Data acquisition system

Abstract

The application provides a data acquisition system for acquiring data of equipment, the equipment comprising a first state and a second state, and the system comprises: a vibration sensor arranged on the equipment and used for converting a vibration signal generated by the equipment into an electric signal; a laser trigger device arranged on the equipment and used for outputting a trigger signal when the equipment is in the first state; and a data collector electrically connected to the laser trigger device and the vibration sensor and used for collecting the electric signal output by the vibration sensor when the trigger signal output by the laser trigger device is received. The application realizes the collection of signals generated by the equipment only at a moment when a specific action is performed, reduces the calculation amount of subsequent data processing, and improves the efficiency of equipment abnormality monitoring.

Description

Technical Field

[0001] The present application relates to the field of data acquisition, and in particular to a device data acquisition system. Background Art

[0002] During processing, equipment anomalies can cause batch anomalies and ultimately interrupt production. During normal operation, equipment anomalies can also damage the equipment. To monitor the equipment's operating status, sensors are typically installed on the equipment to collect vibration signals, process them, and analyze them. However, vibration anomalies typically occur when the equipment is performing a specific action or during a specific time period. Collecting and processing all sensor signals would be computationally intensive, resulting in inefficiencies and making it difficult to determine whether the equipment is experiencing an anomaly. Summary of the Invention

[0003] In view of this, it is necessary to provide a data acquisition system that only collects signals when the device performs a specific action, thereby improving the acquisition efficiency.

[0004] A data acquisition system provided in one embodiment of the present application is used to collect data from a device, wherein the device includes a first state and a second state. The system includes: a vibration sensor, arranged on the device, for converting a vibration signal generated by the device into an electrical signal; a laser triggering device, arranged on the device, for outputting a trigger signal when the device is in the first state; and a data collector, electrically connected to the laser triggering device and the vibration sensor, for collecting the electrical signal output by the vibration sensor when receiving the trigger signal emitted by the laser triggering device.

[0005] Optionally, the device includes a first component and a second component, the first component is fixed, and the second component can move periodically relative to the first component; the laser triggering device includes a light baffle and a laser sensor, the light baffle is arranged on one of the first component and the second component, and the laser sensor is arranged on the other one of the first component and the second component, and is used to output the trigger signal.

[0006] Optionally, the laser sensor is also used to emit a laser signal. When the laser signal is blocked by the light blocking plate, the device is in the first state and the laser sensor outputs the trigger signal; when the laser signal is not blocked by the light blocking plate, the device is in the second state.

[0007] Optionally, the device comprises a first part and a second part, the first part is fixedly arranged, and the second part is periodically movable relative to the first part; the laser trigger device comprises a transmitter and a receiver, the receiver is arranged on one of the first part and the second part, and the transmitter is arranged on the other one of the first part and the second part, and is used to output the trigger signal.

[0008] Optionally, the transmitter is used to emit a laser signal, the receiver is used to receive the laser signal, when the receiver receives the laser signal, the device is in the first state, and the transmitter outputs the trigger signal, when the receiver does not receive the laser signal, the device is in the second state.

[0009] Optionally, the periodic movement comprises: linear reciprocating motion, circular motion or pendulum motion.

[0010] Optionally, the first part is a lower mold, the second part is an upper mold arranged opposite to the lower mold, the upper mold performs up-down linear reciprocating motion relative to the lower mold; or the first part is a fixed base, the second part is a linear motion mechanism arranged opposite to the fixed base, the linear motion mechanism performs horizontal linear reciprocating motion relative to the fixed base; or the first part is a fixed base, the second part is a circular motion mechanism, the circular motion mechanism performs circular motion relative to the fixed base; or the first part is a fixed base, the second part is a pendulum motion mechanism, the pendulum motion mechanism performs pendulum motion relative to the fixed base.

[0011] Optionally, when the device is in the second state, the laser trigger device is further used to output a signal opposite to the trigger signal.

[0012] Optionally, the system further comprises a control unit electrically connected to the data collector, and used to perform data processing on the electrical signal collected by the data collector.

[0013] Optionally, the data processing on the electrical signal collected by the data collector by the control unit comprises: extracting an effective signal, wherein the effective signal is a signal generated by the upper and lower molds of the device at the instant of mold closing; and performing high-frequency removal processing on the effective signal; wherein the high-frequency removal processing on the effective signal comprises: acquiring a cutoff frequency; converting the effective signal from a time domain signal to a frequency domain signal through Fourier transform; and retaining the signal below the cutoff frequency in the frequency domain signal, and then converting it into a time domain signal.

