CN105784271A - Calibration device and method for three-component-force sensor - Google Patents

Abstract

The invention discloses a calibration device and method for a three-component-force sensor. The calibration device comprises a supporting seat, a beam rotationally connected to the supporting seat through a rotary shaft, hanger iron movably connected to the beam, a single-component-force sensor which is fixedly installed on the beam and is accurately calibrated, a base relatively fixed to the supporting seat in position, the to-be-calibrated three-component-force sensor arranged below the single-component-force sensor, a laser range finder used for measuring the value x of the distance between the gravity center of the hanger iron and the central axis of the rotary shaft, a gradienter capable of being connected to the beam in a transverse moving mode and measuring the included angle theta between the beam and the horizontal line, a data acquisition system connected with both the single-component-force sensor and the three-component-force sensor, and a data processing system connected with the data acquisition system, the laser range finder and the gradienter. The force measurement end of the three-component-force sensor is connected with that of the single-component-force sensor through a vertically-tightened rope. The calibration device and method can precisely and rapidly calibrate three-component-force sensors of different sizes and specifications in the direction x, the direction y and the direction z.

Description

Calibration device and calibration method for three-component force sensor

technical field

The invention relates to the fields of ocean engineering and mechanical engineering, in particular to a calibration device and a calibration method for three-component force sensors of different sizes in x, y, and z directions used in experiments of ships and ocean engineering.

Background technique

In the fields of naval and marine engineering and mechanical engineering, experiments play an increasingly important role. Experimental results can not only test the results of theoretical analysis, but also serve as the basis for testing numerical simulation methods, and continuously optimize the numerical simulation model. Therefore, experiments have become an indispensable part of scientific research and engineering. The collection of data, especially the collection of force is an important part of the experiment. The collection of force data is very important in wind wave and current experiments, slamming experiments, and structural strength verification experiments. At this stage, the force is measured by a three-component force sensor or a single-component force sensor. The sensor must be calibrated before use. Through calibration, laboratory personnel can obtain a static calibration curve, determine the corresponding relationship between the electrical output of the sensor and the measured force, and calculate the linear coefficient for use in the data acquisition system.

However, at this stage, the sensor calibration devices and methods of laboratories and engineering units have many problems such as poor accuracy, complicated operation, and inability to realize multi-directional calibration of multi-range and multi-size range sensors. In addition, most calibration devices do not have data processing systems.

These problems are specifically manifested in:

1) Since the calibration work is not only related to the characteristics of the instrument itself, but also to many specific factors such as the connection, installation, and layout of the instrument, and is also interfered by various environmental factors, which makes many calibration devices have poor accuracy.

2) The design of the fixing part of many calibration devices is unreasonable, so that the sensors of specific specifications can only be fixed in one direction, so that the multi-directional calibration of multi-range and multi-size range sensors cannot be realized.

3) Many laboratories use the method of directly placing or hanging weights on the sensor for calibration, which leads to continuous addition of weights during the calibration process, making the calibration operation very complicated and prone to errors.

4) The calibration devices of many three-component force sensors do not have integrated data processing devices, causing the experimenters to manually record the magnitude of the electrical signal and force, and then calculate the static calibration curve later. This also complicates the calibration process. At the same time, this also leads to a large loss of calibration time, which affects the progress of the test.

Contents of the invention

The object of the present invention is: to solve the above technical problems, to propose a calibration device and calibration method for a three-component force sensor, so as to accurately and quickly calibrate three-component force sensors of different sizes and models in the three directions of x, y, and z.

