CN220626617U - Power supply test load board card - Google Patents
Power supply test load board card Download PDFInfo
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- CN220626617U CN220626617U CN202322056426.6U CN202322056426U CN220626617U CN 220626617 U CN220626617 U CN 220626617U CN 202322056426 U CN202322056426 U CN 202322056426U CN 220626617 U CN220626617 U CN 220626617U
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Abstract
The utility model discloses a power supply test load board card, which comprises: the device comprises a microprocessor, a first current control circuit, a second current control circuit, a first protection circuit, a second protection circuit, a positive voltage constant current circuit and a negative voltage constant current circuit; the microprocessor is connected with the positive-voltage constant-current circuit through the first current control circuit, and the positive-voltage constant-current circuit is connected with the microprocessor through the first protection circuit; the microprocessor is connected with the negative-voltage constant-current circuit through a second current control circuit, and the negative-voltage constant-current circuit is connected with the microprocessor through a second protection circuit; the microprocessor and the positive pressure constant current circuit are used for connecting positive pressure input signals, and the microprocessor and the negative pressure constant current circuit are used for connecting negative pressure input signals. The power supply test load board card in the embodiment of the application provides flexible test conditions for the power supply to be tested with positive and negative voltages, and can ensure the safety of operators, test equipment and the power supply to be tested. The utility model can be widely applied to the technical field of power supply test.
Description
Technical Field
The utility model relates to the technical field of power supply testing, in particular to a power supply testing load board card.
Background
With the continuous development and popularization of modern electronic technology, the requirements of avionics systems for flying devices are increasing. The power supply is used as an important component of the heart level of the avionics system, is a primary premise for ensuring the safe and stable operation of the flying equipment, and has increasingly strict test requirements.
In the related art, as the power, the voltage and the current output by the power supply are diversified, if the traditional resistor array test is used, various resistors with different powers and different resistance values are needed for measurement, the operation is very troublesome and inconvenient; moreover, the traditional resistor has low flexibility as a load, can test the single corresponding power supply, occupies large space and has almost no adjustable function.
In view of the above, there is a need to solve the technical problems in the prior art.
Disclosure of Invention
The present utility model aims to solve at least one of the technical problems existing in the related art to a certain extent.
Therefore, an objective of the embodiments of the present utility model is to provide a power supply test load board card, which has a wide application range, a high integration level, a small volume, a wide adjustable range, a high stepping precision, a power supply capable of measuring positive and negative voltages, and a perfect protection mechanism.
In order to achieve the technical purpose, the technical scheme adopted by the embodiment of the utility model comprises the following steps:
the embodiment of the utility model provides a power supply test load board card, which comprises the following components:
the device comprises a microprocessor, a first current control circuit, a second current control circuit, a first protection circuit, a second protection circuit, a positive voltage constant current circuit and a negative voltage constant current circuit;
the microprocessor is connected with the positive-voltage constant-current circuit through the first current control circuit, and the positive-voltage constant-current circuit is connected with the microprocessor through the first protection circuit; the microprocessor is connected with the negative-voltage constant-current circuit through the second current control circuit, and the negative-voltage constant-current circuit is connected with the microprocessor through the second protection circuit;
the microprocessor and the positive pressure constant current circuit are used for being connected with positive pressure input signals, and the microprocessor and the negative pressure constant current circuit are used for being connected with negative pressure input signals.
In addition, the power test load board card according to the above embodiment of the present utility model may further have the following additional technical features:
further, in one embodiment of the present utility model, the power test load board card further includes a first front-end protection circuit and a second front-end protection circuit;
the microprocessor and the positive-pressure constant-current circuit are connected with positive-pressure input signals through the first front-end protection circuit, and the microprocessor and the negative-pressure constant-current circuit are connected with negative-pressure input signals through the second front-end protection circuit.
Further, in one embodiment of the present utility model, the first protection circuit includes a latch protection state circuit, an over-power protection circuit, an over-current protection circuit, and an over-voltage protection circuit.
