CN114966116A - Detection method and detection device of rotating speed transmitter - Google Patents
Detection method and detection device of rotating speed transmitter Download PDFInfo
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Abstract
The invention relates to the technical field of detection, in particular to a detection method and a detection device of a rotating speed transmission. The detection method comprises the following steps: under the condition that the rotating speed standard device operates at a reference value, acquiring an actual output value of the rotating speed transmitter; calculating to obtain an error value and a repeatability value according to the actual output value and the reference value; and judging whether the error value meets a first preset condition or not and whether the repeatability value meets a second preset condition or not, and if so, determining that the rotating speed transmitter meets the use requirement. The detection device is applied to the detection method. The detection method and the detection device can solve the problems of non-standardization and uncertainty in detection of the rotating speed transmitter.
Description
Technical Field
The invention relates to the technical field of detection, in particular to a detection method and a detection device of a rotating speed transmitter.
Background
The speed transducer is a new type of speed transducer, which can convert the angular displacement into electric pulse signal, and can output (4-20) mA current signal in linear corresponding relation with the speed, or only output current signal, and can be used as speed regulation feedback information, and can be used for speed display when matched with a meter head.
The most widely adopted in industry is to transmit analog quantity by (4-20) mA current, and the rotating speed transmitter is widely applied to industries of electric power, petrochemical industry, metallurgy, aviation and the like for monitoring rotating speed quantity values of rotating machinery due to the advantages of wide measuring range, stable output signal, capability of realizing remote transmission and the like.
At present, national regulations or specifications do not exist for metering the speed transmitter, detection can be carried out only by referring to technical specifications of a tachometer or a speed sensor, technical requirements of the speed transmitter are given without corresponding specifications, evaluation requirements of the speed transmitter cannot be met, and non-specifications and uncertainty are caused to model selection, detection and the like of the speed transmitter for the power plant.
Disclosure of Invention
The invention aims to provide a detection method of a rotating speed transmitter, which aims to solve the problems of non-standardization and uncertainty of detection of the rotating speed transmitter.
The detection method of the rotating speed transmitter provided by the invention is used for detecting the rotating speed transmitter arranged at the preset position of the rotating speed standard device, and comprises the following steps:
under the condition that the rotating speed standard device operates at a reference value, acquiring an actual output value of the rotating speed transmitter; the reference value corresponds to a detection point in a preset range of the rotating speed transmitter;
calculating to obtain an error value according to the actual output value and the reference value; or, calculating to obtain a repeatability value according to the actual output value;
and judging whether the error value meets a first preset condition and/or judging whether the repeatability value meets a second preset condition, and if so, determining that the rotating speed transmitter meets the use requirement.
Further, the calculating an error value according to the actual output value and the reference value includes:
calculating to obtain an actual output average value according to the actual output value of the preset detection point;
calculating to obtain an error value according to the difference value between the actual output average value of the preset detection points and the reference value; the error value is positively correlated with the actual output average value.
Further, the step of calculating an error value according to the actual output average value and the reference value of the preset detection point includes the steps of:
calculating to obtain a measurement error value according to a first current difference value between the current actual output average value of the preset detection point and a current reference value; the measurement error value is positively correlated with the first current difference value;
and/or calculating to obtain a rotating speed indicating value error value according to a rotating speed difference value between the actual output average value of the rotating speed of the preset detection point and the nominal value of the rotating speed; the rotating speed indication value error value is positively correlated with the rotating speed difference value.
Further, the calculation formula of the measurement error value is as follows:
wherein, delta I A measurement error value of a preset detection point is obtained;
Further, the calculation formula of the rotation speed indication error value is as follows:
δ n ＝-n 0 ；
wherein, delta n Indicating the error value of the rotating speed of the preset detection point, wherein n is the actual output average value of the rotating speed of the preset detection point, and n is 0 The rotation speed nominal value of the preset detection point is obtained.
Further, the calculating to obtain the repeatability value according to the actual output value includes the steps:
calculating to obtain an actual current output average value according to the actual current output value of the preset detection point;
and calculating to obtain a repeatability value according to a second current difference value between the current actual output value of the preset detection point and the current actual output average value.
