CN2083810U

CN2083810U - Radio/ remote alarm device

Info

Publication number: CN2083810U
Application number: CN 89210242
Authority: CN
Inventors: 孙磊; 季尔详
Original assignee: SUN JING JI ERXIANG
Current assignee: SUN JING JI ERXIANG
Priority date: 1989-03-20
Filing date: 1989-03-20
Publication date: 1991-08-28

Abstract

The utility model discloses a radio/ remote alarm device, comprising a transmitter and a receiver. The transmitter adopts a resonance coil L, a resonant capacitance C1, 2, a power supply two magnetic rod coupling retreat capacitance C3 of two magnetic rods, which can dispatch 1610 khz signals. The receiver is a radio, a radio/alarm switch K2, a positive feedback capacitance C14 and an alarm controller BG4 are arranged between an audio detector diode and a propel amplifier tube, and the transmitter can continuously dispatch signals in bags. The receiver is carried by the user, when the bag is stolen or be forgotten more than two meters away from the user, the receiver can dispatch an alarm sound because of no monitor signals, and users can also listen to the broadcast with the receiver.

Description

Radio/ remote alarm device

The utility model is a kind of radio reception/remote control alarming unit, is applicable to that journey by bus or wait by bike when carrying valuable property and use.

Present antitheft case and bag mostly are hidden in alarm in the bag, can send warning automatically when case and bag are opened or be raised, but little by the chimes of doom loudness that spreads out of in the case.Especially on the road case and bag all are placed on the luggage carrier, and people and thing have certain distance, add car body vibration again, and the noisy and owner of environment is sleepy or the like, therefore if really have warning also to be difficult to allow the people hear.In addition, if case and bag pass into silence onboard, can not send chimes of doom yet.As seen its warning function is perfect inadequately.

In order to overcome above-mentioned defective, but the utility model can provide the dual-purpose apparatus of a kind of radio reception, remote-controlled warning.

The concrete structure of accompanying drawings each several part: warning system of the present utility model is formed (shape Fig. 2 C regards sb. as an outsider) by transmitter and receiver.Transmitter has housing 1, power supply indicator 2 and mains switch 3.In the transmitter as shown in Figure 3, by resonant groove path L, resonant capacitance C1,2, oscillating tube BG1,2, biasing resistance R1,2, positive

feedback capacitor C

4,5, power supply moves back even C3, power supply indicator LED, resistance R 3, power supply 6V, K switch 1 is formed.

In order to improve the transmitting range of signal, the resonance coil L of this machine has adopted two bar magnets, and has carried out impedance conversion.Its equivalent electric circuit has four terminations, and wherein 2,4 ends are connected on respectively on oscillating tube BG1,2 the collector electrode, make the load impedance of oscillating tube comparatively reasonable, thereby have improved the collector current of oscillating tube, has alleviated the parallel connection influence of oscillating tube internal resistance to resonant groove path.The other two

ends

1,5 of resonance coil are connected on the resonant capacitance C1,2, have improved Q value and resonance potential, make resonance potential greater than supply voltage, thus can send frequency be 1610KHZ than the high power signal, and reach two meters command range.

Receiver has housing 8, radio reception/warning change over switch 7, tuning knob 4, volume knob 5, dial 6(regard sb. as an outsider shape Fig. 2 a, b).

Receiver is to have increased control assembly on existing wireless basis.Receiver comprises reception and these several parts of mixing, intermediate frequency amplification, detection, promotion amplification and power amplifier, referring to Fig. 1.The utility model has just increased reception/warning change over switch K2, positive feedback capacitor C 14 and controlling alarm pipe BG4 between audio frequency detection tube D3 and promotion amplification BG5.As shown in Figure 4; The element that comprises detection, promotion amplifier section has detection tube D3, capacitor C 10-14, resistance 9-11, volume trim-pot DW1, promotion amplifier tube BG5.

When receiver is used as broadcast receiver, radio reception/warning change over switch K2 is turned to radio reception side A.The contact 2,3 of K2 and 5,6 is closed respectively, and the signal that is transmitted by reception mixing, intermediate frequency amplification, demodulator probe enters power amplifier and loudspeaker Y D by promoting to amplify, and recovers the function of radio receiver of receiver.

