CN214793555U - Resistance strain type pressure sensing and pressure-bearing eccentric detection combiner - Google Patents
Resistance strain type pressure sensing and pressure-bearing eccentric detection combiner Download PDFInfo
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- CN214793555U CN214793555U CN202121425901.7U CN202121425901U CN214793555U CN 214793555 U CN214793555 U CN 214793555U CN 202121425901 U CN202121425901 U CN 202121425901U CN 214793555 U CN214793555 U CN 214793555U
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Abstract
The utility model provides a resistance strain type pressure sensing and pressure-bearing eccentricity detection combiner, which belongs to the field of pressure and pressure-bearing eccentricity detection and comprises a top cover, a pressure sensor, a transition rigid body, a pressure-bearing eccentricity detector, a base and a corresponding resistance strain gauge system, wherein the resistance strain type pressure sensing and pressure-bearing eccentricity detection combiner consists of two parts, namely the pressure sensor and the pressure-bearing eccentricity detector, the pressure sensor is positioned between the top cover and the transition rigid body, and the pressure-bearing eccentricity detector is positioned between the transition rigid body and the base; a group of resistance strain gauges are pasted on the front surface and the back surface of the pressure sensor, and a group of resistance strain gauges are pasted on the side vertical surfaces of the pressure-bearing eccentric detector in the east-west, south-north directions. The utility model discloses be worth can also detect universal tester's the eccentric function of loading simultaneously gathering pressure. The utility model discloses have characteristics such as high sensitivity, high measurement accuracy, high reliability and interference killing feature are strong, have the combined function of axial pressure survey and the eccentric monitoring of loading.
Description
Technical Field
The utility model belongs to pressure and eccentric detection area of pressure-bearing especially relate to a resistance strain type pressure sensing and eccentric detection combiner of pressure-bearing.
Background
The utility model is mainly manufactured according to the electrical measurement principle; the electric measurement principle is that a strain signal acquired by a strain gauge is input into the strain gauge and a strain value reading is output by the strain gauge, the strain signals generated by the stress deformation of a pressure sensor and a pressure-bearing eccentric detector of the detection device are required to be converted into electric signals to be measured by an electric measurement method, and the conversion element is a resistance strain gauge.
The traditional pressure sensor can only simply measure the pressure value, and lacks scientific judgment basis for the accuracy of the pressure value influenced by the eccentric loading condition. The utility model discloses a synthesize pressure sensor and eccentric monitoring devices of loading and use. The eccentric loading condition during the experiment can be monitored in real time while the pressure value is measured, and the eccentric loading condition can be used as an important basis for judging the accuracy of the pressure experiment value.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that above-mentioned technique exists, the utility model provides a universal tester is when doing the axial pressure experiment, mainly is the combination detector who carries out pressure value and the eccentric condition of loading in order to develop the pressure value that an accurate measurement produced, installs this combiner during the measurement between universal tester's top board and the upper surface by the test piece between the detection of carrying out the eccentric condition of pressure value and loading.
The utility model adopts the technical proposal that:
the resistance strain type pressure sensing and pressure-bearing eccentricity detection combiner comprises a top cover, a pressure sensor, a transition rigid body, a pressure-bearing eccentricity detector, a base and a corresponding resistance strain gauge system;
the resistance strain type pressure sensing and pressure-bearing eccentric detection combiner is composed of a pressure sensor
The pressure sensor is positioned between the top cover and the transition rigid body, and the pressure-bearing eccentric detector is positioned between the transition rigid body and the base; a group of resistance strain gauges are pasted on the front surface and the back surface of the pressure sensor, and a group of resistance strain gauges are pasted on the side vertical surfaces of the pressure-bearing eccentric detector in the east-west, south-north directions.
Furthermore, the top cover, the pressure sensor, the transition rigid body, the pressure-bearing eccentric detector and the base are all made of low-carbon steel and are integrally processed and molded by adopting a linear cutting processing technology, and the central axes of the top cover, the pressure sensor, the transition rigid body, the pressure-bearing eccentric detector and the base are completely overlapped; the pressure sensor is a long cylinder, and the size of the cross section of the pressure sensor is smaller than that of the cross sections of the top cover and the transition rigid body; the pressure-bearing eccentric detector is a cuboid, the cross section of the pressure-bearing eccentric detector is square, and the section size of the pressure-bearing eccentric detector is smaller than that of the transition rigid body and the base.
