Double-path output control detection circuit, system and method

Abstract

The invention discloses a two-way output control detection circuit which comprises a control circuit, a first detection sampling circuit, a second detection sampling circuit and a far-end matching load circuit. The control circuit comprises a driving control module, a first switch module and a second switch module, and the driving control module is used for controlling the first switch module and the second switch module to operate; the first switch module is used for switching and controlling a first state and a second state; the second switch module is used for switching and controlling a third state and a fourth state; the drive control module receives signals of the first detection sampling circuit and the second detection sampling circuit and controls the first switch module and the second switch module to operate. Three-wire system output is adopted, open circuit and short circuit faults of a line can be detected when equipment is not started, and normal operation of the equipment is ensured. The method has the advantages of low cost, simplicity in implementation, high reliability, reduced construction cost and the like.

Description

Technical Field

[0001] The present invention relates to the field of fire protection, and in particular to a dual-channel output control detection circuit, system and method. Background Art

[0002] The national standard "Fire linkage control system" GB16806 requires that for important fire-fighting equipment, when the equipment is not in working state, it is required to be able to detect circuit breakage and short circuit faults between the control center and the fire-fighting equipment.

[0003] When a fire occurs, a large number of fire fighting equipment needs to be started. The conventional equipment driving method is continuous power supply. When multiple devices are started, this will result in a large power output of the fire fighting power supply. However, the pulse trigger drive control method (i.e. dual-channel output control, when starting, the pulse trigger controls a group of remote equipment start relays, and when stopping, the pulse trigger controls the remote stop relay) only consumes power at the moment of controlling the start and stop, which greatly reduces the power consumption of the fire fighting power supply. The conventional trigger drive method on the market requires four wires, which consumes wire materials; there is a two-wire output method on the market, but it cannot realize the function of controlling the dual-channel output of two groups of relays. Summary of the invention

[0004] In order to solve the above technical problems, the present application provides a dual-output control detection circuit, including a control circuit, a first detection sampling circuit, a second detection sampling circuit and a remote matching load circuit;

[0005] The remote matching load circuit comprises a first input terminal, a second input terminal, a third input terminal and a fourth input terminal; a first load resistor and a series circuit formed by a first diode and a second diode connected in series are connected in parallel between the first input terminal and the second input terminal, and the anodes of the first diode and the second diode are electrically connected to the two ends of the first load resistor respectively; the third input terminal and the fourth input terminal are electrically connected to the cathodes of the first diode and the second diode respectively through the second load resistor and the third load resistor;

[0006] The control circuit includes a drive control module, a first switch module and a second switch module, wherein the drive control module is used to control the operation of the first switch module and the second switch module; the first switch module is used to switch and control a first state and a second state; and the second switch module is used to switch and control a third state and a fourth state;

[0007] In the first state, the first input terminal is connected to the VDD terminal, and the first detection sampling circuit is disconnected from the VDD terminal; in the second state, the first input terminal is grounded, and the first detection sampling circuit is connected to the VDD terminal; in the third state, the second input terminal is connected to the first detection sampling circuit, and the third input terminal is connected to the second sampling circuit; in the fourth state, the second input terminal is disconnected from the first detection sampling circuit, and the third input terminal is connected to the VDD terminal;

[0008] The driving control module receives signals from the first detection sampling circuit and the second detection sampling circuit, and controls the first switch module and the second switch module to operate.

[0009] Preferably, it further comprises a load device circuit, the load device circuit comprising a third switch module, a third diode and a device action feedback switch, the first end of the third switch module is connected to the first input end, the second end of the third switch module is connected to the cathode of the third diode, the anode of the third diode is connected to the second input end, and the device action feedback switch is connected between the third input end and the fourth input end;

[0010] The load device circuit also includes a fourth switch module and a fourth diode. The first end of the fourth switch module is connected to the first input end, the second end of the fourth switch module is connected to the cathode of the fourth diode, and the anode of the fourth diode is connected to the third input end.

