CN201749167U

CN201749167U - A connection terminal disconnection detection circuit

Info

Publication number: CN201749167U
Application number: CN201020263737XU
Authority: CN
Inventors: 于玮
Original assignee: Guangdong East Power Co Ltd
Current assignee: Guangdong East Power Co Ltd
Priority date: 2010-07-20
Filing date: 2010-07-20
Publication date: 2011-02-16
Anticipated expiration: 2020-07-20

Abstract

A connecting terminal disconnection detection circuit is used for detecting the connection condition of a connecting terminal PA and a connecting terminal PB and is provided with a detection unit, an analysis unit and an output unit, the input end of the detection unit is connected with a detection terminal, the output end of the detection unit is connected with the input end of the analysis unit, and the output end of the analysis unit is connected with the input end of the output unit. The detection unit is provided with a resistor R11, a capacitor C11, a resistor R21 and a capacitor C21, and the analysis unit is provided with a resistor R12, an optocoupler ISO1, a diode D11, a diode D12, a resistor R22, an optocoupler ISO2, a diode D21 and a diode D22; the output unit is provided with a resistor R3, a resistor R4, a resistor R5, a capacitor C3 and a triode Q3. The utility model discloses can real time monitoring system connection terminal's connection state.

Description

A kind of splicing ear testing circuit that goes offline

Technical field

The utility model relates to the electrical equipment technical field, particularly relates to a kind of splicing ear testing circuit that goes offline.

Background technology

In various industrial electrical installations inside, all use splicing ear in a large number, purpose can be the signal transmission, also can be power supply transfer or the like.In the prior art, splicing ear generally adopts mechanical type to fix, and wherein a kind of fixed form is by installing and fixing shell on splicing ear, shell is fixed by the terminal that modes such as screw are connected with desire, and some are also arranged is to adopt the plastics cassette to fix.Though above-mentioned mechanical type fixed form can realize fixing between the splicing ear to a certain extent, connect unsettled defective but still exist, go wrong in case connect between the splicing ear, electrical equipment can't just produce work, even consequence such as damage also can occur.The more important thing is, fixed form of the prior art, can't detect the connection situation of splicing ear in real time, therefore, the control center of equipment just can't formulate the control corresponding scheme at the situation that connects, avoid occurring unpredictable failure effect so can not when splicing ear occurs connecting fault, take corresponding control measures, cause bigger trouble for the use of electrical equipment.

Therefore, at the deficiencies in the prior art, provide a kind of splicing ear that can in time detect splicing ear connection fault to go offline testing circuit to overcome very necessity of prior art weak point.

Summary of the invention

The purpose of this utility model is to avoid the deficiencies in the prior art part and a kind of splicing ear testing circuit that goes offline is provided, and this splicing ear testing circuit that goes offline can detect the connection situation of splicing ear in real time.

The purpose of this utility model realizes by following technical measures.

A kind of splicing ear testing circuit that goes offline, be used to detect the connection state of splicing ear PA and splicing ear PB, splicing ear PA is provided with detection terminal CONNECT_A and GND1, splicing ear PB is provided with detection terminal CONNECT_B and GND2, the described splicing ear testing circuit that goes offline is provided with probe unit, analytic unit and output unit, the input end of described probe unit and described detection terminal CONNECT_A, GND1, CONNECT_B is connected with GND2, the output terminal of described probe unit is connected with the input end of described analytic unit, and the output terminal of described analytic unit is connected with the input end of described output unit.

Further, above-mentioned probe unit is provided with resistance R 11, capacitor C 11, resistance R 21 and capacitor C 21;

One end of described resistance R 11 is connected with described detection terminal CONNECT_A, and the other end of described resistance R 11 is connected with an end of described capacitor C 11, and the other end of described capacitor C 11 is connected with described detection terminal GND1;

One end of described resistance R 21 is connected with described detection terminal CONNECT_B, and the other end of described resistance R 21 is connected with an end of described capacitor C 21, and the other end of described capacitor C 21 is connected with described detection terminal GND2;

The other end of the other end of described resistance R 11, described resistance R 21 is connected with the input end of described analytic unit.