Further, in one embodiment of the present utility model, the first front-end protection circuit includes a fuse circuit, a buffer start circuit, and an input detection circuit.
Further, in one embodiment of the utility model, the microprocessor comprises any one of the MCU, FPGA, CPLD, DSP, ARM chips.
Further, in one embodiment of the utility model, the microprocessor comprises an ATmega1284P chip.
Further, in one embodiment of the present utility model, the power test load board further includes a temperature detection circuit and a temperature protection circuit, the temperature detection circuit being connected to the microprocessor through the temperature protection circuit.
The advantages and benefits of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.
The embodiment of the application discloses a power test load board card, which comprises: the device comprises a microprocessor, a first current control circuit, a second current control circuit, a first protection circuit, a second protection circuit, a positive voltage constant current circuit and a negative voltage constant current circuit; the microprocessor is connected with the positive-voltage constant-current circuit through the first current control circuit, and the positive-voltage constant-current circuit is connected with the microprocessor through the first protection circuit; the microprocessor is connected with the negative-voltage constant-current circuit through the second current control circuit, and the negative-voltage constant-current circuit is connected with the microprocessor through the second protection circuit; the microprocessor and the positive pressure constant current circuit are used for being connected with positive pressure input signals, and the microprocessor and the negative pressure constant current circuit are used for being connected with negative pressure input signals. According to the power supply test load board card, the constant current circuit can be precisely controlled through the microcontroller matched with the current control circuit, and hardware support is provided for high precision and stepping precision. The power supply test load board card can realize the input of positive and negative voltages, provides flexible test conditions for a power supply to be tested with positive and negative voltages, and ensures the safety of operators, test equipment and the power supply to be tested by various protection circuits.
Drawings
FIG. 1 is a schematic diagram of a power test load board card according to the present utility model;
fig. 2 is a schematic diagram of an application scenario of a power test load board card provided by the utility model;
FIG. 3 is a schematic diagram of a microprocessor of a power test load board according to the present utility model;
fig. 4 is a schematic circuit diagram of a first front-end protection circuit of a power test load board card according to the present utility model;
fig. 5 is a circuit schematic diagram of a first protection circuit of a power test load board card according to the present utility model.
Detailed Description
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.
In the description of the present utility model, it should be understood that the terms "length," "upper," "lower," "front," "rear," "left," "right," "top," "inner," "outer," "axial," "radial," "circumferential," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and simplify description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the present utility model. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present utility model, it should be noted that, unless explicitly stated 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.
With the continuous development and popularization of modern electronic technology, the requirements of avionics systems for flying devices are increasing. The power supply is used as an important component of the heart level of the avionics system, is a primary premise for ensuring the safe and stable operation of the flying equipment, and has increasingly strict test requirements.
In the related art, as the power, the voltage and the current output by the power supply are diversified, if the traditional resistor array test is used, various resistors with different powers and different resistance values are needed for measurement, the operation is very troublesome and inconvenient; moreover, the traditional resistor has low flexibility as a load, can test the single corresponding power supply, occupies large space and has almost no adjustable function.
Currently, there is no modularized high-power load board card on the market, which causes difficulty in testing the load carrying capacity of the power supply. In view of this, this application is aimed at reducing the volume of power measuring equipment, provides a wide application scope, integrated level height, small, adjustable wide range, step-by-step precision height, measurable positive negative voltage power and have perfect protection mechanism's high-power program control load integrated circuit board.
Specifically, referring to fig. 1, the power test load board in the embodiment of the present application includes:
a microprocessor 13, a first current control circuit 3, a second current control circuit 9, a first protection circuit 5, a second protection circuit 10, a positive voltage constant current circuit 4 and a negative voltage constant current circuit 8;
the microprocessor 13 is connected with the positive voltage constant current circuit 4 through the first current control circuit 3, and the positive voltage constant current circuit 4 is connected with the microprocessor 13 through the first protection circuit 5; the microprocessor 13 is connected with the negative-pressure constant-current circuit 8 through the second current control circuit 9, and the negative-pressure constant-current circuit 8 is connected with the microprocessor 13 through the second protection circuit 10;
the microprocessor 13 and the positive pressure constant current circuit 4 are used for connecting the positive pressure input signal 1, and the microprocessor 13 and the negative pressure constant current circuit 8 are used for connecting the negative pressure input signal 12.