[0014] Compared with the existing technology, the present application has at least the following beneficial effects: through the cooperation of the laser trigger device and the equipment, it is possible to only collect the signal generated by the equipment at the moment of performing a specific action, thereby achieving accurate segmentation of the signal data, reducing the amount of calculation for subsequent data processing, and improving the efficiency of equipment abnormality monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a module diagram of a data acquisition system according to an embodiment of the present application.

[0016] Figure 2 for Figure 1 The laser triggering device shown is a block diagram of the device provided in the first embodiment of the present application.

[0017] Figure 3 for Figure 2 Schematic diagram of the structure of the device and laser trigger device shown.

[0018] Figure 4 for Figure 2 Another structural schematic diagram of the device shown and the laser trigger device.

[0019] Figure 5 for Figure 2 Another structural schematic diagram of the device and the laser triggering device.

[0020] Figure 6 for Figure 2 Another structural schematic diagram of the device shown and the laser trigger device.

[0021] Figure 7 for Figure 2 Another structural schematic diagram of the device shown and the laser trigger device.

[0022] Figure 8 A block diagram of the device and laser triggering device provided in the second embodiment of the present application.

[0023] Figure 9 for Figure 8 Schematic diagram of the structure of the device and laser trigger device shown.

[0024] Figure 10 This is a schematic diagram of extracting effective signals in an embodiment of the present application.

[0025] Figure 11 This is a schematic diagram of removing high-frequency processing of an effective signal in an embodiment of the present application.

[0026] Description of main component symbols

[0027] Device 10

[0028] First component 11

[0029] lower mold 111

[0030] fixed base 112

[0031] second part 12

[0032] upper mold 121

[0033] linear motion mechanism 122

[0034] circumferential motion mechanism 123

[0035] pendulum motion mechanism 124

[0036] belt transmission device 13

[0037] vibration sensor 20

[0038] data collector 30

[0039] laser trigger device 40, 40a

[0040] light barrier 41

[0041] laser sensor 42

[0042] transmitter 43

[0043] receiver 44

[0044] The following specific embodiments will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present application will be described clearly and completely in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0046] Please refer to Figure 1 , Figure 1 is a block diagram of an embodiment of a data acquisition system 100 in the embodiments of the present application. The data acquisition system 100 is used for data acquisition of a device 10. The data acquisition system 100 comprises a vibration sensor 20, a data collector 30 and a laser trigger device 40. In the embodiments of the present application, the vibration sensor 20 and the laser trigger device 40 are both arranged on the device 10. The data collector 30 is electrically connected to the vibration sensor 20 and the laser trigger device 40.

[0047] In the embodiments of the present application, the device 10 generates a vibration signal in real time during the machining process. The device 10 includes a first state and a second state. The first and second states vary depending on the type and structure of the device 10. The specific distinction will be explained in detail below with examples.

[0048] The vibration sensor 20 is used to convert the vibration signal generated by the device 10 in real time during the processing into an electrical signal. It is understood that the electrical signal can be a voltage value.

[0049] The laser triggering device 40 is used to output a laser signal. The laser triggering device 40 is also used to output a first signal when the device 10 is in a first state, and to output a second signal when the device 10 is in a second state.

[0050] In one embodiment, the first signal is a trigger signal having a level opposite to that of the second signal. For example, the first signal is a high-level signal and the second signal is a low-level signal. It is understood that the first signal may also be a low-level signal and the second-level signal may be a high-level signal.

[0051] The data collector 30 is configured to trigger the data collector 30 to collect the electrical signal emitted by the vibration sensor 20 when receiving the first signal emitted by the laser triggering device 40 .

[0052] In this embodiment, the data collector 30 is a high-speed data collector, and its acquisition frequency is generally 2 5 K~2 8 K times / second. For example, in a specific embodiment, the acquisition frequency may be 2 6 K times / second, that is, 64,000 times / second.

[0053] In this embodiment, by setting a specific signal trigger on the data collector 30 (for example, triggering only when the first signal is received), it can be ensured that the data collector 30 only collects the signal generated at the moment the device performs a specific action, thereby achieving accurate segmentation of the signal data.

