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fix: 优化平滑逻辑

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This commit is contained in:
yarnom 2025-08-21 15:41:04 +08:00
parent c55f089247
commit cc5c607457
2 changed files with 124 additions and 55 deletions
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140
gin_server.go
View File

@ -149,86 +149,144 @@ func getDataHandler(c *gin.Context) {
hexID := fmt.Sprintf("%06X", decimalNum)
stationID := fmt.Sprintf("RS485-%s", hexID)
// 构建查询SQL
// 构建查询SQL（统一风向矢量平均，雨量为累计量的正增量求和）
var query string
switch interval {
case "10min":
query = `
WITH grouped_data AS (
WITH base AS (
SELECT
date_trunc('hour', timestamp) +
(floor(date_part('minute', timestamp) / 10) * interval '10 minute') as time_group,
date_trunc('hour', timestamp) + (floor(date_part('minute', timestamp) / 10) * interval '10 minute') as time_group,
timestamp as ts,
temperature, humidity, pressure, wind_speed, wind_direction, rainfall, light, uv
FROM rs485_weather_data
WHERE station_id = $1 AND timestamp BETWEEN $2 AND $3
),
rain_inc AS (
SELECT time_group, GREATEST(rainfall - LAG(rainfall) OVER (PARTITION BY time_group ORDER BY ts), 0) AS inc
FROM base
),
rain_sum AS (
SELECT time_group, SUM(inc) AS rainfall
FROM rain_inc
GROUP BY time_group
),
grouped_data AS (
SELECT
time_group,
AVG(temperature) as temperature,
AVG(humidity) as humidity,
AVG(pressure) as pressure,
AVG(wind_speed) as wind_speed,
AVG(wind_direction) as wind_direction,
MAX(rainfall) - MIN(rainfall) as rainfall,
DEGREES(ATAN2(AVG(SIN(RADIANS(wind_direction))), AVG(COS(RADIANS(wind_direction))))) AS wind_direction_raw,
AVG(light) as light,
AVG(uv) as uv
FROM rs485_weather_data
WHERE station_id = $1 AND timestamp BETWEEN $2 AND $3
FROM base
GROUP BY time_group
ORDER BY time_group
)
SELECT
to_char(time_group, 'YYYY-MM-DD HH24:MI:SS') as date_time,
temperature, humidity, pressure, wind_speed, wind_direction,
CASE WHEN rainfall < 0 THEN 0 ELSE rainfall END as rainfall,
light, uv
FROM grouped_data
ORDER BY time_group`
to_char(g.time_group, 'YYYY-MM-DD HH24:MI:SS') as date_time,
ROUND(g.temperature::numeric, 2) as temperature,
ROUND(g.humidity::numeric, 2) as humidity,
ROUND(g.pressure::numeric, 2) as pressure,
ROUND(g.wind_speed::numeric, 2) as wind_speed,
ROUND((CASE WHEN g.wind_direction_raw < 0 THEN g.wind_direction_raw + 360 ELSE g.wind_direction_raw END)::numeric, 2) AS wind_direction,
ROUND(COALESCE(r.rainfall, 0)::numeric, 3) as rainfall,
ROUND(g.light::numeric, 2) as light,
ROUND(g.uv::numeric, 2) as uv
FROM grouped_data g
LEFT JOIN rain_sum r ON r.time_group = g.time_group
ORDER BY g.time_group`
case "30min":
query = `
WITH grouped_data AS (
WITH base AS (
SELECT
date_trunc('hour', timestamp) +
(floor(date_part('minute', timestamp) / 30) * interval '30 minute') as time_group,
date_trunc('hour', timestamp) + (floor(date_part('minute', timestamp) / 30) * interval '30 minute') as time_group,
