Position sensor, transmission device, and position

Abstract

The invention discloses a position sensor, a conveying device and a position detection method. The position sensor comprises at least one power generation module and a voltage detection module. The power generation module comprises a rotating part, a fixed shaft, a connecting part, a rotor part and a stator part; the rotating part is arranged at one end of the fixed shaft, and the rotating part is used for rotating based on the movement of a to-be-detected target; one end of the connecting part is fixedly connected with the rotating part, and the other end of the connecting part is fixedly connected with the rotor part; the stator part is arranged around the rotor part, the stator part is electrically connected with the voltage detection module, and the voltage detection module is used for outputting a detection signal according to a voltage signal output by the stator part. According to the invention, the risk of position detection failure can be reduced, and the compatibility of the position sensor is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of position detection, and in particular to a position sensor, a transmission device and a position detection method. Background Art

[0002] Position detection plays an important role in the field of display panel preparation. For example, in the array washing stage, it is necessary to detect the conveying position of glass and the like.

[0003] In the related art, a swing sensor is used to detect the position of the target to be detected. However, the swing sensor has high requirements for magnetism, and weakening of magnetism will cause position detection failure. In addition, the swing sensor has strict requirements for the installation position and poor compatibility. Summary of the invention

[0004] The present invention provides a position sensor, a transmission device and a position detection method to reduce the risk of position detection failure and improve the compatibility of the position sensor.

[0005] According to one aspect of the present invention, there is provided a position sensor, the position sensor comprising: at least one power generation module and a voltage detection module;

[0006] The power generation module includes a rotating part, a fixed shaft, a connecting part, a rotor part, and a stator part;

[0007] The rotating part is arranged at one end of the fixed shaft, and the rotating part is used to rotate based on the movement of the target to be detected;

[0008] One end of the connecting portion is fixedly connected to the rotating portion, and the other end of the connecting portion is fixedly connected to the rotor portion;

[0009] The stator part is arranged around the rotor part, and the stator part is electrically connected to the voltage detection module. The voltage detection module is used to output a detection signal according to a voltage signal output by the stator part.

[0010] Optionally, the rotor part is sleeved on the periphery of the fixed shaft, and the rotor part includes at least two groups of magnetic pole groups arranged around the fixed shaft, and each group of magnetic pole groups includes an N pole and an S pole.

[0011] Optionally, the power generation module further comprises a fixing frame; the stator portion comprises k groups of coil windings; k≥5;

[0012] The fixing frame includes a base and k supporting parts; a limiting hole is provided at the center of the base, and the other end of the fixing shaft is fixed in the limiting hole, wherein the rotor part and the connecting part are between the rotating part and the base;

[0013] The k supporting parts are fixed to the edge of the base and are arranged on a side of the base close to the rotating part; the k coil windings correspond to the k supporting parts one by one, and the coil windings are fixed on the supporting parts.

[0014] Optionally, the voltage detection module includes a control unit and a switch unit, the first end of the coil winding is electrically connected to the first input end of the control unit, and the second end of the coil winding is electrically connected to the second input end of the control unit;

[0015] The first end of the switch unit is connected to a preset potential, and the second end of the switch unit is used to output the detection signal; the control unit is used to control the switch unit to be turned on or off according to the voltage between its first input end and the second input end.

[0016] Optionally, the connecting portion is a telescopic rod; and / or,

[0017] The power generation module further includes a bearing, wherein the bearing is fixed on the fixed shaft, and the rotating part is fixed on the bearing.

[0018] According to another aspect of the present invention, a conveying device is provided. The conveying device comprises the position sensor as described above and a conveying frame, wherein a plurality of conveying roller groups are arranged on the conveying frame.

[0019] Optionally, a plurality of side rollers are provided on both sides of the conveying frame, and at least one of the side rollers is reused as the rotating part of the position sensor.

[0020] Optionally, the plurality of side rollers include a side roller group, each of the side roller groups includes two side rollers located on both sides of the conveying frame, and the side roller group is parallel to the conveying roller group;

[0021] The side rollers in the same side roller group are reused as the rotating parts of different power generation modules in the same position sensor; the side rollers in different side roller groups are reused as the rotating parts of different position sensors.