Further, the calculation formula of the repeatability value is as follows:
wherein S is N Is the repeatability value;
Further, before the obtaining of the actual output value of the speed transmitter, the detection method further includes the steps of:
preheating the rotating speed standard device, and operating at a maximum rotating speed nominal value until a preset detection condition is met;
wherein the preset detection condition comprises: the rotating speed standard device runs for a preset time at the maximum rotating speed nominal value, or the digital multimeter of the rotating speed transmitter can normally display an output value.
Further, uniformly selecting a plurality of preset detection points in a preset range of the rotating speed transmitter, wherein the preset detection points comprise detection points corresponding to maximum nominal values in the preset range;
and/or the range of the clearance between the induction point of the rotating speed transmitter and the gear tooth top of the rotating speed standard device is as follows: 0.8 +/-0.05 mm.
The detection method of the rotating speed transmitter provided by the invention can produce the following beneficial effects:
according to the detection method of the rotating speed transmitter, the rotating speed transmitter is installed at the preset position of the rotating speed standard device and matched with the rotating speed standard device, the actual output value and the reference value are obtained in the measuring range of the rotating speed transmission by means of high accuracy of the rotating speed standard device, the error value and the repeatability value are obtained through calculation, the precision of the detection result of the rotating speed transmitter and the dispersity of the detection result are detected, the rotating speed transmitter meeting the preset conditions is selected, the use effectiveness of the rotating speed transmitter is ensured, and the safe and economic operation of a rotating machine is ensured. In the detection method, a corresponding error value and a corresponding repeatability value are calculated according to an actual output value and a reference value in a measuring range, and the whole detection and calculation process has normalization and determinacy, so that the detection method has normalization and determinacy.
A second object of the present invention is to provide a detection device for a rotation speed transmitter, which is applied to the above detection method, the detection device comprising:
the acquisition module is used for acquiring the actual output value of the rotating speed transmitter under the condition that the rotating speed standard device operates by a reference value; the reference value corresponds to a detection point in a preset range of the rotating speed transmitter;
the calculation module is used for calculating to obtain an error value according to the actual output value and the reference value; or, calculating to obtain a repeatability value according to the actual output value;
and the judging module is used for judging whether the error value meets a first preset condition and/or judging whether the repeatability value meets a second preset condition, and if so, determining that the rotating speed transmitter meets the use requirement.
The detection device of the rotating speed transmitter provided by the invention can produce the following beneficial effects:
the detection device of the rotating speed transmitter provided by the invention is applied to the detection method, has all the advantages of the detection method, and is not repeated herein.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic flow chart illustrating a method for detecting a rotating speed transmitter according to an embodiment of the present invention;
FIG. 2 is a system diagram related to a method for detecting a rotational speed transmitter according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a detection device of a rotational speed transmitter according to an embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The embodiment of the invention provides a detection method and a detection device of a rotating speed transmission, which are used for comprehensively and objectively evaluating the measurement accuracy and reliability of the rotating speed transmitter and ensuring the normal operation of the rotating speed transmitter in a corresponding use scene, and are specifically described as follows.
The detection method of the rotating speed transmitter provided by the embodiment of the invention is used for detecting the rotating speed transmitter arranged at the preset position of the rotating speed standard device, wherein the rotating speed standard device is a rotating speed generator and is used for providing a standard rotating speed signal, and the detection method comprises the following steps:
s200, acquiring an actual output value of the rotating speed transmitter under the condition that the rotating speed standard device runs by a reference value; the reference value corresponds to a detection point within a preset range of the speed transmitter.
Specifically, a plurality of preset detection points are uniformly selected in a preset range of the rotating speed transmitter, wherein the preset detection points comprise detection points corresponding to maximum reference values in the preset range; when the speed changer is installed in the speed standard device, a gap needs to be formed between the sensing point of the speed changer and the gear tooth crest of the speed standard device, the gap is about 0.8mm, for example, the gap range is as follows: 0.8 +/-0.05 mm.
In the step S200, before obtaining the actual output value of the rotation speed transmitter, the detection method further includes a step S100, that is, preheating the rotation speed standard device, and operating at the maximum rotation speed nominal value until the preset detection condition is met; wherein, the preset detection conditions comprise: the rotating speed standard device runs for a preset time at the maximum rotating speed nominal value, or the digital multimeter of the rotating speed transmitter can normally display an output value.
S300, calculating to obtain an error value according to the actual output value and the reference value; and/or calculating to obtain a repeatability value according to the actual output value.
