CN2132359Y

CN2132359Y - Programme control measuring position

Info

Publication number: CN2132359Y
Application number: CN 92224666
Authority: CN
Inventors: 胡晓晨
Original assignee: HUAGUANG COMMUNICATION ELECTRONIC INST CHAOYANG DISTRICT CHANGCHUN CITY
Current assignee: HUAGUANG COMMUNICATION ELECTRONIC INST CHAOYANG DISTRICT CHANGCHUN CITY
Priority date: 1992-06-10
Filing date: 1992-06-10
Publication date: 1993-05-05
Anticipated expiration: 2002-06-10

Abstract

The utility model discloses a programme control test board, which is an auxiliary device of SPC telephone exchange. The utility model is designed for domestic 1240 SPC telephone exchanges. In the programme control test board, all signals are processed by a computer, and the service acceptation circuits, function circuits, programmed control interface circuits, test circuits and calibration circuits are connected with a single-chip computer through interface chips, forming a programme control test board with all service circuits controlled by a single-chip computer. Therefore, the utility model has the advantages of fast test speed, great variety of functions and reliable overall machine performance. The test board is connected with a microcomputer during use. Apart from the completion of accepting 112 service, the programme control test board can implement further networking, carry out automatic case testing for subscribers and manage the services in a measuring room.

Description

Programme control measuring position

The utility model belongs to communication equipment.

At present, SPC telephone exchange just extensively replaces electromechanical switching equipment.Except that introducing equipment, homemade 1240 SPC telephone exchange are also progressively being used, but its auxiliary device test desk vacancy always, thereby have influenced the performance of 1240 SPC telephone exchange.

The purpose of this utility model is to provide a kind of supporting test desk of homemade 1240 SPC telephone exchange that is.

As shown in Figure 1, the technical solution of the utility model is to handle various signals with monolithic computer, to accept service circuit, functional circuit, programmable interface circuit, test circuit, calibration circuit and link to each other with single-chip microcomputer, constitute a SPC telephone exchange test desk by the whole service circuits of Single-chip Controlling by interface chip.

In the utility model, accept circuit and constitute by ringing signal circuit and control circuit two parts, as shown in Figure 2, the ringing signal circuit is made of rectification circuit and buffer circuit; Control circuit is made up of relay, buffer circuit and drive circuit.The ringing signal circuit links to each other with interface chip with control circuit.During this circuit working, ringing signal is transported to the input port of interface chip through the ringing signal circuit, under minder person's operation by the interface chip output signal, the control relay action, thus realize admissibility.In the utility model, have eight road ringing-current circuit and control circuit formation and accept the industry circuit.

Functional circuit is made of following five circuit, as shown in the figure:

1, monitors circuit for answering, form by buffer circuit and ringing-current circuit;

2, monitor the on-hook circuit, form by relay, buffer circuit, oscillating circuit, power amplifier;

3, received pulse decoding circuit is made up of buffer circuit, relay;

4, double audio code receiving circuit is made up of audio chip and relay;

5, control circuit is made up of relay, buffer circuit and drive circuit.

Five circuit and interface chip join, during circuit working, the various signals of being sent here by

circuit

1,2,3,4 are gathered in the input port of interface chip, delivery outlet send the TTL low level to give circuit 5(control circuit), control relay work, thereby with ringing-current, urge and hanging and the dialer receiving circuit inserts speech channel, realize several the functions of this circuit.

The programmable interface circuit is by horizontal control circuit, vertical control circuit and be made of (4 * 5) matrix circuit that 20 relays are formed, and as shown in Figure 4, horizontal control circuit is made up of drive circuit, buffer circuit, unidirectional triple gate in the programmable interface circuit; Vertically control circuit is by switching circuit, buffer circuit and unidirectional triple gate are formed, during this programmable interface circuit working, the delivery outlet of interface chip is sent one group of TTL low level according to operator's instruction, deliver to horizontal stroke, vertical control circuit respectively, make the actuating of relay on the corresponding matrix circuit crosspoint, to reach the function that any thousand crowds of users of control insert speech channel.

Test circuit is made of following 3 circuit, as shown in Figure 5:

1, test machine line parametric circuit is made of buffer circuit, discharge circuit and pressure sampling circuit, and two-way is surveyed the A line for one group altogether, surveys the B line for one group;

2, test machine line capacitance circuit is made up of buffer circuit switch amplifying circuit and 16HZ signal source;

3, control circuit is made of relay, drive circuit and buffer circuit, during test circuit work, the delivery outlet of interface chip send the TTL low level to give control circuit, the action of control corresponding relays is to realize surveying A, B line resistance, electric current, functions such as A, B line capacitance.

Calibration circuit is by relay.Control circuit that drive circuit and buffer circuit are formed and standard value resistance and electric capacity are formed, and control circuit and interface chip join.During this circuit working, TTL low level of interface chip output is given control circuit, and the action of control corresponding relays constitutes related circuit by order, insert different calibrating resistance or electric capacity, make the A that tests, the calibration value that the various parameters of B line have a standard of comparison.

This test desk adopts integrated circuit (IC) chip in a large number, makes the complete machine dependable performance, and test speed is fast.Link to each other with microcomputer when this test desk is used, accept 112 business, under microcomputor program control, can further realize networking, the user is carried out example survey automatically and to the service management of measuring chamber except that finishing.This test desk is multiple functional, and the realization a tractor serves several purposes can be increased work efficiency greatly.

Accompanying drawing 1 is the utility model structure principle chart;

Accompanying drawing 2 is accepted circuit diagram for the utility model;

Accompanying drawing 3 is the utility model functional circuit;

Accompanying drawing 4 is the utility model programmable interface circuit diagram;

Accompanying drawing 5 is the utility model test circuit figure;

Accompanying drawing 6 is the utility model calibration circuit figure.

