CN215339996U - High-voltage signal linear conversion device - Google Patents
High-voltage signal linear conversion device Download PDFInfo
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- CN215339996U CN215339996U CN202023099369.2U CN202023099369U CN215339996U CN 215339996 U CN215339996 U CN 215339996U CN 202023099369 U CN202023099369 U CN 202023099369U CN 215339996 U CN215339996 U CN 215339996U
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Abstract
The utility model belongs to the field of aviation test, and particularly relates to a high-voltage signal linear conversion device which comprises a power circuit; a signal conversion circuit connected to the power supply circuit; the signal conversion circuit adopts a linear optocoupler to realize the isolation conversion of the high-voltage signal. The high-voltage signal linear conversion device provided by the utility model adopts two paths of signal conversion circuits, and adopts linear optical coupling isolation to jointly realize higher voltage conversion precision and higher linearity.
Description
Technical Field
The utility model belongs to the field of aviation tests, and particularly relates to a high-voltage signal linear conversion device.
Background
At present, in the field of testing (such as aviation test flight testing), the traditional measuring method and equipment have great defects in the aspects of reliability, safety and convenience, and in the conversion process, interference factors in signals are not thoroughly eliminated, so that the optimal performance in all aspects cannot be met at the same time.
Therefore, the design of the collecting and measuring equipment which is more convenient, more efficient and more reliable has very important significance and value for the measurement and monitoring management of the power supply system in various fields.
In order to solve the above problems, the present invention provides a high voltage signal linear conversion device.
SUMMERY OF THE UTILITY MODEL
The utility model provides a high-voltage signal linear conversion device for solving the technical defects in the prior art.
It is still another object of the present invention to provide a high voltage signal linear conversion apparatus, which employs linear optical coupling isolation to achieve higher voltage conversion precision and higher linearity.
To achieve these objects and other advantages and in accordance with the purpose of the utility model, there is provided a high voltage signal linear conversion apparatus comprising:
a power supply circuit;
a signal conversion circuit connected to the power supply circuit;
the signal conversion circuit adopts a linear optocoupler to realize the isolation conversion of the high-voltage signal.
Preferably, the power circuit includes a protection circuit, an EMI module circuit, and a DCDC circuit, wherein a power supply is input to an input terminal of the protection circuit, an output terminal of the protection circuit is connected to an input terminal of the EMI circuit, an output terminal of the EMI circuit is connected to an input terminal of the DCDC circuit, and an output terminal of the DCDC circuit is connected to the signal conversion circuit.
Preferably, the protection circuit includes a current-limiting protection circuit and an overvoltage protection circuit, a power supply is input to an input end of the current-limiting protection circuit, an output end of the current-limiting protection circuit is connected to an input end of the overvoltage protection circuit, and an output end of the overvoltage protection circuit is connected to an input end of the signal conversion circuit.
Preferably, the EMI module employs a PIM-1 type filtering module.
Preferably, the DCDC module circuit adopts a plurality of SUCSR52412C type power isolation modules which are connected in parallel.
Preferably, the signal conversion circuit includes a first signal conversion circuit and a second signal conversion circuit, and the first signal conversion circuit and the second signal conversion circuit are respectively connected to the power supply circuit;
the first signal conversion circuit and the second signal conversion circuit are mutually independent and isolated, and the two circuit structures are the same and supply power independently.
Preferably, the first signal conversion circuit comprises an input circuit, a linear optocoupler and an output circuit, wherein the input end of the input circuit is connected with the power circuit, the output end of the input circuit is connected with one end of the linear optocoupler, and the other end of the linear optocoupler is connected with the output circuit.
Preferably, the input circuit includes current-limiting resistance F1, attenuation resistance R1, R2 and R3, first amplifier, current-limiting resistance's input and power supply circuit are connected, current-limiting resistance's output with attenuation resistance's input is connected, attenuation resistance's output with first photodiode in the linear opto-coupler is connected, another way input high voltage signal of linear opto-coupler's input, linear opto-coupler's output pass through resistance R4 and resistance R5 with the input of first amplifier is connected, the output and the resistance R6 of first amplifier are connected.
