CN2158112Y - Warming instrument for something lost - Google Patents
Warming instrument for something lost Download PDFInfo
- Publication number
- CN2158112Y CN2158112Y CN 92218182 CN92218182U CN2158112Y CN 2158112 Y CN2158112 Y CN 2158112Y CN 92218182 CN92218182 CN 92218182 CN 92218182 U CN92218182 U CN 92218182U CN 2158112 Y CN2158112 Y CN 2158112Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- output
- capacitor
- resistance
- frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Burglar Alarm Systems (AREA)
- Emergency Alarm Devices (AREA)
Abstract
The utility model relates to an alarm device of preventing objects from losing, which is composed of a transmission machine and a receiving machine, wherein, the transmission machine is installed in the objects which are prevented from losing, and the receiving machine is portably carried by an owner. The output of a low frequency oscillation circuit of the transmission machine is connected with an RC bridge type critical oscillation circuit, and the output of the critical oscillation circuit is connected with an oscillation transmission circuit through an amplifying circuit. A high discharge circuit of the receiving machine is connected with a frequency discriminating circuit, the output of the frequency discriminating circuit is connected with an audio frequency oscillation circuit through a middle discharge detection circuit and a low discharge rectification circuit, and the output of the audio frequency oscillation circuit is connected with a piezoelectric buzzer.
Description
The utility model relates to a kind of warning device, especially for the warning device that prevents that article from losing.
At present, article loss phenomenon comparatively more sees that especially some valuables in case lose, will cause bigger loss.And, except self-lost objects, also there is stolen phenomenon to take place often.Till now, also there is not a kind of device that prevents that article from losing that is exclusively used in.
The purpose of this utility model is exactly in order to address the above problem, and a kind of lost objects alarm of special use is provided.
Technical solution of the present utility model:
A kind of lost objects alarm, it include the transmitter formed by low-frequency oscillatory network, RC bridge-type threshold oscillation circuit, amplifying circuit, vibration radiating circuit and by receiving loop, High Amplifier Circuit, frequency-discriminating circuit, in put detecting circuit, lowly put the receiver that rectification circuit, audio oscillator circuit are formed, transmitter is installed in by in the anti-article of losing, receiver is carried owner at one's side, wherein, in transmitter, low-frequency oscillatory network is by oscillating tube Q
1, Q
2, capacitor C
1, resistance R
1, R
2, R
3Form, RC bridge-type threshold oscillation circuit is by oscillating tube Q
3, resistance R
4--R
11, capacitor C
3--C
6Form, amplifying circuit is by amplifier tube Q
4, resistance R
12--R
16Form, the vibration radiating circuit is by oscillating tube Q
5, resistance R
17--R
19, capacitor C
9--C
12, inductance L
1, L
2Form; In receiver, receiving loop by capacitor C '
1, inductance L '
1Form, High Amplifier Circuit is by amplifier tube Q '
1, resistance R '
1--R '
3, capacitor C '
2, C '
3, inductance L '
2Form, and the input of the output of receiving loop and High Amplifier Circuit is of coupled connections, frequency-discriminating circuit is by transformer B
1, B
2, capacitor C '
4--C '
8, resistance R '
4--R '
9, diode D
1, D
2Form, in put detecting circuit by transistor Q '
2, capacitor C '
10--C '
12, resistance R '
10--R '
14, diode D
3Form, hang down and put rectification circuit by transistor Q '
3, capacitor C '
14--C '
16, resistance R '
15--R '
19, diode D
4Form, audio oscillator circuit is by oscillating tube Q '
4, Q '
5, Q '
6, resistance R '
20--R '
24, piezoelectricity news Chinese percussion instrument HD forms, and it is characterized in that:
A, in transmitter, capacitor C is passed through in the output of low-frequency oscillatory network
2With the input of RC bridge-type threshold oscillation circuit be oscillating tube Q
3Base stage connect, the output of RC bridge-type threshold oscillation circuit is oscillating tube Q by the output of amplifying circuit and vibration radiating circuit
5Base stage connect, the output of vibration radiating circuit is from inductance L
1, capacitor C
12Draw as the output of transmitter and launch radiowave;
B, in receiver, the output of High Amplifier Circuit is from transistor Q '
1Collector to draw the input that connects frequency-discriminating circuit be transformer B
1, B
2Elementary, the output of frequency-discriminating circuit from resistance R '
9Draw with in put detecting circuit input be transistor Q '
2Base stage connect, in put detecting circuit output from capacitor C '
12Drawing with hanging down the input of putting rectification circuit is transistor Q '
3Base stage connect, low output of putting rectification circuit from resistance R '
19The input of drawing with audio oscillator circuit is oscillating tube Q '
4Base stage connect, the output of audio oscillator circuit is from oscillating tube Q '
6Draw and meet piezoelectricity news Chinese percussion instrument HD.
The utility model is made of transmitting set and receiver, and frequency is selected in amateur frequency band, avoiding interference normal wireless communication, and adopts the double modulation mode, so can not produce interference to the radio communication that adopts dull system.The utility model operating distance can reach about tens meters, can send the alarm sound signal when article are lost or be stolen, and can be used for multiple article and lose and report to the police, and the article that can utilize the utility model to find within the specific limits to lose.The utility model is simple in structure, and technical difficulty is little, makes and produces easily, is easy to promote.