[0011] Preferably, the first switch module includes a first relay, the first relay having a first coil, a first moving contact, a first static contact, a second static contact, a second moving contact, a third static contact, and a fourth static contact; the second switch module includes a second relay, the second relay having a second coil, a third moving contact, a fifth static contact, a sixth static contact, a fourth moving contact, a seventh static contact, and an eighth static contact; the first coil and the second coil are connected to the drive control module, the first moving contact is connected to the first input end, the first static contact is connected to VDD, and the second static contact is grounded; the second moving contact is connected to the fifth static contact, the third static contact is suspended, and the fourth static contact is connected to VDD; the third moving contact is connected to the second input end, and the fifth static contact is connected to VDD via a fourth resistor The fourth moving contact is connected to the third input terminal, the seventh static contact is grounded via the fifth resistor, and the eighth static contact is connected to VDD; in the first state, the first moving contact is connected to the first static contact, and the second moving contact is connected to the third static contact; in the second state, the first moving contact is connected to the second static contact, and the second moving contact is connected to the fourth static contact; in the third state, the third moving contact is connected to the fifth static contact, and the fourth moving contact is connected to the seventh static contact; in the fourth state, the third moving contact is connected to the sixth static contact, and the fourth moving contact is connected to the eighth static contact; the first detection sampling circuit is connected to the fifth static contact, and the second detection sampling circuit is connected to the seventh static contact.

[0012] Preferably, the drive control module includes a first control circuit, which includes a fifth input terminal, a first capacitor, a sixth resistor, a seventh resistor, a fifth diode, and a first transistor; the first capacitor is connected between the fifth input terminal and ground, the seventh resistor is connected between the fifth input terminal and ground, the first end of the sixth resistor is connected to the fifth input terminal, the second end of the sixth resistor is connected to the anode of the fifth diode, the cathode of the fifth diode is connected to the base of the first transistor, the collector of the first transistor is connected to one end of the first coil, and the emitter of the first transistor is grounded.

[0013] Preferably, the drive control module includes a second control circuit, which includes a sixth input terminal, a second capacitor, an eighth resistor, a ninth resistor, a sixth diode, and a second transistor; the second capacitor is connected between the sixth input terminal and ground, the ninth resistor is connected between the sixth input terminal and ground, the first end of the eighth resistor is connected to the sixth input terminal, the second end of the eighth resistor is connected to the anode of the sixth diode, the cathode of the sixth diode is connected to the base of the second transistor, the collector of the second transistor is connected to one end of the second coil, and the emitter of the second transistor is grounded.

[0014] Preferably, the first detection sampling circuit includes a first sampling input terminal, a first inductor, a tenth resistor, a third capacitor, a third triode, an eleventh resistor, a twelfth resistor, a thirteenth resistor and a first sampling output terminal; the first sampling input terminal is connected to the fifth static contact, the first inductor and the tenth resistor are connected in series between the first sampling input terminal and the base of the third triode, the collector of the third triode is connected to VCC, the emitter of the third triode is grounded via the twelfth resistor, the third capacitor is connected between the base of the third triode and the ground, the eleventh resistor is connected between the base of the third triode and the ground, and the thirteenth resistor is connected between the emitter of the third triode and the first sampling output terminal.

[0015] Preferably, the second detection sampling circuit includes a second sampling input terminal, a second inductor, a fourteenth resistor, a fourth capacitor, a fourth transistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor and a second sampling output terminal; the second sampling input terminal is connected to the seventh static contact, the second inductor and the fourteenth resistor are connected in series between the second sampling input terminal and the base of the fourth transistor, the collector of the fourth transistor is connected to VCC, the emitter of the fourth transistor is grounded via the sixteenth resistor, the fourth capacitor is connected between the base of the fourth transistor and the ground, the fifteenth resistor is connected between the base of the fourth transistor and the ground, and the seventeenth resistor is connected between the emitter of the fourth transistor and the second sampling output terminal.

[0016] The present application also provides a dual-channel output control detection system, which includes the dual-channel output control detection circuit as described above.

[0017] The present application also provides a dual-channel output control detection method, which uses the dual-channel output control detection circuit as described above, characterized in that the lines where the first input end, the second input end and the third input end are located are the first line, the second line and the third line respectively, and the method comprises the steps of:

[0018] Control the first switch module to switch to a first state, and control the second switch module to switch to a third state, and the first switch module and the second switch module do not operate;

[0019] If the sampling voltage of the first detection sampling circuit is within the first voltage range, and the sampling voltage of the second detection sampling circuit is within the second voltage range, then the first circuit, the second circuit, and the third circuit are all normal;

[0020] If the sampling voltage of the first detection sampling circuit and the sampling voltage of the second detection sampling circuit are both 0, the first circuit is open;

