Precise gyro sensor based on multi-resistance voltage division mapping

Abstract

The utility model discloses a precision gyro sensor based on multi-resistance voltage division mapping. The precision gyro sensor comprises a PCB, an outer ring electric brush mechanism and an inner ring electric brush mechanism, wherein the outer ring electric brush mechanism and the inner ring electric brush mechanism are electrically connected with each other; the PCB is provided with an outer ring brush pad group, an inner ring brush pad, a multi-resistance circuit, an operational amplifier follower circuit and a signal acquisition circuit; the outer ring electric brush mechanism is in contact with each outer ring electric brush bonding pad of the outer ring electric brush bonding pad group, and is electrically connected with the multi-resistance circuit through each outer ring electric brush bonding pad so as to obtain a resistance voltage division signal between each outer ring electric brush bonding pad and the multi-resistance circuit; the inner ring electric brush mechanism is used for obtaining the resistance voltage division signal through the outer ring electric brush mechanism; and the resistor voltage division signal is transmitted to the operational amplifier follower circuit through the inner ring electric brush bonding pad. According to the utility model, the orientation of more angle intervals can be obtained, the positioning accuracy and precision can be effectively improved, and the precision requirement on the gyroscope sensor at the present stage can be better met.

Description

Technical Field

[0001] The utility model relates to the field of gyro sensors, in particular to a precision gyro sensor based on multi-resistance voltage division mapping. Background Art

[0002] In order to accurately control flying products, gyro sensors are generally used to obtain flight attitude. Gyro sensors can measure the movement of flying products around three axes (roll, pitch, and yaw), more accurately measure and record the attitude information of flying products, and provide accurate data for the adjustment and control of flying products. With the continuous enrichment and development of flying products, the accuracy requirements for gyro sensors will become higher and higher. Therefore, how to improve the accuracy of gyro sensors is a technical problem that we must study.

[0003] The existing horizontal azimuth gyro sensor design uses 5 resistor voltage dividers to map the 360° azimuth angle, and can only obtain the azimuth in 5 angle intervals. Each angle interval represents an azimuth angle of 72°. The positioning is wide and inaccurate, and cannot meet the current accuracy requirements for gyro sensors. Utility Model Content

[0004] In view of this, the utility model provides a precision gyro sensor based on multi-resistance voltage division mapping to solve the problem that the existing gyro sensor has a small angle range obtained, resulting in inaccurate positioning and low positioning accuracy.

[0005] The utility model provides a precision gyro sensor based on multi-resistance voltage division mapping, comprising a PCB circuit board and an outer ring brush mechanism and an inner ring brush mechanism electrically connected to each other;

[0006] The PCB circuit board is provided with an outer circle brush pad group, an inner circle brush pad, a multi-resistance circuit, an operational amplifier follower circuit and a signal acquisition circuit;

[0007] Wherein, the outer circle brush pad group is composed of a plurality of outer circle brush pads, and the multi-resistance circuit is composed of a plurality of first resistors; the number of the outer circle brush pads and the number of the first resistors are both greater than 5;

[0008] The outer ring brush mechanism is used to contact each outer ring brush pad of the outer ring brush pad group during its own operation, and is electrically connected to the multi-resistance circuit through each outer ring brush pad to obtain the resistance voltage division signal between each outer ring brush pad and the multi-resistance circuit;

[0009] The inner circle brush mechanism is used to obtain the resistance voltage division signal through the outer circle brush mechanism during its own operation; and is in contact with the inner circle brush pad to transmit the resistance voltage division signal to the operational amplifier follower circuit through the inner circle brush pad;

[0010] The input end of the operational amplifier follower circuit is electrically connected to the inner circle brush pad, and is used to perform signal processing on the resistance voltage division signal transmitted by the inner circle brush pad;

[0011] The input end of the signal acquisition circuit is electrically connected to the output end of the operational amplifier follower circuit, and is used to acquire the resistor voltage division signal after signal processing.

