阅读说明：本技术 气压微距法内径测量装置及其控制方法 (Inner diameter measuring device adopting air pressure microspur method and control method thereof ) 是由 张培祥 陈泳超 李炀 林强 黄庚杰 于 2021-09-24 设计创作，主要内容包括：本发明提供了一种气压微距法内径测量装置,包括：稳压气源提供单元,用于提供稳定气压；连接于所述稳压气源提供单元后的三通分流器,用于将气流分为第一路气流及第二路气流；设置于所述第一路气流上的第一n路分流器；n个压力传感器,其中,所述第一n路分流器的每一路的正向气压分别施加到每一压力传感器的正端；设置于所述第二路气流上的第二n路分流器；设置于所述第二n路分流器后端每一路的调节阀；柱状检测端,其包括空心立柱,对称设置于所述空心立柱表面两侧的n对泄气口,经所述调节阀调节后形成负向气压分别施加到每一压力传感器的负端以及每一对泄气口上；中央处理单元,用于根据压力差数据,获取对应位置泄气口的内径。(The invention provides an inner diameter measuring device by an air pressure microspur method, which comprises: the stable pressure air source providing unit is used for providing stable air pressure; the three-way flow divider is connected behind the pressure-stabilizing air source providing unit and is used for dividing the air flow into a first path of air flow and a second path of air flow; the first n paths of flow dividers are arranged on the first path of airflow; n pressure sensors, wherein the positive air pressure of each of the first n shunts is applied to the positive terminal of each pressure sensor, respectively; the second n paths of flow dividers are arranged on the second path of airflow; the regulating valve is arranged at each path of the rear end of the second n paths of the shunts; the columnar detection end comprises a hollow upright post and n pairs of air leakage openings symmetrically arranged on two sides of the surface of the hollow upright post, and negative air pressure is formed after the negative air pressure is regulated by the regulating valve and is respectively applied to the negative end of each pressure sensor and each pair of air leakage openings; and the central processing unit is used for acquiring the inner diameter of the air leakage opening at the corresponding position according to the pressure difference data.)

1. An inner diameter measuring device by a gas pressure microspur method is characterized by comprising:

the stable pressure air source providing unit is used for providing stable air pressure;

the three-way flow divider (12) is connected behind the pressure-stabilizing air source providing unit and is used for dividing the air flow into a first path of air flow and a second path of air flow;

the first n paths of flow dividers (13) are arranged on the first path of airflow, wherein n is the number of the flow dividers of the first n paths of flow dividers (13) and is more than or equal to 2;

n pressure sensors (14), wherein the positive air pressure of each of the first n-way flow divider (13) is applied to the positive terminal of each pressure sensor (14) respectively;

a second n-way flow divider (15) arranged on the second air flow;

the regulating valve (16) is arranged at each path of the rear end of the second n paths of the flow dividers (15);

the columnar detection end (18) comprises a hollow upright post (181), and n pairs of air release ports (184) which are symmetrically arranged on two sides of the surface of the hollow upright post (181), wherein negative air pressure formed after the adjustment of the adjusting valve (16) is respectively applied to the negative end of each pressure sensor (14) and each pair of air release ports (184);

a data acquisition unit (20) for acquiring pressure difference data of each pressure sensor (14);

and the central processing unit (21) is used for acquiring the inner diameter of the air leakage port (184) at the corresponding position according to the pressure difference data.

2. The apparatus according to claim 1, wherein the pressure-stabilized gas supply unit comprises a gas supply (10) and a pressure stabilizer (11).

3. The barometric macro inner diameter measurement device according to claim 1, wherein the cylindrical detection end (18) further comprises two grooves (183) arranged on the surface of the hollow upright (181), and the grooves (183) are symmetrically arranged along a direction parallel to the length direction of the hollow upright (181).

4. The air pressure macro-method inner diameter measurement device according to claim 3, wherein the air relief port (184) is provided at one side of the groove (183).

5. The air pressure macro-method inner diameter measurement device according to claim 4, wherein the distance between the air release ports (184) is 5mm to 15 mm.

6. The barometric macro inner diameter measurement device according to claim 1, further comprising an audible and visual alarm (23) for alarming when the inner diameter value exceeds a set range.

