A synchronizer displacement sensor using PCB technology

Abstract

This invention discloses a synchronizer displacement sensor based on PCB technology, mainly relating to the field of synchronous displacement sensor technology. It includes a stator, a rotor rotatably mounted within the stator, a coupling coil on one side of the rotor, a stator circuit board on the stator, a rotor circuit board on the rotor, a conversion gear mounted on one side of the rotor, a conversion rack below the conversion gear, a gear set fixedly connected to the rear side of the rotor, an angle disk rotatably mounted on one side of the gear set, a small bevel gear set between the angle disk and the gear set, a reduction gear assembly rotatably mounted perpendicular to the gear set, and a counting display assembly below the reduction gear assembly. This invention can accurately display changing angles.

Description

Technical Field

[0001] This invention relates to the field of synchronous displacement sensor technology, specifically to a synchronizer displacement sensor using PCB manufacturing process. Background Technology

[0002] A synchronizer is an electromagnetic induction multi-level position sensor widely used in industrial sectors, such as the automotive industry. During driving, drivers often need to adjust speeds according to different road speed limits. At high speeds, directly shifting gears via a gear lever can easily cause gear grinding, potentially leading to vehicle malfunctions and safety hazards. Therefore, synchronizers are often installed in the gearbox to prevent this. However, even the most precise mechanisms will wear down over time, requiring constant monitoring to prevent accidents. Displacement sensors are needed to detect the synchronizer's displacement during gear shifting, ensuring the movement corresponds to the correct shift. Currently, most synchronizers use electrical components to detect displacement parameters, but electrical components are highly susceptible to malfunctions due to external factors (temperature, impact) and internal factors (materials, current).

[0003] Therefore, this invention proposes a solution that allows mechanical sensors to be used temporarily even if problems occur later, and then repaired and replaced. During repair, the mechanical parameters of the synchronizer displacement can be observed to see if they correspond to the gear shift parameters, thus reducing the accident rate. This structure is designed according to the functional design requirements of a PCB process, and the synchronizer used in automobiles is a manual transmission lock-ring synchronizer. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] In view of the above-mentioned problems, the present invention provides a synchronizer displacement sensor using PCB technology, which combines mechanical and electrical methods. Taking a manual transmission lock-ring synchronizer as an example, the design is required to accurately express the displacement of the synchronizer caused by the shifting process in terms of angle and numbers, so as to facilitate backup use and easy observation and maintenance in case of failure. The lock-ring synchronizer is used as an example in the design. In the accompanying drawings of the present invention, only the mating sleeve parts that need to be used are shown. Therefore, the other lock rings, spline hubs, sliders, and locating pins are not shown.

[0006] (II) Technical Solution

[0007] To address the aforementioned technical problems, this invention provides a PCB-based synchronizer displacement sensor, comprising a stator, a rotor rotatably mounted within the stator, a coupling coil on one side of the rotor, and a stator circuit board on the other side, the stator circuit board being fixedly mounted on the stator. A rotor circuit board is also fixedly connected to the rotor. A conversion gear is fixedly mounted on the front side of the rotor, and a conversion rack is slidably mounted below the conversion gear, slidingly engaging with a commutator coupling sleeve. A gear set is fixedly connected to the rear side of the rotor, an angle disk rotatably mounted on one side of the gear set, a small bevel gear set between the angle disk and the gear set, and a reduction gear assembly rotatably mounted perpendicular to the gear set. A counting and display assembly is located below the reduction gear assembly.

[0008] Furthermore, the gear set includes a transmission pinion, which is fixedly mounted on the rotor. A transmission large gear is fixedly mounted on the rear side of the transmission pinion. The transmission large gear cooperates with a small bevel gear set, which has a set above and below the transmission large gear. The transmission pinion drives the reduction gear assembly to rotate.

[0009] Furthermore, the small bevel gear set includes two vertical gears arranged vertically and fixed together by a shaft. The upper vertical gear drives the angle disk to rotate, and the lower vertical gear engages with the transmission gear. An angle gear is fixedly installed on the angle disk, and an indicator arrow is provided on the angle disk. A scale is provided on the inner ring of the angle disk.

