JPS59208970A - Interphone device - Google Patents

Abstract

PURPOSE:To transmit accurately a call from a slave set to a master set even if a CPU is failed by providing separately a CPU failure detecting circuit and transmitting a call to a call tone generating circuit with priority to attain calling when the call is given from the slave set while this failure detection circuit is actuated. CONSTITUTION:When the CPU6 is normal, a display device Lc1 and a speaker SP are driven. When the CPU6 is failed, since a CPU normal signal which is transmitted from the CPU6 normally for each prescribed time is not transmitted to the CPU failure detecting circuit 10, the CPU failure detecting circuit 10 detects it and becomes operative. Thus, when a call switch 11 is operated and a call detecting circuit 31 is actuated, an output of an OR gate 1B and an output of the CPU failure detecting circuit 10 are applied to a call tone generating circuit 8 through an AND gate 1A to operate the call tone generating circuit 8 thereby outputting a call tone from the speaker SP.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention (d) uses a microprocessor in the parent device (Ill), and is configured to detect and display from which child device a call has been made by the microprocessor. and regarding intercom devices.

Conventional configuration and its problems FIG. 1 shows the configuration of a conventional intercom device.

The configuration of this conventional example will be explained below with reference to FIG. In FIG. 1, II is a terminal unit 11/F output circuit unit, B2 is a display circuit unit that detects and displays a call 17 of a slave unit,
13. is a master unit, and is equipped with a circuit unit that displays the corresponding 11f output location and sounds a ringing tone in response to a call from a slave unit. And 11~I 7I Kesowazowa call switch, 21~27L is II output switch -11~
A latch circuit that latches the call signal from 1n, L a
1~L a 7L is a call confirmation display; day~37+
r, j, call signal, call confirmation display Ln1~L a
This is a call detection circuit that applies voltage to representative display devices Lal to Lbn for each of C1 and C1 and displays the signal. 41 to 4n are Ant Gate, 5 is Or Kate, and 6 is Micro Process (hereinafter referred to as C).
P[J], 7 is a display circuit for displaying the corresponding part of the call, Lc1 to Lcn are the corresponding part of the call drive driven by this display circuit 7, 8 is 11. jl,j
,, ff i, l-l sound generating circuit that generates i, S
P is a speaker, 5) V1 Tecoder.

Next, the dynamic f'[ of the above conventional example will be explained. In the 11th shift 1, when the call switch 1J is operated, the signal is held in the launch circuit 21, and the call confirmation display f,
r a lights up first. And this state 1tll
At the same time as the representative display L1]1 is detected by the output detection circuit 31, it is detected that there is a call from the slave unit J3. let them know.

Base unit B, l-1: , CP t noro, Teko-ku 9
, ANDGATE 41~/I 71. , or gate t.5 detects the number of the calling place and determines the corresponding place to call.

Then, this state is output and the number display circuit 7 lights up the display TJc1. Also at this time, the ringing tone generation circuit 8
is operated, and a ringing tone is output from the speakers S and li'.

However, in the above-mentioned conventional example, if CP[J6 malfunctions for some reason, the call from the slave unit B1 is sent to the base unit 13. There is a problem that it cannot be determined at all. In particular, if the hospital intercom does not transmit calls from the patient (handset) only to the guard l1llI (Koji1 machine side), this could become a serious problem that could affect the patient's life. This is extremely inconvenient for the intercom device introduced above (+E).

OBJECTS OF THE INVENTION The present invention eliminates the above-mentioned drawbacks of the conventional technology, and provides an advantage in that calls from the handset are transmitted to the base unit at station 1, even if the CI U has an abnormality due to its internal configuration. The object of the present invention is to provide an intercom device that has the following features.

Structure of the Invention In order to achieve the above object, the present invention provides a separate CPU abnormality detection circuit, and when a call is received from a handset while this abnormality detection circuit is operating, the call is given priority to generate a ring tone. It is configured to send the information to the circuit and make a call.

