CN113791239A - Diesel engine rotating speed signal preamplification device - Google Patents
Diesel engine rotating speed signal preamplification device Download PDFInfo
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- CN113791239A CN113791239A CN202111020547.4A CN202111020547A CN113791239A CN 113791239 A CN113791239 A CN 113791239A CN 202111020547 A CN202111020547 A CN 202111020547A CN 113791239 A CN113791239 A CN 113791239A
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- rotating speed
- speed signal
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- diesel engine
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- 238000012360 testing method Methods 0.000 claims abstract description 21
- 230000003321 amplification Effects 0.000 claims abstract description 17
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 17
- 238000007493 shaping process Methods 0.000 claims abstract description 13
- 238000004804 winding Methods 0.000 claims abstract description 10
- 230000001788 irregular Effects 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
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Classifications
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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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
The invention aims to provide a diesel engine rotating speed signal preamplification device which comprises a power supply module, a rotating speed signal amplification module, a rotating speed signal shaping module and a sensor test signal module, wherein the power supply module is externally connected with a direct current signal, the rotating speed signal amplification module amplifies a rotating speed signal output by a double-winding magnetoelectric rotating speed sensor arranged on a gear at the front end of a diesel engine into a rotating speed signal with a fixed amplitude, the rotating speed signal shaping module shapes the rotating speed signal with the fixed amplitude output by the rotating speed signal amplification module into a square wave signal with a regular waveform and outputs the square wave signal to a rotating speed signal application device, and the sensor test signal output by the rotating speed signal application device is amplified in power through a sensor test signal amplification circuit. The invention outputs the irregular rotating speed signal with smaller amplitude output by the double-winding magnetoelectric rotating speed sensor into the square wave signal with larger amplitude and fixed amplitude, so that the rotating speed signal of the diesel engine can effectively resist attenuation and interference in the transmission process, and the signal-to-noise ratio of the rotating speed signal is improved.
Description
Technical Field
The invention relates to a signal processing device of a diesel engine, in particular to a rotating speed signal processing device of the diesel engine.
Background
The rotation speed of the diesel engine is an important signal in a diesel engine system, and has important significance for monitoring the running state of the diesel engine.
Most of the rotation speed signals output by the magnetoelectric rotation speed sensors are pulse signals (approximate sine waves or rectangular waves) and are not regular square wave signals. When the diesel engine runs at a low rotating speed, the amplitude of a rotating speed signal output by a double-winding magnetoelectric rotating speed sensor arranged on a front-end gear of the diesel engine is small and irregular, if the rotating speed signal is transmitted for a long distance, the rotating speed signal is necessarily attenuated and interfered, and the signal-to-noise ratio is necessarily reduced.
The invention patent of publication number CN208190609 discloses an acoustic emission signal preamplification device, which is characterized in that a first amplifier is connected with a plurality of band-pass filters through a first switch selection switch, the plurality of band-pass filters can be configured with different filtering frequency domains, and the first switch selection switch can be used for forming switching selection of the filtering frequency domains, so that the device can adapt to various acoustic emission signal detection scenes. The invention does not relate to the amplification and shaping of the diesel engine speed signal.
The invention patent of publication number CN207251558U discloses a sensor signal preamplification device, which is characterized in that the device receives 12-40V alternating current and direct current power supply, a rectification circuit rectifies the alternating current and then isolates and transforms the alternating current to supply power to other parts, the device can provide constant current power supply for various sensors, and an instrument amplifier is adopted, so that a filter can be matched independently according to different use environments to achieve the best performance. The invention does not relate to the amplification and the shaping of the rotating speed signal output by the double-winding magnetoelectric rotating speed sensor which is arranged on the front end gear of the diesel engine and does not need to supply power, and the invention has no sensor testing and diagnosing functions.
Disclosure of Invention
The invention aims to provide a diesel engine rotating speed signal pre-amplification device for inputting and amplifying a rotating speed signal of an overspeed protection device.
