JPH06169355A - Data terminal device - Google Patents

Abstract

PURPOSE:To provide the data terminal device having its power source part started up with a call signal with an automatic power source startup function and to reduce the size and power consumption. CONSTITUTION:This data terminal device is equipped with the power source part 2 which applies a data processing part 1 with the voltage generated by rectifying the AC voltage of a commercial power source by a rectifying and smoothing part 12 and stabilizing it by a stabilizing part 13 and a power source remote control part 3, and the power source remote control part 3 has a detection part 4 which detects the call signal passed through a telephone line and a control signal transmission part 7 which sends out a control signal for controlling the power source part 2 based on the detection signal of the detection part 4 and the control signal transmission part 7 has a capacitor 6 which is charged with a fine leak current from the rectifying and smoothing part 12, etc., of the power source part 2 through a power source control signal line 5 and a transistor 8 which sends out the control signal for controlling the power source part 2 to a power source control signal line 5 based on the detection signal of the call signal by a photocoupler 10 by using the charging voltage of the capacitor 6 as an operating voltage.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data terminal device activated by a call signal from a center via a telephone line. Data that stores data processed in the daytime in the data terminal device, and activates the terminal device from the center via the telephone line at night and sends the stored data to the center via the telephone line. A collection system is known, and data can be collected using a time zone of a low communication charge such as a late-night charge. It is desired to realize the activation of the data terminal device in such a data collection system with an economical structure.

[0002]

2. Description of the Related Art A data terminal device of a conventional data collection system has, for example, the configuration shown in FIG. 9, in which 61 is a data terminal device, 62 is an automatic power supply startup device,
63 is a data processing unit, 64 is a modem, 65 is a stabilized power supply unit, 66 is a power supply control unit, and 67 is a stabilized power supply unit. The stabilized power supply units 65 and 67 are, for example, 100 AC commercial power supplies.
V is supplied, and the stabilized power supply unit 6 of the automatic power supply startup device 62 is supplied.
7 always supplies the stabilized voltage to the power supply control unit 66, but the stabilized power supply unit 65 of the data terminal device 61 is activated by the control signal from the power supply control unit 66 of the automatic power supply startup device 62.

A modem 64 of the data terminal device 61 and a power supply control unit 66 of the automatic power supply startup device 62 are connected to the telephone line, and the power supply control unit 66 is supplied with an operating voltage from the stabilized power supply unit 67. Therefore, a call signal from the center via the telephone line is detected, and a control signal for activating the stabilized power supply unit 65 of the data terminal device 61 is added. As a result, the stabilized power supply unit 65 of the data terminal device 61 stabilizes and supplies the operating voltage of each unit based on the AC commercial power supply of 100 V, and the modem 6 operates under the control of the data processing device 63.
Data is transmitted and received between the center and the center 4 via the telephone line.

[0004]

Data terminal device 61
For example, when the daytime data processing work is completed, the switch of the stabilized power supply unit 65 is turned off. Therefore, the stabilized power supply unit 67 of the automatic power supply startup device 62 forms and supplies the operating voltage of the power supply control unit 66 based on 100V of the AC commercial power supply, and detects the ringing signal from the center via the telephone line. However, the provision of the automatic power supply start-up device 62, which is separate from the data terminal device 61, causes space and economical problems. Therefore, this automatic power supply startup device 6
2 may be integrated with the data terminal device 61, but since the automatic power supply startup device 62 has a relatively large configuration, it is difficult to realize because the data terminal device 61 becomes large. . Further, it is conceivable to reduce the size by sharing the stabilizing power supply units 65 and 67, but in that case, the stabilizing power supply unit of the data terminal device 61 needs to be kept in an operating state at all times, and power consumption, etc. The problem of will occur. Further, it is necessary to prevent malfunction due to noise or the like applied via the telephone line. SUMMARY OF THE INVENTION It is an object of the present invention to provide a data terminal device with an automatic power-on function and to reduce the size and power consumption.

[0005]

The data terminal device of the present invention will be described with reference to FIG. 1. The data terminal device rectifies the AC voltage of an AC commercial power source and supplies a stabilized voltage to each part such as the data processing part 1. In a data terminal device having a power supply unit 2 and a power supply remote control unit 3 for detecting a calling signal from a center via a telephone line and switching the power supply unit 2 to an operating state, a power supply remote control unit 3 Is a detection unit 4 for detecting a calling signal.
And the power supply control signal line 5 based on the detection signal of the detection unit 4 with the charging voltage of the capacitor 6 charged by the minute leakage current flowing from the power supply unit 2 via the power supply control signal line 5 as the operating voltage.
And a control signal transmission unit 7 for transmitting a control signal for switching the power supply unit 2 to the operating state via the. The data processing unit 1 includes a modem 15 and a processor 16, and a power supply unit 2
Includes a rectifying / smoothing unit 12, a stabilizing unit 13 by switching control, and a photocoupler 14 connected to the power supply control signal line 5, and a detecting unit 4 of the power supply remote control unit 3 includes a photocoupler 10 connected to a telephone line. Including a control signal transmission unit 7
Includes a transistor 8, a capacitor 9 and the like.

