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Add Temperature Monitor to Thermostat

- Issue an alarm when temperature goes out of user-defined operating range during Pid Controller startup
    or reading is outside of +-0.5 Degree from temperature set point after Pid Controller becomes stable
- If alarm is observed, power down laser and tec controller and disengage Pid Controller
- Add the corresponding cmd for configuring the temperature monitor
This commit is contained in:
linuswck 2024-02-21 15:49:08 +08:00
parent ed785b7c85
commit a8787430b1
5 changed files with 221 additions and 2 deletions

View File

@ -97,6 +97,12 @@ fn main() -> ! {
laser.poll_and_update_output_current();
if thermostat.poll_adc_and_update_pid() {
if thermostat.get_temp_mon_status().over_temp_alarm {
laser.power_down();
thermostat.set_pid_engaged(false);
thermostat.power_down();
}
info!("curr_dac_vfb: {:?}", volt_fmt.with(thermostat.get_dac_vfb()));
info!("curr_vref: {:?}", volt_fmt.with(thermostat.get_vref()));
info!("curr_tec_i: {:?}", amp_fmt.with(thermostat.get_tec_i()));

View File

@ -71,6 +71,10 @@ enum ThermostatCmdEnum {
SetPidOutMin,
SetPidOutMax,
SetPidUpdateInterval, // Update Interval is set based on the sampling rate of ADC
// TempMon
SetTempMonUpperLimit,
SetTempMonLowerLimit,
ClearAlarm,
// Steinhart-Hart Equation
SetShT0,
SetShR0,
@ -342,6 +346,29 @@ pub fn execute_cmd(buffer: &mut [u8], buffer_size: usize, mut laser: LdDrive, mu
Some(ThermostatCmdEnum::SetPidUpdateInterval) => {
info!("Not supported Yet")
}
Some(ThermostatCmdEnum::SetTempMonUpperLimit) => {
match cmd.json.data_f64 {
Some(val) => {
tec.set_temp_mon_upper_limit(ThermodynamicTemperature::new::<degree_celsius>(val));
}
None => {
info!("Wrong Data type is received")
}
}
}
Some(ThermostatCmdEnum::SetTempMonLowerLimit) => {
match cmd.json.data_f64 {
Some(val) => {
tec.set_temp_mon_lower_limit(ThermodynamicTemperature::new::<degree_celsius>(val));
}
None => {
info!("Wrong Data type is received")
}
}
}
Some(ThermostatCmdEnum::ClearAlarm) => {
tec.clear_temp_mon_alarm();
}
Some(ThermostatCmdEnum::SetShT0) => {
match cmd.json.data_f64 {
Some(val) => {

View File

@ -4,3 +4,4 @@ pub mod thermostat;
pub mod ad7172;
pub mod steinhart_hart;
pub mod pid_state;
pub mod temp_mon;

155
src/thermostat/temp_mon.rs Normal file
View File

@ -0,0 +1,155 @@
use serde::{Deserialize, Serialize};
use miniconf::Tree;
use uom::si::{
thermodynamic_temperature::degree_celsius,
f64::ThermodynamicTemperature
};
use num_traits::Float;
#[derive(PartialEq, Deserialize, Serialize, Copy, Clone, Default, Debug)]
pub enum TempStatusEnum {
#[default]
Off,
OverTemp,
Unstable,
Stable,
}
#[derive(Deserialize, Serialize, Copy, Clone, Debug, Tree)]
pub struct TempStatus {
pub status: TempStatusEnum,
pub over_temp_alarm: bool,
}
pub struct TempMonSettings {
pub upper_limit: ThermodynamicTemperature,
pub lower_limit: ThermodynamicTemperature,
}
pub struct TempMon {
pub upper_limit: ThermodynamicTemperature,
pub lower_limit: ThermodynamicTemperature,
pub set_point: ThermodynamicTemperature,
pub status: TempStatus,
state: State,
count: u32,
is_set_point_changed: bool,
}
impl Default for TempMon {
fn default() -> Self {
Self {
upper_limit: ThermodynamicTemperature::new::<degree_celsius>(45.0),
lower_limit: ThermodynamicTemperature::new::<degree_celsius>(0.0),
set_point: ThermodynamicTemperature::new::<degree_celsius>(0.0),
status: TempStatus {
status: TempStatusEnum::Off,
over_temp_alarm: false
},
state: State::default(),
count: 0,
// stable_temp_count: 0,
is_set_point_changed: false,
}
}
}
#[derive(Default, PartialEq, Debug)]
enum State {
#[default]
PidOff,
PidStartUp,
PidStable,
OverTempAlarm,
}
impl TempMon {
const OVER_TEMP_COUNT_LIMIT: u32 = 25;
const TEMP_STABLE_COUNT_LIMIT: u32 = 100;
pub fn set_upper_limit(&mut self, upper_limit: ThermodynamicTemperature) {
self.upper_limit = upper_limit;
}
pub fn set_lower_limit(&mut self, lower_limit: ThermodynamicTemperature) {
self.lower_limit = lower_limit;
}
pub fn set_setpoint(&mut self, set_point: ThermodynamicTemperature) {
if self.set_point != set_point {
self.is_set_point_changed = true;
self.count = 0;
}
self.set_point = set_point;
}
pub fn clear_alarm(&mut self) {
self.status.over_temp_alarm = false;
self.state = State::default();
}
pub fn update_status(&mut self, pid_engaged: bool, temp: ThermodynamicTemperature) {
match self.state {
State::PidOff => {
self.is_set_point_changed = false;
self.status.status = TempStatusEnum::Off;
self.count = 0;
// State Transition
if pid_engaged {
self.state = State::PidStartUp;
}
}
State::PidStartUp | State::PidStable => {
let is_over_temp: bool;
if self.state == State::PidStartUp {
is_over_temp = temp > self.upper_limit || temp < self.lower_limit;
} else {
is_over_temp = (temp.value - self.set_point.value).abs() > 0.5;
}
let is_within_spec: bool = (temp.value - self.set_point.value).abs() < 0.001;
if is_over_temp {
if self.count > TempMon::OVER_TEMP_COUNT_LIMIT {
self.status.status = TempStatusEnum::OverTemp;
} else {
self.count += 1;
}
} else if is_within_spec {
if self.count > TempMon::TEMP_STABLE_COUNT_LIMIT {
self.status.status = TempStatusEnum::Stable;
} else {
self.count += 1;
}
} else {
self.status.status = TempStatusEnum::Unstable;
self.count = 0;
}
// State Transition
if self.status.status == TempStatusEnum::OverTemp {
self.state = State::OverTempAlarm;
} else if self.is_set_point_changed {
self.is_set_point_changed = false;
self.state = State::PidStartUp;
} else if self.status.status == TempStatusEnum::Stable {
self.state = State::PidStable;
}
}
State::OverTempAlarm => {
self.is_set_point_changed = false;
self.status.over_temp_alarm = true;
}
}
}
pub fn get_status(&mut self) -> TempStatus {
self.status
}
pub fn get_settings(&mut self) -> TempMonSettings {
TempMonSettings {
upper_limit: self.upper_limit,
lower_limit: self.lower_limit,
}
}
}

