CN115372653A - Rotating speed signal conversion device and rotating speed signal conversion and measurement method - Google Patents
Rotating speed signal conversion device and rotating speed signal conversion and measurement method Download PDFInfo
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- CN115372653A CN115372653A CN202210391159.5A CN202210391159A CN115372653A CN 115372653 A CN115372653 A CN 115372653A CN 202210391159 A CN202210391159 A CN 202210391159A CN 115372653 A CN115372653 A CN 115372653A
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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
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
- G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
- G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D17/00—Monitoring or testing of wind motors, e.g. diagnostics
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
- G01R31/343—Testing dynamo-electric machines in operation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The application relates to the technical field of generator equipment, in particular to a rotating speed signal conversion device and a rotating speed signal conversion and measurement method, wherein the signal conversion device comprises a shell and a signal converter arranged in the shell; the signal converter comprises a power supply module and a signal conversion module which are arranged on the circuit mainboard; the power supply module is connected with the signal conversion module and used for supplying power to the signal conversion module; the signal conversion module is used for converting an input signal; the signal converter can convert voltage or current rotating speed signals output by a generator controller system into corresponding N-frequency-doubled high-precision rotating speed pulse signals; and then the high-precision rotating speed pulse signal is transmitted to a monitoring and diagnosing system of the wind driven generator, so that the acquisition of a high-precision rotating speed measured value and the tracking and sampling of the rotating speed can be realized, and the accuracy and the diagnosing effect of the monitoring of the rotating speed of the wind driven generator are improved.
Description
Technical Field
The application relates to the technical field of generator equipment, in particular to a rotating speed signal conversion device and a rotating speed signal conversion and measurement method.
Background
The direct-drive wind driven generator is generally applied to wind power generation equipment and converts wind energy into electric energy; the method comprises the steps of measuring the rotating speed of the wind driven generator, wherein a proximity switch or an encoder is additionally arranged at the end of the wind driven generator to acquire the rotating speed by a conventional method; the wind driven generator is low in rotating speed, the rotating speed measuring disc of the wind driven generator is arranged in the hub, a proximity switch or the number of measured teeth is not convenient to install additionally in the rotating speed measuring disc, and the measuring precision is low. Signals of the rotating speed encoder and/or the hub proximity switch are directly connected with the controller, and cannot be externally supplied to an additionally-installed wind driven generator monitoring and diagnosing system for use, the controller only can supply voltage and current rotating speed signals, and cannot output and provide high-precision rotating speed pulse signals to the monitoring and diagnosing system, and the accuracy of rotating speed measurement of the generator is poor.
Under the condition that the high-precision rotating speed pulse cannot be obtained based on the conventional method, innovative solutions meeting application requirements are urgently needed in the industry.
Disclosure of Invention
The invention provides a rotating speed signal conversion device, a rotating speed signal conversion method and a rotating speed signal measurement method, which are used for solving the problems that a high-precision rotating speed pulse signal cannot be obtained and the rotating speed measurement accuracy of a generator is poor in the background technology.
The technical scheme provided by the invention is as follows:
the invention provides a rotational speed signal conversion device, comprising:
the signal converter comprises a power supply module and a signal conversion module which are arranged on the circuit main board;
the power supply module is connected with the signal conversion module and used for supplying power to the signal conversion module;
the signal conversion module is used for converting an input signal.
Furthermore, two ends of the signal conversion module are respectively connected with a signal input port and a signal output port, a filtering module is arranged between the signal input port and the signal conversion module, and the filtering module is used for filtering input signals.
Furthermore, the filtering module comprises a first resistor and a first capacitor which are connected in series, the signal input end of the signal conversion module is connected between the first resistor and the first capacitor, the other end of the first resistor is connected with the signal input port, and the other end of the first capacitor is grounded.
Furthermore, the filtering module further comprises an adjusting resistor, and the adjusting resistor is connected with the first resistor and used for adjusting and controlling the resistance value of the resistor of the filtering module.
