CN1048926A

CN1048926A - Multifunctional active measuring device for locamotive signal

Info

Publication number: CN1048926A
Application number: CN 89105131
Authority: CN
Inventors: 刘世昌
Original assignee: Individual
Current assignee: Individual
Priority date: 1989-07-21
Filing date: 1989-07-21
Publication date: 1991-01-30

Abstract

The invention discloses a kind of multifunctional active tester that is used to detect the ac counting cab signal, it is mainly by input circuit, computer processing circuit, code signal generating circuit, power amplification output circuit and the working power that can be convenient for carrying, by microcomputer circuit and routine processes, export the current waveform signal of different frequency, different cycles by code signal generating circuit and power amplification output circuit, detect the quality of cab signal with this, but also nonoculture ultralow frequency sine wave source and the test of various signal Automatic Cycle signaling.Have volume characteristics little, multiple functional, easy to use.

Description

Multifunctional active measuring device for locamotive signal

The invention belongs to a kind of testing tool, particularly a kind of multifunctional active tester that is used to detect the ac counting cab signal.

Railway locomotive needs its various received signals that may occur in the interval (signals such as green light, amber light, reddish yellow lamp, automatic stopping) are simulated that cab signal on signaling, the test locomotive shows and the performance of automatic stop arrangement as last in operation, guarantee the safe operation of locomotive with this.The employed cab signal testing tool of China railways department is mostly for adopting relay and motor code sender to form circulation signaling device at present, itself no sine ac power supply, only can test the cab signal of 50HZ section by power frequency, and also do not have portable testing tool at present for the cab signal of 75HZ, 25HZ section, only for existing 50HZ portable type testing tool, two kinds of 1.6 seconds 1.9 seconds cycles only occupy one.Therefore volume is big, and function is few, can't satisfy the needs of on-the-spot actual test.

The purpose of this invention is to provide a kind of multiple functional, multifunctional active measuring device for locamotive signal that volume is little, easy to use.

The objective of the invention is to realize by following technical solution: it is made up of input circuit, computer processing circuit, code signal generating circuit, power amplification and test output circuit, stabilized voltage supply.Test needs according to the cab signal demonstration, plurality of keys switch in the input circuit is preset the function corresponding state, and give computer processing circuit with this status signal and discern laggard line program processing for microcomputer, its address data bus is received in the code signal generating circuit, produce corresponding code voltage waveform, give power amplification and test output circuit afterwards, through power amplification and output in the loop wire load, the signal induction device that has on this output signal electric current and the locomotive is responded to mutually, realizes test to the cab signal equipment with this.

The present invention can be according to the requirement emission different frequency of different section cab signals, the code signal of different cycles.Can show test (as only surveying steady yellow) to the individual event cab signal, also can show and make automatic cycle testing multinomial cab signal.And have by accumulator and discharge and recharge the portability D.C. regulated power supply that automatic control circuit is formed, satisfy the needs of on-the-spot real work with this.But the present invention is the nonoculture sine wave source also, provides degree of distortion not in 5% ultralow frequency (25HZ, 75HZ, 50HZ) signal.Compared with prior art have the characteristics that volume is little, multiple functional, practicality is stronger.

Detail of the present invention is provided by following examples and accompanying drawing thereof:

Fig. 1 is a theory diagram of the present invention;

Fig. 2-the 6th, electrical schematic diagram of the present invention.

