CN213956564U - Digital weighing sensor calibration device - Google Patents
Digital weighing sensor calibration device Download PDFInfo
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- CN213956564U CN213956564U CN202022921015.5U CN202022921015U CN213956564U CN 213956564 U CN213956564 U CN 213956564U CN 202022921015 U CN202022921015 U CN 202022921015U CN 213956564 U CN213956564 U CN 213956564U
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Abstract
The utility model discloses a digital weighing sensor calibration device, which comprises a frame, a hydraulic jack and a standard pressure gauge, wherein the hydraulic jack is used for pressurizing a sensor to be tested; the frame comprises two side edges, a top beam and a bottom beam, the top beam is vertically connected to the tops of the two side edges, the bottom beam is vertically connected to the bottoms of the two side edges, and the hydraulic jack is arranged on the top surface of the bottom beam; the top beam and the bottom beam are provided with detection slits for placing solid grease. Because the precision of the standard pressure gauge is far higher than that of the digital weighing sensor and is easy to obtain, the precision of the digital weighing sensor calibration device provided by the utility model is improved, and the calibration difficulty is reduced; whether the frame is deformed or not is judged by utilizing the detection seam, the interference of the deformation of the frame is eliminated, and the checking accuracy is further improved.
Description
Technical Field
The utility model relates to a sensor check-up electricity technical field, more specifically say, relate to a digital weighing sensor calibration equipment.
Background
Digital weighing sensor (sensor for short) is on traditional resistance strain gauge sensor basis, combines the novel electron weighing sensor of microelectronics and microcomputer, and its inside resistance element takes place deformation at the action of gravity of the object that awaits measuring, and deformation is the signal of telecommunication through the circuit conversion, and then converts the digital signal into.
The digital weighing sensor is widely applied to weighing apparatus in the field of thermal power generation, a plurality of digital load-bearing sensors are arranged in the weighing apparatus according to the rated weighing mass of the weighing apparatus, and the number of the digital weighing sensors in the weighing apparatus is generally 8-10.
Weighing error of the weighing apparatus in the thermal power generation field is about 1 per thousand, and due to long-time exposure to the open environment, poor working environment and easy corrosion, the weighing apparatus is easy to have the problem of error out-of-tolerance after long-time operation. When the error of weighing apparatus appears the overproof, need judge the sensor that the overproof appears, because the sensor is the cylinder structure, be difficult to carry out the check-up through equipment loading standard weight above the sensor.
In the conventional verification method, the same pressurizing device is used for pressurizing the detected sensor and the standard sensor at the same time, and the detected sensor and the standard sensor are compared to judge whether the detected sensor is out of tolerance or not. Due to uneven pressurization, the two sensors are prone to have vertical deviation, and the calibration result is affected; whether the pressurizing device deforms or not cannot be found, and the verification result is interfered by the deformation of the pressurizing device. In addition, the standard sensor is not easy to obtain for a thermal power plant, and is replaced by a common sensor during verification, so that the verification deviation is further increased.
In summary, how to accurately check the digital weighing sensor is a problem to be solved urgently by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a digital weighing sensor calibration equipment is to being examined the sensor pressurization through hydraulic jack to utilize standard pressure gauge to read hydraulic jack's standard pressure value, realized the accurate check-up to digital weighing sensor.
In order to achieve the above object, the present invention provides the following technical solutions:
a digital weighing sensor calibration device comprises a frame, a hydraulic jack for pressurizing a sensor to be tested and a standard pressure gauge, wherein the standard pressure gauge is connected with a hydraulic oil supplementing port of the hydraulic jack so as to obtain a standard pressure value applied by the hydraulic jack;
the frame comprises two side edges, a top beam and a bottom beam, the top beam is vertically connected to the tops of the two side edges, the bottom beam is vertically connected to the bottoms of the two side edges, and the hydraulic jack is arranged on the top surface of the bottom beam;
the top beam and the bottom beam are provided with detection slits for placing solid grease.