Fig. 1 is a transmitter electrical schematic diagram of the present utility model;
Fig. 2 is a receiver electrical schematic diagram of the present utility model.
As Fig. 1, the signal modulation that the transmitter low-frequency oscillatory network produces obtains modulated wave by the signal that RC bridge-type threshold oscillation circuit produces, this modulated wave signal amplifies through amplifying circuit, the high-frequency signal of modulating oscillation radiating circuit generation obtains frequency-modulated wave again, and this frequency-modulated wave signal is by the outputting inductance L of vibration radiating circuit
1And capacitor C
12Send.
Receiver of the present utility model such as Fig. 2, receiving loop C '
1, L '
1Receive the high-frequency signal of sending by transmitter and amplify, take out high-frequency am signal through the frequency-discriminating circuit frequency discrimination again, put detecting circuit in this amplitude-modulated signal warp and amplify, from diode D through High Amplifier Circuit
3Low frequency signal is taken out in detection, amplifies through the low rectification circuit of putting, by diode D again
4Rectifying and wave-filtering, the duty of last control audio oscillatory circuit.
When not lost by anti-lost objects, the high-frequency signal that transmitter in it sends is carried at owner's receiver receiving loop on one's body and is received, through height put, frequency discrimination, in put detection, the low direct current signal of putting an electronegative potential of rectification output, it restrains the audio oscillator circuit vibration, it is quit work, so piezoelectricity news Chinese percussion instrument HD is noiseless.
When being lost by anti-lost objects, receiver can not receive the high-frequency fm signal of transmitter emission in the article, this moment receiver High Amplifier Circuit, frequency-discriminating circuit, in put detecting circuit and lowly put rectification circuit and all do not work, then audio oscillator circuit starting oscillation work under the effect of self circuit, make piezoelectricity news Chinese percussion instrument HD send the sound, remind owner's article lost, play the warning effect.
Claims (1)
1, a kind of lost objects alarm, it include the transmitter formed by low-frequency oscillatory network, RC bridge-type threshold oscillation circuit, amplifying circuit, vibration radiating circuit and by receiving loop, High Amplifier Circuit, frequency-discriminating circuit, in put detecting circuit, lowly put the receiver that rectification circuit, audio oscillator circuit are formed, transmitter is installed in by in the anti-article of losing, receiver is carried owner at one's side, wherein, in transmitter, low-frequency oscillatory network is by oscillating tube Q
1, Q
2, capacitor C
1, resistance R
1, R
2, R
3Form, RC bridge-type threshold oscillation circuit is by oscillating tube Q
3, resistance R
4--R
11, capacitor C
3--C
6Form, amplifying circuit is by amplifier tube Q
4, resistance R
12--R
16Form, the vibration radiating circuit is by oscillating tube Q
5, resistance R
17--R
19, capacitor C
9--C
12, inductance L
1, L
2Form; In receiver, receiving loop by capacitor C '
1, inductance L '
1Form, High Amplifier Circuit is by amplifier tube Q '
1, resistance R '
1--R '
3, capacitor C '
2, C '
3, inductance L '
2Form, and the input of the output of receiving loop and High Amplifier Circuit is of coupled connections, frequency-discriminating circuit is by transformer B
1, B
2, capacitor C '
4--C '
8, resistance R '
4--R '
9, diode D
1, D
2Form, in put detecting circuit by transistor Q '
2, capacitor C '
10--C '
12, resistance R '
10--R '
14, diode D
3Form, hang down and put rectification circuit by transistor Q '
3, capacitor C '
14--C '
16, resistance R '
15--R '
19, diode D
4Form, audio oscillator circuit is by oscillating tube Q '
4, Q '
5, Q '
6, resistance R '
20--R '
24, piezoelectricity news Chinese percussion instrument HD forms, and it is characterized in that:
A, in transmitter, capacitor C is passed through in the output of low-frequency oscillatory network
2With the input of RC bridge-type threshold oscillation circuit be oscillating tube Q
3Base stage connect, the output of RC bridge-type threshold oscillation circuit is oscillating tube Q by the input of amplifying circuit and vibration radiating circuit
5Base stage connect, the output of vibration radiating circuit is inductance L
1, capacitor C
12Exit launch radiowave as the output of transmitter;
B, in receiver, the output of High Amplifier Circuit is transistor Q '
1The collector input that connects frequency-discriminating circuit be transformer B
1, B
2Elementary, the output of frequency-discriminating circuit be resistance R '
1Exit with in put detecting circuit input be transistor Q '
2Base stage connect, in put detecting circuit output be capacitor C '
12Exit be transistor Q ' with low input of putting rectification circuit
3Base stage connect, low output of putting rectification circuit be resistance R '
19Exit and the input of audio oscillator circuit be oscillating tube Q '
4Base stage connect, the output of audio oscillator circuit is oscillating tube Q '
6Collector meet piezoelectricity news Chinese percussion instrument HD.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92218182 CN2158112Y (en) | 1992-06-11 | 1992-06-11 | Warming instrument for something lost |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92218182 CN2158112Y (en) | 1992-06-11 | 1992-06-11 | Warming instrument for something lost |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2158112Y true CN2158112Y (en) | 1994-03-02 |
Family
ID=33765768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92218182 Expired - Fee Related CN2158112Y (en) | 1992-06-11 | 1992-06-11 | Warming instrument for something lost |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2158112Y (en) |
-
1992
- 1992-06-11 CN CN 92218182 patent/CN2158112Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |