阅读说明：本技术 泵体的检测方法、系统、泵体及可读存储介质 (Pump body detection method and system, pump body and readable storage medium ) 是由 王得利 葛笑 于 2019-02-27 设计创作，主要内容包括：本发明的实施例提供了一种泵体的检测方法、系统、泵体及可读存储介质,泵体的检测方法包括：获取泵体的反馈转速ω<Sub>fl</Sub>,根据反馈转速ω<Sub>fl</Sub>计算出泵体的上限功率P<Sub>1</Sub>(ω<Sub>fl</Sub>)及泵体的下限功率P<Sub>2</Sub>(ω<Sub>fl</Sub>)；获取泵体内的电机的输出功率P<Sub>mo</Sub>；判断P<Sub>1</Sub>(ω<Sub>fl</Sub>)≥P<Sub>mo</Sub>≥P<Sub>2</Sub>(ω<Sub>fl</Sub>)是否成立；基于P<Sub>1</Sub>(ω<Sub>fl</Sub>)≥P<Sub>mo</Sub>≥P<Sub>2</Sub>(ω<Sub>fl</Sub>)不成立的情况下,判定泵体为空转状态。本发明通过对反馈转速ωfl及电机的输出功率Pmo的获取,可以直接检测到泵体是否发生空转,以使得在电机发生空转时,可以及时停止运行,避免因空转对泵体造成的损害。(The embodiment of the invention provides a pump body detection method, a pump body detection system, a pump body and a readable storage medium, wherein the pump body detection method comprises the following steps: obtaining the feedback rotation speed omega of the pump body fl According to the feedback rotation speed omega fl Calculating the upper limit power P of the pump body 1 (ω fl ) And lower limit power P of pump body 2 (ω fl ) (ii) a Obtaining the output power P of the motor in the pump body mo (ii) a Judgment of P 1 (ω fl )≥P mo ≥P 2 (ω fl ) Whether the result is true or not; based on P 1 (ω fl )≥P mo ≥P 2 (ω fl ) If the state is not satisfied, it is determined that the pump is in an idling state. According to the invention, through obtaining the feedback rotating speed omega fl and the output power Pmo of the motor, whether the pump body idles can be directly detected, so that when the motor idles, the operation can be stopped in time, and the damage to the pump body caused by idling is avoided.)

1. A method of inspecting a pump body, comprising:

s102, obtaining a feedback rotating speed omega of the pump body_flAccording to said feedback rotation speed omega_flCalculating the upper limit power P of the pump body₁(ω_fl) And a lower limit power P of the pump body₂(ω_fl)；

S104, acquiring the output power P of the motor in the pump body_mo；

S106, judging P₁(ω_fl)≥P_mo≥P₂(ω_fl) Whether the result is true or not;

s108, based on P₁(ω_fl)≥P_mo≥P₂(ω_fl) If the state is not satisfied, it is determined that the pump is in an idling state.

2. The method for detecting a pump body according to claim 1, wherein the S102 includes:

s202, obtaining the feedback rotating speed omega_flChoosing a constant k₁And k₂Wherein k is₁And k₂K for selection according to the margin required for the operation of the pump body₁＞k₂；

S204, according to the feedback rotating speed omega_fl、k₁、k₂Calculating the upper limit power P₁(ω_fl) And the lower limit power P₂(ω_fl) Wherein the upper limit power P₁(ω_fl) The calculation formula of (2) is as follows:

P₁(ω_fl)＝k₁×ω_fl ³，

the lower limit power P₂(ω_fl) The calculation formula of (2) is as follows:

P₂(ω_fl)＝k₂×ω_fl ³。

3. the method for detecting a pump body according to claim 2, further comprising, after S202:

s304, judging the feedback rotating speed omega_flWhether or not it is greater than the preset limit rotation speed omega_bd；

S306, based on the feedback rotating speed omega_flGreater than said limit speed omega_bdIn case of (2), performing the feedback according to theSpeed of rotation omega_fl、k₁、k₂Calculating the upper limit power P₁(ω_fl) And the lower limit power P₂(ω_fl) And (5) carrying out the following steps.

4. The method for detecting a pump body according to claim 3, further comprising, after the step S304:

s410, based on the feedback rotating speed omega_flLess than or equal to the limit rotation speed omega_bdIn the case of (3), a constant k is selected₀Selecting a constant delta P, wherein the delta P is selected according to the margin required by the operation of the pump body;

s412, according to the feedback rotating speed omega_fl、k₀Calculating the upper limit power P₁(ω_fl) And the lower limit power P₂(ω_fl) Wherein the upper limit power P₁(ω_fl) The calculation formula of (2) is as follows:

P₁(ω_fl)＝k₀×ω_fl ³+ΔP，

the lower limit power P₂(ω_fl) The calculation formula of (2) is as follows:

P₂(ω_fl)＝max(k₀×ω_fl ³－ΔP，0)；

k₁and k₂Are respectively connected with k₀The relationship of (1) is: k is a radical of₁>k₀，k₂<k₀。

5. The method of inspecting a pump body according to claim 4,

the selection constant k₀Comprises the following steps: operating the pump body to a rated working condition, and recording the rated power P under the rated working condition_mo(ω_rate) Numerical value, obtaining rated rotation speed omega of the pump body_rate；

The P is added_mo(ω_rate) And omega_rateSubstituted into k₀＝P_mo(ω_rate)/ω_rate ³Is calculated to obtaink₀The value of (a).

6. The method for detecting a pump body according to any one of claims 1 to 5, wherein the S104 includes:

s504, acquiring voltage U of α shaft of the motor_αAnd current I_αObtaining the voltage U of β shaft of the motor_βAnd current I_β；

S506, converting the voltage U of α shaft of the motor_αAnd current I_αVoltage U of β shaft of the motor_βAnd current I_βAre all substituted into the output power P_mo＝(3/2)×(U_αI_α+U_βI_β) Calculating to obtain the output power P_moThe value of (a).

