Sensor for measuring surface density of sheet

Abstract

A surface density measuring sensor for sheets relates to the field of surface density sensors and comprises a ray light source emitter, a ray receiver and an outer protective shell, the ray light source emitter and the ray receiver are both mounted in the outer protective shell, the outer protective shell further comprises a cover, and the cover is mounted in the outer protective shell. Sliding grooves are formed in the four corners of an inner cavity of the cover body respectively, an L-shaped sliding plate is installed in each sliding groove in a sliding mode, and the upper end faces of the four L-shaped sliding plates are fixedly connected with a top cover. The heat dissipation performance in the inner cavity of the cover body can be greatly improved when the top cover is pulled up, meanwhile, the flexible filter screen layer intercepts dust in the surrounding environment, the dust is prevented from entering the inner cavity of the cover body and affecting a ray light source emitter and a ray receiver of the sensor, and meanwhile the service life of the sensor is prolonged from the side face.

Description

Technical Field

[0001] The utility model relates to the field of surface density sensors, in particular to a sensor for measuring the surface density of a sheet material. Background Art

[0002] Surface density, also known as surface weight, refers to the mass of material per unit area. Online measurement of the surface density of sheets is an important part of controlling product quality during the production process. It is widely used in continuous production industries such as papermaking, plastic films, nonwovens, and metal foils. Online surface density measurement technology is extremely important in modern industrial production. It can monitor the quality of materials in the production process in real time, adjust process parameters in time, and ensure product consistency and high standards.

[0003] In factories, the measurement of area density is mainly achieved through radiation sensors using the radiation penetration method. When traditional sensors are subjected to long-term high-frequency operation, the heat generated in the sensors will gradually increase, resulting in errors in measurement accuracy, which in turn affects product quality. Utility Model Content

[0004] The utility model aims to provide a sensor for measuring the surface density of a sheet material, so as to solve the problems raised in the above-mentioned background technology.

[0005] The utility model solves the technical problem by adopting the following technical solutions:

[0006] A sheet material surface density measurement sensor comprises a radiation light source transmitter, a radiation receiver and an outer protective shell, wherein the radiation light source transmitter and the radiation receiver are both installed in the outer protective shell, and the outer protective shell also comprises a cover body, wherein the inner cavity of the cover body is provided with slide grooves at four corner positions, wherein an L-shaped slide plate is slidably installed in each of the slide grooves, wherein the upper end surfaces of the four L-shaped slide plates are fixedly connected to top covers, wherein the lower end surfaces of the top covers are fixedly connected to flexible filter layers at the four edges, wherein a connecting block is slidably connected to the inner end surface of each L-shaped slide plate, and the bottom of the flexible filter layer is fixedly connected to the corresponding connecting block.

[0007] Preferably, the cover body is fixedly connected to a bottom plate at the bottom of an end away from the top cover, the radiation light source emitter and the radiation receiver are respectively fixedly mounted on the corresponding bottom plate, and the emitting port of the radiation light source emitter and the receiving port of the radiation receiver both pass through the center hole of the bottom plate.

[0008] Preferably, a fixing ring is fixedly embedded in the central hole of the bottom plate member on which the ray light source emitter is installed.

[0009] Preferably, a thickened portion is provided at the bottom of each L-shaped slide plate, and the thickened portion is embedded in the corresponding slide groove.

[0010] Preferably, an inner protrusion is provided in the inner cavity of the cover body, and a threaded hole is provided in each of the inner protrusions.

[0011] The advantages and positive effects of the utility model are:

[0012] The utility model can pull out and adjust the top cover of the sensor, and use the flexible filter layer to perform dust interception, so that the heat dissipation performance in the inner cavity of the cover body can be greatly improved when the top cover is pulled up, and the flexible filter layer intercepts dust in the surrounding environment, preventing dust from entering the inner cavity of the cover body and affecting the radiation light source transmitter and radiation receiver of the sensor, and also indirectly prolonging its service life, which can effectively ensure the accuracy of each detection and effectively avoid the situation where the temperature of the sensor is too high for a long time and causes detection errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0014] Figure 1 This is a schematic diagram of the overall structure of a sensor for measuring the surface density of a sheet material according to the utility model;

[0015] Figure 2 This is a schematic diagram of the expanded structure of a sensor for measuring the surface density of a sheet material according to the utility model;

[0016] Figure 3 This is a schematic diagram of the expanded structure of a transmitter 1 in a sensor for measuring the surface density of a sheet material according to the utility model;

[0017] Figure 4 This is a schematic diagram of the structure of an outer protective shell of a sensor for measuring the surface density of a sheet material according to the utility model;

[0018] Figure 5 This is a schematic diagram of the expanded structure of an outer protective shell of a sheet material surface density measurement sensor of the utility model.