View File

@ -6,6 +6,7 @@ use crate::thermostat::max1968::{MAX1968, AdcReadTarget, PwmPinsEnum};
use crate::thermostat::ad7172;
use crate::thermostat::pid_state::{PidState, PidSettings};
use crate::thermostat::steinhart_hart;
use crate::thermostat::temp_mon::{TempMon, TempStatus, TempMonSettings};
use serde::{Deserialize, Serialize};
use log::debug;
use uom::si::{
@ -103,6 +104,7 @@ pub struct Thermostat {
ad7172: ad7172::AdcPhy,
pub tec_setting: TecSettings,
pid_ctrl_ch0: PidState,
temp_mon: TempMon,
}
impl Thermostat{
@ -112,6 +114,7 @@ impl Thermostat{
ad7172: ad7172,
tec_setting: TecSettings::default(),
pid_ctrl_ch0: PidState::default(),
temp_mon: TempMon::default(),
}
}
pub fn setup(&mut self){
@ -148,7 +151,8 @@ impl Thermostat{
let state: &mut PidState = &mut self.pid_ctrl_ch0;
state.update(data);
debug!("state.get_pid_engaged(): {:?}", state.get_pid_engaged());
if state.get_pid_engaged() {
let pid_engaged = state.get_pid_engaged();
if pid_engaged {
match state.update_pid() {
Some(pid_output) => {
self.set_i(ElectricCurrent::new::<ampere>(pid_output));
@ -157,12 +161,18 @@ impl Thermostat{
None => { }
}
}
debug!("Temperature: {:?} degree", self.get_temperature().get::<degree_celsius>());
let temp = self.get_temperature();
self.temp_mon.update_status(pid_engaged, temp);
debug!("Temperature: {:?} degree", temp.get::<degree_celsius>());
data_rdy = true;
});
data_rdy
}
pub fn get_temp_mon_status(&mut self) -> TempStatus {
self.temp_mon.get_status()
}
pub fn power_up(&mut self){
self.max1968.power_up();
}
@ -278,6 +288,7 @@ impl Thermostat{
StatusReport {
ts: sys_timer::now(),
pid_engaged: self.get_pid_engaged(),
temp_mon_status: self.temp_mon.get_status(),
temperature: self.pid_ctrl_ch0.get_temperature(),
i_set: self.tec_setting.i_set,
tec_i: self.get_tec_i(),
@ -335,13 +346,32 @@ impl Thermostat{
pub fn set_temperature_setpoint(&mut self, t: ThermodynamicTemperature) {
self.pid_ctrl_ch0.set_pid_setpoint(t);
self.temp_mon.set_setpoint(t);
}
pub fn set_temp_mon_upper_limit(&mut self, t: ThermodynamicTemperature) {
self.temp_mon.set_upper_limit(t);
}
pub fn set_temp_mon_lower_limit(&mut self, t: ThermodynamicTemperature) {
self.temp_mon.set_lower_limit(t);
}
pub fn clear_temp_mon_alarm(&mut self) {
self.temp_mon.clear_alarm();
}
pub fn get_temp_mon_settings(&mut self) -> TempMonSettings {
self.temp_mon.get_settings()
}
}
#[derive(Deserialize, Serialize, Copy, Clone, Debug, Tree)]
pub struct StatusReport {
ts: u32,
pid_engaged: bool,
temp_mon_status: TempStatus,
temperature: Option<ThermodynamicTemperature>,
i_set: ElectricCurrent,
tec_i: ElectricCurrent,