CN207379982U - A kind of high-precision step loss detection device based on ultrasonic sensor - Google Patents
A kind of high-precision step loss detection device based on ultrasonic sensor Download PDFInfo
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- CN207379982U CN207379982U CN201721584877.5U CN201721584877U CN207379982U CN 207379982 U CN207379982 U CN 207379982U CN 201721584877 U CN201721584877 U CN 201721584877U CN 207379982 U CN207379982 U CN 207379982U
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Abstract
The utility model discloses a kind of high-precision step loss detection devices based on ultrasonic sensor, are related to ultrasound examination step and lose device field；It includes ultrasonic sensor, for emitting and receiving ejected wave；Ultrasonic measurement circuit, for measuring and handling ultrasonic wave signal；Ultrasonic transmission conversion circuit for ultrasonic wave signal to be converted to rs 232 serial interface signal, will carry out anti-interference and isolation processing and be transmitted to microcontroller after its analog-to-digital conversion；Microcontroller, for receive signal laggard line-spacing discrete time calculate and judge time difference size complete step loss detection；The utility model solves the problems, such as existing detection device poor anti-interference, using the diffusing reflection principle of ultrasonic wave mating staircase and detection device is needed to cause poor practicability, has achieved the effect that the anti-interference and precision that improve step loss detection device.
Description
Technical field
The utility model is related to ultrasound examination steps to lose device field, especially a kind of based on ultrasonic sensor
High-precision step loss detection device.
Background technology
When staircase is in the process of operation, due to the use of artificial or long-term step, some step moment is caused to be dropped, is gone out
Showed the dangerous situation in elevator cavity, then just need equipment correspond to this miss step cavity carry out in time detection to avoid
The generation of security incident, the step loss of staircase have great influence, but existing ultrasound at present for the operational safety of staircase
Ripple utilizes its infrared diffusing reflection using most of field, and accepted standard distance and staircase length requirement detection device and staircase are matched somebody with somebody
Set, poor practicability, flexibility are low, it is impossible to meet staircase present situation；On the other hand the device being monitored using close switch is because of inspection
It is more to survey environment iron content, interference greatly causes measurement result unreliable；So a kind of measuring device is needed according to different staircases
Calculate the accurate detection that beeline carries out step loss.
Utility model content
The purpose of this utility model is that：The utility model provides a kind of high-precision step based on ultrasonic sensor
Loss detection device, solve existing detection device poor anti-interference, needed using the diffusing reflection principle of ultrasonic wave mating staircase and
Detection device causes the problem of poor practicability.
The technical solution adopted in the utility model is as follows：
A kind of high-precision step loss detection device based on ultrasonic sensor, including
Ultrasonic sensor, for emitting and receiving ejected wave；
Ultrasonic measurement circuit, for measuring and handling ultrasonic wave signal；
Ultrasonic transmission conversion circuit, for ultrasonic wave signal to be converted to rs 232 serial interface signal, after its analog-to-digital conversion
It carries out anti-interference and isolation processing and is transmitted to microcontroller；
Microcontroller, for receive signal laggard line-spacing discrete time calculate and judge time difference size complete step lose inspection
It surveys.
Preferably, the ultrasonic measurement circuit includes probe, filter circuit and signal processing chip；The probe, filter
Wave circuit and signal processing chip are sequentially electrically connected, and probe LS1 both ends connect respectively with signal processing chip pin TDO, TCK
It connecing, one end is connected power supply with via resistance R86, and other end connection resistance R85 is connected to the ground to the power supply way of escape via capacitance C88,
Probe LS2 both ends are connected respectively with signal processing chip pin MSEL1, nCEO, and probe LS2 one end is sequentially connected with capacitance C81, electricity
It is grounded, is also connected with after capacitance C82 and resistance R87 to capacitance C78, the nCONFIG of signal processing chip after resistance R84 and capacitance C78
It is connected respectively with ultrasound signal transmission conversion circuit with CLKL_FB1p pins.
Preferably, the ultrasonic transmission conversion circuit includes waveform-serial ports conversion chip, AD conversion unit and signal
Isolating chip, the waveform-serial ports conversion chip, AD conversion unit and signal isolation chip are sequentially electrically connected；Waveform-string
Pin 1, pin 2 and the pin 3 of mouth conversion chip are connected to VDD, and pin 4, pin 5 and pin 6 are grounded, the connection letter of pin 7
The pin 8 of number isolating chip, is also connected with resistance R42 to VDD, and pin 9 connects the pin 7 of signal isolation chip, is also connected with resistance
For R43 to the pin 8 of signal isolation chip, the pin 10 of waveform-serial ports conversion chip connects the pin 6 of signal isolation chip, ripple
The pin 8 of shape-serial ports conversion chip connects signal isolation chip pin 5, also drawing via resistance R44 connection signal isolation chips
Foot 6；The pin 4 of signal isolation chip is grounded, and pin 1 meets VDD, pin 3 and pin 2 connect respectively microcontroller pin TX and
RX。
Preferably, the microcontroller is using STM32 series.
