CN201852660U - Heavy-load pressure/tension sensor - Google Patents

Heavy-load pressure/tension sensor Download PDF

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Publication number
CN201852660U
CN201852660U CN2010205553412U CN201020555341U CN201852660U CN 201852660 U CN201852660 U CN 201852660U CN 2010205553412 U CN2010205553412 U CN 2010205553412U CN 201020555341 U CN201020555341 U CN 201020555341U CN 201852660 U CN201852660 U CN 201852660U
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China
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hole
pressure
sensor
elastic frame
piezoelectrics
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Expired - Lifetime
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CN2010205553412U
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杨锦堂
李健
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杨锦堂
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Abstract

The utility model relates to a sensing system based on a force strain material, in particular to an integrated sensor system which can carry out pressure and tension detecting at the same time under heavy-load work environments. The heavy-load pressure/tension sensor comprises an elastic frame, wherein the elastic frame is provided with a hole, the side surface of the hole is provided with a through hole, and a fastening piece which is arranged on the elastic frame penetrates through the through hole; the hole is internally provided with a piezoelectric body, one end of the piezoelectric body is fixedly connected with the fastening piece, and the other end of the piezoelectric body is in contact with the inner wall of the hole which is opposite to the through hole. The sensor can be used for occasions in need of heavy/ultra-heavy load detecting, such as the pressure/tension detecting fields including buildings, heavy-duty machinery, bridges, hydraulic equipment, etc. The sensing system can prevent the problem that the sensor made from piezoelectric materials cannot be used for the application occasions of heavy/ultra-heavy load detecting due to limitation of the compression strength and tensile strength of the piezoelectric materials.

