Automatic filter membrane weighing equipment and weighing method
Through the automatic weighing equipment and weighing method of the filter membrane, through multiple weighing and static removal, the problem of low accuracy of the filter membrane weighing results is solved, achieving higher accuracy and lower artificial participation.
Patent Information
- Application Number
- CN202411356945.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-27
- Publication Date
- 2025-01-03
AI Technical Summary
The filter membrane weighing results are low, especially affected by electrostatic interference, resulting in inaccurate weighing results.
Design an automatic filter membrane weighing device and weighing method, by weighing at least three times on the transport carrier and determining the effectiveness of the weighing result, use an electrostatic removal device to remove static electricity, combining a static module and a weighing module , ensure the accuracy of the weighing object during standstill and weighing processes.
It improves the accuracy of filter membrane weighing, reduces manual participation, reduces work intensity, reduces errors, and ensures the accuracy of the final result.
Smart Images
Figure CN119245783A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of filter membrane weighing, and in particular relates to an automatic filter membrane weighing device and a weighing method. Background Art
[0002] With the increasing awareness of environmental protection and the higher requirements of air quality in industrial production, the monitoring of air particle concentration has become increasingly important. Air particle concentration not only affects air quality, but is also directly related to human health and production safety. In many fields such as environmental monitoring, industrial emission control, scientific research and teaching, accurate measurement of air particle concentration has become a basic and key technology.
[0003] There are several methods for detecting air particles, including light projection method, laser backscattering method, charge method, beta-ray absorption method, filtration weighing method, etc. The basic principle of filtration weighing method is to use a filter membrane to filter a certain volume of air, place the filter membrane in a constant temperature and humidity chamber for a period of time, and then weigh it. The concentration of air particles is calculated based on the mass of the filter membrane before and after sampling.
[0004] The requirements for weighing filter membranes are very high and they are easily disturbed by the outside world, especially when the filter membrane or the container for holding the filter membrane carries static electricity. Static electricity can cause inaccurate weighing results, resulting in a low accuracy rate of weighing results. Summary of the invention
[0005] The embodiment of the present invention provides a filter membrane automatic weighing device and a weighing method, aiming to solve the technical problem of low accuracy of weighing results.
[0006] In a first aspect, an embodiment of the present invention provides a filter membrane weighing method, the steps are as follows:
[0007] S1. The staff puts the unsampled filter membranes one by one on the transport carrier. The transport carrier is a standard part with a certain weight. The transport carrier containing the unsampled filter membrane is recorded as A. The static electricity of A is removed and it is determined whether it is completely removed. Then, the weighing system is used to weigh A at least three times to obtain weight values A1, A2, ..., A respectively. n ;
[0008] S2. Determine whether the weighing of A is valid; if the weighing of A is valid, the final weight value of A is A1, A2, ..., A n The average value M A If the weighing of A is invalid, A needs to be weighed again until the weighing of A is determined to be valid and the M is obtained. A ;
[0009] S3, use the weighed filter membrane to take samples;
[0010] S4. The staff puts the sampled filter membranes one by one on the transport carrier. The transport carrier containing the sampled filter membranes is recorded as B. The static electricity of B is removed and it is determined whether it is completely removed. Then, the weighing system is used to weigh B at least three times to obtain weight values B1, B2, ..., B respectively. n ;
[0011] S5. Determine whether the weighing of B is valid; if the weighing of B is valid, the final weight value of B is B1, B2, ..., B n The average value M B If the weighing of B is invalid, B needs to be weighed again until the weighing of B is determined to be valid and the M is obtained. B ;
[0012] S6. Calculate the sampling weight M, where M = M B -M A .
[0013] In some possible implementations, the static electricity removal operation steps are as follows:
[0014] 1) Using anti-static equipment to remove static electricity from A or B;
[0015] 2) using a charge measuring instrument to detect the charge amount of the A or the B in 1);
[0016] 3) If the charge amount is less than or equal to the first preset value, it is determined that the static electricity of A or B is completely removed; if the charge amount is greater than the first preset value, it is determined that the static electricity of A or B is not completely removed, and 2) needs to be repeated until the charge amount is less than or equal to the first preset value.