In conclusion by adopting the above-described technical solution, the beneficial effects of the utility model are：
1. the utility model passes through ultrasonic sensor, ultrasonic measurement circuit, ultrasonic transmission conversion circuit and monolithic
Machine connection is realized to send to calculate to microcontroller into row distance by processing by ultrasonic signal judges whether step is lost with the time difference,
Avoid it is existing using diffusing reflection or close to switch poor practicability, anti-interference is poor the shortcomings that, without consider staircase and detection fill
It whether mating puts, further improves the practicability of missing step detection device of escalator, reached raising step loss detection dress
The anti-interference and the effect of precision put；
2. the utility model is filtered when measuring ultrasonic signal, the interference such as removal ripple, in transmission signal to list
The stability that isolation ensure that signal is carried out during piece machine, further improves the precision of measurement；
3. the microcontroller of the utility model further improves detection device using STM32 series is at low cost, performance is stablized
Practicability and anti-interference.
Description of the drawings
The utility model will illustrate by example and with reference to the appended drawing, wherein：
Fig. 1 is the system block diagram of the utility model；
Fig. 2 is the ultrasonic measurement circuit diagram of the utility model；
Fig. 3 is the ultrasound signal transmission conversion circuit figure of the utility model；
Fig. 4 is the microcontroller schematic diagram of the utility model.
Specific embodiment
All features or disclosed all methods disclosed in this specification or in the process the step of, except mutually exclusive
Feature and/or step beyond, can combine in any way.
It elaborates with reference to Fig. 1-4 pairs of the utility model.
Embodiment 1
A kind of high-precision step loss detection device based on ultrasonic sensor, including
Ultrasonic sensor, for emitting and receiving ejected wave；
Ultrasonic measurement circuit, for measuring and handling ultrasonic wave signal；
Ultrasonic transmission conversion circuit, for ultrasonic wave signal to be converted to rs 232 serial interface signal, after its analog-to-digital conversion
It carries out anti-interference and isolation processing and is transmitted to microcontroller；
Microcontroller, for receive signal laggard line-spacing discrete time calculate and judge time difference size complete step lose inspection
It surveys.
Embodiment 2
Microcontroller is measured and handled using STM32 series, ultrasonic sensor transmitting and reception ejected wave, measuring circuit
Afterwards microcontroller is transmitted a signal to after the laggard traveling wave shape of connection transmission conversion circuit-serial ports conversion, analog-to-digital conversion and signal isolation
Pin, when microcontroller calculates that step distance between axles, most short step distance between axles, fiducial time difference calculate, the time difference calculates and judges
Between poor size, if the time difference, to be more than fiducial time poor, be judged as that step is lost because a step corresponds to a step axle,
Next step axle cannot be detected on time if losing, so the time difference can be more than, fiducial time is poor, and the present apparatus is suitable for institute
There is staircase, most short axle spacing is detected so as to carry out the judgement of step loss for different staircases, popularity is good, and precision is high；
Circuit carries out anti-interference process simultaneously：Ultrasonic measurement circuit includes probe, filter circuit and signal processing chip；The spy
Head, filter circuit and signal processing chip are sequentially electrically connected, probe LS1 both ends respectively with signal processing chip pin TDO,
TCK connections, one end are connected power supply with via resistance R86, and the other end connects resistance R85 to the power supply way of escape via capacitance C88 connections
To ground, probe LS2 both ends are connected respectively with signal processing chip pin MSEL1, nCEO, and probe LS2 one end is sequentially connected with capacitance
It is grounded, is also connected with after capacitance C82 and resistance R87 to capacitance C78 after C81, resistance R84 and capacitance C78, signal processing chip
NCONFIG and CLKL_FB1p pins are connected respectively with ultrasound signal transmission conversion circuit.Ultrasonic transmission conversion circuit includes
Waveform-serial ports conversion chip, AD conversion unit and signal isolation chip, the waveform-serial ports conversion chip, analog-to-digital conversion list
Member and signal isolation chip are sequentially electrically connected；Pin 1, pin 2 and the pin 3 of waveform-serial ports conversion chip are connected to
VDD, pin 4, pin 5 and pin 6 are grounded, and pin 7 connects the pin 8 of signal isolation chip, is also connected with resistance R42 to VDD, draws
Foot 9 connects the pin 7 of signal isolation chip, is also connected with resistance R43 to the pin 8 of signal isolation chip, waveform-serial ports conversion core
The pin 10 of piece connects the pin 6 of signal isolation chip, and the pin 8 of waveform-serial ports conversion chip connects signal isolation chip and draws
Foot 5, also via the pin 6 of resistance R44 connection signal isolation chips；The pin 4 of signal isolation chip is grounded, and pin 1 meets VDD,
Pin 3 and pin 2 connect the pin TX and RX of microcontroller respectively；By anti-interference and isolation processing removal ripple etc., strengthen letter
Number stability, so as to improve the precision of detection；The utility model passes through ultrasonic sensor, ultrasonic measurement circuit, ultrasound
Ripple transmission conversion circuit connect with microcontroller realization by ultrasonic signal by processing send to microcontroller into row distance calculating and when
Between difference judge whether step is lost, avoid it is existing using diffusing reflection or close to switch poor practicability, anti-interference is poor the shortcomings that,
Without considering whether staircase and detection device are mating, further improve the practicability of missing step detection device of escalator, reach
Improve the anti-interference of step loss detection device and the effect of precision.
