JPS6243983A - Emergency alarm broadcasting receiver - Google Patents

Abstract

PURPOSE:To prevent erroneous reading of an inspection result by providing a display control means for changing a display mode of the first display element and the second display element in which the display mode is changed before and after a timer means detects a lapse of a regulating time. CONSTITUTION:A test broadcasting is transmitted from a broadcasting station, an emergency alarm broadcasting receiver is normally operated and a completion signal of a test signal is correctly received and then, the first memory circuit 11 is set, and an output thereof D goes to high level. When the outputs D, E go to 'high' level, an output H of a display control circuit 13 becomes an intermittent signal of one hertz of a high level and a low level and the first display element 20 flashes. When the output D goes to the high level, a timer circuit 18 starts a time counting operation and when an elapse of 24hr of a regulating time is detected, an output G goes to a high level, the third memory circuit 14 is set and the second display element 21 flashes. Thereby, erroneous reading of a test result can be prevented.

Description

[Detailed description of the invention] Industrial applications The present invention relates to an emergency warning broadcast receiver.

Conventional technology Emergency warning broadcasting is a means of disseminating important information to the public, such as earthquake prediction information and tsunami warnings, which have a direct and significant impact on human life and society as a whole, by transmitting emergency information through radio broadcasts and television. . This is because a specific signal (digital signal using FSK modulation) that also serves as an alarm sound is first sent out, and the alarm sound and broadcast can be heard automatically even if the receiver's power switch is turned off, such as when sleeping. It is composed of Considering the nature of broadcasting, it is important to check whether the receiving function of such an emergency warning broadcasting receiver is operating correctly. Only the end signal of the emergency warning broadcast will be transmitted from the broadcasting station at the fixed date and time for testing the reception function. If the test signal is correctly received, the reception function is confirmed by entering the termination state.

FIG. 3 does not show a conventional test circuit. A is the audio detection signal of the receiver, 1 is the F S KV input to the audio detection signal.
The IvA circuit demodulates it into a binary signal.

2 is a start signal determination circuit, which outputs and outputs control signal B when a signal that satisfies the set reception condition is transmitted and the signs match. 3 is a termination signal determination circuit which generates a control signal @C when the termination signal is received. 6 is a test switch, which is used when testing the operation of the emergency warning broadcast receiver. 5
is a memory circuit whose output Q is connected to the base of the transistor 7 via a resistor, and controls the display element 8 connected to the reference.

When the user presses the test switch 6 on the day when the emergency broadcast test signal is scheduled to be sent out, the memory circuit 5 is set.
The base of the transistor 7 becomes "high" level, and the display element 8 lights up white. Thereafter, a test signal for emergency warning broadcasting is broadcast, and when the receiver operates normally, a control signal C is output, which is inverted by an inverting circuit 4 to reset the memory circuit 5 and turn off the display element 8.

Problems to be Solved by the Invention This conventional configuration has the following problems. In other words, the end signal is emitted periodically (for example, at intervals of one month), and as shown in FIG. 2, the test switch 6 is operated at date and time a before the first end signal is emitted. In this case, the display element 8 is in a lighting state until the first end signal is normally received, and the display element 8 is in a lighting state after receiving the first end signal. Immediately after receiving the first end signal, the user checks the lighting state of the display element 8, and if it is off, it can be confirmed that the receiver is operating normally. However, at a date and time before the second end signal is emitted, the test switch 6
If you forget to perform this operation, if you read the off state of the display element 8 at date and time C immediately after receiving the second completion signal without knowing that the test set execution at the date and time has not been completed, the date and time will change. Although the display element 8 is displaying the result of the first termination signal emission test at C,
One would assume that the test result at the latest end signal emission point (in this case, the second end signal emission point) is normal and ignore it.

The purpose of this invention is to provide an emergency broadcast receiver equipped with a test circuit that can clearly determine whether the test result at the time of the latest termination signal emission is normal or whether the test set has been forgotten.

Means for Solving the Problems The emergency broadcast receiver of the present invention includes a self-recovery switch for instructing execution of a reception test, and a first reset switch that is turned off when an emergency warning broadcast end signal is detected and reset by operation of the self-return switch. 1 storage means, a second storage means set by the operation of the self-resetting switch, a first state in which the second storage means is set and the first storage means is reset; a display control means for changing the display mode of the first display element in a second state in which the second storage means are both in the set state; The present invention is characterized in that it includes a timer means that starts counting when the memory means is set, and a second display element whose display mode changes before and after the timer means detects the passage of a specified time.

Effect: Because of this configuration, the first. By reading the test results using the combination of the display modes of the second display element, you can know that the test execution instruction state was entered and what the results were, and the previous test results can be updated to the latest test results. It can be determined whether the emergency warning broadcast receiver is operating normally or not, and it can be correctly determined whether the emergency warning broadcast receiver is operating normally.

