CN111006580A - Deformation detecting system of scaffold - Google Patents
Deformation detecting system of scaffold Download PDFInfo
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- CN111006580A CN111006580A CN201911422328.1A CN201911422328A CN111006580A CN 111006580 A CN111006580 A CN 111006580A CN 201911422328 A CN201911422328 A CN 201911422328A CN 111006580 A CN111006580 A CN 111006580A
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- strain gauge
- plate
- scaffold
- deformation
- long plate
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
- G01B7/18—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge using change in resistance
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- General Physics & Mathematics (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The invention discloses a deformation detection system of a scaffold, which comprises the scaffold and also comprises: the two ends of the elastic long plate are fixedly connected to the scaffold, and the length direction of the elastic long plate is parallel to the length direction of the scaffold; the strain gauge is fixedly bonded in the middle of the elastic long plate, the length direction of the strain gauge is parallel to the elastic long plate, and the strain gauge is electrically connected with the controller; the controller calculates the deformation of the elastic long plate according to the resistance change of the optical strain gauge, sends an alarm signal to the alarm device when exceeding a deformation early warning value, and is electrically connected with the alarm device; and the alarm device receives the alarm signal of the controller and broadcasts the alarm signal according to the alarm information. The problem of prior art adopt passive form to remind that the effect is not good, can not remind in time that scaffold frame overload may lead to disastrous consequence is solved in order to solve.
Description
Technical Field
The invention relates to the technical field of building equipment, in particular to a deformation detection system of a scaffold.
Background
The scaffold is often used for carrying constructors and construction equipment on a building site, so that the constructors can work on the scaffold, the load of the scaffold is limited, the scaffold can collapse once the safety value is exceeded, the prior art generally adopts modes such as label pasting and the like to remind the constructors of not placing the load exceeding the safety value on the scaffold, but the prompt is passive and cannot achieve a good effect, the constructors can place the load exceeding the safety value on the scaffold unintentionally or unconsciously, and disastrous consequences can be caused if the prompt cannot be timely given.
Disclosure of Invention
In order to solve the defects and shortcomings of the prior art, the invention mainly aims to provide a deformation detection system of a scaffold.
The technical scheme of the invention is as follows: the utility model provides a deformation detecting system of scaffold frame, includes the scaffold frame, still includes:
the two ends of the elastic long plate are fixedly connected to the scaffold, and the length direction of the elastic long plate is parallel to the length direction of the scaffold;
the strain gauge is fixedly bonded in the middle of the elastic long plate, the length direction of the strain gauge is parallel to the elastic long plate, and the strain gauge is electrically connected with the controller;
the controller calculates the deformation of the elastic long plate according to the resistance change of the optical strain gauge, sends an alarm signal to the alarm device when exceeding a deformation early warning value, and is electrically connected with the alarm device;
and the alarm device receives the alarm signal of the controller and broadcasts the alarm signal according to the alarm information.
Furthermore, two ends of the elastic long plate are fixedly connected with the scaffold through clamping structures;
the clamping structure includes:
the upper plate of the side-lying U-shaped part is connected with the lower surface of the elastic long plate, and the lower plate of the side-lying U-shaped part is provided with a screw hole;
the screw rod, the screw rod and screw phase-match, screw rod threaded connection is on the screw.
Further, still include:
the upper end of the main shaft is fixedly connected to the lower surface of the elastic long plate, the lower end of the main shaft is fixedly connected with a clamping plate, and the diameter of the clamping plate is larger than that of the main shaft;
the rotating hole is formed in the upper plate of the side-lying U-shaped piece and is matched with the main shaft;
the upper plate of the side lying U-shaped piece is rotatably connected to the lower surface of the elastic long plate through the matching of the rotating hole and the main shaft.
Further, still include:
the diameter of the rotary disc is more than 10 times of that of the screw rod, the center of the rotary disc is fixedly connected with the lower end of the screw rod, and the normal line of the rotary disc is parallel to the screw rod.