Claims (4)
1. a kind of high-precision step loss detection device based on ultrasonic sensor, it is characterised in that：Including
Ultrasonic sensor, for emitting and receiving ejected wave；
Ultrasonic measurement circuit, for measuring and handling ultrasonic wave signal；
Ultrasonic transmission conversion circuit for ultrasonic wave signal to be converted to rs 232 serial interface signal, will carry out after its analog-to-digital conversion
Anti-interference and isolation processing is simultaneously transmitted to microcontroller；
Microcontroller, for receive signal laggard line-spacing discrete time calculate and judge time difference size complete step loss detection.
2. a kind of high-precision step loss detection device based on ultrasonic sensor according to claim 1, feature
It is：The ultrasonic measurement circuit includes probe, filter circuit and signal processing chip；The probe, filter circuit and letter
Number processing chip is sequentially electrically connected, and probe LS1 both ends be connecteds respectively with signal processing chip pin TDO, TCK, and one end is with passing through
By resistance R86 connection power supplys, other end connection resistance R85 is connected to the ground to the power supply way of escape via capacitance C88, probe LS2 both ends
It is connected respectively with signal processing chip pin MSEL1, nCEO, probe LS2 one end is sequentially connected with capacitance C81, resistance R84 and capacitance
It is grounded, is also connected with after capacitance C82 and resistance R87 to capacitance C78, the nCONFIG and CLKL_FB1p of signal processing chip after C78
Pin is connected respectively with ultrasound signal transmission conversion circuit.
3. a kind of high-precision step loss detection device based on ultrasonic sensor according to claim 2, feature
It is：The ultrasonic transmission conversion circuit includes waveform-serial ports conversion chip, AD conversion unit and signal isolation chip,
Waveform-the serial ports conversion chip, AD conversion unit and signal isolation chip are sequentially electrically connected；Waveform-serial ports conversion core
Pin 1, pin 2 and the pin 3 of piece are connected to VDD, and pin 4, pin 5 and pin 6 are grounded, and pin 7 connects signal isolation core
The pin 8 of piece, is also connected with resistance R42 to VDD, and pin 9 connects the pin 7 of signal isolation chip, is also connected with resistance R43 to signal
The pin 8 of isolating chip, the pin 10 of waveform-serial ports conversion chip connect the pin 6 of signal isolation chip, and waveform-serial ports turns
The pin 8 for changing chip connects signal isolation chip pin 5, also via the pin 6 of resistance R44 connection signal isolation chips；Signal
The pin 4 of isolating chip is grounded, and pin 1 meets VDD, and pin 3 and pin 2 connect the pin TX and RX of microcontroller respectively.
4. a kind of high-precision step loss detection device based on ultrasonic sensor according to claim 3, feature
It is：The microcontroller is using STM32 series.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721584877.5U CN207379982U (en) | 2017-11-23 | 2017-11-23 | A kind of high-precision step loss detection device based on ultrasonic sensor |
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| CN201721584877.5U CN207379982U (en) | 2017-11-23 | 2017-11-23 | A kind of high-precision step loss detection device based on ultrasonic sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108100843A (en) * | 2017-11-23 | 2018-06-01 | 中景恒基云端物联网科技成都有限公司 | A kind of high-precision step loss detection method and device based on ultrasonic sensor |
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2017
- 2017-11-23 CN CN201721584877.5U patent/CN207379982U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108100843A (en) * | 2017-11-23 | 2018-06-01 | 中景恒基云端物联网科技成都有限公司 | A kind of high-precision step loss detection method and device based on ultrasonic sensor |
| CN108100843B (en) * | 2017-11-23 | 2020-08-25 | 中景恒基云端物联网科技成都有限公司 | High-precision step loss detection method and device based on ultrasonic sensor |
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