Description

Big load is pressed, pulling force sensor
Technical field
The utility model relates to a kind of sensor-based system based on the stress-strain material, relates in particular to a kind of integrated sensing system that can carry out the detection of pressure and pulling force simultaneously under big load working environment.
Background technology
The sensor field development has produced as pressing multiple sensors such as change, pressure drag and piezoelectricity rapidly.Particularly piezoelectric sensor development in the last few years rapidly.The principle of piezoelectric transducer is based on the piezoelectric effect of some crystalline material, present widely used piezoelectric has quartzy and high lead titanates etc., when mechanically deform takes place the effect of being stressed of these crystal, on its two relative sides, produce the charges of different polarity i.e. " piezoelectric effect ".Power-electric strong coupling the effect that is based on this piezoelectric owing to piezoelectric sensor is made, come perception to be subjected to the intensity of mechanical load by the intensity of directly obtaining electric signal, so this class sensor senses is highly sensitive, signal obtains conveniently, the sensor construction compactness is simple and direct, easy to use, be able to widespread use in various fields at present.But because piezoelectric belongs to hard brittle material, its resistance to compression and tensile strength are all lower, so utilize its piezoelectric sensor of making often can not bear big load.As a piezoelectric transducer in the market: CZ-YB series piezoelectric pressure indicator, its load-bearing capacity can only be tens kPas, thus the drawbacks limit of piezoelectric self intensity the application of piezoelectric sensor.And, since piezoelectric its draw, the piezoelectric property difference, the pressure and the pulling force integrated transducer that adopt single piezoelectric to make exist transducing signal inconsistent, the defective that the pull or press force test coverage bias is bigger has difficulties the integrated tension-compression sensor of manufacturing.
The utility model content
Technique effect of the present utility model can overcome above-mentioned defective, provides that a kind of big load is pressed, pulling force sensor, and its physical dimension is little, draws, pressure degree height, installs simple and easy.
For achieving the above object, the utility model adopts following technical scheme: it comprises elastic frame, and elastic frame is provided with the hole, and the side in hole is provided with openings, and the securing member that is arranged on the elastic frame runs through openings; Be provided with piezoelectrics in the hole, an end and the securing member of piezoelectrics are affixed, the hole inwall contact that the other end is relative with openings.
The elastic frame that is comprised in this utility model is center hollow out (hole an is set) structure, and the frame part around the hollow out is because its structure with stressed bending can produce corresponding elastic deformation according to pressure that is carried or pulling force.This elastic frame is convenient to and the convenient screw thread that is connected of outside force application mechanism on the sidewall of two ends up and down in addition.
The hole is preferably elliposoidal or spheroidal or the relative closed at both ends framework of two ends hollow out in addition, can certainly be arranged to other shape, as long as can place to advance piezoelectrics and can compress piezoelectrics under external force.The hole is provided with one at least, and an openings is set on each hole, different holes alternately in the upper end in hole or lower end or left end or right-hand member openings is set.Usually at the two ends up and down of elastic frame piezoelectrics are set all in the mechanism, wherein Shang Duan piezoelectrics place the hole of the hollow out on the elastic frame, the upper end piezoelectrics be subjected to force direction and outside apply draw or pressure direction consistent; Wherein the lower end piezoelectrics place the hole of the hollow out on the elastic frame, the lower end piezoelectrics be subjected to force direction and outside apply draw or pressure direction vertical.
Securing member is a fastening bolt, and fastening bolt is used for upper end piezoelectrics and lower end piezoelectrics are assemblied in the relevant position of elastic frame easily, and be used to adjust the fit-up gap and convenient fastening piezoelectrics in framework, can also be used for piezoelectrics are applied pretightning force.
According to " poisson effect ", when elastic frame pressure was enough big, the void structure cognition on the resilient bezel support body was extruded distortion, and the structure of corresponding hole part on the elastic frame is compressed at pressure direction, and it expands outwardly on the pressure at right angle direction simultaneously.At this moment, place the upper end piezoelectrics in the hole can bear pressure, and place lower end piezoelectrics in the hole to be loosened and do not bear pressure (or initial pretightning force can reduce).At this moment, the upper end piezoelectrics are under pressure and produce piezoelectric signal, and the size of this piezoelectric signal and suffered pressure size be corresponding relation, thereby can realize the effect of detected pressures.
In like manner, when the elastic frame pulling force was enough big, the void structure on the resilient bezel support body was known from experience the distortion that is stretched, and the structure of corresponding hole part on the elastic frame is extended at direction of pull, was tightened up on the vertical tension direction simultaneously.At this moment, place the lower end piezoelectrics in the hole can bear pressure, and place upper end piezoelectrics in the hole to be loosened and do not bear pressure (or initial pretightning force can reduce).At this moment, the lower end piezoelectrics are under pressure and produce piezoelectric signal, and the size of this piezoelectric signal and suffered pulling force size be corresponding relation, thereby can realize detecting the effect of pulling force.
The elastic frame centre position is provided with groove, is convenient to the action of pulling force or pressure.Piezoelectrics are power-electric form sensing material body or power-light form sensing material body or power-magnetic form sensing material body.
According to above analysis, the utility model sensor can pass through last piezoelectrics and lower piezoelectric body reciprocation, and perception puts on pressure or pulling force on the elastic frame.
Compared with prior art, the utlity model has following advantage:
1. realized simultaneously that pressure and pulling force detect, mechanism is simple, compact;
2. mechanism's good rigidly can adopt the lower sensing material of the limited piezoelectricity of bearing pressure or pulling force or other intensity to detect the pressure or the pulling force of heavy load or super large load; Volume can be less;
3. pressure and pulling force detect and all to have adopted applied pressure signal on piezoelectrics and realize, make the utility model for
Pressure and pulling force detect has stability and consistance;
4. parts assembling and easy for installation, the processing of parts, design size and rigging error can be regulated by erection bolt easily; Sensor is whole can be connected by screw thread is convenient with outside measured piece.