[0022] Optionally, the conveying frame is further provided with a plurality of supporting rollers, and the supporting rollers are arranged between two adjacent groups of the conveying rollers; at least one of the supporting rollers is reused as the rotating part of the position sensor.

[0023] According to another aspect of the present invention, there is provided a position detection method, which is applied to the conveying device as described above, and the position detection method comprises:

[0024] Acquiring the detection signal of the voltage detection module of each position sensor;

[0025] The position of the target to be detected is determined according to the detection signal output by the voltage detection module.

[0026] According to the technical solution of the embodiment of the present invention, the position sensor uses a power generation module and a voltage detection module to realize position detection. Compared with the swing sensor, the requirement for magnetism is lower. When the magnetism is reduced due to long-term use, a large induced voltage can still be generated to realize position detection. And the position sensor only needs to be set on the moving path of the target to be detected, and the requirements for the installation environment are lower, and the compatibility is higher. In addition, the position sensor does not need to be powered from the outside during use, and the power generation module only converts mechanical energy into electrical energy to drive the voltage detection module, so it has a longer service life and more stable working performance.

[0027] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 A front view of a position sensor provided by an embodiment of the present invention;

[0030] Figure 2 A top view of a position sensor provided by an embodiment of the present invention;

[0031] Figure 3 A schematic diagram of a circuit structure of a position sensor provided by an embodiment of the present invention;

[0032] Figure 4 A top view of a conveying device provided by an embodiment of the present invention;

[0033] Figure 5 A front view of a conveying device provided by an embodiment of the present invention;

[0034] Figure 6 A top view of another conveying device provided by an embodiment of the present invention;

[0035] Figure 7 A flow chart of a position detection method provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0037] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0038] Figure 1 A front view of a position sensor provided by an embodiment of the present invention, Figure 2 A top view of a position sensor provided by an embodiment of the present invention, Figure 3 A schematic diagram of a circuit structure of a position sensor provided by an embodiment of the present invention, referring to Figures 1 to 3 The position sensor includes: at least one power generation module 1 and a voltage detection module 2; the power generation module 1 includes a rotating part 11, a fixed shaft 12, a connecting part 13, a rotor part 14 and a stator part 15; the rotating part 11 is arranged at one end of the fixed shaft 12, and the rotating part 11 is used to rotate based on the movement of the target to be detected; one end of the connecting part 13 is fixedly connected to the rotating part 11, and the other end of the connecting part 13 is fixedly connected to the rotor part 14; the stator part 15 is arranged around the rotor part 14, and the stator part 15 is electrically connected to the voltage detection module 2, and the voltage detection module 2 is used to output a detection signal according to the voltage signal output by the stator part 15.

[0039] Specifically, the position sensor can be applied in the preparation process of the display module, for example, in the array water washing stage in the preparation process of LCD (Liquid Crystal Display). The position of the target to be detected (such as glass or glass substrate, etc.) is detected in the array water washing stage. Each position sensor may include one power generation module 1, or may include at least two power generation modules 1. The power generation module 1 is arranged on the moving path of the target to be detected. When the position sensor includes at least two power generation modules 1, different power generation modules 1 can be arranged at different positions of the moving path of the target to be detected.

[0040] When the target to be detected passes through the power generation module 1, the target to be detected contacts the rotating part 11 in the power generation module 1, and friction is generated between the two. As the target to be detected moves, the rotating part 11 rotates. Since the connecting part 13 fixedly connects the rotating part 11 and the rotor part 14, when the rotating part 11 rotates, it will drive the connecting part 13 and the rotor part 14 to rotate. The rotor part 14 is a magnet, and the stator part 15 is a conductor. When the rotor part 14 rotates, the rotor part 14 and the stator part 15 produce an action of cutting magnetic flux lines, so that an induced voltage is generated on the stator part 15. The voltage detection module 2 can detect the induced voltage. If an induced voltage is detected, it indicates that the target to be detected passes through the power generation module 1. At this time, the voltage detection module 2 can output a detection signal of the first level, so that the position of the target to be detected can be determined according to the position of the power generation module 1. If the voltage detection module 2 does not detect the induced voltage, it indicates that the target to be detected has not yet arrived at or has passed the position of the power generation module 1. At this time, the voltage detection module 2 can output a detection signal of the second level. The first level and the second level are different in level, such as the first level is a high level and the second level is a low level; or the first level is a low level and the second level is a high level. In addition, in order to prevent the rotation of the rotating part 11 due to environmental interference from interfering with the accuracy of position detection, it can be set that when the induced voltage exceeds a set threshold, the voltage detection module outputs a detection signal of a first level, and when the induced voltage does not exceed the set threshold, the voltage detection module outputs a detection signal of a second level.