In some embodiments, the power test load board card further comprises a first front-end protection circuit 2 and a second front-end protection circuit 11;
the microprocessor 13 and the positive voltage constant current circuit 4 are connected with the positive voltage input signal 1 through the first front end protection circuit 2, and the microprocessor 13 and the negative voltage constant current circuit 8 are connected with the negative voltage input signal 12 through the second front end protection circuit 11.
In some embodiments, the power test load board card further comprises a temperature detection circuit 6 and a temperature protection circuit 7, wherein the temperature detection circuit 6 is connected to the microprocessor 13 through the temperature protection circuit 7.
In the embodiment of the application, a power supply test load board card is provided, and the board card can be used for realizing the test of power supply equipment. Specifically, referring to fig. 2, fig. 2 shows an application scenario of the power test load board provided in the embodiment of the present application, where the application scenario includes a computer, the power test load board (including a microprocessor 13 and a controllable high-power load), and a power supply to be tested. The computer is used as a man-machine interaction component, and a corresponding operating system and software can be installed. When the user uses the power supply to test the load board card, the power supply to be tested can be connected into the power supply to test the load board card, and then corresponding signals are issued in the computer by operation, so that the data such as the voltage value, the running current value, the temperature of the current board card and the like output by the current power supply to be tested are obtained. Here, the processor in the computer and the power test load board may communicate over the RS485 bus. The microprocessor 13 may receive corresponding instructions to adjust the operating state of the controllable high power load. Through this application embodiment, operating personnel can reduce the work load of changing the load, also conveniently monitor the state of power to be measured.
Specifically, in the embodiments of the present application, each component of the power test load board card is described in detail below.
In the embodiment of the present application, the microprocessor 13 of the power test load board card may be formed by any one or more processor chips including an MCU single-chip microcomputer, a PLC (programmable logic controller), FPGA, CPLD, DSP, ARM, and the like. For example, referring to fig. 3, fig. 3 shows a schematic circuit diagram of a microprocessor 13 provided in an embodiment of the present application, where the microprocessor 13 in fig. 3 may be configured with an ATmega1284P chip. Of course, the specific chip selection may be flexibly adjusted according to the needs, which is not limited in the embodiment of the present application.
In this embodiment of the present application, the positive voltage input signal 1 is an input port of a positive power supply to be tested, the negative voltage input signal 12 is an input port of a negative power supply to be tested, the first front end protection circuit 2 and the second front end protection circuit 11 are used for providing a slow start function and a voltage detection function, specifically, referring to fig. 4, fig. 4 shows a schematic diagram of a front end protection circuit, and the circuit may be composed of a fuse circuit, a buffer start circuit and an input detection circuit. The first current control circuit 3 is used for controlling the constant current value of the positive voltage constant current circuit 4, and the second current control circuit 9 is used for controlling the constant current value of the negative voltage constant current circuit 8. The positive voltage constant current circuit 4 and the negative voltage constant current circuit 8 can set the discharge current of the power supply to be tested. The first protection circuit 5 and the second protection circuit 10 are process protection circuits, and in the working process, when the current, the voltage or the power exceeds a certain value, a protection effect is generated. Specifically, referring to fig. 5, the first protection circuit 5 and the second protection circuit 10 may include a latch protection state circuit, an over-power protection circuit, an over-current protection circuit, and an over-voltage protection circuit.
The microprocessor 13 is mainly used for controlling and processing various acquired information.