Further, the signal conversion module includes: the circuit comprises a conversion chip, a second capacitor, a third capacitor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor and a ninth resistor;
one end of the second capacitor is grounded, the other end of the second capacitor is connected with the second resistor, the other end of the second resistor is connected with the VSS end of the conversion chip, and a second voltage input is connected between the second resistor and the VSS end of the conversion chip; the RC end of the conversion chip is connected between the second capacitor and the second resistor which are connected in series;
one end of the third resistor and one end of the fourth resistor which are connected in series are grounded, and the other end of the third resistor and the other end of the fourth resistor which are connected in series are connected with an IREF end of the conversion chip;
the fifth resistor is connected with the sixth resistor in series, the other end of the fifth resistor is connected with the THRESH end of the conversion chip, and the other end of the sixth resistor is grounded;
the seventh resistor, the third capacitor and the eighth resistor are sequentially connected in series, and the other end of the seventh resistor is connected with the IOUT end of the conversion chip; the other end of the eighth resistor is connected with a second voltage input, and the third capacitor is connected with the fifth resistor in parallel;
one end of the ninth resistor is connected with a second voltage input, and the other end of the ninth resistor is connected with a signal FOUT end of the conversion chip.
Further, the power supply module includes: the power supply comprises a power supply chip, a socket, a diode, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor and a tenth resistor; the socket, the diode, the power chip and the tenth resistor are sequentially connected in series;
the fourth capacitor and the fifth capacitor which are connected in parallel are arranged between the diode and the power supply chip, one end of the fourth capacitor and one end of the fifth capacitor which are connected in parallel are connected with the Vin end of the power supply chip, and the other end of the fourth capacitor and the other end of the fifth capacitor which are connected in parallel are grounded; a first input voltage is arranged between the diode and the fourth capacitor and the fifth capacitor which are connected in parallel;
the sixth capacitor and the seventh capacitor which are connected in parallel are arranged between the power supply chip and the tenth resistor, one end of the sixth capacitor and one end of the seventh capacitor which are connected in parallel are connected with the Vout end of the power supply chip, and the other end of the sixth capacitor and the other end of the seventh capacitor which are connected in parallel are grounded.
Furthermore, the device further comprises a first protection circuit, a second protection circuit and a third protection circuit, wherein one end of the first protection circuit is grounded, and the other end of the first protection circuit is connected to the first voltage input; the first protection circuit is used for protecting the power supply module;
one end of the second protection circuit is grounded. The other end of the second protection circuit is connected between the signal input port and the filtering module;
one end of the third protection circuit is grounded, and the other end of the third protection circuit is connected between the signal output end of the signal conversion module and the signal output port.
Further, the first protection circuit comprises a lightning protection diode; the second protection circuit comprises an anti-static TVS tube; the third protection circuit comprises an anti-static TVS tube.
The invention also provides a rotating speed signal conversion and rotating speed measurement method of the generator, which comprises the rotating speed signal conversion device and comprises the following steps:
acquiring a first rotating speed signal of a generator;
obtaining a corresponding voltage or current rotating speed signal based on the first rotating speed signal;
converting to obtain an N frequency multiplication rotating speed pulse signal based on the voltage or current rotating speed signal, wherein N is a positive number;
and calculating to obtain the rotating speed of the generator based on the N frequency multiplication rotating speed pulse signal.
Further, acquiring a first rotating speed signal, and acquiring a source of the first rotating speed signal by acquiring an encoder or a proximity switch installed at the end of a generator;
the obtaining of the corresponding voltage or current rotation speed signal based on the first rotation speed signal specifically includes: the control system of the generator analyzes, compiles and programs the acquired first rotating speed signal, and outputs the first rotating speed signal through a voltage or current output port of the controller system, wherein the output signal is a voltage or current rotating speed signal;
the converting based on the voltage or current rotating speed signal to obtain an N-fold frequency rotating speed pulse signal specifically comprises: inputting voltage or current rotating speed signals to the rotating speed signal conversion device, and correspondingly converting and outputting corresponding N frequency multiplication rotating speed pulse signals by the rotating speed signal conversion device;
the calculating of the rotating speed of the generator based on the N frequency multiplication rotating speed pulse signal specifically comprises: and the monitoring and diagnosing system of the generator identifies and calculates the input N frequency multiplication rotating speed pulse signal to obtain a rotating speed measured value of the generator and finish rotating speed tracking sampling.
