CN2909261Y - Universal motor tachometer - Google Patents
Universal motor tachometer Download PDFInfo
- Publication number
- CN2909261Y CN2909261Y CN 200620104360 CN200620104360U CN2909261Y CN 2909261 Y CN2909261 Y CN 2909261Y CN 200620104360 CN200620104360 CN 200620104360 CN 200620104360 U CN200620104360 U CN 200620104360U CN 2909261 Y CN2909261 Y CN 2909261Y
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Abstract
The utility model relates to a structure improvement of a motor rotation speed meter, including a shaping filter circuit, an operational amplifier circuit, CPU, a display driver circuit and a display device that are connected in turn. The shaping filter circuit is used to shape and filter the sine wave signal fed back from the motor and then the signal is sent into the operational amplifier circuit, which extracts the signal and operates and amplifies the signal into the rotation speed pulse signal that is transmitted to the CPU, which can calculate the actual motor rotation speed by detecting the frequency of the rotation speed pulse signal and then convert the rotation speed into a BCD code to output the display driver circuit, which amplifies the signal and sends to the display device to display. Therefore the utility model is not only inexpensive and can accurately measure the motor rotation speed, but also has a greatly improved reliability. Meanwhile, jumpers are connected, different pins are shorted circuit and then the rotation speeds of different types of motors can be measured, greatly increasing the practicability of the rotation speed.
Description
Technical field
The utility model relates to the instrument field, especially relates to a kind of structural improvement of motor speed table.
Background technology
The measurement of traditional motor speed is measured by sillometer, this tachometer gage need be pasted reflective sheeting on motor shaft, utilize the light of reflection to carry out to record rotating speed of motor after the signal Processing conversion again, its circuit part mainly comprises display circuit, light signal reception and processing section and drive signal part, this tachometer gage need be used velocity gauge, price comparison is expensive, and measure also inconvenient, and it is inaccurate and cause and measure error to be easy to the location when pasting reflective sheeting on the motor shaft, also wearing and tearing easily during reflective sheeting uses, need often to change, bring inconvenience for user's use, therefore, this class measurement mechanism is backward in technique, and accuracy is not high can't measure rotating speed of motor reliably.
Summary of the invention
It is a kind of cheap that the utility model provides, and can accurately measure motor speed, the reliability height, the general-purpose machine tachometer gage that stability is high mainly is to solve prior art medium speed table to use inconvenience, and reflective sheeting easily comes off easy to wear, the technical matters that reliability is not high.
Above-mentioned technical matters of the present utility model is mainly solved by following technical proposals: the general-purpose machine tachometer gage, it comprises the plastic filter circuit that links to each other successively, operation amplifier circuit, central processing unit, display driver circuit and display device, described plastic filter circuit will be from the next sine wave signal process shaping of motor feedback, send into operation amplifier circuit after the filtering, described operation amplifier circuit zooms into rotational speed pulse signal with the signal extraction union again and flows to described central processing unit, described central processing unit is by detecting the actual speed that can calculate motor after the rotational speed pulse signal frequency, change rotating speed into binary-coded decimal then and export to display driver circuit, display driver circuit flows to display device with the signal amplification again and shows.
As preferably, described plastic filter circuit is mainly contacted by two diode D1, D2 that are connected in parallel and other two diode D3, D4 that are connected in parallel and is constituted, the negative pole of described diode D1, D2 connects the positive pole of diode D3, D4, the positive pole of diode D1, D2 links to each other with resistance R 4 through resistance R 5, one tunnel ground connection of the negative pole of diode D3, D4, another road links to each other with resistance R 4 through resistance R 6, resistance R 5 and resistance R 6 also link together, the described operation amplifier circuit of another termination of resistance R 4.
As preferably, described operation amplifier circuit mainly is made of amplifier, the reverse input end connecting resistance R4 of described amplifier, one tunnel process resistance R 7 of the positive input of described amplifier, the other end of resistance R 7 is through resistance R 10 ground connection, connect direct supply through resistance R 9, another road of the positive input of described amplifier meets the output terminals A C OUT of amplifier through R8, an end that also is connected with resistance R 9 between resistance R 7 and resistance R 10 links to each other another termination direct supply of resistance R 9.
Measure different types of rotating speed of motor for convenience, as preferably, between operation amplifier circuit and central processing unit, be connected with three pin wire jumper J1, described central processing unit mainly adopts 8 singlechip chip U1 to realize, the output terminals A C OUT of described operation amplifier circuit connects 3 pin of J1,2 pin of described J1 connect 8 pin of U1, and 1 pin of J1 connects the direct current brushless motor speed signal output part.Wherein 1 pin and 2 pin short circuits can be used to measure direct current brushless motor speed, and 2 pin and tripod short circuit can be measured any motor speed that has tech-generator.
As preferably, described display driver circuit is a led drive circuit, and described display device is the digital display tube of LED.
The beneficial effects of the utility model are: device therefor is cheap, can accurately measure rotating speed of motor, and reliability and stability improve greatly; Simultaneously, adopt wire jumper to connect, the short circuit of different stitch can be measured different types of rotating speed of motor, has strengthened the practicality of tachometer gage greatly.
Description of drawings
Fig. 1 is a kind of circuit structure block diagram of the present utility model;
Fig. 2 is a kind of circuit theory diagrams of the present utility model.
