CN114102134A

CN114102134A - Sensor and assembling equipment of sensor

Info

Publication number: CN114102134A
Application number: CN202111501277.9A
Authority: CN
Inventors: 吕海涛; 陈涛; 姚文英; 汪健; 倪志红; 杨道平
Original assignee: Affiliated Childrens Hospital of Soochow University
Current assignee: Affiliated Childrens Hospital of Soochow University
Priority date: 2021-12-09
Filing date: 2021-12-09
Publication date: 2022-03-01

Abstract

The invention provides a sensor and assembling equipment of the sensor, and the assembling equipment comprises a conveying device, and a lower cover feeding device, a first pressing device, a film feeding device, an upper cover feeding device, a second pressing device, a blanking device and the like which are matched with the conveying device and sequentially arranged along the running direction of the conveying device. The assembly equipment can realize automatic cutting and installation of the film sheet, and the assembled sensor product has high qualification rate; the automation degree of the whole assembly process of the sensor is high, the assembly is accurate, the labor force can be saved, and the production efficiency is improved.

Description

Sensor and assembling equipment of sensor

Technical Field

The invention relates to the technical field of sensor production equipment, in particular to a sensor and sensor assembling equipment.

Background

In the existing production line, the film sensor is mostly produced and processed in a manual mode or a semi-mechanical mode, the steps of cutting, installing and the like of a film part are involved in the production and processing process of the film sensor, and the problems of inaccurate cutting, damage, installation displacement and the like of the film are easily caused in the cutting, grabbing and installing processes due to the fact that the film is thin in thickness and small in required size, so that the defective rate of products is high, the qualified rate is low, and the production cost is increased; and the problems of low production efficiency, limited productivity, high rejection rate and the like exist in manual or semi-mechanical processing.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides the sensor and the assembly equipment of the sensor, the assembly equipment of the sensor can realize the automatic cutting and installation of the film sheet, and the product qualification rate is high; the automation degree of the whole assembly process of the sensor is high, the labor force can be saved, and the production efficiency is improved.

In order to achieve the purpose, the invention adopts the following technical scheme:

the equipment of sensor, including conveyer and with conveyer looks adaptation, edge lower cover loading attachment, first closing device, film loading attachment, upper cover loading attachment, second closing device and unloader that conveyer traffic direction set gradually:

the conveying device comprises an annular track and a die holder arranged on the annular track, and the die holder runs along with the annular track;

the lower cover feeding device comprises a lower cover conveying mechanism and a lower cover grabbing mechanism, wherein the lower cover grabbing mechanism is used for positioning a lower cover body on the lower cover conveying mechanism in the die holder;

the first pressing device is used for pressing and limiting the lower cover body in the die holder;

the film feeding device comprises a blanking mechanism and a film grabbing mechanism, wherein the blanking mechanism is used for punching a film sheet from a film belt, and the film grabbing mechanism is used for grabbing the film sheet to a lower cover body tightly pressed in the die holder;

the upper cover feeding device comprises an upper cover conveying mechanism and an upper cover grabbing mechanism, wherein the upper cover grabbing mechanism is used for positioning an upper cover body on the upper cover conveying mechanism on the lower cover body on which the thin film sheet is placed;

the second pressing device is used for pressing and covering the upper cover body and the lower cover body;

the blanking device is used for taking down the sensor assembled on the conveying device.

In one embodiment of the present application, the lower cover gripping mechanism and the upper cover gripping mechanism each include:

a first bracket;

the first sliding rail is arranged on the first support along the horizontal direction;

the first support is slidably mounted on the first sliding rail;

the first cylinder is arranged on the first support, is connected with the first support and is used for driving the first support to reciprocate along the first sliding rail;

the second sliding rail is arranged on the first support along the vertical direction;

the finger cylinder is slidably mounted on the second slide rail and used for grabbing the lower cover body/the upper cover body;

and the second cylinder is arranged on the first support, is connected with the finger cylinder and is used for driving the finger cylinder to reciprocate along the second sliding rail.

In an embodiment of this application, the lower cover snatchs in the mechanism the finger cylinder is equipped with the reference column, the reference column is located a plurality of pneumatic clamp and indicates in the middle of, with the inside cavity looks adaptation of lower lid.

In an embodiment of the present application, the first pressing device and the second pressing device are identical in structure, and each of the first pressing device and the second pressing device includes:

a second bracket;

the third sliding rail is vertically arranged on the second bracket;

the second support is slidably mounted on the third slide rail;

the third cylinder is arranged on the second support, is connected with the second support and is used for driving the second support to reciprocate along the third slide rail;

and the abutting part is arranged on the second support and is used for contacting with the part to be pressed to realize downward pressing.

In one embodiment of the present application, the abutment comprises:

the third support is connected with the second support and moves along with the second support, and an elastic mounting hole with an opening at the lower part is formed in the third support;

the elastic rod penetrates through the elastic mounting hole from bottom to top and can move up and down along the elastic mounting hole;

and the sensor is arranged at the upper part of the elastic mounting hole and used for detecting a contact signal or a pressure signal from the elastic rod.

In one embodiment of the present application, the blanking mechanism includes:

the die plate is provided with a punched film hole;

the film belt conveying roller group is used for conveying a film belt to enable the film belt to pass through the lower part of the template in a tensioning mode;

the blanking air cylinder is arranged below the die plate and the film belt, a blanking film head is arranged at the output end of the blanking air cylinder, the blanking air cylinder operates and drives the blanking film head to penetrate through the blanking film hole, the film belt is blanked, and a blanked film sheet is ejected to the upper portion of the die plate.

