CN112253320A - Speed regulation controller and rotating speed obtaining method and device thereof - Google Patents
Speed regulation controller and rotating speed obtaining method and device thereof Download PDFInfo
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- CN112253320A CN112253320A CN202011086823.2A CN202011086823A CN112253320A CN 112253320 A CN112253320 A CN 112253320A CN 202011086823 A CN202011086823 A CN 202011086823A CN 112253320 A CN112253320 A CN 112253320A
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- 230000033228 biological regulation Effects 0.000 title claims abstract description 105
- 238000000034 method Methods 0.000 title claims abstract description 40
- 230000001105 regulatory effect Effects 0.000 claims description 35
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- 238000010586 diagram Methods 0.000 description 6
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D31/00—Use of speed-sensing governors to control combustion engines, not otherwise provided for
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
Abstract
The embodiment of the invention discloses a speed regulation controller and a rotating speed obtaining method and device thereof. The method for acquiring the rotating speed of the speed regulation controller adopts the main rotating speed sensor and the secondary rotating speed sensor to acquire the rotating speed. According to the technical scheme of the embodiment of the invention, the rotating speed adopted by the speed regulation controller is determined to be the rotating speed of the main rotating speed sensor, if the rotating speed of the main rotating speed sensor is reduced and the rotating speed gap is greater than or equal to the first threshold value, the speed regulation sensor is switched to the rotating speed adopting the secondary rotating speed sensor, the problem that the speed regulation controller is frequently switched among the rotating speeds of a plurality of rotating speed sensors as soon as the rotating speed of the diesel engine fluctuates is avoided, so that the control effect of the speed regulation controller on the rotating speed of the diesel engine is poor, and the stability of the diesel engine is low, the control effect of the speed regulation controller on the diesel engine is improved, and the operation of.
Description
Technical Field
The embodiment of the invention relates to the technical field of diesel engines, in particular to a speed regulation controller and a rotating speed obtaining method and device thereof.
Background
The rotational speed of the diesel engine is the rotational speed of the crankshaft, and is the instantaneous angular velocity of the crankshaft in a circular motion. The electronic speed regulation controller is adopted to regulate the rotating speed of the diesel engine, compared with a mechanical speed regulator, the electronic speed regulation controller is adopted to regulate the rotating speed of the diesel engine, so that higher precision and sensitivity can be achieved, and the electronic speed regulation controller needs to measure the actual rotating speed of the diesel engine so as to regulate the rotating speed of the diesel engine.
At present, generally adopt speed sensor to measure the actual rotational speed of getting the diesel engine to adopt two or a plurality of speed sensor to measure in order to improve and to get the precision, this makes electronic speed regulation controller need switch ceaselessly in two or a plurality of speed sensor when obtaining the actual rotational speed of diesel engine, with the accurate actual rotational speed of adoption. However, in practice, the actual rotation speed of the diesel engine is likely to fluctuate due to various reasons, so that when the electronic speed regulation controller acquires the actual rotation speed of the diesel engine, the electronic speed regulation controller switches between the rotation speeds of two or more rotation speed sensors too frequently, unnecessary interference is caused to the rotation speed regulation of the electronic speed regulation controller, and then the rotation speed regulation of the electronic speed regulation controller is hindered, so that the control effect of the speed regulation controller on the rotation speed of the diesel engine is poor, and the stability of the diesel engine is not high, thereby easily causing the safety problem of the diesel engine.
Disclosure of Invention
The invention provides a speed regulation controller and a rotating speed acquisition method and device thereof, which are used for preventing the speed regulation controller from frequently switching among rotating speeds of a plurality of rotating speed sensors as soon as the rotating speed of a diesel engine fluctuates, improving the control effect of the speed regulation controller on the diesel engine and ensuring the stable operation of the diesel engine.
In a first aspect, an embodiment of the present invention provides a method for acquiring a rotation speed of a speed regulation controller, where the speed regulation controller acquires the rotation speed by using a primary rotation speed sensor and a secondary rotation speed sensor; the method for acquiring the rotating speed of the speed regulation controller comprises the following steps: determining the rotating speed adopted by the speed regulation controller as the rotating speed of the main rotating speed sensor; if the rotating speed of the main rotating speed sensor is reduced and the rotating speed gap is greater than or equal to a first threshold value, the speed regulating controller is switched to adopt the rotating speed of the secondary rotating speed sensor; the rotational speed gap is determined by the rotational speed difference between the secondary rotational speed sensor and the primary rotational speed sensor.
