阅读说明：本技术 一种机电产品高可靠的解锁方法 (High-reliability unlocking method for electromechanical product ) 是由 吴昊 任梦晴 王晓卿 郭志 柯四十 王飞 于 2019-10-22 设计创作，主要内容包括：本发明公开了一种机电产品高可靠的解锁方法,它是利用驱动件的正反向脉冲带动机电产品结构中传动件的应力释放,使得机电产品的锁紧部分可以顺利解锁。解锁时,在控制电路输出解锁指令后,机电产品尝试进行第一次解锁,在解锁过程中若出现电流报警或超时报警时即停止当次尝试,相应的堵转计数器加1,控制电路判断堵转计数器数值或超时计数器数值是否不小于3,即解锁尝试次数是否超过3次,若尝试次数小于3次则在再次解锁开始前控制电路给驱动芯片发送一个反向脉冲,使驱动件反向堵转。本发明的解锁一共进行3次,对产品问题具有冗余,解锁时使用反向脉冲使传动件应力释放,改善产品的使用状态,提高产品可靠性。(The invention discloses a high-reliability unlocking method for an electromechanical product, which utilizes forward and reverse pulses of a driving piece to drive the stress release of a driving piece in the electromechanical product structure, so that the locking part of the electromechanical product can be unlocked smoothly. When unlocking, after the control circuit outputs an unlocking instruction, the electromechanical product tries to unlock for the first time, in the unlocking process, if current alarm or overtime alarm occurs, the current attempt is stopped, 1 is added to a corresponding locked-rotor counter, the control circuit judges whether the value of the locked-rotor counter or the value of the overtime counter is not less than 3, namely, whether the unlocking attempt time exceeds 3, if the attempt time is less than 3, the control circuit sends a reverse pulse to the driving chip before unlocking is started again, and the driving piece is enabled to be locked-rotor reversely. The unlocking of the invention is carried out for 3 times in total, the product problem is redundant, the stress of the transmission part is released by using the reverse pulse during the unlocking, the use state of the product is improved, and the reliability of the product is improved.)

1. A high-reliability unlocking method for an electromechanical product is characterized by comprising the following steps: the method comprises the following specific steps:

A. defining a signal loaded by a control circuit as a forward pulse when the driving piece is unlocked, and defining a signal loaded by the control circuit as a reverse pulse when the driving piece is locked;

B. after the control circuit outputs an unlocking instruction, the electromechanical product tries to unlock for the first time, a signal loaded on the driving piece by the control circuit is a positive pulse when the electromechanical product is unlocked for the first time, the full torque (namely 100% rated torque) of the driving piece is used for driving the mechanical transmission piece to unlock, and the electromechanical product can finish unlocking in the trial usually;

C. when the resistance is overlarge due to overlarge stress between transmission parts and exceeds the full torque of the driving part, the current value is overlarge at the moment, current information is fed back to the current signal processing circuit, a current locked-rotor mark introduced by the control circuit is set to be 1, the action failure is shown, and meanwhile, a locked-rotor counter is added with 1;

D. then the control circuit delays for 2s so as to release the locked rotor heat of the driving piece, and then the control circuit judges whether the locked rotor counter value is not less than 3, namely whether the trial frequency exceeds 3;

E. if the value of the locked-rotor counter is less than 3, the control circuit enters a table _ down2 function, a microcontroller in the control circuit enables a driving chip to be enabled reversely, a reverse pulse signal with the duration of 300ms is sent to the driving piece, and the current locked-rotor flag is reset at the same time, at the moment, the driving piece can use full torque to act towards the locking direction, in the process, the stress between the driving pieces is reduced along with the locking action, then the control circuit loads forward pulses on the driving piece again, the full torque of the driving piece is used for driving the mechanical driving piece to unlock, if the unlocking fails, the current locked-rotor flag introduced by the control circuit is set to be 1, the action failure is indicated, and meanwhile, the locked-rotor counter is added by 1;

F. if the locked-rotor counter value is not less than 3, the control circuit sends unlocking current alarm information to the superior system, and unlocking operation fails.

