Automatic winding and unwinding mechanism of paper bag machine

Abstract

The invention relates to the technical field of paper bag machines, in particular to an automatic winding and unwinding mechanism of a paper bag machine, which comprises a conveying frame, an airflow nozzle array, an airflow detection array, a processing mechanism and a winding and unwinding controller, the airflow nozzle array is arranged on the first side of the paper running path; the airflow detection array is arranged on the second side of the paper running path, and the airflow detection array comprises a plurality of pressure sensors I and is used for detecting the state of airflow penetrating through the paper; the processing mechanism comprises a plurality of miniature ink-jet nozzles which are arranged in one-to-one correspondence with the airflow nozzle arrays; a winding and unwinding control system is carried on the winding and unwinding controller; through the arrangement of the airflow nozzle array and the airflow detection array, airflow can penetrate through a paper damage area to cause abnormal change of air pressure of a detection point, paper damage is rapidly and stably detected, a damage position is marked, an operator can conveniently, rapidly and visually recognize the damage position, and the subsequent production cost is reduced.

Description

Technical Field

[0001] This invention relates to the technical field of paper bag machines, and more particularly to an automatic unwinding and winding mechanism for paper bag machines. Background Technology

[0002] A paper bag machine is an automated device that can process paper into paper bags through operations such as folding, forming, tearing, shaping, and sealing, and then output the finished bags. During the paper bag making process, paper rolls need to be installed on one side of the paper bag machine and evenly fed to the automatic processing equipment to achieve the purpose of automatic unwinding and winding.

[0003] In existing technologies, during the unwinding and winding process, raw paper may be damaged due to various factors such as holes, nicks, or cracks, such as tension fluctuations, material defects, and edge curling. Damaged raw paper becomes even more difficult to detect after it enters the production process and is made into paper bags, affecting the quality of the produced products. Traditional damage detection methods use image recognition visual inspection, which is highly dependent on lighting conditions and has high costs, and cannot effectively address the damaged locations of the raw paper. Summary of the Invention

[0004] This invention provides an automatic unwinding and rewinding mechanism for a paper bag machine. Through an array of airflow nozzles and an airflow detection array, airflow passes through the damaged area of ​​the paper, causing abnormal air pressure changes at the detection point. This allows for rapid and stable detection of paper damage and marks the damaged location, facilitating quick and intuitive identification of the damage by operators and reducing subsequent production costs. The specific solution is as follows: The automatic winding and unwinding mechanism of the paper bag machine includes: A conveyor frame on which a roll is mounted for receiving and unloading rolls of paper; An airflow nozzle array, positioned on the first side of the paper running path, is used to spray vertical airflow onto the paper surface; An airflow detection array is set on the second side of the paper running path and is arranged in a one-to-one correspondence with the airflow nozzle array. The airflow detection array includes multiple pressure sensors for detecting the airflow state after penetrating the paper. The processing mechanism includes multiple micro inkjet printheads arranged in a one-to-one correspondence with the airflow nozzle array, and the micro inkjet printheads are located behind the airflow detection array along the paper running direction. A take-up and unwind controller is provided, which is equipped with a take-up and unwind control system. The take-up and unwind control system includes an array detection module and a distribution processing module. The array detection module is used to collect the detection data of the pressure sensor. The distribution processing module controls the operation of the processing mechanism according to the judgment result of the array detection module.

[0005] Furthermore, the airflow nozzle array includes a jet chamber mounted to the conveyor and a plurality of jet heads mounted on the jet chamber, the plurality of jet heads being arranged linearly.

[0006] Furthermore, the inner cavity of the jet chamber is provided with an air chamber that communicates with multiple jet heads, and the air chamber is connected to an external air source through an air supply pipe; the jet chamber is fixedly connected to a sealing strip on both sides of the linearly arranged jet heads.

[0007] Furthermore, the airflow detection array also includes a detection chamber installed with the conveyor frame and multiple detection heads installed on the detection surface. Each detection head is arranged in a one-to-one correspondence with a jet head. A pressure sensor is installed on the detection head. The detection chamber is located on both sides of the linearly arranged detection heads, and sealing strips are fixedly connected to it.