[0010] Furthermore, the reduction gear assembly includes a reduction gear, which engages with a transmission pinion. The reduction gear is fixedly connected to a reduction rod, which is fixedly connected to a large reduction gear. The large reduction gear engages with a small reduction gear, and the small reduction gear is fixedly connected to a counting pinion. The small reduction gear drives the counting pinion to rotate. The counting pinion drives the counting display assembly to display the angle.

[0011] Furthermore, the counting display component includes a tens digit counting wheel, a units digit counting wheel on one side of the tens digit counting wheel, and a decimal counting wheel on one side of the units digit counting wheel. The tens digit counting wheel, units digit counting wheel, and decimal counting wheel are coaxially rotatable and all have numbers on their surfaces. Multiple cylinders are evenly distributed around the circumference of one side of each of the tens digit counting wheel, units digit counting wheel, and decimal counting wheel. Two cylinders are distributed on the other side of each of the units digit counting wheel and decimal counting wheel. The multiple cylinders of the decimal counting wheel form a gear engagement with a counting pinion.

[0012] Furthermore, a first carry-in wheel is rotatably provided below the tens digit counting wheel and the units digit counting wheel, and a second carry-in wheel is rotatably provided below the units digit counting wheel and the decimal counting wheel; the first carry-in wheel and the second carry-in wheel have the same structure; four small toothed structures are evenly arranged on the circumference of the first carry-in wheel, multiple cylinders on the tens digit counting wheel cooperate with the small toothed structures of the first carry-in wheel, two cylinders on the units digit counting wheel cooperate with the small toothed structures on the first carry-in wheel, the small toothed structures on the second carry-in wheel cooperate with the multiple cylinders on the units digit counting wheel, and the small gear structure on the second carry-in wheel cooperates with the two cylinders on the decimal counting wheel.

[0013] Furthermore, coils are provided on both the rotor and the stator. The rotor coils and stator coils are used to induce an AC signal that corresponds to the current rotation angle. This AC signal is then input to the synchronizer calculation circuit through wires for angle calculation.

[0014] Furthermore, the coupling coil transmits the induced signal, coupling the signal induced by the rotor coil to the stator coil to achieve continuous rotation of the angle measurement system.

[0015] Furthermore, the synchronizer calculation circuit performs angle calculation on the AC signal induced by the synchronizer body and then transmits it to the main control system.

[0016] Furthermore, the rotor coil and stator coil are processed using PCB copper foil etching technology.

[0017] The beneficial effects of this invention compared to existing technologies are as follows: 1. This invention includes a stator, rotor, coupling coil, stator circuit board, rotor circuit board, conversion gear, conversion rack, and automotive commutator coupling sleeve. Firstly, the commutation angle of the vehicle can be determined using electrical principles. Furthermore, the rotor and stator coils of this invention utilize PCB copper foil etching technology. The excitation coil can be etched onto the PCB rotor substrate through a winding design, saving the workload of traditional excitation coil winding. The 360-pole number-pair coil is designed on a single layer of copper foil on the PCB stator. When applied to the PCB rotor… When an excitation signal is applied, an alternating electromagnetic field is generated, and the PCB stator coil windings will induce an alternating current that is related to the current rotation angle. The PCB etching process also offers the advantages of simple processing and low cost. 2. The coupling steel ring enables continuous rotation of the angle sensor. A certain number of copper wires of varying thickness need to be wound around the coupling steel ring to facilitate the complete transmission of the rotor-induced signal to the PCB stator. Simultaneously, the coupling steel ring is designed to be placed in the inner ring position to avoid crosstalk between surrounding magnetic signals, which would affect signal quality. 3. The synchronizer calculation circuit in this invention includes an excitation... The magnetic generation circuit, preamplifier circuit, AD conversion circuit, and DSP calculation circuit are designed on the back of the synchronizer calculation circuit. This greatly reduces the space size and production cost of the displacement sensor. The AC signal induced by the PCB stator can be directly transmitted to the calculation circuit through internal markings. To avoid interference between the AC signal and the electromagnetic induction signal of the coupling steel ring, a twisted-pair magnetic shielding design is added to the wiring, effectively enhancing the anti-interference performance of the induced signal. The ultimate goal of these features is to improve the accuracy of the synchronizer displacement sensor, enabling more accurate angle value display. 4. This invention also includes a gear set, angle disk, reduction assembly, and counting display assembly. The gear set transmits the conversion angle to the angle disk, simultaneously driving the angle disk to rotate. The angle disk indicates the changing angle. Driven by the reduction assembly, the counting display assembly displays the numerical value, accurately showing the reversing angle. The coordinated use of these mechanical components allows for mechanical display of the reversing angle. When electrical problems occur, mechanical means can be used as a substitute, ensuring vehicle safety. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the back of the present invention.

