KR100828127B1 - Gyro initial driving circuit using hole sensor - Google Patents

Abstract

The present invention relates to a gyro initial driving circuit using a Hall sensor, and more particularly, a drive coil block consisting of a gyro composed of a rotating two-pole magnet, a rapid starting coil and a rotating coil, a two-axis gimbal, and a rotating bearing. And a gyro assembly comprising an optical system, an infrared detector, and a mechanism, wherein the hall sensor unit is attached to a predetermined position of the drive coil block and outputs a signal according to the rotational position of the rotatable two-pole magnet; A power supply coil energizing unit for energizing the power supply coil using signals output from hall sensors installed at corresponding positions, and the rotary coil using signals output from the other hall sensors except for the Hall sensors; It characterized in that it comprises a rotary coil energizing portion for energizing the.

Therefore, according to the present invention configured as described above to detect the magnetic pole of the gyro consisting of a rotating two-pole magnet using four Hall sensors, by placing the Hall sensor to rotate the gyro through the output of the Hall sensor to the initial stage of the gyro The starting point can be eliminated during operation.

Gyro Assembly, Rotating 2-pole Magnet, Initial Drive Circuit, Hall Sensor, Drive Coil Block

Description

GYRO INITIAL DRIVING CIRCUIT USING HOLE SENSOR}

Figure 1 is a side cross-sectional view showing the arrangement of the Hall sensor in the gyro initial drive circuit using the Hall sensor according to the present invention

2 is a cross-sectional view taken along the line A-A of FIG.

Figure 3 is a block circuit diagram showing the configuration of the gyro initial drive circuit using a Hall sensor according to the present invention

4 is a connection diagram of the Hall sensor of FIG.

Figure 5 is a waveform diagram showing the output waveform of each Hall sensor of the gyro initial drive circuit using the Hall sensor according to the present invention when the gyro assembly rotates counterclockwise

<Description of the symbols for the main parts of the drawings>

10: Gyro Assembly 11: Gyro

12: drive coil block 13: power supply coil

14: rotation coil 100: gyro initial drive circuit

110: Hall sensor 111-114: First to fourth Hall sensor

120: power supply coil energization unit 121: first differential amplifier                 

122: inverted power amplifier 123: relay

124: comparator 125: transistor

130: rotating coil energizing unit 131: second differential amplifier

132, 133: first and second analog switches 134: adder

135: dual power amplifier

The present invention relates to a gyro initial driving circuit, and more particularly, to detect the magnetic pole of the gyro composed of a rotary two-pole magnet using four Hall sensors, the Hall sensor so that the gyro can rotate through the output of the Hall sensor The present invention relates to a gyro initial driving circuit using a Hall sensor to remove the starting point during the initial driving of the gyro.

In general, a gyro assembly refers to a device that follows a target while rotating an infrared detector.

The gyro assembly is composed of a rotating two-pole magnet, a drive coil block consisting of a quick start coil and a rotating coil, a biaxial gimbal, a rotating bearing, an optical system, an infrared detector, and an instrument.

On the other hand, the gyro motor driving method is designed with two-phase propagation, and two Hall sensors in a 90-degree phase relationship (an attachment position differs 90 degrees from each other) are attached to the two-phase propagation drive.

However, the gyro applied to such an infrared searcher is inclined at an angle of up to ± 40 degrees, and the position of the gyro in the initial stop state is not fixed at a specific position and uses the two Hall sensors mentioned above, and the position of the initial gyro is If the angle of 40 degrees inclined to the intermediate point between the third Hall sensor and the fourth Hall sensor in FIG. 2, the two Hall sensors have a problem that a starting point that does not detect the magnetic pole of the gyro is generated.

Therefore, an object of the present invention is to solve the above problems, the magnetic pole of the gyro consisting of a rotating two-pole magnet is detected using four Hall sensors, the hall so that the gyro can rotate through the output of the Hall sensor The sensor is arranged to eliminate the no starting point.