Furthermore, four resistance strain gauges are adhered to the outer surface of the pressure sensor, and a front longitudinal resistance strain gauge of the pressure sensor is adhered to the center of the outer surface of the front of the pressure sensor along the direction of the central axis and used for measuring the front longitudinal strain of the pressure sensor; a front transverse resistance strain gage of the sensor is stuck along the direction vertical to the central axis at the central position of the outer surface of the front for measuring the transverse strain of the front of the pressure sensor; two outgoing lines of the longitudinal resistance strain gauge on the front surface of the sensor are respectively connected with one ends of a first shielding lead and a second shielding lead in a welding manner, and the other ends of the first shielding lead and the second shielding lead are connected with a bridge circuit corresponding to the strain gauge; two outgoing lines of the transverse resistance strain gauge on the front surface of the sensor are respectively connected with one ends of a third shielding wire and a fourth shielding wire in a welding manner, and the other ends of the third shielding wire and the fourth shielding wire are connected with a bridge circuit corresponding to the strain gauge; a back longitudinal resistance strain gauge of the sensor is stuck at the center of the outer surface of the back of the pressure sensor along the central axis direction and is used for measuring the back longitudinal strain of the pressure sensor; a transverse resistance strain gauge on the back of the sensor is stuck along the direction vertical to the central axis at the central position of the outer surface of the back and is used for measuring the transverse strain on the back of the pressure sensor; two outgoing lines of the longitudinal resistance strain gauge on the reverse side of the sensor are respectively connected with one ends of a fifth shielding lead and a sixth shielding lead in a welding mode, and the other ends of the fifth shielding lead and the sixth shielding lead are connected with a bridge circuit corresponding to the strain gauge. Two outgoing lines of the transverse resistance strain gauge on the reverse side of the sensor are respectively connected with one ends of a seventh shielding lead and an eighth shielding lead in a welding mode, and the other ends of the seventh shielding lead and the eighth shielding lead are connected with a bridge circuit corresponding to the strain gauge; the resistance value of the front longitudinal resistance strain gauge of the sensor is R1, the resistance value of the front transverse resistance strain gauge of the sensor is R2, the resistance value of the back longitudinal resistance strain gauge of the sensor is R3, and the resistance value of the back transverse resistance strain gauge of the sensor is R4; the four resistance strain gauges are connected in a full-bridge mode through shielding wires and connected into a first channel of the strain gauge to form a Wheatstone bridge.
Furthermore, two resistance strain gauges are adhered to the east outer surface of the pressure-bearing eccentric detector, and a detector east longitudinal resistance strain gauge is adhered to the center of the east outer surface of the pressure-bearing eccentric detector along the central axis direction and used for measuring the longitudinal strain of the east outer surface of the pressure-bearing eccentric detector; an east lateral resistance strain gauge of the detector is stuck along the center position of the east lateral outer surface and is vertical to the central axis direction, and the east lateral resistance strain gauge is used for measuring the lateral strain of the east lateral outer surface of the pressure-bearing eccentric detector; two outgoing lines of the longitudinal resistance strain gauge on the east side of the detector are respectively connected with one ends of a ninth shielding lead and a tenth shielding lead in a welding mode, and the other ends of the ninth shielding lead and the tenth shielding lead are connected with a bridge circuit corresponding to the strain gauge. Two outgoing lines of the east transverse resistance strain gauge of the detector are respectively connected with one ends of an eleventh shielding lead and a twelfth shielding lead in a welding manner, and the other ends of the eleventh shielding lead and the twelfth shielding lead are connected with a bridge circuit corresponding to the strain gauge; the resistance value of the longitudinal resistance strain gauge at the east side of the detector is R1, the resistance value of the transverse resistance strain gauge at the east side of the detector is R2, the two resistance strain gauges are in half-bridge connection through a shielding lead and are connected into a second channel of the strain gauge to form a Wheatstone bridge; two resistance strain gauges are adhered to the south outer surface of the pressure-bearing eccentric detector, and a south longitudinal resistance strain gauge of the pressure-bearing eccentric detector is adhered to the center of the south outer surface of the pressure-bearing eccentric detector along the central axis direction and is used for measuring the longitudinal strain of the south outer surface of the pressure-bearing eccentric detector; and a south lateral resistance strain gauge of the detector is stuck along the central position of the south lateral outer surface and is vertical to the central axis direction, and is used for measuring the lateral strain of the south lateral outer surface of the pressure-bearing eccentric detector. Two outgoing lines of the south-side longitudinal resistance strain gauge of the detector are respectively connected with one ends of a thirteenth shielding lead and a fourteenth shielding lead in a welding mode, and the other ends of the thirteenth shielding lead and the fourteenth shielding lead are connected with a bridge circuit corresponding to the strain gauge; two outgoing lines of the south-side transverse resistance strain gauge of the detector are respectively connected with one ends of a fifteenth shielding lead and a sixteenth shielding lead in a welding mode, and the other ends of the fifteenth shielding lead and the sixteenth shielding lead are connected with a bridge circuit corresponding to the strain gauge; the resistance value of the south longitudinal resistance strain