CN209280175U - Multiple range cascaded structure force snesor group in high precision - Google Patents
Multiple range cascaded structure force snesor group in high precision Download PDFInfo
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- CN209280175U CN209280175U CN201822088796.7U CN201822088796U CN209280175U CN 209280175 U CN209280175 U CN 209280175U CN 201822088796 U CN201822088796 U CN 201822088796U CN 209280175 U CN209280175 U CN 209280175U
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Abstract
The utility model belongs to materials mechanics experimental field of measuring technique, a kind of multiple range cascaded structure force snesor group of high-precision is provided, is made of pedestal, upper cover, load bar, a large amount range force sensor, high linearity spring, force transmission shaft, low amounts range force sensor.The utility model introduces the force snesor of small-range and large range stress sensor forms cascaded structure, can read simultaneously small-range and largely at sensor readings, the different measurement accuracy of correspondence.The high-quality spring of high linearity can play the role of pre-tightening balance starting force but also play the role of position limitation protection low amounts range force sensor; under conditions of increasing sealing structure protection; it is built-in to be used for subaqueous survey in pressure chamber's cavity, avoid the friction effects at load bar.The utility model is compact-sized, reasonable, reliable, structural stability is good, has overload protection, is airtight waterproof, easy to use at low cost, and the range of sensor can combine according to actual needs, can be suitably used for different Material Testing Machine and reinforcing measurement structure.
Description
Technical field
The utility model belongs to materials mechanics experimental field of measuring technique, is related to a kind of multiple range cascaded structure of high-precision
Force snesor group.
Background technique
Power (weighing) sensor is an essential measuring unit, single force snesor in materials mechanics experimental
There is different measurement accuracy, generally the 0.1% of maximum range in the experiment of different strength journeys.Thus wide range power (weighing)
The measurement accuracy that sensor compares lesser power compares lower.The measurement accuracy of power (weighing) sensor mainly by it is non-linear,
The influence of the indexs such as hysteresis quality, repeatability, and nonlinear indicator error is larger, often influences the master of force snesor synthesis precision
Want parameter.Linearity error is related to the range of power (weighing) sensor, under the identical linearity, power (weighing) sensor
Precision is dependent on the size of range, and range is bigger, and corresponding power (weighing) error is bigger, otherwise precision is higher.In practical survey
If power (weighing) sensor advantage using small-range is that measurement accuracy is very high, the disadvantage is that range narrow scope of application in amount.
It similarly, the use of the advantages of wide range power (weighing) sensor is applied widely, the disadvantage is that measurement accuracy is low.
The major function of universal testing machine is measuring force and deformation under conditions of simple tension or compression, is material
Expect the main tool of Mechanics Performance Testing, the measurement of power is directly related to the performance and precision of testing machine.Triaxial tests are research
One of the important means of soil deformation.In geotechnological triaxial tests, often the dynamometry only with a wide range passes a triaxial apparatus
Sensor, when carrying out small load test, side crops industry output signal very little, signal-to-noise ratio is low, and measurement error is big, it is difficult to ensure that acquisition
The accuracy of data.It is not only time-consuming if frequently replacing the force snesor of different ranges, it is at high cost, and increase test behaviour
The difficulty of work.Therefore in order to measure the high-precision force measured value under side crops industry, and wanting for measurement big load can be met simultaneously
It asks, it is necessary to be equipped with multi-range high-precision sensor group.Moreover, the frictional force in triaxial tests at load bar must also disappear
It removes, therefore to adapt to the demand of different experiments, using multiple range high-precision force snesor group to soil test measuring technology
It is of great significance.
The utility model is to use tandem composite construction to assemble a force snesor group, this composite construction sensor
Be built in pressure chamber's cavity, eliminate and rub at load bar, and it is compact-sized, reasonable, reliable, structural stability is good, has overload to protect
It is shield, airtight waterproof, easy to use at low cost, and the range of sensor can combine according to actual needs.
Utility model content
The utility model is low, a small amount of for the measurement accuracy of the testing of materials and the sensors of large measurement range power of other loading structures
Journey is unable to measure the contradictory problems of big load, and it is more that the utility model provides a kind of high-precision protected using spring and mechanical structure
The novel force snesor group of range cascaded structure.
The technical solution of the utility model are as follows:
In order to realize multiple range measurement, the utility model proposes it is a kind of protected using spring and mechanical structure it is high-precision
The novel force snesor group for spending multrirange cascaded structure, is made up of force snesor cascaded structure.Now passed with two power of series connection
For sensor, the detailed construction and working principle of the utility model is discussed in detail.The sensor group is by pedestal 1, upper cover 3, adds
Bar 5, large range stress sensor 6, high linearity spring 10, force transmission shaft 11, small-measuring range force transducer 12 is carried to form.