Further, the control signal transmission unit 7 of the power source remote control unit 3
Is an integrating circuit that integrates according to the detection signal of the detection unit 4,
A holding and charging transistor that turns on when the output voltage of this integrating circuit exceeds a specified value to charge the holding capacitor, and a power control signal line that turns on when the charging voltage of the holding capacitor exceeds a specified value. 5, a control signal transmitting transistor for transmitting a control signal, and a reset transistor that is turned on by a reset signal from the data processing unit 1 to discharge the holding capacitor.

Further, the control signal transmission section 7 of the power source remote control section 3
Is a capacitor 6 that is charged by a minute leak current from the power supply unit 2 that is not operating via the power supply control signal line 5 and that is charged from the power supply unit 2 that is operating via the diode 11.
And a transistor 8 for performing operation / non-operation toggle control of the power supply unit 2 via the power supply control signal line 5 based on the detection signal of the detection unit 4 with the charging voltage of the capacitor 6 as an operating voltage.
And a switch circuit for controlling the transistor 8 so as not to operate even by the detection signal of the detection unit 4 while the data processing unit 1 is operating.

A control signal transmission section 7 of the power source remote control section 3
After sending a control signal for operating the power supply unit 2 via the power supply control signal line 5 based on the detection signal of the detection unit 4, the initial program loading process of the data processing unit 1 is performed by the operating voltage from the power supply unit 2. The power supply unit 2 is provided with an abnormality determination unit that switches the power supply unit 2 to a non-operating state when the operation is not normally terminated.

[0009]

In the invention of claim 1, the data terminal device is
The data processing unit 1, the power supply unit 2, and the power supply remote control unit 3 are integrally provided with the power supply remote control unit 3 for operating the power supply unit 2 in response to a calling signal. The capacitor 6 of the control signal sending unit 7 of the power source remote control unit 3 is charged by the minute leakage current from the power source unit 2. Power supply 2
For example, the rectifying / smoothing unit 12 is connected to an AC commercial power source, and the stabilizing unit 13 having the same configuration as the switching regulator starts the switching operation when the photocoupler 14 is turned on, and the stabilizing voltage is applied to each unit. The minute leakage current flows through the rectifier of the rectifying / smoothing unit 12 even when the power supply unit 2 in which the stabilizing unit 13 is not performing the switching operation is in operation. Leakage current will be applied to the capacitor 6 via the power supply control signal line 5. In this case, the light emitting diode of the photocoupler 14 is connected to the power supply control signal line 5, but when a relay or the like is connected to the power supply control signal line 5,
A minute leakage current is applied to the capacitor 6 via the relay or the like.

When a call signal from the center is applied via the telephone line, the light emitting diode of the photocoupler 10 emits light and the phototransistor is turned on. As a result, the charging voltage of the capacitor 6 is applied to the base of the transistor 8 and turned on, and the power supply control signal line 5 becomes low level, so that the light emitting diode of the photocoupler 14 emits light and the phototransistor turns on. The detection of this ringing signal is
It is also possible to use a configuration such as a relay other than the photocoupler 10.

When the phototransistor of the photocoupler 10 is turned on, the stabilizing operation of the stabilizing section 13 of the power supply section 2 is started and a stabilizing voltage is output, and the data processing section 1 communicates with the center via the modem 15. Data can be sent and received. Although the ringing signal is intermittent, the capacitor 9 can maintain the transistor 8 in the ON state during the intermittent period of the ringing signal. When the calling signal disappears, the transistor 8 is turned off, and the power supply unit 2 performs the operation / non-operation toggle control every time the calling signal is applied. In the case where the switching operation of the stabilizing unit 13 is performed only while the phototransistor of the photocoupler 14 is in the ON state, the ON state of the transistor 8 is maintained by the stabilizing voltage from the power supply unit 2, It can be configured to be turned off by a reset signal or the like from the processing unit 1.