In one embodiment of the present application, the set of film belt transfer rollers comprises a pair of step rollers including a drive roller and a driven roller disposed up and down:

the driving roller is horizontally arranged behind the template and is connected with the stepping motor;

the driven roller is parallel to the driving roller and is installed on the ground through a fourth cylinder, and the fourth cylinder can adjust the distance between the driven roller and the driving roller.

In one embodiment of the present application, the film gripping mechanism comprises:

a third support;

the fourth sliding rail is arranged on the third bracket along the horizontal X direction;

the fourth support is slidably mounted on the fourth slide rail;

the fifth cylinder is arranged on the third support, is connected with the fourth support and is used for driving the fourth support to reciprocate along the fourth sliding rail;

the fifth sliding rail is arranged on the fourth support along the vertical Y direction;

the fifth support is slidably mounted on the fifth slide rail;

the sixth air cylinder is arranged on the fourth support, connected with the fifth support and used for driving the fifth support to reciprocate along the fifth sliding rail;

the sixth sliding rail is arranged on the fifth support along the horizontal Z direction;

the film grabbing head is slidably mounted on the sixth sliding rail;

the seventh cylinder is arranged on the fifth support, is connected with the grabbing film head and is used for driving the grabbing film head to reciprocate along the sixth sliding rail;

the X direction, the Y direction and the Z direction are mutually vertical, the X direction and the Z direction are parallel to a horizontal plane, and the Y direction is superposed with the gravity direction;

the film grabbing head is used for grabbing the film sheets on the template into the lower cover body on the die holder.

In an embodiment of this application, snatch the membrane head and include two, blanking membrane hole is equipped with 4, snatch the membrane head and move along the Z direction can correspond with 1, 3 or 2, 4 in the blanking membrane hole respectively.

A sensor, comprising:

a quadrilateral bridge circuit is formed by 4 resistance strain gauges;

a voltage controlled oscillator circuit connected to the bridge circuit to output an oscillation frequency signal according to an output voltage of the bridge circuit;

a limiter circuit connected to the voltage controlled oscillator circuit to prevent attenuation of the oscillation frequency signal;

the frequency discriminator circuit is connected with the amplitude limiter circuit so as to carry out frequency modulation-amplitude modulation and frequency modulation conversion on the oscillation frequency signal to obtain a voltage signal;

and the amplifier circuit is connected with the frequency discriminator circuit so as to amplify and output the voltage signal.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the assembling equipment of the sensor, the die holder is arranged in the conveying device of the assembling equipment, the die holder is matched with the lower cover body, the lower cover body is sequentially placed on the die holder by the lower cover feeding device, and the lower cover body is pressed and limited in the die holder by the first pressing device, so that the subsequent assembling operation is more accurate, and the precision is high; the film feeding device is arranged to punch the film sheets and grab and place the film sheets in the lower cover body, so that the film feeding device is accurate in cutting and installation, the problems of film damage and installation displacement are not easy to occur, and the product percent of pass is high; set up and cover loading attachment and second closing device, the accuracy is located down on the lid with the upper cover lid to compressing tightly the lid with upper cover and lower lid and closing, the sensor that the equipment was accomplished takes off through unloader, and whole equipment process automation degree is high, need not manual operation, and production speed is fast, and the equipment accuracy is high, and product percent of pass and product quality all improve.

2. The elastic rod and the inductor are arranged on the abutting part of the first pressing device and the second pressing device, so that the pressing condition of the abutting part can be accurately controlled, the pressing operation can be accurately in place, and the sensor part cannot be damaged.

3. The blanking mechanism is provided with a template, so that blanking film holes in the template are correspondingly matched with blanking film heads, and automatic, accurate and quick blanking of film sheets is realized.

4. The film belt conveying roller set is provided with a stepping roller pair, so that tensioning and accurate delivery of the film belt are realized, and the position of a driven roller can be adjusted up and down, so that the film belt is convenient to mount and dismount.

5. The film grabbing mechanism is provided with a fourth slide rail, a fifth slide rail and a sixth slide rail, so that the grabbing film head can be adjusted in X, Y, Z three directions, and the film taking and placing and the corresponding film hole punching are realized. Set up sixth slide rail and seventh cylinder, can transversely adjust the position of snatching the membrane head, make that snatch the membrane head better correspond with the blanking membrane hole to the realization is changed 4 stations of blanking membrane hole and 2 stations of snatching the membrane head.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is an overall schematic block diagram of an assembling apparatus of the present invention.

Fig. 2 is a schematic perspective view of the conveyor of the present invention.

Fig. 3 is an enlarged schematic view of a portion a of fig. 2 according to the present invention.

Fig. 4 is a schematic perspective view of a lower cover feeding device according to the present invention.

Fig. 5 is an enlarged structural view of the portion B in fig. 4 according to the present invention.

Fig. 6 is a schematic perspective view of the first pressing device or the second pressing device according to the present invention.

Fig. 7 is a schematic perspective view of a film feeding device according to the present invention.

Fig. 8 is an enlarged structural view of the portion C of fig. 7 according to the present invention.

Fig. 9 is a schematic three-dimensional structure diagram of the film feeding device in the invention.

Fig. 10 is a schematic perspective view of the upper cover loading device of the present invention.

