Automatic nondestructive feeding disc for detection and sorting

Abstract

The utility model belongs to the technical field of feeding equipment, and particularly relates to a detecting and sorting automatic lossless feeding disc which comprises a machine frame, a first sorting deflector rod, a second sorting deflector rod, a feeding disc body and a discharging detecting device, and the feeding disc body and the discharging detecting device are both installed on the machine frame. The first sorting deflector rod and the second sorting deflector rod are both fixedly installed on the inner side wall of the feeding disc, one end of the first sorting deflector rod and one end of the second sorting deflector rod both extend to the position above a feeding path of the feeding disc, and the first sorting deflector rod and the second sorting deflector rod are sequentially arranged in a spaced mode along the feeding path of the feeding disc. The length of the first sorting deflector rod is smaller than that of the second sorting deflector rod, the discharging detection device is adjacent to the discharging side of the feeding disc, a detection hole is formed in the position, close to a discharging port, of the side face of the feeding disc, and one end of an air blowing pipe of the discharging detection device extends into the detection hole and is used for blowing off products which do not meet the standard. Products in conveying can be adjusted and screened.

Description

Technical Field

[0001] The utility model belongs to the technical field of feeding equipment, and in particular relates to an automatic non-destructive feeding tray for detection and sorting. Background Art

[0002] A vibration plate is an auxiliary feeding device for automatic assembly or automatic processing machinery. It can arrange various products in an orderly manner, cooperate with automatic assembly equipment to assemble various parts of the product into a complete product, or cooperate with automatic processing machinery to complete the processing of workpieces, especially in the production of motor cores (magnetic steel sheets, magnetic tiles), ceramic thermistors, quartz glass sheets, ceramic chips, special coated metal parts and other vulnerable accessories. The vibration plate is used to automatically arrange the above-mentioned motor cores (magnetic steel sheets, magnetic tiles), ceramic thermistors, quartz glass sheets, ceramic chips, special coated metal parts and other vulnerable accessories in an orderly manner and then transport them. In the existing technology, motor cores (magnetic steel sheets, magnetic tiles), ceramic thermistors, quartz glass sheets, ceramic chips, special coated metal parts and other related accessories are sorted and transported through a continuous conveying track, but the technical problem of not being able to sort the products can be achieved during the vibration plate feeding process in the existing technology. Utility Model Content

[0003] The purpose of the utility model is to provide an automatic non-destructive feeding tray for detection and sorting, aiming to solve the technical problem of the single feeding function of the vibration tray in the prior art.

[0004] To achieve the above-mentioned objectives, an embodiment of the present invention provides an automatic non-destructive feeding tray for detection and sorting, comprising a frame, a first material selection lever, a second material selection lever, a feeding tray and a discharging detection device, wherein the feeding tray and the discharging detection device are both mounted on the frame, the first material selection lever and the second material selection lever are both fixedly mounted on the inner side wall of the feeding tray, and one end of the first material selection lever and the second material selection lever extend above the feeding path of the feeding tray, the first material selection lever and the second material selection lever are arranged in sequence at intervals along the feeding path of the feeding tray, and the length of the first material selection lever is shorter than the length of the second material selection lever, the discharging detection device is arranged adjacent to the discharging side of the feeding tray, and a detection hole is opened on the side of the feeding tray near the discharging port, and one end of the blowing pipe of the discharging detection device extends into the detection hole for blowing off products that do not meet the standards.

[0005] Preferably, a sensing device is provided on the frame, and a sensing end of the sensing device is located above the feeding tray.

[0006] Preferably, the discharge detection device further includes a mounting frame and a visual detection device, the mounting frame is fixedly mounted on the frame, the visual detection device is fixedly mounted on the mounting frame, and the visual detection device is arranged toward the detection hole.

