CN2870076Y

CN2870076Y - Self-adoptive intelligent electronic horn

Info

Publication number: CN2870076Y
Application number: CN 200520036967
Authority: CN
Inventors: 赵宏伟
Original assignee: GUTAI ELECTRONIC Co Ltd HARBIN UNIV OF TECHNOLOGY
Current assignee: GUTAI ELECTRONIC Co Ltd HARBIN UNIV OF TECHNOLOGY
Priority date: 2005-12-30
Filing date: 2005-12-30
Publication date: 2007-02-14
Anticipated expiration: 2015-12-30

Abstract

This utility model discloses an automatic smart electric horn, an electric circuit frequency for said horn and wave are changed with environment, sound level of horn will not fall. This utility model comprises a machinery sound producing device 1, an electromagnetic coil 2, a driving circuit 3, an oscillating circuit 3, this device is characterized in that said machinery sound device 1 and oscillating circuit 4 is connected by a sensor with sensing sound device with vibration frequency 5. A voltage control make break ratio regulation circuit 6 and 7 are connected with an oscillating circuit 4; the oscillating frequency and waveform used for control oscillating circuit 4; said sensor 5 is sound wave sensor or a vibration sensor or a magnetic sensor and the oscillating frequency used for control oscillating circuit 4 circuit near machinery sound. Said voltage control ration circuit 6 and temperature control make break ratio 7 and oscillating puls width used for control oscillating circuit 7.

Description

A kind of adaptive intelligent electronic horn

Technical field:

The utility model is a kind of electronic sound-producing device, specifically a kind of electronic horn.

Technical background:

At present automobile horn is divided into two kinds of mechanical horn and electronic horns.Mechanical horn has certain environmental suitability, promptly when changes in environmental conditions (temperature, air pressure etc.), also can send the more stable caution sound of sound level, the break-make ratio of mechanical horn contact is generally about 2: 1, remain unchanged in the course of work, thereby sound effect is good.But the mechanical contact life-span of mechanical horn inside is very short, poor durability.Though the electronic horn life-span is longer, follow-up capability is relatively poor, and when environment change, the mechanical property of loudspeaker changes, and electronic circuit is constant, so sound effect is bad.

The principle of electronic horn sounding is sounding with the break-make of an electronic switching circuit control loudspeaker solenoid now.The vibration frequency of this on-off circuit is fixed.This frequency is adjusted on the mechanical intrinsic concussion frequency of loudspeaker.Mechanical natural vibration frequency changes (comprising environment temperature and ambient pressure) with external environment, and the frequency of horn switch circuit is fixed, always thereby loudspeaker are worked under resonant condition, so sound pressure level will reduce.

In addition, during the power supply voltage up-down of loudspeaker, the also lifting of energy of the solenoid gained of loudspeaker, therefore loud when voltage is high, when voltage is low, sound is little, so just might make the phenomenon of when supply voltage raises, forging iron (what is called forge iron be exactly in the vibrational system mechanical parts collide), thereby produce noise.

Summary of the invention:

The utility model purpose is to disclose a kind of adaptive intelligent electronic horn, can effectively solve above 2 problems, the variation that drives the electronic circuit frequency of sound horn and waveform and be with environment changes, the variation that can conform, thus the sound pressure level of loudspeaker is not reduced.

The utility model composition includes mechanical sound-producing device 1, solenoid 2, driving circuit 3 and oscillatory circuit 4, it is characterized in that: the sensor 5 that connects sense mechanism sound-producing device vibration frequency between mechanical sound-producing device 1 and the oscillatory circuit 4, voltage-controlled make-to-break ratio is adjusted circuit 6 and/or temperature control make-to-break ratio and is adjusted circuit 7 and be connected in oscillatory circuit 4, is used for the oscillation frequency and the waveform width of control oscillation circuit 4.

