NB/T 10215-2019Wind turbines - Wind measuring sensors (English PDF)

4.1 Classification

Sensors are divided into. rotary wind speed sensor, rotary wind direction sensor, ultrasonic sensor.

4.2 Composition

4.2.1 The rotary wind speed sensor is generally composed of a rotating body, a main body, a heating module, a signal conversion module, and a base.

4.2.2 Rotary wind direction sensor is generally composed of rotating body, main body, heating module, signal conversion module, base, N pole and S pole mark, etc. to make.

4.2.3 Ultrasonic sensors are generally composed of wind measurement cavity, base, main control module, heating module, signal conversion module, and ultrasonic transducer module. Blocks and other components.

5.1 Appearance and structure

The surface of the sensor should be smooth, free from damage, deformation, and coating. The components, parts and parts should be firmly connected, and the mechanical parts table The surface shall be free of burrs and corrosion, and there shall be no defects such as cracks and wrinkles in the bending part. Product trademarks and imprints should be complete, clear and firm, and the wind direction The N pole and S pole of the sensor should be marked in a prominent position.

The rotating parts of the sensor should rotate flexibly without jamming or abnormal noise. The rotating parts should not have obvious axial beating or radial swing.

5.2 Interchangeability

The sensor component units of the same model shall be interchangeable.

5.3 Technical parameters

5.3.1 The technical parameters of the rotary wind speed sensor are as follows.

5.3.2 The technical parameters of the rotary wind direction sensor are as follows.

5.3.3 The technical parameters of ultrasonic sensors are as follows.

5) Refresh cycle. <=250 ms.

5.4 Environmental adaptability

5.4.1 Power adaptability

The sensor should be able to work normally within the operating voltage range of DC18 V to 30 V.

5.4.2 Wind resistance

The sensor should be able to maintain no damage for 30 s under the upper limit of the measuring range 120% wind speed, when the upper limit of the measuring range 120% wind speed exceeds 80 m/s When the test is performed at a wind speed of 80 m/s.

5.4.3 Temperature

The sensor should be able to work normally within the working environment temperature range of -40 °C to 60 °C.

5.4.4 Humidity

The sensor should be able to work normally within the working environment humidity range of 0% RH to 100% RH.

5.4.5 Aging

The sensor is aging at 55 °C for 72 hours under power-on state, and after continuous low-temperature aging at -5 °C for 16 hours, the output signal is normal.

5.4.6 Melting ice

Sensors with anti-icing function, in accordance with the requirements of the severity level in GJB 150.22A. Class B or Class C (selected according to the use environment Severity level). When the sensor is energized to start the ice melting function, the 13 mm or 37 mm thick icing on its surface can be kept at -10 °C for 25 min or Melt within 40 minutes, the rotating parts should be flexible, and the output signal should be normal.

5.4.7 Freezing rain

The sensor with anti-freeze function, according to the severity level of GJB 150.22A. ambient temperature -10 °C, water temperature 0 °C ~ 3 °C, drop The water rate is 25 mm/h. When the sensor is energized in a freezing rain environment, the rotating parts should be flexible, and there should be no ice such as floating ice or frost. Like, the output signal is normal.

5.4.8 Hail

According to the requirements of GB/T 33235, the sensor should be able to resist the impact of hail with a diameter of 25 mm and a mass of 7.53 g at a speed of 23 m/s. The structure should be free from cracks, deformation and loosening.

5.4.9 Getting in the rain

The sensor is in accordance with the method Ra1 in GB/T 2423.38, severity level. rain intensity 100 mm/h, duration 60 min, tilt angle 0° Requirements. The output signal is normal in a rainy environment.

5.4.10 Salt fog

The sensor is in accordance with the requirements of GB/T 2423.17 according to different anti-corrosion capabilities. Severity level with duration. 480 h, 720 h, 1440 h (Offshore) One of the three grades (determined by the supplier and the buyer through negotiation) after the test, rinse with tap water and let it dry. Visual inspection should be free of corrosion Eclipse products.

5.4.11 Solar radiation

The sensor is in accordance with the requirements of procedure B in GB/T 2423.24. After the test, the structure should be free of cracks, deformations and looseness, and it is energized for inspection The output signal should be normal.