[0021] If the sampling voltage of the first detection sampling circuit is 0 and the sampling voltage of the second detection sampling circuit is not 0, the second circuit is open;

[0022] If the sampling voltage of the first detection sampling circuit is not 0 and the sampling voltage of the second detection sampling circuit is 0, the third circuit is open;

[0023] If only the sampling voltage of the first detection sampling circuit is within the third voltage range, the first circuit and the second circuit are short-circuited;

[0024] If only the sampling voltage of the second detection sampling circuit is within the fourth voltage range, the first circuit and the third circuit are short-circuited;

[0025] If the sampling voltage of the first detection sampling circuit and the sampling voltage of the second detection sampling circuit are both within the fifth voltage range, the second circuit and the third circuit are short-circuited.

[0026] Preferably, it includes:

[0027] Control the first switch module to switch to the second state, and control the second switch module to switch to the third state, the first relay is actuated, the second relay is inactive, and the third switch module is driven to actuate, thereby driving the starting device, and the device action feedback switch is closed;

[0028] Control the first switch module to switch to the first state, and control the second switch module to switch to the third state, the first relay and the third switch module resume operation, the sampling voltage of the first detection sampling circuit is a sixth voltage range value, the sampling voltage of the second detection sampling circuit is a seventh voltage range value, and the control circuit obtains feedback of device startup according to the sixth voltage range value and the seventh voltage range value;

[0029] The method also includes:

[0030] Control the first switch module to switch to the second state, and control the second switch module to switch to the fourth state, the first relay and the second relay are actuated, driving the fourth switch module to actuate, thereby driving the remote device to stop, and the device action feedback switch is disconnected;

[0031] The first switch module is controlled to switch to the first state, and the second switch module is controlled to switch to the third state, the first relay, the second relay and the fourth switch module resume operation, the sampling voltage of the first detection sampling circuit is a value in the eighth voltage range, the sampling voltage of the second detection sampling circuit is a value in the ninth voltage range, and the control circuit obtains feedback that the device stops according to the eighth voltage range value and the ninth voltage range value.

[0032] The dual-channel output control detection circuit, system and method of the present invention have the following beneficial effects: the present application adopts a three-wire output, and can detect line open circuit and short circuit faults when the device is not started, ensuring that the device can operate normally. It has the advantages of low cost, simple implementation, high reliability, and reduced engineering cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work:

[0034] Figure 1 It is a schematic diagram of the structure of a dual-channel output control detection circuit in a preferred embodiment of the present invention;

[0035] Figure 2 It is a structural schematic diagram of a remote matching load circuit of a dual-channel output control detection circuit in a preferred embodiment of the present invention;

[0036] Figure 3 It is a circuit diagram of a load device circuit of a dual-channel output control detection circuit according to a preferred embodiment of the present invention;

[0037] Figure 4 It is a circuit diagram of a driving control module of a dual-channel output control detection circuit according to a preferred embodiment of the present invention;

[0038] Figure 5 It is a circuit diagram of a first detection sampling circuit of a dual-channel output control detection circuit in a preferred embodiment of the present invention;

[0039] Figure 6 It is a circuit diagram of a second detection sampling circuit of a dual-output control detection circuit in a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0041] See also Figure 1 , Figure 1 A structural schematic diagram of a dual-output control detection circuit provided in the present application, a dual-output control detection circuit, including a control circuit 1, a first detection sampling circuit 3, a second detection sampling circuit 4 and a remote matching load circuit 2.

[0042] In one embodiment, if Figure 2 As shown, it is a structural schematic diagram of a remote matching load circuit of a dual-output control detection circuit provided by the present application, and the remote matching load circuit includes a first input terminal OUT1, a second input terminal OUT2, a third input terminal OUT3 and a fourth input terminal OUT4; a first load resistor R15 and a series circuit formed by a first diode D5 and a second diode D6 connected in series are connected in parallel between the first input terminal OUT1 and the second input terminal OUT2, and the positive electrodes of the first diode D5 and the second diode D6 are electrically connected to the two ends of the first load resistor R15 respectively; the third input terminal OUT3 and the fourth input terminal OUT4 are electrically connected to the negative electrodes of the first diode D5 and the second diode D6 through the second load resistor R16 and the third load resistor R17 respectively.