Features of the present invention for achieving the above object,

In the gyro assembly consisting of a gyro consisting of a rotating two-pole magnet, a drive coil block consisting of a rapid starting coil and a rotating coil, a two-axis gimbal, a rotating bearing, an optical system, an infrared detector, and a mechanism,

A hall sensor unit attached to a predetermined position of the driving coil block and outputting a signal according to a rotation position of the gyro;

An electric power supply coil energizing unit for energizing the electric power supply coil using signals output from the Hall sensors provided at corresponding positions among the Hall sensor units;                     

It characterized in that it comprises a rotary coil energizing unit for energizing the rotary coil by using a signal output from each of the other Hall sensors except the Hall sensors.

Here, the Hall sensor unit,

A first hall sensor attached to the driving coil block at a position of 0 degrees;

A second hall sensor attached at an interval of 90 degrees in a counterclockwise direction with the first hall sensor;

A third hall sensor attached to the second hall sensor at an interval of 90 degrees in a counterclockwise direction;

And a fourth hall sensor attached to the third hall sensor at an interval of 90 degrees in a counterclockwise direction.

Here also the rotary coil,

Attached to positions of the first hall sensor and the third hall sensor, respectively;

The quick start coil,

The second hall sensor and the fourth hall sensor are respectively attached to the positions and connected to each other.

Here, the rapid-start coil energizing unit,

A first differential amplifier for differentially amplifying the output signals of the first and third hall sensors and outputting a first initial driving signal;

An inverted power amplifier for inverting and amplifying the first initial drive signal output from the first differential amplifier and outputting a drive signal;                     

The driving signal output from the inverting power amplifier is composed of a relay which is switched according to the magnitude of the FRVG output by changing the rotational frequency of the gyro to the DC voltage value and outputs to the rapid start coil.

Here, the rotary coil energizing unit,

A second differential amplifier for differentially amplifying the output signals of the second and fourth hall sensors and outputting a second initial driving signal;

A first analog switch configured to switch the second initial driving signal output from the second differential amplifier according to the magnitude of the VCONT which is varied according to the magnitude of the rotation frequency of the gyro and output;

A second analog switch for switching and outputting an RRSSPA, which is a triangular wave-shaped control signal for maintaining a constant rotation frequency of the gyro, according to the size of the VCONT;

An adder for converting a signal output from the first analog switch and the second analog switch into a square wave signal after amplification;

A square wave signal output from the adder is amplified by an internal non-inverting power amplifier and an inverting power amplifier, respectively, and configured as a dual power amplifier for energizing the respective rotating coils.

Here again in the front of the relay,

A comparator for comparing the FRVG and a reference signal and outputting a negative saturation voltage when the magnitude of the input FRVG is less than or equal to a predetermined level;                     

And a transistor turned on by a negative saturation voltage output from the comparator to turn on the relay.

Hereinafter, the configuration of the gyro initial driving circuit using the Hall sensor according to the present invention will be described in detail with reference to FIGS. 1 to 5.

1 is a side cross-sectional view illustrating an arrangement of a Hall sensor in an initial gyro driving circuit using a Hall sensor according to the present invention, FIG. 2 is a cross-sectional view taken along line AA of FIG. 1, and FIG. Figure 4 is a block circuit diagram showing the configuration of the furnace, Figure 4 is a connection diagram of the Hall sensor in Figure 3, Figure 5 is a Hall sensor of the gyro initial drive circuit using the Hall sensor according to the present invention when the gyro assembly rotates counterclockwise Is a waveform diagram showing an output waveform of?

First, the gyro assembly 10 to which the present invention is applied includes a gyro 11, a driving coil block 12, a rotary coil 14, and a biaxial gimbal, as shown in FIG. 1. (15) and a nut (16) for assembling an optical system, an infrared detector, a rotating bearing for rotating the optical system, and a gyro composed of the optical system and biaxial gimbal with the mechanism (17).

