A high-temperature external-mounting ultrasonic probe arrangement method

Abstract

The application relates to a high-temperature external-pasting ultrasonic probe arrangement method for an ultrasonic flowmeter for measuring the flow of liquid in a pipeline, and belongs to the acoustic and sensor technical fields. The technical scheme is that three external-pasting probes are arranged on one bus on one side of a measuring pipeline (2), the spacing between the three external-pasting probes (1) is different to adapt to the influence of high temperature on ultrasonic signal transmission, and correspondingly, three external-pasting probes are also arranged on the symmetric position of one bus on the other side of the measuring pipeline (2) to receive and emit ultrasonic signals. The external-pasting probes contain two installation modes of Z mode and V mode, the probes installed in the Z mode can normally work in normal temperature and high temperature environments, the probes installed in the V mode can only normally work in the high temperature environment, and the arrangement method can increase the number of measuring sound paths in the high temperature environment and improve the measuring precision in the high temperature environment.

Description

Technical Field

[0001] This invention relates to a method for arranging a high-temperature external ultrasonic probe for use in an ultrasonic flow meter for measuring the flow rate of liquid in a pipeline, and belongs to the fields of acoustics and sensor technology. Background Technology

[0002] There are two common installation methods for external ultrasonic probes: Z-mode and V-mode. Z-mode is more suitable for larger pipe diameters and poor water quality, while V-mode is adaptable to a wider range of pipe diameters, is easier to install, and is the standard installation method for external probes. The transmission of ultrasonic signals is affected by temperature, and the installation distance of an external probe calculated at room temperature may result in failure to receive ultrasonic signals at high temperatures. To ensure accurate measurement of the flow rate of the medium in the pipeline at high temperatures, the effect of temperature must be considered during the installation of the external probe to guarantee normal reception and transmission of ultrasonic signals. High temperatures refer to temperatures above 200℃. Summary of the Invention

[0003] The purpose of this invention is to provide a method for arranging high-temperature external ultrasonic probes. To improve the measurement accuracy of medium flow in pipelines at high temperatures, the combined arrangement of external probes can achieve Z-mode measurement at room temperature and Z-mode and V-mode measurement at high temperatures, thereby improving the flow measurement accuracy in high-temperature environments and solving the aforementioned technical problems existing in the prior art.

[0004] The technical solution of this invention is:

[0005] A method for arranging high-temperature external ultrasonic probes involves placing three external probes on a busbar on one side of the measuring pipeline. The spacing between the three external probes is different to accommodate the influence of high temperature on ultrasonic signal transmission. Correspondingly, three external probes are also arranged symmetrically on a busbar on the other side of the measuring pipeline for receiving and transmitting ultrasonic signals.

[0006] The external probe can be installed in two ways: Z-mode and V-mode.

[0007] The three external probes on one side of the measuring pipeline are: external probe one, external probe two, and external probe three; the three external probes on the other side are: external probe four, external probe five, and external probe six. External probe one and external probe five, together with external probe four and external probe two, form two Z-type acoustic paths; external probe one and external probe six, together with external probe four and external probe three, form two V-type acoustic paths.

[0008] When the external probe is arranged in the Z-mode, the installation distance of the external probe is calculated based on the ultrasonic transmission path at room temperature; when the external probe is arranged in the V-mode, the installation distance of the external probe is calculated based on the ultrasonic transmission path at high temperature.

[0009] When the external probes are arranged in a Z-mode, external probe one and external probe four can receive and transmit ultrasonic signals at room temperature normally, just like external probe two and external probe five. The transmission path is shorter in the Z-mode arrangement, and the ultrasonic signal deflection is smaller at high temperatures. The external probes can simultaneously receive and transmit ultrasonic signals at high temperatures.

[0010] When the external probes are arranged in V-mode, the ultrasonic signal is reflected, increasing the transmission path and causing a significant deviation compared to the normal temperature transmission path. To adapt to V-mode measurements at high temperatures, the installation positions of external probes three and six are determined according to the ultrasonic transmission path at high temperatures. When arranged in V-mode, external probes one and four can only receive and transmit ultrasonic signals at high temperatures, along with external probes three and six.

[0011] The present invention includes a set of external probes with two installation methods: Z-mode and V-mode. The probe installed in Z-mode can work normally in both normal and high temperature environments, while the probe installed in V-mode can only work normally in high temperature environments. This arrangement method can increase the number of measurement sound paths at high temperatures and improve the measurement accuracy at high temperatures.

