阅读说明：本技术 一种内置温压检测的超声波流速传感器及安装方法 (Built-in temperature and pressure detection ultrasonic flow velocity sensor and mounting method ) 是由 王中洲 潘桢宇 余和伟 田鹏 于 2021-07-27 设计创作，主要内容包括：本发明公开了一种内置温压检测的超声波流速传感器及安装方法,包括外壳体,所述外壳体内安装有温度传感器、压力传感器、超声波传感器和主板,所述主板内置有温压调理电路、MCU、电源模块和单总线控制器,所述主板的一侧通过引线与所述温度传感器、压力传感器、超声波传感器相连接,所述主板的另一侧连接有对外输出线束。本发明能够在提高集成度同时简化线缆的数量。(The invention discloses an ultrasonic flow velocity sensor with built-in warm-pressing detection and an installation method thereof. The invention can improve the integration level and simplify the number of cables.)

1. The utility model provides an ultrasonic wave flow velocity transducer that built-in warm-pressing detected which characterized in that: including shell body (1), install temperature sensor (2), pressure sensor (3), ultrasonic sensor (4) and mainboard (5) in shell body (1), mainboard (5) embeds there is warm pressure conditioning circuit, MCU, power module and single bus controller, one side of mainboard (5) through the lead wire with temperature sensor (2), pressure sensor (3), ultrasonic sensor (4) are connected, the opposite side of mainboard (5) is connected with external output wire harness.

2. The ultrasonic flow rate sensor with built-in warm-pressure detection according to claim 1, characterized in that: pressure taking hole (6) has been seted up to one side of shell body (1), pressure sensor (3) are installed in the inside of pressure taking hole (6), temperature sensor (2) are installed with one side of pressure taking hole (6) symmetry in shell body (1), the front end of temperature sensor (2) is probe part (7), probe part (7) extend to shell body (1) outside and with shell body (1) integrated into one piece.

3. The ultrasonic flow rate sensor with built-in warm-pressure detection according to claim 2, characterized in that: the ultrasonic sensor is characterized in that the inner part of the outer shell (1) is of a cavity structure and is filled with pouring sealant, the ultrasonic sensor (4) is arranged at the bottom end of the inner part of the outer shell (1), and the mainboard (5) is arranged at the top end of the inner part of the outer shell (1).

4. The ultrasonic flow rate sensor with built-in warm-pressure detection according to claim 3, characterized in that: the external output wire harness is provided with four wires, namely a power line VCC, a temperature and pressure DATA line DATA, an ultrasonic signal line SIG and a system ground wire GND.

5. The ultrasonic flow rate sensor with built-in warm-pressure detection according to claim 4, wherein: the shell (1) is made of stainless steel or titanium alloy.

6. A method for installing an ultrasonic flow velocity sensor with built-in temperature and pressure detection is characterized by comprising the following steps:

s1, mounting the ultrasonic sensor (4), and coupling the ultrasonic sensor (4) at the bottom of the inner side of the outer shell (1) through glue;

s2, installing temperature and pressure sensors, and respectively installing a temperature sensor (2) and a pressure sensor (3) on two sides inside the outer shell (1);

s3, installing the main board (5), completely encapsulating the part below the preassembly position of the main board (5) in a mode of filling epoxy resin glue, and then installing the main board (5) at the preassembly position of the top of the inner side of the outer shell (1);

s4, installing an external output wire harness, and connecting the external output wire harness with the main board (5) in a welding manner;

s5, installing the outer shell (1) on the pipe body to be detected, wherein the installation position of the outer shell (1) meets the following conditions: the ratio of the distance from the probe part (7) of the temperature sensor (2) to the inlet part of the pipe body to the length of the pipe body is equal to the ratio of the distance from the probe part (7) of the temperature sensor (2) to the outlet part of the pipe body to the distance from the probe part (7) of the temperature sensor (2) to the inlet part of the pipe body.

7. The method of mounting an ultrasonic flow rate sensor with built-in warm-pressure detection according to claim 6, wherein: the diameter of the pipe body is less than one tenth of the length of the pipe body.

8. The method of mounting an ultrasonic flow rate sensor with built-in warm-pressure detection according to claim 7, wherein: the diameter of the pipe body is less than one twentieth of the length of the pipe body.

9. The method of mounting an ultrasonic flow rate sensor with built-in warm-pressure detection according to claim 8, wherein: the pipe body is a straight pipe, the inner diameters of the pipe bodies are the same, and a heat insulation layer is arranged on the outer side of each pipe body.