Optionally, the method for acquiring the rotating speed of the speed regulation controller further includes: determining the rotating speed adopted by the speed regulation controller as the rotating speed of the secondary rotating speed sensor; if the rotating speed of the secondary rotating speed sensor is reduced and the rotating speed gap is smaller than or equal to the second threshold value, the speed regulating controller is switched to adopt the rotating speed of the main rotating speed sensor.
Optionally, the method for acquiring the rotating speed of the speed regulation controller further includes: if the rotating speed of the main rotating speed sensor is greater than or equal to the third threshold value or less than or equal to the fourth threshold value, the speed regulating controller is switched to adopt the rotating speed of the secondary rotating speed sensor, and an alarm signal is sent out.
Optionally, the method for acquiring the rotating speed of the speed regulation controller further includes: and if the rotating speed of the secondary rotating speed sensor is greater than or equal to the third threshold value or less than or equal to the fourth threshold value, the speed regulating controller is switched to adopt the rotating speed of the main rotating speed sensor, and an alarm signal is sent out.
Optionally, the method for acquiring the rotating speed of the speed regulation controller further includes: if the rotating speed of the main rotating speed sensor and the rotating speed of the secondary rotating speed sensor are both larger than or equal to a third threshold value or both smaller than or equal to a fourth threshold value, the speed regulating controller outputs a fault signal, and the speed regulating controller is taken over by the mechanical hydraulic control module.
Optionally, the first threshold is equal to the sum of the first comparison threshold and the hysteresis threshold; wherein the first comparison threshold is equal to fifteen percent of the rotational speed value of the primary rotational speed sensor and the hysteresis threshold is equal to five to ten percent of the rotational speed value of the primary rotational speed sensor.
Optionally, the second threshold is equal to a difference between the second comparison threshold and the hysteresis threshold; wherein the second comparison threshold is equal to twenty-five percent of the rotational speed value of the primary rotational speed sensor and the hysteresis threshold is equal to five to ten percent of the rotational speed value of the primary rotational speed sensor.
In a second aspect, an embodiment of the present invention further provides a rotation speed obtaining device for a speed regulation controller, where the speed regulation controller obtains a rotation speed by using a primary rotation speed sensor and a secondary rotation speed sensor; the rotating speed obtaining device of the speed regulation controller comprises:
the rotating speed determining module is used for determining the rotating speed adopted by the speed regulating controller as the rotating speed of the main rotating speed sensor;
the rotating speed switching module is used for switching to the rotating speed of the secondary rotating speed sensor if the rotating speed of the main rotating speed sensor is judged to be reduced and the rotating speed gap is larger than or equal to a first threshold value; the rotational speed gap is determined by the rotational speed difference between the secondary rotational speed sensor and the primary rotational speed sensor.
Optionally, the rotation speed determining module is further configured to determine a rotation speed adopted by the speed regulation controller as a rotation speed of the secondary rotation speed sensor; the rotating speed switching module is also used for switching to the rotating speed of the main rotating speed sensor if the rotating speed of the secondary rotating speed sensor is judged to be reduced and the rotating speed gap is smaller than or equal to a second threshold value.
In a third aspect, an embodiment of the present invention further provides a speed regulation controller, where the speed regulation controller is configured to execute the rotation speed obtaining method of the speed regulation controller according to the first aspect.
The rotating speed acquisition method of the speed regulation controller provided by the embodiment of the invention adopts the main rotating speed sensor and the secondary rotating speed sensor to acquire the rotating speed. According to the technical scheme of the embodiment of the invention, the rotating speed adopted by the speed regulation controller is determined to be the rotating speed of the main rotating speed sensor, if the rotating speed of the main rotating speed sensor is reduced and the rotating speed gap is greater than or equal to the first threshold value, the speed regulation sensor is switched to the rotating speed adopting the secondary rotating speed sensor, the problem that the speed regulation controller is frequently switched among the rotating speeds of a plurality of rotating speed sensors as soon as the rotating speed of the diesel engine fluctuates is avoided, so that the control effect of the speed regulation controller on the rotating speed of the diesel engine is poor, and the stability of the diesel engine is low, the control effect of the speed regulation controller on the diesel engine is improved, and the operation of.
