Accumulated voltage monitoring method and device and translation type test sorting machine

Abstract

The invention belongs to the technical field of electrostatic detection, and particularly relates to an accumulated voltage monitoring method and device and a translation type test sorting machine. The accumulated voltage monitoring device comprises a first detection part and a monitoring part, and the first detection part is used for detecting the charge quantity of electrostatic charges on the surface of a transfer part; the monitoring part is configured to judge whether the accumulated voltage of the surface of the transfer part is within a first threshold range or not based on the charge quantity of the electrostatic charges on the surface of the transfer part, and if the accumulated voltage exceeds the first threshold range, shutdown alarm processing is carried out. In the product transfer process, the first detection part can detect the charge quantity of electrostatic charges on the surface of the transfer part and feed back the charge quantity to the monitoring part, the monitoring part judges whether accumulated voltage on the surface of the transfer part is within a first threshold range or not based on the charge quantity of the electrostatic charges on the surface of the transfer part, and if the accumulated voltage exceeds the first threshold range, the monitoring part gives an alarm. And shutdown processing is carried out on the transfer part, so that the accumulated voltage in the working environment is monitored in real time, and the safety of products in the transfer process can be guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of electrostatic detection, and particularly to a method and device for monitoring accumulated voltage and a translational test sorter. Background Art

[0002] With the continuous development of the chip industry, the technologies of 2.5D packaging and 3D packaging are constantly iterated and upgraded. After the chip is packaged, its internal structure becomes more and more complex, and its cost is also gradually increasing. After the chip is packaged, the next process is chip testing, and the test is mainly to detect and screen the chip quality.

[0003] During the chip detection process, the chip is picked and placed by a transfer unit to realize the transfer of the chip between different workstations. The transfer unit is likely to generate static electricity on the surface during the process of transferring products. External electrostatic discharge may damage or destroy the internal structure of the chip. Especially for electrostatic-sensitive chips, it is easy to cause chip function failure or performance degradation. However, currently, during the testing process, the static charges in the working environment where the transfer unit is located cannot be monitored, so the product safety of the chip cannot be guaranteed in real time during the detection process.

[0004] Therefore, the above problems need to be solved urgently. Summary of the Invention

[0005] The purpose of the present invention is to provide a method and device for monitoring accumulated voltage and a translational test sorter to monitor the static charges in the working environment in real time, so as to ensure the safety of the chip during the transfer process.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] An accumulated voltage monitoring method for monitoring the accumulated voltage in the working environment where the transfer unit is located, the transfer unit being used for transferring products, and the method includes:

[0008] Detect the amount of static charge on the surface of the transfer unit and feedback it to the monitoring unit;

[0009] The monitoring unit determines whether the accumulated voltage on the surface of the transfer unit is within a first threshold range based on the amount of static charge on the surface of the transfer unit, where the accumulated voltage on the surface of the transfer unit is denoted as U1;

[0010] If the U1 exceeds the first threshold range, stop the machine and give an alarm.

[0011] Preferably, the transfer unit has electrical conductivity;

[0012] The accumulated voltage monitoring method further includes:

[0013] Connect the transfer unit to the ground wire to form a grounding circuit;

[0014] Detect the grounding resistance of the transfer unit and feedback it to the monitoring unit;

[0015] The monitoring unit determines whether the U1 is within the first threshold range based on the value of the grounding resistance.

[0016] Preferably, the accumulated voltage monitoring method further includes:

[0017] Detect the accumulated voltage of static charges in the atmosphere of the working environment, where the accumulated voltage of static charges in the atmosphere is denoted as U2;

[0018] Transmit the U2 to the monitoring unit, and the monitoring unit determines whether the U2 exceeds the second threshold range;

[0019] If the U2 exceeds the second threshold range, stop the machine and give an alarm.

[0020] Preferably, the accumulated voltage monitoring method further includes:

[0021] Use an ion generator to emit positive and negative ion airflows into the working environment;

[0022] The ion generator is electrically connected to the monitoring unit, and the monitoring unit controls the output amount of the positive and negative ion airflows based on the U2 to dynamically adjust the accumulated voltage in the atmosphere and make it within the second threshold range.