10. The method of mounting an ultrasonic flow rate sensor with built-in warm-pressure detection according to claim 9, wherein: and step S41, after step S41, detecting whether dirt is attached to the inner side wall of the tube body, if so, cleaning the tube body, and if not, executing step S5.

Technical Field

The invention belongs to the technical field of ultrasonic flow velocity sensors, and particularly relates to an ultrasonic flow velocity sensor with built-in warm-pressing detection and an installation method.

Background

In the process of measuring the trade handing over of gas, fuel gas and the like by using the ultrasonic flowmeter, the working condition volume flow measured by the ultrasonic flowmeter needs to be converted into the standard condition volume flow, the temperature and the pressure of a fluid medium in a pipeline need to be measured in the conversion calculation process according to the standard of GB/T18604 and 2014, and the conversion formula is as follows:

pf and Tf are the temperature and pressure of the fluid medium in the pipeline, and the fluid medium needs to be measured by an external temperature and pressure transmitter in the measurement process of the existing ultrasonic flowmeter.

The utility model discloses a chinese utility model patent with application number 202020996860.6 discloses civilian ultrasonic wave gas table detection circuitry, include: the system comprises an MCU, an ultrasonic transducer, an analog front end circuit, a display circuit and a valve control circuit; the ultrasonic transducer is connected with the analog front end circuit, and the analog front end circuit, the display circuit and the valve control circuit are all connected with the MCU; the analog front-end circuit sequentially comprises an ultrasonic excitation circuit, a signal sampling circuit and a signal processing circuit, and the signal processing circuit is connected with the MCU; the ultrasonic transducer comprises an upstream ultrasonic transducer and a downstream ultrasonic transducer which are connected, the upstream ultrasonic transducer is connected with the ultrasonic excitation circuit, and the downstream ultrasonic transducer is connected with the signal processing circuit. The utility model provides high ultrasonic wave gas table's measurement accuracy and range scope to have the warm pressure compensation function. The warm-pressing sampling circuit in the patent is arranged outside the pipe body, and part of the pipe body is easy to be provided with a temperature transmitter and a pressure transmitter which cannot be externally arranged due to the problems of self length, space, shape and size and the like, and the existing sensor signal line has more cables and is easy to be confused.

Disclosure of Invention

In order to solve the problems, the invention provides an ultrasonic flow velocity sensor with built-in warm-pressure detection, which comprises an outer shell, wherein a temperature sensor, a pressure sensor, an ultrasonic sensor and a mainboard are arranged in the outer shell, a warm-pressure conditioning circuit, an MCU, a power module and a single bus controller are arranged in the mainboard, one side of the mainboard is connected with the temperature sensor, the pressure sensor and the ultrasonic sensor through leads, and the other side of the mainboard is connected with an external output wire harness.

Preferably, a pressure taking hole is formed in one side of the outer shell, the pressure sensor is installed inside the pressure taking hole, the temperature sensor is installed on one side of the outer shell, which is symmetrical to the pressure taking hole, the front end of the temperature sensor is a probe part, and the probe part extends to the outside of the outer shell and is integrally formed with the outer shell.

Preferably, the inside cavity structure that is of shell body has the pouring sealant to fill, ultrasonic sensor sets up in the inside bottom of shell body, the mainboard sets up in the inside top of shell body.

Preferably, four external output wire harnesses are provided, which are respectively a power line VCC, a temperature and voltage DATA line DATA, an ultrasonic signal line SIG, and a system ground GND.

Preferably, the outer shell is made of stainless steel or titanium alloy.

A method for installing an ultrasonic flow velocity sensor with built-in temperature and pressure detection comprises the following steps:

s1, mounting an ultrasonic sensor, and coupling the ultrasonic sensor at the bottom of the inner side of the outer shell through glue;

s2, installing temperature and pressure sensors, and respectively installing the temperature sensors and the pressure sensors on two sides of the interior of the outer shell;

s3, installing the main board, completely encapsulating the part below the pre-installation position of the main board in a mode of filling epoxy resin glue, and then installing the main board at the pre-installation position of the top of the inner side of the outer shell;

s4, installing an external output wire harness, and connecting the external output wire harness with the mainboard in a welding manner;

s5, installing the outer shell on the pipe body to be detected, wherein the installation position of the outer shell meets the following conditions: the ratio of the distance from the temperature sensor probe part to the inlet part of the pipe body to the length of the pipe body is equal to the ratio of the distance from the temperature sensor probe part to the outlet part of the pipe body to the distance from the temperature sensor probe part to the inlet part of the pipe body.

Preferably, the diameter of the tube body is less than one tenth of the length of the tube body.