[0041] In summary, in this embodiment, the position sensor uses a power generation module and a voltage detection module to achieve position detection. Compared with the swing sensor, the requirements for magnetism are lower. When the magnetism is reduced after long-term use, a large induced voltage can still be generated to achieve position detection. And the position sensor only needs to be set on the moving path of the target to be detected, and the requirements for the installation environment are lower, and the compatibility is higher. In addition, the position sensor does not need to be powered by an external power supply during use. The power generation module only converts mechanical energy into electrical energy to drive the voltage detection module, so it has a longer service life and more stable working performance.

[0042] Optionally, refer to Figure 1 and Figure 2 The rotor part 14 is sleeved on the outer periphery of the fixed shaft 12 , and the rotor part 14 includes at least two groups of magnetic pole groups arranged around the fixed shaft 12 , and each group of magnetic pole groups includes an N pole 141 and an S pole 142 .

[0043] Specifically, the rotor part 14 includes a permanent magnet, for example, and the rotor part 14 may include a disc-shaped permanent magnet. The rotor part 14 has an opening in the center, so that the fixed shaft 12 passes through the opening. The permanent magnet includes at least two sets of magnetic poles, and this arrangement makes the magnetic field generated by the rotor part 14 stronger. When the rotation amplitude is small, the stator part 15 can still generate a large induced voltage, so that the detection sensitivity of the position sensor is higher.

[0044] In addition, optionally, the rotor portion 14 includes a shell, and the disc-shaped permanent magnet is arranged in the shell. And the connecting portion 13 is fixedly connected to the shell. The shell can select corresponding materials according to the environment in which the position sensor is used to protect the permanent magnet and further improve the service life of the position sensor. For example, when the position sensor is used in an acidic or alkaline liquid environment, the shell is correspondingly made of acid corrosion resistant material or alkaline corrosion resistant material.

[0045] It should be noted that Figure 1 and Figure 2 In the example, the rotor portion 14 includes two magnetic pole groups. In other embodiments, three or more magnetic pole groups may be included. In addition, different magnetic pole groups may be directly connected or have gaps between them. All magnetic pole groups are evenly distributed in the rotation direction of the rotor portion 14.

[0046] Optionally, continue to refer to Figures 1 to 3 The power generation module 1 also includes a fixing frame 16, and the stator part 15 includes k groups of coil windings 151; k≥5; the fixing frame 16 includes a base 161 and k supporting parts 162; a limiting hole is provided at the center of the base 161, and the other end of the fixed shaft 12 is fixed in the limiting hole, wherein the rotor part 14 and the connecting part 13 are between the rotating part 11 and the base 161; the k supporting parts 162 are fixed to the edge of the base 161 and are arranged on the side of the base 161 close to the rotating part 11; the k coil windings 151 correspond to the k supporting parts 162 one by one, and the coil windings 151 are fixed on the supporting parts 162.

[0047] Specifically, the fixing frame 16 plays the role of fixing the fixed shaft 12 and the stator part 15 in the fixed position sensor. The base 161 also plays a supporting role. The base 161 can be disc-shaped, and k support parts 162 are evenly distributed on the edge of the base 161, that is, the angles between any two adjacent support parts 162 and the center line of the base 161 are equal. The structures of all support parts 162 can be the same, for example, including a first support member perpendicular to the base 161 and a second support member parallel to the base, the first support member and the base 161 are fixedly connected, the second support member is fixedly connected to the first support member, the first support member is used to support the second support member, and the coil winding 151 is sleeved on the second support member. In some embodiments, a limiter is also provided at one end of the second support member close to the stator part, and the limiter is used to prevent the coil winding from falling off the second support member. The base 161 and the support part 162 can be an integral structure, and can also be set to a corresponding acid-resistant or alkali-resistant insulating material according to the environment in which the position sensor is located.

