CN112051513A - Power strip state detection circuit - Google Patents
Power strip state detection circuit Download PDFInfo
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- CN112051513A CN112051513A CN202010949245.4A CN202010949245A CN112051513A CN 112051513 A CN112051513 A CN 112051513A CN 202010949245 A CN202010949245 A CN 202010949245A CN 112051513 A CN112051513 A CN 112051513A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/40—Testing power supplies
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Abstract
The invention discloses a power panel state detection circuit, which specifically comprises a temperature detection circuit for detecting temperature information of a power panel in a working state; the control chip circuit receives the temperature information transmitted by the temperature detection circuit; an input electromagnetic compatible circuit for suppressing electromagnetic noise and clutter from the voltage at the input end of the power supply; the voltage conversion isolation circuit receives the voltage signal transmitted by the input electromagnetic isolation circuit, and the circuit can transmit the acquired temperature information of the power panel to the traction control chip for use and storage in real time, so that engineering personnel can know the real-time temperature of the power panel during working, and technical support is provided for subsequently adding power panel fault prediction and health management functions.
Description
Technical Field
The invention relates to the technical field of power panel monitoring, in particular to a power panel state detection circuit.
Background
With the development of electronic technology, high-speed railways rapidly develop and simultaneously put forward higher requirements on the safety of vehicle electronic equipment, and the power safety of a traction control unit directly influences the working state of a vehicle, so that the detection of the state of a power panel of a locomotive traction control unit is of great importance to the stable operation of the vehicle. The traditional state monitoring of the power panel of the locomotive traction control unit only comprises power output indication, only can obtain information whether the power panel has output voltage, lacks other information which can be judged, and is not beneficial to the cutting off of the output voltage and the judgment of fault information when in fault. Therefore, it is necessary to increase the detection of the status information of the power panel and to increase the safety of the device during power supply and operation.
The structure of a conventional power panel of a locomotive traction control unit is shown in fig. 1. The front panel is connected with input voltage, the input voltage is processed by the electromagnetic compatibility circuit and the voltage conversion circuit to output target voltage, and the target voltage is supplied to other circuit boards in the traction control unit through the back panel. Although the existing locomotive traction control unit circuit board structure has a good function of converting voltage input into voltage output and complete input/output protection, the existing locomotive traction control unit circuit board structure lacks a working state judgment circuit of a power panel, and when some power panel faults occur, the output voltage cannot be actively cut off, so that potential safety hazards are possibly caused, and the existing locomotive traction control unit circuit board structure is not beneficial to judgment and processing of personnel. If the judgment of the insertion position information of the power panel is lacked, the influence on the rear-stage circuit board can be caused; the working temperature judgment is lacked, the output of the existing power panel can be cut off only when the device fails due to the temperature change, and the output function according to the set temperature is lacked; lack of information interaction with the post processor, inability to make work decisions based on post processor information, etc.
Disclosure of Invention
According to the problems in the prior art, the invention discloses a power panel state detection circuit, which specifically comprises a temperature detection circuit for detecting temperature information of a power panel in a working state;
the control chip circuit receives the temperature information transmitted by the temperature detection circuit, firstly reads the position data of the board card stored in the read-only memory in the backboard through the SPI bus, compares the position data with the position data stored in the control chip circuit, reads the temperature information transmitted by the temperature detection circuit through the IIC bus when the position information is correct, and outputs the judgment information of the normal work of the power supply through the output port and the backboard when the temperature is in the set range;
an input electromagnetic compatible circuit for suppressing electromagnetic noise and clutter from the voltage at the input end of the power supply;
the voltage conversion isolation circuit receives a voltage signal transmitted by the input electromagnetic isolation circuit, converts the received voltage into a grade meeting the use requirement and outputs the grade, and simultaneously carries out isolation processing on the input voltage and the output voltage;
the output electromagnetic compatibility circuit is used for receiving the voltage signal transmitted by the voltage conversion isolation circuit, and filtering the received voltage and inhibiting a high-frequency clutter signal generated by the power panel;
the output electromagnetic compatible circuit is connected with a voltage circuit on the traction control circuit board through the back plate, the voltage circuit is connected with the traction control chip, and when the control chip judges that the power panel works normally, a high level signal is sent to the traction control chip through the back plate; when the traction control chip judges that the power supply needs to be disconnected, a high-level signal is sent to the control chip circuit through the back plate, and the control chip circuit is controlled to disconnect the output of the power supply;
the output end of the control chip circuit is electrically isolated from the optical coupling isolation circuit, the optical coupling isolation circuit is used for electrically isolating the input end and the output end of the circuit, when the control chip circuit detects that fault information exists in the power panel, a low-level signal is output to the optical coupling isolation circuit, and the optical coupling isolation circuit works to enable the control end of the voltage conversion isolation circuit to be at a low level;
and the state display circuit is used for receiving the working state information of the power panel transmitted by the control chip circuit.
Due to the adoption of the technical scheme, the power panel state detection circuit provided by the invention can transmit the acquired power panel temperature information to the traction control chip in real time for use and storage when the traction control chip and the control chip carry out information interaction, so that engineering personnel can know the real-time temperature of the power panel during working, and technical support is provided for the subsequent addition of power panel fault prediction and health management functions.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram of a power strip for a locomotive traction control unit in the prior art;
fig. 2 is a schematic structural diagram of a power panel status detection circuit according to the present invention.
