refactor: 去掉快速 IIR,ALFA_CAP1=79 @10ms (同步 DLD154V4B)
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@@ -30,8 +30,7 @@
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* 滤波参数 — M4 优化版 (V2.0+)
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* tick 提升到 10ms,滤波系数同步调整,保持等效时间常数
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*===========================================================================*/
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#define ALFA_CAP1 18 // IIR α = 18/256 ≈ 0.07 (@10ms → τ≈135ms, 等效 50ms 的 79/256)
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/* 快速 IIR (CAPVD_fast): α=128/256=0.5, τ≈28ms, 用 (old+new)/2 实现,无需宏 */
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#define ALFA_CAP1 79 // IIR α = 79/256 ≈ 0.31 (@10ms → τ≈32ms)
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#define MAX_SLOPE_RATE 5 // 斜率限幅: 单次最大变化 5%
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#define ENTRY_CONFIRM 3 // 进入确认: 连续 N 次低于阈值
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#define STABLE_SAMPLES 128 // 稳定期样本数
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@@ -102,11 +101,8 @@ typedef struct {
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uint16_t loop_dlt_ORG; // 当前灵敏度阈值
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uint8_t Flt_Reg; // IIR 滤波系数
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/*--- M4 优化 V2.0: 快速 IIR + 进入确认 ---*/
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uint32_t loop_CAPVD_fast; // 快速 IIR 值 (α=0.5, τ≈28ms)
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/*--- M4 优化: 进入确认 + 冻结超时 ---*/
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uint8_t loop_entry_cnt; // 进入确认计数
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/*--- M4 优化 V2.3~2.5: 基线冻结超时 ---*/
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uint16_t loop_freeze_cnt; // 冻结持续计数
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uint32_t loop_freeze_ref; // 冻结参考值
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@@ -110,7 +110,6 @@ void init_vd_single(Loop154_Unit *unit)
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unit->loop_SensLevel = 2; // 默认中灵敏度
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unit->Flt_Reg = ALFA_CAP1;
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unit->loop_CAPVD_fast = 0;
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unit->loop_entry_cnt = 0;
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unit->loop_freeze_cnt = 0;
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unit->loop_freeze_ref = 0;
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@@ -438,26 +437,12 @@ void vd1_task_per_channel(Loop154_Unit *unit)
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if (unit->loop_Origin == 0) return;
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/*================================================================
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* 1. 双路 IIR 滤波 (M4 优化 V2.0)
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*
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* 慢速 IIR (CAPVD): α=18/256 ≈ 0.07, τ≈135ms
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* - 斜率限幅: 单次变化 >5% → 截断 (拒绝 EMI/闪电尖峰)
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* - 用途: 基线跟踪
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*
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* 快速 IIR (CAPVD_fast): α=0.5, τ≈28ms
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* - 从斜率限幅后的 CAPVD 派生
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* - 用途: 进入/离开检测判定
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* 1. IIR 滤波 + 斜率限幅 (M4 优化)
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* ALFA_CAP1=79 @10ms → τ≈32ms
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*================================================================*/
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/* 1a. 慢速 IIR — 斜率限幅(参考 CAPVD)*/
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{
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uint32_t fast_input;
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if (unit->loop_CAPVD == 0) {
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unit->loop_CAPVD = unit->loop_Value;
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fast_input = unit->loop_Value;
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} else {
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/*--- 慢速路径:斜率限幅参考 CAPVD (τ=135ms),保护基线跟踪 ---*/
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int32_t raw_delta = (int32_t)unit->loop_Value - (int32_t)unit->loop_CAPVD;
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int32_t max_step = (int32_t)(unit->loop_CAPVD * MAX_SLOPE_RATE / 100);
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if (max_step < 100) max_step = 100;
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@@ -465,30 +450,11 @@ void vd1_task_per_channel(Loop154_Unit *unit)
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if (raw_delta < -max_step) raw_delta = -max_step;
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uint32_t clamped_value = (uint32_t)((int32_t)unit->loop_CAPVD + raw_delta);
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unit->loop_CAPVD = get_flt_value(clamped_value, unit->loop_CAPVD);
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/*--- 快速路径:斜率限幅参考 CAPVD_fast (τ=28ms),限幅窗口随快速值扩展 ---*/
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if (unit->loop_CAPVD_fast == 0) {
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fast_input = clamped_value;
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} else {
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int32_t f_delta = (int32_t)unit->loop_Value - (int32_t)unit->loop_CAPVD_fast;
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int32_t f_max = (int32_t)(unit->loop_CAPVD_fast * MAX_SLOPE_RATE / 100);
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if (f_max < 100) f_max = 100;
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if (f_delta > f_max) f_delta = f_max;
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if (f_delta < -f_max) f_delta = -f_max;
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fast_input = (uint32_t)((int32_t)unit->loop_CAPVD_fast + f_delta);
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}
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}
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/* 1b. 快速 IIR — α=0.5: (old + new) / 2 */
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if (unit->loop_CAPVD_fast == 0) {
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unit->loop_CAPVD_fast = fast_input;