[0012] The beneficial effects of this invention are as follows: To improve the measurement accuracy of medium flow rate in pipelines at high temperatures, the combination and arrangement of external probes can realize Z-mode measurement at room temperature and Z-mode and V-mode measurement at high temperatures, thereby improving the flow measurement accuracy in high-temperature environments. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of an example of the present invention;

[0014] Figure 2 This is a cross-sectional view of an example of the present invention;

[0015] Figure 3 This is a schematic diagram of the installation method Z in this invention;

[0016] Figure 4 This is a schematic diagram of the installation method V of the present invention;

[0017] In the diagram: 1. External probe, 2. Measuring pipeline, 3. External probe one, 4. External probe two, 5. External probe three, 6. External probe four, 7. External probe five, 8. External probe six. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] A method for arranging high-temperature external ultrasonic probes involves placing three external probes on a busbar on one side of the measuring pipe 2. The spacing between the three external probes 1 is different to accommodate the influence of high temperature on ultrasonic signal transmission. Correspondingly, three external probes are also arranged symmetrically on a busbar on the other side of the measuring pipe 2 for receiving and transmitting ultrasonic signals.

[0020] Combined with appendix Figure 2 The external probe 1 can be arranged in two ways: Z-mode and V-mode.

[0021] The three external probes on one side of the measuring pipeline 2 are: external probe 1 3, external probe 2 4, and external probe 3 5, and the three external probes on the other side are: external probe 4 6, external probe 5 7, and external probe 6 8. External probe 1 3 and external probe 5 7, together with external probe 4 6 and external probe 2 4, form two Z-type acoustic paths; external probe 1 3 and external probe 6 8, together with external probe 4 6 and external probe 3 5, form two V-type acoustic paths.

[0022] When the external probe 1 is arranged in the Z-mode, the installation distance of the external probe 1 is calculated based on the ultrasonic transmission path at room temperature; when the external probe 1 is arranged in the V-mode, the installation distance of the external probe 1 is calculated based on the ultrasonic transmission path at high temperature.

[0023] Combined with appendix Figure 3 When the external probe 1 is arranged in the Z-mode, external probe 1 3 and external probe 4 6 can normally receive and transmit ultrasonic signals at room temperature, just like external probe 2 4 and external probe 5 7. The transmission path is shorter in the Z-mode arrangement, and the ultrasonic signal deflection is smaller at high temperature. The external probe 1 can simultaneously receive and transmit ultrasonic signals at high temperature.

[0024] Combined with appendix Figure 4 When the external probe 1 is arranged in V mode, the ultrasonic signal is reflected, and the transmission path is increased, resulting in a larger deviation compared with the normal temperature transmission path due to temperature influence. In order to adapt to V mode measurement at high temperature, the installation positions of external probe 3 5 and external probe 6 8 are determined according to the ultrasonic transmission path at high temperature. When arranged in V mode, external probe 1 3 and external probe 4 6 can only receive and transmit ultrasonic signals at high temperature with external probe 3 5 and external probe 6 8.

[0025] The external probe 1 is a single-chip probe or a dual-chip probe.

Claims

1. A method for arranging a high-temperature externally attached ultrasonic probe, characterized in that: Three external probes (1) are arranged on a busbar on one side of the measuring pipe (2). The spacing between the three external probes (1) is different to adapt to the influence of high temperature on ultrasonic signal transmission. Correspondingly, three external probes are also arranged symmetrically on a busbar on the other side of the measuring pipe (2) for receiving and transmitting ultrasonic signals. The arrangement method of the external probes (1) includes two installation methods: Z-mode and V-mode. The three external probes on one side of the measuring pipe (2) are: external probes One (3), two (4) external probes and three (5) external probes, and three external probes on the other side are: four (6) external probes, five (7) external probes and six (8) external probes; one (3) external probes and five (7) external probes together with four (6) external probes and two (4) external probes form two Z-type acoustic paths; one (3) external probes and six (8) external probes together with four (6) external probes and three (5) external probes form two V-type acoustic paths.

2. The method for arranging a high-temperature external ultrasonic probe according to claim 1, characterized in that: When the external probe (1) is arranged in the Z mode, the installation distance of the external probe (1) is calculated according to the ultrasonic transmission path at room temperature; when the external probe (1) is arranged in the V mode, the installation distance of the external probe (1) is calculated according to the ultrasonic transmission path at high temperature.

3. The method for arranging a high-temperature externally attached ultrasonic probe according to claim 1, characterized in that: When the external probe (1) is arranged in the Z-mode, external probe one (3) and external probe four (6) can receive and transmit ultrasonic signals at room temperature normally with external probe two (4) and external probe five (7). The transmission path is shorter in the Z-mode arrangement, and the ultrasonic signal deflects less at high temperature. The external probe (1) can receive and transmit ultrasonic signals at high temperature at the same time.

4. The method for arranging a high-temperature external ultrasonic probe according to claim 1, characterized in that: When the external probe (1) is arranged in V mode, the ultrasonic signal is reflected, and the transmission path is increased, resulting in a large deviation from the normal temperature transmission path due to temperature influence. In order to adapt to V mode measurement at high temperature, the installation positions of external probe three (5) and external probe six (8) are determined according to the ultrasonic transmission path at high temperature. When arranged in V mode, external probe one (3) and external probe four (6) can only receive and transmit ultrasonic signals at high temperature with external probe three (5) and external probe six (8).

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