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Changes for page Sensor Module

Last modified by Heimir Thordarson on 2026/07/05 12:56
From version 43.1
edited by Heimir Thordarson
on 2026/01/27 14:42
Change comment: There is no comment for this version
To version 46.8
edited by Heimir Thordarson
on 2026/01/27 15:42
Change comment: There is no comment for this version

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... ... @@ -115,7 +115,7 @@
115 115  * {{mathjax}}\(R\){{/mathjax}} = Resistance of the resistor in low-pass filter.
116 116  * {{mathjax}}\(C\){{/mathjax}} = Capacitance of the capacitor in the low-pass filter.
117 117  
118 -Using a resistor with 10k {{mathjax}}\(\Omega\){{/mathjax}} and a capacitor with 100 **nF **in capacitance, the cut-off frequency will be 159 **Hz.**
118 +Using a resistor with 1k {{mathjax}}\(\Omega\){{/mathjax}} and a capacitor with 100 **nF **in capacitance, the cut-off frequency will be 1592 **Hz.**
119 119  
120 120  == Suspension Displacement Sensor ==
121 121  
... ... @@ -123,6 +123,31 @@
123 123  
124 124  [[image:Suspension Displacement Circuit.png]]
125 125  
126 +The sensor has a measurable range of 50mm with electrical range of 51mm, meaning that the electrical range will in practice be 1960 {{mathjax}}\(\Omega\){{/mathjax}} with 40 {{mathjax}}\(\Omega\){{/mathjax}} in total on each end.
126 126  
128 +[[image:Actual Representation of Linear Potmeter.png||height="195" width="309"]]
127 127  
130 +This can then be used to create the length of the sensor based on the input voltage.
131 +
132 +(% style="font-size: 1.5em;" %)
133 +(((
134 +{{mathjax}}
135 +$$
136 +x = \frac{50}{1960} \left( \frac{2000\,V_{\text{out}}}{V_s} - 20 \right)
137 +$$
138 +{{/mathjax}}
139 +)))
140 +
141 +where:
142 +
143 +* {{mathjax}}\(x\){{/mathjax}} = The mechanical placement excluding the dead length (178mm).
144 +* {{mathjax}}\(V_s\){{/mathjax}} = The supply voltage of the linear potentiometer, in this case it is 3.3 {{mathjax}}\(V\){{/mathjax}}.
145 +* {{mathjax}}\(V_{out}\){{/mathjax}} = The output voltage of the linear potentiometer. ranging from 0.033{{mathjax}}\(V\){{/mathjax}} to 3.267{{mathjax}}\(V\){{/mathjax}}.
146 +
147 +=== Filtering ===
148 +
149 +The sensors output latency can be expected to be a lot shorter than the air temperature sensor as the sensor is just a variable sensor based on placement. The limiting factor for the system which uses this information is the CAN-BUS messages from the inverters which send the information each 6.25 milliseconds. This means that the cut-off frequency cannot be any lower than 160 Hz, which will make the same type of low pass filter from the air temperature sensor acceptable with a cut-off frequency of 1591 Hz.
150 +
151 +== Cooling Sensors ==
152 +
128 128  
Actual Representation of Linear Potmeter.png
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1 +XWiki.117349330247369537212
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