Has the beneficial effects that:
compared with the prior art, the rotating speed signal conversion device has the advantages that the rotating speed signal acquired and output by the generator end is analyzed and compiled into the voltage or current rotating speed signal by using the controller system of the generator, and the voltage or current rotating speed signal can be converted and output into the N-frequency-doubled high-precision rotating speed pulse signal through the signal converter; the high-precision rotating speed pulse signal is transmitted to the wind driven generator monitoring and diagnosing system, so that the acquisition of a high-precision rotating speed measured value and the rotating speed tracking sampling can be realized, and the accuracy and the diagnosing effect of the monitoring of the rotating speed of the wind driven generator are improved.
The beneficial effects of the method for converting and measuring the rotating speed signal provided by the invention correspond to the beneficial effects of the rotating speed signal conversion device provided by the invention, and repeated description is omitted.
Drawings
In order to more clearly illustrate the embodiments of the present application 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 description below are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a block diagram of a rotational speed signal conversion apparatus according to an embodiment of the present invention;
FIG. 2 is a circuit diagram of the power module of FIG. 1;
FIG. 3 is a circuit diagram of the filtering module and the signal conversion module of FIG. 1;
FIG. 4 is a block diagram of the signal conversion application of the rotational speed signal conversion apparatus according to the present invention;
FIG. 5 is a block diagram of the process of the method for converting the rotational speed signal and measuring the rotational speed of the generator according to the present invention;
FIG. 6a is a graph showing the tracking and sampling effects of a rotating speed pulse signal measured by a conventional measurement method;
FIG. 6b is a diagram of the spectrum effect of the tachometer pulse signal analysis measured by the conventional measurement method;
FIG. 7a is a graph illustrating the tracking and sampling effects of the tachometer pulse signal measured in accordance with the present invention;
FIG. 7b is a graph of the effect of the analyzed frequency spectrum of the tachometer pulse signal measured in the manner of the present invention;
reference numerals: 1. signal converter, 1.1, power module, 1.2, signal conversion module, 1.3, protection module.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It will be understood that when an element is referred to as being "fixed" or "disposed" to another element, it can be directly on the other element or be indirectly disposed on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, refer to an orientation or positional relationship illustrated in the drawings for convenience in describing the present application and to simplify description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, the meaning of a plurality of or a plurality of is two or more unless specifically limited otherwise.
It should be understood that the structures, ratios, sizes, and the like shown in the drawings are only used for matching the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the practical limit conditions of the present application, so that the modifications of the structures, the changes of the ratio relationships, or the adjustment of the sizes, do not have the technical essence, and the modifications, the changes of the ratio relationships, or the adjustment of the sizes, are all within the scope of the technical contents disclosed in the present application without affecting the efficacy and the achievable purpose of the present application.
Referring to fig. 1, the present invention provides a rotational speed signal conversion apparatus, including: the signal converter 1 comprises a power module 1.1 and a signal conversion module 1.2 which are arranged on a circuit mainboard;
the power supply module is connected with the signal conversion module and used for supplying power to the signal conversion module;
the signal conversion module is used for converting an input signal.
In the technical scheme, a controller system of the generator analyzes and compiles a rotating speed signal acquired and output by a generator end into a voltage or current rotating speed signal, and the voltage or current rotating speed signal can be converted and output into an N-frequency-multiplied high-precision rotating speed pulse signal through a signal converter; the high-precision rotating speed pulse signal is output to the wind driven generator monitoring and diagnosing system, so that the acquisition of a high-precision rotating speed measured value and the real-time rotating speed tracking sampling can be realized, and the accuracy and the diagnosing effect of the rotating speed monitoring of the wind driven generator are improved.
