CN1096407A

CN1096407A - Multi-function calling device

Info

Publication number: CN1096407A
Application number: CN 93106808
Authority: CN
Inventors: 郭湘泗
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-06-08
Filing date: 1993-06-08
Publication date: 1994-12-14

Abstract

The present invention proposes a kind of multi-functional wireless pager, it comprises radiating portion and receiving unit, radiating portion comprises low-frequency oscillatory network and strength circuit, the output of low-frequency oscillatory network is as the power supply of strength circuit, what therefore radiating portion was launched is the radiofrequency signal of low-frequency pulse modulation, receiving unit comprises Armstrong circuit, amplifying circuit and doorbell circuit, Armstrong circuit receives the radiofrequency signal that radiating portion sends and detects wherein low frequency signal, thereafter after amplifying, control doorbell circuit, and drive sounding component and send the call signal, this pager has the many and strong advantage of applicability of function.

Description

Multi-function calling device

The present invention relates to a kind of pager (or address calling organ), especially a kind of multi-functional wireless pager.

The purposes of pager is very extensive, and kind is also a lot, such as factory, mine construction commander with pager, hospital patient with pager and alarm with pager etc.In a broad aspect, pager comprises the device of various transmitting (signal of telecommunication, light signal or acoustical signal), such as intercom, broadcaster, alarm etc.But, mostly existing pager is unifunctional, as " replying the formula electronic information device " of No. 90204079 propositions of Chinese patent application, " the hospital care calling talkback machine " that No. 90217351 propose.And these existing pagers generally adopt the signal wire transmission mode, thereby have limited its application scenario and scope.

The objective of the invention is to provide a kind of multi-function calling device of mode of wireless transmission.

For achieving the above object, multi-function calling device of the present invention comprises two parts of separation, be radiating portion (claiming translator unit again) and receiving unit, radiating portion comprises low-frequency oscillatory network and strength circuit, and its function is the wireless radiofrequency electric wave of emission by the low-frequency pulse modulation; Receiving unit comprises that Armstrong circuit, amplifying circuit and doorbell circuit, Armstrong circuit receive and detect the low-frequency pulse by radiating portion, and triggers after amplifying circuit amplifies and driving doorbell circuit working, thereby sends the call signal.

Owing to adopt wireless transmission method, thereby can in all case carry use, and can be suitable for (for example) following purposes:

1, (as 20 meters scopes) paging in limited range;

2, urge the worker to go to work on time;

3, supervise child to go to school;

4, the separation old man calls relatives;

5, patient calls the medical worker;

6, waiter calls client;

7, subordinate is called by leading body at a higher level;

8, emergency alarm;

9, making doorbell uses;

10, lose or forget after addressing or the like.

Below in conjunction with embodiment and accompanying drawing thereof purpose of the present invention, feature and advantage are further described.

Fig. 1 is the brief block diagram of the radiating portion of the multi-function calling device of proposition according to the present invention;

Fig. 2 is a physical circuit of realizing function shown in Figure 1;

Fig. 3 is the brief block diagram of the receiving unit of multi-function calling device of the present invention;

Fig. 4 is a physical circuit of realizing function shown in Figure 3.

As shown in Figure 1, the radiating portion of multi-function calling device of the present invention comprises low-frequency oscillatory network 11 and strength circuit 12, in order to the wireless radiofrequency electric wave of emission low-frequency pulse modulation.Fig. 2 has specifically illustrated a kind of circuit of realizing signal emission process shown in Figure 1, wherein integrated circuit (IC) ₁Part, the resistance R of (model is 4069) ₂Form low-frequency oscillatory network with oscillator B, the low-frequency pulse that is produced is through the power supply of other four groups of not gate parallel connected in reverse phase output as radio-frequency oscillator, the right half part of Fig. 2 is described radio-frequency oscillator, has so just obtained the radiofrequency signal by the low-frequency pulse modulation.

Fig. 3 shows the receiving unit of the pager of the present invention that matches with reflector shown in Figure 1, it comprises Armstrong circuit 21, amplifying circuit 22 and doorbell circuit 23, the radiofrequency signal of being launched by radiating portion detects low-frequency pulse through receiving circuit 21 receptions, after amplifying, trigger doorbell circuit again, send the call signal by sounding component Y at last.

Fig. 4 is for the physical circuit of the function of realization Fig. 3, wherein by inductance L ₁And capacitor C ₁The loop of forming receives the radiofrequency signal of being sent by radiating portion, and through triode BG ₁Superregenrative reception detects low-frequency pulse, that is to say, the superregenrative reception loop among Fig. 3 is mainly by L ₁, C ₁And BG ₁Form.By triode BG ₂-BG ₄The amplifying circuit of forming is to BG ₁The low-frequency pulse that detects amplifies, amplifying signal control triode BG ₅Conducting, make ic chip ₂The doorbell circuit that constitutes triggers (energized), IC ₂Output drive sounding component (loud speaker) Y, make it to send the call signal.Here IC ₂It is KD-15 series doorbell circuit.

Should be pointed out that for those skilled in the art, can carry out each one to the circuit of Fig. 2 and 4 and improve and conversion, and all can realize the function shown in Fig. 1 and 3 effectively.

Claims

A kind of multi-function calling device, comprise radiating portion and receiving unit, it is characterized in that, adopt the signal wireless transmission form between radiating portion and the receiving unit, radiating portion comprises low-frequency oscillatory network and strength circuit, the output signal of low-frequency oscillatory network is as the power supply of strength circuit, what therefore the emission part branch sent is the radiofrequency signal of low-frequency pulse modulation, receiving unit comprises Armstrong circuit, amplifying circuit and doorbell circuit, Armstrong circuit detects low-frequency pulse from the radiofrequency signal that is received, control doorbell circuit through amplifying then, and the driving sounding component sends the call signal.