timestamp as ts,
temperature, humidity, pressure, wind_speed, wind_direction, rainfall, light, uv
FROM rs485_weather_data
WHERE station_id = $1 AND timestamp BETWEEN $2 AND $3
),
rain_inc AS (
SELECT time_group, GREATEST(rainfall - LAG(rainfall) OVER (PARTITION BY time_group ORDER BY ts), 0) AS inc
FROM base
),
rain_sum AS (
SELECT time_group, SUM(inc) AS rainfall
FROM rain_inc
GROUP BY time_group
),
grouped_data AS (
SELECT
time_group,
AVG(temperature) as temperature,
AVG(humidity) as humidity,
AVG(pressure) as pressure,
AVG(wind_speed) as wind_speed,
AVG(wind_direction) as wind_direction,
MAX(rainfall) - MIN(rainfall) as rainfall,
DEGREES(ATAN2(AVG(SIN(RADIANS(wind_direction))), AVG(COS(RADIANS(wind_direction))))) AS wind_direction_raw,
AVG(light) as light,
AVG(uv) as uv
FROM rs485_weather_data
WHERE station_id = $1 AND timestamp BETWEEN $2 AND $3
FROM base
GROUP BY time_group
ORDER BY time_group
)
SELECT
to_char(time_group, 'YYYY-MM-DD HH24:MI:SS') as date_time,
temperature, humidity, pressure, wind_speed, wind_direction,
CASE WHEN rainfall < 0 THEN 0 ELSE rainfall END as rainfall,
light, uv
FROM grouped_data
ORDER BY time_group`
to_char(g.time_group, 'YYYY-MM-DD HH24:MI:SS') as date_time,
ROUND(g.temperature::numeric, 2) as temperature,
ROUND(g.humidity::numeric, 2) as humidity,
ROUND(g.pressure::numeric, 2) as pressure,
ROUND(g.wind_speed::numeric, 2) as wind_speed,
ROUND((CASE WHEN g.wind_direction_raw < 0 THEN g.wind_direction_raw + 360 ELSE g.wind_direction_raw END)::numeric, 2) AS wind_direction,
ROUND(COALESCE(r.rainfall, 0)::numeric, 3) as rainfall,
ROUND(g.light::numeric, 2) as light,
ROUND(g.uv::numeric, 2) as uv
FROM grouped_data g
LEFT JOIN rain_sum r ON r.time_group = g.time_group
ORDER BY g.time_group`
default: // 1hour
query = `
WITH grouped_data AS (
WITH base AS (
SELECT
date_trunc('hour', timestamp) as time_group,
timestamp as ts,
temperature, humidity, pressure, wind_speed, wind_direction, rainfall, light, uv
FROM rs485_weather_data
WHERE station_id = $1 AND timestamp BETWEEN $2 AND $3
),
rain_inc AS (
SELECT time_group, GREATEST(rainfall - LAG(rainfall) OVER (PARTITION BY time_group ORDER BY ts), 0) AS inc
FROM base
),
rain_sum AS (
SELECT time_group, SUM(inc) AS rainfall
FROM rain_inc
GROUP BY time_group
),
grouped_data AS (
SELECT
time_group,
AVG(temperature) as temperature,
AVG(humidity) as humidity,
AVG(pressure) as pressure,
AVG(wind_speed) as wind_speed,
AVG(wind_direction) as wind_direction,
MAX(rainfall) - MIN(rainfall) as rainfall,
DEGREES(ATAN2(AVG(SIN(RADIANS(wind_direction))), AVG(COS(RADIANS(wind_direction))))) AS wind_direction_raw,
AVG(light) as light,
AVG(uv) as uv
FROM rs485_weather_data
WHERE station_id = $1 AND timestamp BETWEEN $2 AND $3
FROM base
GROUP BY time_group
ORDER BY time_group
)
SELECT
to_char(time_group, 'YYYY-MM-DD HH24:MI:SS') as date_time,
temperature, humidity, pressure, wind_speed, wind_direction,