It should be noted that, in this step, it can be understood that: calculating to obtain an error value according to the actual output value and the reference value; or, calculating to obtain a repeatability value according to the actual output value; or calculating to obtain an error value and a repeatability value according to the actual output value and the reference value. The error value includes a measurement error value corresponding to the current and a rotation speed indication error value corresponding to the rotation speed (see below).
S400, judging whether the error value meets a first preset condition and/or judging whether the repeatability value meets a second preset condition, and if so, determining that the rotating speed transmitter meets the use requirement.
It should be noted that, in this step, it can be understood that: judging whether the error value meets a first preset condition, and if so, determining that the rotating speed transmitter meets the use requirement; or judging whether the repeatability value meets a second preset condition, and if so, determining that the rotating speed transmitter meets the use requirement; or judging whether the error value meets a first preset condition or not, judging whether the repeatability value meets a second preset condition or not, and if so, determining that the rotating speed transmitter meets the use requirement.
Wherein, the first preset condition comprises: the first preset error value is less than or equal to the error value and less than or equal to the second preset error value, wherein the first preset error value is less than the second preset error value. When the error value is a measurement error related to the current, the first predetermined error value is a first predetermined current error value, and the second predetermined error value is a second predetermined current error value, which satisfies the following conditions: the first preset current error value is less than or equal to the measurement error value and less than or equal to the second preset current error value, wherein the first preset current error value is less than the second preset current error value. When the error value is a rotation speed indication value error value related to the rotation speed, the first preset error value is a first preset rotation speed error value, and the second preset error value is a second preset rotation speed error value, which satisfies the following conditions: the first preset rotating speed error value is less than or equal to the rotating speed indication value error value and less than or equal to the second preset rotating speed error value, wherein the first preset rotating speed error value is less than the second preset rotating speed error value.
According to the detection method of the rotating speed transmitter, the rotating speed transmitter is installed at the preset position of the rotating speed standard device and matched with the rotating speed standard device, the actual output value and the reference value are obtained in the measuring range of the rotating speed transmission by means of high accuracy of the rotating speed standard device, the error value and the repeatability value are obtained through calculation, the precision of the detection result of the rotating speed transmitter and the dispersity of the detection result are detected, the rotating speed transmitter meeting the preset conditions is selected, the use effectiveness of the rotating speed transmitter is ensured, and the safe and economic operation of a rotating machine is ensured. In the detection method, a corresponding error value and a corresponding repeatability value are calculated according to an actual output value and a reference value in a measuring range, and the whole detection and calculation process has normalization and determinacy, namely, the detection method has normalization and determinacy.
It should be noted that, when the rotation speed transmitter in this embodiment is used in other usage scenarios with low accuracy requirement, it only needs to satisfy at least one of the conditions, and when the rotation speed transmitter is used in a usage scenario with high accuracy requirement, it needs to satisfy both the first preset condition and the second preset condition, so as to ensure the normalization and the certainty of the detection method, and ensure the accuracy and the stability of the rotation speed transmitter in the corresponding usage scenario.
Specifically, in the step S300, calculating an error value according to the actual output value and the reference value, includes the following steps:
s310, calculating to obtain an actual output average value according to the actual output value of the preset detection point;
in step S310, the actual output values of the preset detection points include an actual current output value and an actual rotation speed output value, and accordingly, the actual output average value includes an actual current output average value and an actual rotation speed output average value. And a mode of uniformly selecting detection points in the measuring range of the rotating speed transmitter is adopted.
S312, calculating to obtain an error value according to the difference value between the actual output average value of the preset detection points and the reference value; wherein the error value is positively correlated with the actual output average value.
In step S312, corresponding to step S310, the reference values of the predetermined detection points include a current reference value and a nominal rotation speed value, and accordingly, the difference values include a current difference value related to the current and a rotation speed difference value related to the rotation speed, and the error values include a measurement error value related to the current and a rotation speed indication error value related to the rotation speed; specifically, when the error value is the measurement error value, the step S212 includes the following steps:
(a) calculating to obtain a measurement error value according to a first current difference value between the current actual output average value of the preset detection point and the current reference value; the measurement error value is positively correlated with the first current difference value.
