Mass and torque combined measuring device and method

Abstract

The invention provides a mass and torque combined measuring device and method, and belongs to the technical field of metering equipment, the device comprises a device body, the device body comprises a bearing cover, a connecting column, a fixed connecting assembly, a photoelectric module, a magnetic steel assembly and a plurality of force transmission parts; according to the invention, mass measurement and torque measurement are integrated on one metering device, composite measurement of mass and torque under the same environment and condition can be realized, measurement errors caused by the metering device when the mass and the torque are measured at the same time are reduced, the measurement precision and the consistency of measurement data are improved, and the measurement efficiency is improved. Meanwhile, the measurement efficiency is improved, and the application requirements of an automatic production line or quick response measurement equipment can be well met.

Description

Technical Field

[0001] The invention belongs to the technical field of measuring equipment, and relates to the measurement technology of mass and torque, and specifically to a mass and torque composite measurement device and method. Background Art

[0002] With the continuous prosperity and development of my country's economy, my country's metrology industry has also made rapid progress. The metrology needs of all walks of life have become increasingly heavy, and the volume of metrology business has gradually increased. Mechanical metrology is an important branch of metrology, which involves mass metrology, capacity metrology, force measurement, pressure measurement, vacuum measurement, flow measurement, density measurement, speed measurement, torque measurement, vibration and impact measurement, acceleration measurement, etc. Among them, mass / torque measurement involves various industrial fields, including machinery manufacturing, automobiles, aerospace, construction, energy, etc. Therefore, mass / torque measurement is not only of great significance to scientific research, but also plays a huge role in people's livelihood fields such as trade settlement, medical and health care, and environmental monitoring.

[0003] In traditional metrology and measurement technology, mass / torque measurement needs to be measured separately with the help of different measuring instruments, that is, mass measurement equipment is used to measure mass, and torque measurement equipment is used to measure torque. When measuring separately, since the mass measurement equipment and the torque measurement equipment are different measuring instruments, the measured data are not measured in the same environment and conditions. There are not only measurement errors caused by the two measuring equipment, which affect the measurement accuracy; there is also a technical problem of low measurement efficiency, which cannot meet the application requirements of automated production lines or fast response measurement equipment. Summary of the invention

[0004] As described in the above background technology, traditionally, mass measurement and torque measurement are performed separately by two measuring devices. The two measuring devices have errors caused by measurement data deviation, resulting in technical problems such as low measurement accuracy and low measurement efficiency. To solve this technical problem, the present invention proposes a composite mass and torque measurement device and method.

[0005] The present invention integrates mass measurement and torque measurement into one measuring device, and can realize composite measurement of mass and torque under the same environment and conditions, thereby reducing the measurement error caused by the measuring device, improving the measurement accuracy, and at the same time improving the measurement efficiency, and can well meet the application requirements of automated production lines or rapid response measuring equipment.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] The present invention discloses a mass and torque composite measuring device, comprising a device body, wherein the device body comprises a bearing cover, a connecting column, a fixed connecting assembly, a photoelectric module and a plurality of force transmission components;

[0008] The bearing cover is used to bear the object to be measured and to apply gravity and torque to the connecting column;

[0009] The fixed connection assembly is arranged side by side with the bearing cover and is used to fixedly connect the optoelectronic module and the plurality of force transmission components;

[0010] The connecting column is connected to the bearing cover;

[0011] A plurality of the force transmission components are connected side by side between the bearing cover and the fixed connection assembly and are distributed along the circumference of the connection column. An angle exists between the plane where each force transmission component and the bearing cover are located and between the plane where each force transmission component and the fixed connection assembly are located, so that the plurality of force transmission components have a tendency to be twisted, so as to transmit torque.

[0012] The photoelectric module is connected to the connecting column and is used to generate a changing photoelectric signal based on the photoelectric effect under the gravity and torsional force of the connecting column;

[0013] When the object to be measured acts on the bearing cover, the coupling model of mass and torque is determined based on the changing photoelectric signal and the distance that the center of the connecting column deviates from the center of the bearing cover, and the composite measurement of mass and torque is realized based on the coupling model of mass and torque;

[0014] Among them, the coupling model of mass and torque is:

[0015]

[0016] T is the torque, unit: N·m; K is the strain coefficient of the material used for the connecting column and the force transmission component, dimensionless; ΔS T is the photoelectric signal difference generated based on the changing photoelectric signal, unit: mV; β is the proportional coefficient of the photoelectric signal and the angle, unit: mV / rad; L is the distance between the torque application point and the center of the connecting column, unit: m; m is the mass, unit: kg; g is the gravitational acceleration, unit: N / kg; d is the distance between the center of the connecting column and the center of the bearing cover, unit: m.