[0012] Optionally, the outer circle brush pad group and the inner circle brush pad are both arranged on the first surface of the PCB circuit board, and the outer circle brush pad group is located outside the inner circle brush pad; the multi-resistance circuit, operational amplifier follower circuit and signal acquisition circuit are all arranged on the second surface of the PCB circuit board.

[0013] Optionally, the inner ring brush welding pad is in a circular ring shape;

[0014] The number of the outer ring brush pads is 179, and the 179 outer ring brush pads are uniformly arranged on the outer periphery of the inner ring brush pads in sequence to form an outer ring brush pad group in a circular shape;

[0015] Among them, the distance between the first outer ring brush pad and the 179th outer ring brush pad is greater than the distance between each other adjacent two outer ring brush pads.

[0016] Optionally, each of the outer ring brush pads is trapezoidal, and the first bottom edge of each of the outer ring brush pads close to the inner ring brush pad is parallel to the second bottom edge away from the inner ring brush pad, and in each of the outer ring brush pads, the length of the first bottom edge is less than the length of the second bottom edge.

[0017] Optionally, the size of the first outer ring brush pad and the size of the 179th outer ring brush pad are both smaller than the sizes of the remaining outer ring brush pads.

[0018] Optionally, the number of the first resistors is 180;

[0019] 180 of the first resistors are sequentially connected in series, and a first end of the circuit structure formed in series is electrically connected to a circuit power supply end, and a second end of the circuit structure formed in series is grounded;

[0020] In the outer ring brush pad group, the first outer ring brush pad is connected to the common connection end between the first first resistor and the second first resistor; the second outer ring brush pad is connected to the common connection end between the second first resistor and the third first resistor; the third outer ring brush pad is connected to the common connection end between the third first resistor and the fourth first resistor; and so on, for the i-th outer ring brush pad in the outer ring brush pad group, i satisfies 1≤i≤179, and the i-th outer ring brush pad is connected to the common connection end between the i-th first resistor and the i+1-th first resistor.

[0021] Optionally, the operational amplifier follower circuit includes an operational amplifier U1A, a second resistor R181, a first capacitor C1 and a second capacitor C2;

[0022] The positive power pin of the operational amplifier U1A is electrically connected to the circuit power supply end, the first end of the first capacitor C1 and the first end of the second capacitor C2 are both connected to the common connection end between the positive power pin of the operational amplifier U1A and the circuit power supply end, and the second end of the first capacitor C1 and the second end of the second capacitor C2 are both grounded; the negative power pin of the operational amplifier U1A is grounded; the positive phase input pin of the operational amplifier U1A is electrically connected to the inner circle brush pad, the first end of the second resistor R181 is connected to the common connection end between the positive phase input pin of the operational amplifier U1A and the inner circle brush pad, and the second end of the second resistor R181 is electrically connected to the output pin of the operational amplifier U1A; the inverting input pin of the operational amplifier U1A is electrically connected to the output pin of the operational amplifier U1A, and the output pin of the operational amplifier U1A is electrically connected to the input end of the signal acquisition circuit.

[0023] Optionally, the operational amplifier follower circuit further includes a third resistor R182;

[0024] The first end of the third resistor R182 is connected to the common connection end between the non-inverting input pin of the operational amplifier U1A and the inner circle brush pad, and the second end of the third resistor R182 is grounded.

[0025] Optionally, the outer ring brush mechanism includes an outer ring brush and a first drive assembly, and the inner ring brush mechanism includes an inner ring brush and a second drive assembly;

[0026] The first drive assembly is electrically connected to the outer ring brush, the second drive assembly is electrically connected to the inner ring brush, and the outer ring brush is electrically connected to the inner ring brush.