[0008] Furthermore, the processing mechanism also includes a control ink chamber located in the testing chamber. The control ink chamber is connected to a micro inkjet printhead via a delivery channel, and an ink source is connected to the input end of the control ink chamber via an ink supply tube.

[0009] Furthermore, each of the conveying channels is equipped with a control component, which includes a control block disposed in the conveying channel for controlling the amount of ink ejected and a telescopic motor mounted on the detection chamber, the output end of which is connected to the control block.

[0010] Furthermore, the winding and unwinding control system also includes a positioning module and a control module. The positioning module is used to store the detection time, coordinate information and damage level data of each damage point. The control module is connected to the telescopic motor and the pressure sensor respectively, and is used to control the ink ejection volume of the micro inkjet printhead according to the size of the damage point.

[0011] Furthermore, a control plate is slidably connected in the control ink cavity, a one-way valve is installed on the control plate, a telescopic motor II with its output end connected to the control plate is installed on the detection chamber, a hydraulic sensor is installed in the control ink cavity at the lower part of the control plate, and the winding and unwinding control system also includes a pressure equalization control module, which is connected to the telescopic motor II and the hydraulic sensor respectively.

[0012] Furthermore, a self-testing rod is inserted into the front end of the conveying channel at the adjustment block, and a pressure sensor is installed at the end of the self-testing rod away from the adjustment block.

[0013] Furthermore, the winding and unwinding control system also includes a self-testing module, which is connected to the first telescopic motor, the first pressure sensor, and the second pressure sensor.

[0014] Compared with the prior art, the present invention can achieve at least the following beneficial effects: 1. This invention utilizes an airflow nozzle array and an airflow detection array. Paper passes through these arrays and a processing mechanism. The nozzle array sprays a constant, balanced airflow onto the paper. The array detection module receives real-time sampling data from each pressure sensor and compares it with a set threshold to determine if the airflow penetrates. When the paper is intact and undamaged, the airflow will not penetrate the paper surface, and the pressure sensor outputs 0 or a very small negative pressure. If the paper has a tear or perforation, the airflow will penetrate that area, causing an abnormal change in air pressure at that detection point. The array detection module then determines that the paper at the location corresponding to the pressure sensor is damaged. At this time, the distributed processing module receives the damage determination signal and controls the micro inkjet printhead corresponding to the pressure sensor to mark the damaged area of ​​the paper for subsequent identification and processing. This achieves intelligent and automated detection of paper damage during automatic unwinding and rewinding, and marks the damaged location, allowing operators to quickly and intuitively identify the damage. During paper bag folding production, workers can quickly remove damaged paper, reducing subsequent production costs.

[0015] 2. The control module of this invention controls the action time of the telescopic motor according to the damage level received by the distribution processing module, so as to achieve precise inkjet volume control, which makes it easy for subsequent processes and personnel to quickly and intuitively understand the damage status of the corresponding paper and perform timely screening. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein: Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 This is a schematic diagram of the overall structure of the airflow nozzle array and airflow detection array on the conveyor frame of the present invention.

[0018] Figure 3 This is a block diagram illustrating the control principle of the unwinding and winding control system of the present invention.

[0019] Figure 4 This is a schematic diagram of the airflow nozzle array structure of the present invention.

[0020] Figure 5 This is a cross-sectional view of the airflow nozzle array structure of the present invention.

[0021] Figure 6 This is a schematic diagram of the airflow detection array and processing mechanism of the present invention.

[0022] Figure 7 This is a schematic cross-sectional view of the detection chamber of the present invention.

[0023] Figure 8 This is a schematic diagram showing the positions of the self-testing rod and the pressure sensor in the testing chamber of the present invention.

[0024] Figure 9 This is a schematic diagram of the displacement state of the adjustment block during self-testing according to the present invention.

