CN101261108A - Spatial hole parameter measuring apparatus and measuring method - Google Patents

Abstract

The invention belongs to a measurement technique, relating to a space hole parameter measurement device used for fast and simply measuring the parameters of the space hole such as depth, angle and center coordinates, etc., and a detection method. The space hole parameter measurement device and the detection method adopt two ball rods with different lengths and corresponding software of the ball rods, measure the distance to three datum planes by inserting rods twice, and can fast and exactly obtain the center coordinates of an orifice, an elevation angle, an angle of inclination and the depth of the space hole at one time. The space hole parameter measurement device and the detection method have the simple device and the fast method, and are simpler and more exact, lower in cost and higher in efficiency compared with the original measurement device and the detection method, greatly reduce the labor intensity of the measurement personnel and improve the labor efficiency.

Description

A kind of spatial hole parameter measuring apparatus and detection method

Technical field

The invention belongs to measuring technique, relate to a kind of can rapid and simple measurement space hole depth, angle and isoparametric a kind of spatial hole parameter measuring apparatus of centre coordinate and detection method.

Background technology

The hydraulic valve that adopts on space flight, the aerial device, shell space hole are more.The measurement check of spatial hole is the important process and one of main difficult point after part processing is finished.The have living space degree of depth in aperture, hole centre coordinate, the elevation angle, corner and hole of the main measurement parameter of spatial hole.At present, hand dipping spatial hole aperture centre coordinate mainly adopts the method for line to try to achieve, this method has certain limitation, when the aperture is the rule circle, can ask comparatively accurate centre coordinate by method of scoring, and the spatial hole aperture is irregular, and the result that line obtains has certain error; Comparatively accurate measuring method is to adopt measuring machine to measure, but measurement expense is higher, efficient is relatively poor, is not easy on-the-spot the realization.What the elevation angle, corner and the degree of depth adopted is to insert with the check rod of tested gaging hole same diameter to test:

Measurement of elevation: two measurement faces that utilize bevel protractor and the surface at the outer circumference surface of the check rod of insertion and place, hole are fitted intact, and the reading of bevel protractor is exactly the numerical value at the elevation angle.

Outer corner measurement: angle block gauge is adjusted to the corner number of degrees of drawing or the number of degrees of corner complementary angle, part is placed on the angle block gauge, form the angle plane of the sturdy angle block gauge in plane of corner with the axis in hole, whether the height number that exposes the check rod two ends with the dial gauge inspection is consistent, if consistent, then the number of degrees value of angle block gauge is a corner, otherwise adjusts the angle of angle block gauge, height number unanimity up to the check rod two ends, the angle value of the angle block gauge of this moment is corner numerical value.

Depth survey: with the elevation direction of dial gauge slide calliper rule along the hole, measure the total length of the check rod that inserts and the protruded length behind the check rod patchhole respectively, two values are subtracted each other the degree of depth that can obtain the hole

Pasting plane, place, neat hole with the side of the plane briquetting on the height gauge is pressed on the measurement rod again, measure the distance of the periphery of rod respectively to reference field, utilize the point of theory of spatial hole again and measure excellent diameter, hand computation goes out the position dimension of spatial hole, but this method utilization is not the actual angle of spatial hole, the influence of compression block position, measuring error are too big, can only coarse verification.So the accurate measurement of spatial hole is the difficult point greatly of one on the measuring technique always.

Summary of the invention

A kind of spatial hole parameter measuring apparatus and the detection method that the purpose of this invention is to provide a kind of aperture centre coordinate, the elevation angle, corner and the degree of depth of accurately measurement space hole.Technical solution of the present invention is, the top of the standard bulb of measurement mechanism is a spheroid, is connected with the axis hole transition fit with an end of par, and the other end of par is threaded with sounding rod, and the center line of the measurer after assembling is finished is by the bulb centre of sphere.

One end of the version of described measurer or par is connected with the standard bulb with the axis hole transition fit, and the other end of par is threaded with sounding rod through supporting protective sleeve, and the center line of the measurer after assembling is finished is by the bulb centre of sphere.