[0017] It is further defined that each of the force transmission components includes a plurality of force transmission rods connected in sequence from top to bottom, and two adjacent force transmission rods are connected by a force transmission spring, and the thickness of the force transmission spring ranges from 0.08 mm to 0.12 mm.

[0018] It is further defined that an upper fixed protrusion is provided on the top of the force transmission component, and the bearing cover is connected to the force transmission component through the upper fixed protrusion; a lower fixed protrusion is provided on the bottom of the force transmission component, and the fixed connection assembly is connected to the force transmission component through the lower fixed protrusion.

[0019] It is further defined that a preload adjusting member is provided at the connection between the fixed connection assembly and the force transmission member, and the preload adjusting member is used to adjust the preload force between the force transmission member and the fixed connection assembly.

[0020] It is further defined that the optoelectronic module includes an optical gap plate, an optoelectronic module mounting seat, a transmission line, a terminal block, an optoelectronic signal transmitting module and an optoelectronic signal receiving module, the optoelectronic module mounting seat is fixedly connected to the fixed connection component, the terminal block, the optoelectronic signal transmitting module and the optoelectronic signal receiving module are all connected to the optoelectronic module mounting seat, and a gap is provided between the optoelectronic signal transmitting module and the optoelectronic signal receiving module; one end of the optical gap plate is connected to the connecting column, and the other end is provided with an optical gap and extends into the gap;

[0021] The photoelectric signal receiving module is electrically connected to the wiring terminal, and the transmission line is electrically connected to the wiring terminal.

[0022] It is further defined that the mass and torque composite measuring device further comprises a magnetic steel component, the magnetic steel component is located below the fixed connection component and connected to the fixed connection component; the magnetic steel component is electrically connected to the transmission line of the photoelectric module;

[0023] The connecting column extends to the bottom of the fixed connecting assembly and is connected to the magnetic steel assembly, and the magnetic steel assembly is used to balance the gravity and torque on the connecting column;

[0024] The connecting column drives the light gap on the light gap plate to deflect under the action of gravity and torsional force, so that the photoelectric signal received by the photoelectric signal receiving module changes, thereby generating a changed photoelectric signal.

[0025] It is further defined that the magnetic steel assembly includes a yoke, a permanent magnet, a magnetizing agent and a coil arranged in the permanent magnet, the yoke is provided with a accommodating cavity, the permanent magnet and the magnetizing agent are arranged in the accommodating cavity from top to bottom in sequence, the coil on the permanent magnet is electrically connected to the transmission line; the connecting column is connected to the permanent magnet; the fixed connection assembly is fixedly connected to the yoke; and magnetic gaps are provided between the yoke and the permanent magnet and between the yoke and the magnetizing agent.

[0026] It is further defined that the fixed connection assembly includes an upper flange and a lower flange, the upper flange is fixedly connected to the lower flange, and the upper flange and the lower flange are both arranged side by side with the bearing cover; the optoelectronic module and multiple force transmission components are all connected to the upper flange.

[0027] The present invention provides a mass and torque composite measurement method, comprising the following steps:

[0028] S1: Install the above-mentioned mass and torque composite measuring device;

[0029] S2: When the load cover does not carry the object to be measured, the load cover is in a balanced state;

[0030] When the carrying cover carries the object to be measured, the object to be measured applies gravity and torque to the connecting column, and the connecting column is axially deformed, so that the photoelectric module generates a changing photoelectric signal based on the photoelectric effect under the gravity and torsional force of the connecting column;

[0031] S3: Determine the coupling model of mass and torque based on the changing photoelectric signal and the distance between the center of the connecting column and the center of the bearing cover, and realize the composite measurement of mass and torque based on the coupling model of mass and torque;

[0032] Among them, the coupling model of mass and torque is:

[0033]

[0034] T is the torque, unit: N·m; K is the strain coefficient of the material used for the connecting column and the force transmission component, dimensionless; ΔS T is the photoelectric signal difference generated based on the changing photoelectric signal, unit: mV; β is the proportional coefficient of the photoelectric signal and the angle, unit: mV / rad; L is the distance between the torque application point and the center of the connecting column, unit: m; m is the mass, unit: kg; g is the gravitational acceleration, unit: N / kg; d is the distance between the center of the connecting column and the center of the bearing cover, unit: m.

[0035] Further defined, the calculation model of mass is:

[0036]

[0037] Where m is mass, unit: kg; g is gravitational acceleration, unit: N / kg; K is the strain coefficient of the material used for the connecting column and the force transmission component, dimensionless; a is the proportional coefficient between the photoelectric signal and the gravity of the object to be measured, unit: mV / N; S g is the total amplitude of the photoelectric signal, unit: Mv; ΔS T is the photoelectric signal difference generated based on the changing photoelectric signal, unit: mV; γ is the influence coefficient of torque on the total amplitude of the photoelectric signal, dimensionless.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] 1. The present invention provides a composite mass and torque measuring device, which bears gravity and torque through a connecting column and transmits torque through a force transmission component; under the action of gravity and torque force of the connecting column, the photoelectric module generates a changing photoelectric signal based on the photoelectric effect, and determines the coupling model of mass and torque based on the changing photoelectric signal and the distance of the center of the connecting column from the center of the bearing cover, and realizes the composite mass and torque measurement based on the coupling model of mass and torque. The present invention integrates mass measurement and torque measurement into one metering device, and can realize composite measurement of mass and torque under the same environment and conditions, reducing the measurement error caused by the metering device when measuring mass and torque at the same time, improving the measurement accuracy and consistency of the measurement data, and also improving the measurement efficiency, which can well meet the application requirements of automated production lines or fast response measurement equipment.

[0040] 2. The present invention designs the force transmission component as a plurality of force transmission rods connected in sequence from top to bottom, and arranges a force transmission spring between two adjacent sections of the force transmission rods. Meanwhile, the thickness of the force transmission spring is limited to between 0.08 mm and 0.12 mm, which can improve the measurement sensitivity while transmitting force.

[0041] 3. The present invention provides a preload adjusting member at the connection between the fixed connection component and the force transmission component. The preload adjusting member can be used to adjust the preload between the force transmission component and the fixed connection component, thereby realizing independent adjustment of the preload between each force transmission component and the fixed connection component, which is convenient for calibration.

[0042] 4. The present invention integrates mass measurement and torque measurement into one measuring device, which reduces the workload during calibration of the mass measurement device and the torque measurement device on the one hand, and on the other hand, users do not need to purchase the mass measurement device and the torque measurement device separately, thus reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is an overall schematic diagram of the mass and torque composite measuring device of the present invention;

[0044] Figure 2 It is a structural schematic diagram of the mass and torque composite measuring device of the present invention;

[0045] Figure 3 It is a schematic diagram of the structure of the photovoltaic module;

[0046] Figure 4 It is a schematic diagram of the installation of the photovoltaic module and the connecting column;

[0047] Figure 5 is a schematic diagram of the structure of the bearing cover;

[0048] Figure 6 It is a structural schematic diagram of the force transmission component;

[0049] Figure 7 Schematic diagram of the connecting column structure Figure 1 ;

[0050] Figure 8 It is the structural schematic diagram of the upper flange;

[0051] Fig. 9 It is the structural schematic diagram of the lower flange;

[0052] Fig.10 It is a schematic diagram of the connection between the lower flange and the yoke;

[0053] Fig.11 Schematic diagram of the connection between the permanent magnet and the yoke;

[0054] Fig.12 It is a schematic diagram of the connection between the permanent magnet, the yoke and the magnetizing agent;

[0055] Fig.13 It is a schematic diagram of the connection between the permanent magnet and the connecting column;

[0056] Fig.14 Schematic diagram of the connecting column structure Figure 2 ;

[0057] Fig.15 This is a schematic diagram of the installation of the temperature sensor;

[0058] Fig.16 is a structural schematic diagram of a light gap plate;

[0059] Fig.17 It is a structural schematic diagram of the photovoltaic module mounting seat;

[0060] In the figure, 1-device body, 2-control module, 3-display module, 4-bearing cover, 5-force transmission component, 6-connecting column, 7-adjusting bolt, 8-upper flange, 9-lower flange, 10-light gap plate, 11-photoelectric module mounting seat, 12-transmission line, 13-connecting terminal, 14-force transmission spring, 15-adjusting bolt hole, 16-lower fixing protrusion, 17-upper fixing protrusion, 18-threaded hole under the connecting column, 19-threaded hole in the middle of the connecting column, 20-threaded hole on the connecting column Hole, 21- threaded hole of upper flange, 22- fixing groove of upper flange, 23- countersunk hole of lower flange, 24- bolt hole of lower flange, 25- countersunk bolt of lower flange, 26- threaded hole of permanent magnet, 27- coil, 28- yoke, 29- bolt hole of coil, 30- permanent magnet, 31- magnetization, 32- bolt on connecting column, 33- temperature sensor, 34- light gap, 35- photoelectric signal transmitting module, 36- photoelectric signal receiving module, 37- shaft shoulder, 38- magnetic gap. DETAILED DESCRIPTION

[0061] The technical solution of the present invention is further explained below in conjunction with the accompanying drawings and embodiments, but the present invention is not limited to the implementation modes described below.