According to the invention of claim 2, in accordance with the detection signal detected by the detection unit 4 of the power source remote control unit 3, the charging voltage of the capacitor 6 is used as an operating voltage to perform an integration operation, and the integrated output thereof. When the voltage exceeds a predetermined value, the holding charging transistor is turned on to charge the holding capacitor, and the control signal sending transistor that sends the control signal to the power supply control signal line 5 is turned on by the charging voltage of the holding capacitor, For example, the light emitting diode of the photocoupler 14 is continuously made to emit light, and the phototransistor is kept in the ON state, whereby the stabilizing operation of the stabilizing unit 13 of the power supply unit 2 is continued and the stabilized voltage is output. Therefore, malfunction due to noise can be prevented, and even after the calling signal is detected, the power supply unit 2 can be brought into the operating state even if the calling signal is somewhat unstable. Further, the data processing unit 1 sends a reset signal by power-on reset, discharges the holding capacitor, turns off the control signal sending transistor, and when the next call signal is detected,
The control signal sending transistor is turned on to switch the power supply unit 2 to the non-operating state.

In the third aspect of the invention, the transistor 8 of the control signal transmitting section 7 of the power source remote control section 3 is turned on when a call signal from the center is applied via the telephone line, and the call signal is changed. When it is no longer applied, the transistor 8 is turned off, and the power supply control signal line 5 becomes low level upon detection of the calling signal. Since the stabilizing unit 13 of the power supply unit 2 has a configuration for performing toggle control of operation / non-operation of the power supply unit 2 by starting / stopping the switching operation, the data processing unit 1 is set with the power supply unit 2 in an operating state. Thus, for example, when noise or the like is erroneously detected as a calling signal while transmitting / receiving data to / from the center, the power supply unit 2 is switched to the non-operating state. However, until the processing of the data processing unit is completed, the switch circuit is controlled so that the transistor 8 is not turned on by the detection signal of the detection unit 4. Therefore, the data processing unit 1
The operation of the power supply unit 2 does not stop during the operation of.

When the power supply unit 2 operates and the stabilizing voltage is supplied to the data processing unit 1, the data processing unit 1 performs an initial program loading (IPL) process. If this IPL is not performed normally, it is impossible to stop the data transmission / reception process and the operation of the power supply unit 2. Therefore, when the abnormality determining unit determines that the IPL of the data processing unit 1 does not end normally, the switching operation of the stabilizing unit 13 of the power supply unit 2 is forcibly stopped. As a result, the stabilizing voltage is not supplied to the data processing unit 1, so that the operation is stopped and the re-call signal from the center side is awaited.

[0015]

2 is an explanatory view of a first embodiment of the present invention, in which 21 is a data processing unit, 22 is a power supply unit, 23 is a power supply remote control unit, 24 is a memory (MEM), and 25 is a modem ( M
OD), 26 is a processor (CPU), 27 is a power supply filter, 28 is a rectifying / smoothing circuit, 29 is a stabilizing unit, 30 is a switching control unit, 31 is a power supply control signal line, Q1 is a transistor, C1 to C3 are capacitors, R1 to R6 are resistors, PC1 and PC2 are photocouplers, D1 and D2 are diodes, AC100V is AC 100V of an AC commercial power source, and TEL is a telephone line.

The data processing unit 21 includes a memory 24 for storing data and a modem 25 connected to the telephone line TEL.
The power supply unit 22 includes a power supply filter 27, a rectifying / smoothing circuit 28, a stabilizing unit 29 that outputs a stabilizing voltage by a switching operation, and a switching unit that controls the switching operation. The control unit 30 and the photocoupler PC2 connected to the power supply control signal line 31 are included. In addition, the power source remote control unit 2
3 is a detector including a capacitor C3, a resistor R5, a diode D2, and a photocoupler PC1, and capacitors C1 and C.
2, transistor Q1, resistors R1 to R4, diode D
1 and a control signal transmission unit including 1.

The power supply unit 22 is in an operating state in which it outputs a stabilizing voltage by controlling the switching operation of the stabilizing unit 29 by the switching control unit 30, and in the non-operating state, the stabilizing unit is in operation. Since the switching operation of 29 is not performed, the load side of the rectifying / smoothing circuit 28 is in an open state and no rectifying current flows. However, since the rectifying / smoothing circuit 28 is connected to the AC commercial power supply via the power supply filter 27, a minute leakage current flows through the rectifier or the like. This minute leakage current is
6, the capacitor C1 is charged via the light emitting diode of the photocoupler PC2 and the resistor R1. In this case, the current is so small that the light emitting diode does not emit light.