As shown in fig. 2 and 3, R1 is a first resistor, R2 is a second resistor, R3 is a third resistor, R4 is a fourth resistor, R5 is a fifth resistor, R6 is a sixth resistor, R7 is a seventh resistor, R8 is an eighth resistor, R9 is a ninth resistor, R10 is a tenth resistor, R11 is an eleventh resistor, R12 is a twelfth resistor, C1 is a first capacitor, C2 is a second capacitor, C3 is a third capacitor, C4 is a fourth capacitor, C5 is a fifth capacitor, C6 is a sixth capacitor, C7 is a seventh capacitor, N1 is a power chip, U1 is a conversion chip, V1 is a diode, TVS1 is a lightning protection diode, V2 is an anti-static TVS tube, and CN1 is a double-row straight pin socket.
Referring to fig. 3, as some optional embodiments, two ends of the signal conversion module are respectively connected to a signal input port and a signal output port, and a filtering module is disposed between the signal input port and the signal conversion module and is used for filtering an input signal.
Preferably, the filtering module includes a first resistor and a first capacitor connected in series, a signal input end of the signal conversion module is connected between the first resistor and the first capacitor, the other end of the first resistor is connected to the signal input port, and the other end of the first capacitor is grounded. The filter composed of the first resistor and the first capacitor effectively reduces interference pulses in input voltage or current signals and improves the accuracy of signal conversion.
More preferably, the filtering module further includes a regulating resistor, and the regulating resistor is connected to the first resistor for regulating and controlling the resistance value of the filtering module, and expanding the filtering range of the interference pulse.
The adjusting resistor in the embodiment comprises an eleventh resistor and a twelfth resistor which are connected in parallel, and the adjusting resistor adopting a parallel structure is small in size and good in resistance adjusting range; the adjusting resistor can also adopt a sliding resistor.
Referring to fig. 3, the signal conversion module includes: the circuit comprises a conversion chip, a second capacitor, a third capacitor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor and a ninth resistor;
one end of the second capacitor is grounded, the other end of the second capacitor is connected with the second resistor, the other end of the second resistor is connected with the VSS end of the conversion chip, and a second voltage input is connected between the second resistor and the VSS end of the conversion chip; the RC end of the conversion chip is connected between the second capacitor and the second resistor which are connected in series;
one end of the third resistor and one end of the fourth resistor which are connected in series are grounded, and the other end of the third resistor and the other end of the fourth resistor which are connected in series are connected with the IREF end of the conversion chip;
the fifth resistor is connected with the sixth resistor in series, the other end of the fifth resistor is connected with the THRESH end of the conversion chip, and the other end of the sixth resistor is grounded;
the seventh resistor, the third capacitor and the eighth resistor are sequentially connected in series, and the other end of the seventh resistor is connected with the IOUT end of the conversion chip; the other end of the eighth resistor is connected with a second voltage input, and a third capacitor is connected with the fifth resistor in parallel;
one end of the ninth resistor is connected with a second voltage input, and the other end of the ninth resistor is connected with a signal FOUT end of the conversion chip.
In the conversion circuit: r3 and R4 are circuit conversion gain adjusting resistors, and linear proportional relation between input voltage or current signals and output rotating speed pulse signals can be changed by changing resistance values of R3 and R4;
c3 is a compensation capacitor, R6 is a compensation resistor, the C2 capacitor, the R2 resistor and the R5 resistor are used for conversion calculation of signals, and the set R5 resistor can effectively reduce the linear distortion degree of the conversion circuit; r7 and R8 are reserved resistors; r9 is a current-limiting resistor and can adjust the amplitude of the output rotating speed pulse signal; the conversion chip adopts a voltage-frequency converter, the preferred model is LM231, and the conversion chip is matched with a resistor and a capacitor arranged in a conversion circuit to realize the linear conversion of voltage-frequency, namely the frequency conversion from a voltage or current signal to a frequency doubling pulse signal; the rotating speed signal conversion device outputs a high-precision rotating speed pulse measured value with high precision.
