Material cylinder material shortage detection sensor
By attaching a capacitor plate to the outer wall of the material barrel and using the change in capacitance value to detect the material height, the problem of inaccurate detection by optical sensors in dust and toner contaminated environments is solved, and accurate material shortage alarm is achieved in high temperature environments.
Patent Information
- Application Number
- CN202423047465.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-10
- Publication Date
- 2025-09-30
- Estimated Expiration
- 2034-12-10
AI Technical Summary
Existing optical sensors cannot accurately detect the material height in the drying cylinder in an environment with dust accumulation and toner pollution, and infrared radiation interference affects the detection effect.
A capacitor plate is attached to the glass window plate on the outer wall of the material barrel. The material height is determined by detecting changes in capacitance value, thus realizing a material shortage alarm.
It solves the problem of light path obstruction caused by dust and toner pollution, has a wider range of applications, is not affected by infrared radiation, and can accurately detect material height.
Smart Images
Figure CN223400446U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sensors, in particular to a material barrel shortage detection sensor. Background Art
[0002] Injection molding workshops require heated drying of injection molding materials. Automated production requires monitoring the material level within the drying drum. Currently, optical sensors are used to detect the presence of material within the drying drum. However, due to the inherent dustiness of the materials themselves, and the addition of colorants to some plastic granules, dust accumulates and contaminates the observation window on the drum wall, making it impossible to accurately detect the presence of material within the drum.
[0003] The existing technology has the following application defects:
[0004] 1. Optical sensors need to ensure that the light path for detection is unobstructed. Dust accumulation and color powder pollution of the material itself will block the sensor's detection light path, causing the optical sensor product to lose its function and is not suitable for environments where dust is easily accumulated.
[0005] 2. The temperature inside the barrel usually reaches 120°C, and the infrared radiation of the material may also interfere with the function of the optical sensor. Utility Model Content
[0006] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a material barrel lack detection sensor.
[0007] In order to achieve the above purpose, the present invention adopts the following technical solutions:
[0008] A material barrel out-of-material detection sensor is designed, which includes a sensor housing and a capacitor plate housing. A sensor PCBA is arranged in the inner cavity of the sensor housing, the sensor PCBA is connected to a signal line, a sensor cover is arranged on the top of the sensor housing, and connecting ears are arranged on the side walls of the sensor housing. A mounting groove is provided on the capacitor plate housing, a capacitor PCB is arranged in the inner cavity of the mounting groove, capacitor plate mounting brackets are arranged on both sides of the capacitor PCB, screws are threaded on the connecting ears, the screws pass through the capacitor plate mounting brackets and are threadedly connected to the capacitor plate housing, and the capacitor plate housing is attached to the outer wall of the glass window plate on the outer wall of the material barrel.
[0009] Preferably, the side wall of the sensor housing is provided with an indicator light hole and a switch hole, and the sensor PCBA is provided with an indicator light, a power indicator light and a switch, the indicator light and the power indicator light extend out of the indicator light hole and the switch hole, and the switch extends out of the switch hole.
[0010] Preferably, the outer wall of the material barrel is fastened to a pair of mounting plates by screws, a pair of sliders are provided on the side walls of the capacitor plate housing, and the capacitor plate housing is slidably arranged between the pair of mounting plates through the sliders.
[0011] The utility model proposes a material drum shortage detection sensor, which has the beneficial effects of: adopting a design structure of a capacitor plate attached to the drum window, the capacitance value will change as the material height in the drying drum changes. The material height change is judged by comparing the change in capacitance, thereby realizing the sensor alarm function, improving the problem of optical sensors that the sensor detection light path is blocked by dust accumulation and toner contamination, and at the same time, it is not affected by infrared radiation and has a wider range of applications. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 This is an isometric view of a material barrel lack detection sensor proposed by the present invention;
[0013] Figure 2 This is a front view of a material barrel lack detection sensor proposed by the utility model;
[0014] Figure 3 This is a top view of a material barrel lack detection sensor proposed by the utility model;
[0015] Figure 4 This is a schematic diagram of the sensor PCBA structure of a material barrel lack detection sensor proposed in the utility model;
[0016] Figure 5 This is an exploded view of the sensor PCBA of a material barrel lack detection sensor proposed in this utility model.