The small-measuring range force transducer is fixed in pedestal；The force transmission shaft is fixed on small-measuring range force transducer central axes
On, and sequentially pass through high linearity spring, pre-tighten plate, load bar；Force transmission shaft one end transfers force to small-measuring range force transducer, together
When to high linearity spring and load bar motion guide；Pass through the rigidity value of high linearity spring and the amount of small-measuring range force transducer
Journey calculates the decrement of spring, and then determines the shaft shoulder of load bar at a distance from sealing plate；It successively wears the load bar lower end
Sealing plate and upper cover are crossed, is connect with plate is pre-tightened；The preload plate and high linearity spring are in close contact, and contact position have it is certain
Pretightning force mainly balances the gravity of entire force snesor group and prevents force snesor group from loosening when working；It is described a large amount of
Range force sensor is fixedly connected with load bar, and entire force snesor group passes through loading head and sample contacts.
For fixation, the small-measuring range force transducer is fixed on the base by four hexagon socket head cap screws.
For the ease of adjusting and replacing, the force transmission shaft is threadedly secured on small-measuring range force transducer.
The high linearity spring is a kind of linear alloy spring, and coefficient of elasticity is related to selected transducer range, such as
Spring constant is k, and small transducer range is F1, and designing decrement allowable is x, then the minimum F1/k of coefficient of elasticity.Under load bar
End is connect by screw thread with plate is pre-tightened.
The sealing plate is fixed on upper lid by four soket head cap screws, closes load bar for matching with lip-type packing
Locate motion seal effect.Pedestal and upper cover compress O-ring seal after being connected by screw to, sealing prevents external water leakage at two
Come in.
The utility model has the following beneficial effects:
(1) the utility model can introduce the force snesor of small-range and large range stress sensor forms cascaded structure, can be same
When read small-range and largely at sensor readings, the different measurement accuracy of correspondence.
(2) it can play the role of pre-tightening balance starting force using the high-quality spring of high linearity but also to play position limitation protection a small amount of
The effect of range force sensor, it is built-in to be used for subaqueous survey in pressure chamber's cavity by the protection of sealing structure, avoid load
Friction effects at bar.
(3) the multiple range force snesor group of high-precision has well in material (containing rock-soil material) mechanical test using valence
Value.
Detailed description of the invention
Fig. 1 is tandem force snesor group structure chart；
In figure: 1 pedestal；2 O-ring seals；3 upper covers；4 sealing plates；5 load bars；6 large range stress sensors；7
Soket head cap screw；8 lip-type packings；9 pre-tighten plate；10 high linearity springs；11 force transmission shafts；12 small-measuring range force transducers；
13 loading heads；14 hexagon socket head cap screws.
Specific embodiment
The utility model is further elaborated below in conjunction with Figure of description.
A kind of novel force snesor group of the multiple range cascaded structure of high-precision is by small-measuring range force transducer (such as range
F1) and large range stress sensor (such as range F2, and F1, < F2) with assembled in series together, spring quilt after applying load
Compression, corresponding load value is detected by small sensor, when load is not above small-range range F1, small-measuring range force transducer and
Large range stress sensor works at the same time, and can acquire data, and when load reaches small-range F1, spring reaches maximum compressibility,
Load bar lower end is contacted with sealing plate, plays position-limiting action, i.e. load bar and sealing plate does not have relative displacement generation, small-range power
Sensor is protected, and only large range stress sensor works.Next the limit for mainly introducing small-measuring range force transducer is protected
Protect principle.
Small-measuring range force transducer 12 is fixed on pedestal 1, and load bar 5 transfers force to the high linearity bullet being in contact with it
On spring 10, by 10 power transmission of high linearity spring to force transmission shaft 11, it is then transmitted to small-measuring range force transducer 12.5 phase of load bar
For the displacement of sealing plate 4 be no more than high linearity spring 10 effective operating compression amount (load be no more than small-range when pair
The maximum compressibility answered, i.e. F1/k), i.e., 5 shaft shoulder of load bar is no more than high linearity spring 10 apart from 4 upper surface height of sealing plate
Effective operating compression amount.When installation, high linearity spring 10 is depended on by certain pretightning force, the size of pretightning force
In the weight of entirely series connection force snesor group；Apply pretightning force primarily to small-measuring range force transducer is allowed to have one and biography of connecting
The approximately equal initial value of sensor group weight prevents sensors in series group bring gravity to be applied on sample without being supervised
It surveys.And the problems such as pretightning force can also prevent in the long-term use process, and each component cooperation loosens.
