CN105445739A - CPLD-based ultrasonic range finder - Google Patents
CPLD-based ultrasonic range finder Download PDFInfo
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- CN105445739A CN105445739A CN201410489369.3A CN201410489369A CN105445739A CN 105445739 A CN105445739 A CN 105445739A CN 201410489369 A CN201410489369 A CN 201410489369A CN 105445739 A CN105445739 A CN 105445739A
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- circuit
- cpld
- ultrasonic
- range finder
- ultrasonic range
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- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
The invention discloses a CPLD-based ultrasonic range finder, which has the advantages of being convenient in use, installation and maintenance, reliable in operation, low in cost, wide in application range, high in measuring accuracy, high in environmental adaptability and the like. The CPLD-based ultrasonic range finder comprises an ultrasonic transmitting circuit, an ultrasonic receiving circuit, an error automatic correcting circuit, a CPLD circuit and a liquid crystal display circuit. The structural features of the CPLD-based ultrasonic range finder are that the ultrasonic transmitting circuit and the ultrasonic receiving circuit are arranged at long distance from an obstacle, the ultrasonic transmitting circuit transmits a transmitting signal to the obstacle, the obstacle reflects the signal back to the ultrasonic receiving circuit, the arranged CPLD circuit receives the signal for calculation processing, the CPLD circuit is connected with the arranged display circuit, the calculated data is displayed by the display circuit, and the arranged error automatic correcting circuit is connected with the display circuit.
Description
Technical field
The present invention is the device being applied to measuring distance, relates to a kind of ultrasonic range finder based on CPLD particularly.
Background technology
Ultrasound is long, range finding, displacement have very long history, its advantage be easy to directional transmissions, good directionality, intensity easy to control, do not need directly to contact with object being measured.
No matter abroad or the domestic theory of ultrasonic ranging that utilizes is very ripe, internal and overseas is compared, and measuring accuracy also has some gaps.The precision of external ultrasonic ranging can reach 1cm or 1% at present, and domestic precision of ultrasonic ranging can only reach 2cm or 1.5% at present.Affect the factor of precision except the manufacture craft of ultrasonic sensor itself, also have the inharmonic reason of sequential control of ultrasound wave transmitting and receiving circuit and main control module.
At present, on market most ultrasonic be all adopt traditional single-chip microcomputer as main control unit to carry out the exploitation of system than range measurement system, along with people are to the proposition of the understanding and solution that cause measuring error factor, further developing of electronic technology and Based Intelligent Control, needing ultrasonic ranging system to have has powerful control ability to higher clock frequency with to sequential.
Summary of the invention
The present invention is exactly for the problems referred to above, makes up the deficiencies in the prior art, provides a kind of ultrasonic range finder based on CPLD, the present invention has use, installation, easy to maintenance, reliable operation, and production cost is low, have wide range of applications, and it is high to have measuring accuracy, the features such as environmental suitability is strong.
For realizing above-mentioned purpose of the present invention, the present invention adopts following technical scheme.
A kind of ultrasonic range finder based on CPLD of the present invention, comprising ultrasonic transmit circuit, ultrasound wave receiving circuit, automatic error correction circuit, CPLD circuit, liquid crystal display circuit five partial circuit, its structural feature is: distance barrier distant location arranges ultrasonic transmit circuit and ultrasound wave receiving circuit, to be sent to barrier by ultrasonic transmit circuit and transmit, be reflected back by barrier again and send ultrasound wave receiving circuit to, computing is carried out again by the CPLD circuit Received signal strength arranged, CPLD circuit is connected with the display circuit of setting, the data calculated demonstrate result by display circuit, step-up error automatic calibration circuit is connected with display circuit simultaneously.
As a preferred embodiment of the present invention, the compiling of described CPLD circuit module adopts VHDL language, uses VHDL, not only can describe fast, also have many powerful performances; The nucleus module of CPLD chip internal exploitation comprises synchronous counter, add subtract counter and register.
Further, synchronous counter of the present invention is synchronous binary counter.
Further, add subtract counter of the present invention adds plus-minus counting selecting side in steering logic, can draw 12 add subtract counters.
The invention has the beneficial effects as follows.