Preferably, the bottom surface of the top beam is provided with an upper pressure head used for being connected with the top of the detected sensor, and the axis of the upper pressure head is collinear with the axis of a hydraulic rod of the hydraulic jack.
Preferably, the hydraulic oil supplementing port is sleeved with a first threaded joint, the standard pressure gauge is sleeved with a second threaded joint, and the first threaded joint and the second threaded joint are connected through a third threaded joint and a 90-degree elbow.
Preferably, the pressure precision of the standard pressure gauge is less than or equal to 0.016 percent.
Preferably, the device further comprises a protective net arranged around the frame, the upper end face of the protective net is flush with the bottom face of the top beam, and the lower end face of the protective net is lower than the bottom face of the detected sensor and higher than the bottom face of a hydraulic rod of the hydraulic jack.
Preferably, the lower end surface of the protective net is positioned at 1/2 height of the hydraulic rod.
Preferably, the protective net is connected with the frame in a welding mode.
Preferably, the top beams comprise a first top beam and a second top beam which are arranged in parallel, and the detection seam is arranged between the first top beam and the second top beam;
the bottom beam comprises a first bottom beam and a second bottom beam which are arranged in parallel, and the detection seam is arranged between the first bottom beam and the second bottom beam.
Preferably, the width of the detection slit is 2 mm.
When the digital weighing sensor calibration device provided by the utility model is used for calibration, firstly, fixed grease is evenly smeared in the detection seam, and the hydraulic jack is placed on the top surface of the bottom beam; then, taking out the detected sensor from the weighing apparatus, placing the detected sensor between the frame top beam and the hydraulic jack, and keeping the outlet wire of the detected sensor connected with the digital instrument of the detected sensor; secondly, slowly pressurizing the detected sensor by using a hydraulic jack, recording the readings of a plurality of groups of standard pressure gauges and the readings of code values in the digital instrument of the detected sensor at corresponding moments in the pressurizing process, and simultaneously observing whether solid grease in the detection seam overflows or not, wherein if the solid grease overflows, the frame is deformed, the current data is invalid, and otherwise, the data is valid; and finally, analyzing the recorded effective data, drawing a linear curve of the standard pressure value and the internal code value, judging whether the detected sensor meets the error requirement according to the curve, and finishing the verification.
The utility model provides a digital weighing sensor calibration equipment utilizes standard pressure gauge to detect hydraulic jack's hydraulic pressure as the mark pressure value, and standard pressure gauge's precision is far higher than digital weighing sensor's precision, and compares and change in standard sensor and acquire, has improved the precision of digital weighing sensor check-up, has reduced the degree of difficulty of digital weighing sensor check-up.
Meanwhile, whether the frame deforms or not is judged by the aid of the detection seams, interference of frame deformation is eliminated, and checking accuracy is further improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic front view of a digital weighing sensor calibration apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic side view of FIG. 1;
FIG. 3 is a schematic top view of FIG. 1;
fig. 4 is a schematic structural diagram of a hydraulic oil path connecting a hydraulic jack and a standard pressure gauge.
In fig. 1-4:
01 is a detected sensor, 1 is a frame, 11 is a top beam, 12 is a bottom beam, 13 is an upper pressure head, 14 is a detection seam, 2 is a hydraulic jack, 3 is a standard pressure gauge, 4 is a protective net, 5 is a first threaded joint, 6 is a third threaded joint, 7 is a 90-degree elbow, and 8 is a second threaded joint.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The core of the utility model is to provide a digital weighing sensor calibration equipment, to being detected the sensor pressurization through hydraulic pressure jack to utilize standard pressure gauge to read hydraulic pressure jack's standard pressure value, realized the accurate check-up to digital weighing sensor.
Referring to fig. 1-4, fig. 1 is a schematic front view of a digital weighing sensor calibration apparatus according to an embodiment of the present invention; FIG. 2 is a schematic side view of FIG. 1; FIG. 3 is a schematic top view of FIG. 1; fig. 4 is a schematic structural diagram of a hydraulic oil path connecting a hydraulic jack and a standard pressure gauge.
