Motor state judgment method and motor state acquisition system

Abstract

The invention discloses a motor state judgment method and a motor state acquisition system. The method comprises the following steps: establishing a current time curve graph based on the energy storage condition of a circuit breaker motor; comparing the execution time waveform of the current peak state with a standard waveform according to the current time curve graph; extracting characteristic values in different energy storage defect states based on the vibration data in the energy storage process of the circuit breaker to obtain a typical defect map; a current acquisition circuit, a vibration acquisition circuit and a stroke acquisition circuit. And the current acquisition circuit, the vibration acquisition circuit and the stroke acquisition circuit are connected to the MCU through communication equipment to complete signal transmission. Through various analysis graphical representations and detection logics, a set of diagnosis method for the jamming state of the energy storage mechanism and the vibration condition of the energy storage spring is clarified, and assistance is provided for detection personnel. State analysis of the motor and the energy storage mechanism is acquired through a reasonably matched sensor to assist in judging whether the running state is normal or not.

Description

Technical Field

[0001] The present invention relates to the field of fire safety, and in particular to a motor state judgment method and a motor state acquisition system. Background Art

[0002] Abnormal energy storage is one of the common defects of circuit breakers, and its causes include abnormal motors, stuck mechanisms, and damaged components. The inspection guidance method for circuit breaker energy storage mechanisms in relevant regulations mainly checks whether the shaft pins, bearings, gears, springs and other components are in good condition and whether the lubrication between the components is good; the carbon brushes of the energy storage motor are not worn, and the motor should be free of abnormal noise, odor, overheating and other phenomena during operation. These inspection methods are highly subjective, and long-term on-site experience accumulation is required to discover whether there are hidden dangers in the energy storage mechanism. The state detection of the circuit breaker energy storage mechanism proposed in this project is mainly used to detect potential hidden dangers of circuit breakers and assist in evaluating the energy storage state of circuit breakers. Through the data collection of the entire process of circuit breaker energy storage, typical energy storage abnormality feature data is mined, the potential hidden dangers of the circuit breaker energy storage mechanism are digitized, and on-site maintenance personnel are assisted in diagnosing the state of the energy storage mechanism to improve the quality of on-site maintenance. In addition, a special circuit for the sensing part of the circuit breaker is systematically designed, and combined with the detection logic, an efficient energy storage maintenance logic is formed. Summary of the invention

[0003] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the title of the invention of this application to avoid blurring the purpose of this section, the abstract of the specification and the title of the invention, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0004] In view of the above problems and / or the problems existing in the prior art, the present invention is proposed.

[0005] Therefore, the technical problem to be solved by the present invention is to collect data of the entire energy storage process of the circuit breaker, mine typical energy storage abnormality feature data, realize the digitization of potential hidden dangers of the circuit breaker energy storage mechanism, assist on-site maintenance personnel in diagnosing the status of the energy storage mechanism, and improve the quality of on-site maintenance.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a method for determining the state of a motor, comprising:

[0007] As a preferred solution of the motor state judgment method described in the present invention, wherein: a current-time curve diagram is established based on the energy storage condition of the circuit breaker motor;

[0008] Compare the execution time waveform of the current peak state with the standard waveform according to the current time curve diagram;

[0009] Based on the vibration data of the circuit breaker energy storage process, the characteristic values ​​under different energy storage defect states are extracted to obtain the typical defect spectrum;

[0010] The problems of the energy storage mechanism are judged by combining the current-time curve analysis results and typical defect maps.

[0011] As a preferred solution of the motor state judgment method described in the present invention, the current peak value of the starting section is set as I p , the reaction start time waveform is positioned as T0, and the start time standard waveform is set as A;

[0012] Starting current peak I p , and the correlation between the reaction start time waveform T0 and the start time standard waveform A is used to reflect the internal transition process index of the coil.

[0013] As a preferred solution of the motor state judgment method described in the present invention, the current peak value of the idling section is set as I a , the reaction idling time waveform is positioned as T1, and the idling time standard waveform is positioned as B;

[0014] Starting current peak I a , and the correlation between the reaction start time waveform T1 and the idling time standard waveform B is used to reflect the motor's own characteristics and resistance size.

[0015] As a preferred solution of the motor state judgment method described in the present invention, the current peak value of the output section is set as I m , the reaction output time waveform is positioned as T2, and the idling time standard waveform is set as C;

[0016] Execution current peak I m , and the correlation between the execution start time waveform T2 and the idling time standard waveform C is used to reflect the index of motor spring performance.

[0017] As a preferred solution of the motor state judgment method described in the present invention, the energy storage problem range is given in combination with the change law of the current time curve diagram.

[0018] When the starting current peak value I p When the voltage becomes smaller and the fluctuation is larger, the motor tends to have a winding short circuit;

[0019] When the peak current of the idling section is a When it becomes smaller, the motor tends to have a stuck load;

[0020] When the peak current I m When the temperature changes to smaller, the energy storage linkage mechanism will jam the load.

[0021] As a preferred solution of the motor state judgment method described in the present invention, when the energy storage mechanism is stuck,

[0022] The time domain waveform of the motor vibration signal is amplitude modulated;

[0023] The low-frequency content of the Fourier-transformed vibration signal frequency domain waveform that is less than 50 Hz of the motor frequency is increased;

[0024] In the energy value of each frequency interval of wavelet packet transform, the energy of low-frequency content is higher than that of normal signal.

[0025] The beneficial effects of the present invention are as follows: through various analysis diagrams and detection logics, a set of diagnostic methods for the stuck state of the energy storage mechanism and the vibration of the energy storage spring is clearly defined, providing assistance to detection personnel.

[0026] Given that the detection method and judgment logic need to be based on the corresponding complete electrical signal interaction circuit.

[0027] Therefore, the technical problem to be solved by the present invention is to systematically design a special circuit of the circuit breaker sensing part, and cooperate with the detection logic to form an efficient energy storage maintenance logic.

[0028] In order to solve the above technical problems, the present invention also provides the following technical solutions: a motor state acquisition system, including the motor state judgment method, and a current acquisition circuit, including a capacitor;

[0029] A vibration collection circuit, including a MAX485ESA+T transceiver and an external sensor circuit;

[0030] The travel acquisition circuit includes a CN2 terminal;

[0031] The current acquisition circuit, vibration acquisition circuit, and travel acquisition circuit are all connected to the STM32F429VET6 chip through communication equipment to complete signal transmission.

[0032] As a preferred solution of the motor state acquisition system of the present invention, wherein: the current acquisition circuit is connected to the circuit board via pin 3 on the U11 interface, and is connected in parallel with a filter capacitor, namely the capacitor;

[0033] The electrical signal of the current acquisition circuit is transmitted to the PA0 pin of the STM32F429VET6 chip through the OUT A interface.

[0034] As a preferred solution of the motor state acquisition system described in the present invention, wherein: the MAX485ESA+T transceiver completes the interaction with the STM32F429VET6 chip through the receiving port UART2_RX and the sending port UART2_TX;

[0035] The sensor circuit includes a piezoelectric accelerometer ZX-XH2.54-4PZZ. The electrical signal generated by the piezoelectric accelerometer ZX-XH2.54-4PZZ is adjusted by a terminal matching resistor and a decoupling capacitor, and bus transmission is completed through a MAX485ESA+T transceiver.

[0036] As a preferred solution of the motor state acquisition system described in the present invention, wherein: the travel acquisition circuit is connected to PC9 and PA8 on the STM32F429VET6 chip through the CBM_SCL_B clock pin and the CBM_SDA_B data pin on the CN2 terminal to complete the interaction, and the two pins are respectively connected to the positive power supply through the first pull-up resistor and the second pull-up resistor to maintain the high level state during driving;

[0037] The control signal input pins CBM_DIR_B, CBM_GPO_B and OUTPWM_ADC_B on the CN2 terminal are respectively connected to PC8, PA6 and PC7 on the STM32F429VET6 chip for executing control instructions.

[0038] The beneficial effect of the present invention is that the state analysis of the motor and the energy storage mechanism is collected by reasonably matched sensors to assist in judging whether the operating state is normal. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0040] Figure 1 A current-time curve diagram under normal state in a motor state judgment method according to an embodiment of the present invention;

[0041] Figure 2 A current-time curve diagram of a starting section of a motor state judgment method according to an embodiment of the present invention;

[0042] Figure 3 A current-time curve diagram of an idling section of a motor state judgment method according to an embodiment of the present invention;

[0043] Figure 4 A current-time curve diagram of an execution stage of a motor state judgment method according to an embodiment of the present invention;

[0044] Figure 5A time domain waveform diagram of a vibration signal in a stuck state in a motor state judgment method according to an embodiment of the present invention;

[0045] Figure 6 A Fourier transform frequency domain analysis diagram of a vibration signal in a stuck state in a motor state judgment method according to an embodiment of the present invention;

[0046] Figure 7 A wavelet packet energy distribution diagram under a stuck state in a motor state judgment method according to an embodiment of the present invention;

[0047] Figure 8 A current acquisition circuit diagram of a motor state acquisition system according to an embodiment of the present invention;

[0048] Fig. 9 A vibration collection circuit diagram of a motor state collection system according to an embodiment of the present invention;

[0049] Fig.10 A stroke acquisition circuit diagram of a motor state acquisition system according to an embodiment of the present invention;

[0050] Fig.11 A schematic diagram of the pin distribution of an STM32 chip in a motor state acquisition system according to an embodiment of the present invention;

[0051] Fig.12 A vibration monitoring circuit diagram of a motor state judgment method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0052] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0053] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0054] Secondly, the present invention is described in detail with reference to schematic diagrams. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0055] Furthermore, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0056] Example 1

[0057] Reference Figure 1 , this embodiment provides a method for determining a motor state, including establishing a current-time curve diagram based on the energy storage condition of the circuit breaker motor;

[0058] Compare the execution time waveform of the current peak state with the standard waveform according to the current time curve diagram;

[0059] Based on the vibration data of the circuit breaker energy storage process, the characteristic values ​​under different energy storage defect states are extracted to obtain the typical defect spectrum;

[0060] The problems of the energy storage mechanism are judged by combining the current-time curve analysis results and typical defect maps.

[0061] ① The motor current curve is used to analyze whether the motor is running normally, whether the motor power is sufficient, whether the energy storage mechanism is stuck, etc., and whether the reverse energy storage spring is weak.

[0062] ②The vibration data of the entire energy storage process of the circuit breaker is collected through sensors, and the data is transformed to extract the characteristic values ​​under different energy storage defect states, and a typical defect map is obtained to provide auxiliary diagnosis means for maintenance personnel.

[0063] Carry out comprehensive diagnosis by combining technical route ① and technical route ②.

[0064] Example 2

[0065] Reference Figure 5 , which is the second embodiment of the present invention, is based on the previous embodiment, and is different from the previous embodiment in that the current peak value of the startup section is set to I p , the reaction start time waveform is positioned as T0, and the start time standard waveform is set as A;

[0066] Starting current peak I p , and the correlation between the reaction start time waveform T0 and the start time standard waveform A is used to reflect the internal transition process index of the coil.

[0067] The peak current of the idling section is defined as I a , the reaction idling time waveform is positioned as T1, and the idling time standard waveform is positioned as B;

[0068] Starting current peak I a, and the correlation between the reaction start time waveform T1 and the idling time standard waveform B is used to reflect the motor's own characteristics and resistance size.

[0069] The peak current of the output section is set as I m , the reaction output time waveform is positioned as T2, and the idling time standard waveform is set as C;

[0070] Execution current peak I m , and the correlation between the execution start time waveform T2 and the idling time standard waveform C is used to reflect the index of motor spring performance.

[0071] Through the above series of assumed values, corresponding to the analysis diagram status, a valid motor state matrix is ​​formed, and the scope and nature of the problem are confirmed through these numerical changes.

[0072] Example 3

[0073] Reference Figure 5 , which is the third embodiment of the present invention, is based on the previous embodiment, and is different from the previous embodiment in that: combining the changing law of the current-time curve diagram, the scope of the energy storage problem is given,

[0074] When the starting current peak value I p When the voltage becomes smaller and the fluctuation is larger, the motor tends to have a winding short circuit; I p T0 and T2 can be used to determine whether the coil has short circuit, open circuit or poor contact, which may affect the starting performance of the motor.

[0075] When the peak current of the idling section is a When the load becomes smaller, the motor tends to have a stuck load; I a T1 and T2 can be used to determine whether the motor is idling smoothly, and whether the rotor has faults such as jamming, deformation or wear, which affect the operating efficiency of the motor.

[0076] When the peak current I m When the load changes, the energy storage linkage mechanism is stuck; I m T2 and T3 can be used to determine whether the motor has insufficient output, whether the closing spring is broken, loose, or has lost its elasticity, which affects the reliability of the closing action.

[0077] Example 4

[0078] Reference Figure 5 , which is the fourth embodiment of the present invention, is based on the previous embodiment, and is different from the previous embodiment in that:

[0079] When the energy storage mechanism is stuck,

[0080] The time domain waveform of the motor vibration signal is amplitude modulated;

[0081] The low-frequency content of the Fourier-transformed vibration signal frequency domain waveform that is less than 50 Hz of the motor frequency is increased;

[0082] In the energy value of each frequency interval of wavelet packet transform, the energy of low-frequency content is higher than that of normal signal.

[0083] The various states corresponding to the analysis chart can be confirmed through the above experimental data results, and finally implemented to improve the monitoring efficiency. It can be clearly seen from the attached figure that the change logic and value of each data are different.

[0084] Example 5

[0085] Reference Figure 5 , which is the fifth embodiment of the present invention, and this embodiment provides a motor state acquisition system. This embodiment is based on the previous embodiment, and the difference from the previous embodiment is that:

[0086] The current collection circuit 100 includes a capacitor C117;

[0087] A vibration collection circuit 200 includes a MAX485ESA+T transceiver and a sensor circuit 201 connected thereto;

[0088] The travel acquisition circuit 300 includes a CN2 terminal;

[0089] The current collection circuit 100, the vibration collection circuit 200, and the travel collection circuit 300 are all connected to the STM32F429VET6 chip through communication equipment to complete signal transmission.

[0090] In this design, STM32F429VET6 is used as the controller and computing unit, and the sensors mainly used are current sensor, vibration sensor, and magnetic encoder, which correspond to current acquisition circuit 100, vibration acquisition circuit 200, and travel acquisition circuit 300 respectively.

[0091] Example 6

[0092] Reference Figure 5 , which is the sixth embodiment of the present invention, and is based on the previous embodiment, and is different from the previous embodiment in that: the current acquisition circuit 100, which can also be called the current monitoring circuit, is connected to the circuit board through the No. 3 pin on the U11 interface, and is connected in parallel with a filter capacitor, namely, capacitor C117;

[0093] The electrical signal of the current acquisition circuit 100 is transmitted to the PA0 pin of the STM32F429VET6 chip through the OUT A interface.

[0094] The core function of this part is to conduct high-precision, wide-range real-time monitoring and collection of the current of the energy storage motor, providing key data support for the system's energy efficiency management, fault warning and precise control.

[0095] The specially reserved interface U11 provides convenience for the access of the current sensor, which not only enhances the scalability and flexibility of the system, but also simplifies the installation and debugging process of the sensor. The current sensor is connected to the circuit board through the pin 3 of the U11 interface, and the weak signal output by it is filtered by the C117 capacitor to eliminate noise and interference, ensuring the accuracy and stability of the data.

[0096] In this design, the traditional current transformer is abandoned and the current sensor is used. Not only because the current sensor can detect both AC and DC currents at the same time, thus greatly broadening the measurement range, but also because of its high precision, low drift and fast response characteristics, the system can more accurately capture the current changes, providing a strong guarantee for subsequent energy efficiency analysis and precise control.

[0097] Through the I_OUT_A interface, the filtered current signal is stably transmitted to the PA0 pin of the STM32F429VET6 chip, realizing efficient communication and data transmission between the current acquisition part and the MCU. This current acquisition design not only improves the measurement accuracy and adaptability of the system, but also provides a solid foundation for subsequent energy efficiency management and precise control.

[0098] By using current sensors and filtering circuits, wide-range, high-precision real-time monitoring of the energy storage motor current is successfully achieved, making an important contribution to the overall performance improvement and reliability assurance of the system. The output pin of the current sensor is connected through the current monitoring circuit and the current sensor is powered. Due to the uniqueness of the current sensor, the ADC pin is directly used in this design to read the voltage value, and the current current value can be obtained by converting it according to the corresponding formula:

[0099] HAL_ADC_Start_DMA(&hadc1,(uint32_t*)&AD_Value,1)

[0100] This function can be used to read the data of the ADC channel into AD_Value for data processing.

[0101] Example 7

[0102] Reference Figure 5 , which is the seventh embodiment of the present invention, and this embodiment is based on the previous embodiment, and is different from the previous embodiment in that: the MAX485ESA+T transceiver completes the interaction with the STM32F429VET6 chip through the receiving port UART2_RX and the sending port UART2_TX;

[0103] The sensor circuit 201 includes a piezoelectric accelerometer ZX-XH2.54-4PZZ. The electrical signal generated by the piezoelectric accelerometer ZX-XH2.54-4PZZ is adjusted by a terminal matching resistor R177 and a decoupling capacitor C109, and the bus transmission is completed through a MAX485ESA+T transceiver.