5.4.12 Low air pressure

The sensor is in accordance with the requirements of the test method in GB/T 2423.21, in an environment with an atmospheric pressure of 60 kPa (an altitude of about 4000 m)

Next, power on and check that the output signal should be normal.

5.4.13 Vibration

5.4.13.1 According to the requirements of GB/T 2423.10, the frequency range is 1 Hz~100 Hz; the amplitude is 0.75 mm; the number of cycles is 5.

After the inspection, the structure should be free of cracks, deformations and looseness, and the output signal should be normal when the power is on.

5.4.13.2 The sensor is in accordance with the requirements of GB/T 2423.56 Vibration Test Method. 2.After the test, the structure should be free of cracks, deformation and looseness. Power-on inspection output signal should be normal.

5.4.14 Sand and dust

The sensor is in accordance with the test method in GB/T 2423.37. Lc1.After the test, the rotating parts should be flexible and there should be no dust in the shell Dust, power-on inspection output signal should be normal.

5.4.15 Impact

The sensor package is in accordance with the requirements of 150 m/s² peak acceleration and 11 ms pulse duration in GB/T 2423.5. After the test, the sensor The structure of the device has no cracks, deformations or looseness, and the output signal should be normal when the power is on.

5.4.16 Collision

The sensor package is in accordance with the severity level in GB/T 2423.6.peak acceleration 250 m/s², pulse duration 6 ms, three directions 1,000 times each. After the test, the sensor structure has no cracks, deformations or looseness, and the output signal should be normal when the power is turned on.

5.4.17 Drop

The sensor package should meet the requirements of the package falling from a height of 1 m in GB/T 2423.8, and the sensor structure should not be broken, deformed or loose.

If the power is on, the output signal should be normal.

5.4.18 Degree of protection

5.4.18.1 The sensor shall comply with the requirements of the first characteristic number 6 of IP in GB/T 4208. Carry out dustproof test, after the test, according to GB/T 4208 If there is no obvious dust deposition in the sensor housing, the test is considered qualified.

5.4.18.2 The sensor shall comply with the requirements of the second characteristic number 5 of IP in GB/T 4208. Carry out waterproof test, after the test, in accordance with GB/T 4208 If there is no obvious water deposit in the sensor housing, the test is considered qualified.

5.4.19 Electromagnetic compatibility

The electromagnetic compatibility of the sensor should meet the following requirements.

a) The sensor is in accordance with the electrostatic discharge immunity test of the severity level 4 in GB/T 17626.2, and it is normal in the disturbance or the disturbance stops Return to normal afterwards;

b) The sensor is tested in accordance with the radio frequency electromagnetic field radiation immunity test of the severity level 3 in GB/T 17626.3, and it is normal or disturbed in the disturbance. After the disturbance ceases to return to normal;

c) The sensor is in accordance with the electrical fast transient pulse group immunity test of the severity level 3 in GB/T 17626.4, and it is normal or Return to normal after the harassment ceases;

d) According to the surge immunity test of severity level 4 in GB/T 17626.5, the sensor is normal in the disturbance or after the disturbance stops. Back to normal;

e) The sensor is in accordance with the immunity test of conducted disturbance induced by the radio frequency field of severity level 3 in GB/T 17626.6, and it is normal in disturbance Or return to normal after the harassment ceases;

f) The sensor is tested in accordance with the power frequency magnetic field immunity test of the severity level 3 in GB/T 17626.8. It is normal in the disturbance or after the disturbance stops. Return to normal on its own.

6.1 Visual inspection

Through actual operation visual inspection or inspection and verification of measuring equipment.

6.2 Interchangeability test

Replace the various parts of the sensor. After assembly, the technical parameters should meet the requirements.

6.3 Technical parameter inspection

6.3.1 The technical parameter inspection of the rotary wind speed sensor includes the following contents.

a) Test of measurement range and maximum allowable error. install the wind speed sensor in the test section of the wind tunnel, select seven tests within the measurement range Inspection points (recommended values 3 m/s, 5 m/s, 10 m/s, 15 m/s, 20 m/s, 25 m/s, 30 m/s) and the upper limit of the measurement range After the wind speed in the wind tunnel is stable at each inspection point, read the three-time average of the difference between the wind speed value output by the sensor and the wind speed value in the wind tunnel That is the maximum allowable error;

b) Starting wind speed inspection. install the wind speed sensor in the test section of the wind tunnel, start the wind tunnel, gradually increase the wind speed from zero, and record the wind speed The wind tunnel indicates the wind speed when the sensor starts and continues to rotate, repeat three times, and use the arithmetic average as the starting wind speed;

c) Resolution test. Observe the difference of the last value of the sensor display device;

d) Refresh cycle inspection. Use an oscilloscope to measure the refresh cycle of the output signal.