When change over switch K2 is turned to warning side B, the contact 1 of K2 and 2 conductings, the positive feedback capacitor C 14 that is connected on the power tube BG6 collector electrode is joined with promotion pipe BG5 base stage and resistance R 11 etc. formed 800HZ chimes of doom generation circuit, D sends chimes of doom by loudspeaker Y.The control circuit of receiver is made up of circuit (see figure 1) before the broadcast receiver demodulator probe and control valve BG4.When K2 being turned to warning side B, the contact 5 of K2 and 4 closures, by the 1610KHZ alarm control signal that transmitter is sent, through receiving mixing, intermediate frequency amplifies, and detection forms the base stage that direct voltage is given control valve BG4, makes the BG4 conducting, thereby with BG5 ground connection.Thereby the chimes of doom generation circuit of 800HZ quits work.

Transmitter adopts 6 volts of batteries as power supply.Transmitter put into be monitored before the article, open the switch of transmitter earlier, it just sends the signal of 1610KHZ incessantly, receives for receiver, so that carry out remote control.

When case and bag stolen, transmitter and owner in the bag at one's side the distance between the receiver above more than two meters the time, the control signal that receiver is received is very faint, direct voltage after detection can not make control valve BG4 conducting again, so started working again by the chimes of doom generation circuit that positive feedback capacitor C 14 and sound discharge road constitute, D sends chimes of doom by loudspeaker Y.

This radio reception/remote control alarming unit can broadcast listening, can make antitheft, the anti-control device of losing again and use.

Claims

1, the utility model is a kind of radio reception/remote control alarming unit of being made up of Receiver And Transmitter, receiver comprises casing 8, tuning knob 4, volume knob 5, dial 6, radio reception/warning change over switch 7, and the element of parts such as reception and mixing, intermediate frequency amplification is arranged in the machine.Transmitter comprises casing 1, power supply indicator 2, mains switch 3, and casing is interior by resonant groove path L, resonant capacitance C ₁, C ₂, oscillating tube BG ₁, 2, biasing resistance R ₁, 2, positive and negative routed capacitor C ₄, 5, power supply moves back even capacitor C ₃, power supply indicator LED, resistance R ₃, power supply 6V and K switch ₁, it is characterized in that between the detection of described radio reception/remote control alarming unit receiver and these two parts of power amplification the promotion amplifier unit being arranged; The transmitter resonance coil L of radio reception/remote control alarming unit has adopted the equivalent electric circuit of two bar magnets.

2, radio reception/remote control alarming unit according to claim 1, the contact 1 of change over switch K2 that it is characterized in that its promotion amplifier section is connecting the collector electrode of power tube BG6 by positive and negative routed capacitor C 14, the contact 2 of K2 and promote the base stage of amplifier tube BG5, collector electrode and resistance R 11, the R15 of controlling alarm pipe BG4 joins.The contact 3 of K2 links to each other with the positive pole of capacitor C 13, and the negative pole of C13 connects the centre cap of DW1.The contact 4 of K2 is connecting the base stage of control valve BG4.The contact 5 of K2 links to each other with the positive pole of filter capacitor C10, detector diode D3.The contact 6 of K2 links to each other with resistance R 9 one ends, and the other end of R9 links to each other with DW1, R10.The emitter of the other end of C11, DW1 and BG4, BG5 is ground connection all.

3, radio reception/remote control alarming unit according to claim 1, the resonance coil L that it is characterized in that its transmitter has adopted two bar magnets, its substitutional connection has four terminations, and 1,5 ends link to each other with resonance electrical equipment C1,2, and 2,4 ends divide and to be connected in addition on oscillating tube BG1,2 the collector electrode.BG1,2 grounded emitter.Circuit 3 ends are connected in the contact 1 of mains switch K.The parallel circuits of being made up of R1, C4 one terminates on the collector electrode of BG1, and the other end is connected on the BG2 base stage, is made up of on the base stage that parallel circuits one terminates at BG1 R2, C5, and the other end is connected on the collector electrode of BG2.The two ends of filter capacitor C3 are connected on respectively on the both positive and negative polarity of power supply.Resistance R 3 and indicator light LED series connection, another termination mains switch K of R3, another termination power cathode of LED.