[0062] See also Figure 2 The present invention discloses a mass and torque composite measuring device, comprising a device body 1, wherein the device body 1 comprises a bearing cover 4, a connecting column 6, a fixed connecting component, a photoelectric module, a magnetic steel component and a plurality of force transmission components 5;

[0063] The bearing cover 4 is used to bear the object to be measured and to apply gravity and torque to the connecting column 6;

[0064] A fixed connection component, arranged side by side with the bearing cover 4, used for fixedly connecting the optoelectronic module, the magnetic steel component and the plurality of force transmission components 5;

[0065] The connecting column 6 has one end connected to the bearing cover 4, and the other end passes through the fixed connection assembly and is connected to the magnetic steel assembly located below the fixed connection assembly, so as to transfer gravity to the magnetic steel assembly, and the magnetic steel assembly is used to balance the gravity and torque on the connecting column 6; specifically, during operation, when a torque load or mass load is applied to the bearing cover 4, the connecting column 6 will be subjected to a vertical downward load F f , the connecting column 6 will produce a vertical downward displacement under the action of the above load, and the magnetic steel assembly will generate an electromagnetic force F in a vertical upward direction. m , so that F m =F f , so that the connecting column 6 is in a dynamic equilibrium state, thereby preventing the connecting column 6 from being damaged due to overload.

[0066] A plurality of force transmission components 5 are connected side by side between the bearing cover 4 and the fixed connection assembly, and are distributed along the circumference of the connection column 6. An angle exists between each force transmission component 5 and the plane where the bearing cover 4 is located, and between each force transmission component 5 and the plane where the fixed connection assembly is located, so that the plurality of force transmission components 5 have a tendency to be twisted;

[0067] The photoelectric module is connected to the connecting column 6 and is used to generate a changing photoelectric signal based on the photoelectric effect under the gravity and torsional force of the connecting column 6; when the object to be measured acts on the carrying cover 4, the coupling model of mass and torque is determined based on the changing photoelectric signal and the distance that the center of the connecting column 6 deviates from the center of the carrying cover 4, and the mass and torque composite measurement is realized based on the coupling model of mass and torque;

[0068] Among them, the coupling model of mass and torque is:

[0069]

[0070] T is the torque, unit: N·m; K is the strain coefficient of the material used for the connecting column 6 and the force transmission component 5 (the connecting column 6 and the force transmission component 5 use the same material), dimensionless; ΔS T is the photoelectric signal difference generated based on the changing photoelectric signal, unit: mV; β is the proportional coefficient of the photoelectric signal and the angle, unit: mV / rad; L is the distance between the torque application point and the center of the connecting column 6, unit: m; m is the mass, unit: kg; g is the gravitational acceleration, unit: N / kg; d is the distance between the center of the connecting column 6 and the center of the supporting cover 4, unit: m.

[0071] The magnetic steel assembly is electrically connected to the photoelectric module.

[0072] As a preferred embodiment of the present invention, the connecting column 6 is connected to the center position of the supporting cover 4, and the connecting column 6 passes through the fixed connection component along the center position of the fixed connection component and is connected to the magnetic steel component, and the magnetic steel component and the connecting column 6 are coaxially arranged.

[0073] Specifically, the number of the force transmission components 5 can be 3, 4, 5, or even more, and the present invention does not specifically limit the number of the force transmission components 5. As a preferred embodiment of the present invention, in the present invention, the number of the force transmission components 5 is 5.

[0074] The present invention integrates mass measurement and torque measurement into one metering device, and can realize composite measurement of mass and torque under the same environment and conditions, thereby reducing the measurement error caused by the metering device when simultaneously measuring mass and torque, improving the measurement accuracy and consistency of the measurement data, and at the same time improving the measurement efficiency, which can well meet the application requirements of automated production lines or rapid response measurement equipment.

[0075] See also Figure 6 Each force transmission component 5 includes a plurality of force transmission rods connected in sequence from top to bottom, and two adjacent force transmission rods are connected by a force transmission spring 14, and the thickness of the force transmission spring 14 ranges from 0.08 mm to 0.12 mm.

[0076] Each force transmission component 5 may include 2 force transmission rods, 3 force transmission rods, 4 force transmission rods, or even more force transmission rods. As a preferred embodiment of the present invention, each force transmission component 5 includes 3 force transmission rods, namely the first force transmission rod, the second force transmission rod, and the third force transmission rod. The top end of the first force transmission rod is connected to the bearing cover 4, the bottom end of the first force transmission rod is connected to the top end of the second force transmission rod through the force transmission spring 14, the bottom end of the second force transmission rod is connected to the top end of the third force transmission rod through the force transmission spring 14, and the bottom end of the third force transmission rod is connected to the fixed connection assembly.

[0077] The thickness of the force transmission reed 14 can specifically be 0.08mm, 0.09mm, 0.10mm, 0.11mm or 0.12mm. As a preferred embodiment of the present invention, the thickness of the force transmission reed 14 is less than or equal to 0.10mm, that is, the preferred value of the thickness of the force transmission reed 14 is 0.08mm, 0.09mm or 0.10mm.