The utility model sensor S and resistance R 2 also connect back series resistor R1, sensor S is placed near the mechanical sound-producing device 1, oscillatory circuit 4 is selected the 555IC chip for use, by resistance R 3, R4, thermistor R*, diode D1, D2 and capacitor C 1, C2 is a 555IC chip periphery element, wherein resistance R 4, serial connection diode D1, with capacitor C 1, C2, generation has the identical signal of mechanical type machinery sound-producing device 1 make-to-break ratio, driving circuit 3 is to be made of high-power FET T and capacitor C 4, capacitor C 4 is connected in parallel on the output terminal of field effect transistor T, the work of machinery sound-producing device 1, sensor 5S feeds back to 2 of oscillatory circuit 4 with mechanical oscillation signal, 6 ends, produce the synchronizing signal consistent with mechanical vibration performance, 2 of oscillatory circuit 4 is added to, 6 ends.It is synchronous with the mechanical vibrating system natural frequency that the output signal of 3 ends of control oscillation circuit 4 keeps, 7 pin of oscillatory circuit 4, and promptly control end is being controlled the RC charging and discharging circuit, when 7 pin of oscillatory circuit 4 are disconnection (high impedance), the charging of RC loop; When 7 pin of oscillatory circuit 4 are conducting, during Low ESR, the discharge of RC loop; Between the electric capacity charge period, electric current is through D1, R4, R* circulation; During capacitor discharge, electric current is through D1, R4, R* circulation; Adjust the resistance value ratio of R4, R*, just can make time base circuit produce the signal of different make-to-break ratio driving device sound-producing device 1 sounding.Driving circuit 3 is made of high-power FET T and

capacitor C

4, and 3 pin of oscillatory circuit 4 are control signal output ends, are controlling the break-make of high-power FET T, and the superpotential in capacitor C 4 absorption circuits prevents to puncture high-power FET T.

Description of drawings

Fig. 1 is the utility model circuit block diagram;

Fig. 2 is the utility model embodiment basic circuit diagram.

Embodiment:

Sensor 5 described in the utility model can be a sonic sensor, or other vibration transducer or the magnetic induction sensor of mechanical sound-producing device.The oscillation frequency that is used for control oscillation circuit 4.Described voltage-controlled make-to-break ratio adjusts circuit 6 and the temperature control make-to-break ratio is adjusted the oscillating impulse width that circuit 7 is used for control oscillation circuit 4.

The set sensor of the utility model 5, voltage-controlled make-to-break ratio adjust circuit 6 and the temperature control make-to-break ratio is adjusted circuit 7, is used for the oscillation frequency and the waveform width of control oscillation circuit 4.Make the electronic circuit oscillation frequency of mechanical sound-producing device 1 depend on mechanical sound-producing device 1 mechanical vibration natural frequency.The mechanical vibration frequency change changes mechanical sound-producing device 1 electronic circuit oscillation frequency by sensor, makes the electronic circuit oscillation frequency follow mechanical natural vibration frequency.Always make mechanical sound-producing device l be operated in resonant condition, like this, when mechanical natural frequency was subjected to environmental impact, mechanical sound-producing device 1 was always in the resonant condition of the best, and Oscillation Amplitude does not reduce, thereby sound pressure level is unaffected.

When the electronic horn supply voltage raise, the energy of supplying with solenoid 2 was also many, so sound pressure level is big during high voltage, sound pressure level is little during low-voltage.In producing, the mechanical sound-producing device 1 that design is finished generally adjusts sound level with the gap of adjusting between knurl screw and the armature.When voltage was constant, the gap was big, and sound pressure level is just little; The gap is little, and sound pressure level is just big.Just reduce the gap in order to improve sound level aborning, but this gap is little, when supply voltage raise, Oscillation Amplitude strengthened and forges iron, thereby produced noise.This method provides a kind of circuit, during high voltage, reduces the make-to-break ratio of oscillatory circuit 4 oscillating impulses, and the average energy that mechanical sound-producing device 1 solenoid is obtained reduces, thereby amplitude is reduced; During low-voltage, increase make-to-break ratio, the average energy that mechanical sound-producing device 1 solenoid is obtained raises, thereby mechanical sound-producing device 1 Oscillation Amplitude increases, thereby makes sound pressure level obtain adjusting, and has solved and has wanted to increase sound pressure level, is afraid of the contradiction of forging iron again.