[0020] Figure 3 This is a front view of the present invention.

[0021] Figure 4 for Figure 3 Sectional view at point AA.

[0022] Figure 5 This is the right view of the present invention.

[0023] Figure 6 for Figure 5 Sectional view at point BB.

[0024] Figure 7 This is a partial first angle schematic diagram of the present invention.

[0025] Figure 8 This is a partial second-angle schematic diagram of the present invention.

[0026] Figure 9 This is a schematic diagram of the system flow when the present invention is used in an electrical manner.

[0027] Figure 10 This is a circuit diagram of the rotor coil of the present invention.

[0028] Figure 11 This is a circuit diagram of the stator coil of the present invention.

[0029] Reference numerals in the figures: 1-Sensor mechanism; 101-Housing shell; 102-Annular shell; 103-Angle disk; 104-Display port; 105-Stator; 106-Converter gear; 107-Converter rack; 108-Slide seat; 109-Automotive commutator coupling sleeve; 110-Coupled coil; 111-Rotor; 112-Rotor circuit board; 113-Stator circuit board; 114-Large transmission gear; 115-Vertical gear; 116-Angle gear; 117-Reduction gear; 118-Small transmission gear; 119-Extension plate; 120-Reduction lever; 121-Large reduction gear; 122-Small counting gear; 123-Small reduction gear; 124-Tens digit counting wheel; 125-Units digit counting wheel; 126-First round of counting carry; 127-Second round of counting carry; 128-Fixed shaft; 129-Decimal counting wheel. Detailed Implementation

[0030] The present invention will be further described below with reference to specific embodiments. The invention is explained through illustrative embodiments and descriptions, but is not intended to limit the invention.

[0031] Example 1: As Figures 1-8 The synchronizer displacement sensor shown in the diagram, manufactured using PCB technology, includes a sensor mechanism 1. The sensor mechanism 1 includes a housing 101, which has three display ports 104 for viewing angle digits, such as... Figure 1As shown, a dot is provided between the second and third display ports 104 from the left. This dot represents the decimal point. The first display port 104 from the left displays the tens digit, the second display port 104 displays the ones digit, and the third display port 104 displays the last digit of the decimal point. An annular shell 102 is also fixedly installed on the outer casing 101, and a stator 105 is fixedly connected to the annular shell 102.

[0032] Extension plates 119 are fixedly installed on both sides of the outer casing 101, and the extension plates 119 provide space for the rotation of the large reduction gear 121.

[0033] A rotor 111 is rotatably mounted inside the stator 105. A coupling coil 110 is provided on one side of the rotor 111, and a stator circuit board 113 is provided on the other side. The stator circuit board 113 is fixedly mounted on the stator 105, and a rotor circuit board 112 is also fixedly connected to the rotor 111.

[0034] A conversion gear 106 is fixedly installed on the front side of the rotor 111. A conversion rack 107 is slidably arranged below the conversion gear 106. The conversion rack 107 is provided with a sliding groove. The conversion rack 107 is slidably installed on the slide seat 108 by means of the sliding groove. The slide seat 108 is fixedly installed on the stator 105. The conversion rack 107 is slidably engaged with the commutator coupling sleeve 109. The commutator coupling sleeve 109 is a commutation device installed in the machine. The machine can be the rotation of a car, or the steering of other devices or machines.

[0035] The gear set includes a small transmission gear 118, which is fixedly mounted on the rotor 111. A large transmission gear 114 is fixedly mounted on the rear side of the small transmission gear 118. The small transmission gear 118 and the large transmission gear 114 are coaxially fixedly connected to the rotor 111. The large transmission gear 114 cooperates with a small bevel gear set, which has one set above and one below the large transmission gear 114. The small transmission gear 118 drives the reduction gear assembly to rotate.