Further, through the telephone line TEL, for example, 75
A calling signal of V, 16 Hz for 1 second on and 2 seconds off is applied. When the calling signal is the forward voltage of the light emitting diode of the photocoupler PC1, a current flows through the light emitting diode to emit light, and a reverse voltage of Sometimes it will flow through diode D2. It is also possible to provide a photocoupler in which this diode D2 is also a light emitting diode, or to rectify the calling signal by a full-wave rectifier circuit and add it to the light emitting diode of the photocoupler PC1, but the number of parts increases. When the light emitting diode emits light, the phototransistor turns on, the charging voltage of the capacitor C1 is applied to the capacitor C2 via the resistor R2 and the phototransistor, and the phototransistor turns on and off in response to the call signal of 16 Hz. The capacitor C2 is turned on and off according to the intermittent cycle of second on and second off, and the capacitor C2 is charged during the on period. The terminal voltage of the capacitor C2 is divided by the resistors R3 and R4 and added to the base of the transistor Q1,
When the voltage becomes equal to or higher than the predetermined base potential, the transistor Q1 turns on.

When the transistor Q1 is turned on, the power supply control signal line 31 becomes low level, the current from the rectifying / smoothing circuit 28 flows through the light emitting diode of the photocoupler PC2 via the resistor R6, and the light emitting diode emits light. As a result, the phototransistor is turned on, the switching control unit 30 starts the switching operation of the stabilizing unit 29, and the output voltage of the rectifying / smoothing circuit 28 is stabilized by the stabilizing unit 29 and applied to the data processing unit 21. . The output voltage of the stabilizing unit 29 is applied to the capacitor C1 via the diode D1. In this state, when the ringing signal is applied again, the transistor Q1 is turned on and the phototransistor of the photocoupler PC2 is turned on by using the terminal voltage of the capacitor C1 charged through the diode D1 as an operating voltage. The switching control unit 30 stops the switching operation of the stabilizing unit 29 by the control mechanism. That is, the power supply unit 22 is switched to the non-operating state.

FIG. 3 is a diagram for explaining the operation of the first embodiment of the present invention. (A) is the terminal voltage of the capacitor C1, (b) is the ringing signal, (c) is the terminal voltage of the capacitor C2, and (d). )
Shows a control signal sent to the power supply control signal line 31, and (e) shows an example of the stabilization voltage of the power supply unit 22. When the power supply unit 22 of the data terminal device is connected to an outlet of a 100V AC commercial power supply, a minute leakage current via the rectifier of the rectifying and smoothing circuit 28 flows into the capacitor C1 and is charged.
As shown in (a), the terminal voltage of the capacitor C1 rises. Further, the power supply control signal line 31 becomes high level as shown in (d) so as to charge the capacitor C1.

The calling signal shown in FIG. 3B is the telephone line T.
When applied through EL, the phototransistor of the photocoupler PC1 is turned on, the terminal voltage of the capacitor C1 is applied to the capacitor C2, the terminal voltage of the capacitor C2 rises as shown in (c), and reaches the threshold value Vth1.
The transistor Q1 is turned on, and the power supply control signal line 31 becomes low level as shown in (d). Thereby,
The switching operation of the stabilizing unit 29 is started, and (e)
The stabilized voltage is output as shown in FIG.
Added to 1. Further, since the capacitor C1 is charged through the diode D1, the terminal voltage of the capacitor C1 also rises as shown in (a).

Therefore, the data terminal device can be activated in response to a call from the center without providing a power supply for detecting the call signal and switching the power supply unit 22 to the operating state. When the ringing signal is no longer applied, the capacitor C2 is discharged through the resistors R3 and R4,
Since its terminal voltage drops, the transistor Q1 turns off. As a result, the power supply control signal line 31 becomes high level, and the phototransistor of the photocoupler PC2 is turned off. Next, when the ringing signal is detected, the transistor Q
When 1 is turned on and the phototransistor of the photocoupler PC2 is also turned on, the switching control unit 30
Since the switching control of the stabilizing unit 29 is stopped, the power supply unit 22 is switched to the non-operating state. Alternatively, by controlling the transistor Q1 to be turned on by a data processing end signal or the like from the data processing unit 21, the power supply unit 2
2 can be switched to the inactive state.

FIG. 4 is an explanatory view of the essential parts of the second embodiment of the present invention, in which the same reference numerals as those in FIG. 2 indicate the same parts, and R7 to R1.
0 is a resistor, Q2-Q5 are transistors, C4 is a capacitor, D3 is a diode, ZD is a zener diode, *
RST is an inverted reset signal. The detector connected to the telephone line TEL for detecting the ringing signal is composed of the capacitor C3, the resistor R5, the diode D2 and the photocoupler PC1 as in the above-mentioned embodiment, and the control signal transmitter is composed of the capacitors C1 and C2. , C4, transistor Q1
This is a configuration including Q5 and the like. Also, capacitor C2 and resistor R7
Form an integrating circuit, C4 is a holding capacitor, Q
Reference numeral 4 is a holding and charging transistor, Q1 is a control signal sending transistor, and Q5 is a reset transistor.