The installation mouth has been seted up respectively at the casing both ends of this application device for the installation of signal input port and signal output port.
Referring to fig. 2, the power module includes: the power supply comprises a power supply chip, a socket, a diode, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor and a tenth resistor; the socket, the diode, the power chip and the tenth resistor are sequentially connected in series;
a fourth capacitor and a fifth capacitor which are connected in parallel are arranged between the diode and the power supply chip, one end of the fourth capacitor and one end of the fifth capacitor which are connected in parallel are connected with the Vin end of the power supply chip, and the other end of the fourth capacitor and the other end of the fifth capacitor which are connected in parallel are grounded; a first input voltage is arranged between the diode and the fourth capacitor and the fifth capacitor which are connected in parallel;
the sixth capacitor and the seventh capacitor which are connected in parallel are arranged between the power supply chip and the tenth resistor, one end of the sixth capacitor and one end of the seventh capacitor which are connected in parallel are connected with the Vout end of the power supply chip, and the other end of the sixth capacitor and the other end of the seventh capacitor which are connected in parallel are grounded.
The power supply chip preferably adopts a power supply chip with a model number of L7815 on the market and has a short-circuit protection function; the diode is an anti-reverse diode, and the maximum reverse voltage is 40V; the socket adopts a double-row straight pin socket, a first pin of the double-row straight pin socket is connected with a third pin in parallel and is grounded, and a second pin of the double-row straight pin socket is connected with a fourth pin in parallel and is connected with the diode.
The power conversion module can convert the second voltage input into the first voltage input for the signal conversion module to supply power, and in a specific application of this embodiment, the external 24V second voltage input is converted into the 15V first voltage input for the signal conversion module to supply power.
As some optional embodiments, the apparatus further includes a first protection circuit, a second protection circuit, and a third protection circuit, where one end of the first protection circuit is grounded, and the other end of the first protection circuit is connected to the first voltage input; the first protection circuit is used for protecting the power supply module;
one end of the second protection circuit is grounded. The other end of the second protection circuit is connected between the signal input port and the filtering module;
one end of the third protection circuit is grounded, and the other end of the third protection circuit is connected between the signal output end of the signal conversion module and the signal output port.
Preferably, the first protection circuit comprises a lightning protection diode; the second protection circuit comprises an anti-static TVS tube; the third protection circuit comprises an anti-static TVS tube.
The first protection circuit, the second protection circuit and the third protection circuit form a protection module 1.3 of the rotating speed signal conversion device, and external static electricity, overvoltage, short circuit and other faults are effectively protected.
Referring to fig. 4 to 5, the present invention further provides a method for converting a rotational speed signal and measuring a rotational speed of a generator, including the above rotational speed signal conversion apparatus, including the following steps:
acquiring a first rotating speed signal of a generator;
obtaining a corresponding voltage or current rotating speed signal based on the first rotating speed signal;
based on the voltage or current rotating speed signal, N frequency multiplication rotating speed pulse signals (high-precision rotating speed pulse signals) are obtained through conversion, wherein N is a positive number and can be set by self;
and calculating to obtain the rotating speed of the generator based on the N frequency multiplication rotating speed pulse signals.
Preferably, the first rotating speed signal is acquired by an encoder or a proximity switch installed at the end of the generator;
obtaining a corresponding voltage or current rotating speed signal based on the first rotating speed signal, which specifically comprises: the control system of the generator analyzes, compiles and programs the acquired first rotating speed signal, and outputs the first rotating speed signal through a voltage or current output port of the controller system, wherein the output signal is a voltage or current rotating speed signal;
in a specific application case, a PLC controller in a generator control system converts a first rotating speed signal acquired by an encoder or a proximity switch into a 0-10V analog real-time voltage rotating speed signal or a 0-20mA analog real-time current rotating speed signal in a digital manner.
