CN211528945U - Program-controlled capacitor device based on air-adjustable capacitor - Google Patents
Program-controlled capacitor device based on air-adjustable capacitor Download PDFInfo
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- CN211528945U CN211528945U CN201921396189.5U CN201921396189U CN211528945U CN 211528945 U CN211528945 U CN 211528945U CN 201921396189 U CN201921396189 U CN 201921396189U CN 211528945 U CN211528945 U CN 211528945U
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Abstract
The utility model provides a program-controlled capacitor device based on air adjustable capacitor, belonging to an automatic control device of adjustable capacitor, comprising an air adjustable capacitor, a motor and a control system; the air adjustable capacitor comprises a movable plate, and the rotation angle of the movable plate determines the capacitance value of the program-controlled capacitor; the motor is connected with the moving plate, the control system controls the rotation angle of the moving plate through the rotation speed of the motor, and then the capacitance value of the program-controlled capacitor is controlled, and the digital control of capacitor output is realized.
Description
Technical Field
The utility model belongs to electric capacity automatic control field relates to electric capacity automatic control device, concretely relates to programme-controlled electric capacity device based on adjustable electric capacity of air.
Background
Capacitance value adjustable capacitors are often needed in electronic circuits, most of existing adjustable capacitors are mechanical capacitors, manual driving of switches or knobs is needed, manual power is used as mechanical power to input and adjust capacitance values, repeated workload is large, remote control cannot be achieved, and using requirements of automatic equipment cannot be met.
Meanwhile, the problem of low control precision inevitably occurs in the manual mechanical control. Therefore, there is an urgent need to develop a capacitor output device which is automated, has high precision, and can meet different capacitance adjustments.
Disclosure of Invention
In order to achieve the purpose, the utility model provides a programme-controlled electric capacity device based on adjustable electric capacity of air solves the technical problem that the precision that present programme-controlled electric capacity mechanical type regulation brought is low
In order to achieve the purpose, the utility model adopts the following technical scheme:
a program-controlled capacitor device based on an air adjustable capacitor comprises the air adjustable capacitor, a motor and a control system; the air adjustable capacitor comprises a movable plate, and the rotation angle of the movable plate determines the capacitance value of the program-controlled capacitor; the motor is connected with the moving plate, and the control system controls the rotation angle of the moving plate through the rotation speed of the motor so as to control the capacitance value of the program-controlled capacitor.
Further, the rotation angle of the moving plate determines the capacitance value of the programmable capacitor, wherein the functional relation that the rotation angle degree value y of the moving plate and the capacitance value x of the programmable capacitor satisfy is as follows:
y＝(-3×10-10)x5+(3×10-7)x4-0.0001x3+0.0193x2-2.1318x+196.27
furthermore, a functional relation formula which is satisfied by the rotation angle degree value y of the moving plate and the capacitance value x of the programmable capacitor is stored in the control system, and when the control system is converted from the capacitor input into the rotation angle output of the moving plate, the interpolation is carried out according to the functional relation formula.
Furthermore, the control system comprises a control module, a motor driving module and a communication module;
the motor driving module is connected with an electric plug of the motor, and the communication module is connected with the control module;
the control module controls the motor driving module to enable the motor to rotate by a corresponding angle;
the communication module is used for acquiring the capacitance value and transmitting the capacitance value to the control module.
The air adjustable capacitor is characterized by further comprising an upper computer, wherein the upper computer inputs the capacitance value to the control module through the communication module, and then the control module controls the motor driving module to enable the motor to rotate so as to drive the air adjustable capacitor to output the corresponding capacitance value.
Furthermore, the host computer and the communication module are communicated by a CAN bus; the communication chip adopts a transceiver chip, the transceiver chip converts a sending signal of the bxCAN controller into a differential level signal on the CAN bus to be output, and simultaneously converts the differential level signal on the bus into a receiving signal to be input into a CAN receiving buffer area of the control module.