[0043] See also Figure 1 The control circuit 1 includes a driving control module 11, a first switch module 12 and a second switch module 13. The driving control module 11 is used to control the operation of the first switch module 12 and the second switch module 13; the first switch module 12 is used to switch and control the first state and the second state; the second switch module 13 is used to switch and control the third state and the fourth state.

[0044] In the first state, the first input terminal OUT1 is connected to the VDD terminal, and the first detection sampling circuit 3 is disconnected from the VDD terminal; in the second state, the first input terminal OUT1 is grounded, and the first detection sampling circuit 3 is connected to the VDD terminal; in the third state, the second input terminal OUT2 is connected to the first detection sampling circuit 3, and the third input terminal OUT3 is connected to the second sampling circuit 4; in the fourth state, the second input terminal OUT2 is disconnected from the first detection sampling circuit 3, and the third input terminal OUT3 is connected to the VDD terminal.

[0045] The driving control module 11 receives signals from the first detection sampling circuit 3 and the second detection sampling circuit 4 , and controls the first switch module 12 and the second switch module 13 to operate.

[0046] The dual-channel output control detection circuit provided by the present application adopts a three-wire output, and can detect line open circuit and short circuit faults when the device is not started, ensuring that the device can operate normally. It has the advantages of low cost, simple implementation, high reliability, and reduced engineering cost.

[0047] like Figure 3 As shown, it is a structural schematic diagram of a load device circuit of a dual-channel output control detection circuit of a preferred embodiment of the present invention; the dual-channel output control detection circuit also includes a load device circuit, the load device circuit includes a third switch module K3, a third diode D7 and a device action feedback switch J, the first end of the third switch module K3 is connected to the first input end OUT1, the second end of the third switch module K3 is connected to the cathode of the third diode D7, the anode of the third diode D7 is connected to the second input end OUT2, and the device action feedback switch J is connected between the third input end OUT3 and the fourth input end OUT4.

[0048] The load device circuit also includes a fourth switch module K4 and a fourth diode D8. The first end of the fourth switch module K4 is connected to the first input end OUT1, the second end of the fourth switch module K4 is connected to the cathode of the fourth diode D8, and the anode of the fourth diode D8 is connected to the third input end OUT.

[0049] like Figure 4FIG. 1 is a circuit diagram of a driving control module of a dual-output control detection circuit according to a preferred embodiment of the present invention. The first switch module 12 includes a first relay K1, which has a first coil, a first moving contact, a first static contact, a second static contact, a second moving contact, a third static contact, and a fourth static contact; the second switch module 13 includes a second relay K2, which has a second coil, a third moving contact, a fifth static contact, a sixth static contact, a fourth moving contact, a seventh static contact, and an eighth static contact; the first coil and the second coil are connected to the drive control module 11, the first moving contact is connected to the first input terminal OUT1, the first static contact is connected to VDD, and the second static contact is grounded; the second moving contact is connected to the fifth static contact, the third static contact is suspended, and the fourth static contact is connected to VDD; the third moving contact is connected to the second input terminal OUT2, the fifth static contact is grounded via the fourth resistor R12, and the sixth static contact is suspended; the fourth moving contact is connected to the third input terminal OUT3, the seventh static contact is grounded via the fifth resistor R11, and the eighth static contact is connected to VDD. In the first state, the first moving contact is connected to the first static contact, and the second moving contact is connected to the third static contact; in the second state, the first moving contact is connected to the second static contact, and the second moving contact is connected to the fourth static contact; in the third state, the third moving contact is connected to the fifth static contact, and the fourth moving contact is connected to the seventh static contact; in the fourth state, the third moving contact is connected to the sixth static contact, and the fourth moving contact is connected to the eighth static contact; the first detection sampling circuit 3 is connected to the fifth static contact, and the second detection sampling circuit 4 is connected to the seventh static contact.

[0050] In one embodiment, the drive control module 11 includes a first control circuit 111, and the first control circuit 111 includes a fifth input terminal CONTROL1, a first capacitor C3, a sixth resistor R9, a seventh resistor R10, a fifth diode D2, and a first transistor Q3; the first capacitor C3 is connected between the fifth input terminal CONTROL1 and ground, the seventh resistor R10 is connected between the fifth input terminal CONTROL1 and ground, the first end of the sixth resistor R9 is connected to the fifth input terminal CONTROL1, the second end of the sixth resistor R9 is connected to the anode of the fifth diode D2, the cathode of the fifth diode D2 is connected to the base of the first transistor Q3, the collector of the first transistor Q3 is connected to one end of the first coil, and the emitter of the first transistor Q3 is grounded.