Specifically, the calculation formula of the measurement error value is as follows:
wherein, delta I A measurement error value of a preset detection point is obtained;
I P -I O is a first current difference;
(b) Calculating to obtain a rotating speed indicating value error value according to a rotating speed difference value between the actual rotating speed output average value of the preset detection point and the rotating speed nominal value; the rotating speed indication value error value is positively correlated with the rotating speed difference value.
Specifically, the calculation formula of the rotation speed indicating value error value is as follows:
δ n ＝n-n 0 ；
wherein, delta n Indicating the error value of the rotation speed of the preset detection point, n is the actual output average value of the rotation speed of the preset detection point, n 0 The rotation speed nominal value of the preset detection point is obtained.
Specifically, in the step S300, the calculating to obtain the repeatability value according to the actual output value includes the following steps:
s320, calculating to obtain an actual current output average value according to the actual current output value of the preset detection point;
and S322, calculating to obtain a repeatability value according to a second current difference value between the current actual output value of the preset detection point and the current actual output average value.
Specifically, the formula for calculating the repeatability value is as follows:
wherein S is N Is a repeatability value;
I i -I P is the second current difference;
The detection method of the rotating speed transmitter provided by the embodiment of the invention is characterized in that the rotating speed transmitter is installed to a rotating speed standard device, the rotating speed standard device applies a high-accuracy standard rotating speed value to the rotating speed transmitter, the digital multimeter displays an output value (current actual output value) measured by the rotating speed transmitter at a corresponding measuring point, the output value is compared with a current reference value (theoretical output value) to obtain a measuring error value of the rotating speed transmitter, and the applicability of the rotating speed transmitter is judged through a repeatability value and a rotating speed indication value error value of the rotating speed transmitter. For the rotating speed transmitters applied to different use scenes, the key technical indexes of the rotating speed transmitters can be judged, the measurement accuracy and reliability of the rotating speed transmitters can be comprehensively and objectively evaluated, and the corresponding systems of the use scenes can be ensured to be normally put into operation.
Therefore, the rotating speed transmitter in the embodiment solves the problems that the rotating speed transmitter in a corresponding use scene has no detection standard, cannot be correspondingly evaluated and has technical index loss, ensures that the rotating speed transmitter meeting the requirement can be selected, and can accurately detect the running state and the motion change of shafting machinery when being applied to a corresponding use scene system, thereby ensuring the safe and economic running of a unit.
In order to further make the aforementioned objects, features and advantages of the embodiments of the present invention more comprehensible, a rotation speed transmitter used in a power plant is taken as an example and is described in detail with reference to a specific example.
For the rotating speed transmitter applied to the use scene of the power plant, the measurement accuracy and reliability of the rotating speed transmitter can be comprehensively and objectively evaluated only by judging the key technical indexes of the rotating speed transmitter, so that the corresponding system of the power plant is ensured to be normally put into operation, and the detection method for the rotating speed transmitter applied to the power plant is explained in detail below.
The embodiment of the invention evaluates the power plant applicability, the measurement precision and the reliability of the rotating speed transmitter through the regulation of the detecting method of the rotating speed transmitter and the corresponding index requirements; and then can verify accuracy such as power plant monitoring system passageway, protection action, provide the assurance for unit safe operation. The detection method of the rotating speed transmitter provided by the embodiment of the invention is characterized in that the rotating speed transmitter is installed to a rotating speed standard device, the rotating speed standard device applies a high-accuracy standard rotating speed value to the rotating speed transmitter, the digital multimeter displays an output value (for example, a current actual output value) measured by the rotating speed transmitter at a corresponding detection point, the output value is compared with a current reference value (a theoretical output value) to obtain a rotating speed transmitter measurement error value, and the applicability of the rotating speed transmitter is judged through a rotating speed transmitter repeatability value and a rotating speed indication value error value.
Before detecting the speed changer, the speed changer needs to be installed on the speed standard device, when the speed changer is installed, the speed changer is installed according to the specification requirements, and the digital multimeter is correctly connected through a lead, so that the connection is reliable, and after the speed changer is installed in place, the gap between the induction head of the speed changer and the gear tooth top of the speed standard device needs to be kept about 0.8mm (for example, 0.8 +/-0.05 mm). In the detection process, the rotating speed transmitter can directly sense the standard rotating speed set by the rotating speed standard device, outputs a corresponding electric signal and reads the electric signal through a digital multimeter connected with the corresponding electric signal.