Preferably, the motor adopts a speed reduction stepping motor and comprises a stepping motor, a speed reducer and an electric plug, a spindle of the stepping motor is connected with a rotating shaft of a moving plate of the air adjustable capacitor after being reduced by the speed reducer, and the electric plug is connected with the control system.
More preferably, the connection of the electrical plug and the control system specifically comprises: the electric plug is connected with a motor driving circuit of the motor driving module, four interfaces with different colors in the electric plug are respectively connected with four driving signals in the motor driving circuit, and the control module takes four pins to output and is respectively connected with INA, INB, INC and IND in the motor driving circuit.
Compared with the prior art, the beneficial effects of the utility model are that:
because the user demand of automation equipment can't be satisfied to mechanical type adjustable capacitor, compare in mechanical type adjustable electric capacity, the utility model discloses a remote digital control can be realized to the adjustable electric capacity device of program control, and response speed is fast, satisfies the demand of the automatic modulation output of electric capacity.
And simultaneously, the utility model discloses use the controller control, step motor actuates, and speed reduction step motor drive accuracy is high, imbeds accurate functional relation formula in the MCU, can carry out accurate output control (precision 0.1pF) to the adjustable electric capacity of air, can accurately realize the required capacitance value of remote control output automation equipment.
Drawings
Fig. 1 is a schematic view of the programmable capacitor device of the present invention;
FIG. 2 is a table showing the rotation angle and capacitance value of the air adjustable capacitor;
FIG. 3 is a driving circuit diagram of a stepping motor;
fig. 4 is a communication circuit diagram.
Wherein: 1. the device comprises a moving plate, 2, a fixed plate, 3, a speed reducer, 4, a stepping motor, 5 and an electric plug.
Detailed Description
The following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so as to enable those skilled in the art to more easily understand the advantages and features of the present invention, and thereby define the scope of the invention more clearly and clearly.
Example 1:
as shown in fig. 1-4, the present embodiment provides a programmable capacitor device based on an air tunable capacitor,
a program-controlled capacitor device based on an air adjustable capacitor comprises the air adjustable capacitor, a motor and a control system; the air adjustable capacitor comprises a movable plate, and the rotation angle of the movable plate determines the capacitance value of the program-controlled capacitor; the motor is connected with the moving plate, and the control system controls the rotation angle of the moving plate through the rotation speed of the motor so as to control the capacitance value of the program-controlled capacitor.
Further, the rotation angle of the moving plate determines the capacitance value of the programmable capacitor, wherein the functional relation that the rotation angle degree value y of the moving plate and the capacitance value x of the programmable capacitor satisfy is as follows:
y＝(-3×10-10)x5+(3×10-7)x4-0.0001x3+0.0193x2-2.1318x+196.27
furthermore, a functional relation formula which is satisfied by the rotation angle degree value y of the moving plate and the capacitance value x of the programmable capacitor is stored in the control system, and when the control system is converted from the capacitor input into the rotation angle output of the moving plate, the interpolation is carried out according to the functional relation formula.
Furthermore, the control system comprises a control module, a motor driving module and a communication module;
the motor driving module is connected with an electric plug of the motor, and the communication module is connected with the control module;
the control module controls the motor driving module to enable the motor to rotate by a corresponding angle;
the communication module is used for acquiring the capacitance value and transmitting the capacitance value to the control module.
The air adjustable capacitor is characterized by further comprising an upper computer, wherein the upper computer inputs the capacitance value to the control module through the communication module, and then the control module controls the motor driving module to enable the motor to rotate so as to drive the air adjustable capacitor to output the corresponding capacitance value.
Furthermore, the host computer and the communication module are communicated by a CAN bus; the communication chip adopts a transceiver chip, the transceiver chip converts a sending signal of the bxCAN controller into a differential level signal on the CAN bus to be output, and simultaneously converts the differential level signal on the bus into a receiving signal to be input into a CAN receiving buffer area of the control module.
Preferably, the motor adopts a speed reduction stepping motor and comprises a stepping motor, a speed reducer and an electric plug, a spindle of the stepping motor is connected with a rotating shaft of a moving plate of the air adjustable capacitor after being reduced by the speed reducer, and the electric plug is connected with the control system.