[0078] The present invention designs the force transmission component 5 as a plurality of force transmission rods connected in sequence from top to bottom, and arranges a force transmission spring 14 between two adjacent sections of the force transmission rods. Meanwhile, the thickness of the force transmission spring 14 is limited to between 0.08 mm and 0.12 mm, so that the force transmission spring 14 can improve the measurement sensitivity while transmitting force.

[0079] The fixed connection assembly includes an upper flange 8 and a lower flange 9, the upper flange 8 is fixedly connected to the lower flange 9, and the upper flange 8 and the lower flange 9 are arranged side by side with the bearing cover 4; the magnetic steel assembly is located below the lower flange 9 and is fixedly connected to the lower flange 9, and the optoelectronic module and multiple force transmission components 5 are connected to the upper flange 8. For details, see Figure 8 and Fig. 9 An upper flange threaded hole 21 is provided on the upper flange 8, and a lower flange bolt hole 24 is provided on the lower flange 9. Flange bolts penetrate through the upper flange threaded hole 21 and the lower flange bolt hole 24, and the upper flange 8 and the lower flange 9 are fixedly connected by the flange bolts.

[0080] See also Figure 3 , Figure 6 and Figure 8 , an upper fixing protrusion 17 is provided on the top of the force transmission component 5, and the bearing cover 4 is connected to the force transmission component 5 through the upper fixing protrusion 17; a lower fixing protrusion 16 is provided on the bottom of the force transmission component 5, and the fixed connection assembly is connected to the force transmission component 5 through the lower fixing protrusion 16. Specifically, a card slot matching the shape of the upper fixing protrusion 17 is provided on the bottom end surface of the bearing cover 4, and the upper fixing protrusion 17 extends into the card slot and is engaged with the card slot, so that the bearing cover 4 is connected to the force transmission component 5; an upper flange fixing groove 22 matching the shape of the lower fixing protrusion 16 is provided on the top end surface of the upper flange 8, and the lower fixing protrusion 16 extends into the upper flange fixing groove 22 and is engaged with the upper flange fixing groove 22, so that the upper flange 8 is connected to the force transmission component 5.

[0081] See also Figure 2A preload adjusting member is provided at the connection between the fixed connection component and the force transmission component 5, and the preload adjusting member is used to adjust the preload between the force transmission component 5 and the fixed connection component. Specifically, the preload adjusting member is a threaded connection member. As a preferred embodiment of the present invention, the preload adjusting member is an adjusting bolt 7. An adjusting bolt hole 15 is provided at the bottom of the force transmission component 5. The adjusting bolt 7 penetrates the adjusting bolt hole 15 and is connected to the upper flange 8, so that the force transmission component 5 and the upper flange 8 are preloaded.

[0082] See also Figure 5 , Figure 7 and Fig.14 A connecting column threaded hole 20 is provided on the top end surface of the connecting column 6, and a countersunk hole is provided at the midline position of the bearing cover 4. The connecting column bolt 32 passes through the countersunk hole and extends into the connecting column threaded hole 20 to fix the bearing cover 4 and the connecting column 6.

[0083] See also Figure 4 , Fig.13 , Fig.16 and Fig.17 In the present invention, the photoelectric module includes a light gap plate 10, a photoelectric module mounting seat 11, a transmission line 12, a wiring terminal 13, a photoelectric signal transmitting module 35 and a photoelectric signal receiving module 36. The photoelectric module mounting seat 11 is fixedly connected to the fixed connection component, the wiring terminal 13, the photoelectric signal transmitting module 35 and the photoelectric signal receiving module 36 are all connected to the photoelectric module mounting seat 11, and a gap is set between the photoelectric signal transmitting module 35 and the photoelectric signal receiving module 36; one end of the light gap plate 10 is connected to the connecting column 6, and the other end is provided with a light gap 34 and extends into the gap; the photoelectric signal receiving module 36 is electrically connected to the wiring terminal 13, one end of the transmission line 12 is electrically connected to the wiring terminal 13, and the other end is electrically connected to the magnetic steel component; the connecting column 6 drives the light gap 34 on the light gap plate 10 to deflect under the action of gravity and torsional force, so that the optical signal received by the photoelectric signal receiving module 36 changes, generates a changed electric potential energy, and transmits the changed electric potential energy to the magnetic steel component through the wiring terminal 13 and the transmission line 12 in sequence. Specifically, the optoelectronic module mounting seat 11 is fixedly connected to the upper end surface of the upper flange 8 .

[0084] See also Fig.12 In the present invention, the magnetic steel assembly includes a yoke 28, a permanent magnet 30, a magnetizing agent 31 and a coil 27 arranged in the permanent magnet 30. A receiving cavity is arranged on the yoke 28, and the permanent magnet 30 and the magnetizing agent 31 are arranged in the receiving cavity from top to bottom. The coil 27 on the permanent magnet 30 is electrically connected to the transmission line 12; the connecting column 6 is connected to the permanent magnet 30; the fixed connection assembly is fixedly connected to the yoke 28; a magnetic gap 38 is arranged between the yoke 28 and the permanent magnet 30 and between the yoke 28 and the magnetizing agent 31.