7. The method for detecting a pump body according to any one of claims 1 to 4, wherein the S108 includes:

s608, based on P₁(ω_fl)≥P_mo≥P₂(ω_fl) If not, the output power P is judged_moWhether the duration time outside the interval is greater than a preset judgment time T or not;

s610, based on P₁(ω_fl)≥P_mo≥P₂(ω_fl) And under the condition that the duration of the failure is longer than the preset determination duration T, determining that the pump body is in an idle running state.

8. The method of inspecting a pump body according to any one of claims 1 to 4,

obtaining a feedback rotation speed omega of the pump body in the S102_flAfter the step (2), further comprising: for the feedback rotation speed omega_flCarrying out filtering treatment; and/or

Obtaining the output power P of a motor connected with the pump body_moAfter the step (2), further comprising: for the output power P_moAnd (6) carrying out filtering processing.

9. A system for detecting a pump body, comprising:

a calculation unit for obtaining the feedback rotation speed omega of the pump body_flAccording to said feedback rotation speed omega_flCalculating the upper limit power P of the pump body₁(ω_fl) And a lower limit power P of the pump body₂(ω_fl)；

An acquisition unit for acquiring output power P of a motor connected with the pump body_mo；

A judging unit for judging the output power P_moWhether it is at the upper limit power P₁(ω_fl) And the lower limit power P₂(ω_fl) Within the formed interval.

10. A pump body, characterized in that it comprises:

a memory configured to store executable instructions;

a processor configured to execute stored instructions to implement the steps of the method of detecting a pump body according to any one of claims 1 to 8.

11. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of detecting a pump body according to any one of claims 1 to 8.

Technical Field

Embodiments of the present invention relate to the field of pump bodies, and more particularly, to a pump body detection method, a pump body detection system, a pump body, and a computer-readable storage medium.

Background

When the automobile electronic water pump is used, a pipeline leakage may occur to cause the water pump to be in an idle running (namely, dry running, which means that the water pump runs under the condition of not discharging and conveying media), and if the automobile electronic water pump runs for a long time, the automobile electronic water pump can cause damage to the water pump, so that whether the water pump is in the dry running state or not needs to be detected in time.

Disclosure of Invention

Embodiments of the present invention are directed to solving at least one of the technical problems occurring in the prior art.

An aspect of an embodiment of the present invention provides a pump body detection method.

One aspect of an embodiment of the present invention provides a pump body inspection system.

One aspect of an embodiment of the present invention provides a pump body.

An aspect of an embodiment of the present invention provides a computer-readable storage medium.

In view of the above, an embodiment of the present invention provides a pump body detection method, including: obtaining the feedback rotation speed omega of the pump body_flAccording to the feedback rotation speed omega_flCalculating the upper limit power P of the pump body₁(ω_fl) And lower limit power P of pump body₂(ω_fl) (ii) a Obtaining the output power P of the motor in the pump body_mo(ii) a Judgment of P₁(ω_fl)≥P_mo≥P₂(ω_fl) Whether the result is true or not; based on P₁(ω_fl)≥P_mo≥P₂(ω_fl) If the state is not satisfied, it is determined that the pump is in an idling state.

According to the detection method of the pump body provided by the embodiment of the invention, firstly, after the pump body operates, the feedback rotating speed omega of the current pump body is obtained_flFeedback of rotational speed omega_flObtained for real-time measurement, according to feedback speed omega_flCalculating the upper limit power P of the pump body₁(ω_fl) And lower limit power P of pump body₂(ω_fl) (ii) a Upper limit power P₁(ω_fl) Reflecting the current feedbackSpeed omega_flThe upper limit power in normal operation is the current maximum power and the lower limit power P₂(ω_fl) Respectively reflected in the current feedback rotation speed omega_flThe lower limit power of the lower normal operation is the current minimum power; then obtaining the output power P of the motor connected with the pump body_moOutput power P_moReflecting the current power of the motor; judgment of P₁(ω_fl)≥P_mo≥P₂(ω_fl) Whether or not this is true, that is, the output power P is determined_moWhether it is at the upper limit power P₁(ω_fl) And lower limit power P₂(ω_fl) Within the formed interval, when the judgment result is the output power P_moNot at the upper limit power P₁(ω_fl) And lower limit power P₂(ω_fl) Within the interval formed, i.e. P_mo＜P₂(ω_fl) Or P₁(ω_fl)＜P_moIf so, determining that the current pump body is in an idle state. The invention feeds back the rotating speed omega_flAnd the output power P of the motor_moThe acquisition can directly detect whether the pump body idles or not, so that when the motor idles, the motor can stop running in time, and the damage to the pump body caused by the idling is avoided.

Specifically, the idle state is a state in which the pump body does not dry out water, and the cause of this is generally caused when liquid is not discharged at all or when air bubbles adhere to the normally wet rotating member during normal discharge. When the idle state occurs, because no liquid is discharged, the material is heated, abraded, corroded, vibrated or other phenomena caused by lack of cooling and centripetal force in some places, and even the pump body is completely damaged.