[0054] See also Figure 2 In this embodiment, the device 10 includes a first component 11 and a second component 12. The first component 11 can be fixed. The second component 12 can move periodically relative to the first component 11.

[0055] In one embodiment, the laser triggering device 40 includes a light barrier 41 and a laser sensor 42. The light barrier 41 is disposed relative to the first component 11, for example, on the first component 11. The laser sensor 42 is disposed relative to the second component 12, for example, on the second component 12. The laser sensor 42 is configured to output the laser signal. When the second component 12 periodically moves relative to the first component 11, the second component 12 drives the laser sensor 42 to move relative to the light barrier 41 disposed on the first component 11, thereby blocking the laser signal emitted by the laser sensor 42 by the light barrier 41. When the second component 12 periodically moves relative to the first component 11, such that the laser signal output by the laser sensor 42 is blocked by the light barrier 41, the device 10 is in the first state. At this time, the laser sensor 42 also outputs the first signal. When the second component 12 periodically moves relative to the first component 11, such that the laser signal output by the laser sensor 42 is not blocked by the light barrier 41, the device 10 is in the second state. At this time, the laser sensor 42 also outputs the second signal.

[0056] It is understood that the positions of the light shield 41 and the laser sensor 42 can be interchanged. That is, the laser sensor 42 is disposed on the first component 11, and the light shield 41 is disposed on the second component 12. It is sufficient to ensure that the light shield 41 and the laser sensor 42 can move relative to each other, thereby ensuring that the laser signal output by the laser sensor 42 is either blocked or not blocked by the light shield 41. This is also the case in the following embodiments and will not be further described.

[0057] It is understood that the laser trigger device 40 in the above-mentioned data acquisition system 100 can be applied to different devices. Figure 3 To the attached Figure 7 , the working principle of the laser triggering device 40 is described in detail.

[0058] See also Figure 3 In one embodiment of the present application, the device 10 may be a forging machine, stamping machine, or molding machine used in industrial production. For example, the first component 11 is specifically a lower mold 111, and the second component 12 is specifically an upper mold 121 disposed opposite the lower mold 111. The upper mold 121 can perform vertical linear reciprocating motion relative to the lower mold 111. The light shield 41 is disposed on the upper mold 121 of the device 10, and the laser sensor 42 is disposed on the lower mold 111 for emitting the laser signal.

[0059] When the device 10 begins mold closing, the light shield 41 moves along with the upper mold 121 toward the lower mold 111. When the device 10 enters the mold closing moment and the light shield 41 moves to a position where it can block the laser signal emitted by the laser sensor 42 (as shown in the figure), the device 10 enters the first state, and the laser triggering device 40 begins to output the first signal through the laser sensor 42. When the light shield 41 moves again to a position where the laser signal from the laser sensor 42 cannot reach (i.e., the laser signal is not blocked), the mold closing moment ends, and the device 10 enters the second state. During other times outside the mold closing moment, the laser triggering device 40 no longer outputs the first signal, but instead outputs the second signal through the laser sensor 42.

[0060] Obviously, by setting the laser trigger device 40 on the upper mold 121 and the lower mold 111 of the equipment 10 to cooperate with the data collector 30, it is possible to only collect the signal generated by the equipment 10 at the moment of performing a certain specific action (such as the moment of mold closing), thereby achieving accurate segmentation of the signal data, reducing the amount of calculation for subsequent data processing, and improving the efficiency of abnormal monitoring of the equipment 10.

[0061] Of course, in other embodiments, when the device 10 is in the second state, the laser triggering device 40 may not output the second signal, that is, only output the laser signal without outputting other signals.

[0062] See also Figure 4 In another embodiment of the present application, the device 10 may be a ball screw machine, a forming machine, a pin insertion machine, or the like used in industrial production. For example, the first component 11 is specifically a fixed base 112, and the second component 12 is specifically a linear motion mechanism 122. The linear motion mechanism 122 can perform horizontal linear reciprocating motion relative to the fixed base 112.

[0063] The light shield 41 is mounted on the fixed base 112 of the device 10, and the laser sensor 42 is mounted on the linear motion mechanism 122 for emitting laser signals. When the device 10 starts operating normally, the laser sensor 42 always emits laser signals within a certain range.