Drawings
Fig. 1 is a flowchart of a method for acquiring a rotation speed of a speed controller according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the process of switching the governor controller from a rotational speed using the primary speed sensor to a rotational speed using the secondary speed sensor;
FIG. 3 is a flow chart of another method for acquiring the rotation speed of the governor controller according to the embodiment of the present invention;
FIG. 4 is a schematic diagram of the process of the governor controller switching from a rotational speed using the secondary speed sensor to a rotational speed using the primary speed sensor;
fig. 5 is a schematic structural diagram of a rotation speed obtaining device of a speed regulation controller according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
The speed regulation controllers mentioned in the embodiment are all electronic speed regulation controllers, and the rotating speeds of the diesel engines are all actual rotating speeds of crankshafts of the diesel engines, namely. Fig. 1 is a flowchart of a method for acquiring a rotation speed of a speed controller according to an embodiment of the present invention, where the speed controller acquires a rotation speed by using a primary rotation speed sensor and a secondary rotation speed sensor, and referring to fig. 1, the method for acquiring a rotation speed of a speed controller includes:
and S10, determining the rotating speed adopted by the speed regulation controller as the rotating speed of the main rotating speed sensor.
In this embodiment, the speed regulation controller acquires the rotating speed by using two rotating speed sensors, and determines one of the two rotating speed sensors as the primary rotating speed sensor and the other one as the secondary rotating speed sensor, so that when the rotating speed of the primary rotating speed sensor is greater than or equal to the rotating speed of the secondary rotating speed sensor, the speed regulation controller always adjusts the rotating speed of the diesel engine by using the rotating speed of the primary rotating speed sensor.
Illustratively, there are No. 1 rotation speed sensor and No. 2 rotation speed sensor, if it is determined that No. 1 rotation speed sensor is the main rotation speed sensor and No. 2 rotation speed sensor is the secondary rotation speed sensor, when the rotation speed of No. 1 rotation speed sensor is greater than or equal to the rotation speed of No. 2 rotation speed sensor, the speed regulating controller always adopts the rotation speed of No. 1 rotation speed sensor to regulate the rotation speed of the diesel engine.
S11, if the rotating speed of the main rotating speed sensor is reduced and the rotating speed gap is larger than or equal to the first threshold value, the speed regulating controller is switched to the rotating speed of the secondary rotating speed sensor; the rotational speed gap is determined by the rotational speed difference between the secondary rotational speed sensor and the primary rotational speed sensor.
Specifically, if the speed regulation controller detects that the rotating speed of the main rotating speed sensor is reduced and the rotating speed gap is greater than or equal to the first threshold value, the speed regulation controller switches the rotating speed of the main rotating speed sensor to the rotating speed of the secondary rotating speed sensor. The rotating speed clearance can be a difference value between the main rotating speed sensor and the secondary rotating speed sensor, that is, if the speed regulating controller detects that the rotating speed of the main rotating speed sensor is reduced and the rotating speed of the main rotating speed sensor is reduced until the difference value between the rotating speed of the main rotating speed sensor and the rotating speed of the secondary rotating speed sensor is larger than or equal to a first threshold value, the rotating speed of the main rotating speed sensor is switched to the rotating speed of the secondary rotating speed sensor by the speed regulating controller, so that the problem that the control effect of the speed regulating controller on the rotating speed of the diesel engine is poor and the stability of the diesel engine is not high due to the fact that the speed regulating controller is switched to the rotating speeds of the two rotating speed sensors easily and frequently as long as the difference value occurs between the two rotating speed sensors is avoided, and the control effect of the speed regulating controller on the diesel engine is improved, the operation of the diesel engine is more stable.
Optionally, the first threshold is equal to the sum of the first comparison threshold and the hysteresis threshold; wherein the first comparison threshold is equal to fifteen percent of the rotational speed value of the primary rotational speed sensor and the hysteresis threshold is equal to five to ten percent of the rotational speed value of the primary rotational speed sensor.
Specifically, the first comparison threshold is intended to limit the magnitude of the difference between the primary and secondary rotational speed sensors, and the hysteresis threshold is intended to further limit the difference between the primary and secondary rotational speed sensors on the basis of the first comparison threshold, so as to more accurately grasp the appropriate switching time that the governor controller employs for the rotational speed.
