CN219244709U

CN219244709U - Portable Doppler ultrasonic flowmeter of wireless transmission

Info

Publication number: CN219244709U
Application number: CN202222959061.3U
Authority: CN
Inventors: 周信; 王静; 魏宇航
Original assignee: Wuhan Shuikejia Technology Co ltd
Current assignee: Wuhan Shuikejia Technology Co ltd
Priority date: 2022-11-04
Filing date: 2022-11-04
Publication date: 2023-06-23
Anticipated expiration: 2032-11-04

Abstract

The utility model provides a wireless transmission portable Doppler ultrasonic flowmeter, and belongs to the technical field of flow measurement. The device comprises a measuring assembly and a handheld instrument, wherein the measuring assembly comprises a flowmeter, a first bracket, a first measuring rod, a second bracket, a wireless communication device and a pointing device, the flowmeter is arranged at one end of the first bracket, the other end of the first bracket is provided with a lantern ring, the bottom end of the first measuring rod is inserted into the lantern ring, the second measuring rod is arranged at the other end of the first measuring rod, the second bracket and the pointing device are horizontally arranged at the outer side of the second measuring rod, and the wireless communication device is arranged on the second bracket; the front side of the handheld instrument is provided with the LED display screen, the second controller, the wireless communication module and the second power module are arranged in the handheld instrument, the flowmeter can measure various water areas such as river channels and water channels with high precision, and measurement data are transmitted through wireless signals, so that the limitation of wired data transmission of the ultrasonic flowmeter in the prior art is solved.

Description

Portable Doppler ultrasonic flowmeter of wireless transmission

Technical Field

The utility model relates to the technical field of flow measurement, in particular to a wireless transmission portable Doppler ultrasonic flowmeter.

Background

The Doppler ultrasonic flowmeter uses Doppler effect of sound wave propagating in fluid, and obtains fluid velocity by measuring Doppler frequency shift of sound wave scattered by moving particles in fluid, and then uses algorithm of velocity area to measure fluid flow rate by combining with built-in pressure type water level meter. The traditional Doppler ultrasonic flowmeter has the advantages that the transmission of acquired data mostly adopts a wired mode, but the transmission data lines have obvious defects and limitations, when a wider channel is required to be measured, the required communication lines are longer naturally, the longer the line is, the more the signal attenuation is well known, the measurement accuracy is affected, meanwhile, the carrying is inconvenient, the shorter the communication lines are, the channels with narrower width can only be measured, and the application scene is limited.

Disclosure of Invention

In order to make up for the defects, the portable Doppler ultrasonic flowmeter capable of wireless transmission can be used for measuring various water areas such as river channels and water channels with high precision, and transmitting measurement data through wireless signals, so that the limitation of wired data transmission of the ultrasonic flowmeter in the prior art is solved.

The utility model is realized in the following way:

a wireless transmission portable Doppler ultrasonic flowmeter comprises a measuring component and a handheld instrument;

the measuring assembly comprises a flowmeter, a first support, a first measuring rod, a second support, a wireless communication device and a pointing device, wherein the flowmeter is installed at one end of the first support, a transducer is arranged at one end of the flowmeter, a watertight joint is arranged at the other end of the flowmeter, a first controller and a first power module are arranged in the flowmeter, a lantern ring is arranged at the other end of the first support, the bottom end of the first measuring rod is inserted into the lantern ring, the second measuring rod is arranged at the other end of the first measuring rod, the second support and the pointing device are horizontally arranged at the outer side of the second measuring rod, the wireless communication device is installed on the second support, and the wireless communication device is connected with a watertight joint through wires;

the front side of the handheld instrument is provided with an LED display screen, a second controller, a wireless communication module and a second power module are arranged in the handheld instrument, and the wireless communication module is in communication connection with the wireless communicator.

In one embodiment of the utility model, a notch groove is formed at one end of the first bracket far away from the lantern ring, strip holes are symmetrically formed at two sides of the notch groove, and the flowmeter is arranged at the top of the notch groove.