With reference to the accompanying drawings, the present invention forms (referring to Fig. 1) by input circuit, computer processing circuit, code signal generating circuit, power amplification and test output circuit, stabilized voltage supply.Wherein input circuit is by the function button switch S ₁-S ₈, resistance R ₉-R ₁₆, capacitor C ₉-C ₁₆, eight input nand gate integrated circuit U ₁, double D trigger U ₂Form (referring to Fig. 2).According to the signal of the locomotive that will test with the function button switch S ₁-S ₈Placing a corresponding state (1-key assignments menu for details see attached table), is 50HZ as test frequency, and the cycle is 1.6 seconds a green light signals, then only need press the function button switch S ₈Get final product, i.e. function key S ₈-S ₁Switch is " 10000000 " state, and this key assignments status signal is delivered to computer processing circuit.Capacitor C ₉-C ₁₆Respectively and resistance R ₉-R ₁₆Constitute the input differentiating circuit, and accept the function button switch S respectively ₁-S ₈The input potential change, input nand gate U is given in its output ₁In, produce positive pulse signal and deliver to double D trigger U ₂CLK end, cause trigger U ₂Upset, and the negative level signal is sent into the single-chip microcomputer U of computer processing circuit by its output terminal Q ₃In provide and interrupt application INT, after the interrupt response by single-chip microcomputer U ₃P ₂₄Mouth is sent trigger U back to ₂P _R2Hold a negative potential, make trigger U ₂Reset;

Computer processing circuit is by single-chip microcomputer (8035) U ₃, latch (7416) U ₇, program storage (2716) U ₅Form (referring to Fig. 3).4MH _zQuartz crystal E ₁With capacitor C ₃₇, C ₁₇Constitute crystal oscillating circuit.Resistance R ₂₇With capacitor C ₁₈Constitute the input integral circuit, enter working routine when making the circuit energized.Capacitor C ₃₅, C ₃₆Be filter capacitor.Strong state of value signal I by input circuit output ₁-I ₈Deliver to single-chip microcomputer U ₃P ₁₀-P ₁₇Port is then by single-chip microcomputer U ₃DB ₀-DB ₇Mouth is through latch U ₇Deliver to program storage U ₅A ₀-A ₇, constantly change its address, by program storage U ₅Output port Q ₀-Q ₇Its inner program of storage and data-signal are read in single-chip microcomputer U ₃In and carry out, and by address data bus D ₀-D ₇Output offers the data that the code signal generating circuit produces various codes (being current waveform) signal.Storer U ₅Inside solidification 24 kinds of code signal generation programs and input, output, delay procedure are arranged (referring to subordinate list 2-storer U ₅Coding schedule);

Code signal generating circuit and power amplification and test output circuit are respectively by D/A converter (0832) U ₄, operational amplifier (LM324) U ₆, negative level generator (7660) U ₈And audio-frequency power amplifier (LA4505) U ₅Form (referring to Fig. 4).Produce the signal of various code data through D/A converter U by computer processing circuit output ₄With negative level generator U ₈And operational amplifier U ₆Can correspondingly produce the current waveform signal output of the full width of cloth between the 0-5V, through divider resistance R ₁₈Deliver to audio-frequency power amplifier U ₉, current waveform signal is amplified output, test the quality of the corresponding received signal of locomotive with the current waveform signal of its output.Audio-frequency power amplifier U ₉Be connected into the binary channels way of output, U ₉4 ends and 17 ends pass through capacitor C respectively ₂₃, resistance R ₁₉, R ₂₃And capacitor C ₂₅, resistance R ₂₀, R ₂₄To lead-out terminal (X _2-1, X _2-2) loop wire load R _F2Send various code measuring currents, its current value can be by regulating divider resistance R ₁₈P reaches the Ministry of Railways's every testing standard value promulgated by the ministries or commissions of the Central Government with the observation alternating-current meter.