[0017] In some possible implementations, each of the transported objects has a unique code, and the transported objects used for weighing A and B are the same;
[0018] The weighing system includes a weighing unit, an identification unit and a receiving device. The weighing unit is communicatively connected to the receiving device. The weighing unit transmits the weighed data to the receiving device. The identification unit is communicatively connected to the receiving device. The identification unit can identify the code. The receiving device records the weighing data of each transported load according to the code and automatically calculates M.
[0019] In some possible implementations, the steps of determining whether the weighing of A and B is valid are as follows:
[0020] Step 1: The receiving device automatically calculates A1, A2, ..., A n The difference between any two values in差 , the receiving device automatically calculates B1, B2, ..., B n The difference between any two values in is B difference;
[0021] Step 2: The receiving device compares the A 差 and the second preset value, if the A 差 If the weight of A is greater than or equal to the second preset value, the weighing of A is determined to be invalid. 差 is less than the second preset value, the weighing of A is determined to be valid; the receiving device compares B 差 and the second preset value, if the B 差 If the weight of B is greater than or equal to the second preset value, the weighing of B is determined to be invalid. 差 If it is less than the second preset value, it is determined that the weighing of B is valid.
[0022] In the second aspect, an embodiment of the present invention also provides an automatic membrane weighing device, comprising a body, and also comprising a static module, a static elimination module, a weighing module and a transfer module arranged in the body, the outer wall of the body is provided with a feed port and a discharge port, the feed port and the discharge port are both provided with a conveying component and an opening and closing module, the opening and closing module is used to open or close the feed port and the discharge port, the static module is connected to the end of the conveying component arranged at the feed port, and the transfer module is used to transfer the weighed object between the conveying component, the static module, the static elimination module and the weighing module.
[0023] In some possible implementations, the static module includes a static stand and a timer;
[0024] The static frame comprises:
[0025] Two vertical plates are arranged opposite to each other, and each of the vertical plates is arranged in a vertical direction;
[0026] A plurality of placement plates are arranged in parallel between the two vertical plates, and the placement plates are perpendicular to the vertical plates, each of the placement plates has a plurality of placement areas for placing weighing objects, and a timer is installed in each of the placement areas, and the timer is communicatively connected with the transfer module;
[0027] When the timer reaches a preset time, the transfer module transfers the weighing object in the corresponding placement area to the static electricity removal module.
[0028] In some possible implementations, a placement groove is provided in each of the placement areas, a static plate is slidably adapted in the placement groove, and an elastic member is provided between the bottom surface of the placement groove and the static plate;
[0029] Among them, when the weighing object is placed on the surface of the static plate, the elastic piece is compressed, and the weighing object is located in the placement groove; when the weighing object leaves the static plate, the elastic piece releases the elastic force to push the static plate to a position flush with the surface of the placement plate.
[0030] In some possible implementations, a pressure sensor communicatively connected to the timer is installed in the static plate, and the pressure sensor is used to detect the pressure value exerted on the static plate;
[0031] Among them, when the weighing object is placed on the surface of the static plate, the timer starts when the pressure sensor detects that there is a weighing object on the static plate, the elastic member is compressed, and the piston rod of the first electric cylinder is in a retracted state; when the timer reaches the preset time, the piston rod of the first electric cylinder is in an extended state, and abuts against the static plate to drive the weighing object upward until the top surface of the static plate is flush with the placement plate. After the weighing object is taken away, the pressure sensor recognizes that the static plate is empty, and the piston rod of the first electric cylinder returns to a retracted state.
[0032] In some possible implementations, the opening and closing module includes a baffle and a partition, the baffle covers the feed port or the discharge port and is fixed to the inner wall of the feed port or the discharge port, a feeding port is provided on the top of the baffle, and an avoidance port is also provided on the baffle, the feeding port and the avoidance port are distributed up and down, a storage cavity is provided on the inner wall at the feeding port, the partition is slidably adapted in the storage cavity, the partition has a first working state of extending out of the storage cavity and a second working state of being received in the storage cavity, and the automatic membrane weighing device also includes a driving module for switching the partition between the first working state and the second working state;
[0033] The transmission component is a conveyor, and the conveyor belt of the conveyor passes through the feeding port and the avoidance port respectively, and the inner bottom wall at the feeding port and the inner wall at the avoidance port are both in contact with the conveyor belt of the conveyor;
[0034] When the partition is in the first working state, the partition abuts against the conveyor belt surface of the conveyor; when the partition is in the second working state, the distance between the partition and the conveyor belt surface of the conveyor allows the weighing object to pass through.
[0035] In some possible implementations, the driving module includes a second electric cylinder and a camera, the second electric cylinder is fixedly mounted on the inner wall of the storage chamber, the piston rod of the second electric cylinder is arranged in a vertical direction and fixed to the partition, the camera is used to observe whether there is a weighing object on the conveyor belt surface of the conveyor, and the camera has an observation area;
[0036] When the camera observes that there is a weighing object in the observation area, the second electric cylinder is activated to change the partition from the first working state to the second working state; when the camera observes that there is no weighing object in the observation area, the second electric cylinder is activated to change the partition from the second working state to the first working state
[0037] Compared with the prior art, the present invention:
[0038] 1. The transported cargo needs to be weighed at least three times. After weighing, it is necessary to determine whether the weighing result is valid to avoid invalid data caused by incorrect operation affecting the accuracy of the final result; if the weighing is valid, the final weighing result is the average of multiple weighings, which further improves the accuracy of the final result.
[0039] 2. The conveying component moves the weighing object to the inside of the machine body, and the transfer module transfers the weighing object to the static module for static placement; after the static placement is completed, the transfer module transfers the weighing object to the static removal module; after the static removal is completed, the transfer module transfers the weighing object to the weighing module; after the weighing is completed, the conveying component moves the weighing object outside the machine body. The transfer of weighing inside the machine body is achieved through the transfer module, which reduces the involvement of manual labor and the workload of the staff; at the same time, it reduces errors when the work is heavy and improves the accuracy of weighing. BRIEF DESCRIPTION OF THE DRAWINGS
[0040] Figure 1 This is a schematic diagram of the structure of an automatic membrane weighing device according to an embodiment of the present invention;
[0041] Figure 2 This is a partial cross-sectional view of an opening and closing module and a driving module according to an embodiment of the present invention;
[0042] Figure 3 This is a structural schematic diagram of a static module according to an embodiment of the present invention;
[0043] Figure 4 A partial cross-sectional view showing the positions of the elastic member and the second electric cylinder according to an embodiment of the present invention;
[0044] Figure 5 A system guide diagram for a pressure sensor controlling a timer, and a timer controlling a first electric cylinder;
[0045] Figure 6 System diagram for controlling a second electric cylinder for the camera.
[0046] Description of reference numerals:
[0047] 1. Machine body; 11. Feed inlet; 12. Discharge outlet; 13. Extension plate;
[0048] 2. Opening and closing module; 21. baffle; 211. material passing port; 212. avoidance port; 213. storage chamber; 22. partition;
[0049] 3. Feeding module; 31. Conveyor;
[0050] 4. Static module; 41. Static frame; 411. Vertical plate; 412. Placement plate; 4121. Placement slot; 4122. Static plate; 4123. Elastic member; 4124. First electric cylinder; 42. Timer;
[0051] 5. Driving module; 51. Second electric cylinder; 52. Camera. DETAILED DESCRIPTION
[0052] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.
[0053] Please also read Figures 1 to 6 , the automatic membrane weighing device of the present invention is described. The automatic membrane weighing device comprises a body 1, and also comprises a stationary module 4, a static electricity removal module, a weighing module and a transfer module arranged in the body 1. The outer wall of the body 1 is provided with a feed port 11 and a discharge port 12. The feed port 11 and the discharge port 12 are both provided with a transmission component 3 and an opening and closing module 2. The opening and closing module 2 is used to open or close the feed port 11 and the discharge port 12. The stationary module 4 is connected to the end of the transmission component 3 arranged at the feed port 11. The transfer module is used to transfer the weighed object between the transmission component 3, the stationary module 4, the static electricity removal module and the weighing module.
[0054] Specifically, the transfer module can be a plurality of manipulators, and four manipulators can be provided.
[0055] It should be noted that an extension plate 13 for supporting the feeding module 3 is fixedly provided on the outer wall of the machine body 1; the weighing object is a combination of the transport load and the filter membrane described below.
[0056] Compared with the prior art, the automatic membrane weighing device provided in this embodiment has the following advantages:
[0057] The conveying component 3 moves the weighing object to the inside of the machine body 1, and the transfer module transfers the weighing object to the static module 4 for static placement; after the static placement is completed, the transfer module transfers the weighing object to the static removal module; after the static removal is completed, the transfer module transfers the weighing object to the weighing module; after the weighing is completed, the conveying component 3 moves the weighing object to the outside of the machine body 1. The transfer of the weighing in the machine body 1 is realized by the transfer module, which reduces the participation of manual labor and the work intensity of the staff; at the same time, it reduces errors when the work is heavy and improves the accuracy of weighing.
[0058] In some embodiments, see Figure 3 The static module 4 includes a static frame 41 and a timer 42. The static frame 41 includes two vertical plates 411 and multiple placement plates 412. The two vertical plates 411 are arranged opposite to each other. The vertical plates 411 are arranged in the vertical direction. Multiple placement plates 412 are arranged in parallel between the two vertical plates 411, and the placement plates 412 are perpendicular to the vertical plates 411. Each placement plate 412 has multiple placement areas for placing weighing objects. A timer 42 is installed in each placement area. The timer 42 is communicatively connected to the transfer module.
[0059] When the timer 42 reaches the preset time, the transfer module transfers the weighing objects in the corresponding placement area to the static electricity removal module.
[0060] The resting time of each weighing object is recorded by the timer 42 to ensure that the resting time of each weighing object reaches the preset time, and when the resting time of the weighing object is completed, the transfer module can transfer the weighing object to the static electricity removal module in time to improve the processing efficiency.
[0061] In some embodiments, see Figure 4 A placement groove 4121 is provided in each placement area, a static plate 4122 is slidably adapted in the placement groove 4121 , and an elastic member 4123 is provided between the bottom surface of the placement groove 4121 and the static plate 4122 .
[0062] It should be noted that the elastic member 4123 can be a spring.
[0063] Among them, when the weighing object is placed on the surface of the static plate 4122, the elastic piece 4123 is compressed, and the weighing object is located in the placement groove 4121; when the weighing object leaves the static plate 4122, the elastic piece 4123 releases the elastic force to push the static plate 4122 to a position flush with the surface of the placement plate 412.
[0064] After the weighing object is placed on the static plate 4122, the weighing object will sink into the placement groove 4121; when the body 1 is disturbed by external interference and vibrates, the possibility of the weighing object falling off the static plate 4122 due to vibration is reduced.
[0065] In some embodiments, see Figure 4 and Figure 5 A pressure sensor is installed in the static plate 4122 and is in communication with the timer 42 . The pressure sensor is used to detect the pressure exerted on the static plate 4122 .
[0066] Among them, when the weighing object is placed on the surface of the static plate 4122, the timer 42 starts when the pressure sensor detects that there is a weighing object on the static plate 4122, the elastic member 4123 is compressed, and the piston rod of the first electric cylinder 4124 is in a retracted state; when the timer 42 reaches the preset time, the piston rod of the first electric cylinder 4124 is in an extended state, and abuts against the static plate 4122 to drive the weighing object upward until the top surface of the static plate 4122 is flush with the placement plate 412. After the weighing object is taken away, the pressure sensor recognizes that the static plate 4122 is empty, and the piston rod of the first electric cylinder 4124 returns to the retracted state.