In addition, mechanical sound-producing device 1 is when environment temperature reduces, and the gap smaller between knurl screw and the armature, sound pressure level increase, the phenomenon but forge iron this moment easily; When machinery sound-producing device 1 environment temperature raise, it is big that the gap between knurl screw and the armature becomes, and sound pressure level reduces, and this is again the problem that needs are considered.For this reason, the utility model is provided with the temperature control make-to-break ratio again and adjusts circuit, and the make-to-break ratio of oscillator when temperature reduces, reduces make-to-break ratio: when temperature raises, increase make-to-break ratio.

The utility model comprises parts such as oscillatory circuit, driving circuit, solenoid, mechanical sound-producing device, sensor, temperature control make-to-break ratio adjustment circuit, voltage-controlled make-to-break ratio circuit.Adopt oscillatory circuit to produce needed pulse electrical signal, remove to promote solenoid by driving circuit and produce magnetic field, magnetic field makes mechanical sound-producing device vibration and sounding as external force.When causing sound pressure level to change owing to environment temperature and ambient pressure etc. or change in voltage, its frequency change is given oscillatory circuit by sensor feedback, and oscillation frequency is changed; Also adjust circuit simultaneously and come the make-to-break ratio of control oscillation circuit, thereby make it keep sound pressure level not descend by temperature control make-to-break ratio adjustment circuit and voltage-controlled make-to-break ratio.

Claims

1. adaptive intelligent electronic horn, its composition includes mechanical sound-producing device (1), solenoid (2), driving circuit (3) and oscillatory circuit (4), it is characterized in that: connect the sensor (5) of sense mechanism sound-producing device vibration frequency between mechanical sound-producing device (1) and the oscillatory circuit (4), a voltage-controlled make-to-break ratio is adjusted circuit (6) And temperature controlMake-to-break ratio is adjusted circuit (7) and is connected in oscillatory circuit (4), is used for the oscillation frequency and the waveform of control oscillation circuit (4).

2. a kind of adaptive intelligent electronic horn as claimed in claim 1 is characterized in that: sensor (5) can be a sonic sensor.Or the other vibration transducer of mechanical sound-producing device or magnetic induction sensor, capacitive transducer.The oscillation frequency that is used for control oscillation circuit (4).

3. a kind of adaptive intelligent electronic loudspeaker as claimed in claim 1, it is characterized in that: the sensor (5) that connects sense mechanism sound-producing device vibration frequency between mechanical sound-producing device (1) and the oscillatory circuit (4), voltage-controlled make-to-break ratio is adjusted circuit (6) and/or temperature control make-to-break ratio and is adjusted circuit (7) and be connected in oscillatory circuit (4), is used for the oscillation frequency and the waveform of control oscillation circuit (4).Sensor S and resistance R 2 also connect back series resistor R1, sensor S is placed near the mechanical sound-producing device (1), oscillatory circuit (4) is selected the 555IC chip for use, by resistance R 3, R4, thermistor R*, diode D1, D2 and capacitor C 1, C2 is a 555IC chip periphery element, wherein resistance R 4, serial connection diode D1, with capacitor C 1, C2, generation has the identical signal of mechanical type machinery sound-producing device (1) make-to-break ratio, driving circuit (3) is to be made of high-power FET T and capacitor C 4, capacitor C 4 is connected in parallel on the output terminal of field effect transistor T, sensor (5) S feeds back to 2 of oscillatory circuit (4) with mechanical oscillation signal, 6 ends, 2 of oscillatory circuit (4) is added to, 6 ends, the output signal and the mechanical vibrating system natural frequency of 3 ends of control oscillation circuit (4) are synchronous, 7 foot control systems of oscillatory circuit (4) the RC charging and discharging circuit, during the capacitor discharge, electric current is through D1, R4, the R* circulation; Adjust the resistance value ratio of R4, R*, the driving device sound-producing device (1) that just can make time base circuit produce different make-to-break ratios take place signal, 3 pin of oscillatory circuit (4) are the break-make that high-power FET T is being controlled in control signal output, the superpotential in capacitor C 4 absorption circuits.