[0027] The beneficial effects of the utility model are as follows: during the operation of the outer ring brush mechanism and the inner ring brush mechanism, the outer ring brush mechanism can contact the outer ring brush pads in the outer ring brush pad group, and each outer ring brush pad is electrically connected to the multi-resistance circuit. Therefore, when the outer ring brush mechanism contacts an outer ring brush pad, a resistance voltage division signal between the outer ring brush pad in contact and the multi-resistance circuit can be obtained. Each time an outer ring brush pad is contacted, a corresponding resistance voltage division signal can be obtained, thereby realizing the mapping between the resistance voltage division signal and the resistance and the outer ring brush pad. The inner ring brush mechanism is directly electrically connected to the outer ring brush mechanism. And the inner circle brush mechanism is in contact with the inner circle brush pad, so the acquired resistance voltage division signal can be transmitted to the inner circle brush pad through the outer circle brush mechanism and the inner circle brush mechanism; finally, the resistance voltage division signal is processed and collected respectively through the operational amplifier follower circuit and the signal acquisition circuit which are electrically connected to the inner circle brush pad in sequence; wherein, the number of the outer circle brush pads and the number of the first resistors are both greater than 5, and more resistance voltage divisions can be used to map the 360° azimuth angle and obtain the azimuths in more angle ranges, which can effectively improve the accuracy and precision of positioning and better adapt to the current accuracy requirements for gyroscope sensors. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The features and advantages of the present invention will be more clearly understood by referring to the accompanying drawings, which are schematic and should not be construed as limiting the present invention in any way. In the accompanying drawings:

[0029] Figure 1 A structural diagram of a precision gyro sensor based on multi-resistance voltage division mapping in an embodiment of the utility model is shown;

[0030] Figure 2 The following is a layout diagram of the first side of a PCB circuit board in an embodiment of the present utility model;

[0031] Figure 3 The layout design diagram of the second side of the PCB circuit board in the embodiment of the utility model is shown;

[0032] Figure 4 It shows the layout design diagram of the outer ring brush pad group in the embodiment of the utility model;

[0033] Figure 5 The schematic diagram of the outer circle brush mechanism and the inner circle brush pad obtaining the resistance voltage division signal in the embodiment of the utility model is shown;

[0034] Figures 6A to 6C It shows the circuit design diagram of the multi-resistance circuit and the outer circle brush pad group in the embodiment of the utility model;

[0035] Figure 7 The circuit design diagram of the operational amplifier follower circuit in the embodiment of the utility model is shown.

[0036] Description of reference numerals:

[0037] 1. PCB circuit board, 11. outer circle brush pad group, 12. inner circle brush pad, 111. outer circle brush pad. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0039] Embodiment 1

[0040] like Figure 1 As shown, a precision gyro sensor based on multi-resistance voltage division mapping includes a PCB circuit board and an outer ring brush mechanism and an inner ring brush mechanism electrically connected to each other;

[0041] The PCB circuit board is provided with an outer circle brush pad group, an inner circle brush pad, a multi-resistance circuit, an operational amplifier follower circuit and a signal acquisition circuit;

[0042] Wherein, the outer circle brush pad group is composed of a plurality of outer circle brush pads, and the multi-resistance circuit is composed of a plurality of first resistors; the number of the outer circle brush pads and the number of the first resistors are both greater than 5;

[0043] The outer ring brush mechanism is used to contact each outer ring brush pad of the outer ring brush pad group during its own operation, and is electrically connected to the multi-resistance circuit through each outer ring brush pad to obtain the resistance voltage division signal between each outer ring brush pad and the multi-resistance circuit;

[0044] The inner circle brush mechanism is used to obtain the resistance voltage division signal through the outer circle brush mechanism during its own operation; and is in contact with the inner circle brush pad to transmit the resistance voltage division signal to the operational amplifier follower circuit through the inner circle brush pad;

[0045] The input end of the operational amplifier follower circuit is electrically connected to the inner circle brush pad, and is used to perform signal processing on the resistance voltage division signal transmitted by the inner circle brush pad;

[0046] The input end of the signal acquisition circuit is electrically connected to the output end of the operational amplifier follower circuit, and is used to acquire the resistor voltage division signal after signal processing.

