JPS5953746B2 - Dial impulse sending method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dial impulse sending system in which a processor such as a microprocessor controls an impulse sending relay to close a loop circuit to an exchange and send dial impulses.

Recently, a terminal telephone device has a built-in processor, and the impulse sending relay is controlled by the processor, and the contacts of the impulse sending relay inserted into the loop circuit are made to perform make and break operations, thereby closing the loop circuit and dialing impulses. An example of this method is disclosed in the "Key Telephone Exchange System" (Japanese Patent Application No. 83485/1983) filed separately by the present applicant.

However, relays generally have an operation delay time (hereinafter referred to as "operation time") and a recovery delay time (hereinafter referred to as "recovery time"), and a relay is a pulse-like control with a predetermined make time and break time. Even if a signal is sent, depending on the operating time and recovery time unique to each relay,
There is a delay in the timing when the relay contacts actually make and break, and the make and break times of the sent impulses are not as specified.
In extreme cases, the switching equipment's response may be inaccurate.

The present invention has an object of fundamentally eliminating such drawbacks of the conventional art, and uses a processor to actually measure and store the operating time and recovery time when the impulse sending relay actually operates and recovers. To provide an extremely rational dial impulse sending method that controls the operation and recovery of an impulse sending relay based on the operating time and recovery time, and sends out a dial impulse having a predetermined make time and break time. It is something.

Hereinafter, details of the present invention will be explained with reference to figures showing examples.

FIG. 1 is a block diagram of the central office line unit SLU in the above-mentioned "key telephone exchange system", and shows the diode and
A signal detection circuit DET using a bridge circuit, a photo coupler, etc. detects a calling signal arriving from the central office line SL, and provides this as incoming call information to the processor CPUs. operates, and by making the contact HSl, the primary winding of the line transformer LTs, which separates and sends only the audio signal to the terminal unit TEU that performs the exchange connection.
At the same time, the impulse sending relay HS is operated according to the control of the processor CPUs, and the contact HS1 is made and broken from the 1st field, and dial impulses are also sent. It has become something to do.

In addition, contact HS2, which makes and breaks at the same time as contact HS1, connects ground or power to the processor C.
A response signal indicating that the contact HSl has made or broken is sent to the processor CPU.
It is supposed to be given to s.

The processor CPUs are generally controlled by a separately provided main control unit MCU, and are configured to send out predetermined dial impulses in accordance with the control from the main control unit MCU. FIG. 2 is a time chart showing the control signal and response signal from the processor CPUs in FIG. It enters the operating state and closes the loop circuit, but the response signal b is sent to the impulse sending relay HS.
After a specific operating time TMO, ``H'' is reached, and the loop circuit actually closes at time 2.

Next, when the processor CPUs start controlling the transmission of dial impulses, the control signal a becomes "L" at time point 3.
゛ (low level), and as a result, the impulse sending relay HS starts to recover, but since it recovers after the recovery time TBO unique to the relay HS, the contacts HSl and hS2 break at time 4. and the response signal b is ゜“
It becomes L.

Note that the operating time TMD is approximately constant depending on the power applied to the coil if the relays are of the same type, but it changes depending on the power supply voltage during use, and the recovery time TB
D varies depending on the tension of the contact spring and the recovery spring determined for each relay, and each is unique depending on the individual differences of the relay and the conditions of use. For this reason, the processor CPUs measure the time between time points 1 and 2 and the time between time points 3 and 4 by counting clock pulses, etc., and calculate the operating time TMD and recovery time obtained thereby. Time TB
The actual measured value of O is stored as data in the memory of the processor CPUs, and the processor CPUs calculates TB-Tl4D based on the stored operating time Tl4D and with a predetermined break time TB as a reference. Then, the passage of time is monitored by a timer configured in the processor CPUs, such as counting clock pulses, and at time 5, when the time TB-TMD has elapsed from time 4, the control signal a is set to "H". , at time 6, which has passed the operating time TMO from time 5, the impulse sending relay HS becomes operational, and the contacts HSl and hS
2 makes, a predetermined break TB is regulated.