Sensor of the present utility model can be used for developing the occasion that requires test heavy load or super large load, as the pressure detection range of buildings, heavy-duty machinery, bridge, hydraulically operated equipment (HOE) etc.This sensor-based system can avoid piezoelectric can't be used for the application scenario that big load or super large loading force detect owing to the restriction of self resistance to compression and tensile strength makes made sensor.And institute's proposition sensor is the detection that a kind of integrated structure can realize pressure and pulling force simultaneously.This sensor has self structure intensity height, draws, presses two component detection, and it is big to detect the power scope, advantages such as detection is accurate, sensitivity.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is done detailed description:
Fig. 1 is the elastic frame structural representation;
Fig. 2 is embodiment 1 a sensor construction synoptic diagram of the present utility model;
Fig. 3 is the embodiment 1 sensor of the present utility model effect synoptic diagram that is stressed;
Fig. 4 is embodiment 1 a sensor tension power effect synoptic diagram of the present utility model;
Fig. 5 is embodiment 2 sensor construction synoptic diagram of the present utility model;
Fig. 6 is embodiment 3 sensor construction synoptic diagram of the present utility model;
Fig. 7 is embodiment 4 sensor construction synoptic diagram of the present utility model;
Fig. 8 is embodiment 5 sensor construction synoptic diagram of the present utility model;
Fig. 9 is embodiment 6 sensor construction synoptic diagram of the present utility model.
Among the figure: 1. elastic frame; 2. hole; 3. openings; 4. securing member; 5. piezoelectrics; 6. groove.
Embodiment
Embodiment 1
As Fig. 1, Fig. 2, Fig. 3, shown in Figure 4, sensor of the present utility model comprises elastic frame 1, and the two ends up and down of elastic frame 1 are provided with two holes 2, and the side in hole 2 is provided with openings 3, and the securing member 4 that is arranged on the elastic frame runs through openings 3; Be provided with piezoelectrics 5 in the hole 2, an end and the securing member 4 of piezoelectrics 5 are affixed, the hole inwall contact that the other end is relative with openings, and piezoelectrics 5 are power-electric form sensing material body.
Hole 2 is provided with an openings 3 for the elliposoidal of sealing on each hole 2, the hole 2 of upper end is provided with openings 3 in the upper end, and the hole 2 of lower end is provided with openings 3 at right-hand member, and promptly the piezoelectrics of upper and lower side are vertical setting.Elastic frame 1 centre position is provided with groove 6.Securing member 4 is a fastening bolt.
During work, when the sensor F effect that is under pressure, as shown in Figure 3, when pressure F was enough big, hole, elastic frame 1 corresponding upper end 2 structure compressive deformations were compressed in the direction that applies F power, and then the piezoelectrics 5 of compressing upper end, thereby produce electric signal based on piezoelectric effect, the power of this electric signal becomes corresponding relation with the size of F, promptly can provide the size of pressure F by the power that detects this electric signal.In the effect of F power simultaneously, hole, elastic frame 1 corresponding lower end 2 structure compressive deformations, with F power vertical direction on the structure of elastic frame 1 can extend out, and then loosen the piezoelectrics 5 of lower end, the effect that is not stressed this moment of the piezoelectrics 5 of lower end does not produce pressure signal.In this case, the utility model pressure-pulling force sensor only possesses the pressure sensing effect.
When sensor is subjected to pulling force f effect, as shown in Figure 4, when pressure f is enough big, the 2 structure tensions distortion of hole, elastic frame 1 corresponding lower end is elongated in the direction that applies f power, shrinks on the direction vertical with the direction of f power, and then compressing lower end piezoelectrics 5, thereby produce electric signal based on piezoelectric effect, the power of this electric signal becomes corresponding relation with the size of pulling force f, promptly can provide the size of pulling force f by the power that detects this generation electric signal.In the effect of f power simultaneously, hole, the corresponding upper end 2 structure tensions distortion of elastic frame 1, the structure of the elastic frame 1 on the direction consistent with f power can be upheld, and then loosens the piezoelectrics 5 of upper end, the effect that is not stressed this moment of the piezoelectrics 5 of upper end does not produce pressure signal.In this case, the utility model pressure-pulling force sensor only possesses the pull sensing effect.
So far, in conjunction with above two kinds of working forms, the sensor that is proposed has had the sensor function that can detect pressure, pulling force simultaneously.
In addition, because outside applied pressure F is applied to the elastic force F1 on the frame part in hole, upper end 2 of elastic frame and is applied to power F2 sum on the piezoelectrics 5 of upper end, be F=F1+F2, so for the fragility piezoelectric material body, we can be by appropriate structural design, according to the field of load F2 of upper end piezoelectrics 5, by changing structure and the size or the material of the frame part around the hole on the elastic frame 1, the F1 that allows to produce does respective change.After determining F1,, can know the size of outside applied pressure F by the size that detects F2 by demarcating the corresponding relation of F and F2.And, can pass through structural design, make F1>>F2, thereby realize the sensing material or the little range pressure sensor of small intensity, detect the function of big pressure load.
Equally, the pulling force f that applies when the outside is the elastic force f1 on the frame part that is applied to around the hole, lower end 2 of elastic deformation framework and is applied to power f2 sum on the lower end piezoelectrics 2, be f=f1+f2, equally for the fragility piezoelectric material body, we can be by appropriate structural design, according to the field of load f2 of lower piezoelectric body, can be by changing structure and the size or the material of hole, elastic frame lower end 2 frame part on every side, the f1 that allows to produce does respective change.After determining f1,, can know the size of the pulling force f that the outside applies by the size that detects f2 by demarcating the corresponding relation of f and f2.And, can pass through structural design, make f1>>f2, thereby realize the sensing material or the little range pressure sensor of small intensity, detect the function of big drag load.
Embodiment 2
As shown in Figure 5, only in the upper end of elastic frame 1 hole 2 is set, the upper end in hole 2 is provided with openings 3.Other is with embodiment 1.
Embodiment 3
As shown in Figure 6, only in the lower end of elastic frame 1 hole 2 is set, the left end in hole 2 is provided with openings 3.Other is with embodiment 1.
Embodiment 4
As shown in Figure 7, a hole 2 respectively is set at the upper/lower terminal of elastic frame 1, the closed at both ends that hole, upper end 2 is relative up and down, about relative two ends hollow out; The two ends hollow out that hole, lower end 2 is relative up and down, about relative closed at both ends.Like this, both can guarantee the pressure pulling force of piezoelectrics 5, be convenient to the making of parts again.Other is with embodiment 1.
Embodiment 5
As shown in Figure 8, the upper end of elastic frame 1 is provided with two holes 2, and the lower end is provided with 2, four holes, two holes and in position up and down openings 3 is set respectively, and the piezoelectrics 5 on the same horizontal direction are vertical setting.Other is with embodiment 1.
Embodiment 6
As shown in Figure 9, the upper end of elastic frame 1 is provided with two holes 2, and the lower end is provided with 2, four holes, two holes and in position up and down openings 3 is set respectively, and the piezoelectrics 5 on the same horizontal direction are set in parallel.Other is with embodiment 1.