Measurer is combined into independently measurer of length different two by standard bulb, par and sounding rod respectively, and the sounding rod of same diameter is divided into different two of length, and the length difference of two sounding rod is for measuring more than 10 times of aperture.

The diameter of sounding rod is more than or equal to the following difference of par diameter.

Support protective sleeve and be divided into two kinds of straight cover and taper sheaths.

It detects step,

(1) determines the diameter of sounding rod according to the diameter of want measured hole;

(2) when measured hole is stepped hole or taper hole, respectively standard bulb, par, support protective sleeve and measurement extension rod are assembled together, form two measurers different in size respectively, and measure the length overall and the bulb diameter of measurer, in the input counter; When measured hole is dark straight hole, respectively standard bulb, par and measurement extension rod are assembled together, form two measurers different in size respectively, and measure the length overall and the bulb diameter of measurer, in the input counter;

(3) will long measurer and loss of quantity tool successively insert in the hole that will measure at twice, and measure the ultimate range of bulb to three reference fields of measured piece, be input to and obtain needed measurement parameter in the parameter calculator.The computing formula that software for calculation adopts is:

Corner: $\mathrm{\&beta;}=\frac{180}{\mathrm{\&pi;}}\mathrm{Arc}\tan \left(\frac{|(2X2-D2)-(2X1-\mathrm{<figure-callout\; id="1"\; label="D"\; filenames="A20081008433700131.png"\; state="\{\{state\}\}">D</figure-callout>}1|}{|(2Y2-D2)-(2Y1-D1)|}\right)$ Wherein: D1 measures for loss of quantity tool and uses the bulb radius, D2 is a long gage measuring bulb radius, X1 measures with the distance of spherical surface apart from first reference field for loss of quantity tool, X2 is the long gage measuring distance of spherical surface apart from first reference field, Y1 measures with the distance of spherical surface apart from second reference field for loss of quantity tool, and Y2 is the distance of long gage measuring with second reference field of spherical surface distance.

The elevation angle:

$\mathrm{\&alpha;}=\frac{180}{\mathrm{\&pi;}}\mathrm{Arc}\tan \left(\frac{|(2H2-D2)-(2H1-D1)|}{\sqrt{{[(X2-\mathrm{<figure-callout\; id="2"\; label="D"\; filenames="A20081008433700131.png"\; state="\{\{state\}\}">D</figure-callout>}2/2)-(X1-\mathrm{<figure-callout\; id="1"\; label="D"\; filenames="A20081008433700131.png"\; state="\{\{state\}\}">D</figure-callout>}1/2)]}^2+{[(Y2-\mathrm{<figure-callout\; id="2"\; label="D"\; filenames="A20081008433700131.png"\; state="\{\{state\}\}">D</figure-callout>}2/2)-(Y1-\mathrm{<figure-callout\; id="1"\; label="D"\; filenames="A20081008433700131.png"\; state="\{\{state\}\}">D</figure-callout>}1/2)]}^2}}\right)$

Wherein: H1 measures with the distance of spherical surface apart from the 3rd reference field for loss of quantity tool, H2 is the distance of long gage measuring with the 3rd reference field of spherical surface distance, D1 measures for loss of quantity tool and uses the bulb radius, D2 is a long gage measuring bulb radius, X1 measures with the distance of spherical surface apart from first reference field for loss of quantity tool, X2 is the long gage measuring distance of spherical surface apart from first reference field, Y1 measures with the distance of spherical surface apart from second reference field for loss of quantity tool, and Y2 is the distance of long gage measuring with second reference field of spherical surface distance.

Hole depth:

L＝[L1-(H1-D1/2)/sinα-D1/2+L2-(H2-D2/2)/sinα-D2/2]/2

Wherein: H1 measures with the distance of spherical surface apart from the 3rd reference field for loss of quantity tool, H2 is the distance of long gage measuring with the 3rd reference field of spherical surface distance, D1 measures for loss of quantity tool and uses the bulb radius, D2 is a long gage measuring bulb radius, L1 is the total length of loss of quantity tool, and L2 is the total length of long measurer.