Further, still include:
the pressure disk, the pressure disk diameter is more than 5 times of screw rod diameter, pressure disk center and screw rod lower extreme fixed connection, and the pressure disk normal is parallel with the screw rod.
Further, a layer of rubber is fixedly connected to the upper surface of the pressing plate.
Further, the strain gauge is electrically connected with the controller through the unbalanced bridge and the AD conversion module;
the strain gauge is electrically connected with the AD conversion module through the unbalanced bridge and is used for linearly amplifying voltage change caused by resistance change of the strain gauge;
and the AD conversion module is used for converting the output voltage of the unbalanced bridge into a digital signal and sending the digital signal to the controller.
Further, still include:
the temperature compensation strain gauge is fixedly bonded on the elastic long plate, the specification of the temperature compensation strain gauge is the same as that of the strain gauge, the length direction of the temperature compensation strain gauge is perpendicular to the elastic long plate, and the temperature compensation strain gauge is connected to one arm, close to a power supply, of the unbalanced bridge and adjacent to the strain gauge.
Further, still include:
the protective shell is fixedly connected to the elastic long plate and covers the strain gauge and the temperature compensation strain gauge between the elastic long plate and the inner wall of the protective shell.
Further, the alarm device is an audible and visual alarm.
The invention has the beneficial effects that:
compared with the prior art, the method has the advantages that,
1) according to the invention, the strain gauge is adhered to the elastic long plate, and the scaffold is fixedly connected with the two ends of the elastic long plate, so that the surface of the elastic long plate is smoother than that of the scaffold, the strain gauge can be more stably adhered to the surface, and the strain gauge is better attached to the strain gauge, and the strain gauge can accurately measure the deformation of the scaffold;
2) according to the invention, the deformation of the scaffold is measured through the strain gauge, so that the scaffold is more resistant to external interference;
3) the controller is used for judging whether the measurement result of the strain gauge exceeds the standard or not, and then the alarm device is controlled by the controller to give an alarm when the measurement result exceeds the standard, so that the management of load limitation is converted from passive reminding into active reminding, managers and constructors can obtain early warning information in time and correct errors in time, and the intentionally unlawful person is deterred;
4) the invention measures the deformation of the scaffold by using the strain gauge, and has simple structure and low cost.
Drawings
FIG. 1 is a perspective view of embodiment 1 of the present invention;
FIG. 2 is a perspective view of the elastic long plate according to embodiment 1 of the present invention;
FIG. 3 is a partial schematic view of FIG. 2A;
fig. 4 is a right side view at the elastic long plate of embodiment 1 of the present invention;
FIG. 5 is a cross-sectional view of the cross-section of FIG. 4A-A;
FIG. 6 is a cross-sectional view of the cross-section of FIG. 4B-B;
FIG. 7 is a partial schematic view of FIG. 5B;
FIG. 8 is a schematic circuit diagram of the present invention.
Detailed Description
The invention will be further described with reference to the following drawings and specific embodiments:
example 1 was carried out: referring to fig. 1 to 8, a deformation detecting system for a scaffold includes a scaffold 1, and further includes: the long elastic plate 2 is fixedly connected to the scaffold 1 at two ends, and the length direction of the long elastic plate 2 is parallel to that of the scaffold 1; the strain gauge 4 is fixedly bonded in the middle of the elastic long plate 2, the length direction of the strain gauge 4 is parallel to the elastic long plate 2, and the strain gauge 4 is electrically connected with the controller 9; the controller 9 is used for calculating the deformation of the elastic long plate 2 according to the resistance change of the optical strain gauge 4, sending an alarm signal to the alarm device 10 when the deformation early warning value is exceeded, and the controller 9 is electrically connected with the alarm device 10; and the alarm device 10 receives the alarm signal of the controller 9, and broadcasts the alarm signal according to the alarm information. The controller can adopt a single chip microcomputer such as 8051, AVR and the like, and also can adopt a microprocessor such as PLC, arduino, raspberry and the like which are integrated with peripheral circuits. The elastic long plate 2 can be made of thin steel plate.