gauge of the detector is R1, the resistance value of the south transverse resistance strain gauge of the detector is R2, the two resistance strain gauges are in half-bridge connection through a shielding lead and are connected to a third channel of the strain gauge to form a Wheatstone bridge; two resistance strain gauges are adhered to the west outer surface of the pressure-bearing eccentric detector, and a west longitudinal resistance strain gauge of the detector is adhered to the center of the west outer surface of the pressure-bearing eccentric detector along the central axis direction and is used for measuring the longitudinal strain of the west outer surface of the pressure-bearing eccentric detector; and a west lateral resistance strain gauge of the detector is stuck along the direction of the central axis perpendicular to the center position of the west outer surface and is used for measuring the lateral strain of the west outer surface of the pressure-bearing eccentric detector. Two outgoing lines of the west-side longitudinal resistance strain gauge of the detector are respectively connected with one ends of a seventeenth shielding lead and an eighteenth shielding lead in a welding mode, and the other ends of the seventeenth shielding lead and the eighteenth shielding lead are connected with a bridge circuit corresponding to the strain gauge. Two outgoing lines of the west-side transverse resistance strain gauge of the detector are respectively connected with one ends of a nineteenth shielding lead and a twentieth shielding lead in a welding mode, and the other ends of the nineteenth shielding lead and the twentieth shielding lead are connected with a bridge circuit corresponding to the strain gauge. The resistance value of the west-side longitudinal resistance strain gauge of the detector is R1, the resistance value of the west-side transverse resistance strain gauge of the detector is R2, the two resistance strain gauges are in half-bridge connection through a shielding lead and are connected into a fourth channel of the strain gauge to form a Wheatstone bridge; two resistance strain gauges are adhered to the outer surface of the north side of the pressure-bearing eccentric detector, and a longitudinal resistance strain gauge of the north side of the detector is adhered to the center of the outer surface of the north side of the pressure-bearing eccentric detector along the direction of the central axis and is used for measuring the longitudinal strain of the outer surface of the north side of the pressure-bearing eccentric detector; and a north lateral resistance strain gauge of the detector is stuck along the central position of the north outer surface and is vertical to the central axis direction, and is used for measuring the lateral strain of the north outer surface of the pressure-bearing eccentric detector. Two outgoing lines of the north-side longitudinal resistance strain gauge of the detector are respectively connected with one ends of a twenty-first shielding lead and a twenty-second shielding lead in a welding mode, and the other ends of the twenty-first shielding lead and the twenty-second shielding lead are connected with a bridge circuit corresponding to the strain gauge. Two outgoing lines of the north side transverse resistance strain gauge of the detector are respectively connected with one ends of a twenty-third shielding lead and a twenty-fourth shielding lead in a welding mode, and the other ends of the twenty-third shielding lead and the twenty-fourth shielding lead are connected with a bridge circuit corresponding to the strain gauge. The resistance value of the north side longitudinal resistance strain gauge of the detector is R1, the resistance value of the north side transverse resistance strain gauge of the detector is R2, the two resistance strain gauges are in half-bridge connection through a shielding lead, and a fifth channel connected to the strain gauge forms a Wheatstone bridge.
Furthermore, a first shielding wire and an eighth shielding wire are connected to the A binding post of the first channel bridge of the strain gauge, a second shielding wire and a third shielding wire are connected to the B binding post of the first channel bridge of the strain gauge, a fourth shielding wire and a fifth shielding wire are connected to the C binding post of the first channel bridge of the strain gauge, and a sixth shielding wire and a seventh shielding wire are connected to the D binding post of the first channel bridge of the strain gauge.
Further, a ninth shield wire is connected to the a post of the second path bridge of the strain gauge, a tenth shield wire and an eleventh shield wire are connected to the B post of the second path bridge of the strain gauge, and a twelfth shield wire is connected to the C post of the second path bridge of the strain gauge.
Furthermore, when the strain gauge is used in a matched manner, the thirteenth shielding lead is connected to the binding post A of the third channel bridge circuit of the strain gauge, the fourteenth shielding lead and the fifteenth shielding lead are connected to the binding post B of the third channel bridge circuit of the strain gauge, and the sixteenth shielding lead is connected to the binding post C of the third channel bridge circuit of the strain gauge.
Furthermore, when the strain gauge is used in a matched manner, the seventeenth shielding lead is connected to the A binding post of the fourth channel bridge of the strain gauge, the eighteenth shielding lead and the nineteenth shielding lead are connected to the B binding post of the fourth channel bridge of the strain gauge, and the twentieth shielding lead is connected to the C binding post of the fourth channel bridge of the strain gauge.
Furthermore, when the strain gauge is used in a matched manner, the twenty-first shielding lead is connected to the A binding post of the fifth channel bridge circuit of the strain gauge, the twenty-second shielding lead and the twenty-third shielding lead are connected to the B binding post of the fifth channel bridge circuit of the strain gauge, and the twenty-fourth shielding lead is connected to the C binding post of the fifth channel bridge circuit of the strain gauge.
Furthermore, the resistance strain gauges adhered to the surfaces of the elastic elements of the resistance strain type pressure sensor and the pressure-bearing eccentric detection combiner are of the same type and have the same resistance value.