Also, based on the recovery time TBO stored in the processor CPUs, T. -TB
After performing the operation of O, TM is calculated from time 6 as before.
- At time point 7 after TBO, control signal a is set to ゜゜L.
In order to do this, the impulse sending relay HS will be restored at time 8 after the restoration time TBD, and the contact HSl will be restored.
, hS2, a predetermined make time TM is regulated.

Note that between time points 5 and 6 and between time points 7 and 8, the processor CPUs actually measure the operating time TMD and recovery time TBD, update the contents of the memory based on the results, and then update the control signal. This is the basis for determining TB-TMD and TM-TBO when changing a, and the above operations are repeated according to the number of dial impulses sent from the main control unit MCU.
After the transmission of the dial impulse is finished, the control signal a is held at "H". However, since the operating time TMD is almost the same if the usage conditions are constant, actual measurements after time points 5 and 6 are omitted. The actual measured values at time points 1 and 2 may be used for subsequent control.Similarly, the recovery time TBO is actually measured only at the first recovery of the impulse sending relay HS, that is, at time points 3 and 4, and the actual measured value is used for subsequent control. May be used for.

Although control becomes more accurate by repeating actual measurements, it is also possible to repeat actual measurements of at least one of the operation and recovery times TMD and TBD, such as repeating only the actual measurement of the recovery time TBD. Get results.

3 to 5 are flowcharts showing the above control operations in the processor CPUs, with FIG. 3 showing the common routine and FIG. 4 showing the operating time TMD and recovery time T.
FIG. 5 shows a routine for actually measuring BD only once for the first time, and a routine for repeatedly measuring operating times Tl, O and recovery time TBD.

That is, in FIG. 3, after "initial state setting",
Main control unit “Loop closing command from MCU is YE”
If S, the control signal a is set to ``H'' by ``゜Relay operation command'' and clock pulse counting is started to actually measure the operating time TMD by ``゜゜TM0 time count start'', and the ``loop closing group'' is started. is “
Through TMD time count registration and TM0 registration result memory storage, the time count registration results are sequentially updated and stored in the memory, and by making contact HS2, “
When loop closing becomes YES, “TMD time count end” is done, and the memory contents at this time are the operating time T.
This is the actual measured value of MO.

In addition, while the loop closing button is NO, the pre-scheduled maximum operating time of the impulse sending relay HS is compared with the contents of the memory that stores the operating time count registration value, and the specified delay time is calculated. The progress 7' is monitored, and if the result is YES, it is assumed that a failure has occurred and the operation is repeated from the beginning.

゜ ゜ ゜ loop closing ゛ After YES and ゜ “TMD time count end”, if the main system units “dial commands from the MCU MCU are YES, the recovery time TBO will be measured by“ TBD time count start ”to measure the recovery time TBO. After the clock pulse count is started, the control signal a is set to "L" by the "relay recovery command".

In FIG. 4, the determination of ゜゜Relay restoration command 7゛ is made, and through this YES, the first restoration zo is determined as ``When the relay restoration command is NO,'' and this is YES.
If so, “゜TB0 time count registration” and ゜゜T
The reclock pulse count result is stored in the memory by B0 registration result memory storage, and the relay recovery program is set to YES.
This process is repeated until the TBD time count ends and the contents of the memory are updated one after another.

Also, “If the relay recovery option is YES, ゜゜TB
After the end of the 0-hour count, "゜TB-" is based on the operation time TMD finally stored in the memory by the above operation.
The TMD calculation/timer setup sets the calculation and calculation results to the timer, starts the timer, and when the timer's time-up turns "T, TMD elapsed" to YES, the relay operates. Execute the command and operate the impulse sending relay HS.

Next, after passing through the ``゜relay recovery command'' and ``NO'' from the main control unit MCU to end the dial command, if the ``relay operation'' becomes YES, the recovery time that was finally stored in the memory is returned. Based on TBO “゜TM
- Perform the calculation and set the calculation result to the timer in the same manner as described above using the TBO calculation/timer setup,
This starts the timer, and then the
The ES sends out a "relay recovery command" and repeats the above operations.