[0023] An accumulated voltage monitoring device, which includes:

[0024] A first detection unit, which is electrically connected to the transfer unit and is used to detect the amount of static charges on the surface of the transfer unit;

[0025] A monitoring unit, which is electrically connected to the first detection unit, and the monitoring unit is configured to determine whether the accumulated voltage on the surface of the transfer unit is within the first threshold range based on the amount of static charges on the surface of the transfer unit. If the U1 exceeds the first threshold range, stop the machine and give an alarm.

[0026] Preferably, the first detection unit has a positive connection end and a negative connection end, and both the positive connection end and the negative connection end are connected to the outer surface of the transfer unit to form a detection circuit.

[0027] Preferably, the transfer unit has electrical conductivity;

[0028] The accumulated voltage monitoring device further includes:

[0029] A ground wire, which is connected to the transfer unit and forms a grounding circuit;

[0030] A second detection unit is connected in series to the grounding line and electrically connected to the monitoring unit. The second detection unit is configured to detect the grounding resistance of the transfer unit.

[0031] Preferably, the accumulated voltage monitoring device further includes a third detection unit configured to detect the accumulated voltage of static charges in the atmosphere of the working environment, where the accumulated voltage in the atmosphere is denoted as U2;

[0032] The third detection unit is electrically connected to the monitoring unit, and the monitoring unit is further configured to determine whether U2 exceeds a second threshold range. If U2 exceeds the second threshold range, a shutdown alarm process is performed.

[0033] Preferably, the accumulated voltage monitoring device further includes an ion generator and an ion controller. The ion generator is disposed in the working environment and configured to emit positive and negative ion airflows into the working environment; the ion controller is electrically connected to the ion generator;

[0034] The ion controller is electrically connected to the monitoring unit, and the monitoring unit is further configured to control the output amount of the positive and negative ion airflows through the ion controller based on U2 to dynamically adjust the accumulated voltage in the atmosphere and keep it within the second threshold range.

[0035] Preferably, a plurality of ion generators are provided, and the ion emission ranges of two adjacent ion generators have an overlapping area of 10% to 50%.

[0036] A translational test sorter includes a transfer unit and the accumulated voltage monitoring device as described above. The transfer unit is used to transfer products, and the accumulated voltage monitoring device is used to monitor the accumulated voltage in the working environment where the transfer unit is located.

[0037] Advantages of the present invention:

[0038] In the accumulated voltage monitoring method, device, and translational test sorter of the present invention, during the transfer of products, the first detection unit can detect the amount of static charges on the surface of the transfer unit and feedback it to the monitoring unit. The monitoring unit determines whether the accumulated voltage on the surface of the transfer unit is within the first threshold range based on the amount of static charges on the surface of the transfer unit. If the detected accumulated voltage exceeds the first threshold range, the monitoring unit issues a warning and shuts down the transfer unit. With such a setting, the accumulated voltage in the working environment can be monitored in real time, thereby ensuring the safety of products during the transfer process. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 is a schematic structural diagram of the transfer unit and the product in an embodiment of the present invention;

[0040] Figure 2 is one of the schematic structural diagrams of the accumulated voltage detection device in the embodiments of the present invention;

[0041] Figure 3 is another schematic structural diagram of the accumulated voltage detection device in the embodiments of the present invention;

[0042] Figure 4 is one of the schematic structural diagrams of the ion generator in the embodiments of the present invention;

[0043] Figure 5 is another schematic structural diagram of the ion generator in the embodiments of the present invention;

[0044] Figure 6 is the third schematic structural diagram of the ion generator in the embodiments of the present invention.

[0045] In the figure:

[0046] 100, product; 200, transfer part;

[0047] 1, first detection part; 2, second detection part; 3, third detection part; 4, ion generator. Detailed implementation manners

[0048] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. Additionally, it should be noted that for the convenience of description, only the parts related to the present invention rather than all the structures are shown in the drawings.

[0049] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0050] In the present invention, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0051] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "left" and "right" are based on the orientation or positional relationships shown in the drawings. They are only for the convenience of description and simplifying the operations, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for differentiation in description and have no special meanings.

[0052] Please refer to Figure 1 , when the transfer unit 200 transfers the product 100, due to the action of friction, static charges in the working environment where the transfer unit 200 is located are likely to accumulate. For electrostatic-sensitive products 100, the accumulated voltage generated by the static charges is likely to damage or destroy the internal structure of the products. For this reason, in this embodiment, a method for monitoring the accumulated voltage is proposed to monitor the accumulated voltage in the working environment where the transfer unit 200 is located to ensure the quality of the product 100. In this embodiment, the product 100 is described by taking a chip as an example. Of course, in some other feasible embodiments, the product 100 may also be other electrostatic-sensitive products 100, which will not be elaborated here.

