CN105551184A - Novel portable electric power alarm with speech recognition - Google Patents
Novel portable electric power alarm with speech recognition Download PDFInfo
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- CN105551184A CN105551184A CN201510971930.6A CN201510971930A CN105551184A CN 105551184 A CN105551184 A CN 105551184A CN 201510971930 A CN201510971930 A CN 201510971930A CN 105551184 A CN105551184 A CN 105551184A
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
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- General Physics & Mathematics (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Abstract
The invention discloses a novel portable electric power alarm with speech recognition. The alarm comprises a speech recognition device used for recognizing a sound signal and transmitting sound information, a signal amplification module, a filtering module 1, a filtering module 2, an A/D module, an alarm module and a charging/ power supply module. The invention aims at realizing multifunctional operation through two parallel structures. Sensor recognition and speech recognition are realized and dangerous signals of traffic are perceived in a multiaspect mode. Therefore, the realization mode is necessary.
Description
Technical field
The present invention relates to a kind of systems design area, relating to a kind of by adopting efficient hardware circuit and chip to realize the portable power alarm with speech recognition.
Background technology
Conventional traffic detectors is on the market single, or single employing sensor detects signal of sending a car, its equipment all has a common feature, install fixing, alarm distance is short, reach is little, or adopt road maintainance machinery in early days, generally adopt large-scale comprehensive mechanical, carry out the overhaul of circuit, maintenance activity, to save manpower, raise the efficiency, guarantee traffic safety, the trend that later stage develops to Train Dispatching automation direction, namely computing center's centralized dispatching system is utilized, send code message, through wired or wireless circuit, notify construction point and forecast train time of arrival on the way, to protect, but invest too huge, be difficult to realize.
Fundamental purpose of the present invention be by sensor with know sound device bidirectionally coherent signal gather, break through the implementation pattern ossify of traditional alarm, and without the need to arranging special transmission channel, reliable and stable, with low cost, rate of false alarm is low, automaticity is higher, by environmental baseline restriction little, workmen just can carry with, easy to use.Therefore, can say that by this implementation be necessary.
Summary of the invention
In view of this, the technical problem to be solved in the present invention is to provide a kind of operation by using hardware single-chip microcomputer and the high chip of various performance to realize multifunctional railway alarm, for the problem that transport solution is reported to the police.
For reaching the effect of technique scheme, technical scheme of the present invention is:
Know sound device, being the front end of alarm, for collecting voice signal, can noise being completely cut off, send the information collected to described signal amplification module;
Signal amplification module, for being amplified by the signal collected by described knowledge sound device and reaching the magnitude of voltage required by single-chip microcomputer, have employed several groups of mutually non-interfering operational amplifiers, and to source and the suitable filtering of output terminal;
Voltage hoisting module, comprises low noise high speed operation amplifier, employing be the connection of analog adder, formula is: U
0=0.7 (U
i+ 7), by pin ground connection, simplify circuit, ensure that voltage promotes;
Filtration module 1 is low-pass filter, is the elimination of fc with a cutoff frequency, first will eliminate mixed filter signal low-pass filtering frequently, and filter by unwanted radio-frequency component, then Bian sample frequency is improved, finally carry out again sampling and data processing;
Sensor assembly, the signal on perception track circuit, and synchronously the signal on track circuit is input to described filtration module 2;
Filtration module 2, adopt the active filter in bandpass filter, be extruded with the component of signal with work frequency, and the undesired signal of frequency beyond power frequency and noise are suppressed, thus the signal obtained based on work frequency, for carrying out filtering to the signal on track circuit, noise component in filter out signal, thus the anti-interference energy improving system;
A/D module, carries out amplitude limit by filtered signal, carries out A/D conversion, converts simulating signal to digital signal;
One-chip computer module, signal sends into single-chip microcomputer after pre-process, for all digital signal processing such as identification computing of voice signal, and according to specifically analyzing determination methods, carrying out FFT calculating, differentiating Train Approaching process;
Alarm module, comprise voice module, the design of sound circuit is playback after first recording, and not needing amplifies word from loudspeaker at any time plays back, under not needing loop playback to be operated in direct mode operation, by FT pin ground connection, make it invalid, adopt the loop playback pattern of ISD1829 in playback circuit, namely once playback, then carry out loop play, have and stop in the event of a power failure playing;
Charging/power module, charging circuit can charge for colloid battery, and simultaneously in order to avoid too charging, devise overvoltage protection control circuit, namely when cell voltage reaches 8.5V, circuit automatically detects this voltage and cuts off charge circuit.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of portable power railway warming equipment with speech recognition of the present invention.
