Pulse counting system for measuring rotating speed of output shaft of ram air actuator cylinder motor

Abstract

The utility model discloses a pulse counting system for measuring the rotating speed of the output shaft of a ram air actuator cylinder motor, the power supply end of a counter is connected with a low-voltage power supply, the first signal input end of the counter is connected with the emitter of a triode, and the emitter of the triode is connected with a high-voltage power supply through a first resistor; the second signal input end of the counter is connected with the collector of the triode, and the reset end of the counter is connected with the second signal input end of the triode through a switch S; the high-voltage power supply is connected with the plug pin U through the third resistor. The base electrode of the triode is sequentially connected in series with the second resistor and the AND gate and then connected between the third resistor and the plug pin. And the AND gate is connected with a low-voltage power supply, and the plug pin is connected with a Hall sensor arranged at the output end of the actuator cylinder motor. The device has the advantages that the rotation speed of the motor output shaft can be measured when the actuator cylinder operates at high and low speeds, the test requirements of parts in a manual are met, the problem that the rotation speed of the output shaft is difficult to calculate is solved, and the reliability of part maintenance is improved.

Description

Technical Field

[0001] The invention relates to the technical field of output shaft speed measurement, and in particular to a pulse counting system for measuring the output shaft speed of a ram air actuator motor. Background Art

[0002] At present, major airlines and component maintenance manufacturers (MROs) in the civil aviation field use test equipment and instruments to make and purchase various types of equipment provided by OEM manufacturers when performing functional tests on actuator components. However, the tooling equipment made by relevant OEM manufacturers is expensive and difficult or impossible to purchase. They only need to consult relevant technical information to understand the functional principles of components and the maintenance conditions in the component maintenance manual, and design and manufacture equipment and devices that can be used to meet the functional test of components. However, most manufacturers only provide the equipment number used for specific tests in the relevant manuals, and do not provide the relevant principles and test methods. Maintenance manufacturers can only design test equipment and circuits according to test requirements to meet the relevant test requirements in the component manual.

[0003] Actuator parts in civil aircraft are found in all major systems of civil aircraft, and in the process of civil aviation parts maintenance, part inspection and repair are the most important steps in the repair of parts. When testing actuator parts, most actuator parts need to be adjusted according to the speed of the motor, but the output shaft speed measurement equipment given in the manual is mostly self-developed equipment by OEM manufacturers, which makes the measurement of output shaft speed a technical problem for most maintenance units when repairing such parts. Summary of the invention

[0004] The object of the present invention is to provide a pulse counting system for measuring the rotational speed of the output shaft of a ram air actuator motor, thereby solving the aforementioned problems existing in the prior art.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] A pulse counting system for measuring the rotation speed of the output shaft of a ram air actuator motor comprises a counting circuit, a low voltage power supply and a high voltage power supply; the counting circuit comprises a counter, a switch, a triode, an AND gate, a first resistor, a second resistor, a third resistor and a pin; the power supply end of the counter is connected to the low voltage power supply, the first signal input end of the counter is connected to the emitter of the triode, the emitter of the triode is connected to the high voltage power supply via the first resistor, the second signal input end of the counter is connected to the collector of the triode, and the reset end of the counter is connected to the second signal input end via the switch; the high voltage power supply is connected to the pin via the third resistor, the base of the triode is connected in series with the second resistor and the AND gate in sequence, and then connected between the third resistor and the pin; the AND gate is connected to the low voltage power supply, and the pin is connected to a Hall sensor arranged on the output end of the actuator motor.