The utility model discloses the advantage and the beneficial effect who have:
the utility model has the advantages that the deformation condition of the pressure-bearing eccentric detector when the pressure-bearing eccentric detector is under the axial pressure is monitored through the strain value displayed by the two-to-five channels of the resistance strain gauge during the experiment, and the purpose of detecting whether the universal testing machine generates the eccentric loading when the axial pressure experiment is carried out is achieved; measuring a pressure value of an axial pressure experiment through a strain value displayed by the calibrated pressure sensor in a first channel of the strain gauge; the combiner has the advantages of simple manufacture, stable data, quick response and realization of simultaneous measurement of the pressure value and the loading eccentricity condition, monitors the loading eccentricity condition while measuring the pressure value, and can judge the accuracy of the experiment more scientifically; and a more accurate experimental pressure value is obtained by adjusting the loading eccentricity condition.
Drawings
The present invention will be described in detail with reference to the accompanying drawings:
FIG. 1 is a schematic diagram of a Wheatstone bridge;
fig. 2 is a schematic view of the resistance strain type pressure sensing and pressure-bearing eccentricity detection combiner of the present invention;
fig. 3 is a schematic diagram of the front surface mount of the pressure sensor and the wiring of the present invention;
fig. 4 is a schematic diagram of the reverse surface mounting and wiring of the pressure sensor of the present invention;
FIG. 5 is a schematic diagram of the pressure-bearing eccentric detector of the present invention showing the surface mount device and the wiring;
FIG. 6 is a schematic diagram of the south-side outer surface patch and wiring of the pressure-bearing eccentric detector of the present invention;
FIG. 7 is a schematic diagram of the west outer surface patch and wiring of the pressure-bearing eccentric detector of the present invention;
FIG. 8 is a schematic diagram of the north external surface patch and wiring of the pressure-bearing eccentric detector of the present invention;
in the figure: 1, top cover; 2 a pressure sensor; 3, transition rigid body; 4 a pressure-bearing eccentricity detector; 5, a base; 6, a longitudinal resistance strain gauge on the front surface of the sensor; 7, a transverse resistance strain gauge on the front surface of the sensor; 8, a longitudinal resistance strain gauge on the back surface of the sensor; 9 transverse resistance strain gauges on the back of the sensor; 10 detector east longitudinal resistance strain gauge; 11 detector east lateral resistance strain gauge; 12 detector south longitudinal resistance strain gauge; 13 detector south lateral resistance strain gauge; 14 detector west longitudinal resistance strain gage; 15 detector west lateral resistance strain gauge; 16 detector north longitudinal resistance strain gauge; 17 detector north side transverse resistance strain gauge; 18 a first shielding wire; 19 a second shielded conductor; 20 a third shielded conductor; 21 a fourth shielded wire; 22 a fifth shielded conductor; 23 a sixth shielded wire; 24 a seventh shielded conductor; 25 an eighth shielded wire; 26 a ninth shielded conductor; 27 tenth shielded conductor; 28 an eleventh shielded conductor; 29 a twelfth shielded wire; 30 a thirteenth shielded wire; 31 a fourteenth shielded wire; 32 a fifteenth shielded conductor; 33 sixteenth shielded conductor; 34 seventeenth shielded wire; 35 an eighteenth shielded conductor; 36 a nineteenth shielded conductor; 37 twentieth shielded conductor; 38 a twenty-first shielded conductor; 39 a twenty-second shielded conductor; 40 a twenty-third shielded conductor; 41 twenty-fourth shielded conductor.
Detailed Description
For further explanation of the present invention, the following detailed description of the present invention is provided with reference to the drawings and examples, which should not be construed as limiting the scope of the present invention.
As shown in fig. 1 to 8, in the resistance strain type pressure sensing and pressure-bearing eccentricity detection combiner, before the combiner is used, the pressure value of the assembled pressure sensor 2 is calibrated, and the corresponding relationship between the output strain value and the pressure value is grasped.
After the top cover 1, the pressure sensor 2, the transition rigid body 3, the pressure-bearing eccentric detector 4 and the base 5 are manufactured, strain gages are pasted on the pressure sensor 2 and the pressure-bearing eccentric detector 4 and connected with shielding wires, and the manufacture of a strain gage system is completed. Before the test, the pressure value of the pressure sensor 2 is calibrated.
During the experiment, as shown in fig. 2, a resistance strain type pressure sensor and a pressure-bearing eccentric detection combiner are placed between an upper pressure plate of a universal testing machine and the upper surface of a pressure-bearing test piece, a top cover 1 is contacted with the upper pressure plate of the testing machine, a base 5 is contacted with the upper surface of the pressure-bearing test piece, and the center positions of the top cover 1 and the upper pressure plate of the testing machine, the upper surface of the base 5 and the pressure-bearing test piece and the center position of a lower pressure plate of the pressure testing machine are ensured to be superposed; the positions of the four side vertical surfaces of the pressure-bearing eccentric detector 4 correspond to four directions of the south, the south and the north; and setting a loading scheme of the universal testing machine according to the material and the size of the combiner, and ensuring that the stress condition of each component of the combiner is in an elastic deformation range.