[0007] Preferably, the feeding plate includes a vibration plate, a recycled rubber pad, a first feeding rubber pad, a second feeding rubber pad, a third feeding rubber pad and a discharge rubber pad, the recycled rubber pad, the first feeding rubber pad, the second feeding rubber pad, the third feeding rubber pad and the discharge rubber pad are all arranged in the vibration plate, and the recycled rubber pad, the first feeding rubber pad, the second feeding rubber pad, the third feeding rubber pad and the discharge rubber pad are spirally connected in sequence, and one end of the discharge rubber pad extends toward the discharge port.

[0008] Preferably, the vibration plate includes a first sub-plate and a second sub-plate, the recycled rubber pad and the discharge rubber pad are both arranged on the first sub-plate, the second feed rubber pad is arranged on the second sub-plate, the first feed rubber pad and the third feed rubber pad are both arranged across the first sub-plate and the second sub-plate, the two ends of the first feed rubber pad are respectively connected to the output end of the recycled rubber pad and the input end of the second feed rubber pad, and the two ends of the third feed rubber pad are respectively connected to the output end of the second feed rubber pad and the input end of the discharge rubber pad.

[0009] Preferably, a discharging device is provided on the first sub-plate, one end of the discharging device extends outward through the discharging port, and one end of the discharging rubber pad extends into the discharging device.

[0010] Preferably, the discharging device includes a discharging plate, a height limiting plate and a guide block, the discharging plate is provided with a discharging trough, one end of the discharging rubber pad extends into the discharging trough, the height limiting plate is fixedly mounted on the discharging plate, and one side edge of the height limiting plate extends to above the discharging trough, the guide block is fixedly arranged on the discharging plate, and the guide block is located at the feed port of the discharging trough.

[0011] Preferably, the guide block is provided with an inclined side surface, and the inclined side surface is inclined from the feed port of the discharge chute toward the other end gradually away from the discharge rubber pad.

[0012] Preferably, a feed slope is provided on a side of the guide block facing the feed rubber pad, and the feed slope is gradually inclined toward the feed rubber pad along the conveying direction.

[0013] Preferably, it also includes a feeding device, which is fixedly mounted on the frame, and the feeding device is arranged adjacent to the feed tray, and the discharge end of the feeding device extends to a position above the feed tray near the center, and the feeding device is arranged opposite to the discharge detection device.

[0014] The above one or more technical solutions in the detection and sorting automatic non-destructive feeding tray provided by the embodiment of the utility model have at least one of the following technical effects:

[0015] The utility model discloses an automatic non-destructive feeding tray for detecting and sorting, which is assembled from a frame, a first material selection lever, a second material selection lever, a feeding tray and a discharge detection device, wherein the first material selection lever and the second material selection lever are both fixedly mounted on the feeding tray, and the first material selection lever and the second material selection lever are both located on the feeding path of the feeding tray, and the product is placed in a position slightly in the center of the feeding tray, and is moved along a spiral path in the feeding tray to the discharge port position for output, and one end of the first material selection lever and the second material selection lever are fixedly mounted on the inner side wall of the feeding tray, and the other end are extended to the feeding path, and the first material selection lever is located in front of the second material selection lever, wherein the length of the first material selection lever is shorter than that of the second material selection lever, and the product on the conveying path is firstly The conveying direction of the product is guided so that the product is closer to the edge of the conveying path near the center of the feed tray, and then the product passes through the second material selection lever, which knocks the product down and conveys it according to the required placement state. The products that do not meet the standard placement state will move toward the edge under the guidance of the second material selection lever and fall into the waiting area of the feed tray to repeat the conveying cycle. The products that meet the requirements continue to be arranged and moved one by one under the conveyance of the feed tray, and pass through the detection hole opened on the side of the feed tray before output. The discharge detection device detects the products, and the substandard products are blown to the waiting area through the air pipe of the discharge detection device to realize the screening of the output products. Through the above structural arrangement, the products on the feed tray can be adjusted and screened. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0017] Figure 1 This is a rendering of an automatic non-destructive feeding tray for detection and sorting provided by an embodiment of the utility model.