Referring to fig. 2, fig. 2 is a schematic diagram illustrating the process of switching the governor controller from the rotation speed using the primary rotation speed sensor to the rotation speed using the secondary rotation speed sensor, wherein the ordinate represents the rotation speed RPM of the diesel engine, and the abscissa represents the rotation speed gap percentage (rotation speed gap%), which may be the ratio of the difference between the rotation speed of the primary rotation speed sensor and the rotation speed of the secondary rotation speed sensor to the rotation speed of the primary rotation speed sensor, i.e., the ratio of the rotation speed gap to the rotation speed of the primary rotation speed sensor. In general, when the rotation speed of the main rotation speed sensor is reduced to a rotation speed clearance percentage less than or equal to ten percent, the speed regulation controller switches between the rotation speeds of the two rotation speed sensors, the switching times are frequent, and in this embodiment, the rotation speed of the main rotation speed sensor is not switched to the rotation speed of the secondary rotation speed sensor until the rotation speed of the main rotation speed sensor is reduced to a value greater than or equal to the first threshold value. For example, the first comparison threshold is equal to fifteen percent of the value of the rotational speed of the primary rotational speed sensor, the hysteresis threshold is equal to ten percent of the value of the rotational speed of the primary rotational speed sensor, and the switching from the rotational speed using the primary rotational speed sensor to the rotational speed using the secondary rotational speed sensor is not performed until the rotational speed of the primary rotational speed sensor decreases to greater than or equal to twenty-five percent.
Optionally, the method for acquiring the rotating speed of the speed regulation controller further includes: determining the rotating speed adopted by the speed regulation controller as the rotating speed of the secondary rotating speed sensor; if the rotating speed of the secondary rotating speed sensor is reduced and the rotating speed gap is smaller than or equal to the second threshold value, the speed regulating controller is switched to adopt the rotating speed of the main rotating speed sensor.
Fig. 3 is a flowchart of another method for acquiring a rotation speed of a throttle controller according to an embodiment of the present invention, and referring to fig. 3, the method for acquiring a rotation speed of a throttle controller includes:
and S20, determining the rotating speed adopted by the speed regulation controller as the rotating speed of the main rotating speed sensor.
S21, if the rotating speed of the main rotating speed sensor is reduced and the rotating speed gap is larger than or equal to the first threshold value, the speed regulating controller is switched to the rotating speed of the secondary rotating speed sensor; the rotational speed gap is determined by the rotational speed difference between the secondary rotational speed sensor and the primary rotational speed sensor.
And S22, determining the rotating speed adopted by the speed regulation controller as the rotating speed of the secondary rotating speed sensor.
Specifically, when the rotation speed to be used is the rotation speed of the sub rotation speed sensor, or after the rotation speed to be used is switched from the rotation speed of the main rotation speed sensor to the rotation speed of the sub rotation speed sensor, the governor switches from the rotation speed of the sub rotation speed sensor to the rotation speed of the main rotation speed sensor until the condition of step S23 described below is satisfied.
And S23, if the rotating speed of the secondary rotating speed sensor is reduced and the rotating speed gap is less than or equal to the second threshold value, the speed regulating controller is switched to adopt the rotating speed of the main rotating speed sensor.
Specifically, if the speed regulation controller detects that the rotating speed of the secondary rotating speed sensor is reduced and the rotating speed gap is smaller than or equal to the second threshold value, the speed regulation controller switches the rotating speed adopting the secondary rotating speed sensor to the rotating speed adopting the main rotating speed sensor. That is to say, if the speed regulation controller detects that the rotating speed of the secondary rotating speed sensor is reduced, and the rotating speed of the secondary rotating speed sensor is reduced until the difference value between the rotating speed of the secondary rotating speed sensor and the rotating speed of the main rotating speed sensor is equal to or smaller than the second threshold value, the rotating speed of the secondary rotating speed sensor is switched to the rotating speed of the main rotating speed sensor by the speed regulation controller, so that the problem that the stability of the diesel engine is not high due to poor control effect of the speed regulation controller on the rotating speed of the diesel engine because the rotating speed of the diesel engine is frequently and slightly fluctuated and the rotating speed of the two rotating speed sensors is immediately switched to be adopted by the speed regulation controller as long as the difference value occurs, namely, the speed regulation controller is easily and frequently switched between the rotating speeds of the two rotating speed sensors, is solved, the control.