Preferably, above-mentioned resistance R 11 is 470 Europe, and described capacitor C 11 is 100 nanofarads, and described resistance R 21 is 470 Europe, and described capacitor C 21 is 100 nanofarads.

Further, above-mentioned analytic unit is provided with resistance R 12, optocoupler ISO1, diode D11, diode D12, resistance R 22, optocoupler ISO2, diode D21 and diode D22;

1 termination of described optocoupler ISO1+5V current potential, 2 ends of described optocoupler ISO1, the positive pole of described diode D11 are connected with the other end of described

resistance R

11,3 ends of described optocoupler ISO1 are connected with GND3, one termination of described resistance R 12+3.3V current potential, 4 ends of the other end of described resistance R 12, described optocoupler ISO1 are connected with the positive pole of described diode D12;

The negative pole of 1 end of described optocoupler ISO2, the negative pole of described diode D11, described diode D21 connects+the 5V current potential, 2 ends of described optocoupler ISO2, the positive pole of described diode D21 are connected with the other end of described

resistance R

21,3 ends of described optocoupler ISO2 are connected with GND3, one termination of described resistance R 22+3.3V current potential, 4 ends of the other end of described resistance R 22, described optocoupler ISO2 are connected with the positive pole of described diode D22;

The negative pole of the negative pole of described diode D12, described diode D22 is connected with the input end of described output unit.

Preferably, above-mentioned resistance R 12 is 1.5 kilo-ohms, and described resistance R 22 is 1.5 kilo-ohms.

Further, above-mentioned output unit is provided with resistance R 3, resistance R 4, resistance R 5, capacitor C 3 and triode Q3;

One end of described resistance R 3 is connected with the negative pole of diode D12, one end of the other end of described resistance R 3, described resistance R 4, an end of described capacitor C 3 are connected with the base stage of described triode Q3, the emitter of the other end of the other end of described resistance R 4, described capacitor C 3, described triode Q3 is connected with GND3, one termination of described resistance R 5+3.3V current potential, the other end of described resistance R 5 is connected with the collector of described triode Q3.

Preferably, above-mentioned resistance R 3 is 1 kilo-ohm, and described resistance R 4 is 47 kilo-ohms, and described resistance R 5 is 4.7 kilo-ohms, and described capacitor C 3 is 100 nanofarads.

A kind of splicing ear testing circuit that goes offline, be used to detect the connection state of splicing ear PA and splicing ear PB, splicing ear PA is provided with detection terminal CONNECT_A and GND1, splicing ear PB is provided with detection terminal CONNECT_B and GND2, the described splicing ear testing circuit that goes offline is provided with probe unit, analytic unit and output unit, the input end of described probe unit and described detection terminal CONNECT_A, GND1, CONNECT_B is connected with GND2, the output terminal of described probe unit is connected with the input end of described analytic unit, and the output terminal of described analytic unit is connected with the input end of described output unit.A kind of splicing ear of the present utility model goes offline, and testing circuit detects in real time by probe unit and the connection status of supervisory system splicing ear, can be when splicing ear goes wrong, system can make corresponding processing action, thereby avoids the generation of system problem.

Description of drawings

The utility model will be further described in conjunction with the accompanying drawings, but the content in the accompanying drawing does not constitute any restriction of the present utility model.

Fig. 1 is the synoptic diagram of splicing ear PA and splicing ear PB.

Fig. 2 is the go offline circuit diagram of embodiment 1 of testing circuit of a kind of splicing ear of the utility model.

Fig. 3 is the go offline circuit diagram of embodiment 2 of testing circuit of a kind of splicing ear of the utility model.

In Fig. 2, Fig. 3, comprising:

Probe unit 100,

Analytic unit 200,

Output unit 300.