[0051] In one embodiment, the drive control module 11 includes a second control circuit 112, and the second control circuit 112 includes a sixth input terminal CONTROL2, a second capacitor C4, an eighth resistor R13, a ninth resistor R14, a sixth diode D4, and a second triode Q4; the second capacitor C4 is connected between the sixth input terminal CONTROL2 and ground, the ninth resistor R14 is connected between the sixth input terminal CONTROL2 and ground, the first end of the eighth resistor R13 is connected to the sixth input terminal CONTROL2, the second end of the eighth resistor R13 is connected to the anode of the sixth diode D4, the cathode of the sixth diode D4 is connected to the base of the second triode Q4, the collector of the second triode Q4 is connected to one end of the second coil, and the emitter of the second triode Q4 is grounded.

[0052] In one embodiment, the first detection sampling circuit 3 includes a first sampling input terminal ENTA, a first inductor L1, a tenth resistor R1, a third capacitor C1, a third triode Q1, an eleventh resistor R2, a twelfth resistor R4, a thirteenth resistor R3 and a first sampling output terminal CHECK_A; the first sampling input terminal ENTA is connected to the fifth static contact, the first inductor L1 and the tenth resistor R1 are connected in series between the first sampling input terminal ENTA and the base of the third triode Q1, the collector of the third triode Q1 is connected to VCC, the emitter of the third triode Q1 is grounded via the twelfth resistor R4, the third capacitor C1 is connected between the base of the third triode Q1 and the ground, the eleventh resistor R2 is connected between the base of the third triode Q1 and the ground, and the thirteenth resistor R3 is connected between the emitter of the third triode Q1 and the first sampling output terminal CHECK_A.

[0053] In one embodiment, the second detection sampling circuit 4 includes a second sampling input terminal ENTB, a second inductor L2, a fourteenth resistor R5, a fourth capacitor C2, a fourth transistor Q2, a fifteenth resistor R6, a sixteenth resistor R8, a seventeenth resistor R7 and a second sampling output terminal CHECK_B; the second sampling input terminal ENTB is connected to the seventh static contact, the second inductor L2 and the fourteenth resistor R5 are connected in series between the second sampling input terminal ENTB and the base of the fourth transistor Q2, the collector of the fourth transistor Q2 is connected to VCC, the emitter of the fourth transistor Q2 is grounded via the sixteenth resistor R8, the fourth capacitor C2 is connected between the base of the fourth transistor Q2 and the ground, the fifteenth resistor R6 is connected between the base of the fourth transistor Q2 and the ground, and the seventeenth resistor R7 is connected between the emitter of the fourth transistor Q2 and the second sampling output terminal CHECK_B.

[0054] The first inductor L1 and the second inductor L2 play a role in preventing circuit pulse interference.

[0055] The present application also provides a dual-channel output control and feedback detection system, the system comprising the dual-channel output control detection circuit as described above.

[0056] The present application also provides a dual-channel output control detection method, using the dual-channel output control detection circuit as described above, wherein the lines where the first input terminal, the second input terminal and the third input terminal are located are respectively the first line, the second line and the third line, and the method comprises the steps of:

[0057] The first switch module 12 is controlled to switch to the first state, and the second switch module 13 is controlled to switch to the third state; the first switch module 12 and the second switch module 13 are not operated.

[0058] If the sampling voltage of the first detection sampling circuit 3 is within the first voltage range, and the sampling voltage of the second detection sampling circuit 4 is within the second voltage range, then the first circuit, the second circuit, and the third circuit are all normal.

[0059] If the sampling voltage of the first detection sampling circuit 3 and the sampling voltage of the second detection sampling circuit 4 are both 0, the first circuit is open.

[0060] If the sampling voltage of the first detection sampling circuit 3 is 0 and the sampling voltage of the second detection sampling circuit is not 0, the second circuit is open.

[0061] If the sampling voltage of the first detection sampling circuit 3 is not 0 and the sampling voltage of the second detection sampling circuit is 0, the third circuit is open.

[0062] If only the sampling voltage of the first detection sampling circuit 3 is within the third voltage range, the first circuit and the second circuit are short-circuited.