Detailed Description
In order to make the technical solutions and advantages of the present invention clearer, the following describes the technical solutions in the embodiments of the present invention clearly and completely with reference to the drawings in the embodiments of the present invention:
the power panel state detection circuit shown in fig. 1 specifically comprises a temperature detection circuit, a control chip circuit, an input electromagnetic isolation circuit, a voltage conversion isolation circuit, an output electromagnetic compatibility circuit, a voltage circuit, a traction control chip, an optical coupling isolation circuit and a state display circuit.
After the power panel is connected with input voltage, the control chip circuit reads board position data stored in the backboard EEPROM through the SPI bus and compares the board position data with position data stored in the control chip circuit, when the position information is correct, the control chip circuit reads temperature information stored in the LM75BDP digital temperature sensor in the temperature detection circuit through the IIC bus, when the temperature is in a set range, the control chip circuit informs the traction control chip circuit of normal work of a power supply through an output port through the backboard, the state display circuit adopts a warning lamp for displaying, when the traction control chip detects that a fault needs to be cut off, the control chip circuit of the power panel is informed, and the control chip circuit controls the power supply to output a disconnected command through the optical coupling isolation circuit.
The input electromagnetic isolation circuit is used for inhibiting electromagnetic noise and clutter in a voltage signal at the input end of the power supply, preventing interference from entering, and preventing high-frequency clutter generated by the power supply board from interfering the input power supply.
The output electromagnetic compatibility circuit enables the voltage output by the voltage conversion isolation circuit to be smooth and stable, and meanwhile, the interference of high-frequency noise waves generated by the power panel to other circuit boards is also prevented.
The voltage conversion isolation circuit performs voltage reduction processing on input voltage, and simultaneously isolates output voltage from the input voltage to prevent mutual interference. The voltage circuit is connected with the traction control chip and receives and outputs a voltage signal transmitted by the electromagnetic compatibility circuit.
The optical coupling isolation circuit is used for electrically isolating the input end and the output end of the circuit, and output signals are guaranteed to have no influence on the input end, so that the optical coupling isolation circuit achieves the effects of strong anti-interference capability and stable work.
Furthermore, when the control chip circuit detects fault information and outputs a low level to the input end of the optical coupling isolation circuit, the optical coupling isolation circuit starts to work, the output end of the optical coupling isolation circuit is equivalent to a short circuit, the control end of the voltage conversion isolation circuit is connected to the ground, and the voltage conversion isolation circuit is closed to disconnect power supply output.
Furthermore, when the control chip judges that the power panel can work normally, the control chip circuit sends out a high level to inform the traction control chip of normal work of the power supply through the back plate; when the traction control chip judges that the power supply output needs to be disconnected, the traction control chip sends out a high level and informs the control chip circuit to disconnect the power supply output through the back plate.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (1)
1. A power strip condition detection circuit, comprising:
the temperature detection circuit is used for detecting temperature information of the power panel in a working state;
the control chip circuit receives the temperature information transmitted by the temperature detection circuit, firstly reads the position data of the board card stored in the read-only memory in the backboard through the SPI bus, compares the position data with the position data stored in the control chip circuit, reads the temperature information transmitted by the temperature detection circuit through the IIC bus when the position information is correct, and outputs the judgment information of the normal work of the power supply through the output port and the backboard when the temperature is in the set range;
an input electromagnetic compatible circuit for suppressing electromagnetic noise and clutter from the voltage at the input end of the power supply;
the voltage conversion isolation circuit receives a voltage signal transmitted by the input electromagnetic isolation circuit, converts the received voltage into a grade meeting the use requirement and outputs the grade, and simultaneously carries out isolation processing on the input voltage and the output voltage;
the output electromagnetic compatibility circuit is used for receiving the voltage signal transmitted by the voltage conversion isolation circuit, and filtering the received voltage and inhibiting a high-frequency clutter signal generated by the power panel;
the output electromagnetic compatible circuit is connected with a voltage circuit on the traction control circuit board through the back plate, the voltage circuit is connected with the traction control chip, and when the control chip judges that the power panel works normally, a high level signal is sent to the traction control chip through the back plate; when the traction control chip judges that the power supply needs to be disconnected, a high-level signal is sent to the control chip circuit through the back plate, and the control chip circuit is controlled to disconnect the output of the power supply;
the output end of the control chip circuit is electrically isolated from the optical coupling isolation circuit, the optical coupling isolation circuit is used for electrically isolating the input end and the output end of the circuit, when the control chip circuit detects that fault information exists in the power panel, a low-level signal is output to the optical coupling isolation circuit, and the optical coupling isolation circuit works to enable the control end of the voltage conversion isolation circuit to be at a low level;
and the state display circuit is used for receiving the working state information of the power panel transmitted by the control chip circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010949245.4A CN112051513B (en) | 2020-09-10 | 2020-09-10 | Power panel state detection circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010949245.4A CN112051513B (en) | 2020-09-10 | 2020-09-10 | Power panel state detection circuit |
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| CN112051513A true CN112051513A (en) | 2020-12-08 |
| CN112051513B CN112051513B (en) | 2023-09-19 |
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| CN112051513B (en) | 2023-09-19 |
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