The X coordinate:

$X=\frac{(2H2-D2)(2X1-D1)-(2H1-D1)(2X2-D2)}{2(2H2-D2-2H1+D1)}$

Wherein: H1 measures with the distance of spherical surface apart from the 3rd reference field for loss of quantity tool, H2 is the distance of long gage measuring with the 3rd reference field of spherical surface distance, D1 measures for loss of quantity tool and uses the bulb radius, D2 is a long gage measuring bulb radius, X1 measures with the distance of spherical surface apart from first reference field for loss of quantity tool, and X2 is the long gage measuring distance of spherical surface apart from first reference field.

The Y coordinate:

$Y=\frac{(2H2-D2)(2Y1-D1)-(2H1-D1)(2Y2-D2)}{2(2H2-D2-2H1+D1)}$

Wherein: H1 measures with the distance of spherical surface apart from the 3rd reference field for loss of quantity tool, H2 is the distance of long gage measuring with the 3rd reference field of spherical surface distance, D1 measures for loss of quantity tool and uses the bulb radius, D2 is a long gage measuring bulb radius, Y1 measures with the distance of spherical surface apart from second reference field for loss of quantity tool, and Y2 is the distance of long gage measuring with second reference field of spherical surface distance.

The advantageous effect that the present invention has, the present invention adopts two ball rods different in size, mix corresponding software, measure the distance of three reference fields, can once draw the degree of depth in aperture centre coordinate, the elevation angle, inclination angle and the hole of spatial hole fast and accurately by twice inserted link.Apparatus of the present invention are simple, and method is quick, and it is easy, accurate to compare original measurement mechanism and method, and cost is low, the efficient height.Significantly reduce the labour intensity of survey crew, improved efficiency.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Work synoptic diagram when Fig. 2 measures for the present invention.

Embodiment

The top of the standard bulb 1 of measurement mechanism is a spheroid, is connected with the axis hole transition fit with an end of par 2, and the other end of par 2 is threaded with sounding rod, and the center line of the measurer after assembling is finished is by the bulb centre of sphere.

The version of described measurer or an end of par 2 are connected with standard bulb 1 with the axis hole transition fit, and the other end of par 2 is threaded with sounding rod 4 through supporting protective sleeve 3, and the center line of the measurer after assembling is finished is by the bulb centre of sphere.

Measurer is combined into independently measurer of length different two by standard bulb 1, par 2 and sounding rod respectively, and the sounding rod 4 of same diameter is divided into different two of length, and the length difference of two sounding rod 4 is for measuring more than 10 times of aperture.

The diameter of sounding rod 4 is more than or equal to the following difference of par 2 diameters.

Support protective sleeve 3 and be divided into two kinds of straight cover and taper sheaths.

It detects step,

(1) determines the diameter of sounding rod according to the diameter of want measured hole;

(2) when measured hole is stepped hole or taper hole, respectively standard bulb 1, par 2, support protective sleeve 3 and measurement extension rod are assembled together, form two measurers different in size respectively, and measure the length overall and the bulb diameter of measurer, in the input counter; When measured hole is dark straight hole, respectively standard bulb 1, par 2 and measurement extension rod are assembled together, form two measurers different in size respectively, and measure the length overall and the bulb diameter of measurer, in the input counter;

(3) will long measurer and loss of quantity tool successively insert in the hole that will measure at twice, and measure the ultimate range of bulb to three reference fields of measured piece, be input to and obtain needed measurement parameter in the parameter calculator.The computing formula that software for calculation adopts is:

Corner: $\mathrm{\&beta;}=\frac{180}{\mathrm{\&pi;}}\mathrm{Arc}\tan \left(\frac{|(2X2-D2)-(2X1-\mathrm{<figure-callout\; id="1"\; label="D"\; filenames="A20081008433700131.png"\; state="\{\{state\}\}">D</figure-callout>}1|}{|(2Y2-D2)-(2Y1-D1)|}\right)$ Wherein: D1 measures for loss of quantity tool and uses the bulb radius, D2 is a long gage measuring bulb radius, X1 measures with the distance of spherical surface apart from first reference field 8 for loss of quantity tool, X2 is the long gage measuring distance of spherical surface apart from first reference field 8, Y1 measures with the distance of spherical surface apart from second reference field 9 for loss of quantity tool, and Y2 is the distance of long gage measuring with second reference field 9 of spherical surface distance.