The technical solution of the present invention is: the calibration device of the described three-component force sensor, comprising:

Support base;

A crossbeam extending horizontally along the X-axis direction, the middle part of the crossbeam is rotatably connected to the support seat through a rotating shaft extending along the Y-axis direction;

a hanging iron that is connected to the beam and can move laterally along the length direction of the beam;

A single-component force sensor that is fixedly installed on the beam and has been accurately calibrated, and the hanging iron and the single-component force sensor are respectively arranged on the left and right opposite sides of the rotating shaft;

A base relatively fixed to the position of the support seat, on which a three-component force sensor fixing structure for fixing various types of three-component force sensors is arranged;

The three-component force sensor to be calibrated arranged below the single-component force sensor, the three-component force sensor) is detachably fixed on the base through the three-component force sensor fixing structure, and its force-measuring end is passed through the vertical A straight and tight rope is connected to the force-measuring end of the single-component force sensor;

A laser rangefinder for measuring the distance x between the center of gravity of the hanging iron and the central axis of the rotating shaft, the laser rangefinder is installed on the beam and located at the rotating shaft;

A spirit level that is laterally movable and connected to the crossbeam and capable of measuring the angle θ between the crossbeam and the horizontal line;

A data acquisition system connected to both the single-component force sensor and the three-component force sensor, the data acquisition system acquires the measured force value F' of the single-component force sensor and the measured force value of the three-component force sensor, and converting the measured force value of the single-component force sensor into a corresponding mechanical and electrical signal value U' for external output, and converting the measured force value of the three-component force sensor into a corresponding mechanical and electrical signal value U for external output; and

A data processing system connected to the data acquisition system, the laser range finder and the level meter, the data processing system receives the mechanical electrical signal value U' output by the data acquisition system and the mechanical electrical signal value U, the The distance value x from the center of gravity of the hanging iron to the central axis of the rotating shaft measured by the laser range finder, the angle θ between the beam and the horizontal line measured by the level meter, and the data processing system can be based on the received mechanical and electrical signals The value U' calculates the measured force value F' of the single-component force sensor, and at the same time, it can be input in advance according to the distance x received from the center of gravity of the hanging iron to the central axis of the rotating shaft, and the angle θ between the beam and the horizontal line. The weight G of the hanging iron in the data processing system calculates the theoretical force value F in the vertical direction of the three-component force sensor.

On the basis of the above-mentioned technical solutions, the calibration device of the present invention also includes the following preferred solutions:

The data processing system is capable of displaying the mechanical electrical signal value U', the measured force value F' of the single-component force sensor, the mechanical electrical signal value U, and the vertical direction theory of the three-component force sensor. Display unit for force value F.

The base includes a horizontally arranged bottom plate and a vertical plate fixed vertically above the bottom plate, and the three-component force sensor fixing structure includes 8 vertical through holes for passing screws made on the bottom plate, made in 8 horizontal through holes for passing screws on the vertical plate.

The diameters of the vertical through holes and the horizontal through holes are both 5mm.

Among the 8 vertical through holes, 4 vertical through holes are arranged on the periphery of the other 4 vertical through holes, and the 4 vertical through holes on the inside and the 4 vertical through holes on the periphery are both Distributed in a rectangle; among the 8 horizontal through holes, 4 horizontal through holes are arranged on the periphery of the other 4 horizontal through holes, and the 4 horizontal through holes on the inside and the 4 horizontal through holes on the periphery are all in the shape of rectangular distribution.

The crossbeam includes a left half part from the central axis of the rotating shaft to the left end face of the crossbeam and a right half part from the central axis of the rotating shaft to the right end face of the crossbeam. Three marking lines, these three marking lines divide the left half of the crossbeam into four hanging iron moving intervals with the same length.

The lengths of the left half and the right half are equal, and the single component force sensor is arranged at the right end of the beam.

The data processing system is a single chip microcomputer.