[0036] The small bevel gear set includes two vertical gears 115, which are arranged vertically and fixed together by a shaft. The shaft is rotatably mounted on the annular housing 102. The upper vertical gear 115 drives the angle disk 103 to rotate, and the lower vertical gear 115 forms a gear engagement with the transmission gear 114. An angle gear 116 is fixedly mounted on the angle disk 103, and the angle gear 116 forms a gear engagement with the upper vertical gear 115. The angle disk 103 is provided with an indicator arrow, and the inner ring of the angle disk 103, located on the annular housing 102, is provided with a scale. The indicator arrow can indicate the angle.

[0037] The reduction gear assembly includes a reduction gear 117, which is geared to a transmission pinion 118. The reduction gear 117 is fixedly connected to a reduction rod 120, which is rotatably mounted on the housing 101. The reduction rod 120 is fixedly connected to a large reduction gear 121, which is geared to a small reduction gear 123. The small reduction gear 123 is rotatably mounted on the housing 101 via a shaft. The small reduction gear 123 is fixedly connected to a counting pinion 122, which drives the counting pinion 122 to rotate. The counting pinion 122 drives the counting display assembly to display the angle.

[0038] The counting display component includes a tens digit counting wheel 124, a units digit counting wheel 125 on one side of the tens digit counting wheel 124, and a decimal counting wheel 129 on one side of the units digit counting wheel 125. The tens digit counting wheel 124, units digit counting wheel 125, and decimal counting wheel 129 are coaxially arranged and rotate, and each has numbers on its surface. Each side of the tens digit counting wheel 124, units digit counting wheel 125, and decimal counting wheel 129 has multiple cylinders evenly arranged around its circumference, and the other side of each units digit counting wheel 125 and decimal counting wheel 129 has two cylinders. The multiple cylinders of the decimal counting wheel 129 form a gear engagement with the counting pinion 122.

[0039] Below the tens digit counting wheel 124 and the units digit counting wheel 125, a first carry-in wheel 126 is rotatably mounted; below the units digit counting wheel 125 and the decimal counting wheel 129, a second carry-in wheel 127 is rotatably mounted. The first carry-in wheel 126 and the second carry-in wheel 127 have the same structure. Both the first carry-in wheel 126 and the second carry-in wheel 127 are rotatably mounted on a fixed shaft 128 fixedly mounted on the outer casing 101. The upper circle of the first carry-in wheel 126... The wheel is evenly equipped with four small toothed structures. The multiple cylinders on the tens digit counting wheel 124 cooperate with the small toothed structure on the first wheel 126 for counting and carrying. The two cylinders on the units digit counting wheel 125 cooperate with the small toothed structure on the first wheel 126 for counting and carrying. The small toothed structure on the second wheel 127 for counting and carrying cooperates with the multiple cylinders on the units digit counting wheel 125. The small gear structure on the second wheel 127 for counting and carrying cooperates with the two cylinders on the decimal counting wheel 129.

[0040] Example 2: The rotor 111 and stator 105 are used to sense an AC signal that corresponds to the current rotation angle. This AC signal is input to the rotor circuit board 112 through wires for angle calculation.

[0041] Both the rotor 111 and the stator 105 of the present invention are provided with coils. The coils are not shown in the accompanying drawings, but according to the principle of electronic devices, the above-mentioned parts have coils. In the working principle of another usage of the present invention, the presence of coils is used as an example. PCB rotor coil, PCB stator coil, or rotor coil and stator coil are just different names. PCB rotor is rotor 111 and PCB stator is stator 105.

[0042] The coupling coil 110 transmits the induced signal, coupling the signal induced by the rotor 111 coil to the stator 105 coil, thereby realizing the continuous rotation of the angle measurement system.

[0043] The synchronizer calculation circuit calculates the angle of the AC signal induced by the synchronizer body and then transmits it to the main control system.

[0044] The rotor 111 coil and stator 105 coil are processed using PCB copper foil engraving technology. The excitation coil can be engraved on the PCB rotor through a winding design, which can save the workload of traditional excitation coil winding. The 360-pole pair coil is designed on a single layer of copper foil on the PCB stator. When an excitation signal is applied to the PCB rotor, an alternating electromagnetic field is generated, and the PCB stator coil winding will induce an alternating current that is related to the current rotation angle.

[0045] A certain number of copper wires of a certain thickness need to be wound around the coupling steel ring to facilitate the complete transmission of the signal induced by the rotor to the PCB stator. At the same time, the coupling steel ring needs to be placed in the inner ring position to avoid crosstalk between surrounding magnetic signals, which would affect the signal quality.