Embodiment
In order to make technical matters to be solved by this invention, technical scheme and beneficial effect clearly understand, below in conjunction with drawings and Examples, the present invention will be described in detail.It should be noted that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention, the product that can realize said function belongs to equivalent to be replaced and improves, and is all included within protection scope of the present invention.Concrete grammar is as follows:
Embodiment one:
As shown in Figure 1: embodiment one, according to the embodiment of the present invention, provides a kind of novel portable power railway warming equipment with speech recognition, this invention be suitable for railway, highway and etc. some specific transportation applications, comprising:
Know sound device, face, signals collecting hole uses magnetic material, and can be adsorbed on the side of rail when Bian collection voice signal, all the other faces are light material sealing surface, for isolated voice signal around.Such design can collect comparatively clean train wheel track sound, decreases the operational analysis amount of system;
Signal amplification module, quiescent point is when input signal is zero, the value of the base current, collector current etc. of components and parts internal transistor, makes because supply voltage is too high circuit create saturation distortion, and goes out reason by oscillograph observation and analysis in debug process.The use of slide rheostat R73 can 5K potentiometer.Electric capacity C14 and C16 plays important effect in filtering, reduces the noise of whole circuit, and signal is amplified the use for next step;
Voltage hoisting module, distortionless voice emplifying signal, can not include negative voltage in the voltage of input, therefore must carry out voltage lifting and make voltage reach the unipolarity of 0 one 5V, to meet the requirement of A/D conversion before signal voltage sends into single-chip microcomputer;
Filtration module 1, the acoustic constituents of train wheel track concentrates on 3000Hz, also voice signal is there is in high-frequency, and the white noise brought when there is sampling at higher frequency place, sampling thheorem must be met time signal is sampled, frequency must be equal to or higher than the signal highest frequency of twice, but generally can adopt the sample frequency of 3-4 times in real engineering, if signal does not meet sampling thheorem when adopting, frequency aliasing can be produced now also referred to as signal aliasing phenomenon, eliminate aliasing and carry out filtering;
Sensor assembly, the signal on the track circuit of collection, from Beijing-Shanghai Railway Hebei Section, in order to make the signal of collection have ubiquity, has all carried out multi collect to the signal on the track uplink and downlink circuit of electric propulsion train.Track circuit is the AC track circuit of electric propulsion section, for the continuous exchange of track circuit of work frequency 50Hz power supply, sample set of frequency is 1100Hz, enlargement factor is set to 2, number of channels is set to single channel, the front end of sensor is the Fe-Nd-B of the magnetic material object with oblique tread, it can be adsorbed on tiltedly setting foot on of rail, can fully track-circuit signalling be introduced in the middle of alarm like this.The rear end of sensor is a metal coating shell, the metallic conduction loop construction of built-in 100 circles of betal can, coil appears two taps from metal coating shell, one end directly connects the ground end of acquisition system, another end is drawn from the rear end of metal coating shell, betal can plays not only can protect metallic conduction coil, and can combine closely with magnetic material;
Filtration module 2, A/D converter, carries out filtering to the signal of having sampled, and extracts the signal needed, and simulating signal is carried out A/D converts digital signal to;
One-chip computer module, powering on of system, after single-chip microcomputer powers on and stablizes, load relevant startup item, the port that signal sends into single-chip microcomputer after pre-amplification circuit and pre-process circuit carries out A/D conversion, carries out initialization to A/D functional module, carry out after initialization and system stability sampling and A/D changes, by result stored in data buffer, the threshold values that the data of read data buffer carry out short-time energy compares, and makes pre-judgement.Judge whether, enter next step computing, data are carried out FFT calculating, and frequency range is judged."Yes" is then carried out next step and is calculated, otherwise abandons data, obtains cepstrum, ask MFCC coefficient and compare with template, then report to the police in determination range by cepstrum the data reaching template frequency range computing of taking the logarithm;
Alarm module, "ON" is machine operation, and whether closely measure train at any time, "Off" is that machine quits work;