[0007] Preferably, the system comprises a first counting circuit and a second counting circuit;

[0008] The first counting circuit includes a first counter, a switch S10, a first transistor, a first AND gate, a resistor R6, a resistor R7, a resistor R4 and a pin U; ​​a power supply end of the first counter is connected to the low-voltage power supply, a first signal input end of the first counter is connected to the emitter of the first transistor, the emitter of the first transistor is connected to the high-voltage power supply via the resistor R6, a second signal input end of the first counter is connected to the collector of the first transistor, and a reset end of the first counter is connected to its second signal input end via the switch S10; the high-voltage power supply is connected to the pin U via the resistor R4, and the base of the first transistor is connected in series with the resistor R7 and the first AND gate in sequence, and then connected between the resistor R4 and the pin U;

[0009] The second counting circuit includes a second counter, a switch S11, a second triode, a second AND gate, a resistor R5, a resistor R8, a resistor R3 and a pin V; the power supply end of the second counter is connected to the low-voltage power supply, the first signal input end of the second counter is connected to the emitter of the second triode, the emitter of the second triode is connected to the high-voltage power supply via the resistor R5, the second signal input end of the second counter is connected to the collector of the second triode, and the reset end of the second counter is connected to its second signal input end via the switch S11; the high-voltage power supply is connected to the pin V via the resistor R3, and the base of the second triode is connected in series with the resistor R8 and the second AND gate in sequence, and then connected between the resistor R3 and the pin V;

[0010] The first and second AND gates are connected to a low voltage power supply; the pins U and V are connected to a Hall sensor disposed on the output end of the actuator motor.

[0011] Preferably, the switch S10 and the switch S11 are grounded.

[0012] Preferably, the second input terminal of the first counter and the second input terminal of the second counter are grounded.

[0013] Preferably, the low voltage power supply is 5V, and the high voltage power supply is 15V.

[0014] Preferably, the model of the first counter and the second counter is XL5155J, and the pulse amplitude is 3.5-5V.

[0015] Preferably, the model of the first transistor and the second transistor is S8550.

[0016] Preferably, the models of the first AND gate and the second AND gate are SN74LS08N.

[0017] Preferably, the resistance of each resistor is 2.5K.

[0018] The beneficial effects of the present invention are: it can realize the measurement of the motor output shaft speed when the actuator is running at high speed and low speed, meet the testing requirements of the components in the manual, solve the problem of difficulty in calculating the output shaft speed of such components, and improve the reliability of component maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of a pulse counting system in an embodiment of the utility model. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation methods described herein are only used to explain the present invention and are not used to limit the present invention.

[0021] In the present embodiment, a pulse counting system for measuring the rotation speed of the output shaft of a ram air actuator motor is provided, comprising a counting circuit, a low-voltage power supply, and a high-voltage power supply; the counting circuit comprises a counter, a switch, a triode, an AND gate, a first resistor, a second resistor, a third resistor, and a pin; the power supply end of the counter is connected to the low-voltage power supply, the first signal input end of the counter is connected to the emitter of the triode, the emitter of the triode is connected to the high-voltage power supply via the first resistor, the second signal input end of the counter is connected to the collector of the triode, and the reset end of the counter is connected to the second signal input end via the switch; the high-voltage power supply is connected to the pin via the third resistor, the base of the triode is connected in series with the second resistor and the AND gate in sequence, and then connected between the third resistor and the pin; the AND gate is connected to the low-voltage power supply, and the pin is connected to the Hall sensor arranged on the output end of the actuator motor.

[0022] In this embodiment, Figure 1 As shown, the system includes a first counting circuit and a second counting circuit;

[0023] The first counting circuit includes a first counter, a switch S10, a first transistor, a first AND gate, a resistor R6, a resistor R7, a resistor R4 and a pin U; ​​a power supply end of the first counter is connected to the low-voltage power supply, a first signal input end of the first counter is connected to the emitter of the first transistor, the emitter of the first transistor is connected to the high-voltage power supply via the resistor R6, a second signal input end of the first counter is connected to the collector of the first transistor, and a reset end of the first counter is connected to its second signal input end via the switch S10; the high-voltage power supply is connected to the pin U via the resistor R4, and the base of the first transistor is connected in series with the resistor R7 and the first AND gate in sequence, and then connected between the resistor R4 and the pin U;