Fig. 11 is an enlarged view of portion D of fig. 10 according to the present invention.

Fig. 12 is a schematic perspective view of the blanking device of the present invention.

Fig. 13 is a schematic perspective view of the tray conveying device of the present invention.

Fig. 14 is a schematic diagram of the circuit principle of the sensor in the present invention.

FIG. 15 is a schematic circuit diagram of a sensor according to the present invention.

Reference numerals:

100. a conveying device;

11. an annular track; 12. a die holder; 121. a die cavity; 13. a power base; 14. a driven seat;

200. a lower cover feeding device; 201. positioning the probe;

21. a lower cover conveying mechanism; 22. a lower cover grabbing mechanism; 221. a first bracket; 222. a first slide rail; 223. a first support; 224. a first cylinder; 225. a second slide rail; 226. a finger cylinder; 2261. a positioning column; 2262. pneumatic clamping fingers; 227. a second cylinder;

300. a first pressing device;

31. a second bracket; 32. a third slide rail; 33. a second support; 34. a third cylinder; 35. an abutting portion; 351. a third support; 352. an elastic rod; 353. an inductor;

400. a film feeding device;

41. a template; 411. punching a film hole; 42. blanking the air cylinder; 421. blanking a film head; 43. a pair of stepping rollers; 431. a drive roll; 432. a driven roller; 433. a stepping motor; 434. a fourth cylinder; 44. a third support; 441. a fourth slide rail; 442. a fifth cylinder; 45. a fourth support; 451. a fifth slide rail; 452. a sixth cylinder; 46. a fifth support; 461. a sixth slide rail; 462. a seventh cylinder; 47. grabbing the membrane head;

500. covering a feeding device;

51. an upper cover conveying mechanism; 52. an upper cover grabbing mechanism;

600. a second pressing device;

700. a blanking device;

71. a gantry; 72. a seventh slide rail; 73. a sixth support; 74. a clamping member; 75. a positioner;

800. a tray conveying device;

81. a material tray; 82. a frame; 83. a transfer motor; 84. a conveyor belt;

900. a sensor;

91. a lower cover body; 92. a film sheet; 920. a film tape; 93. and an upper cover body.

Detailed Description

In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate an orientation or positional relationship based on that shown in the drawings, or the orientation or positional relationship conventionally used in the use of the products of the present invention, or the orientation or positional relationship conventionally understood by those skilled in the art, are merely for convenience and simplicity of description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1, an embodiment of the present invention provides an assembling apparatus of a sensor, which is suitable for automatic assembling of a thin film sensor. The assembling equipment comprises a conveying device 100 provided with an annular rail 11, a lower cover feeding device 200, a first pressing device 300, a film feeding device 400, an upper cover feeding device 500, a second pressing device 600, a blanking device 700 and the like, wherein the lower cover feeding device 200, the first pressing device 300, the film feeding device 400, the upper cover feeding device 500, the second pressing device 600 and the blanking device 700 are matched with the position of the annular rail 11 of the conveying device 100 and are sequentially arranged along the running direction of the annular rail 11.

As shown in fig. 2 and 3, the conveying device 100 includes an annular rail 11 and a plurality of die holders 12 disposed on the annular rail 11, wherein the die holders 12 are uniformly distributed on the annular rail 11 and move along with the annular rail 11. One end of the annular track is provided with a power seat 13, the other end of the annular track is provided with a driven seat 14, and the annular track 11 is driven by the power seat 13 to drive the die holder 12 to operate. The die holder 12 is provided with a die cavity 121 matched with the outer surface of the lower cover 91 of the sensor to be assembled, so that the lower cover 91 can be accurately positioned and placed, and the assembling process is more accurate.

As shown in fig. 4 and 5, the lower cap feeding device 200 includes a lower cap conveying mechanism 21 and a lower cap gripping mechanism 22 which are coupled. Wherein, the lower cover conveying mechanism 21 is used for conveying the lower cover body 91 of the sensor 900; the lower cover grabbing mechanism 22 is used for grabbing the lower cover body 91 on the lower cover conveying mechanism 21 and positioning and placing the lower cover body 91 on the die holder 12 on the annular rail 11, so that the lower cover body 91 is accurately placed in the die cavity 121.

Specifically, the lower cover gripping mechanism 22 includes a first support 221 for bearing, a first slide rail 222 is installed on the first support 221 along the horizontal direction, and the first slide rail 222 spans between the lower cover conveying mechanism 21 and the lower cover feeding station of the circular track 11. A first support 223 is slidably mounted on the first slide rail 222, a first cylinder 224 is mounted on the first support 221 at one side end of the first slide rail 222, the first cylinder 224 is connected to the first support 223, and the first cylinder 224 operates to drive the first support 223 to reciprocate (i.e., move horizontally) along the first slide rail 222. A second slide rail 225 is arranged on the first support 223 along the vertical direction, and a finger cylinder 226 is arranged on the second slide rail 226 in a sliding way; and a second cylinder 227 is mounted at one end of the first support 223, which is located on the second slide rail 225, the second cylinder 227 is connected with the finger cylinder 226, and the second cylinder 227 operates to drive the finger cylinder 226 to reciprocate (i.e., move up and down) along the second slide rail 225. The finger cylinder 226 is provided with at least two pneumatic gripping fingers 2262, and the finger cylinder 226 in the lower cover gripping mechanism 22 operates to grip the lower cover 91.