[0064] When the linear motion mechanism 122 is in the forward stroke, it gradually approaches the fixed base 112, and the laser signal emitted by the laser sensor 42 gradually approaches the light barrier 41. Until the laser signal is able to illuminate the light barrier 41, that is, until the laser signal is blocked by the light barrier 41, the device 10 enters the first state, and the laser triggering device 40 outputs the first signal through the laser sensor 42.

[0065] When the linear motion mechanism 122 is in the return stroke, it gradually moves away from the fixed base 112, and the laser signal emitted by the laser sensor 42 also gradually moves away from the light baffle 41. Until the laser signal can no longer illuminate the light baffle 41, that is, when the laser signal is no longer blocked by the light baffle 41, the device 10 enters the second state, and the laser triggering device 40 no longer outputs the first signal, but outputs the second signal through the laser sensor 42.

[0066] It can be understood that the range of the laser signal emitted by the laser sensor 42 can be adjusted. For example, the maximum range of the laser signal is 300 mm. During actual data collection, the range of the laser signal can be adjusted according to the length of the time period to be collected.

[0067] See also Figure 5 In another embodiment of the present application, the device 10 may be a CNC machine, a blower, or other equipment with a rotating shaft. For example, the first component 11 is specifically a fixed base 112, and the second component 12 is specifically a circular motion mechanism 123. The circular motion mechanism 123 performs circular motion with a fixed point as the center.

[0068] The light baffle 41 is disposed on the fixed base 112 of the device 10, and the laser sensor 42 is disposed on the circular motion mechanism 123, and emits a laser signal outward along the radius of the circle formed by the motion trajectory. When the circular motion mechanism 123 is in the process of circular motion, the laser sensor 42 will periodically approach and move away from the fixed base 112. For example, when the circular motion mechanism 123 gradually approaches the fixed base 112 and when it moves to a certain angle, the laser signal emitted by the laser sensor 42 will begin to illuminate the light baffle 41. At this time, the laser signal is blocked by the light baffle 41, the device 10 enters the first state, and the laser triggering device 40 outputs the first signal through the laser sensor 42.

[0069] For another example, when the circular motion mechanism 123 gradually moves away from the fixed base 112 and moves to another angle, the laser signal emitted by the laser sensor 42 no longer shines on the light baffle 41. At this point, the laser signal is no longer blocked by the light baffle 41, and the device 10 enters the second state. The laser triggering device 40 no longer outputs the first signal, but instead outputs the second signal through the laser sensor 42.

[0070] Please refer to Figure 6It can be understood that in another embodiment of the present application, the device 10 can be an automatic production line belt transmission device, a logistics warehouse conveyor belt, etc. At this time, the circular motion mechanism 123 can be centered at one point and perform periodic motions along other trajectories around the point. For example, the circular motion mechanism 123 is fixedly mounted on a belt transmission device 13 of an automatic production line, and the laser sensor 42 is mounted on the circular motion mechanism 123. As the belt transmission device 13 operates normally, the laser sensor 42 will also periodically approach and move away from the fixed base 112. Obviously, when the device 10 is Figure 6 When the automatic production line belt transmission device, logistics warehouse conveyor belt, etc. are shown, they output corresponding laser signals. The principle of the first signal and the second signal is the same as Figure 5 The device 10 shown is similar and will not be described again here.

[0071] See also Figure 7 In another embodiment of the present application, the device 10 may be a large pendulum device or an entertainment device that performs pendulum motion. For example, the first component 11 may be a fixed base 112, and the second component 12 may be a pendulum motion mechanism 124. The pendulum motion mechanism 124 performs periodic pendulum motion within a certain range, centered around a fixed point.

[0072] The light baffle 41 is disposed on the fixed base 112 of the device 10. The laser sensor 42 is disposed on the pendulum motion mechanism 124, facing the fixed base 112, and is configured to emit a laser signal. When the pendulum motion mechanism 124 is performing pendulum motion, the laser sensor 42 periodically approaches and moves away from the fixed base 112. For example, when the pendulum motion mechanism 124 gradually approaches the fixed base 112 and moves to a certain angle, the laser signal emitted by the laser sensor 42 will illuminate the light baffle 41. At this point, the laser signal is blocked by the light baffle 41, the device 10 enters the first state, and the laser triggering device 40 outputs the first signal.