[0047] In this embodiment, during the operation of the outer ring brush mechanism and the inner ring brush mechanism, the outer ring brush mechanism can contact the outer ring brush pads in the outer ring brush pad group, and each outer ring brush pad is electrically connected to the multi-resistance circuit. Therefore, when the outer ring brush mechanism contacts an outer ring brush pad, a resistance voltage division signal between the outer ring brush pad in contact and the multi-resistance circuit can be obtained. Each time an outer ring brush pad is contacted, a corresponding resistance voltage division signal can be obtained, thereby realizing the mapping between the resistance voltage division signal and the resistance and the outer ring brush pad; the inner ring brush mechanism is directly electrically connected to the outer ring brush mechanism, and the inner ring brush pad is electrically connected to the outer ring brush mechanism. The outer ring brush mechanism is in contact with the inner ring brush pad, so the acquired resistance voltage division signal can be transmitted to the inner ring brush pad through the outer ring brush mechanism and the inner ring brush mechanism; finally, the resistance voltage division signal is processed and collected respectively through the operational amplifier follower circuit and the signal acquisition circuit which are electrically connected to the inner ring brush pad in sequence; wherein, the number of the outer ring brush pads and the number of the first resistors are both greater than 5, more resistance voltage divisions can be used to map the 360° azimuth angle, and the azimuths in more angle ranges can be obtained, which can effectively improve the accuracy and precision of positioning, and better adapt to the current accuracy requirements for gyroscope sensors.

[0048] It should be understood that the present invention only improves the hardware structure of the gyro sensor to achieve higher accuracy and higher precision angle data acquisition and adapt to the use environment with high precision requirements, but does not involve computer level improvements. The computer programs involved in the gyro sensor are all conventional computer programs in the art.

[0049] The signal acquisition circuit of this embodiment may adopt a conventionally designed AD acquisition circuit, which is not limited here.

[0050] Preferably, if Figure 2 As shown, the outer circle brush pad group 11 and the inner circle brush pad 12 are both arranged on the first surface of the PCB circuit board 1, and the outer circle brush pad group 11 is located outside the inner circle brush pad 12; Figure 3 As shown, the multi-resistance circuit, the operational amplifier follower circuit and the signal acquisition circuit are all arranged on the second surface ( Figure 3 Only the layout of the electronic components in the multi-resistance circuit and the operational amplifier follower circuit is shown, and the layout of the signal acquisition circuit is not shown).

[0051] The layout of the above structure can make the first surface of the PCB circuit board form a flat structure, which is more convenient for the outer circle brush mechanism and the outer circle brush pad group to contact each other, and more convenient for the inner circle brush mechanism and the inner circle brush pad to contact each other, thereby better realizing the signal acquisition of multi-resistance voltage division mapping.

[0052] In this embodiment, the PCB circuit board refers to a Printed Circuit Board, which is a carrier used to carry the outer circle brush pad group, the inner circle brush pad, the multi-resistance circuit, the operational amplifier follower circuit and the electronic components in the signal acquisition circuit to achieve electrical connection.

[0053] Preferably, if Figure 2 As shown, the inner circle brush welding pad 12 is in a circular ring shape.

[0054] Correspondingly, if Figure 4 As shown, the number of the outer ring brush pads 111 is 179, and the 179 outer ring brush pads 111 are uniformly arranged on the inner ring brush pads 12 ( Figure 4 The outer periphery of the outer ring brush pad group 11 is formed in a circular ring shape;

[0055] Among them, the distance between the first outer ring brush pad 111 and the 179th outer ring brush pad 111 is greater than the distance between each other adjacent two outer ring brush pads 111.

