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steinhart_hart: Beta Parameter uom dimensions

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The Beta Parameter is not dimensionless, and has unit Kelvin.
Incorporate that into the type system for better checks.
This commit is contained in:
atse 2023-08-28 14:52:09 +08:00
parent 1ae6a6fdd4
commit c1b183ddd5
2 changed files with 7 additions and 7 deletions
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4
src/command_handler.rs
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@ -38,7 +38,7 @@ use uom::{
electric_current::ampere,
electric_potential::volt,
electrical_resistance::ohm,
thermodynamic_temperature::degree_celsius,
thermodynamic_temperature::{degree_celsius, kelvin},
},
};
@ -243,7 +243,7 @@ impl Handler {
use super::command_parser::ShParameter::*;
match parameter {
T0 => sh.t0 = ThermodynamicTemperature::new::<degree_celsius>(value),
B => sh.b = value,
B => sh.b = ThermodynamicTemperature::new::<kelvin>(value),
R0 => sh.r0 = ElectricalResistance::new::<ohm>(value),
}
send_line(socket, b"{}");

10
src/steinhart_hart.rs
View File

@ -15,16 +15,16 @@ use serde::{Deserialize, Serialize};
pub struct Parameters {
/// Base temperature
pub t0: ThermodynamicTemperature,
/// Base resistance
/// Resistance at base temperature
pub r0: ElectricalResistance,
/// Beta
pub b: f64,
pub b: ThermodynamicTemperature,
}
impl Parameters {
/// Perform the voltage to temperature conversion.
/// Perform the resistance to temperature conversion.
pub fn get_temperature(&self, r: ElectricalResistance) -> ThermodynamicTemperature {
let inv_temp = 1.0 / self.t0.get::<kelvin>() + (r / self.r0).get::<ratio>().ln() / self.b;
let inv_temp = 1.0 / self.t0.get::<kelvin>() + (r / self.r0).get::<ratio>().ln() / self.b.get::<kelvin>();
ThermodynamicTemperature::new::<kelvin>(1.0 / inv_temp)
}
}
@ -34,7 +34,7 @@ impl Default for Parameters {
Parameters {
t0: ThermodynamicTemperature::new::<degree_celsius>(25.0),
r0: ElectricalResistance::new::<ohm>(10_000.0),
b: 3800.0,
b: ThermodynamicTemperature::new::<kelvin>(3800.0),
}
}
}