[0046] The synchronizer calculation circuit includes an excitation generation circuit, a preamplifier circuit, an AD conversion circuit, and a DSP calculation circuit. By designing the hardware circuit of the synchronizer calculation circuit on the back of the PCB stator substrate, the space size and production cost of the displacement sensor can be greatly reduced. At this time, the AC signal induced by the PCB stator can be directly transmitted to the calculation circuit through internal scribe lines. In order to avoid mutual interference between the AC signal and the electromagnetic induction signal of the coupling steel ring, a twisted pair magnetic shielding design is added to its wiring design, which effectively enhances the anti-interference performance of the induced signal and improves the overall accuracy during use.

[0047] Working principle 2 of this invention: When the commutator coupling sleeve 109 of the car rotates, it will drive the conversion rack 107 to slide. The conversion rack 107 drives the conversion gear 106 to rotate, which in turn causes the rotor 111 to rotate. The PCB rotor 111 coil rotates and couples the generated electromagnetic signal to the stator 105 coil, thereby outputting a certain signal to the synchronizer calculation circuit, and finally displaying the current angle value.

[0048] The synchronizer calculation circuit generates an excitation signal, which is input to the rotor 111 coil through the wiring. At this time, the rotor 111 coil generates an alternating electromagnetic field. The alternating electromagnetic signal is coupled to the stator 105 coil through the coupling coil 110, thereby transmitting the signal to the stator 105 coil. The stator 105 induces an alternating current that is related to the current rotation angle. The generated alternating current is output to the synchronizer calculation circuit, thereby determining the current angle change.

[0049] Working principle of the invention 1: The entire device is a sensor. The conversion rack 107 is engaged with the car commutator coupling sleeve 109 on the car's gear shifter structure. When the car needs to shift gears while driving at high speed, the drive gear needs to be smoothly engaged through the commutator. After starting the shift, for example, the shift lever will push the conversion rack 107 to switch gears in the positive direction of the length direction. At this time, the required distance is generated. This distance is transmitted to the conversion gear 106 through the gear rack. The conversion gear 106 drives the rotor 111 to rotate. The transmission gear 114 and transmission gear 118 on the conversion gear 106 will rotate. The transmission gear 114 drives the vertical gear 115 to rotate. The vertical gear 115 meshes with the angle gear 116 to drive the angle disk 103 to rotate. The arrow on the angle disk 103 indicates the rotation angle.

[0050] The transmission pinion 118 meshes with the reduction gear 117, driving the reduction lever 120 and the large reduction gear 121 to rotate. The large reduction gear 121 drives the reduction pinion 123 and the counting pinion 122 to rotate together. Simultaneously, the counting pinion 122 drives the decimal counting wheel 129 to rotate. After the decimal counting wheel 129 rotates, it will display the units digit value. The two cylinders on the decimal counting wheel 129 will drive the second carry-in wheel 127 to rotate. The second carry-in wheel 127 drives the units digit counting wheel 125 to rotate, which displays the units digit value. After the units digit counting wheel 125 rotates, the two cylinders will drive the first carry-in wheel 126 to rotate. Simultaneously, the first carry-in wheel 126 drives the tens digit counting wheel 124 to rotate, which displays the tens digit value. At this point, the rotation angle can be determined. If more digits need to be displayed, counting plates and carry-in wheels can be added.

[0051] Any aspects not covered in this invention are applicable to existing technologies.