Preferably, the diameter of the pipe body is less than one twentieth of the length of the pipe body

Preferably, the pipe body is a straight pipe, the inner diameters of the pipe bodies are the same, and a heat insulation layer is arranged on the outer side of the pipe body.

Preferably, the method further includes a step S41, wherein after the step S41 detects whether dirt adheres to the inner side wall of the tube body, if yes, the tube body is cleaned, and if not, the method performs the step S5

The invention has the advantages that:

1. according to the built-in temperature and pressure sensor of the ultrasonic flowmeter, the temperature and pressure data are measured by the internal microcontroller while the flow rate of the pipeline is measured, and the temperature and pressure data are transmitted to the flowmeter transmitter in a single bus mode.

2. The average temperature of the fluid in the pipe body can be accurately detected at the position where the ultrasonic flowmeter is installed, and a plurality of temperature sensors are not required to be arranged for calculation.

Drawings

FIG. 1 is a schematic diagram of the construction of a sensor according to the present invention;

FIG. 2 is a schematic diagram of the sensor position of the present invention;

FIG. 3 is a system framework diagram of the present invention;

FIG. 4 is an experimental diagram of the detecting device of the present invention.

In the figure: the ultrasonic probe comprises an outer shell 1, a temperature sensor 2, a pressure sensor 3, an ultrasonic sensor 4, a main board 5, a pressure taking hole 6 and a probe part 7.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Example 1

As shown in fig. 1-3, an ultrasonic flow velocity sensor with built-in warm-pressing detection function comprises a housing body 1, a temperature sensor 2 is installed in the housing body 1, a pressure sensor 3, an ultrasonic sensor 4 and a mainboard 5, the housing body 1 is processed by using a stainless steel or titanium alloy housing, normal use under pressure and corrosive media is guaranteed, and the housing body is used as a structural support for the ultrasonic sensor 4 and the warm-pressing sensor, a warm-pressing conditioning circuit is arranged in the mainboard 5, a Micro Controller Unit (MCU), a power module and a single bus controller are arranged in the mainboard 5, one side of the mainboard 5 is connected with the temperature sensor 2 through a lead, the pressure sensor 3 and the ultrasonic sensor 4, and the other side of the mainboard 5 is connected with an external output wire harness. The mainboard 5 is connected with the ultrasonic sensor 4, two lines of the sensor are converted into interfaces with the same axes of SMA and BNC, the temperature sensor 2 and the pressure sensor 3 are connected to the mainboard 5 through lead wires, temperature and pressure analog signals are connected to the MCU control unit after passing through the temperature and pressure conditioning circuit, the MCU control unit converts read temperature and pressure signals into digital quantities and sends measured information to the flowmeter transmitter through a single bus, the temperature and pressure digital communication is carried out on the basis of the existing sensor signal line in a single bus mode, the number of cables is simplified, four external output wire harnesses are provided, as shown in L1-L4 in figure 3, the four external output wire harnesses are respectively a power wire VCC, a temperature and pressure DATA wire DATA, an ultrasonic signal wire SIG, a system ground wire GND, a VCC power wire, a temperature and pressure DATA wire DATA, the ultrasonic signal wire SIG shares the GND as a ground plane, and the four external output wires are welded on the mainboard 5 for controlling the transmitter and reading the temperature and pressure DATA, pressure taking hole 6 has been seted up to one side of shell body 1, pressure sensor 3 installs in the inside of pressure taking hole 6, through pressure taking hole 6, the pressure value of the inside fluid of pressure sensor 3 that shell body 1 is built-in can accurate real-time measuring tube, temperature sensor 2 is installed with one side of pressure taking hole 6 symmetry to shell body 1, temperature sensor 2's front end is probe portion 7, probe portion 7 extends to shell body 1 outside and with 1 integrated into one piece of shell body, 1 inside cavity structure and packing of shell body have the casting glue, ultrasonic sensor 4 sets up in 1 inside bottom of shell body, mainboard 5 sets up in 1 inside top of shell body. This embodiment is at inside ultrasonic wave flow velocity transducer integration ultrasonic sensor 4, temperature sensor 2, pressure sensor 3, through built-in micro-processing unit, the measured value of gathering temperature and pressure turns into the data volume of single bus communication, increased the measurement of temperature and pressure on current ultrasonic transducer's basis, the flowmeter is transmitted in the mode through the single bus, have the advantage of the quantity of highly integrated and simplified cable, solve the current problem that can not external temperature and pressure transmitter because pipeline length and space problem.