CASE WHEN rainfall < 0 THEN 0 ELSE rainfall END as rainfall,
light, uv
FROM grouped_data
ORDER BY time_group`
to_char(g.time_group, 'YYYY-MM-DD HH24:MI:SS') as date_time,
ROUND(g.temperature::numeric, 2) as temperature,
ROUND(g.humidity::numeric, 2) as humidity,
ROUND(g.pressure::numeric, 2) as pressure,
ROUND(g.wind_speed::numeric, 2) as wind_speed,
ROUND((CASE WHEN g.wind_direction_raw < 0 THEN g.wind_direction_raw + 360 ELSE g.wind_direction_raw END)::numeric, 2) AS wind_direction,
ROUND(COALESCE(r.rainfall, 0)::numeric, 3) as rainfall,
ROUND(g.light::numeric, 2) as light,
ROUND(g.uv::numeric, 2) as uv
FROM grouped_data g
LEFT JOIN rain_sum r ON r.time_group = g.time_group
ORDER BY g.time_group`
}
// 执行查询

39
web_server.go
View File

@ -112,12 +112,13 @@ func getStationData(w http.ResponseWriter, r *http.Request) {
intervalSQL = "1 hour"
}
// 构建查询SQL - 使用时间窗口聚合
// 构建查询SQL - 使用时间窗口聚合（风向矢量平均，雨量按累计量正增量求和）
query = fmt.Sprintf(`
WITH time_series AS (
SELECT
date_trunc('hour', timestamp) +
INTERVAL '%s' * FLOOR(EXTRACT(EPOCH FROM timestamp - date_trunc('hour', timestamp)) / EXTRACT(EPOCH FROM INTERVAL '%s')) as time_bucket,
timestamp as ts,
temperature,
humidity,
pressure,
@ -131,6 +132,17 @@ func getStationData(w http.ResponseWriter, r *http.Request) {
AND timestamp >= $2::timestamp
AND timestamp <= $3::timestamp
),
rain_increments AS (
SELECT
time_bucket,
GREATEST(rainfall - LAG(rainfall) OVER (PARTITION BY time_bucket ORDER BY ts), 0) AS inc
FROM time_series
),
rain_sums AS (
SELECT time_bucket, SUM(inc) AS rainfall
FROM rain_increments
GROUP BY time_bucket
),
aggregated_data AS (
SELECT
time_bucket,
@ -149,25 +161,24 @@ func getStationData(w http.ResponseWriter, r *http.Request) {
)) < 0 THEN 360
ELSE 0
END, 2) as wind_direction,
-- 雨量使用差值计算
ROUND((MAX(rainfall) - MIN(rainfall))::numeric, 3) as rainfall_diff,
ROUND(AVG(light)::numeric, 2) as light,
ROUND(AVG(uv)::numeric, 2) as uv
FROM time_series
GROUP BY time_bucket
)
SELECT
time_bucket,
COALESCE(temperature, 0) as temperature,
COALESCE(humidity, 0) as humidity,
COALESCE(pressure, 0) as pressure,
COALESCE(wind_speed, 0) as wind_speed,
COALESCE(wind_direction, 0) as wind_direction,
COALESCE(rainfall_diff, 0) as rainfall,
COALESCE(light, 0) as light,
COALESCE(uv, 0) as uv
FROM aggregated_data
ORDER BY time_bucket`, intervalSQL, intervalSQL)
ad.time_bucket as time_bucket,
COALESCE(ad.temperature, 0) as temperature,
COALESCE(ad.humidity, 0) as humidity,
COALESCE(ad.pressure, 0) as pressure,
COALESCE(ad.wind_speed, 0) as wind_speed,
COALESCE(ad.wind_direction, 0) as wind_direction,
COALESCE(rs.rainfall, 0) as rainfall,
COALESCE(ad.light, 0) as light,
COALESCE(ad.uv, 0) as uv
FROM aggregated_data ad
LEFT JOIN rain_sums rs ON rs.time_bucket = ad.time_bucket
ORDER BY ad.time_bucket`, intervalSQL, intervalSQL)
rows, err := db.Query(query, stationID, startTime, endTime)
if err != nil {