The elevation angle:

$\mathrm{\&alpha;}=\frac{180}{\mathrm{\&pi;}}\mathrm{Arc}\tan \left(\frac{|(2H2-D2)-(2H1-D1)|}{\sqrt{{[(X2-\mathrm{<figure-callout\; id="2"\; label="D"\; filenames="A20081008433700131.png"\; state="\{\{state\}\}">D</figure-callout>}2/2)-(X1-\mathrm{<figure-callout\; id="1"\; label="D"\; filenames="A20081008433700131.png"\; state="\{\{state\}\}">D</figure-callout>}1/2)]}^2+{[(Y2-\mathrm{<figure-callout\; id="2"\; label="D"\; filenames="A20081008433700131.png"\; state="\{\{state\}\}">D</figure-callout>}2/2)-(Y1-\mathrm{<figure-callout\; id="1"\; label="D"\; filenames="A20081008433700131.png"\; state="\{\{state\}\}">D</figure-callout>}1/2)]}^2}}\right)$

Wherein: H1 measures with the distance of spherical surface apart from the 3rd reference field 10 for loss of quantity tool, H2 is the distance of long gage measuring with the 3rd reference field 10 of spherical surface distance, D1 measures for loss of quantity tool and uses the bulb radius, D2 is a long gage measuring bulb radius, X1 measures with the distance of spherical surface apart from first reference field 8 for loss of quantity tool, X2 is the long gage measuring distance of spherical surface apart from first reference field 8, Y1 measures with the distance of spherical surface apart from second reference field 9 for loss of quantity tool, and Y2 is the distance of long gage measuring with second reference field 9 of spherical surface distance.

Hole depth:

L＝[L1-(H1-D1/2)/sinα-D1/2+L2-(H2-D2/2)/sinα-D2/2]/2

Wherein: H1 measures with the distance of spherical surface apart from the 3rd reference field 10 for loss of quantity tool, H2 is the distance of long gage measuring with the 3rd reference field 10 of spherical surface distance, D1 measures for loss of quantity tool and uses the bulb radius, D2 is a long gage measuring bulb radius, L1 is the total length of loss of quantity tool, and L2 is the total length of long measurer.

The X coordinate:

$X=\frac{(2H2-D2)(2X1-D1)-(2H1-D1)(2X2-D2)}{2(2H2-D2-2H1+D1)}$

Wherein: H1 measures with the distance of spherical surface apart from the 3rd reference field 10 for loss of quantity tool, H2 is the distance of long gage measuring with the 3rd reference field 10 of spherical surface distance, D1 measures for loss of quantity tool and uses the bulb radius, D2 is a long gage measuring bulb radius, X1 measures with the distance of spherical surface apart from first reference field 8 for loss of quantity tool, and X2 is the long gage measuring distance of spherical surface apart from first reference field 8.

The Y coordinate:

$Y=\frac{(2H2-D2)(2Y1-D1)-(2H1-D1)(2Y2-D2)}{2(2H2-D2-2H1+D1)}$

Wherein: H1 measures with the distance of spherical surface apart from the 3rd reference field 10 for loss of quantity tool, H2 is the distance of long gage measuring with the 3rd reference field 10 of spherical surface distance, D1 measures for loss of quantity tool and uses the bulb radius, D2 is a long gage measuring bulb radius, Y1 measures with the distance of spherical surface apart from second reference field 9 for loss of quantity tool, and Y2 is the distance of long gage measuring with second reference field 9 of spherical surface distance.