6.3.2 The technical parameter inspection of the rotary wind direction sensor includes the following contents.

a) There are two methods for measuring range and maximum allowable error inspection.

1) Method 1.Install the wind direction sensor in the wind tunnel, start the wind tunnel, set the wind speed to 5 m/s, set the sensor to zero, and use the servo The servo motor rotates the sensor angle to 30°, 60°, 90°, 120°, 150°, 180°, 210°, 240°, 270°, 300°, 330°, 0°, read the maximum value of the difference between the sensor output angle value and the servo motor angle value is the maximum Large allowable error;

2) Method 2.Install the wind direction sensor in the center of the standard dial, adjust the tip of the wind vane to 0° of the dial, and make the sensor The output signal is 0°, and the tip of the wind vane points to 30°, 60°, 90°, 120°, 150°, 180°, 210°, 240°, 270°, 300°, 330°, 0°, read sensor output value and convert it into angle value and standard dial angle value The maximum value of the difference is the maximum allowable error.

b) Start-up wind speed inspection. install the wind direction sensor in the wind tunnel, and adjust the angle of the wind vane of the sensor to be 30° 330°, start the wind tunnel, gradually increase the wind speed from zero, and record the wind speed of the wind tunnel when the sensor starts to rotate and turn to within ±5° Value, repeat three times, and take the arithmetic mean as the starting wind speed;

c) Resolution test. Observe the difference of the last value of the sensor display device;

d) Refresh cycle inspection. use an oscilloscope to measure the refresh cycle of the output signal.

6.3.3 The technical parameter inspection of ultrasonic sensors includes the following.

a) Wind speed measurement range and maximum allowable error check. point the N pole or S pole mark of the sensor to the windward side, and select within the measurement range Take seven test points (recommended values 3 m/s, 5 m/s, 10 m/s, 15 m/s, 20 m/s, 25 m/s, 30 m/s) and measure The upper limit point of the range. After the wind speed of the wind tunnel is stabilized at each inspection point, read the three averages of the difference between the sensor wind speed value and the wind speed value of the wind tunnel The value is the maximum allowable error;

b) Wind direction measurement range and maximum allowable error check. install the sensor in the wind tunnel, start the wind tunnel, set the wind tunnel wind speed to 5 m/s, Initialize the wind direction motor position first, adjust the sensor angle close to 0°, and use the servo motor to rotate the sensor angle to, 30°, 60°, 90°, 120°, 150°170°, 175°, 180°, 185°, 190°, 210°, 240°, 270°, 300°, 330°, 0°, the maximum value of the difference between the angle value of the sensor and the angle value of the servo motor is the maximum allowable error;

c) Resolution test. Observe the difference of the last value of the sensor display device;

d) Refresh cycle inspection. use an oscilloscope to measure the refresh cycle of the output signal.

6.4 Environmental adaptability test

6.4.1 Power adaptability

Use an adjustable regulated power supply to supply power to the sensor, so that the input operating voltage changes within the range of DC18 V to 30 V, and the sensor should be able to work normally. Made.

6.4.2 Wind resistance

Fix the sensor in the wind tunnel test section, and adjust the wind tunnel to a wind speed value of 120% of the upper limit of the wind speed measurement range of the sensor (when the wind speed value exceeds 80 When m/s, the test is carried out at a wind speed of 80 m/s and maintained for 30 s.

6.4.3 Temperature adaptability

6.4.3.1 According to GB/T 2423.1, place the sensor in a high and low temperature test box, energize the sensor, start the test box, and set the temperature to -40 °C, Keep for 16 h.

6.4.3.2 According to GB/T 2423.2, place the sensor in the high and low temperature test box, power on the sensor, start the test box, and set the temperature to Keep at 60 °C for 16 h.