Example 2

A method for installing an ultrasonic flow velocity sensor with built-in temperature and pressure detection comprises the following steps:

s1, mounting the ultrasonic sensor 4, and coupling the ultrasonic sensor 4 to the bottom of the inner side of the outer shell 1 through glue;

s2, installing temperature and pressure sensors, and respectively installing a temperature sensor 2 and a pressure sensor 3 on two sides inside the outer shell 1;

s3, installing the main board 5, firstly, completely encapsulating the part below the preassembly position of the main board 5 in a mode of filling epoxy resin glue, and then installing the main board 5 at the preassembly position of the top of the inner side of the outer shell 1;

s4, installing an external output wire harness, and connecting the external output wire harness with the mainboard 5 in a welding manner;

in steps S1 to S4, the ultrasonic flow velocity sensor is assembled, and after the assembly, the ultrasonic flow velocity sensor needs to be installed on a pipe body to be tested, and the temperature and the pressure of a fluid medium inside the pipe are measured, and the temperature of the fluid medium inside the pipe changes when flowing through the pipe, and the average temperature of the fluid medium inside the pipe body needs to be calculated when conversion is performed. The ratio of the distance from the probe part 7 of the temperature sensor 2 to the inlet part of the pipe body to the length of the pipe body is equal to the ratio of the distance from the probe part 7 of the temperature sensor 2 to the outlet part of the pipe body to the distance from the probe part 7 of the temperature sensor 2 to the inlet part of the pipe body. As shown in FIG. 4, the temperature sensor2 the distance from the probe part 7 to the inlet part of the pipe body is b, the distance from the probe part 7 of the temperature sensor 2 to the outlet part of the pipe body is a, and a and b satisfy the following relational expression:in this embodiment, a measuring pipe is found, the total length of the pipe is 200dm, the diameter of the pipe is 5dm, the length of b is calculated to be 123.6dm, the length of a is 76.4dm, an ultrasonic flow rate sensor is embedded on the pipe, so that the position of a probe part 7 of a temperature sensor 2 is at the intersection point of a and b, one temperature sensor 2 is arranged on the inner side wall below the pipe at intervals of 20dm, a gas pump is arranged at the front end of the pipe, gas with the temperature of 30 ° is introduced into the inlet of the pipe at different flow rates, and the air temperature at different positions is monitored by the temperature sensor 2 on the inner side wall below the pipe, wherein the specific parameters are shown in table 1 below;

calculating the average temperature of the air in the tube body at different flow rates according to the table 1, and simultaneously recording the temperature parameters recorded by the probe of the temperature sensor 2 above the tube body, wherein the specific parameters are shown in the table 2 below;

as can be seen from the parameters in tables 1 and 2, the temperature value measured by the temperature sensor installed in the installation method in the present application is closest to the average temperature value of the fluid in the pipe body, and the effect achieved by a plurality of sensors can be achieved by installing one temperature sensor 2 without being restricted by the flow rate of the fluid.

In order to further test the influence of different factors on the accuracy of the temperature parameters measured at the installation position, six pipes are measured, the lengths of the six pipes are 200dm except for different diameters, air with the same temperature and flow rate is still introduced into the six pipes, the average temperature of the fluid in the six pipes and the temperature monitored at a specific position are measured according to the method, and the specific parameters are shown in the following table 3:

from the above table, it can be known that the difference between the temperature monitored by the specific position sensor probe and the average temperature becomes larger as the diameter of the pipe body becomes larger, that is, the specific installation position in the present application is influenced by the diameter of the pipe body, and it is presumed that the larger the diameter of the pipe body is, the larger the contact area between the fluid and the inside of the pipe body is, thereby accelerating the temperature loss, and when the diameter of the pipe body is less than one tenth of the length of the pipe body, the difference between the temperature monitored by the sensor probe and the average temperature is within an acceptable range, and when the diameter of the pipe body is less than one twentieth of the length of the pipe body, the difference between the temperature monitored by the sensor probe and the average temperature is almost zero, so that, in the range, the temperature monitored by the probe of the specific position sensor is closest to an average value, and the requirement for detecting the temperature of the fluid medium in the pipeline in the ultrasonic flow velocity sensor can be effectively met. The method comprises the following steps that the pipe body to be detected is preferably a straight pipe, the inner diameters of the pipe bodies are the same, a heat insulation layer is arranged on the outer side of each pipe body, the influence of the temperature of the external environment can be reduced as much as possible, the method further comprises the step S41, after the step S41 is carried out in the step 4, whether dirt adheres to the inner side wall of each pipe body is detected, if yes, the pipe body is cleaned, and if not, the step S5 is carried out, and the dirt is cleaned to reduce the influence on the flow speed of the fluid medium in the pipe body.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.