Flue gas ultrasonic flowmeter probe self-positioning measurement system

Abstract

The utility model provides a flue gas ultrasonic flowmeter probe self-positioning measuring system, which comprises two connecting flanges, an ultrasonic transmitting probe and an ultrasonic receiving probe, the two connecting flanges are respectively connected with two detection flange openings, the inner side of each connecting flange is respectively connected with a multi-degree-of-freedom motor, and the ultrasonic transmitting probe is connected with the ultrasonic receiving probe. Wherein an output shaft of one multi-degree-of-freedom motor is connected with the ultrasonic transmitting probe, and an output shaft of the other multi-degree-of-freedom motor is connected with the ultrasonic receiving probe; the measuring system further comprises a data acquisition system, the two connecting flanges are respectively provided with threading holes, and data lines of the ultrasonic transmitting probe, the ultrasonic receiving probe and the two multi-degree-of-freedom motors penetrate through the threading holes to be connected with the data acquisition system. When the two probes deviate relatively due to vibration of the flue, the relative positions of the ultrasonic transmitting probe and the ultrasonic receiving probe are automatically adjusted through the multi-degree-of-freedom motor, it is guaranteed that the ultrasonic pulse intensity is at a high level, and the detection precision is improved.

Description

Technical Field

[0001] This utility model relates to the field of measuring equipment technology, and in particular to a self-positioning measurement system for a flue gas ultrasonic flow meter probe. Background Technology

[0002] Currently, there are two main methods for calculating greenhouse gas emissions: the accounting method and the measurement method. The accounting method calculates greenhouse gas emissions primarily by the amount of fuel burned, while the measurement method directly measures emissions using a CEMS (Continuous Electromagnetic Monitoring System). The CEMS method directly measures parameters such as flue gas velocity, CO2 concentration, and humidity to obtain greenhouse gas emissions, with flue gas velocity directly affecting the carbon emission measurement results. Data from actual measurements using a CEMS system is expected to serve as a valuable reference for carbon emission monitoring. Therefore, accurate measurement of flue gas velocity is of great significance for carbon emission monitoring and carbon emission trading.

[0003] Flue gas velocity testing typically employs methods such as Pitot tube flow meters, matrix flow meters, thermal flow meters, and ultrasonic flow meters. Among these, ultrasonic flow meters measure gas velocity by exploiting the time difference in ultrasonic pulse delay. The transmitting and receiving devices are installed on opposite sides of the measuring pipe, at a specific angle to the gas flow direction. Due to the gas velocity, there is a time difference in the propagation of ultrasonic waves in the forward and reverse directions. Therefore, based on this time difference, the pipe diameter, and the installation location, the gas velocity can be calculated, and consequently, the gas flow rate.

[0004] The ultrasonic flow meter is installed on the opposite side of the inclined direction of the flue. Generally, the flue requires a fan to blow air, which causes a lot of vibration. The ultrasonic flow meter probe is prone to displacement, which causes the ultrasonic pulse transmission and reception to be out of line, thus affecting the measurement accuracy, or even failing to receive a signal and making it impossible to measure. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a self-positioning measurement system for a flue gas ultrasonic flow meter probe, which can adjust the relative position of the ultrasonic transmitting probe and the ultrasonic receiving probe according to the difference in ultrasonic pulse intensity.

[0006] This utility model is implemented as follows:

[0007] This utility model provides a self-positioning measurement system for an ultrasonic flow meter probe for flue gas. Two detection flanges are opened on the wall of the flue pipe, located on opposite sides of the flue. The measurement system includes two connecting flanges, an ultrasonic transmitting probe, and an ultrasonic receiving probe. The two connecting flanges are connected to the two detection flanges respectively. A multi-degree-of-freedom motor is connected to the inner side of each connecting flange. The output shaft of one multi-degree-of-freedom motor is connected to the ultrasonic transmitting probe, and the output shaft of the other multi-degree-of-freedom motor is connected to the ultrasonic receiving probe.

[0008] The measurement system also includes a data acquisition system. The two connecting flanges are respectively provided with wire holes, through which the data lines of the ultrasonic transmitting probe, the ultrasonic receiving probe, and the two multi-degree-of-freedom motors pass and are connected to the data acquisition system.