Based on the voltage or current rotating speed signal, obtaining N frequency multiplication rotating speed pulse signals through conversion, and specifically comprising the following steps: inputting voltage or current rotating speed signals to a rotating speed signal conversion device, and correspondingly converting and outputting corresponding N frequency multiplication rotating speed pulse signals (high-precision rotating speed pulse signals) by the rotating speed signal conversion device;
the rotating speed signal conversion device converts the 0-10V or 0-20mA analog real-time rotating speed signal into an N frequency doubling rotating speed pulse signal, and then a high-precision rotating speed pulse signal is obtained.
Based on the N frequency multiplication rotating speed pulse signal, the rotating speed of the generator is obtained through calculation, and the method specifically comprises the following steps: the monitoring and diagnosing system of the generator identifies and calculates the input N frequency multiplication rotating speed pulse signal, the obtained measured value of the rotating speed of the generator is high in precision, real-time rotating speed tracking sampling can be completed, and the monitoring accuracy and the diagnosing effect of the monitoring and diagnosing system of the wind driven generator are guaranteed.
As can be seen from fig. 6a and 7a, compared with the conventional rotational speed pulse signal tracking sampling in the rotational speed tracking sampling process, the high-precision rotational speed pulse signal provided by the method of the present invention can obtain more pulse signal characteristics in the tracking sampling process at the same time period, and the tracking sampling result is more accurate. Referring to fig. 6b and fig. 7b, it can be seen that the spectrum analysis of the high-precision rotation speed pulse signal provided by the method of the present invention is clearer compared with the spectrum analysis of the conventional rotation speed pulse signal in the spectrum analysis process, and thereby the misdiagnosis and the false alarm caused by the data analysis error due to the unclear spectrum are effectively avoided.
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 these 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 rotational speed signal conversion apparatus, comprising:
the signal converter comprises a power supply module and a signal conversion module which are arranged on the circuit main board;
the power supply module is connected with the signal conversion module and used for supplying power to the signal conversion module;
the signal conversion module is used for converting an input signal.
2. A rotation speed signal conversion device according to claim 1, wherein the signal conversion module is connected to a signal input port and a signal output port at two ends thereof, and a filtering module is disposed between the signal input port and the signal conversion module and is used for filtering an input signal.
3. A device for converting a rotational speed signal according to claim 2, wherein the filtering module comprises a first resistor and a first capacitor connected in series, the signal input terminal of the signal converting module is connected between the first resistor and the first capacitor, the other terminal of the first resistor is connected to the signal input port, and the other terminal of the first capacitor is grounded.
4. A device for converting a rotational speed signal according to claim 3, wherein the filtering module further comprises an adjusting resistor, and the adjusting resistor is connected to the first resistor for adjusting and controlling the resistance of the filtering module.
5. A rotation speed signal conversion device according to any one of claims 2-4, wherein the signal conversion module comprises: the circuit comprises a conversion chip, a second capacitor, a third capacitor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor and a ninth resistor;
one end of the second capacitor is grounded, the other end of the second capacitor is connected with the second resistor, the other end of the second resistor is connected with the VSS end of the conversion chip, and a second voltage input is connected between the second resistor and the VSS end of the conversion chip; the RC end of the conversion chip is connected between the second capacitor and the second resistor which are connected in series;
one end of the third resistor and one end of the fourth resistor which are connected in series are grounded, and the other end of the third resistor and the other end of the fourth resistor which are connected in series are connected with the IREF end of the conversion chip;
the fifth resistor is connected with the sixth resistor in series, the other end of the fifth resistor is connected with the THRESH end of the conversion chip, and the other end of the sixth resistor is grounded;
the seventh resistor, the third capacitor and the eighth resistor are sequentially connected in series, and the other end of the seventh resistor is connected with the IOUT end of the conversion chip; the other end of the eighth resistor is connected with a second voltage input, and the third capacitor is connected with the fifth resistor in parallel;
one end of the ninth resistor is connected with a second voltage input, and the other end of the ninth resistor is connected with a signal FOUT end of the conversion chip.