The in-place probes 201 are respectively mounted at two end portions of the first slide rail 222, and are used for accurately controlling the first support 223 to horizontally move to the lower cover body grabbing station and the lower cover body feeding station, so that the finger cylinder 226 is ensured to accurately grab the lower cover body 91 and accurately place the lower cover body 91 in the die cavity 121 of the die holder 12 on the lower cover body feeding station, and the in-place probes 201 play roles in positioning and protecting.

Further, as shown in fig. 5, the finger cylinder 226 of the lower cover gripping mechanism 22 is provided with a positioning column 2261, and the positioning column 2261 is located in the middle, i.e., in the center, of the plurality of pneumatic clamping fingers 2262. The positioning column 2261 is matched with the inner cavity of the lower cover body 91, when grabbing, the positioning column 2261 is inserted into the lower cover body 91, and the pneumatic clamping finger 2262 is clamped by the outer side, so that stable and accurate grabbing of the lower cover body 91 is guaranteed.

As shown in fig. 6, the first pressing device 300 is used for pressing and limiting the lower cover body 91 placed on the die holder 12 by the lower cover feeding device 200 in the die cavity 121 of the die holder 12, so as to realize accurate positioning of the lower cover body 91 and lay a foundation for accurate installation of the subsequent film sheet 92.

Specifically, the first pressing device 300 includes a second bracket 31 for supporting, a third slide rail 32 is vertically mounted on the second bracket 31, and a second support 33 is slidably mounted on the third slide rail 32. A third cylinder 34 is mounted on the second bracket 31 at one end of the third slide rail 32, the third cylinder 34 is connected to the second support 33, and the third cylinder 34 is operated to drive the second support 33 to reciprocate, i.e., move up and down, along the third slide rail 32. The lower part of the second seat 33 is mounted with an abutting part 35, and the abutting part 35 is used for contacting with a part to be pressed (here, the lower cover body 91) to realize downward pressing.

Wherein the abutting portion 35 includes a third seat 351 connected to a lower portion of the second seat 33, the third seat 351 being movable with the second seat 33. The third support 351 is provided with an elastic mounting hole (not shown in the figure) with an opening at the lower part, an elastic rod 352 is movably mounted in the elastic mounting hole, the elastic rod 352 penetrates through the elastic mounting hole from bottom to top, and the lower part of the elastic rod 352 is arranged outside the elastic mounting hole and is used for contacting with a part to be pressed. The upper part of the elastic force mounting hole is provided with a sensor 353, and the sensor 353 is matched with the elastic force rod 352 to control the pressing accuracy.

In one embodiment, sensor 353 is a contact sensor; the spring part is arranged in the elastic mounting hole, when the elastic rod 352 is pressed down to contact with a part to be pressed, the spring part is compressed by upward acting force, the elastic rod 352 moves upwards, and when the upper end of the elastic rod 352 is contacted with the sensor 353, the sensor 353 detects the contact signal to indicate that the pressing operation is finished. At this time, the third air cylinder 34 stops driving the second support 33 downward, and the third air cylinder 34 starts driving the second support 33 upward.

In another embodiment, sensor 353 is a pressure sensor; when the elastic rod 352 is acted upon by an upward force, the force is transmitted to the sensor 353, and when the sensor 353 detects that the pressure signal reaches a preset value, the pressing operation is completed. At this time, the third air cylinder 34 stops driving the second support 33 downward, and the third air cylinder 34 starts driving the second support 33 upward.

The lower end of the spring rod 352 is provided with a resilient abutment head to avoid damaging the sensor 900 components at the location to be compressed when pressed down.

As shown in fig. 7 to 9, the film feeding apparatus 400 includes a blanking mechanism and a film gripping mechanism. The blanking mechanism is used for blanking the film sheet 92 from the film strip 920; the film grabbing mechanism is used for grabbing the punched film to the annular rail 11 and accurately placing the film in the lower cover body 91 tightly pressed in the die holder 12.

As shown in fig. 7, the blanking mechanism includes a die plate 41, a film tape feed roller group, a blanking cylinder 42, and the like. The die plate 41 is fixed horizontally in an overhead manner and is provided with a punched film hole 411. And a film strip conveying roller group for conveying the film strip 920 to enable the film strip 920 to pass through the lower part of the template 41 in a tensioning mode. The blanking air cylinder 42 is positioned below the template 41 and the tensioned film strip 920, the blanking film head 421 is arranged at the output end of the blanking air cylinder 42, the blanking film head 421 is matched with the blanking film hole 411, the blanking air cylinder 42 drives the blanking film head 421 to move up and down and can upwards penetrate through the blanking film hole 411, the tensioned film strip 920 is blanked to form a film sheet 92 with a corresponding size, the blanked film sheet 92 is pushed to the upper side of the template 41, and the film sheet is grabbed by the film grabbing mechanism.