As shown in fig. 3 and 4, the first shielding wire 18 and the eighth shielding wire 25 are connected to the a post of the first-channel bridge of the strain gauge, the second shielding wire 19 and the third shielding wire 20 are connected to the B post of the first-channel bridge of the strain gauge, the fourth shielding wire 21 and the fifth shielding wire 22 are connected to the C post of the first-channel bridge of the strain gauge, and the sixth shielding wire 23 and the seventh shielding wire 24 are connected to the D post of the first-channel bridge of the strain gauge, so that a wheatstone bridge as shown in fig. 1 is formed; the pressure strain value is measured by using the first channel in a measurement mode of selecting a full bridge on the strain gauge.
As shown in fig. 5, a ninth shielded wire 26 is connected to the a post of the second strain gauge channel bridge, a tenth shielded wire 27 and an eleventh shielded wire 28 are connected to the B post of the second strain gauge channel bridge, and a twelfth shielded wire 29 is connected to the C post of the second strain gauge channel bridge. During the experiment, a half-bridge measuring mode is selected for the strain gauge, and a second channel of the strain gauge is used for detecting a strain value generated when the outer surface of the east side of the pressure-bearing eccentric detector 4 is deformed under pressure.
As shown in fig. 6, a thirteenth shield wire 30 is connected to the a post of the strain gauge third via bridge, a fourteenth shield wire 31, a fifteenth shield wire 32 are connected to the B post of the strain gauge third via bridge, and a sixteenth shield wire 33 is connected to the C post of the strain gauge third via bridge. During the experiment, a half-bridge measurement mode is selected for the strain gauge, and a third channel of the strain gauge is used for detecting a strain value generated when the outer surface of the south side of the pressure-bearing eccentric detector 4 is deformed under pressure.
As shown in fig. 7, a seventeenth shielded wire 34 is connected to the a post of the fourth bridge of the strain gauge, an eighteenth shielded wire 35 and a nineteenth shielded wire 36 are connected to the B post of the fourth bridge of the strain gauge, and a twentieth shielded wire 37 is connected to the C post of the fourth bridge of the strain gauge. During the experiment, a half-bridge measuring mode is selected for the strain gauge, and a fourth channel of the strain gauge is used for detecting a strain value generated when the outer surface of the west side of the pressure-bearing eccentric detector 4 is deformed under pressure.
As shown in fig. 8, a twenty-first shielded wire 38 is connected to the a post of the strain gauge fifth channel bridge, a twenty-second shielded wire 39, a twenty-third shielded wire 40 are connected to the B post of the strain gauge fifth channel bridge, and a twenty-fourth shielded wire 41 is connected to the C post of the strain gauge fifth channel bridge. During the experiment, a half-bridge measuring mode is selected for the strain gauge, and a fifth channel of the strain gauge is used for detecting a strain value generated when the outer surface of the north side of the pressure-bearing eccentric detector 4 is deformed under pressure.
After the preparation work is finished, the universal testing machine starts to carry out axial pressure loading on the resistance strain type pressure sensing and bearing eccentric detection combiner and the tested piece according to a set loading scheme, and one to five channels of the strain gauge are utilized to simultaneously start to acquire strain data. The axial pressure loading eccentricity condition of the universal testing machine can be monitored in real time by comparing the strain values of the two to five channels; if the strain values of the two to five channels are basically equal, no load eccentricity exists; if the difference of the strain values of the two to five channels is large, the loading eccentricity is generated, and the assembly and field installation precision of the testing machine is adjusted by adjusting the anchor, reassembling the pressing plate of the testing machine and the like, so that the aim of detecting and eliminating the loading eccentricity is fulfilled; the strain value corresponding to the pressure value output by the testing machine in real time is acquired through the calibrated first channel of the strain gauge, and the strain value is converted into a real-time pressure value through calibration data by using a corresponding conversion system, so that the real-time pressure value of the tested piece is accurately measured. The function of simultaneously measuring the pressure value and the loading eccentricity condition in the experiment by using the resistance strain type pressure sensing and pressure-bearing eccentricity detection combiner is realized.