[0019] The symbols in the accompanying drawings are described as follows: transmitter 1; receiver 2; cover body 10; inner protrusion 11; slide groove 12; top cover 13; L-shaped slide plate 14; thickened portion 15; flexible filter layer 16; connecting block 17; bottom plate 18; fixing ring 19; ray light source transmitter 20. DETAILED DESCRIPTION

[0020] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0021] Combine the following Figure 1-5 The utility model is described in detail. For the convenience of description, the directions mentioned below are defined as follows: the up, down, left, right, front and back directions mentioned below are the same as Figure 1 The view direction is consistent in front, back, left, right, up and down. Figure 1 The direction shown is consistent with the front, back, left, right, up and down directions of the device of the utility model when viewed from the front.

[0022] In the present invention, unless otherwise clearly defined and specified, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of at least two elements or the interaction relationship between at least two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] The following is a further description of the embodiments of the present invention in conjunction with the accompanying drawings:

[0024] See also Figure 1-5The utility model provides an embodiment: a sheet surface density measurement sensor, comprising a radiation light source transmitter 20, a radiation receiver 30 and an outer protective shell, wherein the radiation light source transmitter 20 and the radiation receiver 30 are both installed in the outer protective shell, and the outer protective shell also comprises a cover body 10, wherein the inner cavity of the cover body 10 is provided with slide grooves 12 at four corner positions, wherein an L-shaped slide plate 14 is slidably installed in each of the slide grooves 12, wherein the upper end surfaces of the four L-shaped slide plates 14 are fixedly connected with a top cover 13, wherein the lower end surfaces of the top cover 13 are fixedly connected with a flexible filter layer 16 at the edges thereof, wherein a connecting block 17 is slidably connected to the inner end surface of each of the L-shaped slide plates 14, wherein the bottom of the flexible filter layer 16 is fixedly connected to the corresponding connecting block 17, so that the top cover 13 of the entire outer protective shell has a certain sliding adjustability, and at the same time, the top cover 13 of the entire outer protective shell has a certain sliding adjustability, and at the same time, the top cover 13 of the entire outer protective shell has a certain sliding adjustability, and at the same time, the top cover 13 of the entire outer protective shell has a certain sliding adjustability, wherein the top cover 13 of the entire outer protective shell has a certain sliding adjustability, and at the same time, the top cover 13 of the entire outer protective shell has a certain sliding adjustability, wherein the top cover 12 of the entire outer protective shell has a certain sliding adjustability, and at the same time, the top cover 14 ... The flexible filter layer 16 performs dust prevention interception, so that when the top cover 13 is pulled up, the heat dissipation performance in the inner cavity of the cover body 10 will be greatly improved. At the same time, the flexible filter layer 16 intercepts dust in the surrounding environment to prevent dust from entering the inner cavity of the cover body 10 and affecting the sensor's radiation light source transmitter 20 and radiation receiver 30, while also improving its service life from the side. The cover body 10 is fixedly connected to a bottom plate 18 at the bottom of the end away from the top cover 13, and the radiation light source transmitter 20 and the radiation receiver 30 are respectively fixedly mounted on the corresponding bottom plate 18, and the emitting port of the radiation light source transmitter 20 and the receiving port of the radiation receiver 30 both pass through the center hole of the bottom plate 18, and a fixing ring 19 is fixedly embedded in the center hole of the bottom plate 18 on which the radiation light source transmitter 20 is installed.

