CN202648792U

CN202648792U - Vibration detection device

Info

Publication number: CN202648792U
Application number: CN 201220335686
Authority: CN
Inventors: 闵志春; 马占平; 范明; 王�琦
Original assignee: BEIJING GREAT WALL ELECTRONIC EQUIPMENT Co Ltd
Current assignee: BEIJING GREAT WALL ELECTRONIC EQUIPMENT Co Ltd
Priority date: 2012-07-10
Filing date: 2012-07-10
Publication date: 2013-01-02
Anticipated expiration: 2022-07-10

Abstract

The utility model provides a vibration detection device, comprising a vibrating sensor B1, a signal conditioning circuit, a microcontroller, an audible alarm, and a wireless transmitting module. The vibrating sensor is connected with the signal conditioning circuit. The signal conditioning circuit is connected with the microcontroller. The microcontroller is connected with the audible alarm and the wireless transmitting module. The vibrating sensor detects vibration state and outputs vibration signals to the signal conditioning circuit. The signal conditioning circuit transforms the vibration signals input by the vibrating sensor into stable level and output the level to the microcontroller. The vibrating microcontroller detects values of the level output by the signal conditioning circuit thereby detecting whether vibration exists. When no vibration exists for 30 seconds, the microcontroller controls the audible alarm to alarm and transmits a non-vibration signal through the wireless transmitting module. The audible alarm sends out alarm sound so that rescuers can find persons in distress faster along a transmission direction of the sound. Sensitivity and detection delay time of the vibration detection device can be adjusted.

Description

A kind of vibration detection device

Technical field

The utility model relates to a kind of pick-up unit, is specifically related to a kind of vibration detection device, belongs to communication technical field.

Background technology

Vibration detection generally is applied to antitheft field, such as antitheft and home security of automobile, motorcycle etc.Sometimes also be applied to the fault alarm field, surpass permissible value such as the vibration of machine, its vibration detection switch will provide reports to the police or the closing machine power supply, and the protection machine is injury-free.In multiple uncertain places such as fire-fighting, emergency command and traffic, when the rescue personnel goes to rescue site to implement rescue, because the rescue personnel does not know the situation of rescue site, be subjected to the impact of rescue site smog the situations such as stupor may occur, and usually there is the problem that can't communicate by letter or exist the communication barrier in rescue site, on-the-spot outer rescue personnel can't understand the situation of rescue site immediately, also just can't take the means such as reinforcement, so entail dangers to rescue site rescue personnel's life security.

Summary of the invention

In view of this, the utility model provides a kind of vibration detection device, can human body vibration and can be in the situation that human body is motionless transfers out by buzzer warning and wireless transmitter module.

A kind of vibration detection device, this pick-up unit involving vibrations sensor B1, signal conditioning circuit, microcontroller, voice guard and wireless transmitter module, wherein vibration transducer B1 is connected with signal conditioning circuit, signal conditioning circuit is connected with microcontroller, and microcontroller is connected with wireless transmitter module with voice guard respectively;

Signal conditioning circuit comprises resistance R 69, R72, R74, R75, R76, R77, R78, R79, capacitor C 59, C60, C63, C87, C88, comparer N6A, N6B, diode V25, light emitting diode V26 and pull-up resistor R70, R71;

Annexation: vibration transducer B1 one termination power, connect the in-phase input end of comparer N6A behind the other end series capacitance C87, resistance R 79 1 terminates between vibration transducer B1 and the capacitor C 87, other end ground connection, resistance R 74 1 terminates at the in-phase input end of comparer N6A, other end ground connection;

Resistance R 75 1 ends connect the inverting input of comparer N6A, other end ground connection, and resistance R 76 1 terminates at the inverting input of comparer N6A, another termination power, resistance R 75 two ends shunt capacitance C88; Comparer N6A positive source connects power supply, power cathode ground connection, and capacitor C 63 1 terminates at comparer N6A positive source, other end ground connection;

Comparer N6A output terminal links to each other with diode V25 is anodal, pull-up resistor R70 one terminates at comparer N6A output terminal, another termination power, diode V25 negative pole is connected with comparer N6B in-phase input end, after resistance R 77 and capacitor C 59 parallel connections and the parallel connection one terminates between diode V25 negative pole and the comparer N6B in-phase input end, other end ground connection, and resistance R 77 and capacitor C 59 composition timing circuits; Resistance R 69 1 ends are connected with comparer N6B inverting input, and the other end is connected on comparer N6A inverting input, and capacitor C 60 1 terminates at comparer N6B inverting input, other end ground connection;

Link to each other with external microcontroller behind the comparer N6B output terminal resistance in series R78, one of pull-up resistor R71 terminates at comparer N6B output terminal, another termination power, light emitting diode V26 negative pole is connected between resistance R 78 and the external microcontroller, connects power supply behind the light emitting diode V26 cathode series resistance R72.

Beneficial effect: the utility model is by vibration transducer and the vibration of signal conditioning circuit human body, and the resistance R 74 by the conditioning signal modulate circuit can adjusting detecting device sensitivity, regulating resistance R77 can adjusting detecting device delay time, i.e. the sensitivity of whole device and to detect delay time all adjustable.