Optionally, the second threshold is equal to a difference between the second comparison threshold and the hysteresis threshold; wherein the second comparison threshold is equal to twenty-five percent of the rotational speed value of the primary rotational speed sensor and the hysteresis threshold is equal to five to ten percent of the rotational speed value of the primary rotational speed sensor.
Specifically, the second comparison threshold is intended to limit the magnitude of the difference between the primary rotation speed sensor and the secondary rotation speed sensor, and the hysteresis threshold is intended to further limit the difference between the primary rotation speed sensor and the secondary rotation speed sensor on the basis of the second comparison threshold, so as to more accurately grasp the appropriate switching time that the governor controller adopts for the rotation speed.
Referring to fig. 4, fig. 4 is a schematic diagram illustrating the process of switching the governor controller from the rotation speed using the secondary rotation speed sensor to the rotation speed using the primary rotation speed sensor, wherein the ordinate represents the rotation speed RPM of the diesel engine, and the abscissa represents the rotation speed gap percentage (rotation speed gap%), which may be the ratio of the difference between the rotation speed of the primary rotation speed sensor and the rotation speed of the secondary rotation speed sensor to the rotation speed of the primary rotation speed sensor, i.e., the ratio of the rotation speed gap to the rotation speed of the primary rotation speed sensor. For example, the second comparison threshold is equal to twenty-five percent of the value of the rotational speed of the primary rotational speed sensor, the hysteresis threshold is equal to ten percent of the value of the rotational speed of the primary rotational speed sensor, and the rotational speed of the secondary rotational speed sensor is not switched to the rotational speed of the primary rotational speed sensor until the rotational speed of the primary rotational speed sensor decreases to less than or equal to fifteen percent.
Optionally, the method for acquiring the rotating speed of the speed regulation controller further includes: if the rotating speed of the main rotating speed sensor is greater than or equal to the third threshold value or less than or equal to the fourth threshold value, the speed regulating controller is switched to adopt the rotating speed of the secondary rotating speed sensor, and an alarm signal is sent out.
Specifically, a third threshold value and a fourth threshold value are arranged in the speed regulation controller, the third threshold value is larger than the normal working rotating speed of the diesel engine, and the fourth threshold value is smaller than the normal working rotating speed of the diesel engine. For example, if the normal operating speed of the diesel engine is 1000r/min, the third threshold value may be 1260r/min to 1300r/min, and the fourth threshold value may be 700r/min to 740 r/min. If the speed regulation controller detects that the rotating speed of the main rotating speed sensor is greater than or equal to a third threshold value or is less than or equal to a fourth threshold value, the rotating speed of the main rotating speed sensor is over deviated from the normal rotating speed of the diesel engine, the main rotating speed sensor is possibly abnormal, the speed regulation controller is switched to the rotating speed of the secondary rotating speed sensor, and an alarm signal is sent out.
Optionally, the method for acquiring the rotating speed of the speed regulation controller further includes: and if the rotating speed of the secondary rotating speed sensor is greater than or equal to the third threshold value or less than or equal to the fourth threshold value, the speed regulating controller is switched to adopt the rotating speed of the main rotating speed sensor, and an alarm signal is sent out.
Specifically, if the speed regulation controller detects that the rotating speed of the secondary rotating speed sensor is greater than or equal to a third threshold value or is less than or equal to a fourth threshold value, it indicates that the rotating speed of the secondary rotating speed sensor is too deviated from the normal rotating speed of the diesel engine, and it indicates that the secondary rotating speed sensor may be abnormal, at this moment, the speed regulation controller switches to the rotating speed of the primary rotating speed sensor, and sends out an alarm signal.
Optionally, the method for acquiring the rotating speed of the speed regulation controller further includes: if the rotating speed of the main rotating speed sensor and the rotating speed of the secondary rotating speed sensor are both larger than or equal to a third threshold value or both smaller than or equal to a fourth threshold value, the speed regulating controller outputs a fault signal, and the speed regulating controller is taken over by the mechanical hydraulic control module.