DESCRIPTION OF THE EMBODIMENTS The configuration of an embodiment of the present invention will be described below with reference to the drawings. In FIG. 2, the same reference numerals as in FIG. 1 are used to indicate the same components as in FIG. 1. And JOld
, CJ) [CI'U that operates when J6
Abnormality detection circuit], 13 is a call detection circuit 31 to 37b
An OR gate that takes the output of
The operation of the second embodiment will be described below.

When the call switch 11 of the handset is operated, its output is held by the latch 21, and the confirmation display T, ;I, lights up. Since this state is detected by the call detection circuit 31, 1 for the representative display turns on, and the IrQ II
;7 from the 1r- machine (+9 out, that's what happened to the base machine 1)
-31 will be notified. The operation outside this point is exactly the same as that of the conventional intercom device shown in FIG. (!P [J
If 6 is normal, the ink-pump device continues to operate in the same way as the conventional ink-pump device shown in Figure 1, and the display LC:
1 and speaker SP are driven. If PU 6 becomes abnormal, CJ. ' Is the (E J) [J-+Ji normal signal sent from U 6 at regular intervals (! l' U abnormal '1; 5 because it is no longer sent to the detection circuit 10 (-; detects this and enters the dynamic ft state.Therefore, in this state, when the call switch 11 is operated and the call detection circuit 31 operates, the output of the OR gate 1.13 and CI)j
The output of the J abnormality detection circuit 10 is applied to the ringing 1['1 generating circuit 8 through the Antogame 1 IA, operating the ringing tone generating circuit 8, and outputting a ringing tone from the speaker SP. Therefore, even when CI)U(i) is in an abnormal state, the base unit can detect a call from the slave unit.

The C I) U abnormality detection circuit 10 is configured to send a reset signal to the CPU 6 after a certain period of time after detecting an abnormality in (C1) U6.
It is also possible to automatically reset 6 and not return to 11-permanently moving A'[.

Effects of the Invention As is clear from the second embodiment, the present invention includes a circuit for detecting an abnormality in the microprocessor on the base unit side, and a circuit connected to the output of this detection circuit and each slave unit to detect a call. The output of the circuit is used to activate the antenna, and the output is used to drive a separately provided ringing tone generation circuit, so that even if the microbrosenoza malfunctions, it can detect a call from the handset. Therefore, according to the present invention, even if the microprocessor is abnormal, it is possible to recognize a call from a slave unit, and the present invention is particularly effective as a hospital intercom. and,
According to the present invention, the abnormality detection circuit, the amplifier circuit, etc. can be constructed by simply adding 11 inputs, and the construction as a whole is simple and extremely advantageous in practice.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a conventional intercom device, and FIG. 2 is a block diagram of an intercom device according to an embodiment of the present invention. 11~1yL-・Call switch, 21~2γt latch circuit, LaI~L;]TI Call confirmation indicator, 3
1. -'-3n-Call detection circuit, 1. J l), ~L
l)n, Representative indicator light, 41-47'L Ant game-1, 5-OR gate, 6 Microprocessor, 7
Number display circuit, 8. Ringing tone generation circuit, 9. Decoder, 10. Microprocessor abnormality detection circuit, IA
Ant Gate, 1B Or Gate, LCI~IJcn・
Base unit call indicator, SI) ・Speaker, 13.
Handset calling circuit section, II2/calling display circuit section, B3
Parent device.

Claims (1)

[Claims] The output of the call detection circuit that detects a call from the slave unit is applied to the base unit equipped with a microprocessor, and the micro processor detects whether there is a call from the slave unit or not.
Knowing this, the device is configured to light up the display corresponding to the machine in which the F-11'F output occurs, and an abnormality detection circuit is installed in the base unit to detect abnormal operation of the microprocessor described in 1-. When the output of this detection circuit and the output of the ringing detection circuit appear at the same time, a separately provided ringing sound generation circuit is activated, so that even when the microbrosenozer is abnormal, the ejection sound generation circuit can be operated. "Output": An intercom device configured to detect a call from a handset.