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} else {
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unit->loop_CAPVD_fast = (unit->loop_CAPVD_fast + fast_input) / 2;
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}
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}
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/*--- 2. 稳定期:绕过 IIR 和斜率限幅 ---*/
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if (!unit->loop_stable) {
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unit->loop_CAPVD = unit->loop_Value;
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unit->loop_CAPVD_fast = unit->loop_Value;
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update_moving_average(&unit->loop_ORG_SUM, &unit->loop_ORG_CNT,
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&unit->loop_Origin, unit->loop_CAPVD, WINDOW_ORIGIN);
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@@ -505,33 +471,26 @@ void vd1_task_per_channel(Loop154_Unit *unit)
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* 无车状态
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*================================================================*/
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/*--- 基线跟踪(仿 TLD-110:有车时冻结)
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* 额外保护: CAPVD 异常上升时暂停跟踪,防止基线被污染 ---*/
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unit->loop_dlt_ORG = ((uint32_t)unit->loop_Origin * SensTable[unit->loop_SensLevel]) >> 16;
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{
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int32_t dev = (int32_t)unit->loop_CAPVD - (int32_t)unit->loop_Origin;
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if (dev < (int32_t)(unit->loop_dlt_ORG * 4)) {
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/* CAPVD 未显著高于基线 → 安全跟踪,重置冻结计数 */
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unit->loop_freeze_cnt = 0;
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update_moving_average(&unit->loop_ORG_SUM, &unit->loop_ORG_CNT,
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&unit->loop_Origin, unit->loop_CAPVD, WINDOW_ORIGIN);
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} else {
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/* CAPVD 异常偏高 → 冻结跟踪 */
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if (unit->loop_freeze_cnt == 0) {
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unit->loop_freeze_ref = unit->loop_CAPVD; // 记录冻结起始值
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unit->loop_freeze_ref = unit->loop_CAPVD;
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} else {
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/* 稳定性检查: CAPVD 偏离参考值超过 FREEZE_STABILITY_RATE% 则重置 */
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int32_t drift = (int32_t)unit->loop_CAPVD - (int32_t)unit->loop_freeze_ref;
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if (drift < 0) drift = -drift;
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if (drift > (int32_t)(unit->loop_freeze_ref * FREEZE_STABILITY_RATE / 100)) {
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/* 波动过大 → 不是稳定值,重置计数并以当前值重新计时 */
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unit->loop_freeze_cnt = 0;
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unit->loop_freeze_ref = unit->loop_CAPVD;
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}
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}
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unit->loop_freeze_cnt++;
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if (unit->loop_freeze_cnt >= FREEZE_TIMEOUT) {
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/* 超时: CAPVD 持续偏高且稳定 → 环境变化,接受新基线 */
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unit->loop_Origin = unit->loop_CAPVD;
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unit->loop_freeze_cnt = 0;
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unit->loop_freeze_ref = 0;
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@@ -540,26 +499,24 @@ void vd1_task_per_channel(Loop154_Unit *unit)
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PRINT("Loop%d Baseline timeout, new Origin:%d\n",
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unit->loop_num + 1, unit->loop_Origin);
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} else {
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/* 未超时: 保持冻结,重置累计(防止突然解冻时旧数据污染) */
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unit->loop_ORG_CNT = 0;
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unit->loop_ORG_SUM = 0;
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}
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}
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}
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/*--- M4 优化: 进入确认 — 连续 ENTRY_CONFIRM 次低于阈值才判有车
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* 使用快速 IIR (CAPVD_fast) 提高响应速度 ---*/
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if (unit->loop_CAPVD_fast < (unit->loop_Origin - unit->loop_dlt_ORG)) {
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/*--- 进入确认 — 连续 ENTRY_CONFIRM 次低于阈值 ---*/
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if (unit->loop_CAPVD < (unit->loop_Origin - unit->loop_dlt_ORG)) {
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unit->loop_entry_cnt++;
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if (unit->loop_entry_cnt >= ENTRY_CONFIRM) {
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PRINT("Loop%d Car_In, Value:%d CAPVD:%d CAPVD_fast:%d Origin:%d dlt:%d\n",
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PRINT("Loop%d Car_In, Value:%d CAPVD:%d Origin:%d dlt:%d\n",
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unit->loop_num + 1, unit->loop_Value, unit->loop_CAPVD,
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unit->loop_CAPVD_fast, unit->loop_Origin, unit->loop_dlt_ORG);
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unit->loop_Origin, unit->loop_dlt_ORG);
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unit->loop_VD_FLAG = 1;
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unit->loop_FLAG_IN = 1;
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unit->loop_entry_cnt = 0;
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unit->loop_freeze_cnt = 0; // 入场时重置冻结状态
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unit->loop_freeze_cnt = 0;
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unit->loop_freeze_ref = 0;
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if (unit->hold_time > 0) {
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unit->loop_VD_HOLD = 1;
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