Provide embodiment of the present utility model below in conjunction with accompanying drawing, introduce each service circuit in detail.

Single-chip microcomputer is 8031 in an embodiment, and connecing chip is 8155.

1, accept circuit and be made up of ringing signal circuit and control circuit, as shown in Figure 2, the rectification circuit in the ringing-current circuit adopts rectifier bridge, electric capacity 2C ₂And 2QL ₁Be connected across on service circuit A, the B line.Buffer circuit is made of optocoupler, resistance and electric capacity, and the output 5 of optocoupler is connected on the PC mouth of 8155 chips, 2C ₁Be connected across 4,5 ends of optocoupler, strobe 2QL ₁Output through 2R ₁Join with 1,2 ends of optocoupler; Control circuit is made of relay, optocoupler, driver, diode and resistance, the PA mouth of 2 terminations, 8155 chips of optocoupler, 5 terminator actuator 2JA of optocoupler ₁Input, output end of driver is connected to relay 2K ₁, relay diode in parallel shields, and ringing-current circuit and control circuit have 8 the tunnel in accepting circuit, the shared driver of wherein every two-way.

2, in functional circuit as shown in Figure 3:

A, supervision circuit for answering are made up of buffer circuit and ringing-current circuit.Identical in the buffer circuit and aforementioned 1, the ringing-current circuit is then by 3C ₁, 3R ₁, 3C ₂Constitute with 3R.

B, monitor the on-hook circuit, by relay CQ(PR101), buffer circuit, oscillating circuit and power amplifier form, buffer circuit employing optocoupler structure, 4 of optocoupler terminates on the interface chip,

C, received pulse decoding circuit are by relay YD(PR101), buffer circuit forms, buffer circuit adopts the optocoupler structure, buffer circuit is connected on 3,4 ends of relay.

D, double audio code receiving circuit are by audio chip 3D ₂With relay YD(PR101) form the double audio code receiving circuit, audio chip is connected with 8155 chips.

E, control circuit are identical with control circuit structure in aforementioned 1.

3, the programmable interface circuit is as shown in Figure 4:

A, horizontal control circuit are by driver 4AJ ₁, optocoupler 4V ₁With unidirectional triple gate 4D ₂Constitute;

B, vertical control circuit are by switching circuit, optocoupler 4V ₂With unidirectional triple gate 4D ₃Form, wherein switching circuit is by resistance, triode 4BG ₁, diode 4D ₄With relay 4K ₁Constitute, matrix circuit is formed 4 * 5 matrixes by 20 relays.

4, test circuit,

A, test machine line parametric circuit are made of buffer circuit, discharge circuit and pressure sampling circuit, are total to two-way, a drive test A line, a drive test B line.Buffer circuit is the optocoupler structure, and discharge circuit is by transport and placing device 5V ₁Constitute, pressure sampling circuit is by 5R ₉And 5R ₁₀Constitute.

B, test machine line capacitance circuit are by buffer circuit (5V ₅) switch amplifying circuit and 16HZ signal source composition, wherein the switch amplifying circuit is by triode 5BG ₁, 5BG ₂, 5BG ₃, optocoupler 5V ₆Reach formations such as electric capacity, resistance, diode.

D, control circuit are identical with control circuit structure in aforementioned 1.

5, calibration circuit is made of control circuit and standard value resistance and electric capacity, and control circuit is by optocoupler 6V ₁,

relay

6K ₁, 6K ₂With driver 6AJ ₁Constitute, its structure is identical with control circuit in aforementioned 1, and in calibration circuit, same control circuit is 12 the tunnel.Standard value electric capacity and resistance are connected to little relay respectively, and electric capacity and resistance have 8 groups respectively.

Claims

1, a kind of program control test desk, it is characterized in that it by single-chip microcomputer, accept service circuit, functional circuit, programmable interface circuit, test circuit calibration circuit and form, foregoing circuit links to each other with single-chip microcomputer separately by interface chip.

2, according to the said program control test desk of claim 1, it is characterized in that accepting service circuit is made of ringing signal circuit and control circuit, bell signal flow circuit is made up of rectification circuit and buffer circuit, control circuit is made up of relay, buffer circuit and drive circuit, has eight road ringing signal circuit and control circuit formation and accepts service circuit.

3,, it is characterized in that functional circuit is made of following five circuit according to the said program control test desk of claim 1;

A, supervision circuit for answering are made up of buffer circuit and ringing-current circuit;

B, supervision on-hook circuit are made up of relay, buffer circuit, oscillating circuit and power amplifier;

C, received pulse decoding circuit are made up of buffer circuit and relay;

D, double audio code receiving circuit are made up of audio chip and relay;

E, control circuit are made up of relay, buffer circuit and drive circuit.

4, according to the said program control test desk of claim 1, it is characterized in that the programmable interface circuit is by horizontal control circuit, vertical control circuit and 4 * 5 matrix circuits formation of forming by 20 relays, laterally control circuit is made up of drive circuit, buffer circuit and unidirectional triple gate, vertically vertical system electric routing switch circuit, buffer circuit and unidirectional triple gate are formed.

5, it is characterized in that according to the said program control test desk of claim 1 test circuit is made up of following three circuit:

A, test machine line parametric circuit are made of buffer circuit, discharge circuit and pressure sampling circuit, and two-way is surveyed the A line for one group altogether, surveys the B line for one group;

B, test machine line capacitance circuit are made up of buffer circuit, switch amplifying circuit and 16HZ signal source;

C, control circuit are made up of relay, drive circuit and buffer circuit.

6, according to the said program control test desk of claim 1, it is characterized in that calibration circuit is made of control circuit and standard value resistance and electric capacity, control circuit is made up of relay, drive circuit and buffer circuit.