Claims

1. A synchronizer displacement sensor for a PCB process, comprising a stator (105), characterized in that, The stator (105) is provided with a rotor (111) rotating therein, the rotor (111) is provided with a coupling coil (110) on one side and a stator circuit board (113) on the other side, the stator circuit board (113) is fixedly installed on the stator (105), the rotor (111) is further fixedly connected with a rotor circuit board (112), the front side of the rotor (111) is fixedly installed with a conversion gear (106), the conversion gear (106) is slidingly provided with a conversion rack (107) below, the conversion rack (107) is in sliding fit with a car commutator combination sleeve (109), the rear side of the rotor (111) is fixedly connected with a gear set, the gear set is rotatably provided with a scale (103) on one side, the scale (103) and the gear set are provided with a small bevel gear set therebetween, a speed reduction gear assembly is rotatably provided in a direction perpendicular to the gear set, and a counting display assembly is provided below the speed reduction gear assembly. The gear set comprises a transmission pinion (118) fixedly installed on the rotor (111), and a transmission gear (114) fixedly installed on the rear side of the transmission pinion (118), the transmission gear (114) is matched with the small bevel gear set, and the small bevel gear set is provided with a set above and below the transmission gear (114); the transmission pinion (118) drives the speed reduction gear assembly to rotate; The small bevel gear set comprises two vertical direction gears (115) arranged in an up-down direction, the two vertical direction gears (115) are fixed by a shaft, the upper vertical direction gear (115) drives the scale (103) to rotate, and the lower vertical direction gear (115) is in gear fit with the transmission gear (114); the scale (103) is fixedly installed with an angle gear (116), the scale (103) is provided with an indicating arrow, and the inner ring of the scale (103) is provided with a scale disc; The speed reduction gear assembly comprises a speed reduction gear (117) in gear fit with the transmission pinion (118), the speed reduction gear (117) is fixedly connected with a speed reduction rod (120), the speed reduction rod (120) is fixedly connected with a speed reduction gear (121), the speed reduction gear (121) is in gear fit with a speed reduction pinion (123), the speed reduction pinion (123) is fixedly connected with a counting pinion (122), the counting pinion (122) rotates with the speed reduction pinion (123), and the counting pinion (122) drives the counting display assembly to display an angle.

2. A synchronizer displacement sensor for a PCB process according to claim 1, characterized in that The counting display component comprises a ten-counting rotating wheel (124), one side of the ten-counting rotating wheel (124) is provided with a unit-counting rotating wheel (125), one side of the unit-counting rotating wheel (125) is provided with a decimal-counting rotating wheel (129), the ten-counting rotating wheel (124), the unit-counting rotating wheel (125) and the decimal-counting rotating wheel (129) are coaxially arranged and are provided with numbers on surfaces thereof, a plurality of cylinders are uniformly arranged on one side of the ten-counting rotating wheel (124), the unit-counting rotating wheel (125) and the decimal-counting rotating wheel (129), two cylinders are arranged on the other side of the unit-counting rotating wheel (125) and the decimal-counting rotating wheel (129), and the plurality of cylinders of the decimal-counting rotating wheel (129) are in gear engagement with a counting pinion (122).

3. A synchronizer displacement sensor for a PCB process according to claim 2, wherein, The ten-counting rotating wheel (124) and the unit-counting rotating wheel (125) are rotatably provided with a counting carry-first wheel (126) below, the unit-counting rotating wheel (125) and the decimal-counting rotating wheel (129) are rotatably provided with a counting carry-second wheel (127) below, the counting carry-first wheel (126) and the counting carry-second wheel (127) are the same in structure, four small-toothed structures are uniformly arranged on the counting carry-first wheel (126), the plurality of cylinders of the ten-counting rotating wheel (124) are in engagement with the small-toothed structures of the counting carry-first wheel (126), the two cylinders of the unit-counting rotating wheel (125) are in engagement with the small-toothed structures of the counting carry-first wheel (126), the small-toothed structures of the counting carry-second wheel (127) are in engagement with the plurality of cylinders of the unit-counting rotating wheel (125), and the small-toothed structures of the counting carry-second wheel (127) are in engagement with the two cylinders of the decimal-counting rotating wheel (129).

4. The synchronizer displacement sensor of claim 1, wherein, The rotor (111) and the stator (105) are both provided with coils, the rotor (111) coil and the stator (105) coil are used for inducting an alternating current signal having a certain corresponding relationship with a current rotation angle, the alternating current signal is input to a resolver calculation circuit through a wire for angle calculation.

5. A synchronizer displacement sensor for a PCB process according to claim 4, wherein, The coupling coil (110) couples the signal inducted by the rotor (111) coil to the stator (105) coil, so that the angle measurement system can continuously rotate.

6. A synchronizer displacement sensor for a PCB process according to claim 5, wherein, The resolver calculation circuit calculates the angle of the alternating current signal inducted by the resolver body and then transmits the angle to a main control system.

7. A synchronizer displacement sensor for a PCB process according to claim 5, wherein, The rotor (111) coil and the stator (105) coil are processed by a PCB copper foil line-etching process.

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