CN202285021U - Instrument for measuring wheel speed - Google Patents
Instrument for measuring wheel speed Download PDFInfo
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- CN202285021U CN202285021U CN2011204362889U CN201120436288U CN202285021U CN 202285021 U CN202285021 U CN 202285021U CN 2011204362889 U CN2011204362889 U CN 2011204362889U CN 201120436288 U CN201120436288 U CN 201120436288U CN 202285021 U CN202285021 U CN 202285021U
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Abstract
The utility model discloses an instrument for measuring wheel speed. The instrument for measuring the wheel speed comprises a sensor module, a signal processing module, a singlechip, an output module and a power supply module; the sensor module is connected with the input end of the signal processing module; the output end of the signal processing module is connected with the input end of the singlechip; the output end of the singlechip is connected with the output module; the instrument for measuring the wheel speed is characterized in that: the sensor module mainly comprises a Hall sensor; and the signal processing module comprises a frequency multiplier circuit and a counting circuit. Low-frequency rotation speed is stably measured and displayed by using a frequency multiplication technology and a software filter technology; and the instrument for measuring the wheel speed has a small volume, is modularized, and is good in seismic performance, and convenient to use.
Description
Technical field
The utility model relates to a kind of wheel speed measurement device, is specifically related to a kind of SCM Based intelligent wheel speed measurement appearance.
Background technology
Wheel speed measurement has widely in every field to be used, and for example, is used to measure vehicle wheel rotational speed, the lathe drill speed of the various vehicles, the rotary speed of oil drilling platform etc.
In the prior art, the measuring method of wheel speed is a lot, sees successively there are following three types from theoretical method: simulation velocimetry (like centrifugal tachometer), synchronous velocimetry (like the stroboscopic knotmeter) and counting velocimetry.Wherein, the counting velocimetry is divided into mechanical type fixed time method and electronic type fixed time method again.The electronic type fixed time method becomes main flow wheel speed measurement method in recent years owing to its digitized characteristics are easy to and the control system combination.
Electronic type fixed time method commonly used comprises electromagnetic type and photo-electric method; Though photoelectric sensor has the advantage that sample rate is fast, measurement range is wide; But; Working environment is had relatively high expectations, in abominable working environment such as vibrations, dust, be prone to produce the problem of measuring accuracy decline even sensor failure.
Typical electromagnetic sensor module adopts hall device to realize that hall device inside mainly is a substrate that semiconductor material is processed, and on the in-plane of substrate, adds an applied electric field.In this case, if on perpendicular to the substrate plane direction, the action of a magnetic field is arranged, the then inner electronics directed movement under the action of a magnetic field of substrate can produce Hall voltage between two sides of substrate.Its size and externally-applied magnetic field and voltage swing are directly proportional.The honeywell switch sensor volume is little, contactless, dynamic perfromance is good, long service life, has obtained widespread use in the wheel speed measurement field.But; Under slow-speed of revolution situation, when the single-chip microcomputer processing is counted and imported in the output pulse of hall device after shaping, can the meter situation not appear leaking owing to frequency matches; Cause the measurement data of wheel speed measurement appearance inaccurate, make the measuring accuracy under the different rotating speeds inconsistent.
Summary of the invention
The goal of the invention of the utility model provides a kind of wheel speed measurement appearance that can be applicable to various work condition environments, guarantees the measuring accuracy under various rotating speed.
For reaching the foregoing invention purpose; The technical scheme that the utility model adopts is: a kind of wheel speed measurement appearance; Comprise sensor assembly, signal processing module, single-chip microcomputer, output module and power module; Said sensor assembly inserts the input end of said signal processing module, and the output terminal of said signal processing module inserts the input end of said single-chip microcomputer, and the output terminal of said single-chip microcomputer connects output module; Said sensor assembly mainly is made up of Hall element, and said signal processing module comprises frequency multiplier circuit and counting circuit.
