Multi-sensor data collection equipment

Abstract

The utility model discloses a multi-sensor data collection device, which comprises a plurality of pressure sensors used for collecting axial forces of corresponding tool heads and a data processing module, and the data processing module comprises a signal amplification unit, a path selection unit, a control unit and a communication unit which are connected in sequence. The pressure sensor is connected with the signal amplification unit; the pressure sensor is connected with the tool head through a shaft sleeve, one end of the shaft sleeve is sealed, the other end of the shaft sleeve is open, a mounting hole used for fixedly mounting the tool head is formed in the sealed end of the shaft sleeve, the other end of the shaft sleeve is slidably connected to the mandrel in a sleeving mode in the axial direction of the mandrel, and the pressure sensor is located in the shaft sleeve. The pressure sensor is arranged between the sealing end of the shaft sleeve and the end face of the mandrel. The multi-sensor data collection equipment meets the requirements of long-time, uninterrupted and continuous data collection in the incremental forming process.

Description

Technical Field

[0001] The utility model relates to the technical field of data acquisition equipment, in particular to a multi-sensor data collection device. Background Art

[0002] Vibration progressive forming is a new type of moldless flexible manufacturing technology. It consists of a single or multiple tool heads guided by CNC equipment in the form of contour lines, through single-point or multi-point continuous local plastic deformation, and finally achieves the target shape of the product. Therefore, this forming process does not require a special mold, has a large forming limit, good repeatability, and can process free-form surfaces with complex shapes. It is suitable for small-batch, multi-variety, and complex-shaped sheet metal parts processing in the aerospace and automotive industries, and has a very attractive development prospect. However, the theoretical development of this technology is still immature, the process parameters are not perfect, and the practical application is greatly restricted.

[0003] Incremental forming products of sheet metal usually have industrial defects such as cracks, wrinkles, metal accumulation, dents, and springback. During the forming process, forming force is an important influencing factor. The multi-point incremental forming process of sheet metal generally takes from a few minutes to tens of minutes, and it is necessary to detect the changes in force throughout the process. This requires the system to have high reliability and be able to collect data uninterruptedly. At present, the forming force collection time in the incremental forming process is long and the amount of data is large. It is necessary to design a multi-sensor data collection device to detect the incremental forming force throughout the process. Utility Model Content

[0004] In view of the defects in the prior art, the utility model provides a multi-sensor data collection device to solve the technical problems raised in the background technology.

[0005] A multi-sensor data collection device, comprising a plurality of pressure sensors for collecting corresponding tool head axial forces and a data processing module, wherein the data processing module comprises a signal amplification unit, a path selection unit, a control unit and a communication unit connected in sequence, and the pressure sensor is connected to the signal amplification unit;

[0006] The pressure sensor is connected to the tool head through a sleeve, one end of the sleeve is sealed and the other end is open, the sealed end of the sleeve has a mounting hole for fixing the tool head, the other end of the sleeve is axially slidably sleeved on the core shaft, the pressure sensor is located inside the sleeve, and the pressure sensor is located between the sealed end of the sleeve and the end face of the core shaft.

[0007] Furthermore, a signal line is passed through the core shaft, one end of the signal line is connected to the pressure sensor, and the other end of the signal line is connected to the signal amplification unit.

[0008] Furthermore, the inner wall of the sleeve is provided with a slide groove extending along its axial direction, and the outer wall of the core shaft is fixedly provided with a pin key corresponding to the slide groove, and the pin key slides along the slide groove.

[0009] Furthermore, the model of the pressure sensor is HD-BLR-1 - resistance strain tension and compression load sensor.

[0010] Furthermore, the signal amplifying unit includes an amplifier and a peripheral circuit, and the model of the amplifier is AD620.

[0011] Furthermore, the model of the routing unit is G5V-2 micro relay.

[0012] Furthermore, the control unit includes a single chip microcomputer and an AD conversion circuit, the path selection unit is connected to the AD conversion circuit, the AD conversion circuit is connected to the single chip microcomputer, and the single chip microcomputer is connected to the path selection unit.

[0013] Furthermore, the model of the single chip microcomputer is AT89S51.

[0014] Furthermore, the model of the AD conversion circuit is AD574.

[0015] Furthermore, the communication unit is an RS232 module.