In one embodiment of the utility model, pressing blocks are symmetrically arranged on the outer sides of four corners of the flowmeter, the pressing blocks are in a Z-shaped structure, one ends of the pressing blocks are in pressure connection with a bottom plate of the flowmeter, four connecting screws are arranged at the bottom of the first bracket, one ends of the connecting screws are in butt joint with the bottom of the first bracket, hand-rotating nuts are arranged after the other ends of the connecting screws sequentially penetrate through the strip holes and the pressing blocks, the hand-rotating nuts are in threaded fit with the connecting screws, and one sides of the hand-rotating nuts are in butt joint with the top of the pressing blocks.

In one embodiment of the utility model, the top end of the first measuring rod is provided with an external thread, one end of the second measuring rod is provided with an internal thread, the external thread is matched with the internal thread, and the diameter of the first measuring rod is equal to the diameter of the second measuring rod.

In one embodiment of the utility model, a first butterfly bolt is arranged on one side of the collar, the end part of the first butterfly bolt is in threaded fit with the collar and then is in abutting connection with the outer surface of the first measuring rod, one end of the second bracket is sleeved outside the second measuring rod, a second butterfly bolt is arranged on the outer side of the second bracket, and the end part of the second butterfly bolt is in threaded fit with the second bracket and then is in abutting connection with the outer surface of the second measuring rod.

In one embodiment of the utility model, a mounting hole is formed in one end, far away from the second measuring rod, of the second bracket, the wireless communicator is arranged on the inner side of the mounting hole, a third butterfly bolt is arranged on the outer side of the second bracket, and the end portion of the third butterfly bolt is in threaded fit with the second bracket and then is in butt joint with the outer surface of the wireless communicator.

In one embodiment of the utility model, one end of the pointer is sleeved on the outer side of the second measuring rod, the other end of the pointer is oriented towards the same direction as the transducer, a horizontal bubble is arranged at the top of the pointer, a fourth butterfly bolt is arranged on one side of the pointer, and the end of the fourth butterfly bolt is abutted to the outer surface of the second measuring rod after being in threaded fit with the pointer.

In an embodiment of the utility model, the output end of the first power module is electrically connected with the input end of the first controller, the LED display screen is electrically connected with the second controller, and the output ends of the wireless communication module and the second power module are both electrically connected with the input end of the second controller.

In an embodiment of the utility model, a data storage module is further disposed inside the handheld device, and the data storage module is electrically connected to the second controller.

The portable Doppler ultrasonic flowmeter for wireless transmission, which is obtained through the design, has the beneficial effects that:

(1) Each part of the measuring assembly can be split into independent parts, portability is improved, the assembly is simple, the connection is firm, the flowmeter on the bracket can stably and accurately collect calculated flow data, the operation is simple, and channel measurement of different water depths can be met;

(2) The portable handheld instrument integrates the function of an upper computer, is connected with the flowmeter through the wireless communication device, realizes the transmission of acquired data, displays the data through a display screen on the handheld instrument, and in addition, the displayed data cannot be cleared or lost, but is stored through the data storage module, so that a user can conveniently retrieve and view the data again.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some examples of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a wireless-transmission portable doppler ultrasonic flowmeter according to an embodiment of the present utility model;

FIG. 2 is an exploded view of a measurement assembly according to an embodiment of the present utility model;

FIG. 3 is an enlarged view at A in FIG. 1;

fig. 4 is a schematic diagram of communication connection of a wireless-transmission portable doppler ultrasound flowmeter according to an embodiment of the present utility model;

in the figure: 100. a measurement assembly; 101. a flow meter; 1011. a transducer; 1012. a watertight joint; 1013. a first controller; 1014. a first power module; 102. a first bracket; 1021. a collar; 1022. a notch groove; 1023. a slit hole; 1025. a first butterfly bolt; 103. a first measuring bar; 1031. an external thread; 104. a second measuring bar; 1041. an internal thread; 105. a second bracket; 1051. a mounting hole; 1052. a second butterfly bolt; 1053. a third butterfly bolt; 106. a wireless communicator; 107. a pointer; 1071. horizontal bubble; 1072. a fourth butterfly bolt; 108. briquetting; 1081. a connecting screw; 1082. rotating the nut by hand; 200. a handset; 201. a second controller; 202. a wireless communication module; 203. an LED display screen; 204. a data storage module; 205. and a second power module.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, based on the embodiments of the utility model, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the utility model.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, based on the embodiments of the utility model, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