Embodiment

With the following Examples the utility model is further described.

Embodiment 1.

Exist two splicing ears of PA and PB to need to be connected in the system.In order to detect the state that PA is connected with PB, two pins of each terminal need be opened up and be the detection terminal.As shown in Figure 1, splicing ear PA is provided with two detection terminals: the 13rd pin CONNECT_A and the 1st pin GND1.Splicing ear PB is provided with two detection terminals: the 13rd pin GND2 and the 1st pin CONNECT_B.If splicing ear PA is connected well with splicing ear PB, CONNECT_A will reliably be connected with GND1 so, and CONNECT_B also will reliably be connected with GND2.Need to prove that the utility model is fit to detect all kinds of splicing ears with different pins, also can detect any pin of two splicing ears that link together.

A kind of splicing ear testing circuit that goes offline as shown in Figure 2, is used to detect the connection state of splicing ear PA and splicing ear PB.The splicing ear testing circuit that goes offline is provided with probe unit 100, analytic unit 200 and output unit 300.The input end of probe unit 100 is connected with detection terminal CONNECT_A, GND1, CONNECT_B and GND2, and the output terminal of probe unit 100 is connected with the input end of analytic unit 200, and the output terminal of analytic unit 200 is connected with the input end of output unit 300.

Probe unit 100 is provided with resistance R 11, capacitor C 11, resistance R 21 and capacitor C 21.

One end of resistance R 11 is connected with detection terminal CONNECT_A, and the other end of resistance R 11 is connected with an end of capacitor C 11, and the other end of capacitor C 11 is connected with described detection terminal GND1.

One end of resistance R 21 is connected with detection terminal CONNECT_B, and the other end of resistance R 21 is connected with an end of capacitor C 21, and the other end of capacitor C 21 is connected with described detection terminal GND2.

The other end of the other end of resistance R 11, resistance R 21 is connected with the input end of analytic unit 200.

Analytic unit 200 is provided with resistance R 12, optocoupler ISO1, diode D11, diode D12, resistance R 22, optocoupler ISO2, diode D21 and diode D22.

1 termination of optocoupler ISO1+5V current potential, 2 ends of optocoupler ISO1, the positive pole of diode D11 are connected with the other end of

resistance R

11,3 ends of optocoupler ISO1 are connected with GND3, one termination of resistance R 12+3.3V current potential, and 4 ends of the other end of resistance R 12, optocoupler ISO1 are connected with the positive pole of diode D12.

The negative pole of 1 end of optocoupler ISO2, the negative pole of diode D11, diode D21 connects+the 5V current potential, 2 ends of optocoupler ISO2, the positive pole of diode D21 are connected with the other end of

resistance R

21,3 ends of optocoupler ISO2 are connected with GND3, one termination of resistance R 22+3.3V current potential, 4 ends of the other end of resistance R 22, optocoupler ISO2 are connected with the positive pole of diode D22.

The negative pole of the negative pole of diode D12, diode D22 is connected with the input end of output unit 300.

Output unit 300 is provided with resistance R 3, resistance R 4, resistance R 5, capacitor C 3 and triode Q3.

One end of resistance R 3 is connected with the negative pole of diode D12, one end of the other end of resistance R 3, resistance R 4, an end of capacitor C 3 are connected with the base stage of triode Q3, the emitter of the other end of the other end of resistance R 4, capacitor C 3, triode Q3 is connected with GND3, one termination of resistance R 5+3.3V current potential, the other end of resistance R 5 is connected with the collector of triode Q3.

The splicing ear of the present utility model testing circuit that goes offline, it detects principle and is:

If splicing ear PA reliably is connected with splicing ear PB, detection terminal CONNECT_A is connected with GND1 so, detection terminal CONNECT_ B is connected with GND2, then optocoupler ISO1 and ISO2 are with conducting, optical coupling secondary edges all will be low level, the Q3 triode will be not can conducting, the output terminal CONNECT_ FB of the output unit of testing circuit will be high level.