[0073] For another example, when the pendulum motion mechanism 124 gradually moves away from the fixed base 112 and reaches another angle, the laser signal emitted by the laser sensor 42 no longer illuminates the light baffle 41. At this point, the laser signal is no longer blocked by the light baffle 41, and the device 10 enters the second state. The laser triggering device 40 no longer outputs the first signal, but instead outputs the second signal via the laser sensor 42.

[0074] It can be understood that, as described above, the laser triggering device 40 includes a light shield 41 and a laser sensor 42. Of course, in the embodiment of the present application, the laser triggering device 40 may also include other components, that is, the structure of the laser triggering device 40 is not limited. For example, see Figure 8 In another embodiment of the present application, the laser triggering device 40a includes a transmitter 43 and a receiver 44. The transmitter 43 is provided on the second component 12 and is used to transmit the laser signal. The receiver 44 is provided on the first component 11 and is used to receive the laser signal.

[0075] For the convenience of description, the following describes the positional relationship and working principle of the laser trigger device 40a and the device 10, taking the device 10 as an example of a forging device, a stamping device, a forming machine, etc. used in industrial production. Of course, the laser trigger device 40a can also be applied to Figures 4 to 7 The device 10 shown is not described in detail here.

[0076] Specifically, see Figure 9 In a specific embodiment, the transmitter 43 is disposed on the upper mold 121 , and the receiver 44 is disposed on the lower mold 111 .

[0077] When the device 10 begins mold closing, the transmitter 43 moves with the upper mold 121 toward the lower mold 111. When the device 10 reaches the mold closing moment and the transmitter 43 moves to a position where the receiver 44 can receive the laser signal, the device 10 enters the first state, and the laser triggering device 40 further outputs the first signal via the transmitter 43. When the transmitter 43 moves again to a position where the receiver 44 can no longer receive the laser signal, the mold closing moment ends, and the device 10 enters the second state, which is a time period other than the mold closing moment. At this point, the laser triggering device 40 no longer outputs the first signal, but instead outputs the second signal via the transmitter 43.

[0078] Similarly, the positions of the transmitter 43 and the receiver 44 can be swapped, that is, the receiver 44 is provided on the second component 12 for receiving the laser signal, and the transmitter 43 is provided on the first component 11 for sending the laser signal.

[0079] Please refer again Figure 1 In an embodiment of the present application, the device data acquisition system 100 further includes a control unit 50. The control unit 50 is electrically connected to the data collector 30 and is configured to process the electrical signals collected by the data collector 30. The control unit 50 may be, for example, an industrial computer.

[0080] Specifically, the data processing of the electric signal collected by the data collector 30 by the control unit 50 includes extracting the effective signal and high-frequency removing processing of the effective signal. The effective signal is the signal generated by the equipment 10 at the moment of performing a specific action, for example, the signal generated by the equipment 10 with the lower mold 111 and the upper mold 121 at the moment of closing the mold.

[0081] Referring to Figure 10 In the embodiment of the present application, the Figure 10 The process of extracting the effective signal by the control unit 50 is described by taking the three vibration sensors 20 shown in (a), (b) and (c) as examples (one vibration sensor 20 is installed at each of the three different positions of the equipment 10).

[0082] Taking the equipment 10 with upper and lower molds as an example, the process of completing one opening and closing of the mold is completed, and the laser trigger device 40 completes one triggering. For example, Figure 10 The effective signal at the moment of closing the mold appears in the second vibration sensor 20 shown in (b). Figure 10 The effective signal at the moment of closing the mold appears in the second vibration sensor 20 shown in (b). Figure 10 As shown in (e), the signal is further windowed, that is, a part of the effective signal is processed to facilitate the high-frequency removing processing in segments.

[0083] In the embodiment of the present application, the high-frequency removing processing of the effective signal includes obtaining a cutoff frequency, converting the effective signal from a time domain signal to a frequency domain signal through Fourier transform, and retaining the signal below the cutoff frequency in the frequency domain signal, and then converting it to a time domain signal to obtain a high-frequency removed signal.

[0084] Referring to Figure 11 The high-frequency removing processing of the effective signal in the embodiment is shown in the schematic diagram. As shown in Figure 11 As shown in (a), the effective signal has more burrs (i.e. high-frequency components). In order to better display the results, as shown in Figure 11 As shown in (b), the effective signal is converted from a time domain signal to a frequency domain signal through Fourier transform. Then, the filter is used to remove the high-frequency interference signal above the cutoff frequency (for example, 1 kHz), and then inverse Fourier transform is performed to convert it to a time domain signal to generate the high-frequency removed signal as shown in Figure 11 (c).