Examples

Referring to fig. 1-4, the present utility model provides a technical solution: the portable Doppler ultrasonic flowmeter comprises a measuring component 100 and a handheld instrument 200, wherein the measuring component 100 is placed in a channel and used for collecting water flow signals and calculating data such as hydrological flow rate, flow rate and water level, and the handheld instrument 200 is held by a worker for receiving, displaying and reading the data.

The measuring assembly 100 comprises a flowmeter 101, a first bracket 102, a first measuring rod 103, a second measuring rod 104, a second bracket 105, a wireless communicator 106 and a pointer 107, wherein the flowmeter 101 is arranged at one end of the first bracket 102, the first bracket 102 extends outwards to a certain length, the flowmeter 101 is ensured to be stable and kept away from the position of the first measuring rod 103 as far as possible, the water flow resistance near the first measuring rod 103 is prevented from influencing the operation of the flowmeter 101, a transducer 1011 is arranged at one end of the flowmeter 101, the transducer 1011 emits and receives ultrasonic signals, the data of the water flow speed, the flow and the like are calculated according to the signal difference, a watertight connector 1012 is arranged at the other end of the flowmeter 101, the watertight connector 1012 is connected with a data wire for transmitting the data of the flowmeter 101, a first controller 1013 and a first power module 1014 are arranged inside the flowmeter 101, the first controller 1013 is used for controlling the operation of the flowmeter 101, the other end of the first bracket 102 is provided with a collar 1021, the bottom end of the first measuring rod 103 is inserted into the collar 1021, the outer diameter of the first measuring rod 103 is matched with the inner diameter of the collar 1021, the connection firmness is guaranteed, the second measuring rod 104 is arranged at the other end of the first measuring rod 103, the second measuring rod 104 is used as an extension rod piece, the portability of the measuring assembly 100 is improved, the application of the flowmeter 101 meets the use requirements of different scenes, the second bracket 105 and the pointer 107 are horizontally arranged at the outer side of the second measuring rod 104, the wireless communication device 106 is arranged on the second bracket 105, the second bracket 105 is used for supporting and installing the wireless communication device 106, the wireless communication device 106 is connected with a watertight joint 1012 through wires, and the wireless communication device 106 is used for transmitting data acquired by the flowmeter 101;

the front side of the handheld instrument 200 is provided with an LED display screen 203, a key is arranged below the LED display screen 203 and used for operating the handheld instrument 200, parameter setting can be performed on the flowmeter 101, a second controller 201, a wireless communication module 202 and a second power module 205 are arranged inside the handheld instrument 200, the second controller 201 is used for controlling operation of the handheld instrument 200, the wireless communication module 202 is in communication connection with the wireless communication device 106, after the wireless communication module 202 is connected with the wireless communication device 106, data acquired by the flowmeter 101 can be uploaded to the handheld instrument 200, and parameter setting or operation instructions performed on the handheld instrument 200 can be issued and transmitted to the flowmeter 101.

As an embodiment of the present utility model, further, a notch 1022 is formed at one end of the first bracket 102 far away from the collar 1021, the flowmeter 101 is disposed at the top of the notch 1022, the notch 1022 provides a measuring space for the water gauge at the bottom of the flowmeter 101, so as to ensure accuracy of measuring other parameters of the flowmeter 101, two sides of the notch 1022 are symmetrically provided with elongated holes 1023, and the elongated holes 1023 facilitate adjusting the installation position of the flowmeter 101.