[0009] Furthermore, the ultrasonic transmitting probe and the ultrasonic receiving probe are cylindrical, and the ultrasonic transmitting probe and the ultrasonic receiving probe are respectively provided with grooves on the side facing the multi-degree-of-freedom motor, and the output shaft of the multi-degree-of-freedom motor is interference-fitted into the corresponding grooves.

[0010] Furthermore, the data acquisition system includes at least a data acquisition module for acquiring ultrasonic pulse intensity. The data acquisition module is connected to an ultrasonic transmitting probe and an ultrasonic receiving probe, respectively. The data acquisition module is connected to a main control module, and the main control module is connected to a control module for controlling the motion of a multi-degree-of-freedom motor.

[0011] The advantages of this invention are: the measurement system can automatically position the ultrasonic transmitting probe and the ultrasonic receiving probe. When the two probes are offset relative to each other due to flue vibration, the relative positions of the ultrasonic transmitting probe and the ultrasonic receiving probe are automatically adjusted by a multi-degree-of-freedom motor to ensure that the ultrasonic pulse intensity is at a high level and improve the detection accuracy. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0013] Figure 1 This is a schematic diagram of the structure of a self-positioning measurement system for an ultrasonic flow meter probe for flue gas according to this utility model.

[0014] Figure 2 This is a schematic diagram showing the connection between the data acquisition system of this utility model and the ultrasonic transmitting probe, the ultrasonic receiving probe, and the multi-degree-of-freedom motor.

[0015] Explanation of the labels in the diagram:

[0016] 1. Flue; 11. Inspection flange; 2. Connecting flange; 21. Wiring hole; 3. Ultrasonic transmitting probe; 4. Ultrasonic receiving probe; 5. Multi-degree-of-freedom motor; 6. Data acquisition system; 61. Data acquisition module; 62. Main control module; 63. Control module. Detailed Implementation

[0017] Please see Figures 1 to 2 This utility model provides a self-positioning measurement system for an ultrasonic flow meter probe for flue gas. Two detection flanges 11 are opened on the wall of the flue duct 1, located on opposite sides of the flue duct 1. The measurement system includes two connecting flanges 2, an ultrasonic transmitting probe 3, and an ultrasonic receiving probe 4. The two connecting flanges 2 are connected to the two detection flanges 11 respectively. Each connecting flange 2 is connected to the detection flange 11 by six bolts. A multi-degree-of-freedom motor 5 is connected to the inner side of each connecting flange 2. The multi-degree-of-freedom motor 5 is a motor whose output shaft can move in multiple degrees of freedom. The output shaft of one multi-degree-of-freedom motor 5 is connected to the ultrasonic transmitting probe 3, and the output shaft of the other multi-degree-of-freedom motor 5 is connected to the ultrasonic receiving probe 4.

[0018] The measurement system also includes a data acquisition system 6. The two connecting flanges 2 are respectively provided with wire holes 21. The data lines of the ultrasonic transmitting probe 3, the ultrasonic receiving probe 4 and the two multi-degree-of-freedom motors 5 pass through the wire holes 21 and are connected to the data acquisition system 6.

[0019] Specifically, the ultrasonic transmitting probe 3 and the ultrasonic receiving probe 4 are cylindrical, and the ultrasonic transmitting probe 3 and the ultrasonic receiving probe 4 are respectively provided with grooves 7 on the side facing the multi-degree-of-freedom motor 5. The output shaft of the multi-degree-of-freedom motor 5 is interference-fitted into the corresponding grooves 7.

[0020] Specifically, the data acquisition system 6 includes at least a data acquisition module 61 for acquiring the intensity of ultrasonic pulses. The data acquisition module 61 is connected to both the ultrasonic transmitting probe 3 and the ultrasonic receiving probe 4. The data acquisition module 61 is connected to a main control module 62, and the main control module 62 is connected to a control module 63 for controlling the movement of the multi-degree-of-freedom motor 5. The data acquisition module 61 acquires the intensity V of the ultrasonic pulses emitted from the ultrasonic transmitting probe 3. P发 and the intensity V of the ultrasonic pulse received from the ultrasonic receiving probe 4 P接 The data is then transmitted to the main control module 62, which has a preset ultrasonic pulse intensity V. P发 With ultrasonic pulse intensity V P接The pulse intensity difference threshold is determined. Once the pulse intensity difference between the two reaches the threshold, the control module 63 controls the output shaft of the multi-degree-of-freedom motor 5 to move, thereby adjusting the ultrasonic transmitting probe 3 and the ultrasonic receiving probe 4 to their initial positions (i.e., the ultrasonic transmitting probe 3 and the ultrasonic receiving probe 4 are on the same straight line).