[0053] Specifically, the method for monitoring the accumulated voltage includes:

[0054] Detect the amount of static charges on the surface of the transfer unit 200 and feedback it to the monitoring unit;

[0055] The monitoring unit determines whether the accumulated voltage on the surface of the transfer unit 200 is within the first threshold range based on the amount of static charges on the surface of the transfer unit 200, where the accumulated voltage on the surface of the transfer unit 200 is denoted as U1;

[0056] If U1 exceeds the first threshold range, stop the machine and give an alarm for processing.

[0057] It is understandable that during the process of the transfer unit 200 transferring the product 100, as the static charge on the surface of the transfer unit 200 continues to accumulate, U1 continues to increase. When U1 exceeds the first threshold range, the accumulated voltage generated by the static charge can easily cause damage to the product 100. The monitoring unit can monitor U1 in real time, thereby avoiding the generation of excessive accumulated voltage on the surface of the transfer unit 200, thereby ensuring the safety performance of the product 100.

[0058] It should be noted that by detecting the amount of static charge on the surface of the transfer part 200, denoted as Q, and obtaining the capacitance C of the transfer part 200, the monitoring part can calculate U1 through Q / C. Such a setting can avoid external electromagnetic interference to improve accuracy.

[0059] In this embodiment, the transfer unit 200 has a conductive property; the accumulated voltage monitoring method further includes:

[0060] The transfer part 200 is connected to the grounding wire to form a grounding circuit; it can be understood that under the action of the grounding wire, the transfer part 200 can be in a grounded state, that is, under the action of the grounding wire, the amount of charge attached to the surface of the transfer part 200 can be discharged, thereby avoiding the accumulation of static charge on the surface of the transfer part 200, thereby ensuring the safety performance of the product 100.

[0061] Furthermore, the accumulated voltage monitoring method further includes:

[0062] Detecting the grounding resistance of the transfer unit 200 and feeding it back to the monitoring unit;

[0063] The monitoring unit determines whether U1 is within a first threshold range based on the resistance value of the grounding resistor.

[0064] It can be understood that when the transfer part 200 is in a grounded state, the grounding resistance is not greater than 1Ω, thereby avoiding the accumulation of static charge on the surface of the transfer part 200. When the grounding of the transfer part 200 fails, the grounding resistance increases, resulting in the static charge on the surface of the transfer part 200 cannot be discharged in time, which can cause the static charge on the surface of the transfer part 200 to continue to accumulate, and U1 continues to increase until it exceeds the first threshold range. At this time, the monitoring part issues a shutdown alarm command to further ensure the safety of the product 100.

[0065] In addition, when the working environment of the transfer unit 200 is an atmospheric environment with a low cleanliness level requirement, the static charge in the atmosphere may accumulate due to the friction between particles such as dust. After accumulating to a certain extent, it may also cause damage to the product 100. Therefore, in this embodiment, the accumulated voltage monitoring method further includes:

[0066] Detect the accumulated voltage of static charge in the atmosphere of the working environment, where the accumulated voltage in the atmosphere is denoted as U2;

[0067] Transmit U2 to the monitoring unit, and the monitoring unit determines whether U2 exceeds the second threshold range;

[0068] If U2 exceeds the second threshold range, stop the machine and give an alarm for processing.

[0069] It can be understood that during the process of the transfer unit 200 transferring the product 100, as the static charge continuously accumulates, U2 continuously increases. When U2 exceeds the second threshold range, the generated accumulated voltage is likely to damage the product 100. The monitoring unit can monitor U2 in real time, so as to avoid generating too large an accumulated voltage in the atmospheric environment, and further ensure the safety performance of the product 100.

[0070] Furthermore, the accumulated voltage monitoring method further includes:

[0071] Use the ion generator 4 to emit positive and negative ion airflows into the working environment;

[0072] The ion generator 4 is electrically connected to the monitoring unit, and the monitoring unit controls the output amount of the positive and negative ion airflows based on U2 to dynamically adjust the accumulated voltage in the atmosphere and make it within the second threshold range.