The utility model provides a digital weighing sensor calibration device, including frame 1, be used for to being examined hydraulic jack 2 and standard pressure gauge 3 that sensor 01 pressurizes, standard pressure gauge 3 is connected with the hydraulic oil fluid port of hydraulic jack 2 to obtain the standard pressure value that hydraulic jack 2 applyed; the frame 1 comprises two side edges, a top beam 11 and a bottom beam 12, the top beam 11 is vertically connected to the tops of the two side edges, the bottom beam 12 is vertically connected to the bottoms of the two side edges, and the hydraulic jack 2 is arranged on the top surface of the bottom beam 12; the top beam 11 and the bottom beam 12 are provided with detection slits 14 for placing solid grease.
The frame 1 is used for bearing and installing calibration equipment, and the two sides, the top beam 11 and the bottom beam 12 are connected end to form a bearing frame of the digital bearing sensor calibration device.
Because the data that record when frame 1 takes place the deformation are invalid data, in order to reduce the group number of invalid data that record, preferably, frame 1 is formed by high strength channel-section steel welded connection, has extremely strong structural strength and compressive capacity, is difficult for taking place bending deformation.
The height of the frame 1 is determined according to the height of the detected sensor 01 and the height of the hydraulic jack 2, and the width of the frame 1 needs to be determined by considering the width of the hydraulic jack 2, the installation space of the standard pressure gauge 3 and other factors.
When the hydraulic jack 2 is pressurized, the top beam 11 and the bottom beam 12 of the frame 1 are both pressurized, and when the pressure value exceeds the compressive strength of the pressure value, the top beam 11 and the bottom beam 12 deform and interfere with the inner code value measured by the detected sensor 01, so that detection seams 14 for detecting whether deformation occurs are arranged on the top beam 11 and the bottom beam 12.
The detection slit 14 may be a narrow groove on the top beam 11 or the bottom beam 12, or may be a slit between beams, as long as the effect of amplifying the deformation of the top beam 11 or the bottom beam 12 is achieved.
Preferably, referring to fig. 1, the top beam 11 includes a first top beam and a second top beam arranged in parallel, and a detection slit 14 is arranged between the first top beam and the second top beam; the bottom beam 12 comprises a first bottom beam and a second bottom beam which are arranged in parallel, and a detection seam 14 is arranged between the first bottom beam and the second bottom beam.
Because the detection seam 14 is formed in the assembly process of the frame 1, the subsequent processing of the detection seam 14 on the top beam 11 and the bottom beam 12 is avoided, and the production and manufacturing processes of the digital weighing sensor calibration device are simplified; meanwhile, the arrangement of the double top beams and the double bottom beams further enhances the compressive strength of the top beams 11 and the bottom beams 12.
Preferably, the width of the detection slit 14 is set to 2mm ± 1 mm. The width of the detection slit 14 is not a fixed value, and can be adjusted according to actual production needs.
The hydraulic rod of the hydraulic jack 2 is connected to the bottom of the sensor 01 to be tested during the calibration to pressurize the sensor 01 to be tested. The kind, specification, etc. of the hydraulic jack 2 are determined according to actual needs by referring to the prior art, and are not described herein again.
And the standard pressure gauge 3 is connected with the hydraulic oil replenishing port of the hydraulic jack 2 and is used for acquiring a standard pressure value applied by the hydraulic jack 2.
In order to ensure the checking precision, the precision grade of the standard pressure gauge 3 is far higher than that of the digital weighing sensor.
During the calibration, firstly, uniformly smearing fixed grease in the detection seam 14, and placing the hydraulic jack 2 on the top surface of the bottom beam 12; then, taking out the detected sensor 01 from the weighing apparatus, placing the detected sensor 01 between the top beam 11 of the frame 1 and the hydraulic jack 2, and keeping the outlet wire of the detected sensor 01 connected with a digital instrument of the detected sensor 01; secondly, slowly pressurizing the sensor 01 to be detected by using a hydraulic jack 2, recording the readings of a plurality of groups of standard pressure gauges 3 and the readings of code values in a digital instrument at corresponding moments in the pressurizing process, and simultaneously observing whether solid grease in a detection slit 14 overflows or not, wherein if the solid grease overflows, the deformation of the frame 1 is shown, the current data is invalid, otherwise, the data is valid; and finally, analyzing the recorded effective data, drawing a linear curve of the standard pressure value and the internal code value, judging whether the detected sensor 01 meets the error requirement according to the curve, and finishing the verification.