In the technique scheme, said signal processing module, single-chip microcomputer, output module and power module can be arranged in the measuring instrument body, and power module is responsible for producing the required various voltages of total system, supplies with each module, makes the total system operate as normal.The structure of Hall element be installed as routine techniques, usually, can magnetic be arranged on the runner to be measured, the stationkeeping of corresponding magnetic process is provided with Hall element, the output signal is connected to signal processing module through lead.Said signal processing module receives the signal of processes sensor module, is the chief component of system's operate as normal, mainly is made up of frequency multiplier circuit and counting circuit.The purpose of frequency multiplier circuit design is to realize slow-speed of revolution signal measurement, and it can be the low frequency signal frequency multiplication of sensor assembly a high-frequency signal, with the speeds match of realization and counting circuit and single-chip microcomputer.The frequency signal of counting circuit after to frequency multiplication counted, and inputs to single-chip microcomputer to count results.
Further technical scheme, said output module is made up of interface module and display module, and the output terminal of single-chip microcomputer is connected with display module through interface module.
In the technique scheme, said display module is made up of LCDs and driving circuit thereof.Driving circuit receives the data of single-chip microcomputer output, and converts liquid crystal into and can data presented show.
Because the technique scheme utilization, the utility model compared with prior art has advantage:
1, the utility model adopts electronic type timer counter mode to carry out wheel speed measurement, wherein, takes turns the speed counting through frequency doubling technology and handles; Can realize that the slow-speed of revolution accurately measures; During concrete the realization, can further on software, adopt filtering algorithm, the velocity jump phenomenon when overcoming test of low rotating speed; Make measurement result accurately and reliably, enlarged the usable range of wheel speed measurement appearance;
2, conceptual design modularization, the volume of the utility model are little, anti-seismic performance good, can adapt to bad working environment, adaptable across various industrial applications.
Description of drawings
Fig. 1 is that the composition module of the utility model embodiment connects block diagram.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further described:
Embodiment: referring to shown in Figure 1; A kind of wheel speed measurement appearance comprises sensor assembly, measuring instrument body and is installed on the intrinsic signal processing module of measuring instrument, single-chip microcomputer, output module and power module that said sensor assembly mainly is made up of Hall element; Rotation with mechanical wheel; Hall element output pulse signal, signal output part insert the input end of said signal processing module, after said signal processing module is handled signal; Its output terminal inserts the input end of said single-chip microcomputer, and the output terminal of said single-chip microcomputer connects output module.
In the present embodiment, said signal processing module comprises frequency multiplier circuit and counting circuit.Said output module is made up of interface module and display module; Said display module is made up of LCDs and driving circuit thereof; The output terminal of single-chip microcomputer converts shows signal to through interface module, by the driving circuit drives LCDs, shows the wheel speed data of measuring.
Claims (3)
1. wheel speed measurement appearance; Comprise sensor assembly, signal processing module, single-chip microcomputer, output module and power module; Said sensor assembly inserts the input end of said signal processing module, and the output terminal of said signal processing module inserts the input end of said single-chip microcomputer, and the output terminal of said single-chip microcomputer connects output module; It is characterized in that: said sensor assembly mainly is made up of Hall element, and said signal processing module comprises frequency multiplier circuit and counting circuit.
2. wheel speed measurement appearance according to claim 1 is characterized in that: said output module is made up of interface module and display module, and the output terminal of single-chip microcomputer is connected with display module through interface module.
3. wheel speed measurement appearance according to claim 2 is characterized in that: said display module is made up of LCDs and driving circuit thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204362889U CN202285021U (en) | 2011-11-07 | 2011-11-07 | Instrument for measuring wheel speed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204362889U CN202285021U (en) | 2011-11-07 | 2011-11-07 | Instrument for measuring wheel speed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202285021U true CN202285021U (en) | 2012-06-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204362889U Expired - Fee Related CN202285021U (en) | 2011-11-07 | 2011-11-07 | Instrument for measuring wheel speed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202285021U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103267869A (en) * | 2013-04-28 | 2013-08-28 | 张敏 | Double-headed high precision velocity sensor and working method |
| CN104330584A (en) * | 2014-11-10 | 2015-02-04 | 上海市离心机械研究所有限公司 | Method for measuring rotating speed of horizontal screw decanter centrifuge |
-
2011
- 2011-11-07 CN CN2011204362889U patent/CN202285021U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103267869A (en) * | 2013-04-28 | 2013-08-28 | 张敏 | Double-headed high precision velocity sensor and working method |
| CN104330584A (en) * | 2014-11-10 | 2015-02-04 | 上海市离心机械研究所有限公司 | Method for measuring rotating speed of horizontal screw decanter centrifuge |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120627 Termination date: 20131107 |