[0073] It can be understood that during the transfer of the product 100, the ion generator 4 emits positive and negative ion airflows into the working environment. The positive and negative ion airflows can respectively neutralize the positive and negative static charges in the atmospheric environment, so as to quickly suppress the accumulated voltage in the atmospheric environment below 5V (or 3V) to ensure the safety performance of the product 100.

[0074] Based on the above, please refer to Figure 2 , in this embodiment, an accumulated voltage monitoring device is also proposed, which includes a first detection unit 1 and a monitoring unit. The first detection unit 1 is electrically connected to the transfer unit 200 and is used to detect the amount of static charge on the surface of the transfer unit 200; the monitoring unit is electrically connected to the first detection unit 1, and the monitoring unit is configured to determine whether the accumulated voltage on the surface of the transfer unit 200 is within the first threshold range based on the amount of static charge on the surface of the transfer unit 200. If U1 exceeds the first threshold range, stop the machine and give an alarm for processing.

[0075] It can be understood that during the transfer process of the product 100, the first detection unit 1 can detect the amount of static charge on the surface of the transfer unit 200 and feedback it to the monitoring unit. The monitoring unit can calculate the accumulated voltage of the static charge on the surface of the transfer unit 200 to obtain U1. When U1 exceeds the first threshold range, the monitoring unit issues an alarm and shuts down the transfer unit 200. With such a setting, the accumulated voltage in the working environment can be monitored in real time, thus ensuring the safety of the chip during the transfer process.

[0076] Among them, the first detection unit 1 has a positive connection end and a negative connection end, and both the positive connection end and the negative connection end are connected to the outer surface of the transfer unit 200 to form a detection circuit. It can be understood that after the first detection unit 1 and the transfer unit 200 form a detection circuit, they can be electrically connected to the monitoring unit, so as to feedback U1 to the monitoring unit in real time, thereby ensuring the real-time monitoring of the static charge in the working environment and ensuring the safety of the chip during the transfer process. Among them, the first detection unit 1 is preferably an electrostatic detector in the prior art, and the positive connection end and the negative connection end of the electrostatic detector can be connected to the transfer unit 200 by spot welding.

[0077] In practical applications, the monitoring unit includes a communication board, a communication module, and a host computer. The resistance detection component and the electrostatic detection component are both connected to the communication board. The communication board has a communication function. Then the communication board and the communication module are connected, and finally the communication module and the host computer are connected. With such a setting, it is convenient for the operator to perform real-time monitoring through the UI interface of the host computer.

[0078] In some other feasible embodiments, when the transfer unit 200 has multiple transfer ends for transferring the product 100 and / or there are multiple transfer units 200, taking the transfer unit 200 having multiple transfer ends as an example for illustration, the transfer unit 200 is a matrix suction nozzle module, which includes a three-axis drive module and multiple suction nozzles for adsorbing the product 100. The multiple suction nozzles are arranged in an array on the drive end of the three-axis drive module. The three-axis drive module is used to drive the multiple suction nozzles to move in the XYZ directions. Multiple first detection units 1 are provided, and the multiple first detection units 1 are arranged in one-to-one correspondence with the multiple suction nozzles to respectively detect the static charge attached to the surface of each suction nozzle, so as to facilitate the operator to perform real-time monitoring of each suction nozzle through the UI interface of the host computer, and further facilitate the rapid positioning of abnormal suction nozzles, that is, it is convenient for the maintenance of the transfer unit 200 and the real-time positioning of problems.

[0079] In this embodiment, the transfer part 200 has conductive properties, and the accumulated voltage monitoring device also includes a grounding wire and a second detection part 2, the grounding wire is connected to the transfer part 200, and constitutes a grounding circuit; the second detection part 2 is connected in series to the grounding circuit and electrically connected to the monitoring part, and the second detection part 2 is configured to detect the grounding resistance of the transfer part 200. It can be understood that under the action of the grounding wire, the transfer part 200 can be placed in a grounded state, that is, under the action of the grounding wire, the amount of charge attached to the surface of the transfer part 200 can be derived, so that the accumulation of static charge on the surface of the transfer part 200 can be avoided. When the transfer part 200 is in a grounded state, the grounding resistance is not greater than 1Ω, so that the accumulation of static charge on the surface of the transfer part 200 can be avoided. When the grounding of the transfer part 200 fails, the grounding resistance increases. After a long time, the static charge on the surface of the transfer part 200 cannot be derived in time, so that the static charge on the surface of the transfer part 200 can be accumulated continuously, which further helps the monitoring part to determine whether U1 is in the first threshold range. The second detection part 2 is preferably a resistance detector in the prior art.