As in the previous embodiment, the capacitor C1
Is charged by a minute leakage current from the power supply unit 22 via the power supply control signal line. That is, resistor R6, photocoupler PC
It is charged through the second light emitting diode, the diode D3 and the resistor R1. The minute leak current at this time is due to the photocoupler P.
The light emitting diode of C2 is a minute current that does not emit light. When a calling signal is applied via the telephone line TEL, the phototransistor of the photocoupler PC1 is turned on, the charging voltage of the capacitor C1 is applied to the capacitor C2, and the calling is performed by the integrating circuit composed of the capacitor C2 and the resistor R7. The 16 Hz half-wave detection signal of the signal will be integrated. When the output voltage of the integrating circuit, that is, the terminal voltage of the capacitor C2 exceeds the Zener voltage of the Zener diode ZD, the transistor Q2 is turned on.

When the transistor Q2 is turned on, the transistor Q4 is turned on and the capacitor C4 is rapidly charged by the charging voltage of the capacitor C1.
3 is also turned on. When the terminal voltage of the capacitor C4 rapidly rises and exceeds a predetermined value, the transistor Q1 turns on, the power supply control signal line goes low, the light emitting diode of the photocoupler PC1 emits light, and the phototransistor turns on. The power supply unit 22 starts operating.

At this time, after the transistor Q2 is turned on, even if the transistor Q2 is turned off due to an unstable calling signal or some other reason, when the transistors Q3 and Q4 are turned on, the capacitor C4 is turned on. Since the charging is continued, the transistor Q1 can be turned on. Then, when the power supply unit 22 is in the operating state and the stabilizing voltage is applied to the data processing unit, the data processing unit sets the inverted reset signal * RST to "1" by the power-on reset operation. This turns on transistor Q5,
The holding capacitor C4 is discharged through the resistor R10, which turns off the transistor Q1 and returns to the initial state. When the power supply unit 22 is operating, the capacitor C1 is connected via the diode D1.
Is charged, and an operating voltage for performing a detection operation of a calling signal for switching the power supply unit 22 to the non-operating state is supplied.

FIG. 5 is a diagram for explaining the operation of the second embodiment of the present invention. (A) is the terminal voltage of the capacitor C1, (b) is the ringing signal, (c) is the terminal voltage of the capacitor C2, and (d). )
Is the terminal voltage of the capacitor C4, (e) is the control signal of the power supply control signal line, (f) is the output stabilization voltage of the power supply unit 22,
(G) shows an example of the inverted reset signal * RST.

By connecting the power source unit 22 of the data terminal device to the AC commercial power source, the capacitor C1 is charged by the minute leakage current, and the terminal voltage gradually rises, as shown in (a). The control signal of the power supply control signal line is
As shown in (e), it becomes high level. When the calling signal is applied as shown in (b), the phototransistor of the photocoupler PC1 is turned on and off according to the frequency of the calling signal, and the terminal voltage of the capacitor C1 forming the integrating circuit is as shown in (c). To rise.

[0029] When more than Zener voltage V _ZD of the Zener diode ZD, the transistor Q2 is turned on, since the transistor Q4 is also turned on, the capacitor C
The terminal voltage of 4 rises as shown in FIG.
When it exceeds 2, the transistor Q1 is turned on, the control signal of the power supply control signal line becomes low level as shown in (e), and the phototransistor of the photocoupler PC2 is turned on to turn on the phototransistor to turn on the phototransistor. The operation is started. Therefore, the power supply unit 22 outputs the stabilized voltage as shown in (f). Then, a stabilizing voltage is applied from the power supply unit 22 via the diode D1, and the capacitor C1 is charged, and at the same time, the capacitor C4 is charged via the transistor Q4, and the terminal voltage holds the transistor Q1 in the ON state.

When the stabilizing voltage is supplied to the data processing unit, the data processing unit performs power-on reset processing. As a result, the inverted reset signal * RST becomes "1" as shown in (g) of FIG.
Turns on and discharges the holding capacitor C4 through the resistor R10. Therefore, the terminal voltage of the capacitor C4 decreases as shown in (d), and when the voltage becomes equal to or lower than the threshold value Vth2, the transistor Q1 turns off and the control signal of the power supply control signal line becomes high level as shown in (e).
It will return to the initial state.

When noise NS is added through the telephone line TEL, the light emitting diode of the photocoupler PC1 emits light, the phototransistor is turned on, and the capacitor C1 is turned on.
However, since the terminal voltage of the capacitor C2 forming the integrating circuit does not exceed the Zener voltage V _ZD , the transistor Q2 maintains the off state. That is, the capacitor C2 of the integrating circuit can prevent malfunction due to noise.