The composition of measurement mechanism:

The inclined hole measurement mechanism mainly is divided into measurer and software for calculation two parts.

Measurer is divided into a long and short two sounding rod, mainly is made up of four parts: standard bulb 1, par 2, support protective sleeve 3 and sounding rod 4.Right alignment will be got well after standard bulb 1, par 2 and sounding rod 4 assemblings were finished, and the center line that requires bar in principle is by the bulb centre of sphere.The sounding rod 4 of same diameter is divided into long sounding rod and short sounding rod, links to each other with par 2 by screw thread, and sounding rod 4 diameters generally more than or equal to the minimum diameter of par 2, are combined into two different measurers of length with other three part; Standard bulb 1 top is a spheroid that precision is higher, adopt the axis hole transition fit with par 2, par 2 cooperates a standard bulb 1 in principle, when the bulb of standard bulb 1 causes precision not high owing to wearing and tearing or other reason, and the standard bulb 1 that can more renew; Par 2 is connecting standard bulb 1 and sounding rod 4, and the length of par is determined according to the degree of depth of measured hole; Support protective sleeve 3 and be divided into two kinds of straight cover and taper sheaths, processed by soft materials such as organic glass or rubber, it cooperates with par 2; be stuck in tested metering-orifice aperture during measurement; the one, play a supporting role, improve measuring accuracy, the 2nd, the protection PRECISION HOLE is not scratched by measurer or damages.

Software for calculation will be imported the basic data of measurer and calculate and export measurement result with the measurement data that measures.

The method of inspection:

At first, determine to measure the diameter of extension rod according to the diameter of want measured hole, the accurate degree of depth of measured hole if desired, the diameter that needs to select to measure extension rod is identical with the hole; If only survey other parameter, do not need to fathom, select any measurement extension rod in the range ability all can.

Then, with standard bulb 1, par 2, support protective sleeve 3 and measure extension rod 4 and be assembled together and form two sounding rods different in size, and measure the length overall and the bulb diameter of rod, in the input counter.If the hole of measuring does not have stepped hole and be not taper hole, just need not to add and support protective sleeve 3.

Long and short par is successively inserted in the hole that will measure, and measure bulb, be input in the parameter calculator and can obtain parameters needed to ultimate range to three reference fields.

If the hole of measuring is single angle hole, and the angle of inclination in known hole, only need to insert a bar and measure the distance of bulb peak to reference field, can try to achieve the degree of depth in hole.

Detailed process:

Short sounding rod is inserted in the measured hole 5, measure distance X 1, Y1, the H1 of sphere to reference field 8,9,10, again long sounding rod is inserted in the measured hole 5, measure distance X 2, Y2, the H2 of sphere, measure the length of lacking sounding rod, long sounding rod and bulb diameter L1, L2, Φ D1, Φ D2 more respectively to reference field 8,9,10.With the numerical value of measuring, the short sounding rod parameter hurdle of Input Software, relevant position, long sounding rod parameter hurdle can obtain the degree of depth in this hole centre coordinate, the elevation angle, inclination angle and hole at calculating parameter.

Embodiment one

The measurement of aperture coordinate

1. according to the diameter and the degree of depth of measured hole, select two measurement extension rods different in size, assembly sounding rod, measure bulb diameter D1, D2 with standard bulb 1, par 2, support protective sleeve 3.

2. will lack par and insert in the measured hole, measure bulb respectively apart from distance X 1, Y1, the H1 of reference field 8,9,10.

3. long par is inserted in the measured hole, measure bulb respectively apart from distance X 1, Y1, the H2 of reference field 8,9,10.

4. measurement parameter D1, X1, Y1, the H1 that will lack sounding rod are input to position corresponding on the software interface.

5. measurement parameter D2, X2, Y2, H2 that will long sounding rod is input to position corresponding on the software interface.