6.4.4 Humidity adaptability

According to GB/T 2423.3, place the sensor in the high and low temperature alternating damp heat test box, power on the sensor, start the test box, and set the temperature Set it to 30 °C, set the humidity to 95% RH, and keep it for 12 hours.

6.4.5 Aging test

Install the sensor in the high and low temperature test box according to the energized state, start the test box, set the temperature to 55 °C and run for 72 hours, then continue the test The temperature in the test box was set to -5 °C and operated for 16 h.

6.4.6 Melting ice test

According to the test level of GJB 150.22A. Class B or Class C, place the sensor in the ice water spray test box, and set the temperature inside the box to -10 °C, the setting value of ice water temperature is 0 °C~3 °C, spray it when the sensor is not energized to make the sensor surface freeze about 13 mm or 37 mm thickness, keep the air temperature in the test chamber for at least 4 h to harden the ice, activate the sensor melting function, and record the melting time of the ice between.

6.4.7 Freezing rain test

According to GJB 150.22A, place the sensor in the ice water spray test box, set the temperature to -10 °C or other specified temperature, ice The water set value is 0 °C~3 °C, spray it when the sensor is energized and heated. Spray time is 1 h.

6.4.8 Hail test

According to GB/T 33235, the sensor should be able to pass the hail test of the following severity levels.

Fix the sensor on the hail impact tester, and adjust the parameters according to the above regulations to test.

6.4.9 Rain test

According to GB/T 2423.38, the sensor should be able to pass the following severe tests.

Fix the sensor on the test equipment according to the energized use state, and adjust the parameter test according to the above regulations.

6.4.10 Salt spray test

According to GB/T 2423.17, the sensor should be able to pass the following severe tests.

--Salt solution concentration. (5±1)%;

--Temperature. 35 °C±2 °C;

--Duration (h). 480, 720, 1440, (one of the time is determined by both parties through negotiation).

Put the sensor into the salt spray test box, and adjust the test box according to the above specified parameters to test.

6.4.11 Solar radiation test

According to GB/T 2423.24, the sensor should be able to pass the following radiation type tests.

--Test procedure. B;

--Irradiance. Xenon arc lamp irradiates 1120 W/m2;

--Temperature in the test chamber. T1 25°, T2 40°;

--Duration. 24 h is a cycle, irradiated for 20 h, stopped for 4 h, and repeated 3 times.

Place the sensor in the radiation test box, and adjust the parameters according to the above regulations to test.

6.4.12 Low air pressure test

According to GB/T 2423.21, the sensor should be able to pass the following severe low-pressure test.

--Air pressure. 60 kPa;

- Duration. 4 h.

Install the sensor in the air pressure test box, make the sensor in the energized working state, adjust the parameters according to the above regulations to test.

6.4.13 Vibration test

The sensor vibration test includes the following.

a) According to GB/T 2423.10, perform sinusoidal vibration of the sensor with the following parameters.

--Frequency range. 1 Hz~100 Hz;

--Amplitude. 0.75 mm;

--Sweep frequency. 1 oct/min;

- Scanning cycles. 5 times.

b) Perform random vibration according to GB/T 2423.56 (Method 2).

--Frequency range. 1 Hz~100 Hz;

--Spectral density. (0.1 m/s²)²/Hz;

--Duration. 90 min (30 min in each of the three directions).

Place the sensor on the vibration test bench and adjust the parameters according to the above regulations to test.

6.4.14 Sand and dust test

According to GB/T 2423.37, perform the following sand and dust test on the sensor.

--Test method. Lc1;

--Sand dust concentration. 2 g/m³±0.5 g/m³;

--Air velocity. 3.0 m/s±0.3 m/s;

--Air pressure. atmospheric pressure;

- Duration. 8 h.

Put the sensor in the sand and dust test box according to the normal use position, and adjust the parameters according to the above regulations to test.

6.4.15 Impact test

According to GB/T 2423.5, the following impact tests are carried out on the sensor package.

--Peak acceleration. 150 m/s²;

--Pulse shape. half sine;

--Pulse duration. 11 ms;

--Number of impacts. 3 times in each of the three directions.

Place the sensor package on the impact testing machine and adjust the parameters according to the above regulations to test.

6.4.16 Crash test

According to GB/T 2423.6, the following collision tests are carried out on the sensor package.

--Peak acceleration. 250 m/s²;

--Duration. 6 ms; […]