In addition, the method for detecting the pump body provided by the technical scheme of the invention also has the following additional technical characteristics:

in any of the above technical solutions, preferably, the feedback rotation speed ω of the pump body is obtained_flAccording to the feedback rotation speed omega_flCalculating the upper limit power P of the pump body₁(ω_fl) And lower limit power of pump bodyP₂(ω_fl) The method comprises the following steps: obtaining a feedback rotation speed omega_flChoosing a constant k₁And k₂Wherein k is₁And k₂Selecting according to the margin required by the operation of the pump body; according to feedback speed omega_fl、k₁、k₂Calculating the upper limit power P₁(ω_fl) And lower limit power P₂(ω_fl) Wherein the upper limit power P₁(ω_fl) The calculation formula of (2) is as follows: p₁(ω_fl)＝k₁×ω_fl ³Lower limit power P₂(ω_fl) The calculation formula of (2) is as follows: p₂(ω_fl)＝k₂×ω_fl ³。

In the technical scheme, the method for acquiring the upper limit power P is provided₁(ω_fl) And lower limit power P₂(ω_fl) The specific scheme of (1). Firstly, obtaining the feedback rotating speed omega of the pump body_flThen, a constant k is selected according to the margin required by the operation of the pump body₁And k₂And make k₁And k₂Satisfies the relationship of (1)₁＞k₂Then according to the feedback speed omega_fl、k₁And k₂Calculating the upper limit power P according to the formula₁(ω_fl) And lower limit power P₂(ω_fl) Upper limit power P₁(ω_fl) The calculation formula of (2) is as follows: p₁(ω_fl)＝k₁×ω_fl ³Lower limit power P₂(ω_fl) The calculation formula of (2) is as follows: p₂(ω_fl)＝k₂×ω_fl ³Therefore, the upper limit power P can be calculated by the above formula₁(ω_fl) And lower limit power P₂(ω_fl) To subsequently limit the power P₁(ω_fl) And lower limit power P₂(ω_fl) As a defined output power P_moWhether it is a criterion of idling or not.

In particular, constant k₁And k₂The selection is based on the margin required for the operation of the pump body, i.e. when the pump body is operating, the required precision is high and the margin is largeAt a lower degree, k₁And k₂The difference between the two will be small, i.e. the upper limit power P₁(ω_fl) And lower limit power P₂(ω_fl) The formed area is small; otherwise, when the operation precision is low and the margin is high, k₁And k₂The difference between the two will be larger, i.e. the upper limit power P₁(ω_fl) And lower limit power P₂(ω_fl) The formed area is large, and the output power P between the two is satisfied_moThere will be more.

In any of the above solutions, preferably, the feedback rotation speed ω is obtained_flSelect a predetermined k₁And k₂After the step (2), further comprising: judging feedback rotation speed omega_flWhether or not it is greater than the preset limit rotation speed omega_bd(ii) a Based on feedback speed omega_flGreater than a limit speed omega_bdAccording to the feedback rotation speed omega_fl、k₁、k₂Calculating the upper limit power P₁(ω_fl) And lower limit power P₂(ω_fl) And (5) carrying out the following steps.

In the technical scheme, the method for acquiring the upper limit power P is provided₁(ω_fl) And lower limit power P₂(ω_fl) The specific scheme of (1). Obtaining a preset limit rotating speed omega_bd(ii) a At the calculation of the upper limit power P₁(ω_fl) And lower limit power P₂(ω_fl) When the formula P provided in the above embodiment is adopted₁(ω_fl)＝k₁×ω_fl ³And P₂(ω_fl)＝k₂×ω_fl ³When calculating, the rotating speed omega is fed back due to the formula_flApproaching 0, P₁(ω_fl) And P₂(ω_fl) Is uniformly close to 0, thus leading to the feedback rotation speed omega_flWhen the upper limit power P is less than a certain value, the formula is adopted to limit the upper limit power P₁(ω_fl) And lower limit power P₂(ω_fl) The difference is small, and the normal detection requirement cannot be met, so that the feedback rotation speed omega can be firstly judged_flWhether it is greater than the preset limitSpeed omega_bd(ii) a Based on feedback speed omega_flGreater than a limit speed omega_bdFor the upper limit power P₁(ω_fl) And lower limit power P₂(ω_fl) Will be calculated according to the formula P₁(ω_fl)＝k₁×ω_fl ³And P₂(ω_fl)＝k₂×ω_fl ³And the reasonability of the detection result is ensured by calculating.

In any of the above technical solutions, preferably, the feedback rotation speed ω is judged_flWhether or not it is greater than the preset limit rotation speed omega_bdAfter the step (2), further comprising: based on feedback speed omega_flLess than or equal to limit rotation speed omega_bdIn the case of (3), a constant k is selected₀Selecting a constant delta P, wherein the delta P is selected according to the margin required by the operation of the pump body; according to feedback speed omega_fl、k₀Δ P calculating the upper limit power P₁(ω_fl) And lower limit power P₂(ω_fl) Wherein the upper limit power P₁(ω_fl) The calculation formula of (2) is as follows: p₁(ω_fl)＝k₀×ω_fl ³+ Δ P, lower limit power P₂(ω_fl) The calculation formula of (2) is as follows: p₂(ω_fl)＝max(k₀×ω_fl ³－ΔP，0)；k₁And k₂Are respectively connected with k₀The relationship of (1) is: k is a radical of₁>k₀，k₂<k₀。

In the technical scheme, the method for acquiring the upper limit power P is provided₁(ω_fl) And lower limit power P₂(ω_fl) The specific scheme of (1). At feedback speed omega_flLess than or equal to limit rotation speed omega_bdThen, other acquisition upper limit power P is adopted₁(ω_fl) And lower limit power P₂(ω_fl) In particular, a constant k is chosen₀Selecting constant delta P and upper limit power P₁(ω_fl) The calculation formula of (2) is as follows: p₁(ω_fl)＝k₀×ω_fl ³+ Δ P, lower limit power P₂(ω_fl) The calculation formula of (2) is as follows:P₂(ω_fl)＝max(k₀×ω_fl ³- Δ P, 0), by setting a constant Δ P such that at the feedback speed ω_flIs less than the limit rotation speed omega_bdThe calculated upper limit power P can be ensured₁(ω_fl) And lower limit power P₂(ω_fl) Still have comparatively obvious difference, guaranteed that the testing result can accord with operating condition more.

Conceivably, the Δ P is selected according to the margin required by the operation of the pump body, and when the value of the Δ P is larger, the corresponding margin required by the operation of the pump body is also larger.