[0085] By extracting the effective signal and removing the high-frequency from the electric signal collected by the vibration sensor 20, more accurate signal data can be obtained to facilitate good monitoring of the state of the equipment 10.

[0086] The embodiment of the present application sets the laser trigger device 40 on the first component 11 and the second component 12 of the device 10, thereby only collecting the signal generated by the device 10 at the moment of performing a specific action, achieving accurate segmentation of the signal data, reducing the amount of calculation for subsequent data processing, and improving the efficiency of abnormal monitoring of the device 10.

[0087] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present application and are not used as a limitation on the present application. As long as they are within the spirit of the present application, appropriate changes and modifications to the above embodiments should fall within the scope of protection claimed in the present application.

Claims

1. A data acquisition system for collecting data from a device, wherein the device includes a first state and a second state, and is characterized in that: The system comprises: a vibration sensor, provided on the device, for converting a vibration signal generated by the device into an electrical signal; a laser triggering device, provided on the device, for outputting a trigger signal when the device is in the first state; A data collector is electrically connected to the laser trigger device and the vibration sensor, and is used to collect the electrical signal output by the vibration sensor when receiving the trigger signal sent by the laser trigger device.

2. The system according to claim 1, wherein The device includes a first component and a second component, the first component is fixed, and the second component can move periodically relative to the first component; The laser triggering device includes a light shielding plate and a laser sensor. The light shielding plate is arranged on one of the first component and the second component. The laser sensor is arranged on the other one of the first component and the second component and is used to output the trigger signal.

3. The system according to claim 2, wherein: The laser sensor is further configured to emit a laser signal. When the laser signal is blocked by the light blocking plate, the device is in the first state, and the laser sensor outputs the trigger signal. When the laser signal is not blocked by the light blocking plate, the device is in the second state.

4. The system according to claim 1, wherein: The device includes a first component and a second component, the first component is fixed, and the second component can move periodically relative to the first component; The laser triggering device includes a transmitter and a receiver. The receiver is disposed on one of the first component and the second component. The transmitter is disposed on the other of the first component and the second component and is used to output the trigger signal.

5. The system according to claim 4, wherein: The transmitter is used to transmit a laser signal, and the receiver is used to receive the laser signal. When the receiver receives the laser signal, the device is in the first state, and the transmitter outputs the trigger signal. When the receiver does not receive the laser signal, the device is in the second state.

6. The system according to any one of claims 2 to 5, characterized in that The periodic motion includes linear reciprocating motion, circular motion or pendulum motion.

7. The system according to claim 6, wherein: The first component is a lower mold, and the second component is an upper mold arranged opposite to the lower mold, and the upper mold performs a linear reciprocating motion up and down relative to the lower mold; Alternatively, the first component is a fixed base, and the second component is a linear motion mechanism component disposed opposite to the fixed base, and the linear motion mechanism component performs horizontal linear reciprocating motion relative to the fixed base; Alternatively, the first component is a fixed base, and the second component is a circular motion mechanism, and the circular motion mechanism performs circular motion relative to the fixed base; Alternatively, the first component is a fixed base, and the second component is a pendulum motion mechanism component, and the pendulum motion mechanism component performs a pendulum motion relative to the fixed base.

8. The system according to claim 1, wherein: When the device is in the second state, the laser triggering device is further configured to output a signal opposite to the triggering signal.

9. The system according to claim 1, wherein: The system further comprises a control unit, which is electrically connected to the data collector and is used for performing data processing on the electrical signals collected by the data collector.

10. The system according to claim 9, wherein: The control unit performs data processing on the electrical signal collected by the data collector, including: Extracting a valid signal, wherein the valid signal is a signal generated by the upper and lower molds of the device at the moment of mold closing; and Performing high-frequency removal processing on the effective signal; The performing high-frequency removal processing on the effective signal includes: Get a cutoff frequency; Converting the effective signal from a time domain signal to a frequency domain signal by Fourier transform; and The signal below the cutoff frequency in the frequency domain signal is retained and then converted into a time domain signal.

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