The purpose of the invention is realized as follows:
the invention relates to a diesel engine rotating speed signal preamplification device, which is characterized in that: the device comprises a power module, a rotating speed signal amplifying module, a rotating speed signal shaping module and a sensor testing signal module, wherein the power module is externally connected with a direct current signal, the rotating speed signal amplifying module comprises a rotating speed signal amplifying circuit, the rotating speed signal amplifying circuit receives the power supply of the power module and amplifies a rotating speed signal output by a double-winding magnetoelectric rotating speed sensor arranged on a gear at the front end of a diesel engine into a rotating speed signal with a fixed amplitude, the rotating speed signal shaping module comprises a rotating speed signal rectifying circuit, the rotating speed signal rectifying circuit receives the power supply of the power module and shapes the rotating speed signal with the fixed amplitude output by the rotating speed signal amplifying module into a square wave signal with a regular waveform, and output to the rotating speed signal application device, the sensor test signal module comprises a sensor test signal amplifying circuit, when the diesel engine is in a shutdown state, the sensor test signal output by the rotating speed signal application device is subjected to power amplification through the sensor test signal amplification circuit.
The invention has the advantages that: the invention outputs the irregular rotating speed signal with smaller amplitude output by the double-winding magnetoelectric rotating speed sensor into the square wave signal with larger amplitude and fixed amplitude, so that the rotating speed signal of the diesel engine can effectively resist attenuation and interference in the transmission process, and the signal-to-noise ratio of the rotating speed signal is improved. The sensor test signal module can detect and diagnose whether the double-winding magnetoelectric rotating speed sensor can work normally or not.
Drawings
FIG. 1 is a schematic structural diagram of the apparatus of the present invention.
Detailed Description
The invention will now be described in more detail by way of example with reference to the accompanying drawings in which:
with reference to fig. 1, the diesel engine speed signal preamplifier of the invention comprises the following four modules: the device comprises a power module 1, a rotating speed signal amplifying module 2, a rotating speed signal shaping module 3 and a sensor test signal module 4.
The power module of the diesel engine rotating speed signal pre-amplification device is externally connected with a 24V direct current signal and supplies power for the rotating speed signal amplification module and the rotating speed signal shaping module.
The rotation speed signal amplifying module of the diesel engine rotation speed signal pre-amplifying device mainly comprises a rotation speed signal amplifying circuit. The amplifying circuit of the rotating speed signal amplifying module receives power supply of the power supply module and amplifies a rotating speed signal output by a double-winding magnetoelectric rotating speed sensor arranged on a front-end gear of the diesel engine into a rotating speed signal with a fixed amplitude.
The rotating speed signal shaping module of the diesel engine rotating speed signal pre-amplifying device mainly comprises a rotating speed signal rectifying circuit. And a shaping circuit of the rotating speed signal shaping module receives the power supply of the power supply module, shapes the rotating speed signal with fixed amplitude output by the rotating speed signal amplifying module into a square wave signal with a regular waveform, and outputs the square wave signal to the rotating speed signal application device.
The sensor test signal module of the diesel engine rotating speed signal preamplification device mainly comprises a sensor test signal amplification circuit. When the diesel engine is in a shutdown state, the sensor test signal output by the rotating speed signal application device cannot directly excite the double-winding magnetoelectric rotating speed sensor, and power amplification is required to be carried out through the sensor test signal amplification circuit so as to meet excitation requirements, so that the detection and diagnosis functions of the sensor test signal amplification circuit are realized.