[0104] The main function of this part is to monitor and collect data from vibration sensors in real time, providing key information for system fault warning, status monitoring and energy efficiency analysis.

[0105] Among them, the MAX485ESA+T transceiver is the core of the communication interface. In terms of communication protocol, the vibration data acquisition part innovatively adopts the RS485modbus communication protocol. This choice not only improves the reliability and stability of data transmission, but also reduces the overall power consumption of the system. By connecting with the MCU's UART2_RX (receive) and UART2_TX (transmit) interfaces, efficient communication and data transmission between the vibration data acquisition part and the STM32F429VET6 chip are achieved.

[0106] The vibration sensor receives a stable 12V power supply through the U52 interface and outputs vibration signals through pins 1 and 2 of the interface. This design not only simplifies the sensor connection and debugging process, but also improves the scalability and flexibility of the system.

[0107] The vibration data acquisition part, with its unique design, efficient communication protocol and stable power management, successfully realizes real-time monitoring and accurate collection of vibration sensor data. This innovative design not only improves the overall performance of the system, but also provides strong data support for subsequent fault warning, status monitoring and energy efficiency analysis.

[0108] The waveform generated by the vibration sensor can be amplified by the vibration monitoring circuit, and the vibration condition can be inferred from the change in voltage value. During vibration detection, the data can be averaged and filtered by the following function: TxRx_data_handler zd_operation(void){

[0109] TxRx_data_handler data;

[0110] uint64_t zd_sum[4]={0}; / / Store the total data of the vibration sensor 100 times

[0111] for(uint8_t i=0;i<100;i++){

[0112] zd_sum[0]+=ReadADCValue(ADC_CHANNEL_6);

[0113] }

[0114] data.zd1 = zd_sum[0] / 100;

[0115] return data;

[0116] / / my_data_frame(data);

[0117] }

[0118] The above functions are used to prevent abnormal errors from causing program misjudgment.

[0119] Example 8

[0120] Reference Figure 5 , which is the eighth embodiment of the present invention, and is based on the previous embodiment, and is different from the previous embodiment in that: the travel acquisition circuit 300 is connected to PC9 and PA8 on the STM32F429VET6 chip through the CBM_SCL_B clock pin and the CBM_SDA_B data pin on the CN2 terminal to complete the interaction, and the two pins are respectively connected to the positive power supply through the first pull-up resistor R188 and the second pull-up resistor R187 to maintain a high level state during driving;

[0121] The control signal input pins on the CN2 terminal, CBM_DIR_B, CBM_GPO_B and OUTPWM_ADC_B are respectively connected to PC8, PA6, PC7 on the STM32F429VET6 chip for executing control instructions.

[0122] By adopting an innovative indirect measurement method, the complexity and limitations of direct measurement are overcome. This method cleverly uses magnets to adsorb on the gear axis and indirectly obtains the rotation of the axis by measuring the change in the magnetic field, thereby achieving accurate monitoring of the circuit breaker stroke. The magnetic encoder can collect the rotation of the shaft, thereby obtaining the operation of the mechanical structure. This module uses IIC to read data, but because hardware IIC may have errors, software IIC is used in this design, and this part of the stroke data collection is completed through the corresponding special interactive circuit.

[0123] The CN2 terminal is used as the sensor connection interface to ensure the stability and accuracy of the measurement. In terms of power supply, full consideration is given to compatibility and flexibility, and two power supply options of 3.3V and 5V are provided. The power supply is switched through the R190 and R191 resistors to meet the needs of different sensors and circuits.

[0124] In terms of communication, the IIC communication protocol is connected to the PC9 and PA8 pins of the STM32F429VET6 chip through the 2nd and 3rd pins of the CN2 terminal (marked as CBM_SCL_B and CBM_SDA_B respectively), achieving efficient and stable data transmission. This design not only improves the speed and reliability of data transmission, but also reduces the overall power consumption of the system.

[0125] In addition, the CN2 terminal also includes three setting pins: CBM_DIR_B, CBM_GPO_B and OUTPWM_ADC_B, which are connected to the PC8, PA6 and PC7 pins of the STM32F429VET6 chip respectively. The setting of these three pins not only provides more control and configuration options for the system, but also enhances the scalability of the system.

[0126] Through indirect measurement methods, flexible power supply options and efficient IIC communication protocol, this design successfully achieved accurate monitoring of circuit breaker travel and real-time data transmission. This design not only improves the overall performance and reliability of the system, but also provides strong data support for subsequent fault warning, status monitoring and energy efficiency analysis.