The working principle of the utility model is as follows:
the pressure sensor is positioned at the upper half part of the combiner, resistance strain gauges are pasted at the centrosymmetric positions of the front surface and the back surface of the low-carbon steel element, the resistance strain gauges are connected into a first channel of the strain gauge in a full-bridge connection mode to form a Wheatstone bridge and are used for measuring the strain change output by the pressure sensor when the pressure sensor deforms due to the fact that the axial pressure is loaded by the testing machine, and the purpose of measuring the experimental pressure is achieved by comparing the linear relation between the pressure value calibrated in advance and the strain value; the pressure-bearing eccentric detector is positioned at the lower half part of the combiner, four groups of strain gauges of the pressure-bearing eccentric detector are adhered to the center positions of four side vertical surfaces of the pressure-bearing eccentric detector, the four groups of resistance strain gauges are connected into two to five channels of the resistance strain gauge in a half bridge line mode to form four Wheatstone bridges, measurement of change of strain values of the four side vertical surfaces is achieved, change of the strain values of the four side vertical surfaces corresponds to deformation conditions of the four side vertical surfaces, and measurement of loading eccentric conditions when the testing machine is subjected to an axial pressure experiment is achieved by monitoring the strain values of the two to five channels of the strain gauge.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the scope of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. Resistance strain type pressure sensing and eccentric detection combiner of pressure-bearing, its characterized in that: the device comprises a top cover (1), a pressure sensor (2), a transition rigid body (3), a pressure-bearing eccentric detector (4), a base (5) and a corresponding resistance strain gauge system;
the resistance strain type pressure sensing and pressure-bearing eccentricity detection combiner consists of a pressure sensor (2) and a pressure-bearing eccentricity detector (4), wherein the pressure sensor (2) is positioned between the top cover (1) and the transition rigid body (3), and the pressure-bearing eccentricity detector (4) is positioned between the transition rigid body (3) and the base (5); a group of resistance strain gauges are pasted on the front surface and the back surface of the pressure sensor (2), and a group of resistance strain gauges are pasted on the side vertical surfaces of the pressure-bearing eccentric detector (4) in the east-west, south-north directions.
2. The combination of a resistive strain gauge pressure sensing and pressure bearing eccentricity detection as claimed in claim 1, wherein: the top cover (1), the pressure sensor (2), the transition rigid body (3), the pressure-bearing eccentric detector (4) and the base (5) are all made of low-carbon steel and are integrally processed and molded by adopting a linear cutting processing technology, the central axes of the top cover (1), the pressure sensor (2), the transition rigid body (3), the pressure-bearing eccentric detector (4) and the base (5) are completely superposed, wherein the top cover (1), the transition rigid body (3) and the base (5) are short cylinders and have the same size; the pressure sensor (2) is a long cylinder, and the size of the cross section of the pressure sensor is smaller than that of the cross sections of the top cover (1) and the transition rigid body (3); the pressure-bearing eccentric detector (4) is a cuboid, the cross section of the pressure-bearing eccentric detector is square, and the section size of the pressure-bearing eccentric detector is smaller than that of the transition rigid body (3) and the base (5).
3. The combination of a resistive strain gauge pressure sensing and pressure bearing eccentricity detection as claimed in claim 1, wherein: four resistance strain gauges are adhered to the outer surface of the pressure sensor (2), and a front longitudinal resistance strain gauge (6) of the pressure sensor is adhered to the center of the outer surface of the front of the pressure sensor (2) along the central axis direction and is used for measuring the front longitudinal strain of the pressure sensor (2); a front transverse resistance strain gage (7) of the sensor is stuck along the direction vertical to the central axis at the center of the outer surface of the front for measuring the transverse strain of the front of the pressure sensor (2); two outgoing lines of a longitudinal resistance strain gauge (6) on the front surface of the sensor are respectively connected with one ends of a first shielding lead (18) and a second shielding lead (19) in a welding manner, and the other ends of the first shielding lead (18) and the second shielding lead (19) are connected with a bridge circuit corresponding to a strain gauge; two outgoing lines of the transverse resistance strain gauge (7) on the front surface of the sensor are respectively connected with one ends of a third shielding lead (20) and a fourth shielding lead (21) in a welding manner, and the other ends of the third shielding lead (20) and the fourth shielding lead (21) are connected with a bridge circuit corresponding to a strain gauge; a back longitudinal resistance strain gauge (8) of the sensor is stuck to the center of the outer surface of the back of the pressure sensor (2) along the central axis direction and is used for measuring the longitudinal strain of the back of the pressure sensor (2); a transverse resistance strain gauge (9) on the back surface of the sensor is stuck along the direction vertical to the central axis at the central position of the outer surface of the back surface and is used for measuring the transverse strain on the back surface of the pressure sensor (2); two outgoing lines of the longitudinal resistance strain gauge (8) on the reverse side of the sensor are respectively connected with one ends of a fifth shielding lead (22) and a sixth shielding lead (23) in a welding mode, and the other ends of the fifth shielding lead (22) and the sixth shielding lead (23) are connected with a bridge circuit corresponding to a strain gauge; two outgoing lines of the transverse resistance strain gauge (9) on the reverse side of the sensor are respectively connected with one ends of a seventh shielding lead (24) and an eighth shielding lead (25) in a welding manner, and the other ends of the seventh shielding lead (24) and the eighth shielding lead (25) are connected with a bridge circuit corresponding to a strain gauge; the resistance value of the sensor front longitudinal resistance strain gauge (6) is R1, the resistance value of the sensor front transverse resistance strain gauge (7) is R2, the resistance value of the sensor back longitudinal resistance strain gauge (8) is R3, and the resistance value of the sensor back transverse resistance strain gauge (9) is R4; the four resistance strain gauges are connected in a full-bridge mode through shielding wires and connected into a first channel of the strain gauge to form a Wheatstone bridge.