A kind of ultrasonic range finder based on CPLD of the present invention improves 1 ~ 2 order of magnitude in the key technical indexes such as output frequency, resolution, multiplicity, degree of accuracy than range measurement system in the market, can widen the application of ultrasonic ranging widely; In addition, use, install, easy to maintenance, reliable operation, the features such as production cost is low, has wide range of applications, and it is high to have measuring accuracy, and environmental suitability is strong.
Accompanying drawing explanation
Fig. 1 is the system construction drawing of a kind of ultrasonic range finder based on CPLD of the present invention.
Embodiment
As shown in Figure 1, be the system construction drawing of a kind of ultrasonic range finder based on CPLD of the present invention.Figure comprises ultrasonic transmit circuit, ultrasound wave receiving circuit, automatic error correction circuit, CPLD circuit, liquid crystal display circuit five partial circuit, distance barrier distant location arranges ultrasonic transmit circuit and ultrasound wave receiving circuit, to be sent to barrier by ultrasonic transmit circuit and transmit, be reflected back by barrier again and send ultrasound wave receiving circuit to, computing is carried out again by the CPLD circuit Received signal strength arranged, CPLD circuit is connected with the display circuit of setting, the data calculated demonstrate result by display circuit, step-up error automatic calibration circuit is connected with display circuit simultaneously.
The compiling of described CPLD circuit module adopts VHDL language, uses VHDL, not only can describe fast, also have many powerful performances; The nucleus module of CPLD chip internal exploitation comprises synchronous counter, add subtract counter and register.Synchronous counter of the present invention is synchronous binary counter; Add subtract counter of the present invention adds plus-minus counting selecting side in steering logic, can draw 12 add subtract counters.
Claims (4)
1. based on a ultrasonic range finder of CPLD, comprising ultrasonic transmit circuit, ultrasound wave receiving circuit, automatic error correction circuit, CPLD circuit, liquid crystal display circuit five partial circuit; It is characterized in that: distance barrier distant location arranges ultrasonic transmit circuit and ultrasound wave receiving circuit, to be sent to barrier by ultrasonic transmit circuit and transmit, be reflected back by barrier again and send ultrasound wave receiving circuit to, computing is carried out again by the CPLD circuit Received signal strength arranged, CPLD circuit is connected with the display circuit of setting, the data calculated demonstrate result by display circuit, and step-up error automatic calibration circuit is connected with display circuit simultaneously.
2. a kind of ultrasonic range finder based on CPLD according to claim 1, is characterized in that: the compiling of described CPLD circuit module adopts VHDL language, and the nucleus module of CPLD chip internal exploitation comprises synchronous counter, add subtract counter and register.
3. a kind of ultrasonic range finder based on CPLD according to claim 2, is characterized in that: described synchronous counter is synchronous binary counter.
4. a kind of ultrasonic range finder based on CPLD according to claim 2, is characterized in that: described add subtract counter adds plus-minus counting selecting side in steering logic, can draw 12 add subtract counters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410489369.3A CN105445739A (en) | 2014-09-24 | 2014-09-24 | CPLD-based ultrasonic range finder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410489369.3A CN105445739A (en) | 2014-09-24 | 2014-09-24 | CPLD-based ultrasonic range finder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105445739A true CN105445739A (en) | 2016-03-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410489369.3A Pending CN105445739A (en) | 2014-09-24 | 2014-09-24 | CPLD-based ultrasonic range finder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105445739A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110310416A (en) * | 2018-03-20 | 2019-10-08 | 上海雨展网络科技有限公司 | A kind of unmanned cargo path shipment detection method based on ultrasound |
-
2014
- 2014-09-24 CN CN201410489369.3A patent/CN105445739A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110310416A (en) * | 2018-03-20 | 2019-10-08 | 上海雨展网络科技有限公司 | A kind of unmanned cargo path shipment detection method based on ultrasound |
| CN110310416B (en) * | 2018-03-20 | 2021-09-28 | 上海雨展网络科技有限公司 | Unmanned cargo channel shipment detection method based on ultrasonic waves |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160330 |
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| WD01 | Invention patent application deemed withdrawn after publication |