In any of the above solutions, preferably, the constant k is selected₀Comprises the following steps: operating the pump body to a rated working condition, and recording the rated power P under the rated working condition_mo(ω_rate) Numerical value, obtaining rated rotation speed omega of pump body_rate(ii) a Will P_mo(ω_rate) And omega_rateSubstituted into k₀＝P_mo(ω_rate)/ω_rate ³K is obtained by calculation₀The value of (a).

In the technical scheme, a calculation constant k is provided₀The specific scheme of (1). Firstly, the pump body is operated to a rated working condition, and then, the rated power P under the rated working condition is obtained and recorded_mo(ω_rate) Numerical value, and simultaneously obtaining the rated rotation speed omega of the pump body_rateConstant k₀By the formula k₀＝P_mo(ω_rate)/ω_rate ³And calculate to obtain k₀At rated power P_mo(ω_rate) And rated rotation speed omega_rateThe obtained constant is calculated in time so as to calculate the upper limit power P subsequently₁(ω_fl) And lower limit power P₂(ω_fl)。

In any of the above technical solutions, preferably, the output power P of the motor in the pump body is obtained_moComprises the steps of obtaining the voltage U of α shaft of the motor_αAnd current I_αObtaining the voltage U of β shaft of the motor_βAnd current I_β(ii) a Of an electric machineα Axis Voltage U_αAnd current I_αβ shaft voltage U of motor_βAnd current I_βAre all substituted into the output power P_mo＝(3/2)×(U_αI_α+U_βI_β) Calculating to obtain the output power P_moThe value of (a).

In the technical scheme, P for calculating the output power of the motor is provided_moFirstly, the voltage U of α shaft of the motor is obtained_αAnd current I_αβ Axis Voltage U_βAnd current I_βThen according to voltage U of α axis_αAnd current I_αβ shaft voltage U of motor_βAnd current I_βCalculating the output power P_moValue of (1), output power P_moIs calculated as the output power P_mo＝(3/2)×(U_αI_α+U_βI_β) According to the invention, the output power of the motor can be calculated according to the voltage and the current respectively obtained from the α shaft and the β shaft of the motor, other detection components are not needed to detect the power of the motor, and the detection cost is reduced.

In any of the above solutions, preferably, based on P₁(ω_fl)≥P_mo≥P₂(ω_fl) If the state is not satisfied, the step of determining that the pump body is in an idling state includes: based on P₁(ω_fl)≥P_mo≥P₂(ω_fl) If not, the output power P is judged_moWhether the duration time outside the interval is greater than a preset judgment time T or not; based on P₁(ω_fl)≥P_mo≥P₂(ω_fl) And under the condition that the duration of the failure is longer than the preset determination duration T, determining that the pump body is in an idle running state.

In this technical scheme, a scheme that whether accurate judgement pump body is idle running is provided. When the output power P_moIf the output power P is not within the section, the pump may be in an idling state or may be caused by unstable operation of the pump, and therefore, it is necessary to determine the output power P to eliminate erroneous determination caused by unstable operation_moLocated in the intervalWhether the external duration is greater than the preset judgment duration T or not when the output power P is_moWhen the duration time which is not in the interval is longer than the preset judgment time T, the pump body can be judged to be in an idle state, and the accuracy of the judgment result is ensured.

In any of the above technical solutions, preferably, the feedback rotation speed ω of the pump body is obtained_flAfter the step (2), further comprising: for feedback rotation speed omega_flAnd (6) carrying out filtering processing.

In the technical scheme, the feedback rotating speed omega of the pump body is obtained_flThen, the feedback rotation speed omega is adjusted_flAnd filtering is carried out, so that the influence on the detection result caused by large jitter of the directly acquired parameters is avoided.

In any of the above solutions, preferably, the output power P of the motor connected to the pump body is obtained_moAfter the step (2), further comprising: to the output power P_moAnd (6) carrying out filtering processing.

In the technical scheme, the output power P of the motor is obtained_moThen, the output power P is adjusted_moAnd filtering is carried out, so that the influence on the detection result caused by large jitter of the directly acquired parameters is avoided.

According to a second aspect of the present invention, there is provided a pump body inspection system comprising: a calculation unit for obtaining the feedback rotation speed omega of the pump body_flAccording to the feedback rotation speed omega_flCalculating the upper limit power P of the pump body₁(ω_fl) And lower limit power P of pump body₂(ω_fl) (ii) a An acquisition unit for acquiring the output power P of the motor in the pump body_mo(ii) a A judging unit for judging P₁(ω_fl)≥P_mo≥P₂(ω_fl) Whether the result is true or not; processing unit based on P₁(ω_fl)≥P_mo≥P₂(ω_fl) If the state is not satisfied, the state is used to determine that the pump body is in an idling state.

The detection system for the pump body comprises a calculation unit, an acquisition unit, a judgment unit and a processing unit, wherein after the pump body runs, the calculation unit acquires the current stateFeedback speed omega of pump body_flFeedback of rotational speed omega_flObtained for real-time measurement, according to feedback speed omega_flCalculating the upper limit power P of the pump body₁(ω_fl) And lower limit power P of pump body₂(ω_fl) (ii) a Upper limit power P₁(ω_fl) Reflected in the current feedback speed omega_flThe upper limit power in normal operation is the current maximum power and the lower limit power P₂(ω_fl) Respectively reflected in the current feedback rotation speed omega_flThe lower limit power of the lower normal operation is the current minimum power; then obtaining the output power P of the motor connected with the pump body_moOutput power P_moReflecting the current power of the motor; judgment of P₁(ω_fl)≥P_mo≥P₂(ω_fl) Whether or not this is true, that is, the output power P is determined_moWhether it is at the upper limit power P₁(ω_fl) And lower limit power P₂(ω_fl) Within the formed interval, when the judgment result is the output power P_moNot at the upper limit power P₁(ω_fl) And lower limit power P₂(ω_fl) Within the interval formed, i.e. P_mo＜P₂(ω_fl) Or P₁(ω_fl)＜P_moIf so, determining that the current pump body is in an idle state. The invention feeds back the rotating speed omega_flAnd the output power P of the motor_moThe acquisition can directly detect whether the pump body idles or not, so that when the motor idles, the motor can stop running in time, and the damage to the pump body caused by the idling is avoided.