[0085] See also Fig.10 A lower flange countersunk hole 23 is provided on the lower flange 9 , and a lower flange countersunk bolt 25 passes through the lower flange countersunk hole 23 and is connected to the yoke 28 , thereby achieving a fixed connection between the lower flange 9 and the yoke 28 .

[0086] See also Figure 7 and Fig. 9 A connecting column lower threaded hole 18 is provided on the lower end surface of the connecting column 6, and a permanent magnet threaded hole 26 is provided on the permanent magnet 30. The connecting column 6 and the permanent magnet 30 are fixedly connected by a screw extending into the connecting column lower threaded hole 18 and the permanent magnet threaded hole 26.

[0087] See also Figure 7 A connecting column middle threaded hole 19 is provided in the middle of the connecting column 6 , and the connecting column 6 is fixedly connected to the light gap plate 10 by means of screws that pass through the light gap plate 10 and extend into the connecting column middle threaded hole 19 .

[0088] See also Figure 7 As a preferred embodiment of the present invention, a shoulder 37 is provided on both the upper end surface of the connecting column 6 and the lower end surface of the connecting column 6, and the shoulder 37 facilitates the installation of the connecting column 6 with the supporting cover 4 and the yoke 28.

[0089] See also Fig.11 A coil bolt hole 29 is provided on the yoke 28 , and the coil 27 is led out through the coil bolt hole 29 and electrically connected to the transmission line 12 .

[0090] As a preferred embodiment of the present invention, see Figure 1 The present invention provides a mass and torque composite measuring device, which further includes a control module 2 and a display module 3. The control module 2 is electrically connected to the coil 27 in the permanent magnet 30. The control module 2 is connected to the display module 3 in a communication manner. The communication connection is a wired connection or a wireless connection. Preferably, the communication connection is a wired connection. The control module 2 is used to determine the mass and torque according to the coupling model of mass and torque and the calculation model of mass, and transmit the calculated mass and torque to the display module 3 for display through the display module 3.

[0091] Preferably, see Fig.15 The device body 1 of the present invention also includes a temperature sensor 33 installed on the bottom end surface of the yoke 28. The temperature sensor 33 is connected to the display module 3 for communication. The communication connection is a wired connection or a wireless connection. Preferably, the communication connection is a wired connection. The temperature sensor 33 transmits the measured temperature data to the display module 3, and the display module 3 displays the temperature data.

[0092] The present invention also provides a mass and torque composite measurement method, which is applied to the above-mentioned mass and torque composite measurement device and comprises the following steps:

[0093] S1: Install the above-mentioned mass and torque composite measuring device;

[0094] S2: when the carrying cover 4 does not carry the object to be measured, the carrying cover 4 is in a balanced state;

[0095] When the carrying cover 4 carries the object to be measured, the object to be measured applies gravity and torque to the connecting column 6, and the connecting column 6 is axially deformed, so that the photoelectric module generates a changing photoelectric signal based on the photoelectric effect under the gravity and torsional force of the connecting column 6;

[0096] S3: Determine the coupling model of mass and torque based on the changed photoelectric signal and the distance between the center of the connecting column 6 and the center of the bearing cover 4, and realize the composite measurement of mass and torque based on the coupling model of mass and torque;

[0097] Among them, the coupling model of mass and torque is:

[0098]

[0099] T is the torque, unit: N·m; K is the strain coefficient of the material used for the connecting column 6 and the force transmission component 5 (the connecting column 6 and the force transmission component 5 use the same material), dimensionless; ΔS T is the photoelectric signal difference generated based on the changing photoelectric signal, unit: mV; β is the proportional coefficient of the photoelectric signal and the angle, unit: mV / rad; L is the distance between the torque application point and the center of the connecting column 6, unit: m; m is the mass, unit: kg; g is the gravitational acceleration, unit: N / kg; d is the distance between the center of the connecting column 6 and the center of the supporting cover 4, unit: m.

[0100] The calculation model of quality is:

[0101]

[0102] Wherein, m is mass, unit: kg; g is gravitational acceleration, unit: N / kg; K is the strain coefficient of the material used for the connecting column 6 and the force transmission component 5 (the connecting column 6 and the force transmission component 5 use the same material), dimensionless; a is the proportional coefficient between the photoelectric signal and the gravity of the object to be measured, unit: mV / N; S g is the total amplitude of the photoelectric signal, unit: Mv; ΔS T is the photoelectric signal difference generated based on the changing photoelectric signal, unit: mV; γ is the influence coefficient of torque on the total amplitude of the photoelectric signal, dimensionless.