7. The barometric macro inner diameter measurement device according to claim 1, wherein the pressure of the forward barometric pressure is a MPa; the negative air pressure is 1/2-1/4A MPa, and the value of A is 0.5-1.

8. A method for controlling an inside diameter measuring apparatus according to any one of claims 1 to 7, comprising the steps of:

s1, will have a first standard radius R₁And has a second standard radius R₂The second workpiece is sleeved on the columnar detection end (18) for testing to obtain the voltage difference delta V of the columnar detection end₁And Δ V₂And a first standard radius R₁Smaller than the second standard radius R₂；

S2, establishing the voltage difference delta V₁And Δ V₂And a first standard radius R₁And the second standard radius R₂The linear relationship of (a);

s3, sleeving the workpiece to be detected on the columnar detection end (18) to obtain the voltage difference delta Vx of the workpiece to be detected;

and S4, acquiring the inner diameter of the workpiece to be measured according to the voltage difference delta Vx and the linear relation.

9. A method for controlling an inside diameter measuring apparatus according to claim 8, wherein the step of obtaining the voltage difference Δ Vx of the workpiece to be measured comprises:

while the voltage difference Δ Vx data of the n pressure sensors (14).

10. The method for controlling the inner diameter measuring device according to claim 9, wherein the step of obtaining the inner diameter of the workpiece to be measured according to the voltage difference Δ Vx and the linear relationship comprises:

and simultaneously acquiring n-point inner diameter data of the workpiece to be measured along the radial direction.

Technical Field

The invention relates to an inner diameter measuring device by an air pressure microspur method and a control method thereof.

Background

Currently, the measurement of the inner bore diameter is generally performed using an inner diameter gauge (inner diameter gauge). However, the inside diameter gauges are manually tested, the measurement speed is slow, and automatic testing cannot be realized.

Disclosure of Invention

The invention provides an inner diameter measuring device by an air pressure microspur method and a control method thereof, which can effectively solve the problems.

The invention is realized by the following steps:

the invention provides an inner diameter measuring device by an air pressure microspur method, which comprises:

the stable pressure air source providing unit is used for providing stable air pressure;

the three-way flow divider is connected behind the pressure-stabilizing air source providing unit and is used for dividing the air flow into a first path of air flow and a second path of air flow;

the first n paths of flow dividers are arranged on the first path of airflow, wherein n is the number of the flow dividing paths of the first n paths of flow dividers and is more than or equal to 2;

n pressure sensors, wherein the positive air pressure of each of the first n shunts is applied to the positive terminal of each pressure sensor, respectively;

the second n paths of flow dividers are arranged on the second path of airflow;

the regulating valve is arranged at each path of the rear end of the second n paths of the shunts;

the columnar detection end comprises a hollow upright post and n pairs of air leakage openings symmetrically arranged on two sides of the surface of the hollow upright post, wherein negative air pressure is formed after the adjustment of the adjusting valve and is respectively applied to the negative end of each pressure sensor and each pair of air leakage openings;

the data acquisition unit is used for acquiring pressure difference data of each pressure sensor;

and the central processing unit is used for acquiring the inner diameter of the air leakage opening at the corresponding position according to the pressure difference data.

As a further improvement, the stabilized air supply providing unit includes an air supply and a stabilizer.

As a further improvement, the cylindrical detection end further comprises two grooves arranged on the surface of the hollow upright, and the grooves are symmetrically arranged along the length direction parallel to the hollow upright.

As a further improvement, the air release opening is arranged on one side of the groove.

As a further improvement, the distance between the air leakage openings is 5 mm-15 mm.

As a further improvement, the device further comprises an audible and visual alarm, and an alarm is given when the inner diameter value exceeds a set range.

As a further improvement, the pressure of the positive air pressure is A MPa; the negative air pressure is 1/2-1/4 MPa.