Specifically, the idle state is a state in which the pump body does not dry out water, and the cause of this is generally caused when liquid is not discharged at all or when air bubbles adhere to the normally wet rotating member during normal discharge. When the idle state occurs, because no liquid is discharged, the material is heated, abraded, corroded, vibrated or other phenomena caused by lack of cooling and centripetal force in some places, and even the pump body is completely damaged.

According to a third aspect of the present invention there is provided a pump body comprising: a memory configured to store executable instructions; the processor is configured to execute the stored instructions to implement the steps of the pump body detection method provided in any one of the above embodiments, so that the method has all technical effects of the pump body detection method, and details are not described herein.

According to a fourth aspect of the invention, there is provided a computer-readable storage medium on which a computer program is stored, which computer program, when executed by a processor, carries out the steps of the method of detecting a pump body as provided in any one of the above. Therefore, the method has all the technical effects of the pump body detection method, and is not described herein again.

Additional aspects and advantages in accordance with the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic flow chart of a method of inspecting a pump body according to an embodiment of the present invention;

FIG. 2 illustrates a further schematic flow chart of a method of detecting a pump body provided by one embodiment of the present invention;

FIG. 3 illustrates a further schematic flow chart of a method of detecting a pump body provided by one embodiment of the present invention;

FIG. 4 illustrates a further schematic flow chart of a method of detecting a pump body provided by one embodiment of the present invention;

FIG. 5 is a further schematic flow chart diagram illustrating a method of detecting a pump body according to one embodiment of the present invention;

FIG. 6 is a schematic flow chart illustrating a method of inspecting a pump body according to an embodiment of the present invention;

FIG. 7 illustrates a block diagram of a pump body inspection system according to one embodiment of the present invention;

FIG. 8 is a schematic diagram illustrating the structure of a pump body provided by one embodiment of the present invention;

FIG. 9 illustrates a graph of pump body speed versus power during operation, according to an embodiment of the present invention;

FIG. 10 illustrates a block diagram of various interface connections in a pump body detection system provided by one embodiment of the present invention.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as specifically described herein, and thus the scope of the present invention is not limited by the specific embodiments disclosed below.

A pump body detection method, a pump body detection system, a pump body, and a computer-readable storage medium according to embodiments of the present invention are described below with reference to fig. 1 to 10.

Fig. 1 shows a schematic flow diagram of a method for detecting a pump body according to an embodiment of the invention.

As shown in fig. 1, a pump body detection method according to an embodiment of the present invention includes:

s102, obtaining a feedback rotating speed omega of the pump body_flAccording to the feedback rotation speed omega_flCalculating the upper limit power P of the pump body₁(ω_fl) And lower limit power P of pump body₂(ω_fl)；

S104, acquiring the output power P of the motor in the pump body_mo；

S106, judging P₁(ω_fl)≥P_mo≥P₂(ω_fl) Whether the result is true or not;

s108, based on P₁(ω_fl)≥P_mo≥P₂(ω_fl) If the state is not satisfied, it is determined that the pump body is in an idling state。

According to the detection method of the pump body provided by the embodiment of the invention, firstly, after the pump body operates, the feedback rotating speed omega of the current pump body is obtained_flFeedback of rotational speed omega_flObtained for real-time measurement, according to feedback speed omega_flCalculating the upper limit power P of the pump body₁(ω_fl) And lower limit power P of pump body₂(ω_fl) (ii) a Upper limit power P₁(ω_fl) Reflected in the current feedback speed omega_flThe upper limit power in normal operation is the current maximum power and the lower limit power P₂(ω_fl) Respectively reflected in the current feedback rotation speed omega_flThe lower limit power of the lower normal operation is the current minimum power; then obtaining the output power P of the motor connected with the pump body_moOutput power P_moReflecting the current power of the motor; judgment of P₁(ω_fl)≥P_mo≥P₂(ω_fl) Whether or not this is true, that is, the output power P is determined_moWhether it is at the upper limit power P₁(ω_fl) And lower limit power P₂(ω_fl) Within the formed interval, when the judgment result is the output power P_moNot at the upper limit power P₁(ω_fl) And lower limit power P₂(ω_fl) Within the interval formed, i.e. P_mo＜P₂(ω_fl) Or P₁(ω_fl)＜P_moIf so, determining that the current pump body is in an idle state. The invention feeds back the rotating speed omega_flAnd the output power P of the motor_moThe acquisition can directly detect whether the pump body idles or not, so that when the motor idles, the motor can stop running in time, and the damage to the pump body caused by the idling is avoided.

Specifically, the idle state is a state in which the pump body does not spin dry, which may also be referred to as a dry-running state, and is caused generally when liquid is not discharged at all or when air bubbles adhere to the normally wet rotating member during normal discharge. When the idle state occurs, because no liquid is discharged, the material is heated, abraded, corroded, vibrated or other phenomena caused by lack of cooling and centripetal force in some places, and even the pump body is completely damaged.

Conceivably, the feedback rotating speed omega is obtained by adopting a non-speed sensor or an angle sensor in the invention_fl。

Fig. 2 shows a schematic flow diagram of a method for detecting a pump body according to an embodiment of the invention.