[0025] The accompanying figure is labeled as follows: 100. Conveyor frame; 101. Roll; 200. Airflow nozzle array; 201. Jet chamber; 202. Air supply pipe; 203. Jet head; 204. Air chamber; 205. Sealing strip one; 300. Airflow detection array; 301. Detection chamber; 302. Detection head; 303. Sealing strip two; 304. Pressure sensor one; 400. Processing mechanism; 401. Ink supply pipe; 402. Miniature inkjet printhead; 403. Control board; 404. Telescopic motor two; 405. Control ink chamber; 406. One-way valve; 407. Hydraulic sensor; 408. Conveyor channel; 409. Telescopic motor one; 410. Adjusting block; 500. Take-up / unwind controller; 6. Self-test rod; 7. Pressure sensor two. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0027] Example 1, please refer to... Figures 1-6 As shown, the present invention provides an automatic winding and unwinding mechanism for a paper bag machine, including a conveyor frame 100, an airflow nozzle array 200, an airflow detection array 300, a processing mechanism 400, and a winding and unwinding controller 500. A roll 101 is mounted on the conveyor frame 100 for winding and unwinding paper. A winding frame is used to mount the roll 101 and support the paper conveying path. The conveyor frame 100 is mounted at the winding and unwinding end of the paper bag machine, and the roll 101 is fixed on it. The roll 101 is rotatably mounted on both sides of the support, and its rotation direction and speed are controlled by a winding motor to adapt to the winding or unwinding conditions of the paper. The paper path is arranged as a guide channel from the roll 101 to the packaging processing area. An airflow detection area is set in the middle section of this channel. The airflow nozzle array 200, the airflow detection array 300, and the processing mechanism 400 are installed in the airflow detection area.

[0028] It is worth mentioning that the airflow nozzle array 200 is disposed on the first side of the paper running path for spraying vertical airflow onto the paper surface; the airflow detection array 300 is disposed on the second side of the paper running path, corresponding one-to-one with the airflow nozzle array 200. The airflow detection array 300 includes multiple pressure sensors 304 for detecting the airflow state after penetrating the paper. The airflow nozzle array 200 and the airflow detection array 300 are located in the middle of the paper running path, with a jet-side and detection-side array structure. A constant and uniform airflow is sprayed onto the paper through the jet-side airflow nozzle array 200. The airflow is controlled by multiple pressure sensors 304 on the airflow detection array 300 on the detection side to detect changes in air pressure as the airflow penetrates the paper. When the paper is intact and undamaged, the ejected airflow will not penetrate the paper surface, and the pressure sensor 304 will output 0 or a very small negative pressure. If there is a tear or perforation in the paper, the airflow will penetrate the area, causing an abnormal change in air pressure at the detection point, which is transmitted in real time to the take-up and unwinding control system. This achieves the purpose of paper damage detection, avoiding the problem of traditional visual detection methods being highly dependent on light and shadow conditions, and enabling fast and stable detection of paper damage.

[0029] In addition, the processing mechanism 400 includes multiple micro inkjet printheads 402, which are arranged one-to-one with the airflow nozzle array 200. The micro inkjet printheads 402 are located behind the airflow detection array 300 along the paper running direction, at several positions after the airflow detection array 300, such as 50-150mm behind. Multiple micro inkjet printheads 402 are arranged along their edge lines. The positions of the micro inkjet printheads 402 correspond one-to-one with the front pressure sensor 304. When a damage is detected at a certain point, the corresponding printhead will achieve point-to-point ink application and synchronous color marking for subsequent processes to identify and process. It also makes it convenient for operators to quickly identify the damaged location. During the paper bag folding production, the staff can quickly remove the damaged paper and reduce subsequent production costs.