[0056] Through the design of the inner ring brush pad and the outer ring brush pad, on the one hand, more outer ring brush pads (179 outer ring brush pads) can be set during the rotation of the inner and outer brushes, so that the outer ring brush mechanism contacts more outer ring brush pads, thereby obtaining more resistance voltage division signals (specifically 179 resistance voltage division signals); on the other hand, it can be more convenient for the inner ring brush pad to obtain the resistance voltage division signal, transmit more resistance voltage division signals to the subsequent circuit, obtain more angle ranges, and obtain a more precise gyroscope sensor.

[0057] Among them, 179 outer ring brush pads are uniformly arranged on the outer circumference of the inner ring brush pads in sequence, and the spacing between the first outer ring brush pad and the 179th outer ring brush pad is greater than the spacing between the other two adjacent outer ring brush pads. Since the entire circumference is 360°, Figure 4 As shown in the figure, 179 outer ring brush pads are arranged at intervals of 2° on the outer periphery of the inner ring brush pad, and the interval between the first outer ring brush pad and the 179th outer ring brush pad is 4°. Among them, the interval between the first outer ring brush pad and the 179th outer ring brush pad is relatively large, which can prevent the first outer ring brush pad and the 179th outer ring brush pad from being short-circuited when the outer ring brush mechanism falls between the first outer ring brush pad and the 179th outer ring brush pad.

[0058] Preferably, if Figure 4As shown, each of the outer circle brush pads 111 is trapezoidal, and the first bottom edge of each of the outer circle brush pads 111 close to the inner circle brush pad 12 is parallel to the second bottom edge away from the inner circle brush pad 12, and in each of the outer circle brush pads 111, the length of the first bottom edge is smaller than the length of the second bottom edge.

[0059] Through the shape design of the outer ring brush pad, the 179 outer ring brush pads can be better organized into a circular outer ring brush pad group, thereby providing more accurate 179 resistance voltage division signals and angle ranges, thereby ensuring the accuracy of the entire precision gyro sensor.

[0060] Preferably, if Figure 4 As shown, the size of the first outer ring brush pad 111 and the size of the 179th outer ring brush pad 111 are both smaller than the sizes of the remaining outer ring brush pads 111 .

[0061] When the sizes of the first outer ring brush pad and the 179th outer ring brush pad are smaller than the sizes of the other outer ring brush pads, the interval between the first outer ring brush pad and the 179th outer ring brush pad can be further made larger, which can further avoid the short circuit between the first outer ring brush pad and the 179th outer ring brush pad when the outer ring brush mechanism falls between the first outer ring brush pad and the 179th outer ring brush pad.

[0062] exist Figure 4 In the figure, the first bottom side of the outer circle brush pad 111 close to the inner circle brush pad 12 is the lower bottom of the trapezoid, and the second bottom side of the outer circle brush pad 111 close to the inner circle brush pad 12 is the upper bottom of the trapezoid, and the length of the lower bottom is less than the length of the upper bottom.

[0063] Specifically, in Figure 4 , the distance between the first outer ring brush pad and the 179th outer ring brush pad (specifically the center distance) is 0.84mm. Except for the distance between the first outer ring brush pad and the 179th outer ring brush pad, the distance between each adjacent two outer ring brush pads 111 (specifically the center distance) is 0.2mm; the lower bottom length of the first outer ring brush pad and the 179th outer ring brush pad is 0.11mm, and the upper bottom length is 0.15mm (the lower bottom length and upper bottom length of the first outer ring brush pad and the 179th outer ring brush pad are Figure 4 (not shown in the figure); the lower bottom length of each of the remaining outer ring brush pads 111 is 0.22mm, and the upper bottom length is 0.29mm; the lower bottoms of the 179 outer ring brush pads 111 form the inner ring of the entire outer ring brush pad group, and the inner ring radius is 12.1mm; the upper bottoms of the 179 outer ring brush pads 111 form the outer ring of the entire outer ring brush pad group, and the outer ring radius is 14.1mm.

