CN201858955U - Digital display caliber rule - Google Patents
Digital display caliber rule Download PDFInfo
- Publication number
- CN201858955U CN201858955U CN2010202352765U CN201020235276U CN201858955U CN 201858955 U CN201858955 U CN 201858955U CN 2010202352765 U CN2010202352765 U CN 2010202352765U CN 201020235276 U CN201020235276 U CN 201020235276U CN 201858955 U CN201858955 U CN 201858955U
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- embedded
- measuring jaw
- circuit module
- type circuit
- digital
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- Expired - Fee Related
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Abstract
The utility model discloses a digital display caliber rule, including a main scale, an embedded resistance wire, an embedded conductor, an outer measuring jaw, an inner measuring jaw, and a vernier type circuit module. The vernier type circuit module includes a fixed value resistor, a power supply, a switch, an operation amplifier, an analog-digital converter, a FPGA chip, a LED display, and a loudspeaker. When the vernier type circuit module slides on the main scale, a resistance of the resistance wire between two contacts which length is equal to an object to be measured is obtained, a voltage signal of the resistance is formed to a display control signal and a loudspeaker control signal after the operation amplifier, the analog-digital converter and the FPGA chip.
Description
Technical field
The utility model belongs to electronic technology field, relates to a kind of digital display count off slide calliper rule.
Background technology
Digital display calliper is widely used in the various manufacturings, as laboratory in colleges and universities, machine-building, auto industry, woodworking etc.Digital display calliper principle of the prior art has a variety of, as grid formula displacement transducer " vortex lattice " digital display calliper based on eddy current effect.Existing digital display calliper cost is higher, and precision is relatively poor, does not possess the count off function.
FPGA is novel programmable logic device (PLD), a large amount of logic functions can be integrated in the individual devices, it provided door number from the hundreds of door to doors up to a million, the demand for development of compliance with system chip, have advantages such as highly integrated, low-power consumption, HardwareUpgring, can satisfy different needs.Along with the continuous development of electronic technology and sensing technology, make programmable logic device (PLD) important effect of play more and more in Modern Digital System and microelectric technique are used.
Summary of the invention
The purpose of this utility model is to realize having the slide calliper rule of digital display and automatic number-sounding function.For achieving the above object, the utility model has designed resistance sensor, its voltage signal that obtains is sent into FPGA (extensive programmable integrated circuit in a kind of), output LED (a kind of display screen) display control signal and loudspeaker control signal after FPGA handles through voltage follower, analog to digital converter.
For achieving the above object, the utility model comprises: main scale, embedded resistance wire, embedded lead, outer measuring jaw, inner measuring jaw, cursor type circuit module.
Described cursor type circuit module comprises fixed value resistance, power supply, switch, operational amplifier, analog to digital converter, fpga chip, light-emitting diode display, loudspeaker.
Described fpga chip is handled the digital voltage signal of analog to digital converter output, obtains display control signal and loudspeaker control signal.
A kind of digital display count off slide calliper rule, comprise main scale (1), embedded resistance wire (2), embedded lead (3), outer measuring jaw (4) and (6), inner measuring jaw (5) and (7), cursor type circuit module (8), it is characterized in that: embedded resistance wire (2), embedded lead (3) is embedded on the main scale (1), outer measuring jaw (4), inner measuring jaw (6) is fixed on the main scale (1), the left justify of the left end of embedded resistance wire (2) and embedded metal lead (3) also links together with embedded lead, their equal in length, be fixed with outer measuring jaw (5) on the cursor type circuit module (8), inner measuring jaw (7), cursor type circuit module (8) can with outer measuring jaw (5), inner measuring jaw (7) is gone up at main scale (1) together and is slided, the left end of cursor type circuit module (8) has two contacts that are connected with internal circuit, and two contacts closely contact with embedded resistance wire (2) and embedded lead (3) respectively and constitute path.
Cursor type circuit module (8) comprises fixed value resistance (8-1), power supply (8-2), switch (8-3), operational amplifier (8-4), analog to digital converter (8-5), fpga chip (8-6), light-emitting diode display (8-7), loudspeaker (8-8), the voltage signal that obtains between (8) two contacts of cursor type circuit module is sent into Vin (+) pin of operational amplifier (8-4), the analog to digital conversion that analog to digital converter (8-5) carries out voltage is introduced in its output, the digital voltage signal of analog to digital converter (8-5) output is sent into fpga chip (8-6), digital voltage signal forms the control signal of light-emitting diode display (8-7) and the control signal of loudspeaker (8-8) after fpga chip is handled, the display control signal is sent into light-emitting diode display (8-7) and is shown the length numeral, and the loudspeaker control signal is sent into loudspeaker (8-8) and read the length numeral.
The utlity model has following advantage:
By being programmed, fpga chip finishes the output of display control signal and loudspeaker control signal.Make slide calliper rule can display digit again can reading number, simple in structure, easy to use, swift to operate, cheap, reliability is high, flexible function.
Description of drawings
Fig. 1 digital display count off slide calliper rule structural representation;
Fig. 2 digital display count off slide calliper rule resistance sensor circuit diagram;
Fig. 3 digital display count off slide calliper rule functional-block diagram.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is specified.