4. The combination of a resistive strain gauge pressure sensing and pressure bearing eccentricity detection as claimed in claim 1, wherein: two resistance strain gauges are adhered to the east outer surface of the pressure-bearing eccentric detector (4), and a detector east longitudinal resistance strain gauge (10) is adhered to the center of the east outer surface of the pressure-bearing eccentric detector (4) along the central axis direction and used for measuring the longitudinal strain of the east outer surface of the pressure-bearing eccentric detector (4); the east lateral resistance strain gauge (11) of the detector is stuck along the center position of the east lateral outer surface and is vertical to the central axis direction, and is used for measuring the lateral strain of the east lateral outer surface of the pressure-bearing eccentric detector (4); two outgoing lines of the longitudinal resistance strain gauge (10) on the east side of the detector are respectively connected with one ends of a ninth shielding lead (26) and a tenth shielding lead (27) in a welding mode, and the other ends of the ninth shielding lead (26) and the tenth shielding lead (27) are connected with a bridge circuit corresponding to the strain gauge; two outgoing lines of the east transverse resistance strain gauge (11) of the detector are respectively connected with one ends of an eleventh shielding lead (28) and a twelfth shielding lead (29) in a welding mode, and the other ends of the eleventh shielding lead (28) and the twelfth shielding lead (29) are connected with a bridge circuit corresponding to the strain gauge; the resistance value of the longitudinal resistance strain gauge (10) on the east side of the detector is R1, the resistance value of the transverse resistance strain gauge (11) on the east side of the detector is R2, the two resistance strain gauges are in half-bridge connection through a shielding lead and are connected into a second channel of the strain gauge to form a Wheatstone bridge; two resistance strain gauges are adhered to the south outer surface of the pressure-bearing eccentric detector (4), and a south longitudinal resistance strain gauge (12) of the detector is adhered to the center of the south outer surface of the pressure-bearing eccentric detector (4) along the central axis direction and is used for measuring the longitudinal strain of the south outer surface of the pressure-bearing eccentric detector (4); two outgoing lines of a south longitudinal resistance strain gauge (12) of the detector are respectively connected with one ends of a thirteenth shielding lead (30) and a fourteenth shielding lead (31) in a welding manner, and the other ends of the thirteenth shielding lead (30) and the fourteenth shielding lead (31) are connected with a bridge circuit corresponding to the strain gauge; two outgoing lines of the south-side transverse resistance strain gauge (13) of the detector are respectively connected with one ends of a fifteenth shielding lead (32) and a sixteenth shielding lead (33) in a welding mode, and the other ends of the fifteenth shielding lead (32) and the sixteenth shielding lead (33) are connected with a bridge circuit corresponding to a strain gauge; the resistance value of the south longitudinal resistance strain gauge (12) of the detector is R1, the resistance value of the south transverse resistance strain gauge (13) of the detector is R2, the two resistance strain gauges are in half-bridge connection through a shielding lead and are connected into a third channel of the strain gauge to form a Wheatstone bridge; two resistance strain gauges are adhered to the west outer surface of the pressure-bearing eccentric detector (4), and a west longitudinal resistance strain gauge (14) of the detector is adhered to the center of the west outer surface of the pressure-bearing eccentric detector (4) along the central axis direction and is used for measuring the longitudinal strain of the west outer surface of the pressure-bearing eccentric detector (4); a west lateral resistance strain gauge (15) of the detector is stuck along the direction of the central axis perpendicular to the center position of the west outer surface and is used for measuring the lateral strain of the west outer surface of the pressure-bearing eccentric detector (4); two outgoing lines of a west-side longitudinal resistance strain gauge (14) of the detector are respectively connected with one ends of a seventeenth shielding lead (34) and an eighteenth shielding lead (35) in a welding manner, the other ends of the seventeenth shielding lead (34) and the eighteenth shielding lead (35) are connected with a bridge circuit corresponding to the strain gauge, two outgoing lines of a west-side transverse resistance strain gauge (15) of the detector are respectively connected with one ends of a nineteenth shielding lead (36) and a twentieth shielding lead (37) in a welding manner, and the other ends of the nineteenth shielding lead (36) and the twentieth shielding lead (37) are connected with the bridge circuit corresponding to the strain gauge; the resistance value of the west-side longitudinal resistance strain gauge (14) of the detector is R1, the resistance value of the west-side transverse resistance strain gauge (15) of the detector is R2, the two resistance strain gauges are in half-bridge connection through a shielding lead and are connected into a fourth channel of the strain gauge to form a Wheatstone bridge; two resistance strain gauges are adhered to the outer surface of the north side of the pressure-bearing eccentric detector (4), and a longitudinal resistance strain gauge (16) of the north side of the detector is adhered to the center position of the outer surface of the north side of the pressure-bearing eccentric detector (4) along the central axis direction and is used for measuring the longitudinal strain of the outer surface of the north side of the pressure-bearing eccentric detector (4); two outgoing lines of a north longitudinal resistance strain gauge (16) of the detector are respectively connected with one ends of a twenty-first shielding lead (38) and a twenty-second shielding lead (39) in a welding manner, and the other ends of the twenty-first shielding lead (38) and the twenty-second shielding lead (39) are connected with a bridge circuit corresponding to a strain gauge; two outgoing lines of a north side transverse resistance strain gauge (17) of the detector are respectively connected with one ends of a twenty-third shielding lead (40) and a twenty-fourth shielding lead (41) in a welding mode, the other ends of the twenty-third shielding lead (40) and the twenty-fourth shielding lead (41) are connected with a bridge circuit corresponding to the strain gauge, the resistance value of a north side longitudinal resistance strain gauge (16) of the detector is R1, the resistance value of a north side transverse resistance strain gauge (17) of the detector is R2, the two resistance strain gauges are connected in a half-bridge mode through the shielding leads, and a fifth channel connected to the strain gauge forms a Wheatstone bridge.