[0063] If only the sampling voltage of the second detection sampling circuit 4 is within the fourth voltage range, the first circuit and the third circuit are short-circuited.

[0064] If the sampling voltage of the first detection sampling circuit 3 and the sampling voltage of the second detection sampling circuit 4 are both within the fifth voltage range, the second circuit and the third circuit are short-circuited.

[0065] In one embodiment, the dual-channel output control detection method further includes:

[0066] The first switch module 12 is controlled to switch to the second state, and the second switch module 13 is controlled to switch to the third state, the first relay K1 is actuated, the second relay K2 is inactive, and the third switch module is driven to actuate, thereby driving the starting device, and the device action feedback switch is closed.

[0067] The first switch module 12 is controlled to switch to the first state, and the second switch module 13 is controlled to switch to the third state, the first relay K1 and the third switch module resume operation, the sampling voltage of the first detection sampling circuit 3 is a sixth voltage range value, the sampling voltage of the second detection sampling circuit 4 is a seventh voltage range value, and the control circuit obtains feedback of device startup according to the sixth voltage range value and the seventh voltage range value.

[0068] The method also includes:

[0069] The first switch module 12 is controlled to switch to the second state, and the second switch module 13 is controlled to switch to the fourth state, the first relay K1 and the second relay K2 are actuated, driving the fourth switch module to actuate, thereby driving the remote device to stop, and the device action feedback switch is disconnected.

[0070] The first switch module is controlled to switch to the first state, and the second switch module is controlled to switch to the third state, the first relay K1, the second relay K2 and the fourth switch module K4 resume operation, the sampling voltage of the first detection sampling circuit 3 is the eighth voltage range value, the sampling voltage of the second detection sampling circuit is the ninth voltage range value, and the control circuit obtains feedback that the equipment stops according to the eighth voltage range value and the ninth voltage range value.

[0071] The dual-channel output control and feedback detection method provided by the present application adopts a three-wire output, can drive two groups of remote relays (i.e., the third switch module K3 and the fourth switch module K4, corresponding to the device start and the device stop), and can also feedback the device start signal and the device stop signal to the control circuit, and can detect the line open circuit and short circuit faults when the device is not started, to ensure that the device can operate normally. It has the advantages of low cost, simple implementation, high reliability, and reduced engineering cost.

[0072] The following example takes VCC as 5V and VDD as 24V.

[0073] The first switch module 12 is controlled to switch to the first state, and the second switch module 13 is controlled to switch to the third state, that is, when the fifth input terminal CONTROL1 and the sixth input terminal of the control circuit are both input with a low level, the first relay K1 and the second relay K2 do not operate, the first output terminal OUT1 outputs VDD, to the load first load resistor R15, back to the second output terminal OUT2, to the fourth resistor R12 grounded, the first sampling circuit performs sampling detection from the first sampling input terminal ENTA, and the first sampling output terminal CHECKA outputs the sampling voltage. At this time, the voltage of the first sampling input terminal NETA is VDD*(R12 / (R15+R12)); the sampling voltage range value corresponding to the first sampling output terminal CHECKA is 0.6~4.1V. In addition, the first voltage output terminal OUT1 outputs VDD to the load first diode D5, to the resistor second load resistor R16, back to the third output terminal OUT3, to the fifth resistor R11 grounded, the second detection sampling circuit performs sampling detection from the second sampling input terminal NETB, and the second sampling output terminal CHECKB outputs the sampling voltage. At this time, the voltage of the second sampling input terminal NETB is (VDD-VD5)*(R11 / (R11+R16), VD5 is the voltage drop of the diode D5; the corresponding sampling voltage range of the second sampling output terminal CHECKB is 0.6~1.5V.

[0074] Therefore, if the sampling voltage of the first detection sampling circuit is within the first voltage range, and the sampling voltage of the second detection sampling circuit is within the second voltage range, then the first circuit, the second circuit, and the third circuit are all normal.

[0075] If the sampling voltage of the first detection sampling circuit and the sampling voltage of the second detection sampling circuit are both 0, correspondingly NETA and NETB are both 0, and the first circuit is open.

[0076] If the sampling voltage of the first detection sampling circuit is 0, and the sampling voltage of the second detection sampling circuit is not 0, corresponding to NETA being 0 and NETB being a normal value, the second circuit is open.