As shown in fig. 7 and 9, the film tape conveying roller group includes a plurality of conveying rollers and a pair of stepping roller pairs 43. The pair of stepping rollers 43 is provided on the rear side (the discharge side corresponding to the feed side of the film tape 920) of the platen 41, and the pair of stepping rollers 43 includes a driving roller 431 and a driven roller 432 provided vertically. The driving roller 431 is horizontally positioned and installed behind the template 41, the roller surface of the driving roller is flush with the lower surface of the template 41, and the end part of the driving roller 431 is connected with the stepping motor 433 and is driven by the stepping motor 433 to operate. The driven roller 432 is positioned below the drive roller 431 and is parallel to the drive roller 431; the driven roller 432 is connected with the output end of the fourth air cylinder 434, and the fourth air cylinder 434 is vertically installed on the ground; the fourth cylinder 434 operates to drive the driven roller 432 to move up and down, so that the distance between the driven roller 432 and the driving roller 431 can be adjusted, and the film belt 920 can be conveniently mounted and dismounted. When the driven roller 432 approaches the driving roller 431, the film strip 920 is clamped, and the advancing distance and speed of the film strip 920 are controlled by the operation of the stepping motor 433, corresponding to the operation of the blanking cylinder 42.

As shown in fig. 7 and 8, the film gripping mechanism includes a third support 44 for supporting, a fourth slide rail 441 is disposed on the third support 44 along the horizontal X direction, the fourth slide rail 441 straddles over the film feeding station on the mold plate 41 and the circular rail 11, and a fourth support 45 is slidably mounted thereon. A fifth cylinder 442 is disposed at an end of the fourth slide rail 441 on the third support 44, the fifth cylinder 442 is connected to the fourth support 45, and the fifth cylinder 442 operates to drive the fourth support 45 to reciprocate along the fourth slide rail 441 in the horizontal X direction. A fifth slide rail 451 is arranged on the fourth support 45 along the vertical Y direction, and a fifth support 46 is slidably arranged on the fifth slide rail 451; a sixth air cylinder 452 is further mounted on the fourth support 45, and the sixth air cylinder 452 is connected to the fifth support 46 and is used for driving the fifth support 46 to reciprocate along the fifth slide rail 451 in the vertical Y direction. A sixth slide rail 461 arranged along the horizontal Z direction is mounted on the fifth support 46, and a film grabbing head 47 is slidably mounted on the sixth slide rail 461; the fifth support 46 is provided with a seventh air cylinder 462, and the seventh air cylinder 462 is connected with the film grabbing head 47 and used for driving the film grabbing head 47 to reciprocate on a sixth slide rail 461 along the horizontal Z direction. Specifically, the X direction, the Y direction, and the Z direction are directions shown in fig. 7, the X direction, the Y direction, and the Z direction are perpendicular to each other, the X direction and the Z direction are parallel to a horizontal plane, and the Y direction coincides with the gravity direction, that is, the film gripping mechanism can achieve movement adjustment in a three-dimensional space.

The grabbing film head 47 is used for grabbing and transferring the film sheet 92 blanked by the blanking film head 421 to a film feeding station of the annular rail 11, and accurately placing the film sheet in the lower cover 91 on the die holder 12, so that grabbing and accurate installation of the film sheet 92 are realized.

The in-place probes 201 are also respectively mounted at two ends of the fourth slide rail 441 on the third bracket 44, and the in-place probes 201 are used for accurately controlling the fourth support 45 to move to the film blanking station and the film loading station along the horizontal X direction, so that the film grabbing head 47 accurately grabs the film sheet 92 and accurately places the film sheet 92 in the lower cover body 91 on the film loading station.

In one embodiment, the film grabbing heads 47 comprise two, and the corresponding die holder 12 is provided with two die grooves 121 corresponding to the two film grabbing heads 47; the number of the blanking film holes 411 is 4, and the film grabbing head 47 moves along the Z direction to correspond to the 1 st and 3 rd positions or the 2 nd and 4 th positions of the 4 blanking film holes 411 respectively. The sixth sliding rail 461 and the seventh air cylinder 462 are arranged to enable the grabbing film head 47 to move and adjust the position along the Z direction, so that the position adjustment of the grabbing film head 47 and the plurality of punching film holes 411 is realized, and the conversion of 4 stations for punching the film holes 411 and 2 stations for grabbing the film head 47/the die cavity 12 is realized. Of course, the number of the blanking film holes 411 on the mold plate 41 may also be 2, 6, 8, or 10, and the like, and may be set according to specific requirements.

The blanking film head 421 and the film grabbing head 47 can be set as negative pressure film heads, and the film heads can form low-pressure negative pressure to suck the film belt or the film sheet. Because the film thickness is thinner, the film sheet 92 is easy to shift or fall off after blanking, so that the grabbing and mounting are inaccurate, and the arrangement of the negative pressure film head can avoid shifting and increase the accuracy of assembly.

As shown in fig. 10, the upper lid feeding device 500 includes an upper lid conveying mechanism 51 and an upper lid gripping mechanism 52. The upper cover conveying mechanism 51 is used for conveying the upper cover body 93, and the upper cover grabbing mechanism 52 is used for grabbing and transferring the upper cover body 93 on the upper cover conveying mechanism 51 to an upper cover feeding station of the annular rail 11, and accurately placing the upper cover body on the lower cover body 91 at the upper cover feeding station.

The structure of the upper cover gripping mechanism 52 is substantially the same as that of the lower cover gripping mechanism 22, and the same points are not described in detail, except for the structure of the finger cylinder 226. As shown in fig. 11, the pneumatic fingers of the finger cylinder 226 in the upper cover grabbing mechanism 52 are adapted to the structure of the upper cover 93, only the pneumatic fingers 2262 for grabbing are provided, and the middle part is not provided with a positioning column.

As shown in fig. 6, the structure of the second pressing device 600 is the same as that of the first pressing device 300, and the second pressing device 600 is located behind the upper cover feeding device 500 and is configured to press and cover the upper cover 93 and the lower cover 91 placed in the previous step, thereby completing the assembly of the sensor 900.