EXAMPLE An example of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 shows a test circuit section of an emergency warning broadcast receiver according to the present invention. 1 is an FSK demodulation circuit, 2 is a start signal determination circuit, and 3 is an end signal determination circuit, which have the same configuration as that shown in FIG. Reference numeral 15 is a self-return type push button switch for instructing execution of the reception test, and reference numeral 16 is a self return type push button switch which is operated after confirming the result of the reception test. Reference numeral 11 denotes a first memory circuit, which is reset by a switch 16 and set by a control signal C from the end signal discrimination circuit 3. 12 is a second memory circuit, which is turned on by switch 15 and turned on by switch 16.
will be reset. 13 is a display control circuit;
It is controlled by the outputs of the memory circuits 11 and 12 and E. 18 is a timer circuit whose operation is started by D;
At the end of the specified time h1, a signal G is output. The timer circuit 18 is initialized by the signal ``.The prescribed time of the timer circuit 18 is shorter than the termination signal emission interval. Here, if the termination signal emission interval is one month, the prescribed time is 2.
It is set to 4 hours. 17 is an OR circuit, and 14 is a third memory circuit, which is set by a signal G from a timer circuit 18 and reset by a switch 15.degree. 1G. The output terminal 1 of the display control circuit 13 is connected to the base of a transistor 19, and the collector thereof is connected to the first display element 20. The output (2) of the third memory circuit 14 is connected to the base of the transistor 22, and the collector thereof is connected to the second display element 21.

With this configuration, when the user presses the switch 15 to enter the test mode, the first memory circuit 11 is reset and the second memory circuit 12 is set via the OR circuit 17. As a result, the output F becomes a "low" level and the F becomes a "high" level.

Under this condition, the display control circuit 13 sets the output 1 to the "high" level, and the first display element 20 lights up continuously.
At this time, the timer circuit 18 is set to an initial value. The output signal G of the timer circuit 18 is at a "low" level, the output ■ of the memory circuit 14 is at a "low" level, and the second display element 21 is off.A test broadcast is transmitted from the broadcasting station, and an emergency When the alarm broadcast receiver operates normally and the termination signal, which is a test signal, is correctly received, the first memory circuit 11 is set and its output becomes a "high" level. When the output becomes a "high" level and E becomes a "high" level, the output H of the display control circuit 13 becomes a 1 Hz intermittent signal of "high" level and "low" level, and the first display element 20 blinks. When the output signal reaches the "high" level, the timer circuit 18 starts timekeeping operation, and when it detects that the prescribed time of 24 hours has elapsed, the output voltage G becomes the "high" level, and the third memory circuit 14 is set. The second display element 21 lights up.The second display element 21 remains off until the elapse of 24 hours is detected.When the receiving circuit does not operate normally, the display element 20 lights up until the light is on. be.

FIG. 2 shows the operation of FIG. 1. When the switch 15 is operated at a date and time a before the first end signal emission time, the first display element 20 lights up continuously. When the first end signal is normally received, the first display element 20 enters a blinking state. Thereafter, when the timer circuit 18 detects that 24 hours have elapsed, the second display element 21 is reversed from the unlit state to the on state.

Here, if you forget to operate the switch 15 at a date and time before the second termination signal issuance date and time, the test results from the second termination signal will be displayed at date and time C after the second termination signal issuance. Even when I try to read it, the second display element 21 is lit! It is possible to recognize that the test result for which the display element 20 of I11 blinks to notify that it is normal is not the latest test result but the first test result, and it is possible to avoid reading incorrect test results. It can be prevented. In addition, if the normal test result is based on the latest end signal, the date and time d will be changed only for 24 hours immediately after receiving the end signal.
As shown in , the first display element 20 is blinking and the second display element 21 is off, so that it can be clearly distinguished from the state of J at date and time C.

As described in the detailed description of the invention, the emergency warning broadcasting receiver of the present invention is provided with a first display element whose display mode changes depending on whether the test result is pass or fail, so that it is possible to read that the test set execution instruction state is given. In addition, since the first display element is provided with a second display element whose display mode changes according to the output of a timer circuit that starts counting when the output of the first storage means reaches a test passing state and detects the passage of a specified time, ．． By combining the display modes of the second display element, it can be determined whether the test result display is based on the latest end signal, and it is possible to prevent incorrect reading of test results.

[Brief explanation of drawings]

FIG. 1 is a block diagram of one embodiment of the present invention, and FIG. 2 is a block diagram of an embodiment of the present invention.
In the figure, whether or not the test set is executed, the end signal, and the first. A diagram explaining the display state of the second display element, FIG. 3 is a diagram showing the main part configuration of a conventional emergency warning broadcast receiver, and FIG. 4 is a diagram explaining the display state of the conventional test set execution/execution, end signal, and display element. It is. 3... End @ determination circuit, 11... First memory circuit, 12... Second memory circuit 7.13... Display control circuit, 14... Third memory circuit j115 ...Push button switch for instructing reception test execution, 16...Push button switch for rehitting, 18...Timer circuit, 20...First display element, 21...Second display element agent Morimoto Yoshihiro 1st figure 15-14g test real 'j''rje&m11p4D
"I-1z0-...FuII) display, elementary J zt--82, &hydrogen CH Fig. 2 Fig. J

Claims (1)

[Claims] 1. A self-recovery switch for instructing execution of a reception test; a first storage means that is set upon detection of an emergency warning broadcast end signal and reset by the operation of the self-recovery switch; and a second storage means that is set when the second storage means is set.
display control means for changing the display mode of the first display element between a first state in which the storage means is in a reset state and a second state in which both the first and second storage means are in a set state;
The specified time is shorter than the emission interval of the end signal and the first
An emergency warning broadcast receiver comprising: a timer means that starts counting when the memory means is set; and a second display element whose display mode changes before and after the timer means detects the passage of a specified time.