CN219842484U - Ultralow frequency voltage signal testing system - Google Patents
Ultralow frequency voltage signal testing system Download PDFInfo
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- CN219842484U CN219842484U CN202321215937.1U CN202321215937U CN219842484U CN 219842484 U CN219842484 U CN 219842484U CN 202321215937 U CN202321215937 U CN 202321215937U CN 219842484 U CN219842484 U CN 219842484U
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- 238000012360 testing method Methods 0.000 title claims abstract description 79
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- 238000005516 engineering process Methods 0.000 abstract description 4
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- 230000009897 systematic effect Effects 0.000 description 3
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Abstract
The utility model discloses an ultralow frequency voltage signal testing system in the technical field of submarine cable testing, which comprises an upper computer, a frequency modulation and amplitude modulation signal unit, a voltage amplifier, a test article tool and an acquisition unit which are electrically connected in sequence; the frequency modulation and amplitude modulation signal unit comprises an MCU chip and a DAC chip and is used for outputting an output signal of 0.001 Hz-1 kHz according to a control instruction of the upper computer; the voltage amplifier is used for converting an output signal into a high-voltage signal and loading the high-voltage signal onto a test sample on the test sample tool, and the acquisition unit is used for acquiring a voltage signal and a current signal of the test sample and transmitting the acquired signals to the upper computer; the upper computer is used for sending a control instruction to the frequency modulation and amplitude modulation signal unit and receiving the acquisition signal sent by the acquisition unit. The test system can output ultra-low frequency signals by adopting the frequency modulation and amplitude modulation signal unit circuit technology, thereby meeting the test requirement on submarine cables.
Description
Technical Field
The utility model relates to the technical field of submarine cable testing, in particular to an ultralow frequency voltage signal testing system.
Background
Along with the rapid development of the power equipment, the production capacity of the power equipment is increased, the corresponding production efficiency is improved continuously, and the test requirement and efficiency of the submarine cable are improved correspondingly.
The performance test of the submarine cable is dependent on the voltage test system, the voltage test system needs to output voltage signals with corresponding frequencies according to frequency values set by users, and the traditional voltage test system is difficult to output voltage signals with ultra-low frequencies, so that the test requirement of the submarine cable cannot be met.
Disclosure of Invention
The utility model solves the problem that the traditional voltage test system in the prior art is difficult to output the ultralow frequency voltage signal by providing the ultralow frequency voltage signal test system.
The embodiment of the utility model provides an ultralow frequency voltage signal testing system which comprises an upper computer, a frequency modulation and amplitude modulation signal unit, a voltage amplifier, a test article tool and a collecting unit which are electrically connected in sequence;
the frequency modulation and amplitude modulation signal unit comprises an MCU chip and a DAC chip, and is used for outputting an output signal of 0.001 Hz-1 kHz according to a control instruction of the upper computer;
the voltage amplifier is used for converting the output signal into a high-voltage signal to be loaded on a test sample on the test sample tool,
the acquisition unit is used for acquiring voltage signals and current signals of the test sample and sending the acquired signals to the upper computer;
the upper computer is used for sending the control instruction to the frequency modulation and amplitude modulation signal unit and receiving the acquisition signal sent by the acquisition unit.
The beneficial effects of the above embodiment are that: the MCU chip is responsible for generating sine wave small signals with the zero potential higher than 0.001 Hz-100 Hz, the DAC chip is responsible for generating sine wave small signals with the zero potential higher than 100 Hz-1 kHz, and the system automatically selects the two signal sources as input signals according to the signal frequency set by a user. By adopting the frequency modulation and amplitude modulation signal unit circuit technology, signals with frequency modulation of 0.001 Hz-1 kHz can be obtained, ultra-low frequency signals can be output, and the test requirement on sea cables is met; the upper computer is also used for automatically calculating and analyzing the characteristics of the test sample according to the acquired signals, so that the test efficiency is improved.
On the basis of the above embodiments, the present utility model can be further improved, and specifically, the following steps are provided:
in one embodiment of the present utility model, the fm-am signal unit includes a signal source selecting module, an attenuating module, a biasing module and an amplifying module electrically connected in sequence, where the signal source selecting module includes the MCU chip and the DAC chip, the MCU chip and the DAC chip are connected to the attenuating module through a switch, the signal source selecting module is configured to output a sine wave small signal according to the control instruction, the attenuating module is configured to transform an amplitude of the sine wave small signal, the biasing module is configured to convert the sine wave small signal into a standard sine wave signal with 0V as a center point, and the amplifying module is configured to adjust the sine wave signal into the output signal with a target amplitude. According to the frequency value set by the user, the system automatically adjusts and outputs the voltage signal with corresponding frequency, the signal frequency is stable, the voltage is accurate, meanwhile, the voltage amplitude is changed by the system attenuation module, the bias module and the amplifying module, and the adjusting precision is finer.