6. A rotation speed signal conversion device according to claim 5, wherein the power supply module comprises: the power supply comprises a power supply chip, a socket, a diode, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor and a tenth resistor; the socket, the diode, the power chip and the tenth resistor are sequentially connected in series;
the fourth capacitor and the fifth capacitor which are connected in parallel are arranged between the diode and the power supply chip, one end of the fourth capacitor and one end of the fifth capacitor which are connected in parallel are connected with the Vin end of the power supply chip, and the other end of the fourth capacitor and the other end of the fifth capacitor which are connected in parallel are grounded; a first input voltage is arranged between the diode and the fourth capacitor and the fifth capacitor which are connected in parallel;
the sixth capacitor and the seventh capacitor which are connected in parallel are arranged between the power supply chip and the tenth resistor, one end of the sixth capacitor and one end of the seventh capacitor which are connected in parallel are connected with the Vout end of the power supply chip, and the other end of the sixth capacitor and the other end of the seventh capacitor which are connected in parallel are grounded.
7. A rotation speed signal conversion device according to claim 6, comprising a first protection circuit, a second protection circuit and a third protection circuit, wherein one end of the first protection circuit is grounded, and the other end of the first protection circuit is connected to the first voltage input; the first protection circuit is used for protecting the power supply module;
one end of the second protection circuit is grounded, and the other end of the second protection circuit is connected between the signal input port and the filtering module;
one end of the third protection circuit is grounded, and the other end of the third protection circuit is connected between the signal output end and the signal output port of the signal conversion module.
8. A tacho signal conversion apparatus according to claim 7, wherein the first protection circuit comprises a lightning protection diode; the second protection circuit comprises an anti-static TVS tube; the third protection circuit comprises an anti-static TVS tube.
9. A method for converting a rotational speed signal and measuring a rotational speed of a generator, comprising the rotational speed signal conversion apparatus of any one of claims 1 to 8, comprising the steps of:
acquiring a first rotating speed signal of a generator;
obtaining a corresponding voltage or current rotating speed signal based on the first rotating speed signal;
based on the voltage or current rotating speed signal, converting to obtain an N frequency multiplication rotating speed pulse signal, wherein N is a positive number;
and calculating to obtain the rotating speed of the generator based on the N frequency multiplication rotating speed pulse signals.
10. A method for converting a rotational speed signal and measuring a rotational speed according to claim 9, wherein the first rotational speed signal is obtained by collecting an encoder or a proximity switch installed at a generator end;
the obtaining of the corresponding voltage or current rotation speed signal based on the first rotation speed signal specifically includes: the control system of the generator analyzes, compiles and programs the acquired first rotating speed signal, and outputs the first rotating speed signal through a voltage or current output port of the controller system, wherein the output signal is a voltage or current rotating speed signal;
the converting based on the voltage or current rotating speed signal to obtain the N frequency multiplication rotating speed pulse signal specifically comprises: inputting a voltage or current rotating speed signal to the rotating speed signal conversion device, and correspondingly converting and outputting a corresponding N-frequency doubling rotating speed pulse signal by the rotating speed signal conversion device;
the calculating of the rotating speed of the generator based on the N frequency multiplication rotating speed pulse signal specifically comprises: and the monitoring and diagnosing system of the generator identifies and calculates the input N frequency multiplication rotating speed pulse signal to obtain a rotating speed measured value of the generator and finish rotating speed tracking sampling.
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| CN202210391159.5A CN115372653A (en) | 2022-04-14 | 2022-04-14 | Rotating speed signal conversion device and rotating speed signal conversion and measurement method |
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| CN202210391159.5A CN115372653A (en) | 2022-04-14 | 2022-04-14 | Rotating speed signal conversion device and rotating speed signal conversion and measurement method |
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| CN202210391159.5A Pending CN115372653A (en) | 2022-04-14 | 2022-04-14 | Rotating speed signal conversion device and rotating speed signal conversion and measurement method |
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