The method for calibrating the three-component force sensor by using the above-mentioned calibrating device of the present invention comprises the following steps:

Step 1, moving the position of the hanging iron on the beam until the indication of the laser range finder is zero;

Step 2, by adjusting the lateral position of the spirit level on the crossbeam, the crossbeam is adjusted to the level;

Step 3: Connect the force-measuring end of the three-component force sensor to be calibrated with the force-measuring end of the single-component force sensor with a rope, and tighten the rope;

Step 4, by adjusting the lateral position of the level on the beam, the beam is adjusted to the level again;

Step 5. Move the hanging iron laterally to a certain position, and read the mechanical and electrical signal value U' displayed on the data processing system, the value of the single-component force sensor after the indication of the level gauge is stable. The measured force value F', the mechanical and electrical signal value U and the theoretical force value F in the vertical direction of the three-component force sensor;

Step 6. Compare the measured force value F' of the single-component force sensor in step 5 with the theoretical force value F in the vertical direction of the three-component force sensor. If the measured force value F of the single-component force sensor is ' is within 1% of the theoretical force value F in the vertical direction of the three-component force sensor, then the theoretical force value F in the vertical direction of the three-component force sensor is calibrated with the mechanical and electrical signal value U ; If the difference between the measured force value F' of the single-component force sensor and the theoretical force value F in the vertical direction of the three-component force sensor is greater than 1%, then repeat the steps five and six;

Step 7, repeating the steps 5 and 6 to obtain a calibration curve of the value U of the mechanical electrical signal and the theoretical force value F in the vertical direction of the three-component force sensor.

The advantages of the present invention are:

1. The calibration device of the present invention utilizes the principle of leverage. By moving the position of the hanging iron, the calibrated three-component force sensor is subjected to different magnitudes of pulling force, so as to realize the calibration of the three-component force sensor in three directions, and is equipped with data with accurate correction function. The processing system has the advantages of high measurement accuracy, time saving and high efficiency, convenient installation without loading and unloading, and simple data processing.

2. The base is provided with a three-component force sensor fixing structure capable of fixing various models and sizes, so that the calibration device can calibrate three-component force sensor fixing structures of different models and sizes.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

Fig. 1 is the general assembly drawing of this calibration device of the embodiment of the present invention;

Figure 2 is an exploded view of such a calibration device according to an embodiment of the present invention;

Fig. 3 is a schematic diagram of the calibration of such a calibration device according to an embodiment of the present invention;

Figure 4 is an assembly diagram of the three-component force sensor and the base when calibrating the Z direction of a large-size three-component force sensor with a diameter of 100mm;

Figure 5 is an assembly diagram of the three-component force sensor and the base when calibrating the X direction of a small-size three-component force sensor with a diameter of 50mm;

Among them: 1-support seat, 2-rotating shaft, 3-beam, 4-hanging iron, 5-single-component force sensor, 6-three-component force sensor, 7-rope, 8-base, 9-laser range finder, 10 -Level, 11-data acquisition system, 12-data processing system, 13-single component force sensor mount, 14-screw;

a- the connection point between the three-component force sensor and the rope when measuring the force in the Z direction, b- the vertical through hole used to fix the large size sensor, c- the vertical through hole used to fix the small size sensor, d- the X The connection point between the three-component force sensor and the rope during directional force measurement, e- the horizontal through hole used to fix the large-sized sensor, f- the horizontal through-hole used to fix the small-sized sensor.

detailed description

Figures 1 to 3 show a specific embodiment of the calibration device of the three-component force sensor of the present invention, the device mainly includes a support base 1, a beam 3, a hanging iron 4, and a single-component force sensor 5 that has been accurately calibrated , a three-component force sensor 6 to be calibrated, a rope 7, a base 8, a laser range finder 9, a level 10, a data acquisition system 11 and a data processing system 12. in:

The bottom surface of the support base 1 is a plane, which is stably placed on the test bench during the calibration test. The crossbeam 3 is horizontally extended and arranged along the X-axis direction, and the middle part of the crossbeam 3 is rotatably connected to the support base 1 through the rotating shaft 2, wherein the axis of the rotating shaft 2 is arranged along the Y-axis direction, so that the crossbeam 3 can be around the rotating shaft 2 (or Say around the Y axis) in the X-Z plane. Moreover, the central axis of the rotating shaft 2 intersects the length axis of the beam 3 . The hanging iron 4 is movably connected on the cross beam 3 , and the hanging iron 4 can move laterally along the length direction of the cross beam 3 . In this example, a nesting hole is formed on the hanging iron 4 , and it is slidably connected to the crossbeam 3 through the nesting hole, and the center of gravity of the hanging iron 4 is located on the length axis of the crossbeam 3 . The single-component force sensor 5 has been accurately calibrated, and the single-component force sensor 5 and the hanging iron 4 are respectively arranged on the left and right opposite sides of the rotating shaft 2, wherein the single-component force sensor 5 is specifically passed through the single-component force sensor. The mounting base 13 is fixed on the right end of the beam 3, and the force-measuring end of the single-component force sensor 5 is arranged vertically downward. The three-component force sensor 6 is the calibration object of the device, which is fixed on the base 8 and located directly below the single-component force sensor 5 . The force measuring end of the three-component force sensor 6 is vertically tightened (that is, the length of the rope 7 is extended along the Z-axis direction, but it should be noted that the rope 7 will be completely vertical when the crossbeam 3 is in a completely horizontal state. Straight) said rope 7 is connected with the force-measuring end of said single-component force sensor 5. The position of the base 8 and the support base 1 is relatively fixed, and the base 8 includes a horizontally arranged bottom plate 81 and a vertically fixed vertical plate 802 above the bottom plate 801, and the vertical plate 802 above the bottom plate 801 is made of stainless steel. The base 8 is provided with a three-component force sensor fixing structure for fixing various models and sizes of three-component force sensors. The above-mentioned three-component force sensor 6 is detachably fixed on the base 8 through the three-component force sensor fixing structure. .

In this example, the specific structural form of the three-component force sensor fixing structure is as follows: it includes 8 vertical through holes for passing the screws 14 made on the bottom plate 801 and 8 vertical through holes made on the vertical plate 802. There are 8 horizontal through holes for threading screws, and the diameters of the vertical through holes and the horizontal through holes are both 5mm. Among the 8 vertical through holes, 4 vertical through holes are arranged on the periphery of the other 4 vertical through holes, and the 4 vertical through holes on the inside and the 4 vertical through holes on the periphery are both distributed in a rectangular shape. Among the 8 horizontal through holes, 4 horizontal through holes are arranged on the periphery of the other 4 horizontal through holes, and the 4 horizontal through holes on the inside and the 4 horizontal through holes on the periphery are distributed in a rectangular shape. For example: when the device is used to calibrate a large-scale three-component force sensor such as a three-component force sensor with a diameter of 100mm, use the four horizontal through holes on the periphery or the four vertical through holes on the periphery to cooperate with screws to fix the three-component force sensor , to prevent the three-component force sensor from loosening in either direction. When the device is used to calibrate a small-sized three-component force sensor such as a three-component force sensor with a diameter of 50 mm, the three-component force sensor is fixed by using the 4 horizontal through holes on the inner side or the 4 vertical through holes on the inner side with screws to prevent The 3-component force sensor is loose in either direction. If the Z-direction of the three-component force sensor is calibrated, the Z-direction force-measuring end of the three-component force sensor is arranged vertically upwards and connected with the rope 7; if the Y-direction of the three-component force sensor is calibrated, the three-component force sensor is made The Y-direction force-measuring end of the component force sensor is arranged vertically upward and connected to the rope 7 . If the X-direction of the three-component force sensor is calibrated, the X-direction force-measuring end of the three-component force sensor is arranged vertically upward and connected to the rope 7 .