[0067] After the weighing object is placed on the surface of the static plate 4122, the timer 42 automatically starts timing; when the timer 42 reaches the preset time, the first electric cylinder 4124 extends to push the weighing object out of the placement slot 4121, thereby facilitating the transfer module to take the weighing object.
[0068] In some embodiments, see Figure 1 and Figure 2 The opening and closing module 2 includes a baffle 21 and a partition 22. The baffle 21 covers the inside of the feed port 11 or the discharge port 12 and is fixed to the inner wall of the feed port 11 or the inner wall of the discharge port 12. A feed port 211 is provided on the top of the baffle 21. An avoidance port 212 is also provided on the baffle 21. The feed port 211 and the avoidance port 212 are distributed up and down. A storage cavity 213 is provided on the inner wall at the feed port 211. The partition 22 is slidably adapted in the storage cavity 213. The partition 22 has a first working state of extending out of the storage cavity 213 and a second working state of being received in the storage cavity 213.
[0069] The automatic filter membrane weighing device further comprises a driving module 5 for switching the partition 22 between a first working state and a second working state.
[0070] The transmission component 3 is a conveyor 31 , and the conveyor belt of the conveyor 31 passes through the feeding port 211 and the avoidance port 212 respectively. The inner bottom wall at the feeding port 211 and the inner wall at the avoidance port 212 are both in contact with the conveyor belt of the conveyor 31 .
[0071] When the partition 22 is in the first working state, the partition 22 abuts against the conveyor belt surface of the conveyor 31; when the partition 22 is in the second working state, the distance between the partition 22 and the conveyor belt surface of the conveyor 31 allows the weighing object to pass through.
[0072] When the weighing object needs to enter the machine body 1, the feed port 11 is in an open state, and after the weighing object enters the machine body 1, the feed port 11 is in a closed state; when the weighing object comes out of the machine body 1, the discharge port 12 is in an open state, and after the weighing object comes out of the machine body 1, the discharge port 12 is in a closed state. In this way, when no weighing object enters or comes out of the machine body 1, the inside and outside of the machine body 1 are isolated, reducing the impact on the internal environment of the machine body 1 and improving the accuracy of weighing.
[0073] In some embodiments, see Figure 2 and Figure 6 The driving module 5 includes a second electric cylinder 51 and a camera 52. The second electric cylinder 51 is fixedly mounted on the inner wall of the storage chamber 213. The piston rod of the second electric cylinder 51 is arranged in the vertical direction and is fixed to the partition 22. The camera 52 is used to observe whether there is a weighing object on the conveyor belt surface of the conveyor 31. The camera 52 has an observation area.
[0074] Among them, when the camera 52 observes that there is a weighing object in the observation area, the second electric cylinder 51 is started to change the partition 22 from the first working state to the second working state; when the camera 52 observes that there is no weighing object in the observation area, the second electric cylinder 51 is started to change the partition 22 from the second working state to the first working state.
[0075] After the staff places the weighing object on the conveyor belt surface of the conveyor 31 provided at the feeding port 11, the conveyor 31 moves the weighing object to the observation area. The camera 52 observes the weighing object in the observation area, and the second electric cylinder 51 starts to open the feeding port 211. When there is no weighing object in the observation area, the second electric cylinder 51 starts to close the feeding port 211. Thus, the feeding port 211 automatically opens after the weighing object reaches the observation area, and automatically closes after the feeding is completed.
[0076] After the transfer module places the weighing object on the conveyor belt surface of the conveyor 31 at the discharge port 12, the conveyor 31 moves the weighing object to the observation area. The camera 52 observes the weighing object in the observation area, and the second electric cylinder 51 starts to open the feeding port 211. When there is no weighing object in the observation area, the second electric cylinder 51 starts to close the feeding port 211. Therefore, the feeding port 211 automatically opens after the weighing object reaches the observation area, and automatically closes after the discharge is completed.