FIG. 6 is an explanatory view of the essential portions of the third embodiment of the present invention. The same reference numerals as those in FIGS.
Is an output interface unit (DO), PC3 is a normally-on photocoupler that constitutes a switch circuit, and R11 is a resistor. In this embodiment, a ringing signal applied via the telephone line TEL is detected, and the phototransistor of the photocoupler PC2 is turned on by using the terminal voltage of the capacitor C1 charged by the minute leakage current from the power supply unit 22 as the operating voltage. Then, since the photocoupler PC3 is normally on,
The capacitor C2 is charged from the capacitor C1 via the photocouplers PC1 and PC3, and the transistor Q1 is turned on by the terminal voltage.

When the transistor Q1 is turned on and the power supply control signal line is at a low level, the light emitting diode of the photocoupler PC2 emits light and the phototransistor is turned on, so that the power supply section 22 starts to operate and stabilizes the voltage. It is added to the data processing unit 21. Therefore, the data processing unit 21 starts data processing. In this case, when the ringing signal is not applied, the transistor Q1 turns off and the photocoupler PC
Although the second phototransistor is also turned off, since the power supply unit 22 has a toggle control mechanism, the operating state is continued until the transistor Q1 is turned on next time.

When the data processing unit 21 starts data processing with the stabilized voltage from the power supply unit 22, a low level control signal is output from the output interface unit 32, the light emitting diode of the photocoupler PC3 emits light, and the photocoupler P3.
C3 is turned off. Therefore, during data processing, even if a ringing signal or noise is added through the telephone line TEL and the light emitting diode of the photocoupler PC1 emits light, the photocoupler PC3 is in the off state, so that the transistor Q1 is not turned on. However, the power supply unit 22 can continue to operate.

FIG. 7 is an explanatory view of the essential parts of the fourth embodiment of the present invention, in which the same reference numerals as those in FIGS. 2 and 4 designate the same parts. Again 4
1, 43 are flip-flops, 42 is a counter, 44 is an OR circuit, 45 is an AND circuit, 46 is an inverter, R1
2 to R14 are resistors, Q6 and Q7 are transistors,
It constitutes an abnormality determination unit. RST is a reset signal,
* RST is an inverted reset signal, CLK is a clock signal,
IPLEND indicates an IPL end signal.

The capacitor C1 is used for the power supply unit 22 which is not operating.
From photocoupler PC2 light emitting diode, diode D
3, It is charged by a minute leakage current via the resistor R1.
Then, the call signal is applied via the telephone line TEL to charge the capacitor C2 forming the integrating circuit, and when the Zener voltage of the Zener diode ZD is exceeded, the transistor Q2 is turned on, whereby the transistors Q4 and Q3 are turned on. Is turned on, the capacitor C4 is charged, and when the charged voltage reaches a predetermined value, the transistor Q1 is turned on and the power supply unit 22 is activated.
Such a configuration and operation are similar to those of the embodiment shown in FIG.

When the transistor Q1 is turned on,
The transistor Q6 also turns on. Therefore, "0" is added to the data terminal D of the flip-flop 41. Then, when the power supply unit 22 starts to operate and the stabilizing voltage is applied to the data processing unit, the data processing unit causes the reset signal RST to be “0” (inverted reset signal * RST = “1”) by the process of power-on reset. ). Further, the clock signal CLK is added from the data processing unit, and the IPL processing is performed after the power-on reset.
LEND becomes "0" due to normal termination, and becomes "1" before that.

FIG. 8 is a diagram for explaining the operation of the fourth embodiment of the present invention. (A) is a calling signal, (b) is a terminal voltage of the capacitor C2, (c) is a terminal voltage of the capacitor C4, and (d). )
Is a control signal of the power supply control signal line, (e) is a stabilized voltage from the power supply unit 22, (f) is an inverted reset signal * RST,
(G) is an input signal of the data terminal D of the flip-flop 41, (h) is a signal of the output terminal Q of the flip-flop 41, (i) is a control signal applied to the control terminal CT of the counter 42, and (j) is the counter 42. Clock signal CLK applied to the clock terminal CK of the counter, (k) is the output signal of the output terminal Q of the counter 42, and (l) is the IPL end signal IPLE.
ND, (m) indicates the output signal of the output terminal Q of the flip-flop 43.

As shown in FIG. 8A, a calling signal is applied, and the output voltage of the integrating circuit composed of the capacitor C2 and the resistor R7, that is, the terminal voltage of the capacitor C2 rises as shown in FIG. 8B. , The transistors Q2, Q3, Q4 are turned on, the capacitor C4 is charged, its terminal voltage rises as shown in (c), and the transistor Q1 turns on, the control signal of the power supply control signal line changes. It goes low as shown in (d).