However, once the "TB-TMD operation/timer set-up" and "TM-TBO operation/timer set-up" timer set-ups are performed, the "TB elapsed time" and "T
It is not done during the repetition of the same route through the NO in the M-TBD transition group.

If the "relay recovery command" is NO and the end of dial command from the main control unit MCU becomes YES, the process returns to B in Figure 3 and the end of the dial command from the main control unit MCU is returned. Main control unit MCU via NO
The loop closed state is maintained until the loop open command from the loop becomes YES and a "relay recovery command" is issued.

In FIG. 5, ``TBO time count registration'' and ``TBO registration result memory storage'' are performed after the make period of each dial impulse via ``YES'' in the ``relay recovery command'' and ``NO'' in the ``relay recovery command''. , the recovery time TBD is measured and the memory contents are sequentially updated each time the control signal a is set to ``L'', and the contents are sequentially used for regulating the make time TM.

Note that the second and subsequent "゜TBD time count start'' is performed after the "relay recovery command" following the "TM-TBO elapsed step" is issued.

Also, every time the ゜゜relay operation command゛ is issued, ゜゜TM
``TMD time count registration'' and ゜゜TM are performed while ゛゛ is done and ゜゜relay operation 7゛ is NO.
In addition to repeatedly storing the D registration results in memory,
゜゜TMD when ゜relay operation mode becomes YES
The actual measurement of the operating time T is completed when the time count ends, and the contents of the memory are sequentially updated based on this, and the contents are sequentially used for regulating the break time TB.

Therefore, since control is performed based on the actually measured operating time TMO and recovery time TBD of the impulse sending relay HS, the make time TM and break time TB of the dial impulse to be sent out are reliably regulated to predetermined values. The response on the exchange side is always accurate. Incidentally, in order to omit the repeated actual measurement of either the operation time TMD or the recovery time TBO, the corresponding step may be deleted from FIG.

As is clear from the above explanation, according to the present invention, since the impulse sending relay is controlled based on the actually measured operating time and recovery time of the impulse sending relay, the meter time of the dial impulse to be sent and the break The time is maintained at a predetermined value, and the make rate is also matched to a predetermined value, which provides a remarkable effect in various terminal telephone devices that transmit dial pulses under the control of a processor.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention; Fig. 1 is a block diagram of a central office line unit in a "button telephone exchange system"; Fig. 2 is a time chart showing signals of each part in Fig. 1; Figs. The figure is a flowchart showing control operations in the processor. CPUs...Processor, HS...Impulse sending relay, HSl, hS2...Contact.

Claims (1)

[Scope of Claims] 1. In a dial impulse sending method in which an impulse sending relay is operated and restored under the control of a processor, and a contact point of the impulse sending relay closes a loop circuit and sends out a dial impulse, the processor: Actually measure and store the operation delay time of the impulse sending relay when the loop circuit is closed, and actually measure the recovery delay time of the impulse sending relay when the impulse sending relay first recovers when sending out the dial impulse. and performs operation and recovery control on the impulse sending relay for sending the dial impulse from the processor based on the stored operation delay time and recovery delay time, and has a predetermined make time and break time. A dial impulse sending method characterized in that the dial impulse is sent. 2. In a dial impulse sending method in which an impulse sending relay is operated and restored under the control of a processor, and a contact point of the impulse sending relay closes a loop circuit and sends out a dial impulse, the processor controls when the loop circuit is closed. The operation delay time of the impulse sending relay is actually measured and stored, and the recovery delay time of the impulse sending relay is actually measured and stored at the time of the first recovery of the impulse sending relay when sending out the dial impulse, and thereafter. at least one of the operation and recovery delay times of the impulse sending relay is actually measured and sequentially updated and stored, and the dial impulse is sent from the processor based on the stored operation delay time and recovery delay time. 1. A dial impulse sending method, characterized in that the dial impulse sending system performs operation and recovery control for the impulse sending relay to send out the dial impulse having a predetermined make time and a predetermined break time.