Preferably, the output circuit includes attenuation resistors R9, R10 and R11, and a second amplifier, one end of a second photodiode of the linear optocoupler is connected to an input end of the attenuation resistor, the other end of the second photodiode is grounded, an input end of the attenuation resistor is connected to an input end of the second amplifier, and an output end of the attenuation resistor is connected to an output end of the second amplifier.
Preferably, the linear optical coupler is selected from any one of HCNR200/201, TIL300 and LOC 111.
The utility model has the advantages of
1. The high-voltage signal linear conversion device provided by the utility model adopts two signal conversion channels, so that the device can simultaneously adjust two high-voltage signals under the advantage of small volume, and is suitable for more application scenes.
2. The high-voltage signal linear conversion device provided by the utility model has the advantages that the voltage conversion precision is higher and the linearity is higher by adopting the linear optical coupling isolator.
Drawings
FIG. 1 is a schematic diagram of a power supply circuit according to the present invention;
FIG. 2 is a schematic diagram of a signal conversion circuit according to the present invention;
FIG. 3 is a schematic diagram of an input circuit according to the present invention;
FIG. 4 is a schematic diagram of an output circuit according to the present invention;
FIG. 5 is a schematic diagram of a protection circuit according to the present invention;
wherein, AR1 is the first amplifier, AR2 is the second amplifier, CAP is the electric capacity, PD1, PD2 are the inside photodiode of linear opto-coupler.
Detailed Description
The present invention will be described in further detail with reference to fig. 1, 2, 3, 4 and 5 so that those skilled in the art can practice the utility model with reference to the description.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
To achieve these objects and other advantages and in accordance with the purpose of the utility model, as embodied and broadly described herein, there is provided a high voltage signal linear conversion apparatus, as shown in fig. 1 and 2, comprising:
a power supply circuit;
a signal conversion circuit connected to the power supply circuit;
the signal conversion circuit adopts a linear optocoupler to realize the isolation conversion of the high-voltage signal.
The high-voltage signal linear conversion device provided by the utility model has the advantages that the voltage conversion precision is higher and the linearity is higher by adopting the linear optical coupling isolator.
In view of the above situation, in yet another embodiment, as shown in fig. 1, the power circuit includes a protection circuit, an EMI module circuit, and a DCDC circuit, wherein an input terminal of the protection circuit inputs a power source, an output terminal of the protection circuit is connected to an input terminal of the EMI circuit, an output terminal of the EMI circuit is connected to an input terminal of the DCDC circuit, and an output terminal of the DCDC circuit is connected to the signal conversion circuit.
Specifically, as shown in fig. 5, the protection circuit includes a current-limiting protection circuit and an overvoltage protection circuit, a power supply is input to an input terminal of the current-limiting protection circuit, an output terminal of the current-limiting protection circuit is connected to an input terminal of the overvoltage protection circuit, and an output terminal of the overvoltage protection circuit is connected to an input terminal of the EMI module circuit.
Specifically, the current-limiting protection circuit in the protection circuit comprises a fuse F1, and the overvoltage protection circuit comprises a voltage stabilizing diode D1.
Specifically, the EMI module adopts a PIM-1 type filtering module.
The filter module is adopted, and the filter module is provided with a two-stage filter circuit, so that the insertion loss is high, and the performance is excellent.
On the basis of the above embodiments, specifically, the DCDC module circuit adopts a plurality of SUCSR52412C type power isolation modules connected in parallel.
The power isolation modules are connected in parallel, so that the isolation effect between the power isolation modules is ensured while the multi-path 12V power supply requirement required by the high-voltage signal linear conversion device is obtained.