[0025] It should be noted that in order to further ensure the stability of the top cover 13 during sliding adjustment, in the present embodiment, a thickened portion 15 is provided at the bottom of each L-shaped slide plate 14, and the thickened portion 15 is embedded in the corresponding slide groove 12. The thickened portion 15 is used to form a fitting contact at the bottom of the L-shaped slide plate 14, which makes the adjustment more stable and convenient.

[0026] It is worth mentioning that in the present embodiment, an inner protrusion 11 is provided in the inner cavity of the cover body 10 , and a threaded hole is provided in the inner protrusion 11 , and the inner protrusion 11 is fixed to the bottom plate 18 by bolts.

[0027] In specific implementation, when the sensor is installed on the corresponding body, the pull-out distance of the top cover 13 can be adjusted according to the needs of the detection work. When a long-term high-frequency detection operation is required, the top cover 13 can be pulled out for a longer distance, so as to maximize the heat dissipation performance of the top. When the object to be detected is moved to the middle position of the sensor and the top cover 13 is pulled out, the thickened portion 15 slides along the slide groove 12, and the corresponding flexible filter layer 16 is unfolded around the opening area between the top cover 13 and the cover body 10 to perform a dust-proof interception, so that when the top cover 13 is pulled up, the heat dissipation performance in the inner cavity of the cover body 10 is greatly improved, and the flexible filter layer 16 is The filter layer 16 intercepts dust in the surrounding environment to prevent dust from entering the inner cavity of the cover body 10 and affecting the sensor's radiation light source transmitter 20 and radiation receiver 30. At the same time, its service life is also improved from the side. The radiation light source at the emission point of the radiation light source transmitter 20 is used to penetrate the object to be detected and then is received by the radiation receiver 30. By comparing the difference between the intensity of the incident radiation and the intensity of the transmitted radiation, the surface density is calculated. Even if long-term high-frequency operation is performed, the open heat dissipation port on the top of the outer protective shell can be used for efficient heat dissipation, which can effectively ensure the accuracy of each detection and effectively avoid the situation where the sensor temperature is too high due to long-term operation and thus causes errors in detection.

[0028] It should be emphasized that the embodiments described in the present invention are illustrative rather than restrictive. Therefore, the present invention is not limited to the embodiments described in the specific implementation manner. Any other implementation manners derived by those skilled in the art based on the technical solution of the present invention also fall within the scope of protection of the present invention.

Claims

1. A sheet material surface density measurement sensor, comprising a radiation light source transmitter (20), a radiation receiver (30) and an outer protective shell, wherein the radiation light source transmitter (20) and the radiation receiver (30) are both installed in the outer protective shell, characterized in that: The outer protective shell also includes a cover body (10), the inner cavity of the cover body (10) is respectively provided with slide grooves (12) at four corner positions, each of the slide grooves (12) is slidably installed with an L-shaped slide plate (14), the upper end surfaces of the four L-shaped slide plates (14) are fixedly connected with a top cover (13), the lower end surface of the top cover (13) is respectively fixedly connected with a flexible filter layer (16) at the edges around, the inner end surface of each L-shaped slide plate (14) is respectively slidably connected with a connecting block (17), and the bottom of the flexible filter layer (16) is respectively fixedly connected to the corresponding connecting block (17).

2. The sheet material surface density measuring sensor according to claim 1, characterized in that: The cover body (10) is fixedly connected to a bottom plate (18) at the bottom of one end away from the top cover (13); the radiation light source transmitter (20) and the radiation receiver (30) are respectively fixedly mounted on the corresponding bottom plate (18); and the emission port of the radiation light source transmitter (20) and the receiving port of the radiation receiver (30) both pass through the central hole of the bottom plate (18).

3. The sensor for measuring the surface density of a sheet material according to claim 2, characterized in that: A fixing ring (19) is fixedly embedded in the central hole of the bottom plate (18) on which the ray light source emitter (20) is installed.

4. The sheet material surface density measuring sensor according to claim 1, characterized in that: A thickened portion (15) is provided at the bottom of each L-shaped slide plate (14), and the thickened portion (15) is embedded in the corresponding slide groove (12).

5. The sheet material surface density measuring sensor according to claim 1, characterized in that: An inner protrusion (11) is provided in the inner cavity of the cover body (10), and a threaded hole is provided in each of the inner protrusions (11).

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