[0064] Preferably, if Figure 5 , Fig. 6A , Figure 6B and Figure 6C As shown, the number of the first resistors is 180;

[0065] 180 of the first resistors are sequentially connected in series, and a first end of the circuit structure formed in series is electrically connected to a circuit power supply end, and a second end of the circuit structure formed in series is grounded;

[0066] like Figure 6A to Figure 6C As shown, in the outer ring brush pad group, the first outer ring brush pad is connected to the common connection end between the first first resistor and the second first resistor; the second outer ring brush pad is connected to the common connection end between the second first resistor and the third first resistor; the third outer ring brush pad is connected to the common connection end between the third first resistor and the fourth first resistor; and so on, for the i-th outer ring brush pad in the outer ring brush pad group, i satisfies 1≤i≤179, and the i-th outer ring brush pad is connected to the common connection end between the i-th first resistor and the i+1-th first resistor.

[0067] exist Figure 5 , Fig. 6A , Figure 6B and Figure 6C In the figure, the first resistor includes resistor R1 to resistor R180, the outer ring brush pad includes pad TP1 to pad TP179, the circuit power supply end is VCC power supply, and the resistor R1 to resistor R180 are used to divide the VCC power supply. The outer ring brush mechanism contacts 179 outer ring brush pads. By utilizing the principle of resistance voltage division, when the aircraft is in different positions, the outer ring brush mechanism contacts different outer ring brush pads (similar to a sliding rheostat), and 179 resistance voltage division signals can be obtained. The outer ring brush pad sends the obtained resistance voltage division signal to the inner ring brush pad, and then sends it to the signal acquisition circuit after the operational amplifier follower circuit enhances the driving capability, thereby realizing angle acquisition in 179 angle intervals.

[0068] Specifically, in Figure 6A to Figure 6C In the figure, VCC=5V, R1=R180=620Ω, and the other first resistors are all 27Ω (i.e., R2=R3...=R179=27Ω). By using the voltage division principle, it can be calculated that the voltage range of the input terminal of the operational amplifier follower circuit (i.e., the range of the resistor voltage division signal obtained by the outer ring brush mechanism) is 0.5V~4.5V, which can avoid the offset voltage of the operational amplifier follower circuit (for example, when the operational amplifier chip in the operational amplifier follower circuit uses AD8552ARZ, its maximum offset voltage is 30mV), and achieve rail-to-rail output of 179 resistor voltage division signals.

[0069] It should be understood that based on the above voltage and resistance settings, if the interval between the 1st outer ring brush pad and the 179th outer ring brush pad is small, when the outer ring brush mechanism falls between the 1st outer ring brush pad and the 179th outer ring brush pad, the 1st outer ring brush pad and the 179th outer ring brush pad will be short-circuited, resulting in the resistance voltage divider value obtained at this time being 2.5V, which is the same as the resistance voltage divider value obtained when the outer ring brush mechanism contacts the 90th outer ring brush pad (ie TP90), which in turn results in the same resistance voltage divider value having two azimuths, causing a conflict and making it impossible to achieve resistance voltage divider mapping.

[0070] Preferably, if Figure 7 As shown, the operational amplifier follower circuit includes an operational amplifier U1A, a second resistor R181, a first capacitor C1 and a second capacitor C2;

[0071] The positive power pin of the operational amplifier U1A is electrically connected to the circuit power supply end, the first end of the first capacitor C1 and the first end of the second capacitor C2 are both connected to the common connection end between the positive power pin of the operational amplifier U1A and the circuit power supply end, and the second end of the first capacitor C1 and the second end of the second capacitor C2 are both grounded; the negative power pin of the operational amplifier U1A is grounded; the positive phase input pin of the operational amplifier U1A is electrically connected to the inner circle brush pad, the first end of the second resistor R181 is connected to the common connection end between the positive phase input pin of the operational amplifier U1A and the inner circle brush pad, and the second end of the second resistor R181 is electrically connected to the output pin of the operational amplifier U1A; the inverting input pin of the operational amplifier U1A is electrically connected to the output pin of the operational amplifier U1A, and the output pin of the operational amplifier U1A is electrically connected to the input end of the signal acquisition circuit.