[0030] Please see Figure 3The take-up and unwind controller 500 is equipped with a take-up and unwind control system, which includes an array detection module and a distribution processing module. The array detection module is used to collect the detection data from the pressure sensor 304 and determine whether the paper is damaged. The distribution processing module controls the processing mechanism 400 to operate based on the judgment result of the array detection module. The micro inkjet printhead 402 marks the running path at the corresponding damage location with color. When the paper is taken up and unwound by the roll 101, the paper passes through the airflow nozzle array 200, the airflow detection array 300, and the processing mechanism 400. The airflow nozzle array 200 sprays a constant and balanced airflow onto the paper. The array detection module receives the sampling data output in real time from each pressure sensor 304 and compares it with a set threshold to determine whether the airflow penetrates. When the paper is intact... If there is no damage, the ejected airflow will not penetrate the paper surface, and the pressure sensor 304 will output 0 or a very small negative pressure. If there is a tear or perforation in the paper, the airflow will penetrate the area, causing an abnormal change in air pressure at the detection point. The array detection module determines that there is damage to the paper at the location corresponding to the pressure sensor 304. At this time, the distribution processing module receives the damage judgment signal and controls the micro inkjet printhead 402 corresponding to the pressure sensor 304 to work, marking the damaged area of ​​the paper for subsequent processes to identify and process. Thus, during the automatic unwinding and rewinding of paper, intelligent and automated detection of paper damage is achieved, and the damaged location is marked, making it convenient for operators to quickly and intuitively identify the damaged location. When folding paper bags, workers can quickly remove the damaged paper, reducing subsequent production costs.

[0031] Please see Figures 4-5 The airflow nozzle array 200 includes a jet chamber 201 mounted to the conveyor frame 100 and multiple jet heads 203 mounted on the jet chamber 201. The multiple jet heads 203 are arranged linearly. The inner cavity of the jet chamber 201 has an air chamber 204 that communicates with the multiple jet heads 203. The air chamber 204 is connected to an air source through an air supply pipe 202. Several jet heads 203 are installed linearly at the bottom of the jet chamber 201, uniformly covering the width of the paper. The air chamber 204 is connected to an air compressor, i.e., an air source, through the air supply pipe 202, to ensure that the jet heads 203 spray a constant and balanced low-pressure airflow, such as 0.02-0.05 MPa. The jet head 203 restricts the flow of fluid through a constriction design, forming a collimated air column; the jet chamber 201 is located on both sides of the linearly arranged jet head 203, and sealing strips 205 are fixedly connected to it. The sealing strips 205 can limit the air column ejected by the jet head 203 from being affected by the external airflow.

[0032] Please see Figures 6-7The airflow detection array 300 also includes a detection chamber 301 installed with the conveyor frame 100 and multiple detection heads 302 installed on the detection chamber. The detection heads 302 are arranged one-to-one with the jet nozzles 203. A pressure sensor 304 is installed on the detection head 302. The detection chamber 301 is located on both sides of the linearly arranged detection heads 302, and sealing strips 303 are fixedly connected to it. The airflow detection array 300 is located on the other side opposite to the airflow nozzle array 200 and is installed on the surface of the detection chamber 301. The sealing strips 303 can restrict the airflow at the end of the detection head 302 and reduce the influence of external airflow. The detection head 302 is perpendicular to the paper surface. Each detection head 302 is equipped with a pressure sensor to detect the air pressure change when the airflow penetrates the paper. When the paper is intact and undamaged, the ejected airflow will not penetrate the paper surface, and the sensor output is 0 or a very small negative pressure. If there is a tear or perforation in a certain part of the paper, the airflow will penetrate the area, causing an abnormal change in air pressure at the detection point, which is transmitted to the take-up and unwinding control system in real time.

[0033] Please see Figure 7 The processing mechanism 400 also includes a control ink chamber 405 located in the testing chamber 301. The control ink chamber 405 is connected to the micro inkjet printhead 402 via a transport channel 408. The input end of the control ink chamber 405 is connected to an external ink source via an ink supply tube 401. The control ink chamber 405 is used to store and supply ink, which is then transported to the micro inkjet printhead 402 via the transport channel 408 and sprayed onto the paper at the corresponding damaged position.

[0034] In addition, each transport channel 408 is equipped with a control component, which includes a control block set in the transport channel 408 for controlling the amount of ink sprayed and a telescopic motor 409 installed on the detection chamber 301. The output end of the telescopic motor 409 is connected to the control block. The telescopic motor 409 controls the displacement of the control block, controls the expansion and compression of the space of the transport channel 408, thereby adjusting the ink flow rate and thus controlling the ink droplet diameter. This is used to achieve thicker marking for severely damaged areas and finer marking for lightly damaged areas, taking into account both readability of subsequent processes and ink conservation.