[0077] If the sampling voltage of the first detection sampling circuit is not 0, and the sampling voltage of the second detection sampling circuit is 0, corresponding to NETA being normal and NETB being 0, the third circuit is open.

[0078] If only the sampling voltage of the first detection sampling circuit is within the third voltage range, corresponding to NETA being VDD and NETB being a normal value, then the first circuit and the second circuit are short-circuited.

[0079] If only the sampling voltage of the second detection sampling circuit is within the fourth voltage range, corresponding to NETA being normal and NETB being VDD, the first circuit and the third circuit are short-circuited.

[0080] If the sampling voltage of the first detection sampling circuit and the sampling voltage of the second detection sampling circuit are both within the fifth voltage range, and the corresponding NETA and NETB are equal, then the second line and the third line are short-circuited.

[0081] In one embodiment, the third switch module is a third relay, and the control method for the remote third relay K3 is as follows (pulse control mode, action time 1 to 2 seconds): the first switch module K1 is controlled to switch to the second state, and the second switch module K2 is controlled to switch to the third state, that is, the fifth input terminal CONTROL1 inputs a high level, and the sixth input terminal CONTROL2 inputs a low level, the first relay K1 is actuated, the first output terminal OUT1 outputs ground, the second output terminal OUT2 outputs VDD, and the remote third relay K3 is driven to actuate. K3 is actuated to drive the remote on-site startup device. After the pulse control ends, the first switch module is controlled to switch to the first state, and the second switch module is controlled to switch to the third state, the first relay K1 and the third relay K3 are restored, and the remote device action feedback signal closes the device action feedback switch J (that is, Figure 3 The load on the 3rd and 4th feet is closed), at this time, the first output terminal OUT1 outputs VDD, to the first diode D5, to the second load resistor R16 and the third load resistor R17 (because the device action feedback switch J is closed, the second load resistor R16 and the third load resistor R17 are actually connected in parallel, reducing the value of the second load resistor R16. The value of the second sampling input terminal NETB is closely related to whether R17 is connected in parallel to R16. Taking the appropriate value of the third load resistor R17 can correctly determine whether the controlled device is in action), return to the third output terminal OUT3, to the fifth resistor R11, the second detection sampling circuit performs sampling detection from the second sampling input terminal NETB, and the seventh voltage range value of the second sampling output terminal CHECKB is 1.6~4.1V; and the first detection sampling circuit performs sampling detection from the first sampling input terminal NETA, and the sixth voltage range value of the first sampling output terminal CHECKA is 2.0~3.8V. The feedback response of the device startup is obtained through the values ​​of the sixth voltage range value CHECKA and the seventh voltage range value CHECKB.

[0082] In one embodiment, the fourth switch module is the fourth relay, and the remote fourth relay K4 action control method (pulse control mode, action time 1 to 2 seconds) is as follows: the first switch module K1 is controlled to switch to the second state, and the second switch module K2 is controlled to switch to the fourth state, that is, the fifth input terminal CONTROL1 and the sixth input terminal CONTROL2 input high level, the first relay K1 and the second relay K2 are actuated, the second output terminal OUT2 is suspended, the first output terminal OUT1 outputs ground, and the third output terminal OUT3 outputs VDD, driving the remote fourth relay K4 to act, driving the remote device to stop. After the device stops, the device action feedback switch J is disconnected. After the pulse control ends, that is, the first switch module is controlled to switch to the first state, and the second switch module is controlled to switch to the third state, the first relay K1, the second relay K2 and the fourth relay K4 are restored, and the voltages of the circuit state detection points NETA and NETB return to normal. The sampling voltage of the first detection sampling circuit is the eighth voltage range value (i.e., the first voltage range value), and the sampling voltage of the second detection sampling circuit is the ninth voltage range value (i.e., the second voltage range value), and the control circuit obtains feedback that the equipment stops according to the eighth voltage range value and the ninth voltage range value.