According to the invention, the strain gauge 4 is adhered to the elastic long plate 2, and the scaffold 1 is fixedly connected with the two ends of the elastic long plate 2, so that the surface of the elastic long plate 2 is smoother than that of the scaffold 1, the strain gauge 4 can be more stably adhered to the surface, and the strain gauge 4 can be better adhered to the strain gauge 4, and the strain gauge 4 can accurately measure the deformation of the scaffold 1; according to the invention, the deformation of the scaffold 1 is measured through the strain gauge 4, so that the scaffold is more resistant to external interference; the controller 9 is used for judging whether the measurement result of the strain gauge exceeds the standard or not, and then the controller 9 is used for controlling the alarm device 10 to give an alarm when the measurement result exceeds the standard, so that the management of load limitation is converted from passive reminding into active reminding, managers and constructors can obtain early warning information in time and correct errors in time, and the intentionally unlawful person is deterred; the invention measures the deformation of the scaffold 1 by using the strain gauge, and has simple structure and low cost.
Furthermore, two ends of the elastic long plate 2 are fixedly connected with the scaffold 1 through clamping structures 7; the clamping structure 7 comprises: the upper plate 7012 of the side-lying U-shaped part 701 is connected with the lower surface of the elastic long plate 2, and the lower plate 7011 of the side-lying U-shaped part 701 is provided with a screw hole; the screw rod 702, screw rod 702 and screw hole phase-match, screw rod 702 threaded connection is on the screw hole.
During the use, will insert in the opening of the U-shaped spare 701 that crouches on one's side along scaffold 1 length direction's horizontal pole, then make the upper end of screw and the upper plate 7012 of the U-shaped spare 701 that crouches on one's side press from both sides tightly along scaffold 1 length direction's montant through rotatory screw 702 to make 2 tip of elasticity rectangular slab and the horizontal pole fixed connection when scaffold 1, the horizontal pole of scaffold 1 takes place the deformation and just can make elasticity rectangular slab 2 also take place the deformation. The elastic long plate 2 and the scaffold 1 are connected through the clamping structure 7, the connection and the disassembly are very convenient, and only the screw 702 needs to be rotated.
Further, still include: the upper end of the main shaft 703 is fixedly connected to the lower surface of the elastic long plate 2, the lower end of the main shaft 703 is fixedly connected with a clamping plate 704, and the diameter of the clamping plate 704 is larger than that of the main shaft 703; a rotating hole 707, wherein the rotating hole 707 is arranged on an upper plate 7012 of the side-lying U-shaped part 701, and the rotating hole 707 is matched with the main shaft 703; the upper plate 7012 of the side lying U-shaped member 701 is rotatably connected to the lower surface of the elastic long plate 2 through the matching of the rotating hole 707 and the main shaft 703.
The side-lying U-shaped part 701 can rotate, and if the cross bars on the scaffold 1 are inconvenient to connect, the side-lying U-shaped part 701 can be rotated to connect other parts on the scaffold 1, so that the connection mode is more flexible.
Further, still include: the diameter of the spiral disk 708 is more than 10 times of that of the screw 702, the center of the spiral disk 708 is fixedly connected with the lower end of the screw 702, and the normal line of the spiral disk 708 is parallel to the screw 702.
Turning the screw 702 is made easier by the dial 708 because the torque of the dial is greater than that of the screw 702.
Further, still include: the diameter of the pressure plate 706 is more than 5 times of that of the screw 702, the center of the pressure plate 706 is fixedly connected with the lower end of the screw 702, and the normal line of the pressure plate 706 is parallel to the screw 702.
The contact area between the clamping structure 7 and the scaffold 1 is larger through the pressing disc 706, and the clamping is more stable.
Further, a layer of rubber 705 is fixedly connected to the upper surface of the pressure plate 706.