[0048] In this embodiment, since the coil windings 151 are arranged on the support part 162 one by one, all the coil windings 151 are evenly distributed around the rotor part 16, and when the stator part and the rotor part rotate relative to each other, the induced voltage generated on each coil winding 151 is relatively close. The coil winding 151 can be a copper wire coil, and the winding direction of the coil is perpendicular to the direction of the coil winding pointing to the center of the rotor part, so that the electromagnetic induction ability is stronger. Of course, it can be understood that within the range allowed by the process error, it can be considered that the winding direction of the coil is perpendicular to the direction of the coil winding pointing to the center of the rotor part. In addition, since the rotation amplitude of the rotating part 11 may not be too large when the target to be detected passes through the position sensor, the induced voltage generated by a single coil winding may be small, so by setting at least 5 groups of coil windings, the total induced voltage is larger, it is easier to drive the voltage detection module 2, and further improve the detection sensitivity of the position sensor. In addition, in some embodiments, the coil winding can be coated with a layer of acid and alkali resistant wrapping material on the periphery, so as to protect the coil winding and reduce the risk of damage to the coil winding.

[0049] In some embodiments, optionally, reference Figure 3 The voltage detection module 2 includes a control unit 21 and a switch unit 22. The first end of the coil winding 151 is electrically connected to the first input end of the control unit 21, and the second end of the coil winding 151 is electrically connected to the second input end of the control unit 21; the first end Vin of the switch unit 22 is connected to a preset potential, and the second end Vout of the switch unit 22 is used to output a detection signal; the control unit 21 is used to control the switch unit 22 to be turned on or off according to the voltages of the first input end and the second input end.

[0050] Specifically, the control unit 22 is a controller powered by the coil winding 151. When the overall voltage generated by the multiple coil windings 151 can drive the control unit 22, the control unit 21 outputs a control signal, so that the switch unit 22 is turned on, and the preset potential is output by the second end Vout of the switch unit 22. The preset potential is, for example, a high level, that is, when the voltage generated by the coil winding 151 can drive the controller, the voltage detection module 2 outputs a high-level detection signal. When the coil winding 151 does not generate an electromotive force or generates a small electromotive force, the control unit 21 has no output, and the output can be considered to be a low level, or a pull-down resistor can be connected to the second end of the switch unit to pull the second end of the switch unit down to a low level. The preset voltage is greater than the voltage generated by the stator part, and the preset voltage is used to drive the subsequent control device, so that the small signal generated by the coil winding indirectly controls the control device that needs to be driven by a large signal, such as driving a PLC (Programmable Logic Controller). It should be noted that the PLC is connected to multiple position sensors, and the position of the target to be detected can be determined according to the state of each position sensor.

[0051] Optionally, in some embodiments, the connecting portion 13 is a telescopic rod. The rotating portion 11 can move along the length direction of the fixed shaft 12. This arrangement makes the height of the rotating portion 11 adjustable, and further makes it more compatible when detecting different targets to be detected; for example, when the position sensor is applied to some objects whose targets to be detected are step-shaped objects, the height of the rotating portion 11 can be adjusted so that the target to be detected can contact the rotating portion 11 when it moves.

[0052] Optionally, in some embodiments, the fixed shaft 12 may be made of a smooth and wear-resistant material, so that when the rotating part 11 rotates, there is less wear between the fixed shaft 12 .

[0053] Optionally, in some other embodiments, the power generation module 1 further includes a bearing 17, the bearing 17 is fixed on the fixed shaft 12, and the rotating part 11 is fixed on the bearing 17. This arrangement makes it easier for the rotating part 11 to rotate, and there is no wear between the rotating part 11 and the fixed shaft 12, which can further improve the service life of the position sensor.

[0054] In summary, in the position sensor of this embodiment, when the target to be detected passes through the position sensor, the rotating part 11 contacts the target to be detected, and the rotating part 11 rotates following the movement of the target to be detected. Subsequently, the rotating part 11 drives the connecting part 13 to rotate, and the connecting part 13 drives the rotor part 14 to rotate, so that the action of cutting the magnetic flux lines is generated between the rotor part 14 and the stator part 15. An induced voltage is generated on the stator part 15, so that the voltage detection module 2 outputs a detection signal of the first level. Based on the received detection signal of the first level, the PLC can determine that the target to be detected passes through the position sensor, and thus perform subsequent related operations according to the position of the target to be detected.