The invention further provides a control method of the inner diameter measuring device by the air pressure microspur method, which comprises the following steps:

s1, will have a first standard radius R₁And has a second standard radius R₂The second workpiece is sleeved on the columnar detection end for testing to obtain the voltage difference delta V of the columnar detection end₁And Δ V₂And a first standard radius R₁Smaller than the second standard radius R₂；

S2, establishing the voltage difference delta V₁And Δ V₂And a first standard radius R₁And the second standard radius R₂The linear relationship of (a);

s3, sleeving the workpiece to be detected on the columnar detection end to obtain a voltage difference delta Vx of the workpiece to be detected;

and S4, acquiring the inner diameter of the workpiece to be measured according to the voltage difference delta Vx and the linear relation.

As a further improvement, the step of acquiring the voltage difference Δ Vx of the workpiece to be measured includes:

and simultaneously the voltage difference delta Vx data of the n pressure sensors.

As a further improvement, the step of obtaining the inner diameter of the workpiece to be measured according to the voltage difference Δ Vx and the linear relationship includes:

and simultaneously acquiring n-point inner diameter data of the workpiece to be measured along the radial direction.

The invention has the beneficial effects that: the inner diameter measuring device by the air pressure microspur method provided by the invention is discharged from 2 symmetrical air vents and leaks outwards through a gap between the inner wall of the workpiece and the hollow upright post, so that a corresponding pressure difference delta is generated by the pressure sensor, the pressure difference corresponds to a gap S between the inner wall of the workpiece and the hollow upright post, the pressure difference is converted into a voltage V through the pressure sensor, and then a corresponding numerical value is converted through AD sampling, namely the inner diameter d of the workpiece. The inner diameter measuring device adopting the air pressure microspur method can realize accurate, automatic and rapid measurement of the inner diameter of the workpiece to be measured by combining the mechanical arm. In addition, the inner diameter measuring device adopting the air pressure microspur method can also obtain n-point inner diameter data of the workpiece to be measured along the radial direction, so that the working efficiency is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of an inner diameter measurement device by a gas pressure microspur method according to an embodiment of the present invention.

Fig. 2 is a linear relationship diagram of voltage and inner diameter in the inner diameter measuring device by the air pressure macro method according to the embodiment of the invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Referring to fig. 1, an embodiment of the present invention provides an inner diameter measuring device by an air pressure microspur method, including:

the stable pressure air source providing unit is used for providing stable air pressure;

the three-way flow divider 12 is connected behind the pressure-stabilizing air source providing unit and is used for dividing the air flow into a first path of air flow and a second path of air flow;

a first n-path flow divider 13 disposed on the first path of air flow, where n is the number of the flow dividing paths of the first n-path flow divider 13 and is greater than or equal to 2;

n pressure sensors 14, wherein the positive air pressure of each of the first n-way flow divider 13 is applied to the positive terminal of each pressure sensor 14;

a second n-way flow divider 15 disposed on the second air flow;

the regulating valve 16 is arranged at each path of the rear end of the second n paths of flow dividers 15;

the columnar detection end 18 comprises a hollow upright column 181 and n pairs of air leakage openings 184 symmetrically arranged on two sides of the surface of the hollow upright column 181, wherein negative air pressure formed after the adjustment of the adjusting valve 16 is respectively applied to the negative end of each pressure sensor 14 and each pair of air leakage openings 184;

a data acquisition unit 20 for acquiring pressure difference data of each pressure sensor 14;

and the central processing unit 21 is used for acquiring the inner diameter of the air leakage port 184 at the corresponding position according to the pressure difference data.

Further, the regulated air supply unit includes an air supply 10 and a regulator 11.

In one embodiment, n is 4, that is, the number of the branches of the first n-way splitter 13 is 4. Accordingly, 4 pressure sensors 14-1/14-2/14-3/14-4 are included, wherein the positive air pressure of each of the first n-way flow splitter 13 is applied to the positive terminal of each pressure sensor 14-1/14-2/14-3/14-4, respectively. And each pressure sensor 14-1/14-2/14-3/14-4 is connected to the data acquisition unit 20, respectively. In addition, the number of the branch paths of the second n-path flow divider 15 is also 4, and the second n-path flow divider corresponds to 4 regulating valves 16-1/16-2/16-3/16-4. The negative air pressure resulting from the regulation of each regulator valve 16-1/16-2/16-3/16-4 is applied to the negative terminal of each pressure sensor 14-1/14-2/14-3/14-4, respectively. In addition, the negative air pressure formed after the regulation of each regulating valve 16-1/16-2/16-3/16-4 is respectively applied to each pair of air release ports 184-1/184-2/184-3/184-4. Each pair of air vents 184-1/184-2/184-3/184-4 comprises two symmetrically arranged air vents.