Specifically, in the embodiment of the present application, the use flow of the power test load board card is as follows: the microprocessor 13 may set a limit value associated with a current control circuit, where the current control circuit may include at least one of the first current control circuit 3, the second current control circuit 9. The current control circuit controls constant current values of the positive voltage constant current circuit 4 and the negative voltage constant current circuit 8 in response to the data value of the microprocessor 13. The first front-end protection circuit 2 and the second front-end protection circuit 11 have a slow start function and a voltage detection function, the slow start function can ensure that the constant current circuit does not generate abrupt change, and the voltage detection function can detect whether the voltage input voltage exceeds a set value. The first protection circuit 5 is used for detecting the current, voltage and power in the positive voltage constant current circuit 4, and generates protection action once the current, voltage or power value exceeds a set value. The temperature detection circuit 6 is used for detecting the temperature of the board card and the radiator. The temperature protection circuit 7 can determine whether the current temperature exceeds the set value based on the value of the temperature detection circuit 6. The second front-end protection circuit 11 also has a slow start function and a voltage detection function, wherein the slow start function can ensure that the constant current circuit does not generate abrupt change, and the voltage detection function can detect whether the voltage input voltage exceeds a set value. The second protection circuit 10 is used for detecting the current, voltage or power in the negative voltage constant current circuit 8, and generates a protection action once the current, voltage or power value exceeds a set value.
Beneficial effects of embodiments of the present application include, but are not limited to: the microcontroller is matched with the current control circuit to accurately control the constant current circuit, and hardware support is provided for high precision and stepping precision. The power supply test load board card can realize the input of positive and negative voltages, provides flexible test conditions for a power supply to be tested with positive and negative voltages, and ensures the safety of operators, test equipment and the power supply to be tested by various protection circuits.
In the description of the present specification, reference to the term "one embodiment," "another embodiment," or "certain embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.
Claims (7)
1. A power test load board card comprising:
the device comprises a microprocessor, a first current control circuit, a second current control circuit, a first protection circuit, a second protection circuit, a positive voltage constant current circuit and a negative voltage constant current circuit;
the microprocessor is connected with the positive-voltage constant-current circuit through the first current control circuit, and the positive-voltage constant-current circuit is connected with the microprocessor through the first protection circuit; the microprocessor is connected with the negative-voltage constant-current circuit through the second current control circuit, and the negative-voltage constant-current circuit is connected with the microprocessor through the second protection circuit;
the microprocessor and the positive pressure constant current circuit are used for being connected with positive pressure input signals, and the microprocessor and the negative pressure constant current circuit are used for being connected with negative pressure input signals.
2. The power test load board of claim 1, wherein: the power supply test load board card further comprises a first front-end protection circuit and a second front-end protection circuit;
the microprocessor and the positive-pressure constant-current circuit are connected with positive-pressure input signals through the first front-end protection circuit, and the microprocessor and the negative-pressure constant-current circuit are connected with negative-pressure input signals through the second front-end protection circuit.
3. The power test load board of claim 1, wherein: the first protection circuit comprises a latch protection state circuit, an over-power protection circuit, an over-current protection circuit and an over-voltage protection circuit.
4. The power test load board of claim 2, wherein: the first front-end protection circuit comprises a fuse circuit, a buffer starting circuit and an input detection circuit.
5. The power test load board card of any one of claims 1-4, wherein: the microprocessor includes any of the MCU, FPGA, CPLD, DSP, ARM chips.
6. The power test load board of claim 5, wherein: the microprocessor includes an ATmega1284P chip.
7. The power test load board of claim 1, wherein: the power supply test load board card further comprises a temperature detection circuit and a temperature protection circuit, wherein the temperature detection circuit is connected to the microprocessor through the temperature protection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322056426.6U CN220626617U (en) | 2023-08-01 | 2023-08-01 | Power supply test load board card |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322056426.6U CN220626617U (en) | 2023-08-01 | 2023-08-01 | Power supply test load board card |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220626617U true CN220626617U (en) | 2024-03-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322056426.6U Active CN220626617U (en) | 2023-08-01 | 2023-08-01 | Power supply test load board card |
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| Country | Link |
|---|---|
| CN (1) | CN220626617U (en) |
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2023
- 2023-08-01 CN CN202322056426.6U patent/CN220626617U/en active Active
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