5. The resistive strain pressure sensing and bearing eccentricity detection combiner of claim 3, wherein: a first shielding lead (18) and an eighth shielding lead (25) are connected to a binding post A of a first-channel bridge of the strain gauge, a second shielding lead (19) and a third shielding lead (20) are connected to a binding post B of the first-channel bridge of the strain gauge, a fourth shielding lead (21) and a fifth shielding lead (22) are connected to a binding post C of the first-channel bridge of the strain gauge, and a sixth shielding lead (23) and a seventh shielding lead (24) are connected to a binding post D of the first-channel bridge of the strain gauge.
6. The resistive strain pressure sensing and bearing eccentricity detection combiner of claim 4, wherein: a ninth shield conductor (26) is connected to the A terminal of the second path bridge of the strain gauge, a tenth shield conductor (27) and an eleventh shield conductor (28) are connected to the B terminal of the second path bridge of the strain gauge, and a twelfth shield conductor (29) is connected to the C terminal of the second path bridge of the strain gauge.
7. The resistive strain pressure sensing and bearing eccentricity detection combiner of claim 4, wherein:
the thirteenth shielding lead (30) is connected to the A binding post of the third channel bridge of the strain gauge, the fourteenth shielding lead (31) and the fifteenth shielding lead (32) are connected to the B binding post of the third channel bridge of the strain gauge, and the sixteenth shielding lead (33) is connected to the C binding post of the third channel bridge of the strain gauge.
8. The resistive strain pressure sensing and bearing eccentricity detection combiner of claim 4, wherein: and a seventeenth shielding lead (34) is connected to the A binding post of the fourth channel bridge of the strain gauge, an eighteenth shielding lead (35) and a nineteenth shielding lead (36) are connected to the B binding post of the fourth channel bridge of the strain gauge, and a twentieth shielding lead (37) is connected to the C binding post of the fourth channel bridge of the strain gauge.
9. The resistive strain pressure sensing and bearing eccentricity detection combiner of claim 4, wherein: a twenty-first shielding lead (38) is connected to an A terminal of a fifth channel bridge of the strain gauge, a twenty-second shielding lead (39) and a twenty-third shielding lead (40) are connected to a B terminal of the fifth channel bridge of the strain gauge, and a twenty-fourth shielding lead (41) is connected to a C terminal of the fifth channel bridge of the strain gauge.
10. The combination of a resistive strain gauge pressure sensing and pressure bearing eccentricity detection as claimed in claim 1, wherein: the resistance strain gauges adhered to the surfaces of the elastic elements of the resistance strain type pressure sensor and the pressure-bearing eccentric detection combiner are of the same type and have the same resistance value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121425901.7U CN214793555U (en) | 2021-06-25 | 2021-06-25 | Resistance strain type pressure sensing and pressure-bearing eccentric detection combiner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121425901.7U CN214793555U (en) | 2021-06-25 | 2021-06-25 | Resistance strain type pressure sensing and pressure-bearing eccentric detection combiner |
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| Publication Number | Publication Date |
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| CN214793555U true CN214793555U (en) | 2021-11-19 |
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| CN202121425901.7U Expired - Fee Related CN214793555U (en) | 2021-06-25 | 2021-06-25 | Resistance strain type pressure sensing and pressure-bearing eccentric detection combiner |
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| Country | Link |
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| CN (1) | CN214793555U (en) |
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- 2021-06-25 CN CN202121425901.7U patent/CN214793555U/en not_active Expired - Fee Related
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