The rubber 705 enables the connecting friction force between the clamping structure 7 and the scaffold 1 to be larger, and the elasticity of the rubber 705 enables the clamping structure 7 and the scaffold 1 to be in a clamping state at the contact moment, so that the clamping is more stable.
Further, the strain gauge 4 is electrically connected with the controller 9 through an unbalanced bridge and an AD conversion module 5; the strain gauge 4 is electrically connected with the AD conversion module 5 through the unbalanced bridge and is used for linearly amplifying voltage change caused by resistance change of the strain gauge 4; and the AD conversion module 5 is used for converting the output voltage of the unbalanced bridge into a digital signal and sending the digital signal to the controller 9. The AD conversion module 5 is an analog-to-digital conversion chip with the model number of AD 7663.
The unbalanced bridge allows a slight resistance change of the strain gauge 4 to be amplified, and the circuit configuration is simple and the electronic components are inexpensive.
Further, still include: the temperature compensation strain gauge 3 is fixedly bonded on the elastic long plate 2, the specification of the temperature compensation strain gauge 3 is the same as that of the strain gauge 4, the length direction of the temperature compensation strain gauge 3 is perpendicular to the elastic long plate 2, and the temperature compensation strain gauge 3 is connected to one arm, close to a power supply, of the unbalanced bridge and adjacent to the strain gauge 4.
The length direction of the temperature compensation strain gauge 3 is perpendicular to the elastic long plate 2, so that the resistance value of the temperature compensation strain gauge 3 cannot be changed when the elastic long plate 2 deforms, but the resistance changes of the strain gauge 4 and the temperature compensation strain gauge 3 can be caused simultaneously when the temperature changes, and the resistance changes caused by the temperature changes are the same, so that the change of the output voltage cannot be caused, and the purpose of temperature compensation is achieved.
Further, still include: and the protective shell 8 is fixedly connected to the elastic long plate 2, and covers the strain gauge 4 and the temperature compensation strain gauge 3 between the elastic long plate 2 and the inner wall of the protective shell 8.
The protective shell 8 can prevent the strain gauge 4 and the temperature compensation strain gauge 3 from being touched or damaged by external force.
Further, the alarm device 10 is an audible and visual alarm.
The alarm is given by vision and hearing simultaneously, and the alarm is more effective.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (10)
1. A deformation detection system of scaffold, includes scaffold (1), its characterized in that still includes:
the long elastic plate (2) is fixedly connected to the scaffold (1) at two ends of the long elastic plate (2), and the length direction of the long elastic plate (2) is parallel to the length direction of the scaffold (1);
the strain gauge (4) is fixedly bonded in the middle of the elastic long plate (2), the length direction of the strain gauge (4) is parallel to the elastic long plate (2), and the strain gauge (4) is electrically connected with the controller (9);
the controller (9), the deformation of the elastic long plate (2) is obtained by calculation according to the resistance change of the optical strain gauge (4), an alarm signal is sent to the alarm device (10) when the deformation early warning value is exceeded, and the controller (9) is electrically connected with the alarm device (10);
and the alarm device (10) receives the alarm signal of the controller (9), and broadcasts the alarm signal according to the alarm information.
2. The deformation detection system of the scaffold according to claim 1, wherein both ends of the elastic long plate (2) are fixedly connected with the scaffold (1) through clamping structures (7);
the clamping structure (7) comprises:
the side-lying U-shaped part (701), an upper plate (7012) of the side-lying U-shaped part (701) is connected with the lower surface of the elastic long plate (2), and a lower plate (7011) of the side-lying U-shaped part (701) is provided with a screw hole;
the screw rod (702), screw rod (702) and screw match, screw rod (702) threaded connection is on the screw.