Specifically, when the rotating speed of the main rotating speed sensor and the rotating speed of the secondary rotating speed sensor both deviate from the normal rotating speed of the diesel engine too much, it is indicated that both the main rotating speed sensor and the secondary rotating speed sensor are likely to be abnormal, and at the moment, the mechanical hydraulic control module can take over the rotation speed regulation work of the diesel engine. In addition, when the rotating speed adopted by the speed regulation controller is too deviated from the normal rotating speed of the diesel engine or the speed regulation controller is abnormal, the output current of the speed regulation controller is almost equal to zero, and meanwhile, the rotating speed of the diesel engine can be gradually increased, so that the mechanical hydraulic control module automatically takes over the rotating speed regulation work of the diesel engine.
The embodiment of the invention also provides a rotating speed acquisition device of the speed regulation controller, wherein the speed regulation controller acquires the rotating speed by adopting the main rotating speed sensor and the secondary rotating speed sensor; fig. 5 is a schematic structural diagram of a rotation speed obtaining device of a governor controller according to an embodiment of the present invention, and referring to fig. 5, the rotation speed obtaining device 100 of the governor controller includes: a rotating speed determining module 101, configured to determine a rotating speed adopted by the speed regulation controller as a rotating speed of the main rotating speed sensor; a rotation speed switching module 102, configured to switch to a rotation speed using the secondary rotation speed sensor if it is determined that the rotation speed of the primary rotation speed sensor is reduced and the rotation speed gap is greater than or equal to a first threshold; the rotational speed gap is determined by the rotational speed difference between the secondary rotational speed sensor and the primary rotational speed sensor.
Specifically, in this embodiment, the speed regulation controller obtains the rotation speed by using two rotation speed sensors, the rotation speed determining module 101 determines one of the two rotation speed sensors as a primary rotation speed sensor, and the other one of the two rotation speed sensors as a secondary rotation speed sensor, and when the rotation speed of the primary rotation speed sensor is greater than or equal to the rotation speed of the secondary rotation speed sensor, the rotation speed determining module 101 always uses the rotation speed of the primary rotation speed sensor to regulate the rotation speed of the diesel engine.
If the rotation speed switching module 102 detects that the rotation speed of the main rotation speed sensor is decreasing and the rotation speed gap is greater than or equal to the first threshold, the rotation speed switching module 102 switches the rotation speed using the main rotation speed sensor to the rotation speed using the secondary rotation speed sensor. The rotating speed gap can be a difference value between the main rotating speed sensor and the secondary rotating speed sensor, that is, if the rotating speed switching module 102 detects that the rotating speed of the main rotating speed sensor is reduced and the rotating speed of the main rotating speed sensor is reduced until the difference value between the rotating speed of the main rotating speed sensor and the rotating speed of the secondary rotating speed sensor is greater than or equal to a first threshold value, the rotating speed switching module 102 switches the rotating speed of the main rotating speed sensor to the rotating speed of the secondary rotating speed sensor, so that the problem that the control effect of the speed regulating controller on the rotating speed of the diesel engine is poor and the stability of the diesel engine is not high due to the fact that the speed regulating controller is easily and frequently switched between the rotating speeds of the two rotating speed sensors due to frequent and small fluctuation of the rotating speed of the diesel engine is avoided, and the control effect of the speed regulating controller on the diesel engine is improved, the operation of the diesel engine is more stable.
Optionally, the first threshold is equal to the sum of the first comparison threshold and the hysteresis threshold; wherein the first comparison threshold is equal to fifteen percent of the rotational speed value of the primary rotational speed sensor and the hysteresis threshold is equal to five to ten percent of the rotational speed value of the primary rotational speed sensor.
Optionally, the rotation speed determining module 101 is further configured to determine that the rotation speed adopted by the speed regulation controller is the rotation speed of the secondary rotation speed sensor; the rotation speed switching module 102 is further configured to switch to the rotation speed of the primary rotation speed sensor if it is determined that the rotation speed of the secondary rotation speed sensor decreases and the rotation speed gap is less than or equal to the second threshold.
Specifically, the rotation speed determination module 101 switches the rotation speed using the secondary rotation speed sensor to the rotation speed using the primary rotation speed sensor when it is determined that the rotation speed using the secondary rotation speed sensor is the rotation speed of the secondary rotation speed sensor, or after it is determined that the rotation speed using the primary rotation speed sensor is switched to the rotation speed using the secondary rotation speed sensor, until the following condition is satisfied.