[0024] The second counting circuit includes a second counter, a switch S11, a second triode, a second AND gate, a resistor R5, a resistor R8, a resistor R3 and a pin V; the power supply end of the second counter is connected to the low-voltage power supply, the first signal input end of the second counter is connected to the emitter of the second triode, the emitter of the second triode is connected to the high-voltage power supply via the resistor R5, the second signal input end of the second counter is connected to the collector of the second triode, and the reset end of the second counter is connected to its second signal input end via the switch S11; the high-voltage power supply is connected to the pin V via the resistor R3, and the base of the second triode is connected in series with the resistor R8 and the second AND gate in sequence, and then connected between the resistor R3 and the pin V;

[0025] The first and second AND gates are connected to a low voltage power supply; the pins U and V are connected to a Hall sensor disposed on the output end of the actuator motor.

[0026] The switch S10 and the switch S11 are grounded. The second input terminal of the first counter and the second input terminal of the second counter are grounded.

[0027] In this embodiment, the 1st and 2nd terminals of the first counter and the second counter are signal input terminals, and the falling edge of the pulse of the 1st and 2nd terminals is counted or short-circuited once to count once. The 1st terminal is high, and the 2nd terminal is low. The 9th and 10th terminals are power supply terminals, the 10th terminal is positive, and the 9th terminal is negative, respectively connected to the positive and negative electrodes of the low-voltage power supply. The 4th terminal is the reset terminal, and the 2nd and 4th terminals are short-circuited to reset.

[0028] In this embodiment, the model of the counter is XL5155J, and the pulse amplitude is 3.5-5V. The model of the transistor is S8550. The model of the AND gate is SN74LS08N. The resistance of each resistor is 2.5K. The low voltage power supply is 5V, and the high voltage power supply is 15V.

[0029] In this embodiment, a Hall sensor is installed at the output shaft end of the ram air actuator motor to be measured, and the shaft end speed is calculated by changing the position of the Hall sensor. The Hall sensor is connected to the pin, and then transmits the corresponding output signal to the upstream and downstream components, thereby realizing the counting of the shaft end speed. The Hall sensor controls the on and off of its internal circuit according to its position information, thereby controlling the corresponding signal output.

[0030] In this embodiment, Figure 1 It can be seen that the 5V low-voltage power supply is used to power the counter and the AND gate. The 15V high-voltage power supply is the main power supply. When the high-voltage power supply is turned on, the high-voltage voltage acts on the emitters of the first transistor and the second transistor respectively after being stepped down by resistors R6 and R5; and acts on the input ends of the first and second AND gates after being stepped down by resistors R4 and R3. Pins U and V are connected to the input ends of the first and second AND gates respectively, and are connected to the high-voltage power supply.

[0031] In this embodiment, when the motor rotates, after the counter is powered on, when the Hall sensor controls the internal circuit to be disconnected, the high-voltage power supply voltage enters the AND gate circuit after being stepped down by a resistor, and is output after the voltage is stabilized by the AND gate circuit, and enters the base of the transistor through resistor R7 or R8. At this time, there is voltage at the base of the transistor, and the transistor is turned on. A pulse falling edge will be generated at the counter terminals 1 and 2, and the counter will count once. In this process, the transistor is used as a switch.

[0032] When the Hall sensor controls the internal circuit to be turned on, the high-voltage power supply in the circuit will not act on the AND gate, but will be directly grounded through the pin U or the pin V. At this time, the transistor can only be in the disconnected state, and no pulse falling edge will be generated at the counter terminals 1 and 2, and the counter will not count.

[0033] When the component is in working mode, the transistor is continuously turned on and off through the internal circuit of the Hall sensor controller, and the falling edge of the pulse is continuously formed at the counter terminals 1 and 2, thereby realizing the measurement of the motor speed. The switch in the circuit can connect the counter terminals 2 and 4, and the counter can be cleared by closing the switch.

[0034] By adopting the above technical solution disclosed in the present invention, the following beneficial effects are obtained:

[0035] The utility model provides a pulse counting system for measuring the rotational speed of the motor output shaft of a ram air actuator, which can realize the measurement of the rotational speed of the motor output shaft when the actuator is running at high speed or low speed, meet the testing requirements of the components in the manual, solve the problem of difficulty in calculating the output shaft rotational speed of such components, and improve the reliability of component maintenance.