As an embodiment of the present utility model, further, the outside of four corners of the flowmeter 101 is symmetrically provided with the pressing blocks 108, the pressing blocks 108 are in a zigzag structure, one end of each pressing block 108 is pressed against the bottom plate of the flowmeter 101, the pressing blocks 108 are used for firmly fixing the flowmeter 101 on the mounting frame to prevent the flowmeter 101 from falling out, four connecting screws 1081 are arranged at the bottom of the first bracket 102, one end of each connecting screw 1081 is abutted against the bottom of the first bracket 102, the other end of each connecting screw 1081 sequentially penetrates through the long hole 1023 and the pressing block 108, a hand nut 1082 is arranged, the hand nut 1082 is in threaded fit with the connecting screw 1081, one side of each hand nut 1082 is abutted against the top of each pressing block 108, the diameter of each second screw is matched with the width of the long hole 1023, and each second screw can move in the long hole 1023, so that the mounting position and the angle of the flowmeter 101 can be adjusted, the hand nut 1082 is matched with the second screw to enable the pressing blocks 108 to press the flowmeter 101 and then be limited and fixed with the first bracket 102, and the hand nut 1082 is convenient to operate, and other tools are not needed to be used simply.

As an embodiment of the present utility model, further, the top end of the first measuring rod 103 is provided with the external thread 1031, one end of the second measuring rod 104 is provided with the internal thread 1041, the external thread 1031 is matched with the internal thread 1041, the diameter of the first measuring rod 103 is equal to that of the second measuring rod 104, the two measuring rods are connected in a threaded connection manner, the length of the measuring rod is prolonged, the use is convenient, the connection is simple, and the portability of the measuring rod is also improved.

As an embodiment of the present utility model, further, a first butterfly bolt 1025 is provided on one side of the collar 1021, an end portion of the first butterfly bolt 1025 is in threaded fit with the collar 1021 and then abuts against an outer surface of the first measuring rod 103, the first butterfly bolt 1025 is used for connecting and fixing the collar 1021 and the first measuring rod 103, one end of the second bracket 105 is sleeved outside the second measuring rod 104, a second butterfly bolt 1052 is provided on the outer side of the second bracket 105, an end portion of the second butterfly bolt 1052 is in threaded fit with the second bracket 105 and then abuts against an outer surface of the second measuring rod 104, the second butterfly bolt 1052 is used for connecting and fixing the second bracket 105 and the second measuring rod 104, and the butterfly bolt locking operation is simple to use.

As an embodiment of the present utility model, further, a mounting hole 1051 is formed at one end of the second bracket 105 far away from the second measuring rod 104, the wireless communicator 106 is disposed at the inner side of the mounting hole 1051, a third butterfly bolt 1053 is disposed at the outer side of the second bracket 105, an end portion of the third butterfly bolt 1053 is in threaded fit with the second bracket 105 and then abuts against the outer surface of the wireless communicator 106, and the third butterfly bolt 1053 is used for connecting and fixing the wireless communicator 106 and the second bracket 105.

As an embodiment of the present utility model, further, one end of the pointer 107 is sleeved on the outer side of the second measuring rod 104, the other end of the pointer 107 is oriented towards the transducer 1011, the pointer 107 is used for resolving the orientation of the flowmeter 101, when the flowmeter 101 is submerged in water, the position of the flowmeter 101 is convenient to adjust, so that the measurement data is accurate, the top of the pointer 107 is provided with the horizontal bubble 1071, the horizontal bubble 1071 is convenient for observing the levelness of the measuring rod, one side of the pointer 107 is provided with the fourth butterfly bolt 1072, the end of the fourth butterfly bolt 1072 abuts against the outer surface of the second measuring rod 104 after being in threaded fit with the pointer 107, and the fourth butterfly bolt 1072 is used for connecting and fixing the pointer 107 and the second measuring rod 104.