If the rotation speed switching module 102 detects that the rotation speed of the secondary rotation speed sensor is decreasing and the rotation speed gap is less than or equal to the second threshold, the rotation speed switching module 102 switches the rotation speed using the secondary rotation speed sensor to the rotation speed using the primary rotation speed sensor. That is, if the speed switching module 102 detects that the speed of the secondary speed sensor is decreasing, and until the rotation speed of the sub rotation speed sensor is reduced to a value where the difference from the rotation speed of the main rotation speed sensor is equal to or less than a second threshold value, the rotating speed switching module 102 switches the rotating speed of the secondary rotating speed sensor into the rotating speed of the main rotating speed sensor, so that the condition that the rotating speed of the diesel engine is frequently and slightly fluctuated, the speed regulating controller immediately switches between the rotating speeds of the two rotating speed sensors as long as a difference value appears between the two rotating speed sensors is avoided, namely, the speed regulating controller is easy to frequently switch between the rotating speeds of the two rotating speed sensors, so that the control effect of the speed regulating controller on the rotating speed of the diesel engine is poor, and then lead to the not high problem of diesel engine stability, promoted the control effect of speed controller to the diesel engine for the operation of diesel engine is more stable.
Optionally, the second threshold is equal to a difference between the second comparison threshold and the hysteresis threshold; wherein the second comparison threshold is equal to twenty-five percent of the rotational speed value of the primary rotational speed sensor and the hysteresis threshold is equal to five to ten percent of the rotational speed value of the primary rotational speed sensor.
Optionally, the rotation speed obtaining device of the speed regulation controller further comprises an alarm and fault module 103. The rotation speed switching module 102 is further configured to switch to the rotation speed of the secondary rotation speed sensor if it is determined that the rotation speed of the primary rotation speed sensor is greater than or equal to the third threshold, or is less than or equal to the fourth threshold, and the alarm and fault module 103 sends an alarm signal.
Optionally, the rotation speed switching module 102 is further configured to determine that, if the rotation speed of the secondary rotation speed sensor is greater than or equal to a third threshold, or is less than or equal to a fourth threshold, the speed regulation controller switches to the rotation speed using the primary rotation speed sensor, and the alarm and fault module 103 sends an alarm signal.
Optionally, the rotation speed switching module 102 is further configured to determine that, if the rotation speed of the primary rotation speed sensor and the rotation speed of the secondary rotation speed sensor are both greater than or equal to a third threshold, or both are less than or equal to a fourth threshold, the alarm and fault module 103 outputs a fault signal, and the rotation speed obtaining device 100 of the speed regulation controller is taken over by the mechanical hydraulic control module.
The rotating speed obtaining device 100 of the speed regulation controller provided in the embodiment of the present invention and the rotating speed obtaining method of the speed regulation controller in the above technical solutions belong to the same inventive concept, so that the same technical effect as the rotating speed obtaining method of the speed regulation controller can be achieved, and repeated contents are not repeated here.
The embodiment of the invention also provides a speed regulation controller, which is used for executing the rotating speed obtaining method of the speed regulation controller in the technical scheme.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. The method for acquiring the rotating speed of the speed regulation controller is characterized in that the speed regulation controller acquires the rotating speed by adopting a main rotating speed sensor and an auxiliary rotating speed sensor;
the method comprises the following steps:
determining the rotating speed adopted by the speed regulation controller as the rotating speed of the main rotating speed sensor;
if the rotating speed of the main rotating speed sensor is reduced and the rotating speed gap is larger than or equal to a first threshold value, the speed regulating controller is switched to adopt the rotating speed of the secondary rotating speed sensor; wherein the speed gap is determined by a difference in speed of the secondary and primary speed sensors.
2. The method for acquiring the rotating speed of the speed regulation controller according to claim 1, further comprising: determining the rotating speed adopted by the speed regulation controller as the rotating speed of the secondary rotating speed sensor; and if the rotating speed of the secondary rotating speed sensor is reduced and the rotating speed gap is less than or equal to a second threshold value, the speed regulating controller is switched to adopt the rotating speed of the main rotating speed sensor.