When the terminal voltage of the capacitor C4 rises, the transistor Q6 turns on. The collector of the transistor Q6 is applied with the terminal voltage of the capacitor C1, for example, via the resistor R13. In addition, the reverse reset * RST is in the state of "0", and the transistor Q
5 is kept off. When the transistor Q1 is turned on and the control signal of the power supply control signal line becomes low level, the power supply unit 22 is activated, and the stabilized voltage is output as shown in (e) to the data processing unit. Added.

A clock signal CLK is output from the data processing section, and at that time, the output terminal Q of the counter 42 is "0".
Therefore, the clock signal CL is supplied to the clock terminal CK of the counter 42 via the AND circuit 45 as shown in (j).
K is added. However, at that time, since the inverted reset signal * RST is “0” and the reset signal RST is “1”, the OR circuit 44 is connected to the control terminal CT of the counter 42.
A control signal of "1" is added via the
Has stopped counting.

The data processing unit performs a power-on reset process with a stabilizing voltage applied, and when the reset signal RST is set to "0" and the inverted reset signal * RST is set to "1", the control terminal CT of the counter 42 is connected. Is supplied with a control signal of "0" via the OR circuit 44, and the counter 42 starts counting the clock signal CLK applied to the clock terminal CK. At that time, the transistor Q5 is turned on to discharge the capacitor C4, but the transistor Q6 is turned off after a time T1 corresponding to the discharge time constant. That is, the data terminal D of the flip-flop 41
As shown in (g), the inverted reset signal * RST
"1" is added after T1 from the time when "1" becomes "1", and its output terminal Q remains "0".

This is because the power supply unit 22 is detected by detecting the calling signal.
Is the operating state, and the power supply unit 2 is manually operated.
When the transistor Q6 is in the operating state, the transistor Q6 continues to be in the off state. Therefore, when the inverted reset signal * RST by the power-on reset is applied, "1" is applied to the data terminal D of the flip-flop 41. Therefore, the output terminal Q becomes "1" as shown in (h), and the counter 42 does not count. That is, the flip-flop 41 has a function of storing whether or not the operation of the power supply unit 22 is started by the calling signal.

When the counter 42 counts the clock signal CLK and reaches a predetermined count content, the output terminal Q becomes "1" and the clock terminal C of the flip-flop 43.
When the signal is added to K and the IPL end signal IPLEND is "0" due to the normal end at that time, the output terminal Q of the flip-flop 43 remains "0" and the transistor Q7 is turned off. It becomes a state. Further, the counter 42 stops counting because the AND circuit 45 is closed and the clock signal CLK is not added to the clock terminal CK when the output terminal Q becomes "1".

If the IPL does not end normally within the predetermined time when the output terminal Q of the counter 42 becomes "1", the IPL
Since the end signal IPLEND remains "1", the output terminal Q of the flip-flop 43 becomes "1", the transistor Q7 is turned on, and the power supply is the same as when the transistor Q1 is turned on by the call signal detection. The control signal line is set to low level, the light emitting diode of the photocoupler PC2 is made to emit light, the phototransistor is turned on, and the power supply unit 2
Switch 2 to the non-operating state. That is, when the IPL does not end normally, the power supply unit 22 is forcibly switched to the non-operation state, and the stabilization voltage is not applied to the data processing unit from the power supply unit 22, so the flip-flops 41 and 43 and the counter 42 are initialized. It becomes a state.

The present invention is not limited to the above-described embodiments, and the logical configuration of each part may be another logical configuration, or may be integrated into a circuit including transistors. is there.

[0047]

As described above, according to the present invention, the data remote control unit 3 for activating the power supply unit 2 by the call signal via the telephone line TEL is integrated with the data processing unit 1 to form a data terminal device. Since the operating voltage in the power source remote control unit 3 is the terminal voltage of the capacitor 6 that is charged by using the minute leakage current of the power source unit 2 which is not operating, the power source unit which is always in the operating state. Therefore, there is an advantage that the power consumption can be reduced and the size can be reduced. Therefore, an economical data collection system can be constructed by applying the system to a system for collecting data by calling from the center through a telephone line to activate a data terminal device.

Further, an integrating circuit composed of the capacitor C2 and the resistor R7 integrates based on the detection signal of the calling signal,
When the integrated output voltage exceeds a predetermined value such as the Zener voltage of the Zener diode ZD, the transistors Q2, Q
3, Q4 is turned on to charge the holding capacitor C4, and when the terminal voltage of this capacitor C4 exceeds a predetermined value, the control signal sending transistor Q1 is turned on, and via the telephone line TEL. There are advantages that a malfunction due to added noise can be prevented and that the power supply unit can be reliably switched to the operating state by detection of a calling signal.