[0077] In some embodiments, the static electricity removal module includes a static electricity remover and a tester, wherein the static electricity remover is used to remove static electricity from the weighing object, and the tester is used to detect the charge of the weighing object. Static electricity removal is performed before weighing, and after static electricity removal, it is verified whether the static electricity is completely removed, so as to reduce the influence of static electricity during weighing.
[0078] In some embodiments, the weighing module is a balance measurement system, and balance measurement is used to improve measurement accuracy.
[0079] Based on the same inventive concept, the present application also provides a filter membrane weighing method, the steps are as follows:
[0080] S1. The staff puts the unsampled filter membranes one by one on the transport carrier. The transport carrier is a standard part with a certain weight. The transport carrier containing the unsampled filter membrane is recorded as A. A is subjected to static electricity removal and it is determined whether it is completely removed. Then, A is weighed at least three times using a weighing system to obtain weight values A1, A2, ..., A respectively. n ;
[0081] S2. Determine whether the weighing of A is valid; if the weighing of A is valid, the final weight value of A is A1, A2, ..., A n The average value M A If the weighing of A is invalid, A needs to be weighed again until the weighing of A is determined to be valid and the M is obtained. A ;
[0082] S3, use the weighed filter membrane to take samples;
[0083] S4. The staff puts the sampled filter membranes one by one on the transport carrier. The transport carrier containing the sampled filter membranes is recorded as B. The static electricity of B is removed and it is determined whether it is completely removed. Then, the weighing system is used to weigh B at least three times to obtain weight values B1, B2, ..., B respectively. n ;
[0084] S5. Determine whether the weighing of B is valid; if the weighing of B is valid, the final weight value of B is B1, B2, ..., B n The average value M B If the weighing of B is invalid, B needs to be weighed again until the weighing of B is determined to be valid and the M is obtained. B ;
[0085] S6. Calculate the sampling weight M, where M = M B -M A .
[0086] Compared with the prior art, the filter membrane weighing method provided in this embodiment is as follows:
[0087] The transported load needs to be weighed at least three times. After the weighing is completed, it is necessary to determine whether the weighing result is valid to avoid invalid data caused by erroneous operation affecting the accuracy of the final result; if the weighing is valid, the final weighing result is the average of multiple weighings, further improving the accuracy of the final result.
[0088] In some embodiments, the static electricity removal operation steps are as follows:
[0089] 1) Use anti-static equipment to remove static electricity from A or B;
[0090] 2) using a charge measuring instrument to detect the charge amount of A or B in 1);
[0091] 3) If the charge amount is less than or equal to the first preset value, it is determined that the static electricity of A or B is completely removed; if the charge amount is greater than the first preset value, it is determined that the static electricity of A or B is not completely removed, and 2) needs to be repeated until the charge amount is less than or equal to the first preset value.
[0092] A and B are subjected to static electricity removal before weighing to reduce the impact of static electricity on weighing and improve weighing accuracy; after static electricity removal, it is necessary to verify whether the static electricity has been completely removed to ensure the static electricity removal effect.
[0093] In some embodiments, each transport load has a unique code, and the transport load used for weighing A and B is the same.
[0094] The weighing system includes a weighing unit, an identification unit and a receiving device. The weighing unit is communicatively connected with the receiving device. The weighing unit transmits the weighed data to the receiving device. The identification unit is communicatively connected with the receiving device. The identification unit can identify the code. The receiving device records the weighing data of each transported load according to the code and automatically calculates M.
[0095] Each transfer load is provided with a unique code, which can ensure that the transfer load used for measuring A and B is the same; and the code can be recognized by the identification unit, so that the receiving device can record the received weighing data according to the code and automatically calculate M, reducing the workload of the staff.