Description of drawings

Fig. 1 is the schematic diagram of the utility model vibration detection device.

Fig. 2 is the schematic diagram of the utility model signal conditioning circuit.

Embodiment

Below in conjunction with the accompanying drawing embodiment that develops simultaneously, the utility model is described in detail.

As shown in Figure 1, the utility model provides a kind of vibration detection device, this pick-up unit involving vibrations sensor B1, signal conditioning circuit, microcontroller, voice guard and wireless transmitter module, wherein vibration transducer B1 is connected with signal conditioning circuit, signal conditioning circuit is connected with microcontroller, and microcontroller is connected with wireless transmitter module with voice guard respectively.

Wherein vibration transducer detects vibrational state and vibration signal is exported to signal conditioning circuit.

Signal conditioning circuit converts the vibration signal of vibration transducer input to stable level, is about to the height that converts level to that has or not of vibration, and exports to microcontroller.

Thereby the height of microcontroller detection signal modulate circuit output level detects friction is arranged, when surpassing the 30s friction, the control voice guard sends warning, and the friction signal is spread out of by wireless transmitter module.

Voice guard sends alarm sound allows the rescue personnel find more fast distress personnel along the transmission sound direction.

As shown in Figure 2, signal conditioning circuit comprises resistance R 75, R79, R74, R76, R68, R69, R77, R80, R78, R72, capacitor C 87, C88, C63, C60, C59, comparer N6A, N6B, diode V25, light emitting diode V26, pull-up resistor R70, R71; And the model of comparer N6A and comparer N6B is LM393AD, and the model of diode V25 is 1N4148.

Annexation: vibration transducer B1 one termination power, the in-phase input end that connects comparer N6A behind the other end series capacitance C87, resistance R 79 1 terminates between vibration transducer B1 and the capacitor C 87, other end ground connection, resistance R 74 1 terminates at the in-phase input end of comparer N6A, other end ground connection, and the capacitor C 87 of 100nF, the resistance R 74 of 680k and the resistance R 79 of 82k form charging and discharging circuit;

Resistance R 75 1 ends connect the inverting input of comparer N6A, other end ground connection, resistance R 76 1 terminates at the inverting input of comparer N6A, another termination power, resistance R 75 two ends shunt capacitance C88, and the loop that the resistance R 76 of the resistance R 75 of the capacitor C 88 of 100nF, 33k and 33k forms produces the first compare threshold; Comparer N6A positive source connects power supply, power cathode ground connection, and capacitor C 63 1 terminates at comparer N6A positive source, other end ground connection;

Comparer N6A output terminal links to each other with diode V25 is anodal, pull-up resistor R70 one terminates at comparer N6A output terminal, another termination power, diode V25 negative pole is connected with comparer N6B in-phase input end, after resistance R 77 and capacitor C 59 parallel connections and the parallel connection one terminates between diode V25 negative pole and the comparer N6B in-phase input end, other end ground connection, and the capacitor C 59 of the resistance R 77 of 3M and 10uF forms timing circuit; Resistance R 69 1 ends are connected with comparer N6B inverting input, the other end is connected on comparer N6A inverting input, capacitor C 60 1 terminates at comparer N6B inverting input, other end ground connection, and the loop that the capacitor C 60 of the resistance R 69 of 0 Ω and 100nF forms produces the second compare threshold;

The principle of work of signal conditioning circuit: when vibration is arranged, vibration transducer B1 is equivalent to a switch (always opening and closing), vibration transducer B1 through a charging and discharging circuit after, vibration signal (magnitude of voltage) is exported to comparer N6A inverting input, the output terminal of comparer N6A compares magnitude of voltage and first compare threshold of vibration signal, when the magnitude of voltage of vibration signal is higher than first threshold, the output terminal output high level of comparer N6A, it is diode V25 conducting, otherwise output low level, diode V25 disconnects; When diode V25 conducting, 59 chargings produce delay times to capacitor C in loop by resistance R 70 and diode V25, comparer N6B compares vibration signal and the second comparative threshold voltage, when being higher than the second compare threshold, the magnitude of voltage of vibration signal namely exports high level, light emitting diode V26 has been considered as vibration for extinguishing state, and light emitting diode V26 is that luminance is considered as friction during output low level.

The utility model adopts the secondary comparison and increase timing circuit between the secondary comparison, secondary more all converts vibration signal to level signal, be about to the height that converts level to that has or not of vibration, if only adopt one-level relatively, then can't regulate delay time, in case will not send warning when namely detecting vibration, if after delay time is set, just send warning when then in this delay time, all not detecting vibration signal, like this so that whole vibration detection device is more reliable.

In sum, above is preferred embodiment of the present utility model only, is not be used to limiting protection domain of the present utility model.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.

Claims

1. vibration detection device, it is characterized in that, this pick-up unit involving vibrations sensor B1, signal conditioning circuit, microcontroller, voice guard and wireless transmitter module, wherein vibration transducer B1 is connected with signal conditioning circuit, signal conditioning circuit is connected with microcontroller, and microcontroller is connected with wireless transmitter module with voice guard respectively;