Changes for page Sensor Module

Summary

• Page properties (1 modified, 0 added, 0 removed)

Details

Page properties

Content

...	...	@@ -53,14 +53,8 @@
53	53	|(% style="width:71px" %)14|(% style="width:164px" %)CAN High 1|(% style="width:124px" %)CAN|(% style="width:70px" %)29|(% style="width:218px" %)CAN Low 2|(% style="width:58px" %)CAN|(% style="width:32px" %)44|(% style="width:192px" %)Main Power|(% style="width:90px" %)+24V
54	54	|(% style="width:71px" %)15|(% style="width:164px" %)CAN Low 1|(% style="width:124px" %)CAN|(% style="width:70px" %)30|(% style="width:218px" %)CAN High 2|(% style="width:58px" %)CAN|(% style="width:32px" %) |(% style="width:192px" %) |(% style="width:90px" %)
55	55
	56	+== Air Temperature Sensor ==
56	56
57		-
58		-== Typical Application ==
59		-
60		-This section will cover the sensors which will be used for AR26 and how the sensor module is designed to accommodate them.
61		-
62		-=== Air Temperature Sensor ===
63		-
64	64	The air temperature sensor will be used to have a dynamic reference setpoint for the cooling system. This could reduce the current draw from the low voltage system compared to having a fixed reference point. This is because the regulator will not try to cool the water to a temperature lower than the ambient temperature. The sensor works as a resistor which varies depending on its temperature. Where in this case, the resistance lowers when the temperature increases (NTC). To make the microcontroller able to measure the changes in resistance, the thermistor is put into a voltage divider circuit.
65	65
66	66	[[image:circuit with marks.png||height="218" width="520"]]
...	...	@@ -95,7 +95,38 @@
95	95	{{/mathjax}}
96	96	)))
97	97
98		-* {{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 3694 //**K**//
	92	+where:
	93	+
	94	+* {{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 3694 //**K.**//
99	99	* {{mathjax}}\(T_0\){{/mathjax}} = The test temperature at which the thermistor is 10k {{mathjax}}\(\Omega\){{/mathjax}}, which in this case is 25 degrees celsius.
100	100	* {{mathjax}}\(R_0\){{/mathjax}} = The resistance of the thermistor when it is 25 degrees celsius.
101		-* {{mathjax}}\(R_T\){{/mathjax}} = Resistance of the
	97	+* {{mathjax}}\(R_T\){{/mathjax}} = The current resistance of the thermistor.
	98	+
	99	+=== Filtering ===
	100	+
	101	+Considering that the sensor can only promise a reaction time of 5 seconds when in water, it can be assumed that a heavy filter will not add any problematic latencies. To ensure a low cost, the filter uses common components which will filter any noise above the inverter switching noise.
	102	+
	103	+(% style="font-size: 1.5em;" %)
	104	+(((
	105	+{{mathjax}}
	106	+$$
	107	+F_c = \frac{1}{2 \pi R C}
	108	+$$
	109	+{{/mathjax}}
	110	+)))
	111	+
	112	+Where:
	113	+
	114	+* {{mathjax}}\(F_c\){{/mathjax}} = Cut-off frequency of the filter. Any noise with a frequency above this will be filtered out.
	115	+* {{mathjax}}\(R\)
	116	+{{/mathjax}} = Resistance of the resistor in low-pass filter.
	117	+* {{mathjax}}\(C\)
	118	+{{/mathjax}} = Capacitance of the capacitor in the low-pass filter.
	119	+
	120	+Using a resistor with 10k {{mathjax}}\(\Omega\){{/mathjax}} and a capacitor with 100 **nF **in capacitance, the cut-off frequency will be 159 **Hz.**
	121	+
	122	+== Suspension Displacement Sensor ==
	123	+
	124	+For AR26, the same sensors from AR25 is reused. These are the [[Texense RSL-A-50-P>>https://cdn.shopify.com/s/files/1/0368/1989/files/technical_datasheet_RSL.pdf?413]] which can be connected as the entire voltage divider when using each end as supply and ground. The output of the sensor will then be the
	125	+
	126	+