In general, the error of the digital weighing sensor is required to be less than or equal to +/-0.02% FS in nonlinearity, less than or equal to +/-0.02% FS in hysteresis and less than or equal to +/-0.03% FS in sensitivity.
The error requirement of the digital weighing error sensor determines the pressure precision grade range of the standard pressure gauge 3, the higher the error requirement of the digital weighing sensor is, and the higher the precision grade requirement of the standard pressure gauge 3 is to ensure the checking precision.
Preferably, the pressure precision of the standard pressure gauge 3 is less than or equal to 0.016 percent, and the precision grade is far higher than that of a digital weighing sensor, so that the standard pressure gauge can be used as a standard pressure detection standard.
In this embodiment, utilize standard pressure gauge 3 to detect hydraulic jack 2's hydraulic pressure as the mark pressure value, standard pressure gauge 3's precision is far higher than digital weighing sensor's precision, and compares and more easily acquires in standard sensor, has improved the precision of digital weighing sensor check-up, has reduced the degree of difficulty of digital weighing sensor check-up.
Meanwhile, whether the frame 1 deforms or not is judged by utilizing the detection seam 14, so that the interference of the deformation of the frame 1 is eliminated, and the verification accuracy is further improved.
Preferably, in order to uniformly stress the top of the detected sensor 01, the bottom surface of the top beam 11 may be provided with an upper pressure head 13 for connecting with the top of the detected sensor 01, and the axis of the upper pressure head 13 is collinear with the axis of the hydraulic rod of the hydraulic jack 2. The upper pressure head 13 is inserted into the top of the detected sensor 01 to fix the position of the detected sensor 01 and prevent the detected sensor 01 from being arranged obliquely.
On the basis of the above embodiment, referring to fig. 4, the hydraulic oil supply port is sleeved with the first threaded joint 5, the standard pressure gauge 3 is sleeved with the second threaded joint 8, and the first threaded joint 5 and the second threaded joint 8 are connected through the third threaded joint 6 and the 90-degree elbow 7.
The size of the first threaded joint 5 is determined according to the size of a hydraulic oil replenishing port of the hydraulic jack 2, the size of the second threaded joint 8 is determined according to the size of a pressure gauge joint of a standard pressure gauge 3, and the size of the third threaded joint 6 and the size of the 90-degree elbow 7 are determined according to the first threaded joint 5 and the second threaded joint 8.
On the basis of the embodiment, the device further comprises a protective net 4 arranged around the frame 1, the upper end surface of the protective net 4 is flush with the bottom surface of the top beam 11, and the lower end surface of the protective net 4 is lower than the bottom surface of the detected sensor 01 and higher than the bottom surface of a hydraulic rod of the hydraulic jack 2, so that the human body injury caused by slippage and popping of the joint of the detected sensor 01 and the hydraulic jack 2 in the pressurizing process is avoided.
In order to achieve a good protection effect, the protection net 4 should have a certain structural strength. Preferably, the protective net 4 is arranged as a steel wire net, the strength of the steel wire net is high, the detected sensor 01 can be effectively prevented from popping up when the detected sensor 01 slips, and the protective effect is good.
The aperture of the steel wire mesh, the diameter of the steel wire, etc. should be determined according to the actual production needs by referring to the prior art, and are not described herein again.
The protective net 4 can be detachably connected to the top beam 11 through bolt connection and the like, preferably, the protective net 4 is connected with the frame 1 in a welding mode, the connection strength is high, and the protective net 4 is not prone to falling off.