3. The deformation detecting system of a scaffold according to claim 1, further comprising:
the upper end of the main shaft (703) is fixedly connected to the lower surface of the elastic long plate (2), the lower end of the main shaft (703) is fixedly connected with a clamping plate (704), and the diameter of the clamping plate (704) is larger than that of the main shaft (703);
the rotary hole (707) is formed in an upper plate (7012) of the side-lying U-shaped piece (701), and the rotary hole (707) is matched with the main shaft (703);
an upper plate (7012) of the side lying U-shaped piece (701) is rotatably connected to the lower surface of the elastic long plate (2) through the matching of a rotating hole (707) and the main shaft (703).
4. The deformation detecting system of a scaffold according to claim 3, further comprising:
the diameter of the spiral plate (708) is more than 10 times of that of the screw (702), the center of the spiral plate (708) is fixedly connected with the lower end of the screw (702), and the normal line of the spiral plate (708) is parallel to the screw (702).
5. The deformation detecting system of a scaffold according to claim 4, further comprising:
the pressure plate (706), pressure plate (706) diameter is more than 5 times of screw rod (702) diameter, and pressure plate (706) center and screw rod (702) lower extreme fixed connection, and pressure plate (706) normal is parallel with screw rod (702).
6. The deformation detecting system of the scaffold according to claim 5, wherein a layer of rubber (705) is fixedly connected to the upper surface of the pressure plate (706).
7. The system for detecting the deformation of scaffolds according to any one of claims 1 to 6, wherein the strain gauge (4) is electrically connected with the controller (9) through an unbalanced bridge and AD conversion module (5);
the strain gauge (4) is electrically connected with the AD conversion module (5) through the unbalanced bridge and is used for linearly amplifying voltage change caused by resistance change of the strain gauge (4);
and the AD conversion module (5), the AD conversion module (5) is used for converting the output voltage of the unbalanced bridge into a digital signal and sending the digital signal to the controller (9).
8. The deformation detecting system of a scaffold according to claim 7, further comprising:
the temperature compensation strain gauge comprises a temperature compensation strain gauge (3), wherein the temperature compensation strain gauge (3) is fixedly bonded on the elastic long plate (2), the specification of the temperature compensation strain gauge (3) is the same as that of the strain gauge (4), the length direction of the temperature compensation strain gauge (3) is perpendicular to the elastic long plate (2), and the temperature compensation strain gauge (3) is connected to one arm, close to a power supply, of the unbalanced bridge and adjacent to the strain gauge (4).
9. The deformation detecting system of a scaffold according to claim 8, further comprising:
the protective shell (8), protective shell (8) fixed connection is on elasticity long slab (2) and covers foil gage (4) and temperature compensation foil gage (3) between elasticity long slab (2) and protective shell (8) inner wall.
10. The system for detecting the deformation of scaffolds according to claim 1, characterized in that the alarm device (10) is an audible and visual alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911422328.1A CN111006580A (en) | 2019-12-30 | 2019-12-30 | Deformation detecting system of scaffold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911422328.1A CN111006580A (en) | 2019-12-30 | 2019-12-30 | Deformation detecting system of scaffold |
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| Publication Number | Publication Date |
|---|---|
| CN111006580A true CN111006580A (en) | 2020-04-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911422328.1A Pending CN111006580A (en) | 2019-12-30 | 2019-12-30 | Deformation detecting system of scaffold |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111854593A (en) * | 2020-06-22 | 2020-10-30 | 同济大学 | Digital sensor based on multistage deformation surmounts early warning |
| CN113532258A (en) * | 2021-07-15 | 2021-10-22 | 上海汇焰智能科技有限公司 | Stage mother frame capable of monitoring deformation and control method for preventing deformation |
-
2019
- 2019-12-30 CN CN201911422328.1A patent/CN111006580A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111854593A (en) * | 2020-06-22 | 2020-10-30 | 同济大学 | Digital sensor based on multistage deformation surmounts early warning |
| CN113532258A (en) * | 2021-07-15 | 2021-10-22 | 上海汇焰智能科技有限公司 | Stage mother frame capable of monitoring deformation and control method for preventing deformation |
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