[0072] Through the operational amplifier follower circuit of the above structure, functions such as signal amplification and signal conditioning can be realized, the driving capability can be improved, and the acquisition of the resistor voltage division signal in each interval can be facilitated.

[0073] Furthermore, if Figure 7 As shown, the operational amplifier follower circuit further includes a third resistor R182;

[0074] The first end of the third resistor R182 is connected to the common connection end between the non-inverting input pin of the operational amplifier U1A and the inner circle brush pad, and the second end of the third resistor R182 is grounded.

[0075] Specifically, in this embodiment, the resistance of the third resistor R182 is 1 MΩ.

[0076] The third resistor R182 of the above design is equivalent to a resistor connected in parallel between the inner ring brush pad and the operational amplifier follower circuit, which can obtain a voltage signal of zero when the outer ring brush mechanism just falls between the outer ring brush pad TP1 and the outer ring brush pad TP179. Furthermore, when the outer ring brush mechanism just falls between the outer ring brush pad TP1 and the outer ring brush pad TP179, it avoids the input of the operational amplifier follower circuit from being suspended. It can be regarded as the zero point of the input voltage signal of the entire operational amplifier follower circuit, further increasing the angle range of the entire gyro sensor and improving the accuracy of the gyro sensor.

[0077] The remaining electronic components in the operational amplifier follower circuit of this embodiment can select appropriate specifications or product models according to actual conditions. Figure 7 As shown, no more listing is given here.

[0078] Preferably, the outer ring brush mechanism comprises an outer ring brush and a first drive assembly, and the inner ring brush mechanism comprises an inner ring brush and a second drive assembly;

[0079] The first drive assembly is electrically connected to the outer ring brush, the second drive assembly is electrically connected to the inner ring brush, and the outer ring brush is electrically connected to the inner ring brush.

[0080] The outer ring brush mechanism and the inner ring brush mechanism of the above structure can ensure the normal operation of the outer ring brush mechanism and the inner ring brush mechanism, and realize signal output and collection based on multi-resistance voltage division mapping, thereby achieving a more precise angle range.

[0081] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A precision gyro sensor based on multi-resistance voltage division mapping, characterized in that: It includes a PCB circuit board and an outer ring brush mechanism and an inner ring brush mechanism electrically connected to each other; The PCB circuit board is provided with an outer circle brush pad group, an inner circle brush pad, a multi-resistance circuit, an operational amplifier follower circuit and a signal acquisition circuit; Wherein, the outer circle brush pad group is composed of a plurality of outer circle brush pads, and the multi-resistance circuit is composed of a plurality of first resistors; the number of the outer circle brush pads and the number of the first resistors are both greater than 5; The outer ring brush mechanism is used to contact each outer ring brush pad of the outer ring brush pad group during its own operation, and is electrically connected to the multi-resistance circuit through each outer ring brush pad to obtain the resistance voltage division signal between each outer ring brush pad and the multi-resistance circuit; The inner circle brush mechanism is used to obtain the resistance voltage division signal through the outer circle brush mechanism during its own operation; and is in contact with the inner circle brush pad to transmit the resistance voltage division signal to the operational amplifier follower circuit through the inner circle brush pad; The input end of the operational amplifier follower circuit is electrically connected to the inner circle brush pad, and is used to perform signal processing on the resistance voltage division signal transmitted by the inner circle brush pad; The input end of the signal acquisition circuit is electrically connected to the output end of the operational amplifier follower circuit, and is used to acquire the resistor voltage division signal after signal processing.

2. The precision gyro sensor based on multi-resistance voltage division mapping according to claim 1, characterized in that: The outer circle brush pad group and the inner circle brush pad are both arranged on the first surface of the PCB circuit board, and the outer circle brush pad group is located outside the inner circle brush pad; the multi-resistance circuit, the operational amplifier follower circuit and the signal acquisition circuit are all arranged on the second surface of the PCB circuit board.