As an embodiment of the present utility model, further, the output end of the first power module 1014 is electrically connected to the input end of the first controller 1013, the first power module 1014 provides electric energy for the operation of the flowmeter 101, the LED display screen 203 is electrically connected to the second controller 201, the LED display screen 203 is used for displaying measurement results, the output ends of the wireless communication module 202 and the second power module 205 are electrically connected to the input end of the second controller 201, after the wireless communication module 202 and the wireless communication device 106 establish data connection, data signals are received and transmitted to the second controller 201, the second controller 201 converts the data into images to be displayed on the LED display screen 203 for being convenient for a worker to read, and the second power module 205 provides electric energy for the operation of the second controller 201.

As an embodiment of the present utility model, further, a data storage module 204 is further disposed in the handheld device 200, and the data storage module 204 is electrically connected to the second controller 201, so that the data received by the second controller 201 is not cleared or lost, but is stored through the data storage module 204, so as to be convenient for a user to call and view.

Specifically, the working principle of the portable Doppler ultrasonic flowmeter for wireless transmission is as follows: the flowmeter 101 is prevented from being placed on the first bracket 102, the position and the angle are adjusted, the positions of the four pressing blocks 108 are moved, the pressing blocks 108 press the bottom plate of the flowmeter 101, the hand-turning nuts 1082 are sequentially rotated, the pressing blocks 108 are tightly screwed and fixed with the first bracket 102, then the bottom end of the first measuring rod 103 is inserted into the collar 1021, the first butterfly bolt 1025 is tightly screwed, then the bottom internal thread 1041 of the second measuring rod 104 is tightly screwed with the external thread 1031 at the top of the first measuring rod 103 in a matching manner, the second space is sleeved outside the second measuring rod 104, the second butterfly bolt 1052 is tightly screwed after the proper height and the proper direction are adjusted, then the wireless communicator 106 is clamped into the mounting hole 1051, the third butterfly bolt 1053 is tightly screwed, then the wireless communicator 106 is connected with the watertight connector 1012 through a cable, the pointer 107 is sleeved outside the second measuring rod 104, after the direction of the pointer is adjusted to be the same as the direction of the transducer 1011 on the flowmeter 101, the fourth butterfly bolt 1072 is twisted to complete the assembly of the measuring assembly 100, then the flowmeter 101 is placed into water flow to be measured, the wireless communicator 106 is started, the transducer 1011 sends and receives ultrasonic signals, the water flow signals are collected, the first controller 1013 calculates and converts the signals into corresponding data, the corresponding data are transmitted to the wireless communicator 106 through the watertight connector 1012, a worker is in a certain range, the worker receives the data after connecting the wireless communicator 106 through the wireless communication module 202 on the handheld instrument 200, the second controller 201 converts the received data into image information and transmits the image information to the LED display screen 203 for displaying, and the worker can read the data such as flow speed, flow rate and water pressure.

It should be noted that, specific model specifications of the transducer 1011, the watertight connector 1012, the first controller 1013, the first power module 1014, the second controller 201, the wireless communication module 202, the LED display 203, the data storage module 204 and the second power module 205 need to be determined by selecting a model according to the actual specifications of the device, and the specific model selection calculation method adopts the prior art, so that detailed description thereof is omitted.

It should be noted that the power supply and the principle of the transducer 1011, the watertight connector 1012, the first controller 1013, the first power module 1014, the second controller 201, the wireless communication module 202, the LED display 203, the data storage module 204 and the second power module 205 will be clear to those skilled in the art, and will not be described in detail herein.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, and various modifications and variations may be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A wireless transmission portable doppler ultrasound flow meter, characterized by comprising a measurement assembly (100) and a handset (200);

the measuring assembly (100) comprises a flowmeter (101), a first support (102), a first measuring rod (103), a second measuring rod (104), a second support (105), a wireless communicator (106) and a pointer (107), wherein the flowmeter (101) is installed at one end of the first support (102), a transducer (1011) is arranged at one end of the flowmeter (101), a watertight connector (1012) is arranged at the other end of the flowmeter (101), a first controller (1013) and a first power module (1014) are arranged in the flowmeter (101), a lantern ring (1021) is arranged at the other end of the first support (102), the bottom end of the first measuring rod (103) is inserted into the lantern ring (1021), the second measuring rod (104) is arranged at the other end of the first measuring rod (103), the second support (105) and the pointer (107) are horizontally arranged at the outer side of the second measuring rod (104), the wireless communicator (106) is installed at the second support (105), and the wireless communicator (106) is connected with the watertight connector (1012).