As shown in fig. 2, a pump body detection method according to an embodiment of the present invention includes:

s202, obtaining the feedback rotating speed omega of the pump body_flChoosing a constant k₁And k₂Wherein k is₁And k₂Selecting according to the margin required by the operation of the pump body;

s204, according to the feedback rotating speed omega_fl、k₁、k₂Calculating the upper limit power P₁(ω_fl) And lower limit power P₂(ω_fl) Wherein the upper limit power P₁(ω_fl) The calculation formula of (2) is as follows: p₁(ω_fl)＝k₁×ω_fl ³Lower limit power P₂(ω_fl) The calculation formula of (2) is as follows: p₂(ω_fl)＝k₂×ω_fl ³；

S206, acquiring the output power P of the motor in the pump body_mo；

S208, judging P₁(ω_fl)≥P_mo≥P₂(ω_fl) Whether the result is true or not;

s210, based on P₁(ω_fl)≥P_mo≥P₂(ω_fl) If the state is not satisfied, it is determined that the pump is in an idling state.

In the technical scheme, the method for acquiring the upper limit power P is provided₁(ω_fl) And lower limit power P₂(ω_fl) The specific scheme of (1). Firstly, obtaining the feedback rotating speed omega of the pump body_flThen, a constant k is selected according to the margin required by the operation of the pump body₁And k₂And make k₁And k₂Satisfies the relationship of (1)₁＞k₂Then according to the feedback speed omega_fl、k₁And k₂Calculating the upper limit power P according to the formula₁(ω_fl) And lower limit power P₂(ω_fl) Upper limit power P₁(ω_fl) The calculation formula of (2) is as follows: p₁(ω_fl)＝k₁×ω_fl ³Lower limit power P₂(ω_fl) The calculation formula of (2) is as follows: p₂(ω_fl)＝k₂×ω_fl ³Therefore, the upper limit power P can be calculated by the above formula₁(ω_fl) And lower limit power P₂(ω_fl) To subsequently limit the power P₁(ω_fl) And lower limit power P₂(ω_fl) As a defined output power P_moWhether it is a criterion of idling or not.

In particular, constant k₁And k₂The selection is carried out according to the margin required by the operation of the pump body, namely, when the precision required by the operation of the pump body is high and the margin is low, k is₁And k₂The difference between the two will be small, i.e. the upper limit power P₁(ω_fl) And lower limit power P₂(ω_fl) The formed area is small; otherwise, when the operation precision is low and the margin is high, k₁And k₂The difference between the two will be larger, i.e. the upper limit power P₁(ω_fl) And lower limit power P₂(ω_fl) The formed area is large, and the output power P between the two is satisfied_moThere will be more.

Fig. 3 shows a schematic flow diagram of a method for detecting a pump body according to an embodiment of the invention.

As shown in fig. 3, a pump body detection method according to an embodiment of the present invention includes:

s302, obtaining a feedback rotating speed omega of the pump body_fl；

S304, judging the feedback rotating speed omega_flWhether or not it is greater than the preset limit rotation speed omega_bd；

S306, based on the feedback rotating speed omega_flGreater than a limit speed omega_bdIn the case of (3), a constant k is selected₁And k₂Wherein k is₁And k₂Selecting according to the margin required by the operation of the pump body;

s308, according to the feedback rotating speed omega_fl、k₁、k₂Calculating the upper limit power P₁(ω_fl) And lower limit power P₂(ω_fl) Wherein the upper limit power P₁(ω_fl) The calculation formula of (2) is as follows: p₁(ω_fl)＝k₁×ω_fl ³Lower limit power P₂(ω_fl) The calculation formula of (2) is as follows: p₂(ω_fl)＝k₂×ω_fl ³；

S310, obtaining the output power P of the motor in the pump body_mo；

S312, judging P₁(ω_fl)≥P_mo≥P₂(ω_fl) Whether the result is true or not;

s314, based on P₁(ω_fl)≥P_mo≥P₂(ω_fl) If the state is not satisfied, it is determined that the pump is in an idling state.

In the technical scheme, the method for acquiring the upper limit power P is provided₁(ω_fl) And lower limit power P₂(ω_fl) The specific scheme of (1). Obtaining a preset limit rotating speed omega_bd(ii) a At the calculation of the upper limit power P₁(ω_fl) And lower limit power P₂(ω_fl) When the formula P provided in the above embodiment is adopted₁(ω_fl)＝k₁×ω_fl ³And P₂(ω_fl)＝k₂×ω_fl ³When calculating, the rotating speed omega is fed back due to the formula_flApproaching 0, P₁(ω_fl) And P₂(ω_fl) Is uniformly close to 0, thus leading to the feedback rotation speed omega_flWhen the upper limit power P is less than a certain value, the formula is adopted to limit the upper limit power P₁(ω_fl) And lower limit power P₂(ω_fl) The difference is small, and the normal detection requirement cannot be met, so that the feedback rotation speed omega can be firstly judged_flWhether or not it is greater than the preset limit rotation speed omega_bd(ii) a Based on feedback speed omega_flGreater than a limit speed omega_bdFor the upper limit power P₁(ω_fl) And lower limit power P₂(ω_fl) Will be calculated according to the formula P₁(ω_fl)＝k₁×ω_fl ³And P₂(ω_fl)＝k₂×ω_fl ³And the reasonability of the detection result is ensured by calculating.

Fig. 4 shows a schematic flow diagram of a method for detecting a pump body according to an embodiment of the invention.