Further, during data processing in the data processing unit, a switch circuit such as a normally-on photocoupler PC3 is provided and controlled so that the transistor Q1 for transmitting the control signal is not turned on by the detection signal of the calling signal. However, there is an advantage that it is possible to surely prevent the operation of the power supply unit during data processing from being stopped due to an erroneous incoming call, noise, or the like applied via the telephone line TEL.

Further, when a stabilizing voltage is supplied from the power supply section which is activated by the calling signal and the data processing section through the operation performs the IPL processing and the IPL processing is not normally completed, the operation is forcibly performed. The normal operation of the data terminal device can be compensated by switching the power supply unit in the non-operation. Therefore, the reliability of collected data at the center can be improved.

[Brief description of drawings]

FIG. 1 is a diagram illustrating the principle of the present invention.

FIG. 2 is an explanatory diagram of the first embodiment of the present invention.

FIG. 3 is an operation explanatory diagram of the first embodiment of the present invention.

FIG. 4 is an explanatory view of a main part of a second embodiment of the present invention.

FIG. 5 is an operation explanatory diagram of the second embodiment of the present invention.

FIG. 6 is an explanatory view of a main part of a third embodiment of the present invention.

FIG. 7 is an explanatory view of a main part of a fourth embodiment of the present invention.

FIG. 8 is an operation explanatory diagram of the fourth embodiment of the present invention.

FIG. 9 is an explanatory diagram of a conventional example.

[Explanation of symbols]

 1 data processing unit 2 power supply unit 3 power supply remote control unit 4 detection unit 5 power supply control signal line 6 capacitor 7 control signal sending unit 8 transistor 9 capacitor 10, 14 photocoupler 11 diode 12 rectification smoothing unit 13 stabilizing unit 15 modem 16 processor

Claims (4)

[Claims] 1. A power supply unit (2) for rectifying an AC voltage of an AC commercial power supply to supply a stabilized voltage to each unit such as a data processing unit (1), and a ringing signal from a center via a telephone line is detected. And a power supply remote control unit (3) for controlling the power supply unit (2) to switch to an operating state, wherein the power supply remote control unit (3) detects the call signal. The operating voltage is the charging voltage of the part (4) and the capacitor (6) charged by the minute leakage current flowing from the power supply part (2) through the power supply control signal line (5), and the detection voltage of the detection part (4) is A data terminal comprising: a control signal transmission unit (7) for transmitting a control signal for switching the power supply unit (2) to an operating state through the power supply control signal line (5) based on a detection signal. apparatus. 2. The power supply remote control unit (3) sends a control signal to the power supply unit (2) via a detection unit (4) for detecting the ringing signal and the power supply control signal line (5). And a control signal sending section (7) for controlling the control signal sending section (7), the control signal sending section (7) integrating according to the detection signal of the detecting section (4), and the output voltage of the integrating circuit exceeding a predetermined value. A holding and charging transistor that is turned on when charging the holding capacitor, and a control that turns on when the charging voltage of the holding capacitor exceeds a predetermined value and sends a control signal to the power supply control signal line (5). The data terminal device according to claim 1, further comprising a signal transmitting transistor and a reset transistor that is turned on by a reset signal from the data processing unit (1) to discharge the holding capacitor. 3. The power source remote control unit (3) sends a control signal to the power source unit (2) through a detection unit (4) that detects the ringing signal and the power source control signal line (5). And a control signal transmitting unit (7) for charging, the control signal transmitting unit (7) is charged by a minute leakage current from the power source unit (2) which is not operating via the power source control signal line (5). And a capacitor (6) that is charged from the power supply unit (2) that is in operation and the detection unit (4) using the charging voltage of the capacitor (6) as an operating voltage.
A transistor (8) for controlling the operation / non-operation of the power supply unit (2) via the power supply control signal line (5) based on the detection signal of 2. The data terminal device according to claim 1, further comprising a switch circuit that controls so as not to operate even by the detection signal of the detection unit (4) while (1) is in operation. 4. The power source remote control unit (3) sends a control signal to the power source unit (2) through a detection unit (4) that detects the ringing signal and the power source control signal line (5). And a control signal transmitting section (7) for controlling the power source section (2) via the power control signal line (5) based on the detection signal of the detecting section (4). ) Is transmitted, and then the data processing unit (1) is operated by the operating voltage from the power supply unit (2).
2. The data terminal device according to claim 1, further comprising an abnormality determination unit that switches the power supply unit (2) to a non-operating state when the initial program loading process of (1) does not end normally.