Referring to Fig. 1, digital display count off slide calliper rule structural representation, main scale 1 are made by insulating material, have embedded resistance wire 2 on it, and embedded metal lead 3 is fixed with outer measuring jaw 4, inner measuring jaw 6.The left end A of embedded resistance wire 2 aligns with the left end B of embedded metal lead 3 and links together with embedded lead, and their equal in length all equals AC.Cursor type circuit module 8 is also made by insulating material, is fixed with outer measuring jaw 5 on it, inner measuring jaw 7, cursor type circuit module 8 can with outer measuring jaw 5, inner measuring jaw 7 slides on main scale 1 together.The left end of cursor type circuit module 8 has two contacts that are connected with internal circuit, and two contacts closely contact with embedded resistance wire 2 and embedded metal lead 3 respectively and constitute path.
Cursor type circuit module 8 comprises fixed value resistance 8-1, power supply 8-2, switch 8-3, operational amplifier 8-4, analog to digital converter 8-5, fpga chip 8-6, light-emitting diode display 8-7, loudspeaker 8-8.
Referring to Fig. 2, digital display count off slide calliper rule resistance sensor circuit diagram, embedded resistance wire 2, fixed value resistance 8-1, power supply 8-2, switch 8-3 constitute close access.When cursor type circuit module 8, outer measuring jaw 5, inner measuring jaw 7 slide on main scale 1 together, obtain on the resistance wire 2 the resistance AD with the testee equal in length between two contacts, the voltage of AD point-to-point transmission is sent into the inside of cursor type circuit module 8.
Referring to Fig. 3, digital display count off slide calliper rule functional-block diagram is sent into Vin (+) pin of operational amplifier 8-4 to the voltage signal of AD point-to-point transmission, and the analog to digital conversion that analog to digital converter 8-5 carries out voltage is introduced in its output.Analog to digital converter 8-5 can use ADC0804, and it is 8 analog to digital converters, and measuring accuracy is 0.02V.The digital voltage signal of analog to digital converter 8-5 output is sent into fpga chip 8-6, and digital voltage signal forms the control signal of light-emitting diode display 8-7 and the control signal of loudspeaker 8-8 after fpga chip is handled.The display control signal is sent into light-emitting diode display 8-7 and is shown the length numeral, and the loudspeaker control signal is sent into loudspeaker 8-8 and read the length numeral.
In fpga chip 8-6, write VHDL (Very High Speed Integrated Circuit (VHSIC) hardware description language) program with EDA (electric design automation) tool software.Can make digital voltage signal form the control signal of light-emitting diode display 8-7 and the control signal of loudspeaker 8-8 flexibly.
Claims (2)
1. digital display count off slide calliper rule, comprise main scale (1), embedded resistance wire (2), embedded lead (3), outer measuring jaw (4) and (6), inner measuring jaw (5) and (7), cursor type circuit module (8), it is characterized in that: embedded resistance wire (2), embedded lead (3) is embedded on the main scale (1), outer measuring jaw (4), inner measuring jaw (6) is fixed on the main scale (1), the left justify of the left end of embedded resistance wire (2) and embedded metal lead (3) also links together with embedded lead, their equal in length, be fixed with outer measuring jaw (5) on the cursor type circuit module (8), inner measuring jaw (7), cursor type circuit module (8) can with outer measuring jaw (5), inner measuring jaw (7) is gone up at main scale (1) together and is slided, the left end of cursor type circuit module (8) has two contacts that are connected with internal circuit, and two contacts closely contact with embedded resistance wire (2) and embedded lead (3) respectively and constitute path.
2. digital display count off slide calliper rule according to claim 1, it is characterized in that: cursor type circuit module (8) comprises fixed value resistance (8-1), power supply (8-2), switch (8-3), operational amplifier (8-4), analog to digital converter (8-5), fpga chip (8-6), light-emitting diode display (8-7), loudspeaker (8-8), the voltage signal that obtains between (8) two contacts of cursor type circuit module is sent into Vin (+) pin of operational amplifier (8-4), the analog to digital conversion that analog to digital converter (8-5) carries out voltage is introduced in its output, the digital voltage signal of analog to digital converter (8-5) output is sent into fpga chip (8-6), digital voltage signal forms the control signal of light-emitting diode display (8-7) and the control signal of loudspeaker (8-8) after fpga chip is handled, the display control signal is sent into light-emitting diode display (8-7) and is shown the length numeral, and the loudspeaker control signal is sent into loudspeaker (8-8) and read the length numeral.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202352765U CN201858955U (en) | 2010-06-14 | 2010-06-14 | Digital display caliber rule |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202352765U CN201858955U (en) | 2010-06-14 | 2010-06-14 | Digital display caliber rule |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201858955U true CN201858955U (en) | 2011-06-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202352765U Expired - Fee Related CN201858955U (en) | 2010-06-14 | 2010-06-14 | Digital display caliber rule |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201858955U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102582323A (en) * | 2012-03-17 | 2012-07-18 | 福州大学 | Intelligent ruler |
| CN105606015A (en) * | 2015-12-22 | 2016-05-25 | 中国水产科学研究院南海水产研究所 | Hand-held shellfish body length automatic measurement device |
| WO2017028218A1 (en) * | 2015-08-18 | 2017-02-23 | 陈学良 | Caliper capable of automatic reading and use method therefor |
-
2010
- 2010-06-14 CN CN2010202352765U patent/CN201858955U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102582323A (en) * | 2012-03-17 | 2012-07-18 | 福州大学 | Intelligent ruler |
| WO2017028218A1 (en) * | 2015-08-18 | 2017-02-23 | 陈学良 | Caliper capable of automatic reading and use method therefor |
| CN105606015A (en) * | 2015-12-22 | 2016-05-25 | 中国水产科学研究院南海水产研究所 | Hand-held shellfish body length automatic measurement device |
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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: 20110608 Termination date: 20120614 |