JPS5937919Y2 - Transmission monitor recorder - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a monitor recorder for transmission such as a telephone transmission device that automatically records biological signals such as an electrocardiogram.

In recent years, terminals that transmit biological signals such as electrocardiograms have been placed in remote clinics and small clinics where there are no specialists, and these terminals are connected to terminals at large hospitals where specialists are stationed using telephone lines. Finally, telephone transmission devices are becoming popular, which enable accurate treatment by transmitting a patient's biological signals to a large hospital for diagnosis by a specialist.

By the way, conventionally, when using this type of device to take monitor records, the monitor recorder of the telephone transmission device is turned on, and the operator watches the movement of the recorder's needle to transmit biological signals. After confirming this, the operator pressed the recording button to start the recording, and when the transmitted waveform was finished, the operator stopped recording on the monitor recorder.

Therefore, when recording waveforms, the operator must always be near the monitor recorder.

The present invention was created in view of the above circumstances, and utilizes the periodicity of the electrocardiogram signal in a fixed pattern to detect the R wave with an extremely large peak value and use it as a start signal, and from then on, this R wave is counted. To provide a telephone transmission monitor recorder capable of automatically recording several blocks of waveforms required for diagnosis by automatically stopping recording after the count value reaches a predetermined number. The purpose is to

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention,
In the figure, IN is an input terminal into which a biological signal is input, 1 is an amplifier that amplifies the signal applied to this input terminal IN, and SW is a recording switch provided between this amplifier 1 and the input terminal IN.

Reference numeral 2 designates a first switching circuit whose gate is opened by the output of a differential shaping circuit, which will be described later, and which is closed by the output of a counter, which will be described later, to control passage of the output of the amplifier 1; This is a galvanometer that moves a recording needle 3a in response to an output signal from an amplifier 1 inputted through a circuit 2.

4 is a differential shaping circuit that differentiates the output signal of the amplifier 1 and shapes the differential output of a predetermined level or higher to generate a pulse; 5
is a counter that counts the output pulses of the differential shaping circuit 4 and returns to the initial state and outputs a signal when a preset value is reached.

T is an electric motor which is driven by receiving current from a power source E and feeds a recording paper (not shown); and 6, a gate is opened by the output of the differential shaping circuit 4, and a gate is closed by the output of the counter, and the gate is This is a second switching circuit that opens and closes the power supply for the electric motor 6.

Note that while the switching circuit 2.6 is receiving the output from the counter 5, its gate is not opened even if the signals of the differential shaping circuit 4 are input, and the counter 5 is in the initial state. Assume that the output is output when

Next, the operation of this device will be explained.

As shown in Figure 2a, the electrocardiogram signals include P waves, Q waves, R waves, and S waves.
The signal is detected as a predetermined pattern of signals having different peak values in the order of wave, T wave, and U wave.

Assume that this signal is transmitted and applied to the input terminal IN.

In the initial state, the differential shaping circuit 4 has no output, and the counter 5 is reset to the initial state and outputs a signal.
The gates of each of the switching circuits 2 and 6 are held in the 1-closed 1-state.

Therefore, the galvanometer 3 and the electric motor 7 are in a non-operating state.

Next, when the recording switch SW is turned on, the transmitted electrocardiogram signal is input to the amplifier 1, where it is amplified and then
The signal is sent to the switching circuit 2 and the differential shaping circuit 4.

This differential shaping circuit 4 differentiates the input signal and shapes the waveform. At this time, if the threshold value of the signal to be output after waveform shaping is appropriately set in accordance with the extremely high level R wave, this differential shaping circuit 4 When the R wave arrives, the shaping circuit 4
A pulse is generated as shown in the figure.

This pulse is applied to the switching circuits 2, 6 and also to the counter 5.

Then, this counter 5 counts this pulse, and as a result, the output of the counter 5 disappears.

Therefore, the switching circuits 2 and 6 are unlocked by the signal from the counter 5, and the gates are opened in response to the output of the differential shaping circuit 4.

When the gates of the switching circuits 2 and 6 are opened, the output of the amplifier 1 passes through the first switching circuit 2 and is applied to the galvanometer 3, which in turn
Shake a in response to the input signal.