[0021] The data acquisition module 61 is also used to obtain the propagation time of ultrasonic waves in the downstream and upstream directions of the gas, and the main control module 62 calculates the flow velocity of the flue gas based on the time difference of ultrasonic wave propagation in the downstream and upstream directions of the flue gas.

[0022] One specific application of this utility model is:

[0023] (1) Connect the ultrasonic transmitting probe 3 and the ultrasonic receiving probe 4 to the multi-degree-of-freedom motor 5 respectively, and fix the two multi-degree-of-freedom motors 5 on the connecting flange 2 respectively.

[0024] (2) Then, the connecting flange 2 is installed at the corresponding test flange port 11 and fixed with bolts.

[0025] (3) Connect the data lines of the ultrasonic transmitting probe 3, the ultrasonic receiving probe 4 and the multi-degree-of-freedom motor 5 to the data acquisition system 6, and plug in the power cord.

[0026] (4) Before measurement, reset the two multi-degree-of-freedom motors 5 to ensure that the ultrasonic transmitting probe 3 and the ultrasonic receiving probe 4 are on the same straight line. Input the distance between the ultrasonic transmitting probe 3 and the ultrasonic receiving probe 4. After the measurement starts, the system displays the initial ultrasonic pulse intensity V. P发 and V P接 And the velocity of the flue gas.

[0027] (5) When the ultrasonic transmitting probe 3 and the ultrasonic receiving probe 4 are displaced due to factors such as vibration, the ultrasonic pulse intensity V P发 With ultrasonic pulse intensity V P接 There is a difference in pulse intensity. When the difference in pulse intensity between the two reaches a threshold, the control module 63 controls the output shaft of the multi-degree-of-freedom motor 5 to move, thereby adjusting the ultrasonic transmitting probe 3 and the ultrasonic receiving probe 4 to their initial positions (i.e., the ultrasonic transmitting probe 3 and the ultrasonic receiving probe 4 are on the same straight line).

[0028] While specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and not intended to limit the scope of the present invention. Equivalent modifications and variations made by those skilled in the art in accordance with the spirit of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A self-positioning measurement system for an ultrasonic flow meter probe for flue gas, comprising two detection flanges on the wall of a flue pipe, the two detection flanges being located on opposite sides of the flue pipe, characterized in that: The measurement system includes two connecting flanges, an ultrasonic transmitting probe, and an ultrasonic receiving probe. The two connecting flanges are respectively connected to two detection flange ports. A multi-degree-of-freedom motor is connected to the inner side of each connecting flange. The output shaft of one multi-degree-of-freedom motor is connected to the ultrasonic transmitting probe, and the output shaft of the other multi-degree-of-freedom motor is connected to the ultrasonic receiving probe. The measurement system also includes a data acquisition system. The two connecting flanges are respectively provided with wire holes, through which the data lines of the ultrasonic transmitting probe, the ultrasonic receiving probe, and the two multi-degree-of-freedom motors pass and are connected to the data acquisition system.

2. The self-positioning measurement system for a flue gas ultrasonic flow meter probe as described in claim 1, characterized in that: The ultrasonic transmitting probe and ultrasonic receiving probe are cylindrical, and each of the ultrasonic transmitting probe and ultrasonic receiving probe has a groove on the side facing the multi-degree-of-freedom motor. The output shaft of the multi-degree-of-freedom motor is interference-fitted into the corresponding groove.

3. The self-positioning measurement system for a flue gas ultrasonic flow meter probe as described in claim 1, characterized in that: The data acquisition system includes at least a data acquisition module for acquiring ultrasonic pulse intensity. The data acquisition module is connected to an ultrasonic transmitting probe and an ultrasonic receiving probe, respectively. The data acquisition module is connected to a main control module, and the main control module is connected to a control module for controlling the motion of a multi-degree-of-freedom motor.

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