Pilot lamp: the pilot lamp time pilot lamp of front panel is machine operation, when machine is just at operation, pilot lamp can be bright; The pilot lamp of rear panel is charging indicator light, when light yellow time, represent that machine charges this moment;
Charging/power module, relay J obtains electric, makes its adhesive.The closed-loop path be made up of resistance, relay and triode, makes triode operation, turn-on transistor.When just powering on, the base stage of triode and its emitter voltage are 0V, thus triode V1 ends.When just having started to charge, the voltage of colloid storage battery is very low, and stabilivolt ends.When AN presses, relay adhesive, source-side switches closes, and now source-side switches is in self-locking state.Because the state of source-side switches is only determined by relay, have nothing to do with button AN.So when unclamping AN, source-side switches is still in self-locking state, can continue as transformer T and provide 220V AC power.In charging circuit, after AN being unclamped to battery E charging after rectification, source-side switches self-locking, start to charge to colloid storage battery E, along with the carrying out of charging process, two voltages of colloid storage battery constantly raise, when reaching the ultimate value 7.5V of stabilivolt, stabilivolt punctures, now triode V1 saturation conduction, the collector voltage of triode equals emitter voltage, is namely equivalent to grounded collector, base voltage now is also 0V, V2 cut-off.Triode V2 in figure is just as a contactor, and when turned off, disconnect as switch, control circuit will be opened a way, then relay J will discharge, thus source-side switches is disconnected.When source-side switches is off state, transformer T just quits work, and finally stops colloid storage battery charging, thus protects colloid storage battery, avoid the infringement of overcharge to colloid storage battery
Embodiment two
Know sound device, face, signals collecting hole uses magnetic material, and can be adsorbed on the side of rail when Bian collection voice signal, all the other faces are light material sealing surface, for isolated voice signal around.Such design can collect comparatively clean train wheel track sound, decreases the operational analysis amount of system;
Signal amplification module, quiescent point is when input signal is zero, the value of the base current, collector current etc. of components and parts internal transistor, in debug process, make circuit create saturation distortion because supply voltage is too high, and go out reason by oscillograph observation and analysis, signal is amplified the use for next step;
Voltage hoisting module, distortionless voice emplifying signal, can not include negative voltage in the voltage of input, therefore must carry out voltage lifting and make voltage reach the unipolarity of 0 one 5V, to meet the requirement of A/D conversion before signal voltage sends into single-chip microcomputer;
Filtration module 1, must sampling thheorem be met time signal is sampled, if do not meet sampling thheorem when signal adopts, frequency aliasing can be produced now also referred to as signal aliasing phenomenon, eliminate aliasing and carry out filtering; Sensor assembly, the signal on the high-speed railway circuit of collection, from Beijing-Shanghai section, in order to make the signal of collection have ubiquity, has all carried out multi collect to the signal on the track uplink and downlink circuit of electric propulsion train;
Filtration module 2, A/D converter, carries out filtering to the signal of having sampled, and extracts the signal needed, and simulating signal is carried out A/D converts digital signal to;
One-chip computer module, powering on of system, after single-chip microcomputer powers on and stablizes, load relevant startup item, the port that signal sends into single-chip microcomputer after pre-amplification circuit and pre-process circuit carries out A/D conversion, carries out initialization to A/D functional module, carry out after initialization and system stability sampling and A/D changes, by result stored in data buffer, the threshold values that the data of read data buffer carry out short-time energy compares, and makes pre-judgement.Judge whether, enter next step computing, data are carried out FFT calculating, and frequency range is judged."Yes" is then carried out next step and is calculated, otherwise abandons data, obtains cepstrum, ask MFCC coefficient and compare with template, then report to the police in determination range by cepstrum the data reaching template frequency range computing of taking the logarithm;
Alarm module, "ON" is machine operation, and whether closely measure train at any time, "Off" is that machine quits work;
Pilot lamp: the pilot lamp time pilot lamp of front panel is machine operation, when machine is just at operation, pilot lamp can be bright; The pilot lamp of rear panel is charging indicator light, when light yellow time, represent that machine charges this moment.