[0017] In the figure: 1 sensor cover, indicator light 101, power indicator light 102, switch 103, 2 signal line, 3 screws, 4 sensor PCBA, 5 sensor housing, 6 capacitor board mounting bracket, 7 capacitor PCB, 8 capacitor board housing, 9 mounting plate, 10 glass window plate, 11 mounting slot, 12 material barrel. DETAILED DESCRIPTION
[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.
[0019] Reference Figure 1 、 45. A material barrel shortage detection sensor includes a sensor housing 5 and a capacitor plate housing 8. A sensor PCBA4 is arranged in the inner cavity of the sensor housing 5. The sensor PCBA4 is connected to the signal line 2. A sensor cover 1 is arranged on the top of the sensor housing 5. A connecting ear is arranged on the side wall of the sensor housing 5. A mounting groove 11 is provided on the capacitor plate housing 8. A capacitor PCB7 is arranged in the inner cavity of the mounting groove 11. When the material height in the barrel changes, its capacitance value will change. The change in material height is judged by comparing the change in its capacitance. The sensor is placed close to the barrel observation window and the alarm capacitance value is set. When the material height of the material barrel 12 changes, its capacitance value also changes accordingly, thereby realizing the sensor alarm function. Capacitor plate mounting brackets 6 are arranged on both sides of the capacitor PCB7. Screws 3 are threaded on the connecting ear. The screws 3 pass through the capacitor plate mounting bracket 6 and are threadedly connected to the capacitor plate housing 8. The capacitor plate housing 8 is attached to the outer wall of the glass window plate 10 on the outer wall of the material barrel 12.
[0020] Reference Figure 4 、 5 The side wall of the sensor housing 5 is provided with an indicator light hole and a switch hole. An indicator light 101, a power indicator light 102 and a switch 103 are provided on the sensor PCBA4. The indicator light 101 and the power indicator light 102 extend outside the indicator light hole and the switch hole, and the switch 103 extends outside the switch hole. The outer wall of the material barrel 12 is fastened to a pair of mounting plates 9 by screws. A pair of sliders are provided on the side wall of the capacitor plate housing 8. The capacitor plate housing 8 is slidably set between the pair of mounting plates 9 through the sliders. The sliding installation method is adopted to facilitate the adjustment of the height of the capacitor plate housing 8 to fit the glass window plate 10.
[0021] Working mode: The flashlight PCB of the sensor PCBA4 is attached to the glass window plate 10 of the material barrel, and the capacitor PCB7 detects that the material height in the barrel is at the alarm line position. Confirm that the power indicator light 102 is on, press the switch 103, the indicator light 102 flashes three times and then goes out, indicating that the alarm line position calibration is completed. New material is loaded in the barrel. When the material height in the barrel drops to the alarm line, the indicator light 102 flashes and the signal line outputs an alarm signal to the external terminal device, realizing the material shortage detection function.
[0022] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A material barrel shortage detection sensor, comprising a sensor housing (5) and a capacitor plate housing (8), wherein a sensor PCBA (4) is disposed in an inner cavity of the sensor housing (5), and the sensor PCBA (4) is connected to a signal line (2), and is characterized in that: A sensor cover (1) is provided on the top of the sensor housing (5), a connecting ear is provided on the side wall of the sensor housing (5), a mounting groove (11) is provided on the capacitor plate housing (8), a capacitor PCB (7) is provided in the inner cavity of the mounting groove (11), capacitor plate mounting brackets (6) are provided on both sides of the capacitor PCB (7), a screw (3) is threaded on the connecting ear, the screw (3) passes through the capacitor plate mounting bracket (6) and is threadedly connected to the capacitor plate housing (8), and the capacitor plate housing (8) is attached to the outer wall of the glass window plate (10) on the outer wall of the material barrel (12).
2. The material barrel lack detection sensor according to claim 1, characterized in that: The side wall of the sensor housing (5) is provided with an indicator light hole and a switch hole. The sensor PCBA (4) is provided with an indicator light (101), a power indicator light (102) and a switch (103). The indicator light (101) and the power indicator light (102) extend out of the indicator light hole and the switch hole, and the switch (103) extends out of the switch hole.
3. The material barrel lack detection sensor according to claim 1, characterized in that: The outer wall of the material barrel (12) is fastened to a pair of mounting plates (9) by screws, a pair of sliders are provided on the side walls of the capacitor plate housing (8), and the capacitor plate housing (8) is slidably provided between the pair of mounting plates (9) via the sliders.