As shown in fig. 12, the blanking device 700 includes a gantry 71, and the gantry 71 is spanned between the blanking station of the circular rail 11 and the discharging station of the tray conveyor 800. A seventh slide rail 72 is horizontally arranged on the door frame 71, a sixth support 73 is slidably mounted on the seventh slide rail 72, and a clamping piece 74 is vertically slidably mounted on the sixth support 73. The clamping piece 74 is used for clamping the assembled sensor 900, the clamping piece 74 can move up and down along the sixth support 73, and the sixth support 73 can horizontally move back and forth along the seventh slide rail 72, so that the sensor 900 can be grabbed, and the sensor 90 can be transferred to the discharging station of the tray conveying device 800.

As shown in fig. 13, the tray conveying device 800 includes a frame 82, the frame 82 is partially located below the gantry 71, a conveying motor 83 and a conveying belt 84 are provided on the frame 82, and the tray 81 is placed on the conveying belt 84. The conveyor motor 83 operates to drive the conveyor belt 84 to run, and the tray 81 is conveyed.

Wherein, the side of the material tray 81 is provided with a sensing part 811; two locators 75 are arranged on one side, close to the discharging station, of the door frame 71 of the blanking device 700, the locators 75 are matched with the sensing parts 811 and used for accurately positioning the material tray 81 on the discharging station, so that the clamping pieces 74 of the blanking device 700 can accurately place the sensor 900 on the material tray 81, and automatic blanking is achieved.

According to the assembling equipment of the sensor, the die holder 12 is arranged in the conveying device 100, the die holder 12 is matched with the lower cover body 91, the lower cover body 91 is sequentially placed on the die holder 12 through the lower cover feeding device 200, and the lower cover body 91 is pressed and limited in the die holder 12 through the first pressing device 300, so that the follow-up assembling operation is more accurate, and the precision is high; the film feeding device 400 is arranged to punch the film sheets and grab and place the film sheets 92 in the lower cover body 12, so that the film feeding device is accurate in cutting and installation, the problems of film damage and installation displacement are not easy to occur, and the product percent of pass is high; set up and cover loading attachment 500 and second closing device 600, the accuracy with the upper cover body 93 lid locate down on the lid 91 to compress tightly the lid with lid 91 down and close, the sensor 900 that the equipment was accomplished takes off through unloader 700, whole equipment process automation degree is high, need not manual operation, production speed is fast, the equipment accuracy is high, product percent of pass and product quality all improve.

As shown in fig. 14 and 15, the present invention also provides a sensor assembled by the above-mentioned assembling apparatus, including: a quadrilateral bridge circuit is formed by 4 resistance strain gauges; a voltage controlled oscillator circuit connected to the bridge circuit to output an oscillation frequency signal according to an output voltage of the bridge circuit; the amplitude limiter circuit is connected with the voltage-controlled oscillator circuit to prevent the oscillation frequency signal from being attenuated; the frequency discriminator circuit is connected with the amplitude limiter circuit to carry out frequency modulation-amplitude modulation and frequency modulation conversion on the oscillation frequency signal to obtain a voltage signal; and the amplifier circuit is connected with the frequency discriminator circuit to amplify and output the voltage signal.

It should be understood that the bridge circuit is a quadrilateral loop formed by four resistance strain gauges, each side of which is called a bridge arm; if the resistance value change trends of the adjacent resistance strain gauges of the four bridge arms are the same, the output voltage of the bridge circuit is 0; if the resistance value change trends of the adjacent resistance strain gauges are opposite, the bridge circuit outputs voltage; different output voltages correspond to different sensed pressures.

The voltage of the bridge circuit is output to the voltage-controlled oscillator circuit, the voltage-controlled oscillator circuit can output an oscillation frequency signal, the oscillation frequency signal reaches the frequency discriminator circuit through the amplitude limiter circuit, the frequency discriminator circuit converts the oscillation frequency signal into a voltage signal, and the voltage signal is amplified and output through the amplifier circuit. The sensor has high sensitivity and higher anti-interference capability.

The sensor further comprises a circuit board on which the bridge circuit and/or the voltage controlled oscillator circuit, the limiter circuit, the frequency discriminator circuit and the amplifier circuit may be integrated, the circuit board being arranged within the upper cover 93. It will be appreciated that the resistive strain gage is the thin film gage 92; the voltage-controlled oscillator circuit, the amplitude limiter circuit, the frequency discriminator circuit and the amplifier circuit can be selectively integrated on the circuit board according to the actual situation, such as the internal volume of the sensor, the rest circuit parts can be connected with the circuit board in the form of peripheral circuits to form a complete sensor circuit, and the peripheral circuits still belong to the sensor circuit; if the internal volume of the sensor is sufficiently large, the bridge circuit, the voltage controlled oscillator circuit, the limiter circuit, the frequency discriminator circuit and the amplifier circuit may all be integrated on a circuit board.

In the scheme, a resistor R1, a resistor R2, a resistor R3 and a resistor R4 form a quadrilateral loop, the common end of the resistor R1 and the resistor R3 and the common end of the resistor R2 and the resistor R4 are respectively connected with the negative electrode and the positive electrode of the power supply U1, and the common end of the resistor R1 and the resistor R2 and the common end of the resistor R3 and the resistor R4 are jointly used as voltage output ends. The resistor R1, the resistor R2, the resistor R3 and the resistor R4 are all resistance strain gauges, namely four bridge arms of the bridge circuit are all resistance strain gauges, resistance value drifting values caused by temperature changes are consistent and can be mutually offset, further, temperature self-compensation can be achieved, and the sensitivity of the sensor can be effectively improved.