Note that, in order to facilitate placement and removal of the sensor 01 to be tested, the lower end surface of the protection net 4 should not be too close to the bottom surface of the hydraulic rod of the hydraulic jack 2.
Preferably, the lower end face of the protection net 4 is located at 1/2 height of the hydraulic rod, so as to meet the requirements of safety protection and convenient installation.
It should be noted that the first threaded joint 5, the second threaded joint 8 and the third threaded joint 6, and the first, second and third of the first top beam and the second top beam and the first bottom beam and the second bottom beam are mentioned in this document only for distinguishing the difference of the positions, and do not limit the sequence.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
It is right above the utility model provides a digital weighing sensor calibration equipment has carried out detailed introduction. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (9)
1. The digital weighing sensor calibration device is characterized by comprising a frame (1), a hydraulic jack (2) for pressurizing a sensor (01) to be tested and a standard pressure gauge (3), wherein the standard pressure gauge (3) is connected with a hydraulic oil supplementing port of the hydraulic jack (2) to obtain a standard pressure value applied by the hydraulic jack (2);
the frame (1) comprises two side edges, a top beam (11) and a bottom beam (12), the top beam (11) is vertically connected to the tops of the two side edges, the bottom beam (12) is vertically connected to the bottoms of the two side edges, and the hydraulic jack (2) is arranged on the top surface of the bottom beam (12);
the top beam (11) and the bottom beam (12) are provided with detection seams (14) for placing solid grease.
2. The digital weighing sensor calibration device according to claim 1, characterized in that the bottom surface of the top beam (11) is provided with an upper pressure head (13) for connecting with the top of the sensor (01) to be tested, and the axis of the upper pressure head (13) is collinear with the axis of the hydraulic rod of the hydraulic jack (2).
3. The digital weighing sensor calibration device according to claim 1, wherein the hydraulic oil supply port is sleeved with a first threaded joint (5), the standard pressure gauge (3) is sleeved with a second threaded joint (8), and the first threaded joint (5) and the second threaded joint (8) are connected through a third threaded joint (6) and a 90-degree elbow (7).
4. The digital weighing sensor calibration device according to claim 1, wherein the pressure accuracy of the standard pressure gauge (3) is less than or equal to 0.016%.
5. The digital weighing sensor calibration device according to any one of claims 1-4, further comprising a protective net (4) arranged around the periphery of the frame (1), wherein the upper end surface of the protective net (4) is flush with the bottom surface of the top beam (11), and the lower end surface of the protective net (4) is lower than the bottom surface of the sensor (01) to be tested and higher than the bottom surface of the hydraulic rod of the hydraulic jack (2).
6. The digital load cell verification device according to claim 5, wherein the lower end face of the protection net (4) is located at 1/2 height of the hydraulic lever.
7. The digital load cell verification device according to claim 6, wherein the protective mesh (4) is welded to the frame (1).
8. The digital load cell calibrator according to claim 7, wherein the top bar (11) comprises a first top bar and a second top bar arranged in parallel, and the detection slot (14) is disposed between the first top bar and the second top bar;
the bottom beam (12) comprises a first bottom beam and a second bottom beam which are arranged in parallel, and the detection seam (14) is arranged between the first bottom beam and the second bottom beam.
9. The digital load cell verification device of claim 8, wherein the width of the detection slit (14) is 2 mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022921015.5U CN213956564U (en) | 2020-12-08 | 2020-12-08 | Digital weighing sensor calibration device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022921015.5U CN213956564U (en) | 2020-12-08 | 2020-12-08 | Digital weighing sensor calibration device |
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| CN213956564U true CN213956564U (en) | 2021-08-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117968934A (en) * | 2024-03-11 | 2024-05-03 | 北京精微致合测试技术有限公司 | Intelligent compensation system for pressure sensor detection |
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2020
- 2020-12-08 CN CN202022921015.5U patent/CN213956564U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117968934A (en) * | 2024-03-11 | 2024-05-03 | 北京精微致合测试技术有限公司 | Intelligent compensation system for pressure sensor detection |
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