In one embodiment of the utility model, the acquisition unit comprises a voltage divider, a voltage signal acquisition unit, a current signal acquisition unit and an 8-channel AD unit, wherein the voltage divider is connected in parallel with the test article fixture, the voltage signal acquisition unit acquires the voltage signal of the test article through the voltage divider, the current signal acquisition unit acquires the current signal of the test article, and the voltage signal and the current signal are both sent to the upper computer through the 8-channel AD unit.
In one embodiment of the present utility model, the test system further includes a correction unit, where the correction unit is configured to provide a correction loop, and the upper computer calculates a system error value according to a voltage signal and a current signal on the correction loop, and stores and compensates the system error value into a data result of a later actual test. The system comprises a correction unit, and the system error value obtained by the correction unit is used for eliminating the system error in the analysis of the actual test result, so that the final test result is more accurate.
In one embodiment of the present utility model, the voltage divider is an RC voltage divider.
In one embodiment of the utility model, the test system further comprises an auxiliary power supply. The auxiliary power supply is used for supplying power to each unit and module in the test system.
One or more technical solutions provided in the embodiments of the present utility model at least have the following technical effects or advantages:
1. the test system can obtain signals with frequency modulation of 0.001 Hz-1 kHz by adopting a frequency modulation and amplitude modulation signal unit circuit technology, can output ultralow frequency signals, and meets the test requirement of submarine cables;
2. the upper computer in the test system is also used for automatically calculating and analyzing the characteristics of the test sample according to the acquired signals, so that the test efficiency is improved;
3. the test system comprises a detection system error detection functional module (correction unit), and the system error value obtained by the correction unit eliminates the system error in the analysis of the actual test result, so that the final test result is more accurate.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. Like elements or portions are generally identified by like reference numerals throughout the several figures. In the drawings, elements or portions thereof are not necessarily drawn to scale.
FIG. 1 is a schematic block diagram of an ultra-low frequency voltage signal testing system;
fig. 2 is a schematic circuit diagram of an fm signal unit.
Detailed Description
The present utility model is further illustrated below in conjunction with the specific embodiments, it being understood that these embodiments are meant to be illustrative of the utility model only and not limiting the scope of the utility model, and that modifications of the utility model, which are equivalent to those skilled in the art to which the utility model pertains, will fall within the scope of the utility model as defined in the appended claims.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
In the description of the present utility model, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the various embodiments or examples of the utility model described and the features of the various embodiments or examples may be combined and combined by those skilled in the art without contradiction.
The embodiment of the utility model solves the problem that the traditional voltage testing system in the prior art is difficult to output the ultralow frequency voltage signal by providing the ultralow frequency voltage signal testing system.
The technical scheme in the embodiment of the utility model aims to solve the problems, and the overall thought is as follows:
examples:
as shown in FIG. 1, the ultra-low frequency voltage signal testing system comprises an upper computer, a frequency modulation and amplitude modulation signal unit, a voltage amplifier, a test article tool and an acquisition unit which are electrically connected in sequence.
As shown in FIG. 2, the FM AM signal unit comprises a signal source selection module, an attenuation module, a bias module and an amplifying module which are electrically connected in sequence, wherein the signal source selection module comprises an MCU chip and a DAC chip, the MCU chip and the DAC chip are connected with the attenuation module through one switch, the MCU chip is responsible for generating sine wave small signals above zero potential of 0.001 Hz-100 Hz, the DAC chip is responsible for generating sine wave small signals above zero potential of 100 Hz-1 kHz, the signal source selection module is used for automatically selecting the two signal sources to output the sine wave small signals according to a control instruction, the attenuation module is used for converting the amplitude of the sine wave small signals, the bias module is used for converting the sine wave small signals into standard sine wave signals taking 0V as a center point, and the amplifying module is used for adjusting the sine wave signals into output signals with target amplitude.
The voltage amplifier is used for converting the output signal into a high-voltage signal and loading the high-voltage signal on a test sample mounted on the test sample tool.
The acquisition unit comprises a voltage divider, a voltage signal acquisition unit, a current signal acquisition unit and an 8-channel AD unit, wherein the voltage divider is connected in parallel with the test article tool, the voltage signal acquisition unit acquires a voltage signal of a test article through the voltage divider, the current signal acquisition unit acquires a current signal of the test article, and the voltage signal and the current signal are acquisition signals and are all transmitted to the upper computer through the 8-channel AD unit.