[0018] Figure 2 This is a rendering of a feeding tray for detecting and sorting an automatic non-destructive feeding tray provided in an embodiment of the utility model.

[0019] Among them, the reference numerals in the figures are:

[0020] 10—Frame 11—Induction device 20—First material selection lever

[0021] 30 - Second material selection lever 4 - Feeding tray 40 - Vibrating plate

[0022] 41 - first sub-plate 42 - second sub-plate 50 - discharge detection device

[0023] 51 - air blowing pipe 52 - visual inspection device 53 - mounting frame

[0024] 60—feeding device 70—discharging device 71—discharging plate

[0025] 72—height limit plate 73—guide block 411—recycled rubber pad

[0026] 412 - discharge rubber pad 413 - first feed rubber pad 421 - second feed rubber pad

[0027] 422—Third feeding rubber pad. DETAILED DESCRIPTION

[0028] The following describes the embodiments of the present invention in detail. Figures 1-2 , wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the embodiments of the present invention, and should not be understood as limiting the present invention.

[0029] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0031] In the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium; internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0032] In one embodiment of the present invention, Figures 1-2 As shown, an automatic non-destructive feeding tray for detection and sorting is provided, including a frame 10, a first material selection lever 20, a second material selection lever 30, a feeding tray 4 and a discharge detection device 50, the first material selection lever 20 and the second material selection lever 30 are used to adjust the products being conveyed, wherein a convex strip can be provided at the bottom of the second material selection lever 30, and the convex strip is provided close to a side of the second material selection lever 30 facing away from the feeding direction, and a stepped groove surface is formed with the side facing the feeding direction and the bottom surface of the second material selection lever 30, and the product is hit by the protruding part of the second material selection lever 30 and conveyed from under the convex strip, and the feeding tray 4 and the discharge detection device 50 are both mounted on the frame 10, and the first material selection lever 20 and the second material selection lever 30 are both fixedly mounted on the inner side wall of the feeding tray 4, and one end of the first material selection lever 20 and the second material selection lever 30 are both extended to above the feeding path of the feeding tray 4, and the first material selection lever 20 and the second material selection lever 30 The material selection rods 30 are all inclined from the connection end with the feed tray 4 along the feeding direction toward the center of the feed tray 4. Through the inclined direction, the products in conveyance can be guided in one direction. The first material selection rod 20 and the second material selection rod 30 are arranged in sequence along the feeding path of the feed tray 4, and the length of the first material selection rod 20 is shorter than the length of the second material selection rod 30. The first material selection rod 20 makes a preliminary angle adjustment to the product in conveyance and guides the product to approach the edge of the conveying path, and then continues to convey after adjustment by the second material selection rod 30 or returns to the waiting area of the feed tray 4 along the inclined angle of the second material selection rod 30 for circular conveying. The discharge detection device 50 is adjacent to the discharge side of the feed tray 4, and a detection hole is opened on the side of the feed tray 4 near the discharge port. One end of the blowing pipe 51 of the discharge detection device 50 extends to the detection hole to blow off products that do not meet the standards.

[0033] An automatic non-destructive feeding tray 4 for detection and sorting in the present invention is assembled by a frame 10, a first material selection lever 20, a second material selection lever 30, a feeding tray 4 and a discharge detection device 50, wherein the first material selection lever 20 and the second material selection lever 30 are both fixedly mounted on the feeding tray 4, and the first material selection lever 20 and the second material selection lever 30 are both located on the feeding path of the feeding tray 4, and the product is placed on a position in the center of the feeding tray 4, and is moved along a spiral path in the feeding tray 4 to the discharge port position for output, and one end of the first material selection lever 20 and the second material selection lever 30 are fixedly mounted on the inner side wall of the feeding tray 4, and the other end extends to the feeding path, and the first material selection lever 20 is located in front of the second material selection lever 30, wherein the length of the first material selection lever 20 is shorter than that of the second material selection lever 30, First, the conveying direction of the products on the conveying path is guided so that the products are closer to the edge of the conveying path near the center of the feed tray 4, and then the products pass through the second material selection lever 30, and the second material selection lever 30 knocks the products down and conveys them according to the required placement state. Products that do not meet the standard placement state will move toward the edge under the guidance of the second material selection lever 30 and fall into the waiting area of the feed tray 4 to repeat the conveying cycle. Products that meet the requirements continue to be arranged and moved one by one under the conveyance of the feed tray 4, and before being output, they pass through the detection hole opened on the side of the feed tray 4, and the discharge detection device 50 detects the products. For products that do not meet the standards, they are blown to the waiting area through the blowing pipe 51 of the discharge detection device 50, so as to realize the screening of the output products. Through the above-mentioned structural arrangement, the products on the feed tray 4 can be adjusted and screened.