3. The precision gyro sensor based on multi-resistance voltage division mapping according to claim 2, characterized in that: The inner circle brush welding disc is in a circular ring shape; The number of the outer ring brush pads is 179, and the 179 outer ring brush pads are uniformly arranged on the outer periphery of the inner ring brush pads in sequence to form an outer ring brush pad group in a circular shape; Among them, the distance between the first outer ring brush pad and the 179th outer ring brush pad is greater than the distance between each other adjacent two outer ring brush pads.

4. The precision gyro sensor based on multi-resistance voltage division mapping according to claim 3, characterized in that: Each of the outer circle brush pads is trapezoidal in shape, and a first bottom edge of each of the outer circle brush pads close to the inner circle brush pads is parallel to a second bottom edge away from the inner circle brush pads, and in each of the outer circle brush pads, a length of the first bottom edge is smaller than a length of the second bottom edge.

5. The precision gyro sensor based on multi-resistance voltage division mapping according to claim 4, characterized in that: The size of the first outer ring brush pad and the size of the 179th outer ring brush pad are both smaller than the sizes of the remaining outer ring brush pads.

6. The precision gyro sensor based on multi-resistance voltage division mapping according to claim 3, characterized in that: The number of the first resistors is 180; 180 of the first resistors are sequentially connected in series, and a first end of the circuit structure formed in series is electrically connected to a circuit power supply end, and a second end of the circuit structure formed in series is grounded; In the outer ring brush pad group, the first outer ring brush pad is connected to the common connection end between the first first resistor and the second first resistor; the second outer ring brush pad is connected to the common connection end between the second first resistor and the third first resistor; the third outer ring brush pad is connected to the common connection end between the third first resistor and the fourth first resistor; and so on, for the i-th outer ring brush pad in the outer ring brush pad group, i satisfies 1≤i≤179, and the i-th outer ring brush pad is connected to the common connection end between the i-th first resistor and the i+1-th first resistor.

7. The precision gyro sensor based on multi-resistance voltage division mapping according to claim 6, characterized in that: The operational amplifier follower circuit includes an operational amplifier U1A, a second resistor R181, a first capacitor C1 and a second capacitor C2; The positive power pin of the operational amplifier U1A is electrically connected to the circuit power supply end, the first end of the first capacitor C1 and the first end of the second capacitor C2 are both connected to the common connection end between the positive power pin of the operational amplifier U1A and the circuit power supply end, and the second end of the first capacitor C1 and the second end of the second capacitor C2 are both grounded; the negative power pin of the operational amplifier U1A is grounded; the positive phase input pin of the operational amplifier U1A is electrically connected to the inner circle brush pad, the first end of the second resistor R181 is connected to the common connection end between the positive phase input pin of the operational amplifier U1A and the inner circle brush pad, and the second end of the second resistor R181 is electrically connected to the output pin of the operational amplifier U1A; the inverting input pin of the operational amplifier U1A is electrically connected to the output pin of the operational amplifier U1A, and the output pin of the operational amplifier U1A is electrically connected to the input end of the signal acquisition circuit.

8. The precision gyro sensor based on multi-resistance voltage division mapping according to claim 7, characterized in that: The operational amplifier follower circuit further includes a third resistor R182; The first end of the third resistor R182 is connected to the common connection end between the non-inverting input pin of the operational amplifier U1A and the inner circle brush pad, and the second end of the third resistor R182 is grounded.

9. The precision gyro sensor based on multi-resistance voltage division mapping according to any one of claims 1 to 8, characterized in that: The outer ring brush mechanism includes an outer ring brush and a first drive assembly, and the inner ring brush mechanism includes an inner ring brush and a second drive assembly; The first drive assembly is electrically connected to the outer ring brush, the second drive assembly is electrically connected to the inner ring brush, and the outer ring brush is electrically connected to the inner ring brush.

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