Further, the cylindrical detection end 18 further includes two grooves 183 disposed on the surface of the hollow column 181, and the grooves 183 are symmetrically disposed along a length direction parallel to the hollow column 181. The groove 183 is 1-2mm wide and 1-5mm deep and is mainly used for air leakage.

Further, the relief port 184 is disposed on one side of the groove 183. Further, the distance between the air release openings 184 is 5 mm-15 mm, so that mutual interference can be avoided. Preferably, the distance between the air leakage openings 184 is 8mm to 10 mm. In one embodiment, the spacing between the air vents 184 is 10 mm.

Further, the air pressure microspur method inner diameter measuring device further comprises an audible and visual alarm 23, and when the inner diameter value exceeds a set range, an alarm is given. Further, the inner diameter measuring device by the air pressure microspur method further comprises a voice unit 24 for counting.

It will be appreciated that the positive air pressure and the negative air pressure may have values that are too large or too small, which may affect the accuracy of the measurement. Therefore, preferably, the pressure of the positive air pressure is A MPa; the negative air pressure is 1/2-1/4A MPa, the value of A is preferably 0.5-1 MPa, and the negative air pressure is greater than or equal to the atmospheric pressure. Specifically, in one embodiment, the maximum measurement range a is about 0.6MPa, and the negative barometric pressure of the reference value is about one third, that is, about 0.2 MPa.

In addition, the inner diameter measuring device by the air pressure microspur method provided by the invention can further comprise a manipulator (not shown in the figure) which is used for clamping, replacing and rotating the workpiece by an angle, so that the inner diameter of multiple points on the same height of the workpiece can be rapidly measured. That is, the inner diameter measuring device of the air pressure macro method measures the inner diameters of multiple points at different heights at one time, and the inner diameters of different points at the same height can be measured by rotation, so that whether the inner diameters of the whole surface of the workpiece are regular or not can be judged. The angle of each rotation is not limited, and can be set according to the measurement precision of actual needs, which is not described in detail herein. In one embodiment, the angle of each rotation is 20-30 degrees.

The embodiment of the invention further provides a control method of the inner diameter measuring device by the air pressure microspur method, which comprises the following steps:

s1, will have a first standard radius R₁And has a second standard radius R₂The second workpiece is sleeved on the columnar detection end 18 for testing to obtain the voltage difference delta V of the columnar detection end₁And Δ V₂And a first standard radius R₁Smaller than the second standard radius R₂；

S2, establishing the voltage difference delta V₁And Δ V₂And a first standard radius R₁And the second standard radius R₂The linear relationship of (a);

s3, sleeving the workpiece to be detected on the columnar detection end 18 to obtain a voltage difference delta Vx of the workpiece to be detected;

and S4, acquiring the inner diameter of the workpiece to be measured according to the voltage difference delta Vx and the linear relation.

Referring to fig. 2, in steps S1 and S2, the symmetrical 2 air vents leak outwards through the gap between the inner wall of the workpiece and the hollow upright post, so that the pressure sensor generates a corresponding pressure difference Δ, which corresponds to the gap S between the inner wall of the workpiece and the hollow upright post, and the pressure difference is converted into a voltage V by the pressure sensor. Due to the first standard radius R₁And the second standard radius R₂Is a known parameter, and therefore, the voltage difference Δ V can be obtained₁And Δ V₂And a first standard radius R₁And the second standard radius R₂The linear relationship of (c).

Further, the step of acquiring the voltage difference Δ Vx of the workpiece to be measured includes:

while the voltage difference Δ Vx data of the n pressure sensors 14.

Further, the step of obtaining the inner diameter of the workpiece to be measured according to the voltage difference Δ Vx and the linear relation includes:

and simultaneously acquiring n-point inner diameter data of the workpiece to be measured along the radial direction.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.