[0035] Please see Figure 3The unwinding and rewinding control system also includes a positioning module and a control module. The positioning module stores the detection time, coordinate information, and damage level data for each damage point. The control module is connected to the telescopic motor 409 and the pressure sensor 304, respectively, and is used to control the ink volume of the micro inkjet printhead 402 according to the size of the damage point. The positioning module stores and records the following information for each damage point: horizontal number (printhead number), vertical position (obtained by paper roll distance measurement or pulse encoder), damage judgment value (such as the value read by the pressure sensor 304), and judgment level (minor / moderate / severe), which facilitates the control of the processing mechanism 400 through the distribution processing module. The control module controls the action time of the telescopic motor 409 according to the damage level received by the distribution processing module to achieve precise ink volume control, which facilitates subsequent processes and manual workers to quickly and intuitively understand the damage status of the corresponding paper and perform timely screening and processing.

[0036] Please see Figure 7 A control plate 403 is slidably connected in the ink chamber 405. A one-way valve 406 is installed on the control plate 403. A telescopic motor 404 with its output end connected to the control plate 403 is installed on the detection chamber 301. A hydraulic sensor 407 is installed in the ink chamber 405 below the control plate 403. The take-up and unwinding control system also includes a pressure equalization control module, which is connected to the telescopic motor 404 and the hydraulic sensor 407 respectively. A movable control plate 403 is set inside the ink chamber 405, and a one-way valve 406 is installed on it to maintain inkjet stability, so that the ink flows unidirectionally from top to bottom. The control plate 403 is open to the airflow. The vertically mounted telescopic motor 404 drives the ink to slide up and down, adjusting the pressure inside the cavity and thus regulating the ink output pressure. The pressure equalization control module senses the ink pressure inside the cavity through the hydraulic sensor 407. When the ink pressure is determined to be less than the preset pressure threshold, the telescopic motor 404 is controlled to move downward to increase the ink pressure to the preset value. When the ink pressure is determined to be greater than the preset pressure threshold, the telescopic motor 404 is controlled to move upward to decrease the ink pressure to the preset value, thus achieving dynamic pressure stabilization and controlling the pressure entering the conveying channel 408. This effectively solves the problem of uneven ink spraying caused by fluctuations in operating conditions during the output of inkjet roll material, and facilitates the adjustment of the ink droplet diameter through the control adjustment block 410.

[0037] Example 2 further optimizes the automatic winding and unwinding mechanism of the paper bag machine provided in Example 1. The difference from Example 1 is that... (Please refer to Example 2 for details). Figure 3 and Figure 8 The conveying channel 408 is located at the front end of the adjusting block 410 and is connected to a self-testing rod 6. A pressure sensor 7 is installed at the end of the self-testing rod 6 away from the adjusting block 410. The winding and unwinding control system also includes a self-testing module, which is connected to the telescopic motor 409, the pressure sensor 304, and the pressure sensor 7.

[0038] During prolonged use, ink impurities or the equipment itself can affect the detection accuracy of pressure sensor 304. When the system is in self-test mode, there is no paper between the airflow nozzle array 200 and the airflow detection array 300, and they are set relative to each other. The nozzle releases maximum airflow, and the fluid continuously applies maximum pressure to pressure sensor 304. At this time, the self-test module controls the extension motor 409 to extend by a corresponding amount based on the pressure value received by pressure sensor 304, and pushes the adjusting block 410 to move by a corresponding amount. Through the design of self-test rod 6 and pressure sensor 7, when pressure sensor 304 is in a qualified state, the adjusting block 410 contacts self-test rod 6. When the pressure data received by pressure sensor 7 reaches the preset pressure threshold, the self-test module judges pressure sensor 304 as qualified. Conversely, when the pressure data of pressure sensor 7 is greater than or less than the preset pressure threshold, pressure sensor 304 is judged as unqualified. The self-test mode is mainly used for equipment start-up testing or self-diagnosis during automatic maintenance cycles, thereby improving the accuracy of paper damage detection.