[0096] In some embodiments, the steps for determining whether the weighing of A and B is valid are as follows:
[0097] Step 1: The receiving device automatically calculates A1, A2, ..., A n The difference between any two values in 差 , the receiving device automatically calculates B1, B2, ..., B n The difference between any two values in B 差 .
[0098] Step 2: Receiving device compares A 差 and the second preset value, if A 差 If A is greater than or equal to the second preset value, the weighing of A is determined to be invalid. 差 If it is less than the second preset value, it is determined that the weighing of A is valid; the receiving device compares B 差 and the second preset value, if B 差 If B is greater than or equal to the second preset value, the weighing of B is determined to be invalid.差 If it is less than the preset value, the weighing of B is determined to be valid.
[0099] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A filter membrane weighing method, characterized in that: Here are the steps: S1. The staff puts the unsampled filter membranes one by one on the transport carrier. The transport carrier is a standard part with a certain weight. The transport carrier containing the unsampled filter membrane is recorded as A. The static electricity of A is removed and it is determined whether it is completely removed. Then, the weighing system is used to weigh A at least three times to obtain weight values A1, A2, ..., A respectively. n ; S2. Determine whether the weighing of A is valid; if the weighing of A is valid, the final weight value of A is A1, A2, ..., A n The average value M A If the weighing of A is invalid, A needs to be weighed again until the weighing of A is determined to be valid and the M is obtained. A ; S3, use the weighed filter membrane to take samples; S4. The staff puts the sampled filter membranes one by one on the transport carrier. The transport carrier containing the sampled filter membranes is recorded as B. The static electricity of B is removed and it is determined whether it is completely removed. Then, the weighing system is used to weigh B at least three times to obtain weight values B1, B2, ..., B respectively. n ; S5. Determine whether the weighing of B is valid; if the weighing of B is valid, the final weight value of B is B1, B2, ..., B n The average value M B If the weighing of B is invalid, B needs to be weighed again until the weighing of B is determined to be valid and the M is obtained. B ; S6. Calculate the sampling weight M, where M = M B -M A .
2. The filter membrane weighing method according to claim 1, characterized in that: The static electricity removal operation steps are as follows: 1) Using anti-static equipment to remove static electricity from A or B; 2) using a charge measuring instrument to detect the charge amount of the A or the B in 1); 3) If the charge amount is less than or equal to a first preset value, it is determined that the static electricity of A or B is completely removed; If the charge amount is greater than the first preset value, it is determined that the static electricity of A or B has not been completely removed, and 2) needs to be repeated until the charge amount is less than or equal to the first preset value.
3. The filter membrane weighing method according to claim 1, characterized in that: Each of the transported cargo has a unique code, and the transported cargo used when weighing A and B is the same; The weighing system includes a weighing unit, an identification unit and a receiving device. The weighing unit is communicatively connected to the receiving device. The weighing unit transmits the weighed data to the receiving device. The identification unit is communicatively connected to the receiving device. The identification unit can identify the code. The receiving device records the weighing data of each transported load according to the code and automatically calculates M.
4. The filter membrane weighing method according to claim 3, characterized in that: The steps for determining whether the weighing of A and B is valid are as follows: Step 1: The receiving device automatically calculates A1, A2, ..., A n The difference between any two values in 差 , the receiving device automatically calculates B1, B2, ..., B n The difference between any two values in is B difference; Step 2: The receiving device compares the A 差 and the second preset value, if the A 差 If the weight of A is greater than or equal to the second preset value, the weighing of A is determined to be invalid. 差 is less than the second preset value, the weighing of A is determined to be valid; the receiving device compares B 差 and the second preset value, if the B 差 If the weight of B is greater than or equal to the second preset value, the weighing of B is determined to be invalid. 差 If it is less than the second preset value, it is determined that the weighing of B is valid.