[0127] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0128] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0129] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0130] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A method for determining a motor state, characterized in that: include, Establish a current-time curve diagram based on the circuit breaker motor energy storage situation; Compare the execution time waveform of the current peak state with the standard waveform according to the current time curve diagram; Based on the vibration data of the circuit breaker energy storage process, the characteristic values ​​under different energy storage defect states are extracted to obtain the typical defect spectrum; The problems of the energy storage mechanism are judged by combining the current-time curve analysis results and typical defect maps.

2. A motor state determination method according to claim 1, characterized in that: The peak current of the startup phase is defined as I p , the reaction start time waveform is positioned as T0, and the start time standard waveform is set as A; Starting current peak I p , and the correlation between the reaction start time waveform T0 and the start time standard waveform A is used to reflect the internal transition process index of the coil.

3. A motor state determination method according to claim 2, characterized in that: The peak current of the idling section is defined as I a , the reaction idling time waveform is positioned as T1, and the idling time standard waveform is positioned as B; Starting current peak I a , and the correlation between the reaction start time waveform T1 and the idling time standard waveform B is used to reflect the motor's own characteristics and resistance size.

4. A motor state determination method according to claim 3, characterized in that: The peak current of the output section is set as I m , the reaction output time waveform is positioned as T2, and the idling time standard waveform is set as C; Execution current peak I m , and the correlation between the execution start time waveform T2 and the idling time standard waveform C is used to reflect the index of motor spring performance.

5. A motor state determination method according to claim 4, characterized in that: Combined with the changing law of the current-time curve, the scope of the energy storage problem is given. When the starting current peak value I p When the voltage becomes smaller and the fluctuation is larger, the motor tends to have a winding short circuit; When the peak current of the idling section is a When it becomes smaller, the motor tends to have a stuck load; When the peak current I m When the temperature changes to smaller, the energy storage linkage mechanism will jam the load.

6. A motor state determination method according to claim 4, characterized in that: When the energy storage mechanism is stuck, The time domain waveform of the motor vibration signal is amplitude modulated; The low-frequency content of the Fourier-transformed vibration signal frequency domain waveform that is less than 50 Hz of the motor frequency is increased; In the energy value of each frequency interval of wavelet packet transform, the energy of low-frequency content is higher than that of normal signal.

7. A motor state acquisition system, used based on the motor state judgment method according to claim 6, characterized in that: A current collection circuit (100) includes a capacitor (C117); A vibration collection circuit (200) includes a MAX485ESA+T transceiver and a sensor circuit (201) connected thereto; The travel acquisition circuit (300) comprises a CN2 terminal; The current collection circuit (100), the vibration collection circuit (200), and the travel collection circuit (300) are all connected to the STM32F429VET6 chip via a communication device to complete signal transmission.

8. A motor state acquisition system according to claim 7, characterized in that: The current collection circuit (100) is connected to the circuit board via pin 3 on the U11 interface, and is connected in parallel with a filter capacitor, namely the capacitor (C117); The electrical signal of the current acquisition circuit (100) is transmitted to the PA0 pin of the STM32F429VET6 chip via the OUT A interface.

9. A motor state acquisition system according to claim 8, characterized in that: The MAX485ESA+T transceiver completes the interaction with the STM32F429VET6 chip through the receiving port UART2_RX and the sending port UART2_TX; The sensor circuit (201) comprises a piezoelectric accelerometer ZX-XH2.54-4PZZ. The electrical signal generated by the piezoelectric accelerometer ZX-XH2.54-4PZZ is adjusted by a terminal matching resistor (R177) and a decoupling capacitor (C109), and bus transmission is completed through a MAX485ESA+T transceiver.

10. A motor state acquisition system according to claim 9, characterized in that: The travel acquisition circuit (300) is connected to PC9 and PA8 on the STM32F429VET6 chip via the CBM_SCL_B clock pin and the CBM_SDA_B data pin on the CN2 terminal to complete the interaction, and the two pins are respectively connected to the positive power supply via the first pull-up resistor (R188) and the second pull-up resistor (R187) to maintain a high level state during driving; The control signal input pins CBM_DIR_B, CBM_GPO_B and OUTPWM_ADC_B on the CN2 terminal are respectively connected to PC8, PA6 and PC7 on the STM32F429VET6 chip for executing control instructions.

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