[0055] The present invention further provides a conveying device, which includes at least one position sensor as provided in any embodiment of the present invention and a conveying frame, on which a plurality of conveying roller groups are arranged.

[0056] Specifically, the conveying device is used to convey the target to be detected from the starting position to the end position. The conveying roller group on the conveying frame is used to convey the target to be detected along the moving path. The position sensor is set on the moving path of the target to be detected, so that the position of the target to be detected can be detected in real time to prevent the occurrence of the target to be detected from hitting the film.

[0057] Since the conveying device provided by the embodiment of the present invention includes the position sensor provided by any embodiment of the present invention, there is no need to provide a swing sensor, and thus it also has the same beneficial effects, which will not be described in detail here.

[0058] Optionally, Figure 4 A top view of a conveying device provided by an embodiment of the present invention, Figure 5 A front view of a conveying device provided by an embodiment of the present invention, referring to Figure 4 and Figure 5 A plurality of side rollers are disposed on both sides of the conveying frame 5, and at least one side roller is multiplexed as a rotating part 11 of a position sensor.

[0059] Specifically, a plurality of conveyor roller groups 3 are provided on the conveyor frame 5, and the conveyor roller groups 3 include a plurality of conveyor rollers 31. When the conveyor rollers 31 rotate, the target 4 to be detected moves along its moving path. The side rollers are used to limit the target 4 to be detected to prevent the moving direction of the target 4 to be detected from being offset. In this embodiment, at least one side roller is reused as the rotating part 11. With this arrangement, there is no need to set up an additional rotating part, and the position of the position sensor is the same as that of the side roller. Side rollers are provided on the conveyor frame, so the compatibility of the position sensor is also stronger.

[0060] Optionally, continue to refer to Figure 4 and Figure 5The multiple side rollers include a side roller group, each side roller group includes two side rollers located on both sides of the conveying frame 5, and the side roller group is parallel to the conveying roller group; the side rollers in the same side roller group are reused as the rotating parts of different power generation modules in the same position sensor; the side rollers in different side roller groups are reused as the rotating parts of different position sensors.

[0061] Specifically, in each side roller group, the line connecting the two side rollers is perpendicular to the moving direction of the target 4 to be detected, so one side roller group can correspond to a position coordinate of the target to be detected, that is, when the two side rollers in the same side roller group are reused as the rotating part, the position of the target to be detected is the same position, while different side roller groups correspond to different positions. In this embodiment, the side rollers in the same side roller group are the rotating parts of different power generation modules in the same position sensor, and each position sensor includes two power generation modules and a voltage detection module, that is, different side rollers in the same side roller group reuse a voltage detection module. When any side roller in the same side roller group rotates, the position sensor can detect the target to be detected, so that when one of the side rollers is damaged, the position of the target to be detected can still be detected, further improving the service life of the conveying device.

[0062] Optionally, Figure 6 A top view of another conveying device provided in an embodiment of the present invention, referring to Figure 6 The conveying frame 5 is also provided with a plurality of supporting rollers 8, and the supporting rollers 8 are arranged between two adjacent groups of conveying rollers 3; at least one supporting roller is reused as a rotating part of the position sensor.

[0063] Specifically, the distance between the two conveying roller groups 3 is relatively far. When one end of the target 4 to be detected is between the conveying roller groups, the edge warping phenomenon may occur due to lack of support, which may cause the target 4 to be detected to be unable to be normally conveyed to the terminal position. Therefore, a support roller is usually arranged between the two conveying roller groups 3. Unlike the conveying roller, the conveying roller is an active wheel, which is used to actively rotate to drive the target to be detected to move; while the support roller does not actively rotate, but plays the role of supporting the target 4 to be detected. When the target 4 to be detected passes through the support roller, the support roller will rotate with the movement of the target 4 to be detected. In this embodiment, the support roller is reused as the rotating part of the position sensor, and there is no need to set up an additional rotating part. The position of the position sensor is the same as that of the support roller. Side rollers will be arranged on the conveying frame, so the compatibility of the position sensor is also stronger.

