oscillograph signal acquisition system according to claim 3, wherein the data control processor includes a CPU and a DSP.
5. The oscillograph signal acquisition system according to claim 3, further comprising a data transmission interface for transmitting the recording signal to an external system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123072116.0U CN216926940U (en) | 2021-12-08 | 2021-12-08 | Oscillograph signal acquisition system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123072116.0U CN216926940U (en) | 2021-12-08 | 2021-12-08 | Oscillograph signal acquisition system |
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| CN216926940U true CN216926940U (en) | 2022-07-08 |
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| CN202123072116.0U Active CN216926940U (en) | 2021-12-08 | 2021-12-08 | Oscillograph signal acquisition system |
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