After the rotating speed transmitter is installed in place, the rotating speed transmitter is preheated for 10 minutes or according to a specification before detection, and whether preset detection conditions are met or not is determined in the process: when the rotating speed standard device does not rotate, the actual current output value of the rotating speed transmitter is the minimum current reference value I of the preset range min For example: i is min Is 4 mA; second, the rotation speed standard device uses the maximum rotation speed nominal value of the rotation speed transmitter (the maximum current reference value I of the preset range of the rotation speed transmitter) max Corresponding rotational speed values, e.g. I max 20mA), i.e. the highest detected rotation speed point (I) is selected max A rotation speed point when 20mA is output), and when the digital multimeter normally displays the output value of the rotation speed transmitter, the preset detection condition is determined to be met, so that the detection work can be carried out.
The specific detection method comprises the following steps:
s502, acquiring an actual output value of the rotating speed transmitter under the condition that the rotating speed standard device operates with a reference value; the reference value corresponds to a detection point within a preset range of the speed transmitter.
Specifically, the rotating speed standard device runs by a rotating speed reference value, and a plurality of detection points are uniformly selected in the measuring range of the rotating speed transmitter, wherein the detection points comprise a highest detection rotating speed point (a maximum rotating speed nominal value), namely a rotating speed point when 20mA is output;
respectively adjusting the rotating speed standard device to each rotating speed value of the selected detection point, and continuously reading and recording an indication value of a preset number N on a digital multimeter connected with a rotating speed transmitter after the rotating speed output of the same detection point is stable, wherein the preset number N is 10 times, namely the actual current output value of the rotating speed transmitter; and simultaneously reading 10 times of rotating speed indications, namely the actual rotating speed output value of the rotating speed transmitter on a rotating speed transmitter display unit.
S504, calculating to obtain a measurement error value according to a first current difference value between the current actual output average value of the preset detection point and the current reference value.
In particular, the error value δ is measured I The calculation formula of (2) is as follows:
wherein, delta I For the measurement error value of the preset detection point, the first current difference value is: i is P -I O 。
Actual current output average value I of preset detection point p The calculation formula of (2) is as follows:
wherein, I p The current actual output average value, mA, of the preset detection point is provided; i is i The current actual output value, mA, detected for the ith time of the preset detection point; n is the preset times of detection of the preset detection point, and when the value of N is 10, the current actual output average value I of the preset detection point p The calculation formula of (2) is as follows:
presetting current reference value I of detection point 0 The calculation formula of (2) is as follows:
wherein, I 0 A current reference value, mA, of a preset detection point; n is 0 For presetting nominal value of rotation speed, n, of detection point max Presetting a maximum rotation speed nominal value of a measuring range, r/min, for the rotation speed transmitter; i is min Presetting a minimum current reference value, mA, of a measuring range for the rotating speed transmitter; i is max Presetting a maximum current reference value, mA, of a measuring range for the rotating speed transmitter; when I is min ＝4mA，I max When the current reference value I is 20mA, the current reference value I of the detection point is preset 0 The calculation formula of (2) is as follows:
s506, calculating a repeatability value according to a second current difference between the actual current output value of the preset detection point and the actual current output average value, wherein a calculation formula of the repeatability value is as follows:
wherein S is N For a repetitiveness value, the second current difference is: i is i -I P ；
s508, calculating to obtain a rotating speed indicating value error value according to a rotating speed difference value between the actual rotating speed output average value of the preset detection point and the rotating speed nominal value; specifically, the calculation formula of the rotation speed indicating value error value is as follows:
δ n ＝-n 0 ；
wherein, delta n The rotating speed indicating value error value of the preset detection point is obtained, n is the actual output average value of the rotating speed of the preset detection point, and r/min; n is 0 The rotation speed nominal value of the preset detection point is r/min.
S510, judging whether the error value meets a first preset condition or not, judging whether the repeatability value meets a second preset condition or not, and if so, determining that the rotating speed transmitter meets the use requirement, wherein the specific judgment conditions are as follows:
in this embodiment, the first preset condition includes: the measurement error of the rotating speed transmitter is as follows: delta is more than or equal to minus 10 percent I Less than or equal to 10 percent, and the error of the rotation speed indication is as follows: delta is less than or equal to-1 r/min n Less than or equal to 1 r/min; the second preset condition includes: the repeatability values were: s N Less than or equal to 5 percent; and when the first preset condition and the second preset condition are met, determining that the rotating speed transmitter meets the use requirement of the power plant, otherwise, indicating that the rotating speed transmitter is not suitable for the power plant.