Figure 4 is an assembly drawing of the three-component force sensor and the base 8 when calibrating the Z direction of a large-size three-component force sensor with a diameter of 100mm. In this figure, the Z-direction force-measuring end of the three-component force sensor is arranged vertically upward , fix the bottom of the three-component force sensor by using four vertical through holes on the periphery to cooperate with screws. Point a in the figure is the connection point between the three-component force sensor and the rope when measuring force in the Z direction, point b in the figure is the vertical through hole for fixing the large-size sensor, and point c in the figure is the hole for fixing the small-size sensor Vertical through hole.

Figure 5 is an assembly drawing of the three-component force sensor and the base 8 when calibrating the X direction of a small-sized three-component force sensor with a diameter of 50mm. In this figure, the X-direction force-measuring end of the three-component force sensor is arranged vertically upward , use the 4 horizontal through holes on the inner side to cooperate with screws to fix the side part of the three-component force sensor. The point d in the figure is the connection point between the three-component force sensor and the rope when measuring the force in the X direction, the point e in the figure is the horizontal through hole for fixing the large-size sensor, and the point f in the figure is the horizontal hole for fixing the small-size sensor through hole.

The laser range finder 9 is installed on the crossbeam 3 and is located at the rotating shaft 2, which is used to measure the distance x between the center of gravity of the hanging iron 4 and the central axis of the rotating shaft 2, and can measure The distance value x between the center of gravity of the hanging iron and the central axis of the rotating shaft is output outward. Apparently, the central axis of the rotating shaft 2 is also the rotational centerline of the beam 3 . In this example, the laser rangefinder 9 is specifically arranged at the side of the middle of the beam 3 .

The level 10 is connected to the crossbeam 3 through clamps and bolts, and the level 10 can move laterally along the crossbeam 3 to correct the levelness of the crossbeam 3 by utilizing the principle of leverage. At the same time, the spirit level 10 can measure the angle θ between the beam 3 and the horizontal line, and can output the measured angle θ between the beam 3 and the horizontal line to the outside. In this example, the level 10 is specifically arranged on the top surface of the middle part of the beam 3 .

The data acquisition system 11 is not only connected to the single-component force sensor 5, but also connected to the three-component force sensor 6, which can obtain the measured force value F' of the single-component force sensor 5 and the three-component force The measured force value of the sensor 6, and convert the measured force value of the single-component force sensor 5 into the corresponding mechanical and electrical signal value U' to output outward, and convert the measured force value of the three-component force sensor 6 into the corresponding mechanical The value U of the electrical signal is output to the outside.

The data processing system 12 is a single-chip microcomputer system, which is connected with the data acquisition system 11, the laser rangefinder 9 and the level meter 10, and the data processing system 12 receives the mechanical and electrical signal value U' output by the data acquisition system 11 and the mechanical electrical signal value U, the distance value x from the center of gravity of the hanging iron measured by the laser range finder 9 to the central axis of the rotating shaft, the crossbeam 3 and the horizontal line (that is, the X axis) measured by the level meter 10 , and can calculate the measured force value F' of the single-component force sensor 5 according to the mechanical-electrical signal value U' received by it (because the single-component force sensor 5 is accurately calibrated in advance, its U '-F' correspondence is known), and at the same time, it can input the hanging iron in the data processing system 12 in advance according to the distance value x from the center of gravity of the hanging iron to the central axis of the rotating shaft and the angle θ between the beam 3 and the horizontal line. 4 to calculate the theoretical force value F of the three-component force sensor 6 in the vertical direction.

The theoretical force value F in the vertical direction of the three-component force sensor 6 is also the vertical component of the force on the three-component force sensor, which is also the force we need to calibrate.

According to the geometric-mechanical calculation, the calculation process is a conventional technology in the field of mechanics, so it will not be repeated here. It can be seen that the theoretical force value of the three-component force sensor 6 in the vertical direction F=[(1.49+2.02*sinθ-0.19*cosθ)/ (2.626*cosθ+4.3635*sinθ)]*G*x*10 ^-3 . The force F' of the single-component force sensor 5 = [(1.49*cosθ+2.02*sinθ-0.19)/(2.626*cosθ+4.3635*sinθ)]*G*x*10 ^-3 .