[0034] In another embodiment of the present invention, Figure 1 As shown, a sensing device 11 is provided on the frame 10, and the sensing end of the sensing device 11 is located above the feed tray 4, and the sensing position of the sensing device 11 is located behind the second material selection lever 30, for sensing whether there are more products to continue to be conveyed, so as to control the feeding in a linked manner.

[0035] In another embodiment of the present invention, Figure 1 As shown, the discharge detection device 50 also includes a mounting frame 53 and a visual detection device 52. The mounting frame 53 is fixedly mounted on the frame 10, and the visual detection device 52 is fixedly mounted on the mounting frame 53. The visual detection device 52 is arranged toward the detection hole. The visual detection device 52 detects the products passing through the detection hole, and then blows the substandard products away from the discharge path through the air pipe 51.

[0036] In another embodiment of the present invention, Figures 1-2As shown, the feeding tray 4 includes a vibration tray 40, a recycling rubber pad 411, a first feeding rubber pad 413, a second feeding rubber pad 421, a third feeding rubber pad 422 and a discharging rubber pad 412. The upper surfaces of the recycling rubber pad 411, the first feeding rubber pad 413, the second feeding rubber pad 421, the third feeding rubber pad 422 and the discharging rubber pad 412 are arranged in a matrix with a plurality of inclined rubber columns, and each rubber column is inclined from bottom to top along the direction of the feeding path. The recycling rubber pad 411 is used to temporarily store the product and gradually output the product. The first feeding rubber pad 413, the second feeding rubber pad 421 and the third feeding rubber pad 422 are used to transfer the product. The discharging rubber pad 412 is used to output the product. The feed rubber pad 413, the second feed rubber pad 421, the third feed rubber pad 422 and the discharge rubber pad 412 are all arranged in the vibration disk 40, and the return rubber pad 411, the first feed rubber pad 413, the second feed rubber pad 421, the third feed rubber pad 422 and the discharge rubber pad 412 are spirally connected in sequence, one end of the discharge rubber pad 412 extends toward the discharge port, the first feed rubber pad 413 and the third feed rubber pad 422 perform steering and conveying processing on the product being conveyed, the first feed rubber pad 413 is connected to the return rubber pad 411 and the second feed rubber pad 421 to realize the conveying and transfer of the product, the third feed rubber pad 422 is connected to the second feed rubber pad 421 and the discharge rubber pad 412 to realize the transfer and discharge of the product.

[0037] In another embodiment of the present invention, Figures 1-2 As shown, the vibration plate 40 includes a first sub-plate 41 and a second sub-plate 42. A vibration motor is provided under the first sub-plate 41 and the second sub-plate 42, and the vibration directions of the two vibration motors are set in opposite directions to each other, for guiding the movement of products on the first sub-plate 41 and the second sub-plate 42 respectively. The first material selection lever 20 and the second material selection lever 30 are both located above the second feeding rubber pad 421, for adjusting the products conveyed after the preliminary arrangement. The return rubber pad 411 and the discharge rubber pad 412 are both provided on the first sub-plate 41, the second feeding rubber pad 421 is provided on the second sub-plate 42, and the first feeding rubber pad 413 and the third feeding rubber pad 414 are provided on the first sub-plate 41. The rubber pads 422 are arranged across the first sub-plate 41 and the second sub-plate 42 to achieve the connection between the first sub-plate 41 and the second sub-plate 42. The two ends of the first feeding rubber pad 413 are respectively connected to the output end of the recycling rubber pad 411 and the input end of the second feeding rubber pad 421, and are used to divert and move the products conveyed on the recycling rubber pad 411 to the second feeding rubber pad 421. The two ends of the third feeding rubber pad 422 are respectively connected to the output end of the second feeding rubber pad 421 and the input end of the discharge rubber pad 412, and are used to transfer the adjusted product arrangement on the second feeding rubber pad 421 to the discharge rubber pad 412 for preparation for output.