The front side of the handheld instrument (200) is provided with an LED display screen (203), a second controller (201), a wireless communication module (202) and a second power module (205) are arranged in the handheld instrument (200), and the wireless communication module (202) is in communication connection with the wireless communicator (106).

2. The portable doppler ultrasound flowmeter of claim 1, wherein a notch groove (1022) is formed at one end of the first bracket (102) far away from the collar (1021), elongated holes (1023) are symmetrically formed at two sides of the notch groove (1022), and the flowmeter (101) is arranged at the top of the notch groove (1022).

3. The portable doppler ultrasonic flowmeter of claim 2, wherein, briquetting (108) are symmetrically arranged on the outer sides of four corners of flowmeter (101), briquetting (108) are in a Z-shaped structure, one end of briquetting (108) is in press connection with the bottom plate of flowmeter (101), four connecting screws (1081) are arranged at the bottom of first bracket (102), one end of connecting screw (1081) is in butt joint with the bottom of first bracket (102), a hand-turning nut (1082) is arranged behind connecting screw (1081) and penetrates through strip hole (1023) and briquetting (108), hand-turning nut (1082) is in threaded fit with connecting screw (1081), and one side of hand-turning nut (1082) is in butt joint with the top of briquetting (108).

4. The portable doppler ultrasound flowmeter of claim 1, wherein an external thread (1031) is provided at a top end of the first measuring rod (103), an internal thread (1041) is provided at one end of the second measuring rod (104), the external thread (1031) is matched with the internal thread (1041), and a diameter of the first measuring rod (103) is equal to a diameter of the second measuring rod (104).

5. The portable doppler ultrasound flowmeter of claim 1, wherein a first butterfly bolt (1025) is disposed on one side of the collar (1021), an end of the first butterfly bolt (1025) is in threaded engagement with the collar (1021) and then abuts against an outer surface of the first measuring rod (103), one end of the second bracket (105) is sleeved outside the second measuring rod (104), a second butterfly bolt (1052) is disposed on an outer side of the second bracket (105), and an end of the second butterfly bolt (1052) is in threaded engagement with the second bracket (105) and then abuts against an outer surface of the second measuring rod (104).

6. The portable doppler ultrasound flowmeter of claim 1, wherein the second bracket (105) is far away from an end of the second measuring rod (104) and provided with a mounting hole (1051), the wireless communicator (106) is arranged at the inner side of the mounting hole (1051), a third butterfly bolt (1053) is arranged at the outer side of the second bracket (105), and an end part of the third butterfly bolt (1053) is in threaded fit with the second bracket (105) and then is in butt joint with the outer surface of the wireless communicator (106).

7. The portable doppler ultrasonic flowmeter of claim 1, wherein one end of the pointer (107) is sleeved on the outer side of the second measuring rod (104), the other end of the pointer (107) is oriented towards the same direction as the transducer (1011), a horizontal bubble (1071) is arranged at the top of the pointer (107), a fourth butterfly bolt (1072) is arranged at one side of the pointer (107), and the end of the fourth butterfly bolt (1072) is abutted to the outer surface of the second measuring rod (104) after being in threaded fit with the pointer (107).

8. The wireless transmission portable doppler ultrasound flow meter according to claim 1, wherein the output end of the first power module (1014) is electrically connected to the input end of the first controller (1013), the LED display (203) is electrically connected to the second controller (201), and the output ends of the wireless communication module (202) and the second power module (205) are electrically connected to the input end of the second controller (201).

9. The wireless transmission portable doppler ultrasound flow meter according to claim 1, wherein a data storage module (204) is further provided inside the hand-held instrument (200), and the data storage module (204) is electrically connected to the second controller (201).