[0051] Example 1
[0052] refer to Figure 1 to Figure 5 , the first embodiment provides a flue flow field measurement device, the flue flow field measurement device includes a streamlined casing 101, the head end of the streamlined casing 101 is connected to a traction rope 103; The sensor 105, the acquisition control circuit 106 and the wireless transmission module 107; the differential pressure sensor 104 is used to acquire the differential pressure signal of the airflow, the differential pressure sensor 104 is electrically connected with the acquisition control circuit 106, and the acquisition control circuit 106 is used to calculate the differential pressure signal Converted into a wind speed signal; the attitude sensor 105 is used to calculate the three-dimensional attitude signal of the flue flow field measurement device in the flue through the three-axis acceleration value and the angular velocity value, the attitude sensor 105 is electrically connected with the acquisition control circuit 106, and the acquisition control circuit 106 passes through The calculation is used to convert the three-dimensional attitude signal into a three-dimensional coordinate signal; the acquisition control circuit 106 is connected to the wireless transmission module 107 to transmit the wind speed signal and the three-dimensional coordinate signal to the analysis system, and display it through images.
[0053] During measurement, the measurement device 10 is hoisted on one of the intersections 201 of the measurement grid 20 by the traction rope 103 . Under the action of the wind force, the traction rope 103 and the measurement device 10 , the measurement device 10 can present an approximate parallel airflow. Attitude; since the interior of the streamlined casing 101 is provided with a differential pressure sensor 104, an attitude sensor 105, a collection control circuit 106 and a wireless transmission module 107, the differential pressure sensor 104 can obtain the differential pressure signal of the airflow, and the differential pressure sensor 104 and the acquisition control circuit 106 Electrically connected, the acquisition control circuit 106 can convert the differential pressure signal into a wind speed signal by calculating; the attitude sensor 105 can calculate the three-dimensional attitude signal of the flue flow field measuring device in the flue through the three-axis acceleration value and angular velocity value. The acquisition control circuit 106 is electrically connected, and the acquisition control circuit 106 can convert the three-dimensional attitude signal into a three-dimensional coordinate signal through calculation; the acquisition control circuit 106 is connected to the wireless transmission module 107, and can transmit the wind speed signal and the three-dimensional coordinate signal to the analysis system, and through the image to show. It can be seen that the flue flow field measurement device and the flue flow field measurement method can not only measure the wind speed of the air flow, but also the flow direction of the air flow, so that the real flow field of the flue can be restored to the maximum extent; The flue flow field measuring device and the flue flow field measuring method are safe and easy to implement.
[0054] It should be noted that the above-mentioned "approximately parallel" means that the posture of the measuring device 10 and the airflow may be parallel in a strict sense, or may be approximately parallel, and there may be a certain deviation in the parallelism between the two.
[0055] Specifically, the acquisition control circuit 106 is connected to the differential pressure sensor 104 and the attitude sensor 105, collects differential pressure information and attitude information, and performs preliminary processing on the data. The acquisition control circuit 106 is connected to the wireless transmission module 107 through a serial port.
[0056] Further, the tail end of the streamlined housing 101 is provided with a tail fin 102, which can enhance the stability of the entire measurement device 10 and avoid large fluctuations in data when collecting data.
[0057] refer to figure 1 , the interior of the streamlined casing 101 is also provided with a power supply battery 108, and the power supply battery 108 is connected to the acquisition control circuit 106 for supplying power to the flue flow field measurement device.
[0058] In this embodiment, the differential pressure sensor 104 includes two ports, one of which is disposed toward the windward side, and the other port is disposed toward the leeward side.
[0059] combine figure 1 and Figure 4 , the differential pressure sensor 104 has two upper and lower ports, the upper port is arranged toward the windward side, and the lower port is arranged toward the leeward side.
[0060] Specifically, the differential pressure sensor 104 is a digital differential pressure sensor. The two pressures of the measured medium of the differential pressure sensor pass into the high and low pressure chambers, and act on the isolation diaphragms on both sides of the delta sensitive element. The filling liquid in the sheet and the element is sent to both sides of the measuring diaphragm, the measuring diaphragm and the electrodes on the insulating sheets on both sides form a capacitor, and the pressure difference between the two air inlets is measured through the change of the capacitance value.
[0061] Please continue to refer to figure 1 , the streamlined shell 101 includes a first section, a middle section and a tail section; the lateral size of the first section is gradually increased from front to back; the lateral size of the middle section remains unchanged from front to back; the lateral size of the tail section is from front to back. Decrease the setting gradually, so that the flue flow field measuring device can maintain a stable attitude under the action of wind.
[0062] The tail fin 102 is connected to the tail section of the streamlined casing 101 .
[0063] refer to figure 2 and image 3 , the flue flow field measurement device also includes a measurement grid 20; the measurement grid 20 includes a plurality of intersections 201; during measurement, the traction rope 103 is connected to one of the intersections 201; , the number of points can be increased or decreased arbitrarily.
[0064] In an embodiment of the present application, the measurement grid 20 is constructed by interweaving a plurality of iron wires in a mesh shape.
[0065] refer to Figure 5 , During the measurement, the measurement grid 20 is arranged between 1 and 2 m above the catalyst 30 of the SCR device. The purpose of this is that after the airflow encounters the catalyst, due to the resistance of the catalyst, an unstable flow field will be generated above the catalyst. Affect the measurement results, so the measurement is arranged at 1~2m above the catalyst.
[0066] Exemplarily, the measurement grid 20 is arranged 1.1 m, 1.2 m, 1.3 m, 1.4 m, 1.5 m, 1.6 m, 1.7 m, 1.8 m, 1.9 m or 2 m above the SCR device catalyst 30 .
[0067] In summary, the measurement process of the flue flow field measurement device is as follows:
[0068] Use the traction rope 103 to hoist the measuring device 10 to the corresponding intersection 201 of the measuring grid 20. After arranging the measuring points, start the fan and wait for the wind speed to stabilize. Under the action of the wind, the measuring device 10 will basically remain in the direction of the airflow. a stable posture;
[0069] The acquisition control circuit 106 is connected to the wireless transmission module 107, and can transmit the wind speed signal and the three-dimensional coordinate signal to the analysis system, and display it through images.