In order to extend the frequency variable range, in an embodiment, the voltage-controlled oscillator circuit includes a resistor R5, a resistor R6, a resistor R7, a resistor R8, a varactor D1, a varactor D2, a varactor D3, a varactor D4, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, an inductor L1, an inductor L2, and a transistor V1;

the common end of the resistor R1 and the resistor R2 is connected with one end of a resistor R5, the other end of the resistor R5 is connected with the cathode of the varactor D1, the cathode of the varactor D2, the cathode of the varactor D3 and the cathode of the varactor D4, the anode of the varactor D3 and the anode of the varactor D4 are grounded, the anode of the varactor D4 and the anode of the varactor D4 are connected with one end of an inductor L4, the other end of the inductor L4 is connected with one end of a capacitor C4, the other end of the capacitor C4 is connected with one end of the capacitor C4, one end of the resistor R4 and the base of a transistor V4, the other end of the resistor R4 is grounded, the other end of the resistor R4 is connected with the collector of the transistor V4, one end of the capacitor C4 and the emitter 4, and the other end of the transistor V4 are connected with the Vcc 4, the other end of the capacitor C3 is grounded, the other end of the inductor L2 is connected to one end of the resistor R8, and the other end of the resistor R8 is grounded.

In order to prevent the oscillation frequency signal from being attenuated, in an embodiment, the limiter circuit comprises a PIN diode D5 and an inductor L3, the oscillation frequency signal output terminal is connected with the anode of the PIN diode D5 and one end of the inductor L3, the cathode of the PIN diode D5 is grounded, and the other end of the inductor L3 is grounded. This arrangement maintains the insertion loss of the entire circuit at a low level.

To improve sensitivity, in one embodiment, the discriminator circuit includes an inductor L4, an inductor L5, an inductor L6, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, a diode D6, a diode D7, a resistor R9, and a resistor R10;

one end of an inductor L4 is connected to an oscillation frequency signal output end, a common end of resistors R3 and R4 is connected to the other end of an inductor L4, inductors L4 are coupled to an inductor L5 and an inductor L6, one ends of inductors L5 are connected to one end of a capacitor C5 and one end of a diode D6, the other ends of diodes D6 are connected to one end of a resistor R9 and one end of a capacitor C7, one ends of inductors L7 are connected to one end of a capacitor C7 and one end of a diode D7, the other ends of diodes D7 are connected to one end of a resistor R7 and one end of a capacitor C7, the other ends of inductors L7 and C7 are connected to the other end of the inductor L7, the other end of the capacitor C7 and one end of the capacitor C7 serve as a common voltage output end. The setting has better frequency bandwidth, linear range and sensitivity.

In order to amplify the voltage signal for output, in one embodiment, the amplifier circuit includes a resistor R11, a resistor R12, a resistor R13, a resistor R14, and a transistor V2;

one end of a capacitor C7 is connected with one end of a resistor R11, the other end of the resistor R11 is connected with one end of a resistor R12 and the base of a triode V2, the other end of the resistor R12 is connected with one end of a resistor R13 and an external voltage end Vcc2, the collector of the triode V2 is connected with the other end of a resistor R13 and one end of the resistor R14, one end of a capacitor C8 is connected with the emitter of the triode V2 and the other end of the resistor R14 and is grounded, and the voltage U2 at two ends of the resistor R14 is output voltage. The output voltage signal is an electrical signal corresponding to the detected pressure.

Claims

1. The sensor assembling equipment is characterized by comprising a conveying device (100), a lower cover feeding device (200), a first pressing device (300), a film feeding device (400), an upper cover feeding device (500), a second pressing device (600) and a blanking device (700), wherein the lower cover feeding device (200), the first pressing device (300), the film feeding device (400), the upper cover feeding device (500), the second pressing device (600) and the blanking device (700) are matched with the conveying device (100) and are sequentially arranged along the running direction of the conveying device (100):

the conveying device (100) comprises an annular track (11) and a die holder (12) arranged on the annular track (11), and the die holder (12) runs along with the annular track (11);

the lower cover feeding device (200) comprises a lower cover conveying mechanism (21) and a lower cover grabbing mechanism (22), wherein the lower cover grabbing mechanism (22) is used for positioning and placing a lower cover body (91) on the lower cover conveying mechanism (21) in the die holder (12);

the first pressing device (300) is used for pressing and limiting the lower cover body (91) in the die holder (12);

the film feeding device (400) comprises a blanking mechanism and a film grabbing mechanism, wherein the blanking mechanism is used for punching a film sheet from a film belt, and the film grabbing mechanism is used for grabbing the film sheet into a lower cover body (91) tightly pressed in the die holder (12);

the upper cover feeding device (500) comprises an upper cover conveying mechanism (51) and an upper cover grabbing mechanism (52), wherein the upper cover grabbing mechanism (52) is used for positioning an upper cover body (93) on the upper cover conveying mechanism (51) on the lower cover body (91) on which the thin film sheet (92) is placed;

the second pressing device (600) is used for pressing and covering the upper cover body (93) and the lower cover body (91);

the blanking device (700) is used for removing the assembled sensor (900) on the conveying device (100).