The upper computer is used for sending a control instruction to the frequency modulation and amplitude modulation signal unit, receiving the acquisition signal sent by the acquisition unit, and automatically calculating and analyzing the characteristics of the test sample according to the acquisition signal.
Further, the test system also includes an auxiliary power supply. The auxiliary power supply is used for supplying power to each unit and module in the test system.
Optionally, the test system further includes a correction unit, the correction unit is used for providing a correction loop, the upper computer calculates a system error value according to the voltage signal and the current signal on the correction loop, and stores and compensates the system error value into a data result of a later actual test. The correction loop is a pure resistor loop, and in theory, the voltage and the current passing through the pure resistor loop have no phase difference, but the last acquired voltage and current signals have phase difference (systematic error) due to the acquisition reasons of the acquisition board, the systematic error and the like, so the correction unit is used for providing a test loop for measuring the systematic error.
Optionally, the voltage divider is an RC voltage divider.
The technical scheme provided by the embodiment of the utility model at least has the following technical effects or advantages:
1. the test system can obtain signals with frequency modulation of 0.001 Hz-1 kHz by adopting a frequency modulation and amplitude modulation signal unit circuit technology, can output ultralow frequency signals, and meets the test requirement of submarine cables;
2. the upper computer in the test system is also used for automatically calculating and analyzing the characteristics of the test sample according to the acquired signals, so that the test efficiency is improved;
3. the test system comprises a detection system error detection functional module (correction unit), and the system error value obtained by the correction unit eliminates the system error in the analysis of the actual test result, so that the final test result is more accurate.
While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.
Claims (6)
1. The ultralow frequency voltage signal testing system is characterized by comprising an upper computer, a frequency modulation and amplitude modulation signal unit, a voltage amplifier, a test article tool and an acquisition unit which are electrically connected in sequence;
the frequency modulation and amplitude modulation signal unit comprises an MCU chip and a DAC chip, and is used for outputting an output signal of 0.001 Hz-1 kHz according to a control instruction of the upper computer;
the voltage amplifier is used for converting the output signal into a high-voltage signal and loading the high-voltage signal onto a test sample on the test sample tool;
the acquisition unit is used for acquiring voltage signals and current signals of the test sample and sending the acquired signals to the upper computer;
the upper computer is used for sending the control instruction to the frequency modulation and amplitude modulation signal unit and receiving the acquisition signal sent by the acquisition unit.
2. The ultra-low frequency voltage signal testing system according to claim 1, wherein: the frequency modulation and amplitude modulation signal unit comprises a signal source selection module, an attenuation module, a bias module and an amplification module which are electrically connected in sequence, wherein the signal source selection module comprises an MCU chip and a DAC chip, the MCU chip and the DAC chip are connected with the attenuation module through one switch, the signal source selection module is used for outputting sine wave small signals according to control instructions, the attenuation module is used for converting the amplitude of the sine wave small signals, the bias module is used for converting the sine wave small signals into standard sine wave signals taking 0V as a center point, and the amplification module is used for adjusting the sine wave signals into output signals with target amplitude.
3. The ultra-low frequency voltage signal testing system according to claim 2, wherein: the acquisition unit comprises a voltage divider, a voltage signal acquisition unit, a current signal acquisition unit and an 8-channel AD unit, wherein the voltage divider is connected in parallel with the test article tool, the voltage signal acquisition unit acquires the voltage signal of the test article through the voltage divider, the current signal acquisition unit acquires the current signal of the test article, and the voltage signal and the current signal are both sent to the upper computer through the 8-channel AD unit.
4. The ultra-low frequency voltage signal testing system according to claim 3, wherein: the system comprises a host computer, a correction unit and a control unit, wherein the correction unit is used for providing a correction loop, and the host computer calculates a system error value according to a voltage signal and a current signal on the correction loop.
5. The ultra-low frequency voltage signal testing system according to claim 3, wherein: the voltage divider is an RC voltage divider.
6. The ultra-low frequency voltage signal testing system according to claim 1, wherein: the test system also includes an auxiliary power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321215937.1U CN219842484U (en) | 2023-05-19 | 2023-05-19 | Ultralow frequency voltage signal testing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321215937.1U CN219842484U (en) | 2023-05-19 | 2023-05-19 | Ultralow frequency voltage signal testing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219842484U true CN219842484U (en) | 2023-10-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321215937.1U Active CN219842484U (en) | 2023-05-19 | 2023-05-19 | Ultralow frequency voltage signal testing system |
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| CN (1) | CN219842484U (en) |
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2023
- 2023-05-19 CN CN202321215937.1U patent/CN219842484U/en active Active
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