1 to 5, the gyro initial driving circuit 100 using the hall sensor according to the present invention includes a hall sensor unit 110, a rapid start coil energizing unit 120, and a rotating coil energizing unit 130. It is composed of

The hall sensor unit 110 is attached to a predetermined position outside the driving coil block 12 to output a signal according to the rotational position of the gyro 11, and the second hall sensor 112. And a third hall sensor 113 and a fourth hall sensor 114.

The first hall sensor 111 is attached to a position of 0 degrees (left side in FIG. 2) outside the driving coil block 12, and the second hall sensor 112 is counterclockwise with the first hall sensor 111. It is attached at intervals of 90 degrees, the third Hall sensor 113 is attached to the second Hall sensor 112 at 90 degrees in a counterclockwise direction, and the fourth Hall sensor 114 is connected to the third Hall sensor 113. It is attached at intervals of 90 degrees counterclockwise. Meanwhile, the wiring of each hall sensor is made as shown in FIG. 4.

Here, the rotary coil 14 of the gyro assembly 10 is attached to the positions of the second hall sensor 112 and the fourth hall sensor 114, respectively, and is independently connected, and the quick start coil 13 is the first hole. Attached to the position of the sensor 111 and the third hall sensor 113, respectively, are connected in series.

Here, when the N pole of the magnet is located in each Hall sensor, the Hall sensor shows a positive output. When the S pole of the magnet is located, the Hall sensor shows a negative output. In addition, since the third hall sensor 113 is attached to the opposite side (180 degrees) with respect to the position of the first hall sensor 111, the inversion output (HS180N) with respect to the output (HS0P / HS0N) of the first hall sensor 111. / HS180P), and the fourth hall sensor 114 also shows an inverted output (HS270N / HS270P) with respect to the output (HS90P / HS90N) of the second hall sensor 112 as described above.

On the other hand, the motor driving method according to the present invention is designed as two-phase propagation. Generally, the number of Hall sensors required for two-phase propagation is sufficient as two in a 90 degree phase relationship (an attachment position differs from each other by 90 degrees). The gyro applied to the infrared searcher is inclined at an angle of up to ± 40 degrees, and the position of the gyro in the initial stop state is not fixed at a specific position and the two Hall sensors (first hall sensor and second hall sensor) mentioned above are not fixed. If the position of the initial gyro is inclined 40 degrees to the intermediate point between the third hall sensor 113 and the fourth hall sensor 114 in FIG. 2, the two hall sensors do not detect the stimulus of the gyro. Since no starting point occurs, the present invention eliminates the starting point using four Hall sensors.

The emergency starting coil energizing unit 120 uses the signals output from the first hall sensor 111 and the third hall sensor 113 provided at corresponding positions among the hall sensor units 110, respectively. And a first differential amplifier 121, an inverted power amplifier 122, a relay 123, a comparator 124 and a transistor 125 so as to energize.

The first differential amplifier 121 differentially amplifies the output signals of the first hall sensor 111 and the third hall sensor 113 and outputs a first initial driving signal 'HALL0'.

The inverting power amplifier 122 inverts and amplifies the 'HALL0' which is the first initial driving signal output from the first differential amplifier 121 and outputs a driving signal.

The relay 123 switches the driving signal output from the inverted power amplifier 122 to the rapid start coil 13 by switching the rotation frequency of the gyro 11 according to the magnitude of the FRVG outputted by changing the DC voltage value.

The comparator 124 compares the FRVG and the reference signal and outputs a negative saturation voltage when the magnitude of the input FRVG is equal to or less than a predetermined level.

Transistor 125 is turned on by the negative saturation voltage output from comparator 124 to turn on relay 123.

The rotary coil energizer 130 may include a second differential amplifier 131 and a second differential amplifier 131 to energize the rotary coil 14 using signals output from the second and fourth hall sensors 112 and 114, respectively. A first analog switch 132, a second analog switch 133, an adder 134, and a dual power amplifier 135 are included.