2. The highly reliable unlocking method for the electromechanical product according to claim 1, wherein: the driving piece is electrically driven and is one of a direct current torque motor or a direct current servo motor.

3. The highly reliable unlocking method for the electromechanical product according to claim 1, wherein: the electromechanical product is electrically driven and controls the mechanical structure to act.

4. The highly reliable unlocking method for the electromechanical product according to claim 1, wherein: in the locking mode, the electric mechanical moving part is in contact with the locked part and applies pressure, and finally the locked part reaches a locking state.

Technical Field

The invention relates to the technical field of precision measurement, in particular to a high-reliability unlocking method for an electromechanical product.

Background

In the use process of electromechanical products in many systems, mechanical environments such as vibration and impact exist, and the external force affects the performance of the systems and seriously damages the system structures. In order to improve the reliability of the systems, the systems add a locking function to the electromechanical products to resist the influence of external force.

Generally, the mechanical transmission member is driven by the driving member to make the mechanical moving member of the locking portion contact with the locked member and apply pressure, so that the locked member finally reaches a locked state. When the electromechanical product is in a locking state for a long time, the strain between the transmission parts generates stress, the stress directly acts on the mechanical motion part, so that the force required to be greater than the force required to be used for locking during unlocking is used for unlocking, and when the stress action is serious, the resistance during unlocking is greater than the output force of the driving part, so that the unlocking work of the electromechanical product fails, and the normal use of the product is influenced.

Disclosure of Invention

The invention aims to provide a high-reliability unlocking method of an electromechanical product, which is convenient and easy to operate and strong in operability.

The purpose of the invention is realized as follows:

a high-reliability unlocking method for an electromechanical product is characterized in that: the method comprises the following specific steps:

A. defining a signal loaded by a control circuit as a forward pulse when the driving piece is unlocked, and defining a signal loaded by the control circuit as a reverse pulse when the driving piece is locked;

B. after the control circuit outputs an unlocking instruction, the electromechanical product tries to unlock for the first time, a signal loaded on the driving piece by the control circuit is a positive pulse when the electromechanical product is unlocked for the first time, the full torque (namely 100% rated torque) of the driving piece is used for driving the mechanical transmission piece to unlock, and the electromechanical product can finish unlocking in the trial usually;

C. when the resistance is overlarge due to overlarge stress between transmission parts and exceeds the full torque of the driving part, the current value is overlarge at the moment, current information is fed back to the current signal processing circuit, a current locked-rotor mark introduced by the control circuit is set to be 1, the action failure is shown, and meanwhile, a locked-rotor counter is added with 1;

D. then the control circuit delays for 2s so as to release the locked rotor heat of the driving piece, and then the control circuit judges whether the locked rotor counter value is not less than 3, namely whether the trial frequency exceeds 3;

E. if the value of the locked-rotor counter is less than 3, the control circuit enters a table _ down2 function, a microcontroller in the control circuit enables a driving chip to be enabled reversely, a reverse pulse signal with the duration of 300ms is sent to the driving piece, and the current locked-rotor flag is reset at the same time, at the moment, the driving piece can use full torque to act towards the locking direction, in the process, the stress between the driving pieces is reduced along with the locking action, then the control circuit loads forward pulses on the driving piece again, the full torque of the driving piece is used for driving the mechanical driving piece to unlock, if the unlocking fails, the current locked-rotor flag introduced by the control circuit is set to be 1, the action failure is indicated, and meanwhile, the locked-rotor counter is added by 1;

F. if the locked-rotor counter value is not less than 3, the control circuit sends unlocking current alarm information to the superior system, and unlocking operation fails.

The driving piece is electrically driven, is one of a direct-current torque motor or a direct-current servo motor, and has the characteristic that the output torque is positively correlated with the output current and the output voltage.

The electromechanical product is electrically driven and controls the mechanical structure to act.