When θ=0, F=F'=G*x/2020, which is consistent with the reality, which shows the correctness of the formula derivation.

And in this example, the data processing system 12 has a display unit, which can display the mechanical electrical signal value U', the measured force value F' of the single component force sensor 5, the mechanical electrical signal value U and the theoretical force value F in the vertical direction of the three-component force sensor 6 .

The crossbeam 3 includes the left half part from the central axis of the rotating shaft 2 to the left end face of the crossbeam and the right half part from the central axis of the rotating shaft 2 to the right end face of the crossbeam, and the left half part and the right half part equal in length. The left half is provided with three marking lines 3a evenly spaced along the length direction of the crossbeam 3, and these three marking lines 3a divide the left half of the crossbeam 3 into four hanging iron moving sections with the same length.

In this way, during the lateral movement of the hanging iron 4, from the left end face of the crossbeam 3 to the center of the crossbeam, there are successively the range of the first gear, the range of the second gear, the range of the third gear and the range of the fourth gear. Use the first gear to measure the three-component force sensor with the largest range, and use the fourth gear to measure the three-component force sensor with the smallest range. Specifically in this embodiment, the material of the hanging iron 4 is AISI4130 steel, the density is 7.85*103kg/m3, and the volume is 1.3346463*107mm3, so its dead weight G=(1.336463*10-2)*(7.85*103) *9.8N=1026.746N. In this way, according to the principle of leverage "G*x=T*OF", where T is the tension of the rope 7, O is the rotation center of the crossbeam, and OF is the moment arm of T, we can calculate:

The range of the fourth gear calibration force is: 0～256.6865N;

The range of the third gear calibration force is: 256.6865～513.373N;

The range of the second gear calibration force is: 513.373～770.0595N;

The range of the calibration force of the first gear is: 770.0595～1026.746N.

Through the calculation, the calculation process is a conventional technique in the field of mechanics, so it will not be repeated here. It can be known that the moment arm of T

Referring again to Figures 1 to 3, the method for calibrating the three-component force sensor using the calibration device of this embodiment will be briefly introduced as follows. The method includes the following steps:

Step 1, moving the position of the hanging iron 4 on the beam 3 until the indication of the laser range finder 9 is zero. For the convenience of operation, generally, the hanging iron 4 is moved to the middle of the beam 2, and then the position of the hanging iron 4 is fine-tuned until the indication of the laser range finder 9 is zero.

Step 2. By adjusting the horizontal position of the level 10 on the beam 3, the beam is adjusted to be horizontal, that is, the angle θ between the beam 3 and the horizontal line (that is, the X-axis) is 0.

Step 3: Connect the force-measuring end of the three-component force sensor 6 to be calibrated with the force-measuring end of the single-component force sensor 5 with a rope 7, and tighten the rope 7. The length of the rope 7 extends vertically along the Z axis.

Step 4, by fine-tuning the lateral position of the level 10 on the crossbeam 3, the crossbeam is adjusted to the level again.

Step 5, move the hanging iron 4 laterally to a certain position of the crossbeam 3, and read the mechanical and electrical signal value U' displayed on the data processing system 12 after the indication of the level meter 10 is stable The measured force value F' of the single-component force sensor 5, the value U of the mechanical electrical signal and the theoretical force value F of the three-component force sensor 6 in the vertical direction.

Step 6: Compare the measured force value F' of the single-component force sensor 5 in step 5 with the theoretical force value F of the three-component force sensor 6 in the vertical direction. If the difference between the measured force value F' of the single-component force sensor 5 and the theoretical force value F in the vertical direction of the three-component force sensor 6 is within 1%, the vertical force value of the three-component force sensor 6 The theoretical force value F of the direction and the value U of the mechanical electrical signal are calibrated, that is, according to the theoretical force value F in the vertical direction of the three-component force sensor 6 and the corresponding value U of the mechanical electrical signal, draw a graph on the U-F image corresponding calibration points. If the measured force value F' of the single-component force sensor 5 and the theoretical force value F in the vertical direction of the three-component force sensor 6 differ by more than 1%, then repeat steps five and six (change the hanging iron 4 in position on beam 3).