On the basis of the above embodiments, in yet another embodiment, as shown in fig. 2, the signal conversion circuit includes a first signal conversion circuit and a second signal conversion circuit, the first signal conversion circuit and the second signal conversion circuit have the same structure and are isolated from each other by supplying power separately, and signals do not interfere with each other.
The two circuits have the same structure and are independently powered, so that the high-voltage signal linear conversion device can simultaneously have two paths of high-voltage signal conversion capacity, and the first signal conversion circuit and the second signal conversion circuit are connected with the power circuit. The power supply circuit converts 28V into 12V after DCDC conversion and outputs the 12V to supply power to the signal conversion circuit, wherein one path of 12V is supplied to an input circuit of the first signal conversion circuit, one path of 12V is supplied to an input circuit of the second signal conversion circuit, and the other path of 12V is supplied to output circuits of the first signal conversion circuit and the second signal conversion circuit.
On the basis of the foregoing embodiment, specifically, as shown in fig. 3 and 4, the first signal conversion circuit includes an input circuit, a linear optical coupler, and an output circuit, and the input circuit and the output circuit are connected by the first linear optical coupler.
On the basis of the above-mentioned embodiment, it is specific, as shown in fig. 3, the input circuit includes current-limiting resistor F1, attenuation resistor R1, R2 and R3, first linear optocoupler, first amplifier, the input of current-limiting resistor with high-voltage signal input end connects, the output of current-limiting resistor with attenuation resistor's input is connected, attenuation resistor's output with the input of first linear optocoupler is connected all the way, another way of the input of first linear optocoupler with high-voltage signal input end is connected all the way, the output of first linear optocoupler pass through resistance R4 and resistance R5 with first amplifier is connected, the output of first amplifier is connected with R6.
On the basis of the foregoing embodiment, specifically, as shown in fig. 4, the output circuit includes a first linear optical coupler, attenuation resistors R9, R10, and R11, and a second amplifier, one end of the first linear optical coupler is connected to an input end of the attenuation resistor, the other end of the first linear optical coupler is grounded, an input end of the attenuation resistor is connected to an input end of the second amplifier, and an output end of the attenuation resistor is connected to an output end of the second amplifier.
The input circuit, the linear optical coupler and the output circuit in the second signal conversion circuit are the same as the input circuit, the linear optical coupler and the output circuit in the first signal conversion circuit, and redundant description is not provided.
Specifically, the linear optocoupler selects any one of HCNR200/201, TIL300 and LOC 111.
The utility model provides a high-voltage signal linear conversion device, which comprises a power circuit and a signal conversion circuit, wherein the power circuit is connected with the signal conversion circuit to supply power to the signal conversion circuit, and the working principle is as follows:
as shown in fig. 1, in the power circuit, a 28V operating power supply performs EMI filtering after current-limiting protection and overvoltage protection, and a PIM-1 type filtering module of the golden screw technology company is selected; after DCDC conversion is carried out through a SUCS1R 52412C type power isolation module of the firm consil, 28V is converted into 12V to be output, and power is supplied to the signal conversion circuit.
As shown in fig. 3 and 4, in the signal conversion circuit, an input high voltage signal is limited, attenuated, and limited, and then is sent to a linear optical coupler in the form of a driving current, such as HCNR200/201 of Agilent, TIL300 of TOAS of TI sub-company, LOC111 of CLARE, and the like. After a high-voltage signal enters the linear optical coupler, light output by an LED inside the optical coupler is converted into current by photodiodes (PD1 and PD2) inside the optical coupler, the current is converted into voltage by an external trans-impedance amplifier (AR2 and peripheral resistors R9, R10 and R11), and the attenuation from the high-voltage signal to a low-voltage signal is realized through the ratio adjustment of (R9+ R10+ R11)/(R1+ R2+ R3). Meanwhile, the nonlinearity of the feedback path counteracts the nonlinearity of the direct path through a peripheral feedback circuit added by the linear optocoupler, so that the linear isolation of two paths of high-voltage signals is realized.