In the locking mode, the electric mechanical moving part is in contact with the locked part and applies pressure, and finally the locked part reaches a locking state.

The invention utilizes the forward and reverse pulses of the driving piece to drive the stress release of the driving piece in the electromechanical product structure, so that the locking part of the electromechanical product can be unlocked smoothly. When unlocking, after the control circuit outputs an unlocking instruction, the electromechanical product tries to unlock for the first time, in the unlocking process, if current alarm or overtime alarm occurs, the current attempt is stopped, 1 is added to a corresponding locked-rotor counter, the control circuit judges whether the value of the locked-rotor counter or the value of the overtime counter is not less than 3, namely, whether the unlocking attempt time exceeds 3, if the attempt time is less than 3, the control circuit sends a reverse pulse to the driving chip before unlocking is started again, and the driving piece is enabled to be locked-rotor reversely.

The invention has the advantages that:

1. the forward and reverse pulses of the driving piece are utilized to drive the stress release of a driving piece in the electromechanical product structure, so that the locking part of the electromechanical product can be unlocked smoothly;

2. the unlocking is carried out for 3 times, the product problem is redundant, the reverse pulse is used for releasing the stress of the transmission piece during the unlocking, the use state of the electromechanical product is improved, and the reliability of the electromechanical product is improved;

3. the operation is convenient and easy to realize, the operability is strong, and the method has high operability on electromechanical products in a long-term locking state.

Drawings

FIG. 1 is a block circuit diagram of the present invention;

fig. 2 is a block flow diagram of the present invention.

The specific implementation mode is as follows:

the present invention will be described in further detail with reference to the following examples and drawings.

A high-reliability unlocking method for an electromechanical product comprises the following specific steps:

A. defining a signal loaded by a control circuit as a forward pulse when the driving piece is unlocked, and defining a signal loaded by the control circuit as a reverse pulse when the driving piece is locked;

B. after the control circuit outputs an unlocking instruction, the electromechanical product tries to unlock for the first time, a signal loaded on the driving piece by the control circuit is a positive pulse when the electromechanical product is unlocked for the first time, the full torque (namely 100% rated torque) of the driving piece is used for driving the mechanical transmission piece to unlock, and the electromechanical product can finish unlocking in the trial usually;

C. when the resistance is overlarge due to overlarge stress between transmission parts and exceeds the full torque of the driving part, the current value is overlarge at the moment, current information is fed back to the current signal processing circuit, a current locked-rotor mark introduced by the control circuit is set to be 1, the action failure is shown, and meanwhile, a locked-rotor counter is added with 1;

D. then the control circuit delays for 2s so as to release the locked rotor heat of the driving piece, and then the control circuit judges whether the locked rotor counter value is not less than 3, namely whether the trial frequency exceeds 3;

E. if the value of the locked-rotor counter is less than 3, the control circuit enters a table _ down2 function, a microcontroller in the control circuit enables a driving chip to be enabled reversely, a reverse pulse signal with the duration of 300ms is sent to the driving piece, and the current locked-rotor flag is reset at the same time, at the moment, the driving piece can use full torque to act towards the locking direction, in the process, the stress between the driving pieces is reduced along with the locking action, then the control circuit loads forward pulses on the driving piece again, the full torque of the driving piece is used for driving the mechanical driving piece to unlock, if the unlocking fails, the current locked-rotor flag introduced by the control circuit is set to be 1, the action failure is indicated, and meanwhile, the locked-rotor counter is added by 1;

F. if the locked-rotor counter value is not less than 3, the control circuit sends unlocking current alarm information to the superior system, and unlocking operation fails.

The driving piece is electrically driven, is one of a direct current torque motor or a direct current stepping motor, and has the characteristic that the output torque is positively correlated with the output current and the output voltage.

The electromechanical product is electrically driven and controls the mechanical structure to act.

In the locking mode, the electric mechanical moving part is in contact with the locked part and applies pressure, and finally the locked part reaches a locking state.