Claims (1)
1. A diesel engine rotational speed signal preamplification device is characterized in that: the device comprises a power module, a rotating speed signal amplifying module, a rotating speed signal shaping module and a sensor testing signal module, wherein the power module is externally connected with a direct current signal, the rotating speed signal amplifying module comprises a rotating speed signal amplifying circuit, the rotating speed signal amplifying circuit receives the power supply of the power module and amplifies a rotating speed signal output by a double-winding magnetoelectric rotating speed sensor arranged on a gear at the front end of a diesel engine into a rotating speed signal with a fixed amplitude, the rotating speed signal shaping module comprises a rotating speed signal rectifying circuit, the rotating speed signal rectifying circuit receives the power supply of the power module and shapes the rotating speed signal with the fixed amplitude output by the rotating speed signal amplifying module into a square wave signal with a regular waveform, and output to the rotating speed signal application device, the sensor test signal module comprises a sensor test signal amplifying circuit, when the diesel engine is in a shutdown state, the sensor test signal output by the rotating speed signal application device is subjected to power amplification through the sensor test signal amplification circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111020547.4A CN113791239A (en) | 2021-09-01 | 2021-09-01 | Diesel engine rotating speed signal preamplification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111020547.4A CN113791239A (en) | 2021-09-01 | 2021-09-01 | Diesel engine rotating speed signal preamplification device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113791239A true CN113791239A (en) | 2021-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111020547.4A Pending CN113791239A (en) | 2021-09-01 | 2021-09-01 | Diesel engine rotating speed signal preamplification device |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4022170A (en) * | 1975-04-22 | 1977-05-10 | Chrysler Corporation | Circuit for generating a temperature compensated throttle advance signal having position and rate components |
| GB1501666A (en) * | 1975-04-18 | 1978-02-22 | Csepel Vas Es Femmuevek Hirada | Method and apparatus for testing the fuel injection system of a diesel engine |
| CN101625373A (en) * | 2009-08-04 | 2010-01-13 | 上海汽车集团股份有限公司 | Device and method for judging and detecting signals of rotational speed sensor |
| CN203925747U (en) * | 2014-07-03 | 2014-11-05 | 湖北科技学院 | Middle low power diesel generating set protector |
| CN104422785A (en) * | 2013-09-06 | 2015-03-18 | 北京理工大学 | Device and method for processing magneto-electric revolution speed transducer |
| CN106089600A (en) * | 2016-06-20 | 2016-11-09 | 大唐（赤峰）新能源有限公司 | The detection device of a kind of Wind turbines overspeed protection system and detection method thereof |
| CN106382165A (en) * | 2016-11-25 | 2017-02-08 | 北京理工大学 | On-line fault detection method and system for diesel engine |
| CN109667728A (en) * | 2018-12-21 | 2019-04-23 | 北京金风科创风电设备有限公司 | Fault detection method and device for wind generating set rotating speed sensor |
| CN110160799A (en) * | 2018-03-23 | 2019-08-23 | 中国人民解放军陆军工程大学 | Timing mark circuit for determining oil injection time of diesel engine |
-
2021
- 2021-09-01 CN CN202111020547.4A patent/CN113791239A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1501666A (en) * | 1975-04-18 | 1978-02-22 | Csepel Vas Es Femmuevek Hirada | Method and apparatus for testing the fuel injection system of a diesel engine |
| US4022170A (en) * | 1975-04-22 | 1977-05-10 | Chrysler Corporation | Circuit for generating a temperature compensated throttle advance signal having position and rate components |
| CN101625373A (en) * | 2009-08-04 | 2010-01-13 | 上海汽车集团股份有限公司 | Device and method for judging and detecting signals of rotational speed sensor |
| CN104422785A (en) * | 2013-09-06 | 2015-03-18 | 北京理工大学 | Device and method for processing magneto-electric revolution speed transducer |
| CN203925747U (en) * | 2014-07-03 | 2014-11-05 | 湖北科技学院 | Middle low power diesel generating set protector |
| CN106089600A (en) * | 2016-06-20 | 2016-11-09 | 大唐（赤峰）新能源有限公司 | The detection device of a kind of Wind turbines overspeed protection system and detection method thereof |
| CN106382165A (en) * | 2016-11-25 | 2017-02-08 | 北京理工大学 | On-line fault detection method and system for diesel engine |
| CN110160799A (en) * | 2018-03-23 | 2019-08-23 | 中国人民解放军陆军工程大学 | Timing mark circuit for determining oil injection time of diesel engine |
| CN109667728A (en) * | 2018-12-21 | 2019-04-23 | 北京金风科创风电设备有限公司 | Fault detection method and device for wind generating set rotating speed sensor |
Non-Patent Citations (1)
| Title |
|---|
| 李文辉等: "面向对象的双燃料低速发动机燃料***控制建模仿真", 船舶工程, vol. 41, pages 170 - 173 * |
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Application publication date: 20211214 |
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| RJ01 | Rejection of invention patent application after publication |