Step 7. Repeat steps 5 and 6 multiple times to obtain multiple calibration points. Each calibration point corresponds to a set of mechanical and electrical signal values U and the theoretical force value F in the vertical direction of the three-component force sensor. These calibration points are sequentially connected with smooth lines to obtain a calibration curve of the mechanical and electrical signal value U and the theoretical force value F of the three-component force sensor 6 in the vertical direction.

Certainly, the above-mentioned embodiments are only for illustrating the technical conception and characteristics of the present invention, and the purpose is to enable people to understand the content of the present invention and implement it accordingly, and not to limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit of the main technical solutions of the present invention shall fall within the protection scope of the present invention.

Claims (9)

1. the caliberating device of a component sensor, it is characterised in that this device includes:

Supporting seat (1)；

Along the crossbeam (3) of the horizontal-extending layout of X-direction, by extending along Y direction, the middle part of this crossbeam (3) arranges that rotating shaft (2) is rotatably connected on described supporting seat (1)；

It is connected to described crossbeam (3) upper and can along the extension ferrum (4) of the length direction transverse shifting of this crossbeam；

It is fixedly mounted on described crossbeam (3) and is arranged in by single component sensor (5) of accurate calibration, described extension ferrum (4) and this list component sensor (5) left and right two opposite sides of described rotating shaft (2)；

With the relatively-stationary base in the position (8) of described supporting seat (1), this base (8) is provided with the three component fixing structure of sensors for fixing various model three component sensor；

It is arranged in the three component sensors (6) to be calibrated of described single component sensor (5) lower section, this three component sensor (6) is removably attached on described base (8) by described three component fixing structure of sensors, and its dynamometry end is connected with the dynamometry end of described single component sensor (5) by the rope (7) vertically tightened；

For measuring the laser range finder (9) of distance value x between center of gravity and the axis of described rotating shaft (2) of described extension ferrum (4), it is upper and be positioned at described rotating shaft (2) place that this laser range finder (9) is arranged on described crossbeam (3)；

Described crossbeam (3) can be connected to transverse shifting and go up and can measure the level indicator (10) of the angle theta between this crossbeam (3) and horizontal line；

The data collecting system (11) being all connected with described single component sensor (5) and three component sensors (6), this data collecting system (11) obtains the institute dynamometry value F ' of described single component sensor (5) and institute's dynamometry value of described three component sensors (6), and convert institute's dynamometry value of single component sensor (5) to corresponding mechanics signal of telecommunication numerical value U ' and outwards export, institute's dynamometry value of three component sensors (6) is converted to corresponding mechanics signal of telecommunication numerical value U and outwards exports；And

nullWith described data collecting system (11)、The data handling system (12) that laser range finder (9) and level indicator (10) are all connected with，This data handling system (12) receives described mechanics signal of telecommunication numerical value U ' and the described mechanics signal of telecommunication numerical value U that described data collecting system (11) exports、Extension ferrum (4) center of gravity measured by described laser range finder (9) is to the distance value x of rotating shaft (2) axis、Crossbeam (3) measured by described level indicator (10) and the angle theta between horizontal line，And data handling system (12) can calculate the institute dynamometry value F ' of described single component sensor (5) according to the mechanics signal of telecommunication numerical value U ' that it receives，Simultaneously can according to the distance value x of its extension ferrum (4) center of gravity received to rotating shaft (2) axis、Angle theta between crossbeam (3) and horizontal line、The deadweight G pre-entering the extension ferrum (4) in this data handling system (12) calculates the vertical direction theory stress value F of described three component sensors (6).