5. An automatic membrane weighing device for implementing the membrane weighing method according to any one of claims 1 to 4, comprising a body, characterized in that: It also includes a static module, a static elimination module, a weighing module and a transfer module arranged in the body. The outer wall of the body is provided with a feed port and a discharge port. The feed port and the discharge port are both provided with a conveying component and an opening and closing module. The opening and closing module is used to open or close the feed port and the discharge port. The static module is connected to the end of the conveying component arranged at the feed port. The transfer module is used to transfer the weighed objects between the conveying component, the static module, the static elimination module and the weighing module.
6. The automatic membrane weighing device according to claim 5, characterized in that: The static module includes a static rack and a timer; The static frame comprises: Two vertical plates are arranged opposite to each other, and each of the vertical plates is arranged in a vertical direction; A plurality of placement plates are arranged in parallel between the two vertical plates, and the placement plates are perpendicular to the vertical plates, each of the placement plates has a plurality of placement areas for placing weighing objects, and a timer is installed in each of the placement areas, and the timer is communicatively connected with the transfer module; When the timer reaches a preset time, the transfer module transfers the weighing object in the corresponding placement area to the static electricity removal module.
7. The automatic membrane weighing device according to claim 6, characterized in that: A placement groove is provided in each of the placement areas, a static plate is slidably adapted in the placement groove, and an elastic member is provided between the bottom surface of the placement groove and the static plate; Among them, when the weighing object is placed on the surface of the static plate, the elastic piece is compressed, and the weighing object is located in the placement groove; when the weighing object leaves the static plate, the elastic piece releases the elastic force to push the static plate to a position flush with the surface of the placement plate.
8. The automatic membrane weighing device according to claim 7, characterized in that: A pressure sensor is installed in the static plate and is in communication with the timer. The pressure sensor is used to detect the pressure value of the static plate. Among them, when the weighing object is placed on the surface of the static plate, the timer starts when the pressure sensor detects that there is a weighing object on the static plate, the elastic member is compressed, and the piston rod of the first electric cylinder is in a retracted state; when the timer reaches the preset time, the piston rod of the first electric cylinder is in an extended state, and abuts against the static plate to drive the weighing object upward until the top surface of the static plate is flush with the placement plate. After the weighing object is taken away, the pressure sensor recognizes that the static plate is empty, and the piston rod of the first electric cylinder returns to a retracted state.
9. The automatic membrane weighing device according to claim 5, characterized in that: The opening and closing module includes a baffle and a partition, the baffle covers the feed port or the discharge port and is fixed to the inner wall of the feed port or the discharge port, a feeding port is provided on the top of the baffle, and an avoidance port is also provided on the baffle, the feeding port and the avoidance port are distributed up and down, a storage cavity is provided on the inner wall at the feeding port, the partition is slidably adapted in the storage cavity, the partition has a first working state of extending out of the storage cavity and a second working state of being received in the storage cavity, and the automatic membrane weighing device also includes a driving module for switching the partition between the first working state and the second working state; The transmission component is a conveyor, and the conveyor belt of the conveyor passes through the feeding port and the avoidance port respectively, and the inner bottom wall at the feeding port and the inner wall at the avoidance port are both in contact with the conveyor belt of the conveyor; When the partition is in the first working state, the partition abuts against the conveyor belt surface of the conveyor; when the partition is in the second working state, the distance between the partition and the conveyor belt surface of the conveyor allows the weighing object to pass through.
10. The automatic membrane weighing device according to claim 9, characterized in that: The driving module includes a second electric cylinder and a camera, wherein the second electric cylinder is fixedly mounted on the inner wall of the storage chamber, a piston rod of the second electric cylinder is arranged in a vertical direction and fixed to the partition, and the camera is used to observe whether there is a weighing object on the conveyor belt surface of the conveyor, and the camera has an observation area; Among them, when the camera observes that there is a weighing object in the observation area, the second electric cylinder is started to change the partition from the first working state to the second working state; when the camera observes that there is no weighing object in the observation area, the second electric cylinder is started to change the partition from the second working state to the first working state.