In the detection method of the rotating speed transmitter provided by the embodiment of the invention, as shown in fig. 2, the method relates to a rotating speed standard device and the rotating speed transmitter, the rotating speed transmitter is provided with a picture display unit, the picture display unit comprises a digital multimeter display unit and a transmitter display unit, the digital multimeter is used for displaying a current value, the transmitter display unit is used for displaying a rotating speed, the rotating speed standard device is used for providing input of standard physical quantity, and the final purpose can be achieved by implementing detection of the rotating speed transmitter and judgment of measurement errors, repeatability and rotating speed indication errors:
(1) whether the rotating speed transmitter exceeds the maximum allowable error value can be accurately evaluated, namely whether a first preset condition and a second preset condition are met can be accurately determined;
(2) whether the rotating speed transmitter is suitable for being used by a power plant or not can be determined, the accuracy and the reliability of the rotating speed transmitter for the power plant are ensured, when the first preset condition and the second preset condition are met, the use requirement of the power plant is met, and the accuracy and the reliability of the rotating speed transmitter can be ensured;
(3) after the rotating speed transmitter is installed to a field measuring point, the rotating speed transmitter can effectively measure and find problems existing in the field by being matched with a monitoring system.
Therefore, the rotating speed transmitter in the embodiment solves the problems that the rotating speed transmitter for the power plant has no detection standard, cannot be correspondingly evaluated and has technical index loss, ensures that the rotating speed transmitter meeting the requirement can be selected, and can accurately detect the running state and the motion change of shafting machinery when being applied to a power plant system, thereby ensuring the safe and economic running of a unit.
It should be noted that, when the rotation speed transmitter in this embodiment is applied to a power plant, the first preset condition and the second preset condition need to be satisfied at the same time, but the protection scope of the present invention is not limited thereto, and when the rotation speed transmitter is used in other usage scenarios with low accuracy requirement, at least one of the conditions need to be satisfied.
In summary, the detection method of the rotation speed transmitter provided by the embodiment of the invention has the following technical effects:
1) the detection method provides detection basis for the rotating speed transmitter of the power plant.
2) The detection method is formed by accumulating and summarizing a large amount of data at the early stage, and can ensure the accuracy and stability of detection.
3) In the detection method, a rotating speed standard device is used instead of a common rotating speed table, so that standard uncertainty components introduced by a standard device during detection of a rotating speed transmitter are reduced.
4) In the detection method, a mode of uniformly selecting detection points in the measuring range of the rotating speed transmitter is adopted.
5) In the detection method, the full scale is detected as far as possible, the highest detection rotating speed point (the rotating speed point when the 20mA output is achieved) is included when the detection point is selected, namely the highest detection rotating speed point is selected for trial operation, and the output stability of the rotating speed transmitter can be ensured.
6) In the detection method, the measurement error output by the rotating speed transmitter can be obtained; the repeatability value can be obtained, and the experimental standard deviation shows the dispersibility of the measurement result of the rotating speed transmitter.
7) In the detection method, the measurement error of the rotating speed transmitter is better than +/-10%, the repeatability value is better than 5%, and the rotating speed indication error is better than +/-1 r/min, so that the actual requirement of model selection of the rotating speed transmitter of a power plant can be met.
The detection device for the rotating speed transmitter provided by the embodiment of the invention is applied to the detection method, and as shown in fig. 3, the detection device comprises:
the acquisition module is used for acquiring the actual output value of the rotating speed transmitter under the condition that the rotating speed standard device operates by a reference value; the reference value corresponds to a detection point in a preset range of the rotating speed transmitter;
the calculation module is used for calculating to obtain an error value according to the actual output value and the reference value; or, calculating to obtain a repeatability value according to the actual output value;
and the judging module is used for judging whether the error value meets a first preset condition and/or judging whether the repeatability value meets a second preset condition, and if so, determining that the rotating speed transmitter meets the use requirement.