Embodiment
Below by embodiment, and in conjunction with the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment: the DC brushless motor controller of present embodiment, as shown in Figure 1, comprise the plastic filter circuit 1 that links to each other successively, operation amplifier circuit 2, central processing unit 3, display driver circuit 4 and display device 5, as shown in Figure 2, the AC1 of plastic filter circuit 1, the AC2 two ends are the signal input part of tech-generator, plastic filter circuit 1 is main by two diode D1 that are connected in parallel, D2 and other two diode D3 that are connected in parallel, the D4 formation of contacting, diode D1 wherein, the negative pole of D2 meets diode D3, the positive pole of D4, diode D1, the positive pole of D2 links to each other with resistance R 4 through resistance R 5, diode D3, negative pole one tunnel ground connection of D4, another road links to each other with resistance R 4 through resistance R 6, resistance R 5 and resistance R 6 also link together, another termination operation amplifier circuit 2 of resistance R 4, operation amplifier circuit 2 mainly is made of amplifier, the reverse input end connecting resistance R4 of amplifier, one tunnel process resistance R 7 and resistance R 10 ground connection of the positive input of amplifier, another road meets the output terminals A C OUT of amplifier through R8, between resistance R 7 and resistance R 10, also be connected with resistance R 9, another termination direct supply of resistance R 9, the output terminals A C OUT of amplifier connects 3 pin of three pin wire jumper J1,2 pin of J1 connect 8 pin of central processing unit 3 chips U1,1 pin of J1 connects the direct current brushless motor speed signal output part, 1 pin of J1 and 2 pin short circuits, be used for measuring direct current brushless motor speed, and with 2 pin and the 3 pin short circuits of J1, can measure any rotating speed of motor that has tech-generator, the 14-19 pin of U1 connects 13 of U3 in the led drive circuit 4 respectively, 11,9,5,3,1 pin, 12 of U1,13 pin meet 3 of U4 in the led drive circuit 4 respectively, 1 pin, display device 5 adopts the digital display tube U5 of LED, 2 of U3,4,6,8,10,12 pin link to each other with the 1-6 pin of U5 respectively, 2 of U4,4,6,8,10,12 pin link to each other with the 7-12 pin of U5 respectively.
The course of work: plastic filter circuit 1 will be sent into operation amplifier circuit 2 after the next sine wave signal process shaping of motor feedback, filtering, operation amplifier circuit 2 zooms into rotational speed pulse signal with the signal extraction union again and flows to central processing unit 3, central processing unit 3 is by detecting the actual speed that can calculate motor after the rotational speed pulse signal frequency, then rotating speed is changed into binary-coded decimal and export to display driver circuit 4, display driver circuit 4 flows to display device 5 with the signal amplification again and shows.
Claims (5)
1. general-purpose machine tachometer gage, it is characterized in that it comprises the plastic filter circuit (1) that links to each other successively, operation amplifier circuit (2), central processing unit (3), display driver circuit (4) and display device (5), described plastic filter circuit (1) will be from the next sine wave signal process shaping of motor feedback, send into operation amplifier circuit (2) after the filtering, described operation amplifier circuit (2) zooms into the signal extraction union rotational speed pulse signal again and flows to described central processing unit (3), described central processing unit (3) is by detecting the actual speed that can calculate motor after the rotational speed pulse signal frequency, then rotating speed is changed into binary-coded decimal and export to display driver circuit (4), display driver circuit (4) flows to display device (5) with the signal amplification again and shows.
2. general-purpose machine tachometer gage according to claim 1, it is characterized in that described plastic filter circuit (1) is main by two diode D1 that are connected in parallel, D2 and other two diode D3 that are connected in parallel, the D4 formation of contacting, described diode D1, the negative pole of D2 meets diode D3, the positive pole of D4, diode D1, the positive pole of D2 links to each other with resistance R 4 through resistance R 5, diode D3, one tunnel ground connection of the negative pole of D4, another road links to each other with resistance R 4 through resistance R 6, resistance R 5 and resistance R 6 also link together, the described operation amplifier circuit of another termination (2) of resistance R 4.
3. general-purpose machine tachometer gage according to claim 1 and 2, it is characterized in that described operation amplifier circuit (2) mainly is made of amplifier, the reverse input end connecting resistance R4 of described amplifier, one tunnel process resistance R 7 of the positive input of described amplifier, the other end of resistance R 7 is through resistance R 10 ground connection, connect direct supply through resistance R 9, another road of the positive input of described amplifier meets the output terminals A C OUT of amplifier through R8, an end that also is connected with resistance R 9 between resistance R 7 and resistance R 10 links to each other another termination direct supply of resistance R 9.
4. general-purpose machine tachometer gage according to claim 1, it is characterized in that between operation amplifier circuit (2) and central processing unit (3), being connected with three pin wire jumper J1, described central processing unit (3) mainly adopts 8 singlechip chip U1 to realize, the output terminals A C OUT of described operation amplifier circuit (2) connects 3 pin of described J1,2 pin of J1 connect 8 pin of U1, and 1 pin of J1 connects the direct current brushless motor speed signal output part.
5. general-purpose machine tachometer gage according to claim 1 is characterized in that described display driver circuit (4) is a led drive circuit, and described display device (5) is the digital display tube of LED.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620104360 CN2909261Y (en) | 2006-06-05 | 2006-06-05 | Universal motor tachometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620104360 CN2909261Y (en) | 2006-06-05 | 2006-06-05 | Universal motor tachometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2909261Y true CN2909261Y (en) | 2007-06-06 |
Family
ID=38128478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620104360 Expired - Fee Related CN2909261Y (en) | 2006-06-05 | 2006-06-05 | Universal motor tachometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2909261Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105181994A (en) * | 2015-10-13 | 2015-12-23 | 珠海格力电器股份有限公司 | Method and system for detecting rotating speed of direct current motor |
-
2006
- 2006-06-05 CN CN 200620104360 patent/CN2909261Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105181994A (en) * | 2015-10-13 | 2015-12-23 | 珠海格力电器股份有限公司 | Method and system for detecting rotating speed of direct current motor |
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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: 20070606 Termination date: 20100605 |