[0080] Among them, if the grounding resistance detected by the second detection part 2 exceeds 1Ω, U1 detected by the first detection part 1 is in the first threshold range in a short time, and exceeds the first threshold range after a long time, it is possible that the grounding wire is aged and has poor contact. If U1 detected by the first detection part 1 exceeds the first threshold range, and the grounding resistance detected by the second detection part 2 is not greater than 1Ω, it is possible that the material properties of the transfer part 200 are damaged. Such a setting helps the operator to further quickly locate the abnormality.

[0081] In actual applications, the transfer part 200 is provided with multiple suction nozzles, and the multiple suction nozzles are respectively connected to grounding wires, and both ends of each grounding wire are connected to the suction nozzle and the communication board respectively. The second detection part 2 is located between the suction nozzle and the communication board, wherein the communication board is a grounded communication board, which has both grounding and communication functions.

[0082] In this embodiment, please refer to Figure 3 The accumulated voltage monitoring device also includes a third detection unit 3, which is configured to detect the accumulated voltage of static charge in the atmosphere in the working environment, wherein the accumulated voltage in the atmosphere is recorded as U2; the third detection unit 3 is electrically connected to the monitoring unit, and the monitoring unit is also configured to determine whether U2 exceeds a second threshold range. If U2 exceeds the second threshold range, the shutdown alarm is processed.

[0083] It is understandable that, during the process of transferring the product 100, as the static charge accumulates, U2 detected by the third detection unit 3 increases continuously, and when U2 exceeds the second threshold range, the monitoring unit can issue a shutdown alarm. The third detection unit 3 is an electrostatic induction sensor in the prior art.

[0084] Further, please refer to Figure 4 and Figure 5 , the accumulated voltage monitoring device further includes an ion generator 4 and an ion controller. The ion generator 4 is disposed in the working environment and is configured to emit positive and negative ion airflows into the working environment; the ion controller is electrically connected to the ion generator 4; the ion generator 4 is preferably an ion air bar in the prior art.

[0085] The ion controller is electrically connected to the monitoring unit, and the monitoring unit is further configured to control the output amount of the positive and negative ion airflows based on U2 through the ion controller to dynamically adjust the accumulated voltage in the atmosphere and make it within the second threshold range. It can be understood that the third sensor is disposed in the static elimination area of the ion generator 4 and can detect the accumulated voltage in the area. Based on the U2 value detected by the third detection unit 3, the host computer can control the output amount of the positive and negative ion airflows through the ion controller to dynamically adjust the accumulated voltage in the atmosphere.

[0086] In practical applications, the ion controller communicates with the host computer through the RS232 communication protocol, and can detect and adjust the accumulated voltage level in the working environment in real time online to keep it within the second threshold range.

[0087] In addition, please refer to Figure 6 , a plurality of ion generators 4 are provided, and the ion emission ranges of two adjacent ion generators 4 have an overlapping area of 10% to 50%. With this setting, the occurrence of static elimination dead angles can be avoided, thereby further ensuring the safety performance of the product 100 during the transfer process.

[0088] Based on the above, a translation type test and sorting machine is further proposed in this embodiment, which includes a transfer unit 200 and the accumulated voltage monitoring device as described above. The transfer unit 200 is used to transfer the product 100, and the accumulated voltage monitoring device is used to monitor the accumulated voltage in the working environment where the transfer unit 200 is located. It can be understood that when the translation type test and sorting machine tests and classifies products 100 such as electrostatic sensitive chips, the transfer unit 200 can drive the product 100 to transfer between different workstations. Under the action of the accumulated voltage monitoring device, it is possible to monitor the accumulated voltage in the working environment of the transfer unit 200, thereby ensuring the safety of the product 100 during the transfer process.

[0089] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. A method for monitoring accumulated voltage, for monitoring accumulated voltage in a working environment of a transfer unit (200), wherein the transfer unit (200) is used to transfer a product (100), characterized in that: include: Detecting the amount of static charge on the surface of the transport unit (200) and feeding it back to the monitoring unit; The monitoring unit determines whether the accumulated voltage on the surface of the transfer unit (200) is within a first threshold range based on the amount of static charge on the surface of the transfer unit (200), wherein the accumulated voltage on the surface of the transfer unit (200) is recorded as U1; If U1 exceeds the first threshold range, the machine will be shut down and an alarm will be issued.