The detection device for the rotational speed transmission provided by the embodiment of the invention has all the advantages of the detection method due to the application of the detection method, and the detailed description is omitted.
Finally, it should be further noted that, in this document, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to the embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A detection method of a rotating speed transmitter is characterized by being used for detecting the rotating speed transmitter arranged at a preset position of a rotating speed standard device, and the detection method comprises the following steps:
under the condition that the rotating speed standard device operates at a reference value, acquiring an actual output value of the rotating speed transmitter; the reference value corresponds to a detection point in a preset range of the rotating speed transmitter;
calculating to obtain an error value according to the actual output value and the reference value; and/or calculating to obtain a repeatability value according to the actual output value;
and judging whether the error value meets a first preset condition and/or judging whether the repeatability value meets a second preset condition, and if so, determining that the rotating speed transmitter meets the use requirement.
2. The detection method according to claim 1, wherein calculating an error value based on the actual output value and a reference value comprises:
calculating to obtain an actual output average value according to the actual output value of the preset detection point;
calculating to obtain an error value according to the difference value between the actual output average value of the preset detection points and the reference value; the error value is positively correlated with the actual output average value.
3. The detection method according to claim 2, wherein the calculating an error value based on the actual output average value and the reference value of the preset detection point comprises:
calculating to obtain a measurement error value according to a first current difference value between the current actual output average value of the preset detection point and a current reference value; the measurement error value is positively correlated with the first current difference value;
and/or calculating to obtain a rotating speed indicating value error value according to a rotating speed difference value between the actual output average value of the rotating speed of the preset detection point and the nominal value of the rotating speed; the rotating speed indication value error value is positively correlated with the rotating speed difference value.
4. The detection method according to claim 3, wherein the measurement error value is calculated by the formula:
wherein, delta I A measurement error value of a preset detection point is obtained;
5. The detection method according to claim 3, wherein the rotation speed indication error value is calculated by the formula:
δ n ＝n-n 0 ；
wherein, delta n Indicating the error value of the rotating speed of the preset detection point, wherein n is the actual output average value of the rotating speed of the preset detection point, and n is 0 The rotation speed nominal value of the preset detection point is obtained.
6. The detection method according to any one of claims 1 to 5, wherein said calculating a repeatability value based on said actual output value comprises the steps of:
calculating to obtain an actual current output average value according to the actual current output value of the preset detection point;
and calculating to obtain a repeatability value according to a second current difference value between the current actual output value of the preset detection point and the current actual output average value.
7. The detection method according to claim 6, wherein the repeatability value is calculated by the formula:
wherein S is N Is the repeatability value;
8. The sensing method of claim 7, wherein prior to said obtaining an actual output value of the speed transmitter, the sensing method further comprises the steps of:
preheating the rotating speed standard device, and operating at a maximum rotating speed nominal value until a preset detection condition is met;
wherein the preset detection condition comprises: the rotating speed standard device runs for a preset time at the maximum rotating speed nominal value, or the digital multimeter of the rotating speed transmitter can normally display an output value.
9. The detection method according to claim 7, wherein a plurality of preset detection points are uniformly selected within a preset range of the rotating speed transmitter, and the preset detection points comprise a detection point corresponding to a maximum reference value within the preset range;
and/or the range of the clearance between the induction point of the rotating speed transmitter and the gear tooth top of the rotating speed standard device is as follows: 0.8 +/-0.05 mm.
10. A detecting device of a rotation speed transmitter, characterized in that, when applied to the detecting method of any one of claims 1-9, the detecting device comprises:
the acquisition module is used for acquiring the actual output value of the rotating speed transmitter under the condition that the rotating speed standard device operates by a reference value; the reference value corresponds to a detection point in a preset range of the rotating speed transmitter;
the calculation module is used for calculating to obtain an error value according to the actual output value and the reference value; or, calculating to obtain a repeatability value according to the actual output value;
and the judging module is used for judging whether the error value meets a first preset condition and/or judging whether the repeatability value meets a second preset condition, and if so, determining that the rotating speed transmitter meets the use requirement.
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| CN202210354053.8A CN114966116A (en) | 2022-04-06 | 2022-04-06 | Detection method and detection device of rotating speed transmitter |
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| CN202210354053.8A CN114966116A (en) | 2022-04-06 | 2022-04-06 | Detection method and detection device of rotating speed transmitter |
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