[0103] In the above formula, a, β, γ and K are all determined based on experiments, and the determination process is:

[0104] A series of known masses m are applied to the mass and torque composite measurement of the present invention. i The weights (note: in this process, the mass and torque composite measurement needs to be placed in a horizontal state, and the mass center of the weights should be aligned with the center of the mass and torque composite measurement to avoid the influence of the additional torque), and the photoelectric signal amplitude S corresponding to different weights is recorded. g , S g =(S left +S right ) / 2,S left and S right are the left difference of the photoelectric signal under gravity and the right difference of the photoelectric signal under torque respectively; after each weight is loaded, the photoelectric signal amplitude S g Calculate the corresponding gravity F g , gravity F g The calculation formula is:

[0105]

[0106] F g With S g The experimental data are fitted to obtain the values ​​of K and a.

[0107] Through experiments, it can be found that the typical range of a is (10 3 ~10 5 )mV / N, in this application, a is 10 3 mV / N.

[0108] β represents the proportional coefficient of the photoelectric signal and the angle. Place the mass and torque composite measurement on an adjustable tilting platform, adjust the platform tilt angle θ (note: avoid loading additional mass during this process, and ensure that the center of the tilting platform is aligned with the center of the mass and torque composite measurement), and record the photoelectric signal difference ΔS generated by the changing photoelectric signal at each angle. T =S left -S right , establish ΔS T The linear relationship with the platform inclination angle θ is:

[0109] ΔS T =β·θ

[0110] In the formula, ΔS T is the photoelectric signal difference generated based on the changing photoelectric signal, unit: mV; θ is the platform inclination angle, unit: rad.

[0111] ΔS T Fitting with θ to obtain the proportionality coefficient, it can be obtained through experiments that the typical range of β is (10~10 3)mV / rad, and the preferred value of β in this application is 500mV / rad.

[0112] It should be noted that the mass and torque compound measurement method of the present invention is completely corresponding to the above-mentioned mass and torque compound measurement device. For the structure and principle not fully described in the mass and torque compound measurement method, please refer to the description of the above-mentioned mass and torque compound measurement device.

[0113] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit the present application. Although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the present application.

Claims

1. A mass and torque composite measuring device, characterized in that: The device comprises a device body (1), wherein the device body (1) comprises a bearing cover (4), a connecting column (6), a fixed connecting component, a photoelectric module and a plurality of force transmission components (5); The bearing cover (4) is used to bear the object to be measured and to apply gravity and torque to the connecting column (6); The fixed connection assembly is arranged side by side with the bearing cover (4) and is used to fixedly connect the photoelectric module and the plurality of force transmission components (5); The connecting column (6) is connected to the supporting cover (4); A plurality of the force transmission components (5) are connected in parallel between the bearing cover (4) and the fixed connection assembly and are distributed along the circumference of the connection column (6); an angle is formed between the plane where each force transmission component (5) and the bearing cover (4) are located and between the plane where each force transmission component (5) and the fixed connection assembly are located, so that the plurality of force transmission components (5) have a tendency to be twisted, and are used to transmit torque; The photoelectric module is connected to the connecting column (6) and is used to generate a changing photoelectric signal based on the photoelectric effect under the action of gravity and torsional force of the connecting column (6); When the object to be measured acts on the bearing cover (4), a coupling model of mass and torque is determined based on the changing photoelectric signal and the distance that the center of the connecting column (6) deviates from the center of the bearing cover (4), and a composite measurement of mass and torque is achieved based on the coupling model of mass and torque; Among them, the coupling model of mass and torque is: T is the torque, unit: N·m; K is the strain coefficient of the material used for the connecting column (6) and the force transmission component (5), dimensionless; ΔS T is the photoelectric signal difference generated based on the changing photoelectric signal, unit: mV; β is the proportionality coefficient between the photoelectric signal and the angle, unit: mV / rad; L is the distance between the torque application point and the center of the connecting column (6), unit: m; m is the mass, unit: kg; g is the gravitational acceleration, unit: N / kg; d is the distance between the center of the connecting column (6) and the center of the bearing cover (4), unit: m.

2. The mass and torque composite measuring device according to claim 1, characterized in that: Each of the force transmission components (5) comprises a plurality of force transmission rods connected in sequence from top to bottom, and two adjacent force transmission rods are connected via a force transmission spring (14), wherein the thickness of the force transmission spring (14) ranges from 0.08 mm to 0.12 mm.

3. The mass and torque composite measuring device according to claim 1, characterized in that: An upper fixed protrusion (17) is arranged on the top of the force transmission component (5), and the bearing cover (4) is connected to the force transmission component (5) via the upper fixed protrusion (17); a lower fixed protrusion (16) is arranged on the bottom of the force transmission component (5), and the fixed connection assembly is connected to the force transmission component (5) via the lower fixed protrusion (16).