2. The accumulated voltage monitoring method according to claim 1, characterized in that: The transfer part (200) has conductive properties; The accumulated voltage monitoring method further comprises: Connecting the transfer part (200) to a grounding wire to form a grounding circuit; Detecting the grounding resistance of the transfer unit (200) and feeding it back to the monitoring unit; The monitoring unit determines whether the U1 is within the first threshold range based on the resistance value of the ground resistor.

3. The accumulated voltage monitoring method according to claim 1, characterized in that: The accumulated voltage monitoring method further comprises: Detecting the accumulated voltage of static charge in the atmosphere of the working environment, wherein the accumulated voltage of static charge in the atmosphere is recorded as U2; transmitting the U2 to the monitoring unit, and determining by the monitoring unit whether the U2 exceeds a second threshold range; If U2 exceeds the second threshold range, the machine will be shut down and an alarm will be issued.

4. The accumulated voltage monitoring method according to claim 3, characterized in that: The accumulated voltage monitoring method further comprises: An ion generator (4) is used to emit positive and negative ion airflows into the working environment; The ion generator (4) is electrically connected to the monitoring unit, and the monitoring unit controls the output of the positive and negative ion airflows based on U2 to dynamically adjust the accumulated voltage in the atmosphere and keep it within the second threshold range.

5. An accumulated voltage monitoring device, characterized in that: For implementing the accumulated voltage monitoring method according to any one of claims 1 to 4, the accumulated voltage monitoring device comprises: A first detection portion (1) is electrically connected to the transport portion (200) and is used to detect the amount of static charge on the surface of the transport portion (200); The monitoring unit is electrically connected to the first detection unit (1), and the monitoring unit is configured to determine whether the accumulated voltage on the surface of the transfer unit (200) is within a first threshold range based on the charge amount of the static charge on the surface of the transfer unit (200), and if U1 exceeds the first threshold range, the machine is shut down and an alarm is performed.

6. The accumulated voltage monitoring device according to claim 5, characterized in that: The first detection part (1) has a positive electrode connection end and a negative electrode connection end, and the positive electrode connection end and the negative electrode connection end are both connected to the outer surface of the transfer part (200) to form a detection circuit.

7. The accumulated voltage monitoring device according to claim 5, characterized in that: The transfer part (200) has conductive properties; The accumulated voltage monitoring device further comprises: A grounding wire connected to the transfer part (200) and forming a grounding circuit; The second detection unit (2) is connected in series to the grounding circuit and is electrically connected to the monitoring unit. The second detection unit (2) is configured to detect the grounding resistance of the transfer unit (200).

8. The accumulated voltage monitoring device according to claim 5, characterized in that: The accumulated voltage monitoring device further comprises a third detection unit (3), wherein the third detection unit (3) is configured to detect the accumulated voltage of static charge in the atmosphere of the working environment, wherein the accumulated voltage in the atmosphere is denoted as U2; The third detection unit (3) is electrically connected to the monitoring unit, and the monitoring unit is also configured to determine whether U2 exceeds a second threshold range. If U2 exceeds the second threshold range, the machine is shut down and an alarm is performed.

9. The accumulated voltage monitoring device according to claim 8, characterized in that: The accumulated voltage monitoring device further comprises an ion generator (4) and an ion controller, wherein the ion generator (4) is arranged in the working environment and is configured to emit positive and negative ion airflows into the working environment; the ion controller is electrically connected to the ion generator (4); The ion controller is electrically connected to the monitoring unit, and the monitoring unit is also configured to control the output of the positive and negative ion airflows based on U2 and through the ion controller to dynamically adjust the accumulated voltage in the atmosphere and keep it within the second threshold range.

10. The accumulated voltage monitoring device according to claim 9, characterized in that: A plurality of the ion generators (4) are provided, and the ion emission ranges of two adjacent ion generators (4) have an overlapping area of ​​10% to 50%.

11. A translational testing and sorting machine, characterized in that: It comprises a transfer part (200) and an accumulated voltage monitoring device as described in any one of claims 5 to 10, wherein the transfer part (200) is used for transferring products (100), and the accumulated voltage monitoring device is used for monitoring the accumulated voltage in the working environment of the transfer part (200).

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