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BSPD fertig zum abgeben

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This commit is contained in:
Hamza Tamim 2025-05-05 19:51:38 +02:00
parent 24a3127067
commit 25672d3c94
2 changed files with 6 additions and 6 deletions
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BSPD-schematic/BSPD-schematic.pdf
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BSPD-schematic/BSPD-schematic.tex
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@ -38,22 +38,22 @@
\end{figure}
The BSPD PCB is located in the front Sensor-Node (Where the main PCB for sensor signal processing resides),
in which a separate compartment is created to ensure the BSPD can be separated sealed without affecting other parts in the same housing.
in which a separate compartment is created to ensure the BSPD can be separately sealed without affecting other parts in the same housing.
The current sensor and the brake pressure sensor are connected directly to the BSPD. The datasheet of the sensors used are shown in reference. \cite{lem_datasheet} \cite{adz_datasheet}
\section{SCS signal implementation}
For Out-of-Range signal such as Open circuit, Short circuit to ground, Short circuit to
supply voltage, pull-down resistors (\texttt{R3} and \texttt{R4}) are used to ensure that they are out of the valid
For Out-of-Range signals such as "open circuit", "short circuit to ground", "short circuit to
supply voltage", the pull-down resistors (\texttt{R3} and \texttt{R4}) are used to ensure that they are out of the valid
range determined by the reference voltages (\texttt{current\_ref}, \texttt{brake\_ref} and \texttt{low\_ref} in schematic).
Once this happens, the photovoltaic relay (\texttt{U4}) will open the shutdown circuit and the AIRs.\cite{pvg612_datasheet}
\medskip
As shown in the schematic, the error latching is realized with the RC Combination \texttt{R21} and \texttt{C13}.
In case of an error the open collector output of \texttt{U1A} is discharging \texttt{C13} via a small resistor \texttt{R21}, causing \texttt{U1B} to open the Shutdown Circuit.
If the error is removed, \texttt{C13} is charged via \texttt{R20} in series with \texttt{R21}, resulting in a time delay of ~11.65s. (as shown below)
If the error is removed, \texttt{C13} is charged via \texttt{R20} in series with \texttt{R21}, resulting in a time delay of $\approx11.65s$
\begin{align}
-(ln(1-\SI{3.44}{V}/\SI{5}{V})) \cdot \SI{10}{\micro\farad} \cdot \SI{1}{\mega\ohm} = \SI{11.65}{\second}
-(ln(1-\SI{3.44}{V}/\SI{5}{V})) \cdot \SI{10}{\micro\farad} \cdot \SI{1}{\mega\ohm} \approx \SI{11.65}{\second}
\end{align}
\newpage
@ -64,7 +64,7 @@ The test procedure is shown here:
\textbf{Test Procedure}
\begin{enumerate}
\item apply external test current to the simulation coil
\item brake hard (with brake pressure $\geq 30 \unit{\bar}$)
\item brake with a pressure of $\geq 30 \unit{\bar}$
\end{enumerate}
\textbf{Test Current Calculation}