[0036] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be considered as the scope of protection of the present invention.

Claims

1. A pulse counting system for measuring the rotational speed of a ram air actuator motor output shaft, characterized in that: It comprises a counting circuit, a low-voltage power supply and a high-voltage power supply; the counting circuit comprises a counter, a switch, a triode, an AND gate, a first resistor, a second resistor, a third resistor and a pin; the power supply end of the counter is connected to the low-voltage power supply, the first signal input end of the counter is connected to the emitter of the triode, the emitter of the triode is connected to the high-voltage power supply via the first resistor, the second signal input end of the counter is connected to the collector of the triode, and the reset end of the counter is connected to its second signal input end via the switch; the high-voltage power supply is connected to the pin via the third resistor, the base of the triode is connected in series with the second resistor and the AND gate in sequence, and then connected between the third resistor and the pin; the AND gate is connected to the low-voltage power supply, and the pin is connected to the Hall sensor arranged on the output end of the actuator cylinder motor.

2. The pulse counting system for measuring the output shaft speed of a ram air actuator motor according to claim 1, characterized in that: The system includes a first counting circuit and a second counting circuit; The first counting circuit includes a first counter, a switch S10, a first transistor, a first AND gate, a resistor R6, a resistor R7, a resistor R4 and a pin U; ​​a power supply end of the first counter is connected to the low-voltage power supply, a first signal input end of the first counter is connected to the emitter of the first transistor, the emitter of the first transistor is connected to the high-voltage power supply via the resistor R6, a second signal input end of the first counter is connected to the collector of the first transistor, and a reset end of the first counter is connected to its second signal input end via the switch S10; the high-voltage power supply is connected to the pin U via the resistor R4, and the base of the first transistor is connected in series with the resistor R7 and the first AND gate in sequence, and then connected between the resistor R4 and the pin U; The second counting circuit includes a second counter, a switch S11, a second triode, a second AND gate, a resistor R5, a resistor R8, a resistor R3 and a pin V; the power supply end of the second counter is connected to the low-voltage power supply, the first signal input end of the second counter is connected to the emitter of the second triode, the emitter of the second triode is connected to the high-voltage power supply via the resistor R5, the second signal input end of the second counter is connected to the collector of the second triode, and the reset end of the second counter is connected to its second signal input end via the switch S11; the high-voltage power supply is connected to the pin V via the resistor R3, and the base of the second triode is connected in series with the resistor R8 and the second AND gate in sequence, and then connected between the resistor R3 and the pin V; The first and second AND gates are connected to a low voltage power supply; the pins U and V are connected to a Hall sensor disposed on the output end of the actuator motor.

3. The pulse counting system for measuring the rotational speed of the output shaft of the ram air actuator motor according to claim 2, characterized in that: The switch S10 and the switch S11 are grounded.

4. The pulse counting system for measuring the rotational speed of the output shaft of the ram air actuator motor according to claim 3, characterized in that: The second input terminal of the first counter and the second input terminal of the second counter are grounded.

5. The pulse counting system for measuring the rotational speed of the output shaft of the ram air actuator motor according to claim 2, characterized in that: The low voltage power supply is 5V, and the high voltage power supply is 15V.

6. The pulse counting system for measuring the rotational speed of the output shaft of the ram air actuator motor according to claim 2, characterized in that: The model of the first counter and the second counter is XL5155J, and the pulse amplitude is 3.5-5V.

7. The pulse counting system for measuring the rotational speed of the output shaft of the ram air actuator motor according to claim 2, characterized in that: The model of the first transistor and the second transistor is S8550.

8. The pulse counting system for measuring the rotational speed of the output shaft of a ram air actuator motor according to claim 2, characterized in that: The models of the first AND gate and the second AND gate are SN74LS08N.

9. The pulse counting system for measuring the rotational speed of the output shaft of the ram air actuator motor according to claim 2, characterized in that: The resistance of each resistor is 2.5K.

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