6. software calculates the coordinate of measured hole according to formula.(can directly see result of calculation on the software interface)

The X coordinate:

$X=\frac{(2H2-D2)(2X1-D1)-(2H1-D1)(2X2-D2)}{2(2H2-D2-2\mathrm{<figure-callout\; id="1"\; label="H"\; filenames="A20081008433700131.png"\; state="\{\{state\}\}">H</figure-callout>}1+D1)}$

The Y coordinate:

$Y=\frac{(2H2-D2)(2Y1-D1)-(2H1-D1)(2Y2-D2)}{2(2H2-D2-2\mathrm{<figure-callout\; id="1"\; label="H"\; filenames="A20081008433700131.png"\; state="\{\{state\}\}">H</figure-callout>}1+D1)}$

Embodiment two

The measurement of elevation in hole

1. according to the diameter and the degree of depth of measured hole, select two measurement extension rods different in size, assembly sounding rod, measure bulb diameter D1, D2 with standard bulb 1, par 2, support protective sleeve 3.

2. will lack par and insert in the measured hole, measure bulb respectively apart from distance X 1, Y1, the H1 of reference field 8,9,10.

3. long par is inserted in the measured hole, measure bulb respectively apart from distance X 1, Y1, the H2 of reference field 8,9,10.

4. measurement parameter D1, X1, Y1, the H1 that will lack sounding rod are input to position corresponding on the software interface.

5. measurement parameter D2, X2, Y2, H2 that will long sounding rod is input to position corresponding on the software interface.

6. software calculates the elevation angle of measured hole according to formula.(can directly see result of calculation on the software interface)

$\mathrm{\&alpha;}=\frac{180}{\mathrm{\&pi;}}\mathrm{Arc}\tan \left(\frac{|(2H2-D2)-(2H1-D1)|}{\sqrt{{[(X2-\mathrm{<figure-callout\; id="2"\; label="D"\; filenames="A20081008433700131.png"\; state="\{\{state\}\}">D</figure-callout>}2/2)-(X1-\mathrm{<figure-callout\; id="1"\; label="D"\; filenames="A20081008433700131.png"\; state="\{\{state\}\}">D</figure-callout>}1/2)]}^2+{[(Y2-\mathrm{<figure-callout\; id="2"\; label="D"\; filenames="A20081008433700131.png"\; state="\{\{state\}\}">D</figure-callout>}2/2)-(Y1-\mathrm{<figure-callout\; id="1"\; label="D"\; filenames="A20081008433700131.png"\; state="\{\{state\}\}">D</figure-callout>}1/2)]}^2}}\right)$

Embodiment three

The outer corner measurement in hole

1. according to the diameter and the degree of depth of measured hole, select two measurement extension rods different in size, assembly sounding rod, measure bulb diameter D1, D2 with standard bulb 1, par 2, support protective sleeve 3.

2. will lack par and insert in the measured hole, measure bulb respectively apart from distance X 1, the Y1 of reference field 8,9.

3. long par is inserted in the measured hole, measure bulb respectively apart from distance X 1, the Y1 of reference field 8,9.

4. measurement parameter D1, X1, the Y1 that will lack sounding rod are input to position corresponding on the software interface.

5. measurement parameter D2, X2, Y2 that will long sounding rod is input to position corresponding on the software interface.

6. software calculates the elevation angle of measured hole according to formula.(can directly see result of calculation on the software interface)

$\mathrm{\&beta;}=\frac{180}{\mathrm{\&pi;}}\mathrm{Arc}\tan \left(\frac{|(2X2-D2)-(2X1-\mathrm{<figure-callout\; id="1"\; label="D"\; filenames="A20081008433700131.png"\; state="\{\{state\}\}">D</figure-callout>}1|}{|(2Y2-D2)-(2Y1-D1)|}\right)$

Embodiment four

The depth survey in hole

1. according to the diameter and the degree of depth of measured hole, select two measurement extension rods different in size, assembly sounding rod, the length overall of measurement rod and bulb diameter L1, L2, D1, D2 with standard bulb 1, par 2, support protective sleeve 3.

2. will lack par and insert in the measured hole, measure bulb respectively apart from the distance H 1 of reference field 10.