2. the caliberating device of three component sensors according to claim 1, it is characterised in that: described data handling system (12) has the display unit of the vertical direction theory stress value F that can show described mechanics signal of telecommunication numerical value U ', the institute dynamometry value F ' of described single component sensor (5), described mechanics signal of telecommunication numerical value U and described three component sensors (6).

3. the caliberating device of three component sensors according to claim 1, it is characterized in that: described base (8) includes horizontally disposed base plate (81) and is vertically fixed on the riser (802) of this base plate (801) top, described three component fixing structure of sensors include being formed on 8 vertical through holes that being used on described base plate (801) wears screw, 8 horizontal through hole for wearing screw being formed on described riser (802).

4. the caliberating device of three component sensors according to claim 3, it is characterised in that: the aperture of described vertical through hole and horizontal through hole is 5mm.

5. the caliberating device of three component sensors according to claim 3, it is characterized in that: in 8 described vertical through holes, wherein 4 vertical through holes are arranged in the periphery of other 4 vertical through holes, and the 4 of inner side vertical through holes and the peripheral all rectangular distribution of 4 vertical through holes；In 8 described horizontal through hole, wherein 4 horizontal through hole are arranged in the periphery of other 4 horizontal through hole, and the 4 of inner side horizontal through hole and the peripheral all rectangular distribution of 4 horizontal through hole.

6. the caliberating device of three component sensors according to claim 1, it is characterized in that: described crossbeam (3) includes the left-half by described rotating shaft (2) axis to crossbeam left side and the right half part by described rotating shaft (2) axis to crossbeam right side, being provided with three graticules (3a) along the distribution of crossbeam (3) length direction uniform intervals in described left-half, the left-half of crossbeam (3) is divided into the extension ferrum moving section that four segment length are consistent by these three graticules (3a).

7. the caliberating device of three component sensors according to claim 6, it is characterised in that: the length of described left-half and right half part is equal, and described single component sensor (5) is arranged in the right part of described crossbeam (3).

8. the caliberating device of three component sensors according to claim 1, it is characterised in that: described data handling system (12) is single-chip microcomputer.

9. one kind utilizes the method that the caliberating device as described in any claim in claim 1～8 demarcates three component sensors, it is characterised in that the method comprises the following steps:

Step one, the mobile described extension ferrum (4) position on described crossbeam (3), until the registration of described laser range finder (9) is zero；

Step 2, by regulating described level indicator (10) lateral attitude on described crossbeam (3), described crossbeam is adjusted to level；

The dynamometry end of three component sensors (6) to be calibrated is connected with the dynamometry end of described single component sensor (5), and makes this rope (7) tighten by step 3, use rope (7)；

Step 4, by regulating described level indicator (10) lateral attitude on described crossbeam (3), described crossbeam is again adjusted to level；

Ferrum (4) is hung to a certain position described in step 5, transverse shifting, after the registration of described level indicator (10) is stable, read the vertical direction theory stress value F of the described mechanics signal of telecommunication numerical value U ' of the upper display of described data handling system (12), the institute dynamometry value F ' of described single component sensor (5), described mechanics signal of telecommunication numerical value U and described three component sensors (6)；

The institute dynamometry value F ' of single component sensor (5) described in step 6, the comparison step five and vertical direction theory stress value F of described three component sensors (6), if the vertical direction theory stress value F of the institute dynamometry value F ' of described single component sensor (5) and described three component sensors (6) differs within 1%, then the vertical direction theory stress value F of described three component sensors (6) and described mechanics signal of telecommunication numerical value U is demarcated；If the vertical direction theory stress value F of the institute dynamometry value F ' of described single component sensor (5) and described three component sensors (6) differs by more than 1%, then repeating said steps five and step 6；

Step 7, repeating said steps five and step 6, obtain the calibration curve of described mechanics signal of telecommunication numerical value U and the vertical direction theory stress value F of described three component sensors (6).