[0038] The first feeding rubber pad 413 and the third feeding rubber pad 422 are both divided into two sections, one section is installed on the first sub-disc 41, and the other section is installed on the second sub-disc 42. The two sections of the first feeding rubber pad 413 are respectively connected to the output end of the return rubber pad 411 and the input end of the second feeding rubber pad 421, and the two sections of the third feeding rubber pad 422 are respectively connected to the output end of the second feeding rubber pad 421 and the input end of the discharge rubber pad 412.

[0039] In another embodiment of the present invention, Figures 1-2 As shown, a discharge device 70 is provided on the first sub-plate 41 , one end of the discharge device 70 extends outward through the discharge port, one end of the discharge rubber pad 412 extends into the discharge device 70 , and the discharge device 70 extends to output the product to the feed plate 4 .

[0040] In another embodiment of the present invention, Figures 1-2 As shown, the discharging device 70 includes a discharging plate 71, a height limiting plate 72 and a guide block 73. A discharging trough is provided on the discharging plate 71, and the products are moved and discharged one by one from the discharging trough. The guide block 73 is used to convey and guide the products to be discharged to ensure smooth discharging movement. One end of the discharging rubber pad 412 extends into the discharging trough, and the height limiting plate 72 is fixedly mounted on the discharging plate 71, and one side edge of the height limiting plate 72 extends to the top of the discharging trough, covering the top of the discharging trough, ensuring stable movement and discharge of the products. The guide block 73 is fixedly set on the discharging plate 71, and the guide block 73 is located at the feed port of the discharging trough, and the regularly moved products are placed so that the products can smoothly enter the discharging trough.

[0041] In another embodiment of the present invention, Figures 1-2 As shown, the guide block 73 is provided with an inclined side surface, which is inclined from the feed port of the discharge trough toward the other end gradually away from the discharge rubber pad 412. The inclined surface setting can effectively avoid direct collision between the product and the guide block 73, affecting the output effect.

[0042] In another embodiment of the present invention, Figures 1-2 As shown, a return material slope is provided on the side of the guide block 73 facing the return material rubber pad 411, and the return material slope is gradually inclined toward the return material rubber pad 411 along the conveying direction. When a product that does not meet the standards is detected, the air pipe 51 blows the product off to prevent the product from continuing to move and colliding with the guide block 73, thereby affecting the screening effect.

[0043] In another embodiment of the present invention, Figure 1As shown, it also includes a feeding device 60, which is associated with the sensing device 11. It determines whether feeding is needed based on the perception of the product conveyed on the feeding tray 4 by the sensing device 11. The feeding device 60 is fixedly installed on the frame 10, and the feeding device 60 is arranged adjacent to the feeding tray 4, and the discharging end of the feeding device 60 extends to a position above the feeding tray 4 near the center, and the feeding device 60 is arranged opposite to the discharging detection device 50. The product that falls on the second feeding rubber pad 421 follows the conveying path and continues to be conveyed under the action of the first material selection lever 20 and the second material selection lever 30, or falls into the return rubber pad 411 area to realize feeding movement.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An automatic non-destructive feeding tray for detection and sorting, characterized by: The loader is provided with a first material selection lever, a second material selection lever, a feeding tray and a discharging detection device, wherein the feeding tray and the discharging detection device are both mounted on the frame, the first material selection lever and the second material selection lever are both fixedly mounted on the inner side wall of the feeding tray, and one end of the first material selection lever and the second material selection lever extend above the feeding path of the feeding tray, the first material selection lever and the second material selection lever are arranged in sequence along the feeding path of the feeding tray, and the length of the first material selection lever is shorter than that of the second material selection lever, the discharging detection device is arranged adjacent to the discharging side of the feeding tray, and a detection hole is provided on the side of the feeding tray near the discharging port, and one end of the blowing pipe of the discharging detection device extends into the detection hole for blowing off products that do not meet the standards.