[0039] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An automatic unwinding and rewinding mechanism for a paper bag machine, characterized in that, include: A conveyor frame (100) on which a roll (101) is mounted for receiving and releasing rolls of paper; An airflow nozzle array (200) is disposed on the first side of the paper running path for spraying vertical airflow onto the paper surface; An airflow detection array (300) is set on the second side of the paper running path and is arranged one-to-one with the airflow nozzle array (200). The airflow detection array (300) includes multiple pressure sensors (304) for detecting the airflow state after penetrating the paper. The processing mechanism (400) includes a plurality of miniature inkjet printheads (402), which are arranged one-to-one with the airflow nozzle array (200). The miniature inkjet printheads (402) are located behind the airflow detection array (300) along the paper running direction. A take-up and unwind controller (500) is equipped with a take-up and unwind control system. The take-up and unwind control system includes an array detection module and a distribution processing module. The array detection module is used to collect the detection data of the pressure sensor (304). The distribution processing module controls the processing mechanism (400) to operate according to the judgment result of the array detection module.

2. The automatic winding and unwinding mechanism of the paper bag machine as described in claim 1, characterized in that: The airflow nozzle array (200) includes a jet chamber (201) mounted to the conveyor (100) and a plurality of jet heads (203) mounted on the jet chamber (201), the plurality of jet heads (203) being arranged in a linear manner.

3. The automatic winding and unwinding mechanism of the paper bag machine as described in claim 2, characterized in that: The inner cavity of the jet chamber (201) is provided with an air chamber (204) that communicates with multiple jet heads (203). The air chamber (204) is connected to an external air source through an air supply pipe (202). The jet chamber (201) is fixedly connected to a sealing strip (205) on both sides of the linearly arranged jet heads (203).

4. The automatic winding and unwinding mechanism of the paper bag machine as described in claim 3, characterized in that: The airflow detection array (300) also includes a detection chamber (301) installed with the conveyor frame (100) and multiple detection heads (302) installed on the detection. The detection heads (302) are arranged one-to-one with the jet head (203). The pressure sensor (304) is installed on the detection head (302). The detection chamber (301) is located on both sides of the linearly arranged detection heads (302) and is fixedly connected with sealing strips (303).

5. The automatic winding and unwinding mechanism of the paper bag machine as described in claim 4, characterized in that: The processing mechanism (400) also includes a control ink cavity (405) located in the testing chamber (301). The control ink cavity (405) is connected to the micro inkjet printhead (402) through the delivery channel (408). The input end of the control ink cavity (405) is connected to an ink source through the ink supply pipe (401).

6. The automatic winding and unwinding mechanism of the paper bag machine as described in claim 5, characterized in that: Each of the conveying channels (408) is equipped with a control component, which includes a control block disposed in the conveying channel (408) for controlling the amount of ink ejected and a telescopic motor (409) installed on the detection chamber (301), the output end of which is connected to the control block.

7. The automatic winding and unwinding mechanism of the paper bag machine as described in claim 6, characterized in that: The winding and unwinding control system also includes a positioning module and a control module. The positioning module is used to store the detection time, coordinate information and damage level data of each damage point. The control module is connected to the telescopic motor (409) and the pressure sensor (304) respectively, and is used to control the ink ejection volume of the micro inkjet printhead (402) according to the size of the damage point.

8. The automatic winding and unwinding mechanism of the paper bag machine as described in claim 7, characterized in that: A control plate (403) is slidably connected in the control ink cavity (405). A one-way valve (406) is installed on the control plate (403). A telescopic motor (404) with its output end connected to the control plate (403) is installed on the detection chamber (301). A hydraulic sensor (407) is installed in the lower part of the control plate (403) of the control ink cavity (405). The winding and unwinding control system also includes a pressure equalization control module. The pressure equalization control module is connected to the telescopic motor (404) and the hydraulic sensor (407) respectively.

9. The automatic winding and unwinding mechanism of the paper bag machine as described in claim 7, characterized in that: The conveying channel (408) is connected to a self-testing rod (6) at the front end of the adjusting block (410), and a pressure sensor (7) is installed at the end of the self-testing rod (6) away from the adjusting block (410).

10. The automatic winding and unwinding mechanism of the paper bag machine as described in claim 9, characterized in that: The winding and unwinding control system also includes a self-testing module, which is connected to telescopic motor 1 (409), pressure sensor 1 (304) and pressure sensor 2 (7) respectively.

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