3. long par is inserted in the measured hole, measure bulb respectively apart from the distance H 2 of reference field 10.

4. measurement parameter D1, L1, the H1 that will lack sounding rod are input to position corresponding on the software interface.

5. measurement parameter D2, L2, H2 that will long sounding rod is input to position corresponding on the software interface.

6. software is according to formula

L=[L1-(H1-D1/2)/sin α-D1/2+L2-(H2-D2/2)/sin α-D2/2]/2 calculate the elevation angle of measured hole.

Claims (7)

1. spatial hole parameter measuring apparatus, it is characterized in that, the top of the standard bulb (1) of measurement mechanism is a spheroid, be connected with the axis hole transition fit with an end of par (2), the other end of par (2) is threaded with sounding rod (4), and the center line of the measurer after assembling is finished is by the bulb centre of sphere.

2. a kind of spatial hole parameter measuring apparatus according to claim 1; it is characterized in that; one end of par (2) is connected with standard bulb (1) with the axis hole transition fit; the other end of par (2) is threaded with sounding rod (4) through supporting protective sleeve (3), and the center line of the measurer after assembling is finished is by the bulb centre of sphere.

3. a kind of spatial hole parameter measuring apparatus according to claim 1, it is characterized in that, measurer is combined into independently measurer of length different two by standard bulb (1), par (2) and sounding rod (4) respectively, the sounding rod of same diameter (4) is divided into different two of length, and the length difference of two sounding rod is for measuring more than 10 times of aperture.

4. a kind of spatial hole parameter measuring apparatus according to claim 1 is characterized in that the diameter of sounding rod (4) is more than or equal to the following difference of par (2) diameter.

5. a kind of spatial hole parameter measuring apparatus according to claim 1 is characterized in that, supports protective sleeve (3) and is divided into two kinds of straight cover and taper sheaths.

6. detection method of utilizing the described spatial hole parameter measuring apparatus of claim 1, it detects step and is,

(1) determines the diameter of sounding rod (4) according to the diameter of want measured hole;

(2) when measured hole is stepped hole or taper hole, respectively standard bulb (1), par (2), support protective sleeve (3) and measurement extension rod (4) are assembled together, form two measurers different in size respectively, and measure the length overall and the bulb diameter of measurer, in the input software for calculation; When measured hole is dark straight hole, respectively standard bulb (1), par (2) and measurement extension rod (4) are assembled together, form two measurers different in size respectively, and measure the length overall and the bulb diameter of measurer, in the input software for calculation;

(3) will long measurer and loss of quantity tool successively insert in the hole that will measure at twice, and measure the ultimate range of bulb to three reference fields of measured piece, be input to and obtain measurement parameter in the software for calculation.

7. a kind of spatial hole parameter measurement detection method according to claim 6 is characterized in that, the computing formula that software for calculation adopts is:

Corner: $\mathrm{\&beta;}=\frac{180}{\mathrm{\&pi;}}\mathrm{Arc}\tan \left(\frac{|(2X2-D2)-(2X1-D1)|}{|(2Y2-D2)-(2Y1-D1)|}\right)$

The elevation angle:

$\mathrm{\&alpha;}=\frac{180}{\mathrm{\&pi;}}\mathrm{Arc}\tan \left(\frac{|(2H2-D2)-(2H1-D1)|}{\sqrt{{[(X2-D2/2)-(X1-D1/2)]}^2+{[(Y2-D2/2)-(Y1-D1/2)]}^2}}\right)$

Hole depth:

L＝[L1-(H1-D1/2)/sinα-D1/2+L2-(H2-D2/2)/sinα-D2/2]/2

The X coordinate:

$X=\frac{(2H2-D2)(2X1-D1)-(2H1-D1)(2X2-D2)}{2(2H2-D2-2H1+D1)}$

The Y coordinate:

$Y=\frac{(2H2-D2)(2Y1-D1)-(2H1-D1)(2Y2-D2)}{2(2H2-D2-2H1+D1)}.$

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