Changes for page Sensor Module
Last modified by Heimir Thordarson on 2026/07/05 12:56
From version 63.5
edited by Heimir Thordarson
on 2026/02/26 18:26
on 2026/02/26 18:26
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To version 64.8
edited by Heimir Thordarson
on 2026/03/23 19:39
on 2026/03/23 19:39
Change comment:
There is no comment for this version
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... ... @@ -196,9 +196,9 @@ 196 196 197 197 where: 198 198 199 -* {{mathjax}}\(x\){{/mathjax}} 199 +* {{mathjax}}\(x\){{/mathjax}}= The mechanical placement excluding the dead length (178mm). 200 200 * {{mathjax}}\(V_s\){{/mathjax}}= The supply voltage of the linear potentiometer, in this case it is 3.3 {{mathjax}}\(V\){{/mathjax}}. 201 -* {{mathjax}}\(V_{out}\){{/mathjax}} 201 +* {{mathjax}}\(V_{out}\){{/mathjax}}= The output voltage of the linear potentiometer. ranging from 0.033{{mathjax}}\(V\){{/mathjax}} to 3.267{{mathjax}}\(V\){{/mathjax}}. 202 202 203 203 === Filtering === 204 204 ... ... @@ -250,41 +250,36 @@ 250 250 251 251 The sensors output latency can be expected to be a lot shorter than the oil 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 oil temperature sensor acceptable with a cut-off frequency of 1591 Hz. 252 252 253 +== Cooling System Sensor == 254 + 255 +There will be four cooling system sensor on the AR26 vehicle, and all of the sensors include two measurements each. These two signals are water temperature and pressure. With this the temperature delta over the entire cooling system can be measured, but also the overall water flow. If the equivalent orifice of the motors, inverters and other components are known, the flow can be calculated using the orifice equation. 256 + 257 + 258 +(% style="font-size: 1.5em;" %) 259 +((( 260 +{{mathjax}} 261 +$$ 262 +T = \frac{1}{\frac{1}{T_0} + \frac{1}{\beta} \ln\left(\frac{R_T}{R_0}\right)} 263 +$$ 264 +{{/mathjax}} 265 +))) 266 + 267 + 268 +where: 269 + 270 +* {{mathjax}}\(\beta\){{/mathjax}}= material constant that defines the steepness of its resistance-temperature curve between two temperature points, usually 25/85 degrees celsius. In this case it is 3976 //**K.**// 271 +* {{mathjax}}\(T_0\){{/mathjax}}= The test temperature at which the thermistor is 10k {{mathjax}}\(\Omega\){{/mathjax}}, which in this case is 25 degrees celsius. 272 +* {{mathjax}}\(R_0\){{/mathjax}}= The resistance of the thermistor when it is 25 degrees celsius. 273 +* {{mathjax}}\(R_T\){{/mathjax}}= The live resistance of the thermistor. 274 + 275 + 276 + 277 + 278 + 253 253 = Bill of Materials = 254 254 255 255 == Circuit Board == 256 256 257 -|=(% style="width: 184px;" %)Manufacture Part Number|=(% style="width: 654px;" %)Design|= |= |=(% style="width: 1px;" %) |=(% style="width: 165.531px;" %) |= |= |= |= 258 -|(% style="width:184px" %) |(% style="width:654px" %) | | |(% style="width:1px" %) |(% style="width:165.531px" %) | | | | 259 -|(% style="width:184px" %) |(% style="width:654px" %) | | |(% style="width:1px" %) |(% style="width:165.531px" %) | | | | 260 -|(% style="width:184px" %) |(% style="width:654px" %) | | |(% style="width:1px" %) |(% style="width:165.531px" %) | | | | 261 -|(% style="width:184px" %) |(% style="width:654px" %) | | |(% style="width:1px" %) |(% style="width:165.531px" %) | | | | 262 -|(% style="width:184px" %) |(% style="width:654px" %) | | |(% style="width:1px" %) |(% style="width:165.531px" %) | | | | 263 -|(% style="width:184px" %) |(% style="width:654px" %) | | |(% style="width:1px" %) |(% style="width:165.531px" %) | | | | 264 -|(% style="width:184px" %) |(% style="width:654px" %) | | |(% style="width:1px" %) |(% style="width:165.531px" %) | | | | 265 -|(% style="width:184px" %) |(% style="width:654px" %) | | |(% style="width:1px" %) |(% style="width:165.531px" %) | | | | 266 -|(% style="width:184px" %) |(% style="width:654px" %) | | |(% style="width:1px" %) |(% style="width:165.531px" %) | | | | 267 -|(% style="width:184px" %) |(% style="width:654px" %) | | |(% style="width:1px" %) |(% style="width:165.531px" %) | | | | 268 -|(% style="width:184px" %) |(% style="width:654px" %) | | |(% style="width:1px" %) |(% style="width:165.531px" %) | | | | 269 -|(% style="width:184px" %) |(% style="width:654px" %) | | |(% style="width:1px" %) |(% style="width:165.531px" %) | | | | 270 -|(% style="width:184px" %) |(% style="width:654px" %) | | |(% style="width:1px" %) |(% style="width:165.531px" %) | | | | 271 -|(% style="width:184px" %) |(% style="width:654px" %) | | |(% style="width:1px" %) |(% style="width:165.531px" %) | | | | 272 -|(% style="width:184px" %) |(% style="width:654px" %) | | |(% style="width:1px" %) |(% style="width:165.531px" %) | | | | 273 -|(% style="width:184px" %) |(% style="width:654px" %) | | |(% style="width:1px" %) |(% style="width:165.531px" %) | | | | 274 -|(% style="width:184px" %) |(% style="width:654px" %) | | |(% style="width:1px" %) |(% style="width:165.531px" %) | | | | 275 -|(% style="width:184px" %) |(% style="width:654px" %) | | |(% style="width:1px" %) |(% style="width:165.531px" %) | | | | 276 -|(% style="width:184px" %) |(% style="width:654px" %) | | |(% style="width:1px" %) |(% style="width:165.531px" %) | | | | 277 -|(% style="width:184px" %) |(% style="width:654px" %) | | |(% style="width:1px" %) |(% style="width:165.531px" %) | | | | 278 -|(% style="width:184px" %) |(% style="width:654px" %) | | |(% style="width:1px" %) |(% style="width:165.531px" %) | | | | 279 -|(% style="width:184px" %) |(% style="width:654px" %) | | |(% style="width:1px" %) |(% style="width:165.531px" %) | | | | 280 -|(% style="width:184px" %) |(% style="width:654px" %) | | |(% style="width:1px" %) |(% style="width:165.531px" %) | | | | 281 -|(% style="width:184px" %) |(% style="width:654px" %) | | |(% style="width:1px" %) |(% style="width:165.531px" %) | | | | 282 -|(% style="width:184px" %) |(% style="width:654px" %) | | |(% style="width:1px" %) |(% style="width:165.531px" %) | | | | 283 -|(% style="width:184px" %) |(% style="width:654px" %) | | |(% style="width:1px" %) |(% style="width:165.531px" %) | | | | 284 -|(% style="width:184px" %) |(% style="width:654px" %) | | |(% style="width:1px" %) |(% style="width:165.531px" %) | | | | 285 -|(% style="width:184px" %) |(% style="width:654px" %) | | |(% style="width:1px" %) |(% style="width:165.531px" %) | | | | 286 -|(% style="width:184px" %) |(% style="width:654px" %) | | |(% style="width:1px" %) |(% style="width:165.531px" %) | | | | 287 - 288 288 == Wiring Harness == 289 289 290 290 == Sensors ==