Working power circuit (referring to Fig. 5), by transformer T, rectifier bridge E ₂, three terminal integrated voltage stabilizer (LM338) U ₁₂, (7805) U ₁₃And capacitor C ₁-C ₄, C ₆-C ₈, resistance R ₁-R ₃, R ₂₅, R ₈Constitute power supply stabilization circuit.By voltage stabilizer U ₁₂3 pin output 16V DC voltage, voltage stabilizer U ₁₃3 pin output 5V DC voltage.By integrated operational amplifier (LM324) U ₁₄, U ₁₅, relay J, accumulator (10GNY3) B and resistance R ₄-R ₇, R ₂₁, R ₂₂, capacitor C ₅, diode D ₂, stabilivolt D ₆Constitute and discharge and recharge automatic control circuit.U ₁₄Constitute the superpotential monitor, prevent the overvoltage charging of accumulator B in charging process, promptly when charging voltage surpasses 16V, the U14 output current makes the relay J adhesive, its normally closed contact disconnects, thereby cuts off charging circuit, while light emitting diode D ₄Extinguish.U ₁₅Constitute the under-voltage monitor, promptly when accumulator B voltage is lower than 10V, U ₁₅Output current makes light emitting diode D ₈Light, to show alarm.S among Fig. 5 ₀Be power switch, S ₁₀Be charging option switch, promptly work as

S

₁₀1,3 be charged state when connecting with 4,6, S ₉Be the ac/dc selector switch, promptly when its 1 and 2 termination is logical, select for use on-the-spot AC power, when its 1 and 3 termination is logical, select for use accumulator B as the working power of this tester (at the test site non-transformer time use) as test input power supply.

This tester also is provided with by operational amplifier U ₁₀, solid alternating-current switch U ₁₁Form and through single-chip microcomputer U ₃The current stretcher of processing controls (referring to Fig. 6).Operational amplifier U ₁₀The P of input end 12 and single-chip microcomputer ₂₇Mouth joins, by single-chip microcomputer U ₃Provide each cycle of switching value of carrier wave not, the code signal of kind, through operational amplifier U ₁₀Shaping is amplified, and drives solid alternating-current switch U ₁₁And by the extended terminal mouth X that connects its

output terminal

1 and 2 _2-3, X _2-4Output is used for the external track transformer of user.

The using method of this tester is at first with loop wire load R _Fz(normally lead) is connected to test output terminal mouth X _2-1, X _2-2On, this loop wire load is set up along track, purpose provides the rail current of simulation, then according to the cab signal that will test with the function button switch S ₁-S ₈Preset a function corresponding state, by test output terminal mouth X _2-1, X _2-2On the loop wire load on produce corresponding code signal, the locomotive telltale has a corresponding received signal corresponding with it and light when normal, proves that with this this cab signal is intact, otherwise proves that this cab signal receiving trap lost efficacy.

Key assignments menu (subordinate list 1)

Annotate: 1: key is pressed; 0: key restores;

Storer U ₅Coding schedule (subordinate list 2)

Claims

1, a kind of multifunctional active measuring device for locamotive signal, it comprises input circuit, computer processing circuit, code signal generating circuit and is connected the power amplification output circuit and the working power of code signal generating circuit output terminal, it is characterized in that:

Function button switch one tunnel in a, the input circuit links to each other through the input end of differentiating circuit with eight input nand gates, computer processing circuit is delivered on another road, the output terminal of input nand gate connects a double D trigger, and the output terminal of this trigger links to each other with the interrupt interface INT of single-chip microcomputer in the computer processing circuit;

B, computer processing circuit are made up of single-chip microcomputer, latch, program storage, and the program storage inside solidification has 24 kinds of code signal generation programs and input, output, delay procedure;

C, code signal generating circuit are made up of D/A converter, negative level generator and operational amplifier, and the input end of D/A converter links to each other with the data address bus of computer processing circuit.

2, by the described multifunctional active measuring device for locamotive signal of claim 1, it is characterized in that the power amplification output circuit of described connection code signal generating circuit output terminal adopts audio-frequency power amplifier LA4505, the binary channels way of output is adopted in its output.

3, by the described multifunctional active measuring device for locamotive signal of claim 1, it is characterized in that single-chip microcomputer P ₂₇Mouth also connects a current stretcher of being made up of operational amplifier and solid alternating-current switch.

4,, it is characterized in that in working power circuit, being provided with the charge-discharge control circuit of an accumulator and monitoring accumulator over-and under-voltage by the active many merits tester of the described cab signal of claim 1.