Claims (7)
1. a kind of multiple range cascaded structure force snesor group of high-precision, it is characterised in that: including pedestal (1)；O-ring seal
(2)；Upper cover (3)；Sealing plate (4)；Load bar (5)；Large range stress sensor (6)；Soket head cap screw (7)；Lip-type packing
(8)；It pre-tightens plate (9)；High linearity spring (10)；Force transmission shaft (11)；Small-measuring range force transducer (12)；Loading head (13)；Interior six
Corner bolt (14)；
The small-measuring range force transducer (12) is fixed in pedestal (1)；The force transmission shaft (11) is fixed on small-measuring range force transducer
(12) it on central axes, and sequentially passes through high linearity spring (10), pre-tighten plate (9), load bar (5)；
Force transmission shaft (11) one end transfers force to small-measuring range force transducer (12), while to high linearity spring (10) and load bar
(5) motion guide；Spring is calculated by the rigidity value of high linearity spring (10) and the range of small-measuring range force transducer (12)
Decrement, and then determine load bar (5) the shaft shoulder at a distance from sealing plate (4)；Load bar (5) lower end sequentially passes through close
Sealing plate (4) and upper cover (3) are connect with plate (9) are pre-tightened；The preload plate (9) and high linearity spring (10) are in close contact, and are connect
Synapsis has certain pretightning force；The large range stress sensor (6) is fixedly connected with load bar (5), and entire force snesor group is logical
Cross loading head (13) and sample contacts.
2. the multiple range cascaded structure force snesor group of high-precision according to claim 1, it is characterised in that: described a small amount of
Range force sensor (12) is fixed on pedestal (1) by four hexagon socket head cap screws (14).
3. the multiple range cascaded structure force snesor group of high-precision according to claim 2, it is characterised in that: the power transmission
Axis (11) is threadedly secured on small-measuring range force transducer (12).
4. the multiple range cascaded structure force snesor group of high-precision according to claim 3, it is characterised in that: the high line
Property degree spring (10) be a kind of linear alloy spring, coefficient of elasticity depend on small transducer range, such as spring constant be k, it is small
Transducer range is F1, and designing decrement allowable is x, then the minimum F1/k of coefficient of elasticity.
5. the multiple range cascaded structure force snesor group of high-precision according to claim 3, it is characterised in that: load bar
(5) lower end is connect by screw thread with plate (9) are pre-tightened.
6. the multiple range cascaded structure force snesor group of high-precision according to claim 3, it is characterised in that: the sealing
Plate (4) is fixed on upper cover (3) by four soket head cap screws (7).
7. the multiple range cascaded structure force snesor group of high-precision according to claim 1, it is characterised in that: pedestal (1)
O-ring seal (2) are compressed after being connected by screw to upper cover (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822088796.7U CN209280175U (en) | 2018-12-13 | 2018-12-13 | Multiple range cascaded structure force snesor group in high precision |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822088796.7U CN209280175U (en) | 2018-12-13 | 2018-12-13 | Multiple range cascaded structure force snesor group in high precision |
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| CN209280175U true CN209280175U (en) | 2019-08-20 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109540347A (en) * | 2018-12-13 | 2019-03-29 | 苏州汇才土水工程科技有限公司 | The novel force snesor group of multiple range cascaded structure in high precision |
| CN112710418A (en) * | 2020-12-10 | 2021-04-27 | 苏州汇才土水工程科技有限公司 | Series sensor and measuring method |
| CN116164868A (en) * | 2023-02-21 | 2023-05-26 | 广州诺顶智能科技有限公司 | Crimping head multistage force detection mechanism and crimping machine |
-
2018
- 2018-12-13 CN CN201822088796.7U patent/CN209280175U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109540347A (en) * | 2018-12-13 | 2019-03-29 | 苏州汇才土水工程科技有限公司 | The novel force snesor group of multiple range cascaded structure in high precision |
| CN112710418A (en) * | 2020-12-10 | 2021-04-27 | 苏州汇才土水工程科技有限公司 | Series sensor and measuring method |
| CN112710418B (en) * | 2020-12-10 | 2022-02-22 | 苏州汇才土水工程科技有限公司 | Series sensor and measuring method |
| CN116164868A (en) * | 2023-02-21 | 2023-05-26 | 广州诺顶智能科技有限公司 | Crimping head multistage force detection mechanism and crimping machine |
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