The second differential amplifier 131 differentially amplifies the output signals of the second hall sensor 112 and the fourth hall sensor 114 and outputs a second initial driving signal 'HALL90'.

The first analog switch 132 is switched according to the magnitude of the VCONT output by varying the second initial drive signal 'HALL90' output from the second differential amplifier 131 according to the size of the rotation frequency of the gyro 11. Output

The second analog switch 133 switches and outputs RRSSPA, which is a triangular wave form control signal for maintaining a constant rotation frequency of the gyro 11, according to the size of VCONT.

The adder 134 converts the signal output from the first analog switch 132 and the second analog switch 133 into a square wave signal after amplification and outputs the square wave signal.

The dual power amplifier 135 amplifies the square wave signal output from the adder 134 in each of the internal non-inverting power amplifier 136 and the inverting power amplifier 137 to energize each rotary coil 14.

Hereinafter, the operation of the gyro initial driving circuit using the Hall sensor according to the present invention will be described in detail with reference to FIGS. 1 to 5.

First, when the gyro 11 rotates in the counterclockwise direction, the first hall sensor 111 to the fourth hall sensor 114 generate differential output signals, respectively, according to the position (stimulus) of the rotatable two-pole magnet. The first differential amplifier 121 and the second differential amplifier 131 are amplified to generate initial driving signals 'HALL0' and 'HALL90'.

'HALL0' is input to the inverting power amplifier 122, and the inverting power amplifier 122 operates as an inverting comparator with respect to the input of 'HALL0' and is attached 90 degrees ahead of the position of the first hall sensor 111. The starting coil 13 is energized. In this case, the relay 123 is controlled by the transistor 125. The signal for determining whether the transistor 125 is operated is FRVG, and the FRVG is a signal in which the rotation frequency of the gyro 11 is output as a DC voltage value. If it is less than the reference voltage of 124 (rotation frequency is 95 Hz or less), the comparator 124 outputs a negative saturation voltage to operate the transistor 125. When the transistor 125 is turned on, the relay 123 is turned on to connect the inverted power amplifier 122 and the rapid start coil 13.

In addition, the 'HALL90' is inputted to the adder 134 via the first analog switch 132, and then converted into a square wave signal by the high amplification degree of the adder 134, and the second power amplifier 135 composed of a current feedback circuit is formed. The attachment end rotary coils 14 are energized before the position of the two-hole sensor 112, respectively.

When energization is started between the rapid starting coil 13 and the rotating coil 14, the gyro 11 starts to rotate out of the stopped state by the magnetic flux generated in each coil. The reason for operating the inverted power amplifier 122 and the dual power amplifier 135 as a square wave is to increase the initial rotational acceleration to reach the set rotational frequency (95 Hz) for a short time (3 to 4 seconds). To do so.                     

On the other hand, the first analog switch 132 and the second analog switch 133 are controlled by VCONT. The VCONT becomes a positive saturation voltage (+ 12V) when the gyro 11 has a rotational frequency of 95 Hz or less. 132 is turned on, the second analog switch 133 is turned off, on the contrary, when the rotation frequency of the gyro 11 is greater than or equal to 95 Hz, the first analog switch 132 is turned off. The second analog switch 133 is turned on.

When the rotational frequency of the gyro 11 becomes 95 Hz or more, the FRVG becomes larger than the reference voltage of the comparator 124 so that the comparator 124 outputs a positive saturation voltage. As a result, the transistor 125 is turned off and the relay 123 is turned off in conjunction with it. Then, the output of 'HALL0' output from the inverting power amplifier 122 is cut off to stop the magnetic flux generation in the starting coil (13).

At the time when the rotation frequency of the gyro 11 becomes 95 Hz or more, since the VCONT becomes 0 V, the first analog switch 132 is turned off, and the second analog switch 133 is turned on so that the RRSSPA is added to the adder ( 134) and amplified. The signal amplified by the adder 134 is input to the dual power amplifier 135 to energize the rotary coil 14, respectively.