Claims (7)

  1. One kind big load press, pulling force sensor, it is characterized in that comprise elastic frame, elastic frame is provided with the hole, the side in hole is provided with openings, the securing member that is arranged on the elastic frame runs through openings; Be provided with piezoelectrics in the hole, an end and the securing member of piezoelectrics are affixed, the hole inwall contact that the other end is relative with openings.
  2. 2. big load according to claim 1 is pressed, pulling force sensor, it is characterized in that, the hole is elliposoidal or spheroidal or the relative closed at both ends framework of two ends hollow out in addition.
  3. 3. big load according to claim 2 is pressed, pulling force sensor, it is characterized in that the hole is provided with one at least.
  4. 4. big load according to claim 3 is pressed, pulling force sensor, it is characterized in that, an openings is set on each hole, different holes alternately in the upper end or lower end or left end or right-hand member openings is set.
  5. 5. big load according to claim 4 is pressed, pulling force sensor, it is characterized in that the elastic frame centre position is provided with groove.
  6. 6. big load according to claim 1 is pressed, pulling force sensor, it is characterized in that securing member is a fastening bolt.
  7. 7. big load according to claim 1 is pressed, pulling force sensor, it is characterized in that piezoelectrics are power-electric form sensing material body or power-light form sensing material body or power-magnetic form sensing material body.
CN2010205553412U 2010-10-05 2010-10-05 Heavy-load pressure/tension sensor Expired - Lifetime CN201852660U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010205553412U CN201852660U (en) 2010-10-05 2010-10-05 Heavy-load pressure/tension sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010205553412U CN201852660U (en) 2010-10-05 2010-10-05 Heavy-load pressure/tension sensor

Publications (1)

Publication Number Publication Date
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102445288A (en) * 2010-10-05 2012-05-09 杨锦堂 Large-load pressure and pulling force sensor
CN103323155A (en) * 2013-05-31 2013-09-25 李建华 Tension sensor and system for container
CN103884455A (en) * 2012-12-20 2014-06-25 国家核电技术有限公司 Pulling force measuring device
CN104374497A (en) * 2014-11-20 2015-02-25 上海交通大学 Bidirectional force-measurement sensor system

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102445288A (en) * 2010-10-05 2012-05-09 杨锦堂 Large-load pressure and pulling force sensor
CN102445288B (en) * 2010-10-05 2013-07-17 杨锦堂 Large-load pressure and pulling force sensor
CN103884455A (en) * 2012-12-20 2014-06-25 国家核电技术有限公司 Pulling force measuring device
CN103884455B (en) * 2012-12-20 2015-11-25 国家核电技术有限公司 tension measuring device
CN103323155A (en) * 2013-05-31 2013-09-25 李建华 Tension sensor and system for container
CN103323155B (en) * 2013-05-31 2016-04-20 李建华 Container Special pull sensor and system
CN104374497A (en) * 2014-11-20 2015-02-25 上海交通大学 Bidirectional force-measurement sensor system

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AV01 Patent right actively abandoned

Granted publication date: 20110601

Effective date of abandoning: 20130717

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