More preferably, the connection of the electrical plug and the control system specifically comprises: the electric plug is connected with a motor driving circuit of the motor driving module, four interfaces with different colors in the electric plug are respectively connected with four driving signals in the motor driving circuit, and the control module takes four pins to output and is respectively connected with INA, INB, INC and IND in the motor driving circuit.
The utility model discloses an air adjustable capacitor uses the air just as the condenser of medium, but comprises the multiple-disc 180 pivoted rotor plates and the fixed stator plate of multiple-disc, and its electric capacity is adjustable in succession at certain extent. The rotating shaft of the moving plate is connected with the output shaft of the speed reducer of the speed reducing stepping motor, and the output of different capacitance values is realized through the rotating angle of the moving plate. The utility model discloses a step motor decelerates mainly includes step motor, reduction gear and electric plug, and the step motor main shaft links to each other with the movable plate pivot of the adjustable electric capacity of air after the reduction gear slows down, and the electric plug links to each other with MCU control system. The MCU control system mainly comprises an MCU module, a stepping motor driving module and a communication module. Wherein the stepping motor driving module is connected with the electric plug of the speed reducing stepping motor.
The utility model discloses an implement the principle and do: the host computer passes through communication module, inputs the capacitance value to MCU, and by MCU control step motor drive module again, make step motor rotate corresponding angle, drive the corresponding capacitance value of adjustable electric capacity output of air, figure 2 shows the adjustable electric capacity rotation angle of air and holds the value look-up table, stores MCU after discretizing this table data, MCU when turning into angle output by electric capacity input, this table of interpolation inquiry.
Fig. 1-4 show a structure and a circuit diagram of a preferred embodiment of a programmable capacitor device based on an air tunable capacitor. The method comprises the following steps: the speed reducing stepping motor and the air adjustable capacitor mechanism are sequentially provided with a movable plate 1, a fixed plate 2, a speed reducer 3, a stepping motor 4 and an electric plug 5. The MCU control system comprises an MCU, an L289N stepping motor driving chip, a TJA1050 communication chip and peripheral electronic elements. A main shaft of a stepping motor 4 is connected with a rotor plate rotating shaft of the air adjustable capacitor 1 after being decelerated by a speed reducer 3, and output of different capacitance values is realized through different rotating angles of the rotor plate 1 relative to the stator plate 2.
In fig. 1-2, the electrical plug 5 of the stepping motor 4 is connected to the driving circuit of the stepping motor controlled by the MCU, Brown, Black, White, Red are respectively connected to OUTC, OUTD, OUTA, OUTB in the driving circuit, the MCU has four pins to output, which are respectively connected to INA, INB, INC, IND in the driving circuit, since L298N is an H-bridge driver, the four output terminals are the output terminals of 2H-bridges, which are connected to the windings of the motor, and the output state depends on the state of the input signal. The four input terminals are switches of the H-bridge to control the rotational output of the stepper motor.
In fig. 3, L298N is an H-bridge driver, four output terminals are output terminals of 2H-bridges connected to the windings of the motor, and the state of the output depends on the state of the input signal. The four input terminals are the switches of the H-bridge. Eight diodes act as free-wheeling, which is the most common protection when an inductive load is connected.
In fig. 4, the CAN bus is connected to the physical bus through two output terminals CANH and CANL of the CAN transceiver interface chip 82C250, RXD is a pin for receiving data, and TXD is a pin for transmitting data. The upper computer and the MCU communicate through CAN bus, and the MCU may be STM series of semiconductor. The STM32 integrates a CAN protocol controller inside, but still needs an external CAN bus transceiver to communicate with other nodes on the bus; the communication chip adopts a TJA1050 transceiver chip; the TJA1050 transceiver chip converts a TX signal of the bxCAN controller into a differential level on a CAN bus to be output, converts a differential signal on the bus into an RX signal at the same time, and inputs the RX signal into a CAN receiving buffer of the STM 32.