4. The mass and torque composite measuring device according to claim 3 is characterized in that: A preload adjusting member is provided at the connection between the fixed connection component and the force transmission component (5), and the preload adjusting member is used to adjust the preload force between the force transmission component (5) and the fixed connection component.

5. The mass and torque composite measuring device according to claim 1, characterized in that: The optoelectronic module comprises an optical gap plate (10), an optoelectronic module mounting seat (11), a transmission line (12), a wiring terminal (13), an optoelectronic signal transmitting module (35) and an optoelectronic signal receiving module (36); the optoelectronic module mounting seat (11) is fixedly connected to a fixed connection component; the wiring terminal (13), the optoelectronic signal transmitting module (35) and the optoelectronic signal receiving module (36) are all connected to the optoelectronic module mounting seat (11); a gap is provided between the optoelectronic signal transmitting module (35) and the optoelectronic signal receiving module (36); one end of the optical gap plate (10) is connected to a connecting column (6); the other end is provided with an optical gap (34) and extends into the gap; The photoelectric signal receiving module (36) is electrically connected to the wiring terminal (13), and the transmission line (12) is electrically connected to the wiring terminal (13).

6. The mass and torque composite measuring device according to claim 5, characterized in that: The mass and torque composite measuring device further comprises a magnetic steel component, the magnetic steel component is located below the fixed connection component and is connected to the fixed connection component; the magnetic steel component is electrically connected to the transmission line (12) of the photoelectric module; The connecting column (6) extends to the bottom of the fixed connection assembly and is connected to the magnetic steel assembly, and the magnetic steel assembly is used to balance the gravity and torque exerted on the connecting column (6); The connecting column (6) drives the light gap (34) on the light gap plate (10) to deflect under the action of gravity and torsional force, so that the photoelectric signal received by the photoelectric signal receiving module (36) changes, thereby generating a changed photoelectric signal.

7. The mass and torque composite measuring device according to claim 6, characterized in that: The magnetic steel assembly comprises a yoke (28), a permanent magnet (30), a magnetizing magnet (31), and a coil (27) arranged in the permanent magnet (30); the yoke (28) is provided with a receiving cavity, the permanent magnet (30) and the magnetizing magnet (31) are arranged in the receiving cavity in sequence from top to bottom, the coil (27) on the permanent magnet (30) is electrically connected to the transmission line (12); the connecting column (6) is connected to the permanent magnet (30); the fixed connection assembly is fixedly connected to the yoke (28); and a magnetic gap (38) is provided between the yoke (28) and the permanent magnet (30) and between the yoke (28) and the magnetizing magnet (31).

8. The mass and torque composite measuring device according to claim 1, characterized in that: The fixed connection assembly comprises an upper flange (8) and a lower flange (9), wherein the upper flange (8) is fixedly connected to the lower flange (9), and the upper flange (8) and the lower flange (9) are arranged side by side with the bearing cover (4); the photoelectric module and the plurality of force transmission components (5) are connected to the upper flange (8).

9. A composite mass and torque measurement method, characterized in that: The following steps are involved: S1: Installing and forming the mass and torque composite measuring device as claimed in claim 1; S2: when the carrying cover (4) does not carry the object to be measured, the carrying cover (4) is in a balanced state; When the carrying cover (4) carries the object to be measured, the object to be measured applies gravity and torque to the connecting column (6), causing the connecting column (6) to deform axially, so that the photoelectric module generates a changing photoelectric signal based on the photoelectric effect under the action of the gravity and torsional force of the connecting column (6); S3: determining a coupling model of mass and torque based on the changed photoelectric signal and the distance of the center of the connecting column (6) from the center of the bearing cover (4), and realizing composite measurement of mass and torque based on the coupling model of mass and torque; Among them, the coupling model of mass and torque is: T is the torque, unit: N·m; K is the strain coefficient of the material used for the connecting column (6) and the force transmission component (5), dimensionless; ΔS T is the photoelectric signal difference generated based on the changing photoelectric signal, unit: mV; β is the proportionality coefficient between the photoelectric signal and the angle, unit: mV / rad; L is the distance between the torque application point and the center of the connecting column (6), unit: m; m is the mass, unit: kg; g is the gravitational acceleration, unit: N / kg; d is the distance between the center of the connecting column (6) and the center of the bearing cover (4), unit: m.

10. The mass and torque composite measurement method according to claim 9, characterized in that: The calculation model of quality is: Wherein, m is mass, unit: kg; g is gravitational acceleration, unit: N / kg; K is the strain coefficient of the material used for the connecting column (6) and the force transmission component (5), dimensionless; a is the proportional coefficient between the photoelectric signal and the gravity of the object to be measured, in mV / N; S g is the total amplitude of the photoelectric signal, unit: Mv; ΔS T It is the photoelectric signal difference generated based on the changing photoelectric signal, unit: mV; γ is the coefficient of influence of torque on the total amplitude of photoelectric signal, which is dimensionless.

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