RRSSPA is a triangular wave-shaped control signal for keeping the rotation frequency of the gyro 11 constant (100 Hz). When the rotation frequency of the gyro becomes higher than the holding frequency (100 Hz), the RRSSPA is out of phase with the acceleration signal supplied when the rotation frequency is lower than the holding frequency. Inverted, driving the rotary coil 14 to reduce the rotation frequency.

Since the power for keeping the rotation frequency constant (100 Hz) of the gyro 11 is smaller than the initial driving (95 Hz) power, the rotation coil (not driven) is not driven when the rotation frequency is 95 Hz or more. 14) Keep the rotation frequency constant.

Therefore, two additional Hall sensors can be attached to eliminate the starting point of the gyro assembly.

As described above, according to the gyro initial driving circuit using the Hall sensor according to the present invention, the magnetic pole of the gyro composed of a rotating two-pole magnet is detected using four Hall sensors, and the gyro rotates through the output of the Hall sensor. The Hall sensor can be arranged to eliminate the starting point during the initial operation of the gyro.

Claims (6)

delete delete In the gyro assembly consisting of a gyro consisting of a rotating two-pole magnet, a drive coil block consisting of a rapid starting coil and a rotating coil, a two-axis gimbal, a rotating bearing, an optical system, an infrared detector, and a mechanism, A hall sensor unit attached to a predetermined position of the driving coil block and outputting a signal according to a rotation position of the gyro; An electric power supply coil energizing unit for energizing the electric power supply coil using signals output from the Hall sensors provided at corresponding positions among the Hall sensor units; And a rotary coil energizer configured to energize the rotary coil by using signals output from the other hall sensors except for the hall sensors. The Hall sensor unit may include a first Hall sensor attached to the driving coil block at a position of 0 degrees, a second Hall sensor attached at intervals of 90 degrees in a counterclockwise direction with the first Hall sensor, and the second Hall sensor; And a third hall sensor attached at intervals of 90 degrees in a counterclockwise direction, and a fourth hall sensor attached at intervals of 90 degrees in a counterclockwise direction with the third hall sensor. The rotary coils are attached to the positions of the first hall sensor and the third hall sensor, respectively, and are independently connected, and the emergency starting coils are attached to the positions of the second and fourth hall sensors, respectively. Gyro initial drive circuit using a hall sensor, characterized in that. The method of claim 3, wherein The quick start coil energizing unit, A first differential amplifier for differentially amplifying the output signals of the first and third hall sensors and outputting a first initial driving signal; An inverted power amplifier for inverting and amplifying the first initial drive signal output from the first differential amplifier and outputting a drive signal; Using a Hall sensor characterized in that the drive signal output from the inverted power amplifier is switched according to the magnitude of the FRVG to be output by changing the rotational frequency of the gyro output to the rapid start coil Gyro initial drive circuit. The method of claim 3, wherein The rotary coil energizing unit, A second differential amplifier for differentially amplifying the output signals of the second and fourth hall sensors and outputting a second initial driving signal; A first analog switch configured to switch the second initial driving signal output from the second differential amplifier according to the magnitude of the VCONT which is varied according to the magnitude of the rotation frequency of the gyro and output; A second analog switch for switching and outputting an RRSSPA, which is a triangular wave-shaped control signal for maintaining a constant rotation frequency of the gyro, according to the size of the VCONT; An adder for converting a signal output from the first analog switch and the second analog switch into a square wave signal after amplification; And a dual power amplifier configured to amplify a square wave signal output from the adder in an internal non-inverting power amplifier and an inverting power amplifier, respectively, and to energize each of the rotary coils. The method of claim 4, wherein In front of the relay, A comparator for comparing the FRVG and a reference signal and outputting a negative saturation voltage when the magnitude of the input FRVG is less than or equal to a predetermined level; And a transistor which is turned on by a negative saturation voltage output from the comparator and turns on the relay.

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