The host computer passes through communication module, inputs the capacitance value to MCU, and figure 2 has given air adjustable capacitance rotation angle and appearance value look-up table, stores this table data discretization back in MCU, and MCU is when changeing into angle output by the electric capacity input, and this table of interpolation inquiry, output corresponding angle makes step motor rotate, drives air adjustable capacitance value corresponding of output. The upper computer is connected with a COMP port of the communication circuit, the MCU is internally integrated with the CAN protocol controller, but the upper computer still needs to be externally connected with a CAN bus transceiver to communicate with other nodes on the bus, the TJA1050 transceiver chip converts a TX signal of the bxCAN controller into a differential level on the CAN bus to be output, and simultaneously converts a differential signal on the bus into an RX signal to be input into a CAN receiving buffer area of the MCU to realize remote control.
The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.
Claims (6)
1. A program-controlled capacitor device based on an air adjustable capacitor is characterized by comprising the air adjustable capacitor, a motor and a control system; the air adjustable capacitor comprises a movable plate, and the rotation angle of the movable plate determines the capacitance value of the program-controlled capacitor; the motor is connected with the moving plate, and the control system controls the rotation angle of the moving plate through the rotation speed of the motor so as to control the capacitance value of the program-controlled capacitor.
2. The programmable capacitor-based device of claim 1 wherein the control system comprises a control module, a motor drive module and a communication module;
the motor driving module is connected with an electric plug of the motor, and the communication module is connected with the control module;
the control module controls the motor driving module to enable the motor to rotate by a corresponding angle;
the communication module is used for acquiring the capacitance value and transmitting the capacitance value to the control module.
3. The program-controlled capacitor device based on the air-adjustable capacitor as claimed in claim 2, further comprising an upper computer, wherein the upper computer inputs the capacitance value to the control module through the communication module, and the control module controls the motor driving module to rotate the motor to drive the air-adjustable capacitor to output the corresponding capacitance value.
4. The programmable capacitance device based on air adjustable capacitance of claim 3, wherein the upper computer and the communication module communicate using a CAN bus; the communication chip adopts a transceiver chip, the transceiver chip converts a sending signal of the bxCAN controller into a differential level signal on the CAN bus to be output, and simultaneously converts the differential level signal on the bus into a receiving signal to be input into a CAN receiving buffer area of the control module.
5. The programmable capacitor device based on the air-adjustable capacitor as claimed in claim 2, wherein the motor is a step-down motor, which comprises a step motor, a reducer and an electrical plug, the spindle of the step motor is connected to the rotor shaft of the air-adjustable capacitor after being reduced by the reducer, and the electrical plug is connected to the control system.
6. The programmable capacitor-based air tunable capacitor of claim 5 wherein the connection of the electrical plug to the control system specifically comprises: the electric plug is connected with a motor driving circuit of the motor driving module, four interfaces with different colors in the electric plug are respectively connected with four driving signals in the motor driving circuit, and the control module takes four pins to output and is respectively connected with four terminals in the motor driving circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921396189.5U CN211528945U (en) | 2019-08-26 | 2019-08-26 | Program-controlled capacitor device based on air-adjustable capacitor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921396189.5U CN211528945U (en) | 2019-08-26 | 2019-08-26 | Program-controlled capacitor device based on air-adjustable capacitor |
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| CN211528945U true CN211528945U (en) | 2020-09-18 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112985539A (en) * | 2021-02-25 | 2021-06-18 | 南京航空航天大学 | Capacitive liquid level sensor simulation system and method |
| CN113992000A (en) * | 2021-10-21 | 2022-01-28 | 江苏神州半导体科技有限公司 | Vacuum ceramic adjustable capacitance closed-loop control system |
-
2019
- 2019-08-26 CN CN201921396189.5U patent/CN211528945U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112985539A (en) * | 2021-02-25 | 2021-06-18 | 南京航空航天大学 | Capacitive liquid level sensor simulation system and method |
| CN113992000A (en) * | 2021-10-21 | 2022-01-28 | 江苏神州半导体科技有限公司 | Vacuum ceramic adjustable capacitance closed-loop control system |
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