As shown in fig. 4, a pump body detection method according to an embodiment of the present invention includes:

s402, obtaining the feedback rotating speed omega of the pump body_fl；

S404, judging the feedback rotating speed omega_flWhether or not it is greater than the preset limit rotation speed omega_bd；

S406, based on the feedback rotation speed omega_flGreater than a limit speed omega_bdIn the case of (3), a constant k is selected₁And k₂Wherein k is₁And k₂Selecting according to the margin required by the operation of the pump body;

s408, according to the feedback rotating speed omega_fl、k₁、k₂Calculating the upper limit power P₁(ω_fl) And lower limit power P₂(ω_fl) Wherein the upper limit power P₁(ω_fl) The calculation formula of (2) is as follows: p₁(ω_fl)＝k₁×ω_fl ³Lower limit power P₂(ω_fl) The calculation formula of (2) is as follows: p₂(ω_fl)＝k₂×ω_fl ³；

S410, based on the feedback rotating speed omega_flLess than or equal to limit rotation speed omega_bdIn the case of (3), a constant k is selected₀Selecting a constant delta P, wherein the delta P is selected according to the margin required by the operation of the pump body;

s412, according to the feedback rotation speed omega_fl、k₀Δ P calculating the upper limit power P₁(ω_fl) And lower limit power P₂(ω_fl) Wherein the upper limit power P₁(ω_fl) The calculation formula of (2) is as follows: p₁(ω_fl)＝k₀×ω_fl ³+ Δ P, lower limit power P₂(ω_fl) The calculation formula of (2) is as follows: p₂(ω_fl)＝max(k₀×ω_fl ³－ΔP，0)；

S414, obtaining the output power P of the motor in the pump body_mo；

S416, judging P₁(ω_fl)≥P_mo≥P₂(ω_fl) Whether the result is true or not;

s418, based on P₁(ω_fl)≥P_mo≥P₂(ω_fl) If the pump body is not in the idle state, judging that the pump body is in the idle state;

wherein k is₁And k₂Are respectively connected with k₀The relationship of (1) is: k is a radical of₁>k₀，k₂<k₀。

In the technical scheme, the method for acquiring the upper limit power P is provided₁(ω_fl) And lower limit power P₂(ω_fl) The specific scheme of (1). At feedback speed omega_flLess than or equal to limit rotation speed omega_bdThen, other acquisition upper limit power P is adopted₁(ω_fl) And lower limit power P₂(ω_fl) In particular, a constant k is chosen₀Selecting constant delta P and upper limit power P₁(ω_fl) The calculation formula of (2) is as follows: p₁(ω_fl)＝k₀×ω_fl ³+ Δ P, lower limit power P₂(ω_fl) The calculation formula of (2) is as follows: p₂(ω_fl)＝max(k₀×ω_fl ³- Δ P, 0), by setting a constant Δ P such that at the feedback speed ω_flIs less than the limit rotation speed omega_bdThe calculated upper limit power P can be ensured₁(ω_fl) And lower limit power P₂(ω_fl) Still have comparatively obvious difference, guaranteed that the testing result can accord with operating condition more.

Conceivably, the Δ P is selected according to the margin required by the operation of the pump body, and when the value of the Δ P is larger, the corresponding margin required by the operation of the pump body is also larger.

In any of the above solutions, preferably, the constant k is selected₀Comprises the following steps: operating the pump body to a rated working condition, and recording the rated power P under the rated working condition_mo(ω_rate) Numerical value, obtaining rated rotation speed omega of pump body_rate(ii) a Will P_mo(ω_rate) And omega_rateSubstituted into k₀＝P_mo(ω_rate)/ω_rate ³K is obtained by calculation₀The value of (a).

In the technical scheme, a calculation constant k is provided₀The specific scheme of (1). Firstly, the pump body is operated to a rated working condition, and then, the rated power P under the rated working condition is obtained and recorded_mo(ω_rate) Numerical value, and simultaneously obtaining the rated rotation speed omega of the pump body_rateConstant k₀By the formula k₀＝P_mo(ω_rate)/ω_rate ³And calculate to obtain k₀At rated power P_mo(ω_rate) And rated rotation speed omega_rateThe obtained constant is calculated in time so as to calculate the upper limit power P subsequently₁(ω_fl) And lower limit power P₂(ω_fl)。

Fig. 5 shows a schematic flow diagram of a method for detecting a pump body according to an embodiment of the invention.

As shown in fig. 5, a pump body detection method according to an embodiment of the present invention includes:

s502, obtaining the feedback rotating speed omega of the pump body_flAccording to the feedback rotation speed omega_flCalculating the upper limit power P of the pump body₁(ω_fl) And lower limit power P of pump body₂(ω_fl)；

S504, acquiring voltage U of α shaft of motor_αAnd current I_αObtaining the voltage U of β shaft of the motor_βAnd current I_β；

S506, converting the voltage U of α shaft of the motor_αAnd current I_αβ shaft voltage U of motor_βAnd current I_βAre all substituted into the output power P_mo＝(3/2)×(U_αI_α+U_βI_β) Calculating to obtain the output power P_moTaking the value of (A);

s508, judging P₁(ω_fl)≥P_mo≥P₂(ω_fl) Whether the result is true or not;

s510, based on P₁(ω_fl)≥P_mo≥P₂(ω_fl) If the state is not satisfied, it is determined that the pump is in an idling state.

In the technical scheme, P for calculating the output power of the motor is provided_moFirstly, the voltage U of α shaft of the motor is obtained_αAnd current I_αβ Axis Voltage U_βAnd current I_βThen according to voltage U of α axis_αAnd current I_αβ shaft voltage U of motor_βAnd current I_βCalculating the output power P_moValue of (1), output power P_moIs calculated as the output power P_mo＝(3/2)×(U_αI_α+U_βI_β) According to the invention, the output power of the motor can be calculated according to the voltage and the current respectively obtained from the α shaft and the β shaft of the motor, other detection components are not needed to detect the power of the motor, and the detection cost is reduced.

Fig. 6 shows a schematic flow diagram of a method for detecting a pump body according to an embodiment of the invention.