Useful achievement of the present invention is, the hardware design of Portable approach alarm for electric traction train, Software for Design and system testing part.Hardware aspect, design and implimentation filtering circuit, amplitude limiter circuit, the circuit such as battery charger, the main root in Software for Design aspect has this conclusion of important relation for according to proposing decision condition to Train Approaching with the change of work frequency 50Hz component of signal in the signal on track circuit and Train Approaching, propose to judge finally, to sum up alarm of the present invention according to the use result of alarm and there is the advantages such as protection distance length, standby time to the signal on track circuit from time domain and frequency domain.
Claims (1)
1. a novel portable power alarm with speech recognition, is characterized in that:
Know sound device, being the front end of alarm, for collecting voice signal, can noise being completely cut off, send the information collected to described signal amplification module;
Signal amplification module, for being amplified by the signal collected by described knowledge sound device and reaching the magnitude of voltage required by single-chip microcomputer, have employed several groups of mutually non-interfering operational amplifiers, and to source and the suitable filtering of output terminal;
Voltage hoisting module, comprises low noise high speed operation amplifier, employing be the connection of analog adder, formula is: U
0=0.7 (U
i+ 7), by pin ground connection, simplify circuit, ensure that voltage promotes;
Filtration module 1 is low-pass filter, is the elimination of fc with a cutoff frequency, first will eliminate mixed filter signal low-pass filtering frequently, and filter by unwanted radio-frequency component, then Bian sample frequency is improved, finally carry out again sampling and data processing;
Sensor assembly, the signal on perception track circuit, and synchronously the signal on track circuit is input to described filtration module 2;
Filtration module 2, adopt the active filter in bandpass filter, be extruded with the component of signal with work frequency, and the undesired signal of frequency beyond power frequency and noise are suppressed, thus the signal obtained based on work frequency, for carrying out filtering to the signal on track circuit, noise component in filter out signal, thus the anti-interference energy improving system;
A/D module, carries out amplitude limit by filtered signal, carries out A/D conversion, converts simulating signal to digital signal;
One-chip computer module, signal sends into single-chip microcomputer after pre-process, for all digital signal processing such as identification computing of voice signal, and according to specifically analyzing determination methods, carrying out FFT calculating, differentiating Train Approaching process;
Alarm module, comprise voice module, the design of sound circuit is playback after first recording, and not needing amplifies word from loudspeaker at any time plays back, under not needing loop playback to be operated in direct mode operation, by FT pin ground connection, make it invalid, adopt the loop playback pattern of ISD1829 in playback circuit, namely once playback, then carry out loop play, have and stop in the event of a power failure playing;
Charging/power module, charging circuit can charge for colloid battery, and simultaneously in order to avoid too charging, devise overvoltage protection control circuit, namely when cell voltage reaches 8.5V, circuit automatically detects this voltage and cuts off charge circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510971930.6A CN105551184A (en) | 2015-12-19 | 2015-12-19 | Novel portable electric power alarm with speech recognition |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510971930.6A CN105551184A (en) | 2015-12-19 | 2015-12-19 | Novel portable electric power alarm with speech recognition |
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| CN105551184A true CN105551184A (en) | 2016-05-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105835908A (en) * | 2016-05-30 | 2016-08-10 | 上海铁路局合肥机务段 | Train approach warning device |
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| US20140300455A1 (en) * | 2011-07-27 | 2014-10-09 | Toyota Jidosha Kabushiki Kaisha | Vehicle approach warning apparatus |
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Patent Citations (5)
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| CN1095676A (en) * | 1993-05-21 | 1994-11-30 | 武汉铁路分局电子计算技术中心 | Track circuit train spacing point discriminating gear and adopt its locomotive operation monitor logger |
| CN1887621A (en) * | 2006-07-21 | 2007-01-03 | 凌子龙 | Alarm sending method and alarm system for automobile |
| CN201170916Y (en) * | 2008-02-29 | 2008-12-24 | 王德文 | Portable alarm for protection of adjacence vehicle |
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| US20140300455A1 (en) * | 2011-07-27 | 2014-10-09 | Toyota Jidosha Kabushiki Kaisha | Vehicle approach warning apparatus |
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| 何帅: ""基于声音识别铁路专用便携式报警器的研制"", 《中国优秀硕士学位论文全文数据库 信息科技辑》 * |
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| CN105835908A (en) * | 2016-05-30 | 2016-08-10 | 上海铁路局合肥机务段 | Train approach warning device |
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Application publication date: 20160504 |