3. The method for acquiring the rotating speed of the speed regulation controller according to claim 1, further comprising: and if the rotating speed of the main rotating speed sensor is greater than or equal to a third threshold value or less than or equal to a fourth threshold value, the speed regulating controller switches to adopt the rotating speed of the secondary rotating speed sensor and sends out an alarm signal.
4. The method for acquiring the rotating speed of the speed regulation controller according to claim 1, further comprising: and if the rotating speed of the secondary rotating speed sensor is greater than or equal to the third threshold value or less than or equal to the fourth threshold value, the speed regulation controller switches to adopt the rotating speed of the main rotating speed sensor and sends out an alarm signal.
5. The method for acquiring the rotating speed of the speed regulation controller according to claim 1, further comprising: and if the rotating speed of the main rotating speed sensor and the rotating speed of the secondary rotating speed sensor are both greater than or equal to a third threshold value or are both less than or equal to a fourth threshold value, the speed regulation controller outputs a fault signal, and the speed regulation controller is taken over by a mechanical hydraulic control module.
6. The method for obtaining the rotating speed of the speed regulating controller according to claim 1,
the first threshold is equal to the sum of a first comparison threshold and a hysteresis threshold;
wherein the first comparison threshold is equal to fifteen percent of the rotational speed value of the primary rotational speed sensor and the hysteresis threshold is equal to five to ten percent of the rotational speed value of the primary rotational speed sensor.
7. The method for obtaining the rotating speed of the speed regulating controller according to claim 2,
the second threshold is equal to a difference between a second comparison threshold and the hysteresis threshold; wherein the second comparison threshold is equal to twenty-five percent of the primary speed sensor speed value and the hysteresis threshold is equal to five to ten percent of the primary speed sensor speed value.
8. The rotating speed acquisition device of the speed regulation controller is characterized in that the speed regulation controller acquires the rotating speed by adopting a main rotating speed sensor and an auxiliary rotating speed sensor;
the device comprises:
the rotating speed determining module is used for determining the rotating speed adopted by the speed regulating controller as the rotating speed of the main rotating speed sensor;
the rotating speed switching module is used for switching to the rotating speed of the secondary rotating speed sensor if the rotating speed of the main rotating speed sensor is judged to be reduced and the rotating speed gap is larger than or equal to a first threshold value; wherein the speed gap is determined by a difference in speed of the secondary and primary speed sensors.
9. The rotation speed obtaining device of the speed regulating controller according to claim 8,
the rotating speed determining module is also used for determining the rotating speed adopted by the speed regulating controller as the rotating speed of the secondary rotating speed sensor;
the rotating speed switching module is further used for switching to the rotating speed of the main rotating speed sensor if the rotating speed of the secondary rotating speed sensor is judged to be reduced and the rotating speed gap is smaller than or equal to a second threshold value.
10. A throttle control characterized by being used to execute the rotational speed acquisition method of the throttle control according to any one of claims 1 to 7.
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| CN202011086823.2A CN112253320A (en) | 2020-10-12 | 2020-10-12 | Speed regulation controller and rotating speed obtaining method and device thereof |
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| CN202011086823.2A CN112253320A (en) | 2020-10-12 | 2020-10-12 | Speed regulation controller and rotating speed obtaining method and device thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5365904A (en) * | 1993-07-23 | 1994-11-22 | Caterpillar Inc. | Redundant speed sensor for engine control |
| CN103410619A (en) * | 2013-08-27 | 2013-11-27 | 南车戚墅堰机车有限公司 | Diesel engine closed loop speed regulation system of diesel locomotive and speed regulation method thereof |
| CN106285979A (en) * | 2016-10-26 | 2017-01-04 | 无锡威孚高科技集团股份有限公司 | Engine rotational speed signal fault treating apparatus and processing method |
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2020
- 2020-10-12 CN CN202011086823.2A patent/CN112253320A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5365904A (en) * | 1993-07-23 | 1994-11-22 | Caterpillar Inc. | Redundant speed sensor for engine control |
| CN103410619A (en) * | 2013-08-27 | 2013-11-27 | 南车戚墅堰机车有限公司 | Diesel engine closed loop speed regulation system of diesel locomotive and speed regulation method thereof |
| CN106285979A (en) * | 2016-10-26 | 2017-01-04 | 无锡威孚高科技集团股份有限公司 | Engine rotational speed signal fault treating apparatus and processing method |
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Application publication date: 20210122 |