2. The automatic non-destructive feeding tray for detection and sorting according to claim 1, characterized in that: The frame is provided with a sensing device, and the sensing end of the sensing device is located above the feeding tray.

3. The automatic non-destructive feeding tray for detection and sorting according to claim 1, characterized in that: The discharging detection device further includes a mounting frame and a visual detection device. The mounting frame is fixedly mounted on the machine frame, the visual detection device is fixedly mounted on the mounting frame, and the visual detection device is arranged toward the detection hole.

4. The automatic non-destructive feeding tray for detection and sorting according to claim 1, characterized in that: The feeding plate includes a vibration plate, a recycled rubber pad, a first feeding rubber pad, a second feeding rubber pad, a third feeding rubber pad and a discharge rubber pad. The recycled rubber pad, the first feeding rubber pad, the second feeding rubber pad, the third feeding rubber pad and the discharge rubber pad are all arranged in the vibration plate, and the recycled rubber pad, the first feeding rubber pad, the second feeding rubber pad, the third feeding rubber pad and the discharge rubber pad are spirally connected in sequence, and one end of the discharge rubber pad extends toward the discharge port.

5. The automatic non-destructive feeding tray for detection and sorting according to claim 4, characterized in that: The vibration plate includes a first sub-plate and a second sub-plate, the recycled rubber pad and the discharge rubber pad are both arranged on the first sub-plate, the second feed rubber pad is arranged on the second sub-plate, the first feed rubber pad and the third feed rubber pad are both arranged across the first sub-plate and the second sub-plate, the two ends of the first feed rubber pad are respectively connected to the output end of the recycled rubber pad and the input end of the second feed rubber pad, and the two ends of the third feed rubber pad are respectively connected to the output end of the second feed rubber pad and the input end of the discharge rubber pad.

6. The automatic non-destructive feeding tray for detection and sorting according to claim 5, characterized in that: A discharging device is provided on the first sub-plate, one end of the discharging device extends outward through the discharging port, and one end of the discharging rubber pad extends into the discharging device.

7. The automatic non-destructive feeding tray for detection and sorting according to claim 6, characterized in that: The discharging device includes a discharging plate, a height limiting plate and a guide block. A discharging trough is provided on the discharging plate. One end of the discharging rubber pad extends into the discharging trough. The height limiting plate is fixedly installed on the discharging plate, and one side edge of the height limiting plate extends to the top of the discharging trough. The guide block is fixedly provided on the discharging plate, and the guide block is located at the feed port of the discharging trough.

8. The automatic non-destructive feeding tray for detection and sorting according to claim 7, characterized in that: The guide block is provided with an inclined side surface, and the inclined side surface is inclined from the feed port of the discharge trough toward the other end and gradually away from the discharge rubber pad.

9. The automatic non-destructive feeding tray for detection and sorting according to claim 8, characterized in that: A feed slope is provided on one side of the guide block facing the feed rubber pad, and the feed slope is gradually inclined toward the feed rubber pad along the conveying direction.

10. The automatic non-destructive feeding tray for detection and sorting according to claim 1, characterized in that: It also includes a feeding device, which is fixedly mounted on the frame, and is arranged adjacent to the feed tray, and the discharge end of the feeding device extends to a position above the feed tray near the center, and the feeding device is arranged opposite to the discharge detection device.

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