While embodiments of the utility model have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the utility model pertains, and further modifications may readily be made by those skilled in the art, it being understood that the utility model is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (8)
1. A high voltage signal linear conversion device, comprising:
a power supply circuit;
the signal conversion circuit is connected with the power supply circuit and adopts a linear optical coupler to realize the isolation conversion of a high-voltage signal;
the signal conversion circuit comprises a first signal conversion circuit and a second signal conversion circuit, and the first signal conversion circuit and the second signal conversion circuit are respectively connected with the power circuit; the first signal conversion circuit and the second signal conversion circuit are mutually independent and isolated, and the two circuits have the same structure and are independently powered;
the first signal conversion circuit comprises an input circuit, a linear optocoupler and an output circuit, wherein the input end of the input circuit is connected with the power circuit, the output end of the input circuit is connected with one end of the linear optocoupler, and the other end of the linear optocoupler is connected with the output circuit.
2. The high-voltage signal linear conversion device according to claim 1, wherein the power circuit comprises a protection circuit, an EMI module circuit and a DCDC circuit, an input terminal of the protection circuit inputs a power source, an output terminal of the protection circuit is connected with an input terminal of the EMI circuit, an output terminal of the EMI circuit is connected with an input terminal of the DCDC circuit, and an output terminal of the DCDC circuit is connected with the signal conversion circuit.
3. The high-voltage signal linear conversion device according to claim 2, wherein the protection circuit comprises a current-limiting protection circuit and an overvoltage protection circuit, a power supply is input to an input end of the current-limiting protection circuit, an output end of the current-limiting protection circuit is connected with an input end of the overvoltage protection circuit, and an output end of the overvoltage protection circuit is connected with an input end of the signal conversion circuit.
4. The high voltage signal linear conversion device according to claim 2, wherein the EMI module employs a PIM-1 type filtering module.
5. The high voltage signal linear conversion device according to claim 2, wherein said DCDC circuit employs a plurality of SUCSR52412C type power isolation modules connected in parallel.
6. The high-voltage signal linear conversion device as claimed in claim 1, wherein the input circuit includes a current-limiting resistor F1, attenuation resistors R1, R2 and R3, and a first amplifier, an input terminal of the current-limiting resistor is connected to a power circuit, an output terminal of the current-limiting resistor is connected to an input terminal of the attenuation resistor, an output terminal of the attenuation resistor is connected to a first photodiode in the linear optical coupler, another one of the input terminals of the linear optical coupler inputs the high-voltage signal, an output terminal of the linear optical coupler is connected to an input terminal of the first amplifier through a resistor R4 and a resistor R5, and an output terminal of the first amplifier is connected to a resistor R6.
7. The high-voltage signal linear conversion device according to claim 1, wherein the output circuit comprises attenuation resistors R9, R10 and R11, and a second amplifier, one end of a second photodiode of the linear optical coupler is connected to an input end of the attenuation resistor, the other end of the second photodiode is grounded, an input end of the attenuation resistor is connected to an input end of the second amplifier, and an output end of the attenuation resistor is connected to an output end of the second amplifier.
8. The high-voltage signal linear conversion device according to claim 1, wherein the linear optical coupler selects any one of HCNR200/201, TIL300 and LOC 111.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023099369.2U CN215339996U (en) | 2020-12-21 | 2020-12-21 | High-voltage signal linear conversion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023099369.2U CN215339996U (en) | 2020-12-21 | 2020-12-21 | High-voltage signal linear conversion device |
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| Publication Number | Publication Date |
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| CN215339996U true CN215339996U (en) | 2021-12-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202023099369.2U Active CN215339996U (en) | 2020-12-21 | 2020-12-21 | High-voltage signal linear conversion device |
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| CN (1) | CN215339996U (en) |
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