[0016] The beneficial effects of the utility model are embodied in:

[0017] The multi-sensor data collection equipment meets the requirements of the incremental forming process for long-term, uninterrupted and continuous data collection. It has the characteristics of simple use, good stability, high precision and strong anti-interference ability. It is suitable for low-speed data detection occasions, low cost and has good use value and promotion and application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0019] The accompanying drawings herein are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification are used to explain the principles of the present application. For ordinary technicians in this field, other accompanying drawings can also be obtained based on these accompanying drawings without paying creative labor.

[0020] Figure 1 A system structure block diagram of a multi-sensor data collection device provided by an embodiment of the utility model;

[0021] Figure 2 A schematic diagram of the installation structure of the pressure sensor provided in the embodiment of the utility model;

[0022] Figure 3 A schematic diagram of the circuit structure of a signal amplifying unit provided in an embodiment of the utility model;

[0023] The realization of the purpose, functional features and advantages of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings. The above-mentioned drawings have shown clear embodiments of this application, which will be described in more detail later. These drawings and textual descriptions are not intended to limit the scope of the concept of this application in any way, but to illustrate the concept of this application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0024] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0025] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0026] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0027] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0028] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0030] like Figure 1 As shown, the utility model provides a multi-sensor data collection device, including multiple pressure sensors and a data processing module for collecting the corresponding axial force of the tool head, wherein the data processing module includes a signal amplification unit, a path selection unit, a control unit and a communication unit connected in sequence, and the pressure sensor is connected to the signal amplification unit.

[0031] The multi-point progressive forming process of sheet metal generally takes from several minutes to tens of minutes, and the force changes need to be detected throughout the process. This requires the data collection equipment to have high reliability, be able to collect data uninterruptedly, and continuously store large amounts of data.

[0032] During the incremental forming process, the tool head will be subjected to very complex forces, so it must have high strength to achieve a certain stability. This application adopts a sleeve structure, such as Figure 2 As shown. The pressure sensor 4 is connected to the tool head 2 through the sleeve 1. One end of the sleeve 1 is sealed and the other end is open. The sealed end of the sleeve 1 has a mounting hole for fixing the tool head 2. The other end of the sleeve 1 is axially slidably sleeved on the mandrel 3. The mandrel 3 is installed on the clamping device of the numerical control equipment. The pressure sensor 4 is arranged inside the sleeve 1. The pressure sensor 4 is arranged between the sealed end of the sleeve 1 and the end face of the mandrel 3. A signal line 5 is passed through the mandrel 3. One end of the signal line 5 is connected to the pressure sensor 4 and the other end is connected to the signal amplification unit.

[0033] The inner wall of the sleeve 1 is provided with a slide groove 6 extending along its axial direction, and the outer wall of the core shaft 3 is fixedly provided with a pin key 7 corresponding to the slide groove 6. The pin key 7 slides along the slide groove 6, so that the sleeve 1 can only slide axially along the core shaft 3.

[0034] Its working principle is as follows: During the machining process, the tool head 2 is mainly subjected to axial force and tangential force. The axial force is transmitted from the sleeve 1 to the pressure sensor 4, and then transmitted from the pressure sensor 4 to the mandrel 3 and then to the clamping device behind. During the transmission process, the pressure sensor 4 between the sleeve 1 and the mandrel 3 senses the force and converts it into an electrical signal, which is transmitted to the signal amplification unit through the signal line 5. The sleeve 1 offsets the tangential force under the constraint of the pin key 7, so that the tool head 2 can only produce axial displacement relative to the mandrel 3 under the action of the axial force. The tool head 2 is threadedly connected to the mounting hole on the sleeve 1 to facilitate the replacement of tool heads with different radii.

[0035] In this embodiment, the model of the pressure sensor 4 is HD-BLR-1 - resistance strain tension and compression load sensor.

[0036] In this embodiment, the signal amplification unit includes an amplifier and a peripheral circuit. The model of the amplifier is AD620. The pressure sensor outputs a millivolt output signal. The input range of the control unit is 0 to 10V. Therefore, the amplifier is required to have a higher gain amplification factor. The circuit structure of the signal amplification unit is as follows: Figure 3 shown.

[0037] In this embodiment, the model of the route selection unit is G5V-2 micro relay. The control unit includes a single chip microcomputer and an AD conversion circuit. The route selection unit is connected to the AD conversion circuit, the AD conversion circuit is connected to the single chip microcomputer, and the single chip microcomputer is connected to the route selection unit. The model of the single chip microcomputer is AT89S51. The model of the AD conversion circuit is AD574. The communication unit is an RS232 module.

[0038] In this embodiment, three pressure sensors 4 are provided, and three channels can be collected in turn at the same time, or the single-chip program can be changed to collect only one channel of signal. The force signals on different tool heads are converted into voltage signals by the pressure sensor and sent to different channels, and wait for the selection signal after amplification and filtering by AD620. The three ports of the AT89S51 chip control three G5V-2 relays to select the three channels in turn. After the signal on the selected channel is converted by double-precision AD574 analog-to-digital conversion, it is controlled and processed by AT89S51 and sent to the serial communication data line of the RS232 module, and then the next channel is selected. The PC receives the data on the serial communication line and saves it.

[0039] After the microcontroller selects the next channel, it delays 10 cycles to notify the AD574 chip to perform the next conversion and send data to the microcontroller. This cycle repeats, selecting in turn, and continuously collecting data, and the data is only limited by the storage space.

[0040] In summary, the multi-sensor data collection equipment of the present application meets the requirements of the incremental forming process for long-term, uninterrupted and continuous data collection. It has the characteristics of simple use, good stability, high precision and strong anti-interference ability. It is suitable for low-speed data detection occasions, has low cost, and has great use value and promotion and application value.

[0041] Finally, it should be noted that the various technical features of the technical solution of the present application can be combined arbitrarily. In order to make the description concise, not all possible combinations of the various technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of the present application.

[0042] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments may still be modified, or some or all of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and should all be included in the scope of the claims and specification of the present invention.

Claims

1. A multi-sensor data collection device, characterized in that: It includes a plurality of pressure sensors and a data processing module for collecting the corresponding axial force of the tool head, wherein the data processing module includes a signal amplification unit, a path selection unit, a control unit and a communication unit connected in sequence, and the pressure sensor is connected to the signal amplification unit; The pressure sensor is connected to the tool head (2) via a sleeve (1); one end of the sleeve (1) is sealed and the other end is open; the sealed end of the sleeve (1) has a mounting hole for fixing the tool head (2); the other end of the sleeve (1) is axially slidably sleeved on the core shaft (3); the pressure sensor (4) is arranged inside the sleeve (1); the pressure sensor (4) is arranged between the sealed end of the sleeve (1) and the end face of the core shaft (3).

2. A multi-sensor data collection device according to claim 1, characterized in that: A signal line (5) is passed through the core shaft (3), one end of the signal line (5) is connected to the pressure sensor (4), and the other end is connected to the signal amplification unit.

3. A multi-sensor data collection device according to claim 1, characterized in that: The inner wall of the shaft sleeve (1) is provided with a slide groove (6) extending along its axial direction, and the outer wall of the core shaft (3) is fixedly provided with a pin key (7) corresponding to the slide groove (6), and the pin key (7) slides along the slide groove (6).

4. The multi-sensor data collection device according to claim 1, characterized in that: The model of the pressure sensor (4) is HD-BLR-1 - resistance strain tension and compression load sensor.

5. The multi-sensor data collection device according to claim 1, characterized in that: The signal amplifying unit comprises an amplifier and a peripheral circuit, and the model of the amplifier is AD620.

6. The multi-sensor data collection device according to claim 1, characterized in that: The model of the routing unit is G5V-2 micro relay.

7. The multi-sensor data collection device according to claim 1, characterized in that: The control unit includes a single chip microcomputer and an AD conversion circuit, the path selection unit is connected to the AD conversion circuit, the AD conversion circuit is connected to the single chip microcomputer, and the single chip microcomputer is connected to the path selection unit.

8. The multi-sensor data collection device according to claim 7, characterized in that: The model of the single chip microcomputer is AT89S51.

9. The multi-sensor data collection device according to claim 7, characterized in that: The model of the AD conversion circuit is AD574.

10. The multi-sensor data collection device according to claim 1, characterized in that: The communication unit is an RS232 module.

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