If splicing ear PA unreliable situation about being connected occurs with splicing ear PB, detection terminal CONNECT_A or detection terminal CONNECT_B one of them or all will disconnect and being connected with GND, detection terminal CONNECT_A or detection terminal CONNECT_B have at least one can not be in low level so, then optocoupler ISO1 and ISO2 one of them will be not can conducting, the secondary output of one of them optocoupler will be drawn high is high level.Because the output of the secondary of two optocouplers is undertaken or logic by diode D12 and diode D22, the Q1 triode will conducting so, and testing circuit output will be pulled down to low level.

By above analysis as can be known, splicing ear PA and PB are being connected normally when being connected fault, and testing circuit has provided opposite logic level, by this level amount, the control center of electrical equipment just can carry out corresponding action and handle, and prevents that terminal from connecting the system-level malfunction that fault causes.

Embodiment 2.

A kind of splicing ear testing circuit that goes offline as shown in Figure 3, is used to detect splicing ear PA shown in Figure 1 and the connection state of splicing ear PB.Splicing ear PA is provided with detection terminal CONNECT_A and GND1, and splicing ear PB is provided with detection terminal CONNECT_B and GND2.The splicing ear testing circuit that goes offline is provided with probe unit 100, analytic unit 200 and output unit 300.The input end of probe unit 100 is connected with detection terminal CONNECT_A, GND1, CONNECT_B and GND2, and the output terminal of probe unit 100 is connected with the input end of analytic unit 200, and the output terminal of analytic unit 200 is connected with the input end of output unit 300.

Probe unit 100 is provided with resistance R 11, capacitor C 11, resistance R 21 and capacitor C 21, and resistance R 11 is 470 Europe, and capacitor C 11 is 100 nanofarads, and resistance R 21 is 470 Europe, and capacitor C 21 is 100 nanofarads.

Analytic unit 200 is provided with resistance R 12, optocoupler ISO1, diode D11, diode D12, resistance R 22, optocoupler ISO2, diode D21 and diode D22, and resistance R 12 is 1.5 kilo-ohms, and resistance R 22 is 1.5 kilo-ohms.

resistance R

Output unit 300 is provided with resistance R 3, resistance R 4, resistance R 5, capacitor C 3 and triode Q3, and resistance R 3 is 1 kilo-ohm, and resistance R 4 is 47 kilo-ohms, and resistance R 5 is 4.7 kilo-ohms, and capacitor C 3 is 100 nanofarads.One end of resistance R 3 is connected with the negative pole of diode D12, one end of the other end of resistance R 3, resistance R 4, an end of capacitor C 3 are connected with the base stage of triode Q3, the emitter of the other end of the other end of resistance R 4, capacitor C 3, triode Q3 is connected with GND3, one termination of resistance R 5+3.3V current potential, the other end of resistance R 5 is connected with the collector of triode Q3.

The parameter value of above components and parts is only for reference, when the practical application the technical program, can adjust above parameter value.

If splicing ear PA unreliable situation about being connected occurs with splicing ear PB, detection terminal CONNECT_A or CONNECT_B one of them or all will disconnect and being connected with GND, detection terminal CONNECT_A or CONNECT_B have at least one can not be in low level so, then optocoupler ISO1 and ISO2 one of them will be not can conducting, the secondary output of one of them optocoupler will be drawn high is high level.Because the output of the secondary of two optocouplers is undertaken or logic by diode D12 and diode D22, the Q1 triode will conducting so, and testing circuit output will be pulled down to low level.

Should be noted that at last; above embodiment is only in order to the explanation the technical solution of the utility model but not to the restriction of the utility model protection domain; although the utility model has been done detailed description with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can make amendment or be equal to replacement the technical solution of the utility model, and not break away from the essence and the scope of technical solutions of the utility model.

Claims

1. A connection terminal disconnection detection circuit for detecting the connection status of the connection terminal PA and the connection terminal PB, the connection terminal PA is provided with detection terminals CONNECT_A and GND1, and the connection terminal PB is provided with detection terminals CONNECT_B and GND2, characterized in that : the connection terminal drop detection circuit is provided with a detection unit, an analysis unit and an output unit, the input of the detection unit is connected to the detection terminals CONNECT_A, GND1, CONNECT_B and GND2, the output of the detection unit is connected to the The input end of the analysis unit is connected, and the output end of the analysis unit is connected with the input end of the output unit.

2. The connection terminal disconnection detection circuit according to claim 1, characterized in that: the detection unit is provided with a resistor R11, a capacitor C11, a resistor R21 and a capacitor C21;

One end of the resistor R11 is connected to the detection terminal CONNECT_A, the other end of the resistor R11 is connected to one end of the capacitor C11, and the other end of the capacitor C11 is connected to the detection terminal GND1;

One end of the resistor R21 is connected to the detection terminal CONNECT_B, the other end of the resistor R21 is connected to one end of the capacitor C21, and the other end of the capacitor C21 is connected to the detection terminal GND2;

The other end of the resistor R11 and the other end of the resistor R21 are connected to the input end of the analysis unit.

3. The connection terminal disconnection detection circuit according to claim 2, characterized in that: the resistor R11 is 470 ohms, the capacitor C11 is 100 nanofarads, the resistor R21 is 470 ohms, and the capacitor C21 is 100 nanofarads.

4. The connection terminal disconnection detection circuit according to claim 2 or 3, characterized in that: the analysis unit is provided with a resistor R12, an optocoupler ISO1, a diode D11, a diode D12, a resistor R22, an optocoupler ISO2, and a diode D21 and diode D22;

Terminal 1 of the optocoupler ISO1 is connected to +5V potential, terminal 2 of the optocoupler ISO1 and the anode of the diode D11 are connected to the other end of the resistor R11, terminal 3 of the optocoupler ISO1 is connected to GND3, One end of the resistor R12 is connected to a +3.3V potential, and the other end of the resistor R12 and the 4th end of the optocoupler ISO1 are connected to the anode of the diode D12;

Terminal 1 of the optocoupler ISO2, the cathode of the diode D11, and the cathode of the diode D21 are connected to +5V potential, and the terminal 2 of the optocoupler ISO2, the anode of the diode D21 and the other end of the resistor R21 connection, the 3rd end of the optocoupler ISO2 is connected to GND3, one end of the resistor R22 is connected to +3.3V potential, the other end of the resistor R22 and the 4th end of the optocoupler ISO2 are connected to the anode of the diode D22 ;

The cathode of the diode D12 and the cathode of the diode D22 are connected to the input end of the output unit.

5. The connection terminal disconnection detection circuit according to claim 4, characterized in that: the resistance R12 is 1.5 kilohm, and the resistance R22 is 1.5 kilohm.

6. The connection terminal disconnection detection circuit according to claim 4, characterized in that: the output unit is provided with a transistor Q3 of a resistor R3, a resistor R4, a resistor R5, a capacitor C3 and an NPN type;

One end of the resistor R3 is connected to the cathode of the diode D12 and the cathode of the diode D22, and the other end of the resistor R3, one end of the resistor R4, and one end of the capacitor C3 are connected to the base of the transistor Q3 , the other end of the resistor R4, the other end of the capacitor C3, and the emitter of the triode Q3 are connected to GND3, one end of the resistor R5 is connected to a +3.3V potential, and the other end of the resistor R5 is connected to the Collector connection of transistor Q3.

7. The connection terminal disconnection detection circuit according to claim 6, characterized in that: the resistor R3 is 1 kohm, the resistor R4 is 47 kohm, the resistor R5 is 4.7 kohm, and the capacitor C3 is 100 nanofarads.