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wow is this some sort of precision limitation for Steinhart-Hart?

This commit is contained in:
Andrey 2024-07-16 16:35:14 -04:00
parent 16e3ebab67
commit 2e5c3e6504
1 changed files with 44 additions and 0 deletions
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44
unit_tests/tests/sensor/therm_func.cpp
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@ -5,6 +5,9 @@
#include "pch.h"
#include "thermistor_func.h"
#include "thermistors.h"
#include "functional_sensor.h"
#include "init.h"
TEST(thermistor, Thermistor1) {
ThermistorFunc tf;
@ -53,3 +56,44 @@ TEST(thermistor, PtcAirCooledMotorcycle) {
ASSERT_NEAR(tf.convert(1300).value_or(0), 150, 2);
ASSERT_NEAR(tf.convert(1846).value_or(0), 220, 2);
}
TEST(Thermistor, Option1) {
EngineTestHelper eth(engine_type_e::TEST_ENGINE, [](engine_configuration_s* engineConfiguration) {
engineConfiguration->auxTempSensor1.adcChannel = EFI_ADC_12;; // arbitrary
});
setAtSensor(&engineConfiguration->auxTempSensor1, /*temp low*/-13.9, 73300, /*temp mid*/23.7, 10630 , /*temp high*/ 60, 2280);
initNewSensors();
FunctionalSensor * aatSensor = (FunctionalSensor*)Sensor::getSensorOfType(SensorType::AuxTemp1);
ASSERT_TRUE(aatSensor != nullptr);
thermistor_t *tFuncAat = (thermistor_t *)aatSensor->getFunction();
ThermistorFunc *thermistorFuncAat = tFuncAat->getPtr<ThermistorFunc>();
ASSERT_NEAR(60, thermistorFuncAat->convert(2280).Value, EPS2D);
ASSERT_NEAR(49.83, thermistorFuncAat->convert(3413).Value, EPS2D);
}
TEST(Thermistor, Option2) {
EngineTestHelper eth(engine_type_e::TEST_ENGINE, [](engine_configuration_s* engineConfiguration) {
engineConfiguration->auxTempSensor1.adcChannel = EFI_ADC_12;; // arbitrary
});
setAtSensor(&engineConfiguration->auxTempSensor1, /*temp low*/-13.9, 73300, /*temp mid*/23.5, 53100 , /*temp high*/ 60, 2280);
initNewSensors();
FunctionalSensor * aatSensor = (FunctionalSensor*)Sensor::getSensorOfType(SensorType::AuxTemp1);
ASSERT_TRUE(aatSensor != nullptr);
thermistor_t *tFuncAat = (thermistor_t *)aatSensor->getFunction();
ThermistorFunc *thermistorFuncAat = tFuncAat->getPtr<ThermistorFunc>();
ASSERT_NEAR(60, thermistorFuncAat->convert(2280).Value, EPS2D);
// WOW! how cool is this issue - resistance between mid and high temps gives us a temperature way above high point!
// fun fact: java script version is not broken https://rusefi.com/Steinhart-Hart.html is this about loss of precision?
ASSERT_NEAR(104.094, thermistorFuncAat->convert(3413).Value, EPS2D);
ASSERT_NEAR(23.5, thermistorFuncAat->convert(53100).Value, EPS2D);
}