As shown in fig. 6, a pump body detection method according to an embodiment of the present invention includes:

s602, obtaining the feedback rotation speed omega of the pump body_flAccording to the feedback rotation speed omega_flCalculating the upper limit power P of the pump body₁(ω_fl) And lower limit power P of pump body₂(ω_fl)；

S604, obtaining the output power P of the motor in the pump body_mo；

S606, judging P₁(ω_fl)≥P_mo≥P₂(ω_fl) Whether the result is true or not;

s608, based on P₁(ω_fl)≥P_mo≥P₂(ω_fl) If not, the output power P is judged_moWhether the duration time outside the interval is greater than a preset judgment time T or not;

s610, based on P₁(ω_fl)≥P_mo≥P₂(ω_fl) And under the condition that the duration of the failure is longer than the preset determination duration T, determining that the pump body is in an idle running state.

In this technical scheme, a scheme that whether accurate judgement pump body is idle running is provided. When the output power P_moIf the output power P is not within the section, the pump may be in an idling state or may be caused by unstable operation of the pump, and therefore, it is necessary to determine the output power P to eliminate erroneous determination caused by unstable operation_moWhether the duration time outside the interval is greater than a preset judgment time length T or not when the output power P is_moWhen the duration time which is not in the interval is longer than the preset judgment time T, the pump body can be judged to be in an idle state, and the accuracy of the judgment result is ensured.

In any of the above technical solutions, preferably, the feedback rotation speed ω of the pump body is obtained_flAfter the step (2), further comprising: for feedback rotation speed omega_flAnd (6) carrying out filtering processing.

In the technical scheme, the feedback rotating speed omega of the pump body is obtained_flThen, the feedback rotation speed omega is adjusted_flAnd filtering is carried out, so that the influence on the detection result caused by large jitter of the directly acquired parameters is avoided.

In any of the above solutions, preferably, the output power P of the motor connected to the pump body is obtained_moAfter the step (2), further comprising: to the output power P_moAnd (6) carrying out filtering processing.

In the technical scheme, the output power P of the motor is obtained_moThen, the output power P is adjusted_moAnd filtering is carried out, so that the influence on the detection result caused by large jitter of the directly acquired parameters is avoided.

FIG. 9 is a graph showing the relationship between the rotational speed and the power whenOutput power P_moAt P₁(ω_fl) And P₂(ω_fl) When the semi-closed area of the enclosed city is in the enclosed area, determining that the semi-closed area is not in an idle state; and at the feedback rotation speed omega_flLess than limit speed omega_bdAt the time of (P)₁(ω_fl) And P₂(ω_fl) The region enclosed by the dotted line.

As shown in fig. 7, according to a second aspect of the invention, there is provided a pump body inspection system 700 comprising: a calculating unit 702 for obtaining the feedback rotation speed ω of the pump body_flAccording to the feedback rotation speed omega_flCalculating the upper limit power P of the pump body₁(ω_fl) And lower limit power P of pump body₂(ω_fl) (ii) a An obtaining unit 704 for obtaining the output power P of the motor in the pump body_mo(ii) a A judging unit 706 for judging P₁(ω_fl)≥P_mo≥P₂(ω_fl) Whether the result is true or not; a processing unit 708 based on P₁(ω_fl)≥P_mo≥P₂(ω_fl) If the state is not satisfied, the state is used to determine that the pump body is in an idling state.

The system 700 for detecting a pump body according to an embodiment of the present invention includes a calculating unit 702, an obtaining unit 704, a determining unit 706, and a processing unit 708, where after the pump body is operated, the calculating unit obtains a current feedback rotation speed ω of the pump body_flFeedback of rotational speed omega_flObtained for real-time measurement, according to feedback speed omega_flCalculating the upper limit power P of the pump body₁(ω_fl) And lower limit power P of pump body₂(ω_fl) (ii) a Upper limit power P₁(ω_fl) Reflected in the current feedback speed omega_flThe upper limit power in normal operation is the current maximum power and the lower limit power P₂(ω_fl) Respectively reflected in the current feedback rotation speed omega_flThe lower limit power of the lower normal operation is the current minimum power; then obtaining the output power P of the motor connected with the pump body_moOutput power P_moReflecting the current power of the motor; judgment of P₁(ω_fl)≥P_mo≥P₂(ω_fl) Whether or not this is true, that is, the output power P is determined_moWhether it is at the upper limit power P₁(ω_fl) And lower limit power P₂(ω_fl) Within the formed interval, when the judgment result is the output power P_moNot at the upper limit power P₁(ω_fl) And lower limit power P₂(ω_fl) Within the interval formed, i.e. P_mo＜P₂(ω_fl) Or P₁(ω_fl)＜P_moIf so, determining that the current pump body is in an idle state. The invention feeds back the rotating speed omega_flAnd the output power P of the motor_moThe acquisition can directly detect whether the pump body idles or not, so that when the motor idles, the motor can stop running in time, and the damage to the pump body caused by the idling is avoided.

Specifically, the idle state is a state in which the pump body does not dry out water, and the cause of this is generally caused when liquid is not discharged at all or when air bubbles adhere to the normally wet rotating member during normal discharge. When the idle state occurs, because no liquid is discharged, the material is heated, abraded, corroded, vibrated or other phenomena caused by lack of cooling and centripetal force in some places, and even the pump body is completely damaged.

As shown in fig. 10, a connection block diagram of each interface in the pump body detection system is shown, and includes the calculation directions of each parameter, and whether the pump body is in an idle state can be finally obtained by the pump body detection system.

As shown in fig. 8, according to a third aspect of the present invention there is provided a pump body 800 comprising: a memory 802 configured to store executable instructions; the processor 804 is configured to execute the stored instructions to implement the steps of the pump body detection method provided in any one of the above embodiments, so that the technical effects of the pump body detection method are all achieved, and details are not repeated herein.

According to a fourth aspect of the invention, there is provided a computer-readable storage medium on which a computer program is stored, which computer program, when executed by a processor, carries out the steps of the method of detecting a pump body as provided in any one of the above. Therefore, the method has all the technical effects of the pump body detection method, and is not described herein again.

In the description of the present specification, the terms "upper", "lower", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; the terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.