[0064] The present invention also provides a position detection method, which is applied to the conveying device provided by any embodiment of the present invention, and the position detection method can be executed by a PLC. Figure 7 As shown, Figure 7A flow chart of a position detection method provided by an embodiment of the present invention, the position detection method comprising:

[0065] Step S110, acquiring a detection signal of a voltage detection module of each position sensor;

[0066] Step S120, determining the position of the target to be detected according to the detection signal output by the voltage detection module.

[0067] Specifically, the PLC monitors the detection signals output by each position sensor in real time. When the detection signal is at the first level, it indicates that the position sensor has a target to be detected passing by; when the detection signal is at the second level, it indicates that there is no target to be detected at the position sensor. Therefore, the position of the target to be detected can be determined in real time based on the detection signals corresponding to each position sensor. The position detection method adopted in this embodiment can detect the position of the target to be detected more accurately.

[0068] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0069] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A position sensor, characterized in that: The position sensor comprises: at least one power generation module and a voltage detection module; The power generation module includes a rotating part, a fixed shaft, a connecting part, a rotor part, and a stator part; The rotating part is arranged at one end of the fixed shaft, and the rotating part is used to rotate based on the movement of the target to be detected; One end of the connecting portion is fixedly connected to the rotating portion, and the other end of the connecting portion is fixedly connected to the rotor portion; The stator part is arranged around the rotor part, and the stator part is electrically connected to the voltage detection module. The voltage detection module is used to output a detection signal according to a voltage signal output by the stator part.

2. The position sensor according to claim 1, characterized in that: The rotor part is sleeved on the outer periphery of the fixed shaft, and the rotor part includes at least two groups of magnetic pole groups arranged around the fixed shaft, and each group of magnetic pole groups includes an N pole and an S pole.

3. The position sensor according to claim 1, characterized in that: The power generation module further includes a fixing frame; the stator portion includes k groups of coil windings; k≥5; The fixing frame includes a base and k supporting parts; a limiting hole is provided at the center of the base, and the other end of the fixing shaft is fixed in the limiting hole, wherein the rotor part and the connecting part are between the rotating part and the base; The k supporting parts are fixed to the edge of the base and are arranged on a side of the base close to the rotating part; the k coil windings correspond to the k supporting parts one by one, and the coil windings are fixed on the supporting parts.

4. The position sensor according to claim 3, characterized in that: The voltage detection module includes a control unit and a switch unit, the first end of the coil winding is electrically connected to the first input end of the control unit, and the second end of the coil winding is electrically connected to the second input end of the control unit; The first end of the switch unit is connected to a preset potential, and the second end of the switch unit is used to output the detection signal; the control unit is used to control the switch unit to be turned on or off according to the voltage between its first input end and the second input end.

5. The position sensor according to claim 1, characterized in that: The connecting portion is a telescopic rod; and / or, The power generation module further includes a bearing, wherein the bearing is fixed on the fixed shaft, and the rotating part is fixed on the bearing.

6. A conveying device, characterized in that: The conveying device comprises at least one position sensor as described in any one of claims 1 to 5 and a conveying frame, and a plurality of conveying roller groups are arranged on the conveying frame.

7. The conveying device according to claim 6, characterized in that A plurality of side rollers are arranged on both sides of the conveying frame, and at least one of the side rollers is reused as the rotating part of the position sensor.

8. The conveying device according to claim 7, characterized in that The plurality of side rollers include a side roller group, each of the side roller groups includes two side rollers located on both sides of the conveying frame, and the side roller group is parallel to the conveying roller group; The side rollers in the same side roller group are reused as the rotating parts of different power generation modules in the same position sensor; the side rollers in different side roller groups are reused as the rotating parts of different position sensors.

9. The conveying device according to claim 7, characterized in that The conveying frame is also provided with a plurality of supporting rollers, and the supporting rollers are arranged between two adjacent groups of the conveying rollers; at least one of the supporting rollers is reused as the rotating part of the position sensor.

10. A position detection method, applied to the conveying device according to any one of claims 7 to 9, characterized in that: The position detection method comprises: Acquiring the detection signal of the voltage detection module of each position sensor; The position of the target to be detected is determined according to the detection signal output by the voltage detection module.

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