On the other hand, power is supplied from the power source E to the electric motor T through the second switching circuit 6, and the electric motor 7 rotates to feed out recording paper (not shown).

As a result, the movement of the recording needle 3a is recorded on the recording paper.

When the count value of the counter 5 reaches a predetermined count value, the counter 5 outputs an output, and the output of the counter 5 is applied to the switching circuits 2 and 6.

Then, the gates of these switching circuits 2 and 6 are closed by the signal from the counter 5.

As a result, the electric motor 7 stops, and the galvanometer 3 also stops its operation because there is no input, and the recording is completed.

Therefore, either the recording switch SW is held by the power supplied to the electric motor 7 through the switching circuit 6, or the recording switch SW is turned off by the output of the counter 5, or once the counter 5 finishes counting. After returning to the initial state, if measures are taken such as not re-counting unless the operator gives a command, the device will automatically start counting when the electrocardiogram for a predetermined number of heartbeats is recorded. Since the recording is completed by stopping at a certain point, there is no need for the operator to operate the recorder all the time.

In addition, when you want to stop recording in the middle of recording, this device
All you have to do is turn the recording switch SW "OFF", but if you stop recording midway through, when you turn the skewer switch SW "ON" again, or @OFF.
It is necessary to configure the counter 5 so that it returns to the initial state when operated.

In addition, in case the ECG signal is not input for a predetermined number of heartbeats and the transmission is stopped, a timer that is reset by the pulse of the differential shaping circuit is set. If the timer is not reset within the predetermined time, the timer will stop recording. It's a good idea to let them do it.

In this way, there is a differential shaping circuit that differentiates the input signal and shapes the waveform, a counter that counts the output pulses of this differential shaping circuit and outputs a signal when it reaches a predetermined value, and a gate that turns OFF by the output of this counter. After the output of the counter disappears and the output of the differential shaping circuit is received, the gate is turned on using first and second switching circuits. In addition to supplying the signal, power is also supplied to an electric motor that sends the recording paper through a second switching circuit, and the differential shaping circuit shapes and outputs a waveform of an input above a predetermined threshold f. As a result, when an electrocardiogram signal is input, recording is automatically started using the R wave with a high peak value, and from then on, each time this R wave arrives, the counter counts it to reach a predetermined heart rate. Recording can be stopped automatically when the limit is reached.

Therefore, by turning on the recording switch, the electrocardiogram signal transmitted from a remote location at any time can be automatically recorded for a predetermined amount of heartbeats necessary for a preset diagnosis. This eliminates the need for the operator to constantly monitor the system as in the past, which has the advantage of saving labor.

It should be noted that the present invention is not limited to the embodiments described above and shown in the drawings, but can be implemented with appropriate modifications within the scope of the gist, and the recording target is not limited to electrocardiograms but also other biological It can also be applied to automatic recording of information.

As detailed above, according to the present invention, a transmission monitor has excellent features such as being able to automatically record a predetermined amount of biological information sent from a remote location at any time, thereby saving labor. A recorder can be provided.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a time chart of the differential shaping circuit. 2.6...Switching circuit, 3...
Galvanometer, 4... Differential shaping circuit, 5...
...Counter, 7...Electric motor that feeds the recording paper, SW...Recording switch, E...Power supply.

Claims (1)

[Scope of utility model registration request] An input terminal that receives an input signal of a predetermined pattern including a specific wave with a high peak value, and an input terminal that is connected to the input terminal and has a level higher than a predetermined threshold in order to differentiate the input signal and detect only the specific wave. a differential shaping circuit that shapes and outputs a waveform of the differential shaping circuit; a counter connected to the output terminal of the differential shaping circuit that counts the output pulses and outputs a control signal when a predetermined count value is reached; two control terminals are respectively connected to an output terminal and an output terminal of the counter, and first and second switching circuits are turned on by an output pulse of a differential shaping circuit and turned off by a control signal of the counter; A galvanometer for recording an input signal is connected to the input terminal via the first switching circuit, and a galvanometer for feeding the recording paper is connected to a power source via the second switching circuit and is supplied with the power. A transmission monitor recorder comprising an electric motor.