2. The assembly device of a sensor according to claim 1, wherein the lower cover gripping mechanism (22) and the upper cover gripping mechanism (52) each comprise:

a first bracket (221);

a first slide rail (222) mounted on the first bracket (221) in a horizontal direction;

a first support (223) slidably mounted on the first slide rail (222);

the first air cylinder (224) is arranged on the first support (221), is connected with the first support (223) and is used for driving the first support (223) to reciprocate along the first sliding rail (222);

a second slide rail (225) mounted on the first support (223) in a vertical direction;

the finger cylinder (226) is slidably mounted on the second slide rail (225) and is used for grabbing the lower cover body (91)/the upper cover body (93);

and the second air cylinder (227) is arranged on the first support (223), is connected with the finger air cylinder (226) and is used for driving the finger air cylinder (226) to reciprocate along the second sliding rail (225).

3. The assembly apparatus of the sensor according to claim 2, wherein the finger cylinder (226) in the lower cover gripping mechanism (22) is provided with a positioning column (2261), the positioning column (2261) is located in the middle of a plurality of pneumatic clamping fingers (2262) and is adapted to the inner cavity of the lower cover (91).

4. The assembly device of a sensor according to claim 1, characterized in that said first pressing means (300) and said second pressing means (600) are structurally identical and each comprise:

a second bracket (31);

the third sliding rail (32) is vertically arranged on the second bracket (31);

the second support (33) is arranged on the third slide rail (32) in a sliding way;

the third air cylinder (34) is arranged on the second support (31), is connected with the second support (33) and is used for driving the second support (33) to reciprocate along the third sliding rail (32);

and the abutting part (35) is arranged on the second support (33) and is used for contacting with the part to be pressed to realize downward pressing.

5. The assembly device of a sensor according to claim 4, characterized in that said abutment (35) comprises:

the third support seat (351) is connected with the second support seat (33) and moves along with the second support seat (33), and an elastic mounting hole with an opening at the lower part is formed in the third support seat (351);

the elastic rod (352) penetrates through the elastic mounting hole from bottom to top and can move up and down along the elastic mounting hole;

and the sensor (353) is arranged at the upper part of the elastic force mounting hole and is used for detecting a contact signal or a pressure signal from the elastic force rod (352).

6. The assembly apparatus of a sensor of claim 1, wherein the blanking mechanism comprises: a die plate (41) provided with a blanking film hole (411);

a film strip conveying roller group, which is used for conveying a film strip (920) to enable the film strip (920) to pass through the lower part of the template (41) in a tensioning way;

blanking cylinder (42), locate template (41) and film area (920) below, the output of blanking cylinder (42) is equipped with blanking membrane head (421), blanking cylinder (42) operation drive blanking membrane head (421) pass blanking membrane hole (411), realize the blanking to film area (920) to film piece (92) top under will blanking extremely template (41) top.

7. The assembly apparatus of a sensor according to claim 6, wherein the set of film belt conveying rollers comprises a pair of stepping rollers (43), the pair of stepping rollers (43) comprising a drive roller (431) and a driven roller (432) disposed one above the other:

the driving roller (431) is horizontally arranged behind the template (41) and is connected with a stepping motor (433);

the driven roller (432) is parallel to the driving roller (431) and is installed on the ground through a fourth air cylinder (434), and the fourth air cylinder (434) operates to adjust the distance between the driven roller (432) and the driving roller (431).

8. The assembly apparatus of a sensor according to claim 6 or 7, wherein the diaphragm gripping mechanism comprises:

a third bracket (44);

a fourth slide rail (441) disposed on the third bracket (44) along the horizontal X-direction;

a fourth support (45) slidably mounted on the fourth slide rail (441);

the fifth air cylinder (442) is arranged on the third bracket (44), is connected with the fourth support (45) and is used for driving the fourth support (45) to reciprocate along the fourth sliding rail (441);

a fifth slide rail (451) arranged on the fourth support (45) along the vertical Y direction;

a fifth support (46) slidably mounted on the fifth slide rail (451);

the sixth air cylinder (452) is mounted on the fourth support (45), connected with the fifth support (46) and used for driving the fifth support (46) to reciprocate along the fifth sliding rail (451);

a sixth slide rail (461) disposed on the fifth support (46) along the horizontal Z-direction;

the film grabbing head (47) is slidably mounted on the sixth sliding rail (461);

the seventh air cylinder (462) is arranged on the fifth support (46), is connected with the film grabbing head (47) and is used for driving the film grabbing head (47) to reciprocate along the sixth sliding rail (461);

the film grabbing head (47) is used for grabbing the film sheet (92) on the template (41) into the lower cover body (91) on the die holder (12).

9. The assembly apparatus of the sensor according to claim 8, wherein the gripping film head (47) comprises two, the number of the blanking film holes (411) is 4, and the gripping film head (47) moves in the Z direction to correspond to 1, 3 or 2, 4 of the 4 blanking film holes (411), respectively.

10. The sensor assembled by the assembling device of any one of claims 1 to 9, comprising:

a quadrilateral bridge circuit is formed by 4 resistance strain gauges;

a limiter circuit connected to the voltage controlled oscillator circuit to prevent attenuation of the oscillation frequency signal; the frequency discriminator circuit is connected with the amplitude limiter circuit so as to carry out frequency modulation-amplitude modulation and frequency modulation conversion on the oscillation frequency signal to obtain a voltage signal;