[0083] It should be noted that, in this specification, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0084] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A dual-output control detection circuit, characterized in that: It includes a control circuit, a first detection sampling circuit, a second detection sampling circuit and a remote matching load circuit; The remote matching load circuit comprises a first input terminal, a second input terminal, a third input terminal and a fourth input terminal; a first load resistor and a series circuit formed by a first diode and a second diode connected in series are connected in parallel between the first input terminal and the second input terminal, and the anodes of the first diode and the second diode are electrically connected to the two ends of the first load resistor respectively; the third input terminal and the fourth input terminal are electrically connected to the cathodes of the first diode and the second diode respectively through the second load resistor and the third load resistor; The control circuit includes a drive control module, a first switch module and a second switch module, wherein the drive control module is used to control the operation of the first switch module and the second switch module; the first switch module is used to switch and control a first state and a second state; and the second switch module is used to switch and control a third state and a fourth state; In the first state, the first input terminal is connected to the VDD terminal, and the first detection sampling circuit is disconnected from the VDD terminal; in the second state, the first input terminal is grounded, and the first detection sampling circuit is connected to the VDD terminal; in the third state, the second input terminal is connected to the first detection sampling circuit, and the third input terminal is connected to the second sampling circuit; in the fourth state, the second input terminal is disconnected from the first detection sampling circuit, and the third input terminal is connected to the VDD terminal; The driving control module receives signals from the first detection sampling circuit and the second detection sampling circuit, and controls the first switch module and the second switch module to operate.

2. The dual output control detection circuit according to claim 1, characterized in that: It also includes a load device circuit, which includes a third switch module, a third diode and a device action feedback switch, wherein a first end of the third switch module is connected to the first input end, a second end of the third switch module is connected to a cathode of the third diode, an anode of the third diode is connected to the second input end, and the device action feedback switch is connected between the third input end and the fourth input end; The load device circuit also includes a fourth switch module and a fourth diode. The first end of the fourth switch module is connected to the first input end, the second end of the fourth switch module is connected to the cathode of the fourth diode, and the anode of the fourth diode is connected to the third input end.

3. The dual output control detection circuit according to claim 2, characterized in that: The first switch module includes a first relay, the first relay having a first coil, a first moving contact, a first static contact, a second static contact, a second moving contact, a third static contact, and a fourth static contact; the second switch module includes a second relay, the second relay having a second coil, a third moving contact, a fifth static contact, a sixth static contact, a fourth moving contact, a seventh static contact, and an eighth static contact; the first coil and the second coil are connected to the drive control module, the first moving contact is connected to the first input end, the first static contact is connected to VDD, and the second static contact is grounded; the second moving contact is connected to the fifth static contact, the third static contact is suspended, and the fourth static contact is connected to VDD; the third moving contact is connected to the second input end, the fifth static contact is grounded via a fourth resistor, and the sixth static contact is suspended; The fourth moving contact is connected to the third input terminal, the seventh static contact is grounded via a fifth resistor, and the eighth static contact is connected to VDD; in the first state, the first moving contact is connected to the first static contact, and the second moving contact is connected to the third static contact; in the second state, the first moving contact is connected to the second static contact, and the second moving contact is connected to the fourth static contact; In the third state, the third moving contact is connected to the fifth static contact, and the fourth moving contact is connected to the seventh static contact; in the fourth state, the third moving contact is connected to the sixth static contact, and the fourth moving contact is connected to the eighth static contact; the first detection sampling circuit is connected to the fifth static contact, and the second detection sampling circuit is connected to the seventh static contact.

4. The dual output control detection circuit according to claim 3, characterized in that: The drive control module includes a first control circuit, which includes a fifth input terminal, a first capacitor, a sixth resistor, a seventh resistor, a fifth diode, and a first transistor; the first capacitor is connected between the fifth input terminal and ground, the seventh resistor is connected between the fifth input terminal and ground, the first end of the sixth resistor is connected to the fifth input terminal, the second end of the sixth resistor is connected to the anode of the fifth diode, the cathode of the fifth diode is connected to the base of the first transistor, the collector of the first transistor is connected to one end of the first coil, and the emitter of the first transistor is grounded.

5. The dual output control detection circuit according to claim 3, characterized in that: The drive control module includes a second control circuit, which includes a sixth input terminal, a second capacitor, an eighth resistor, a ninth resistor, a sixth diode, and a second transistor; the second capacitor is connected between the sixth input terminal and ground, the ninth resistor is connected between the sixth input terminal and ground, the first end of the eighth resistor is connected to the sixth input terminal, the second end of the eighth resistor is connected to the anode of the sixth diode, the cathode of the sixth diode is connected to the base of the second transistor, the collector of the second transistor is connected to one end of the second coil, and the emitter of the second transistor is grounded.

6. The dual output control detection circuit according to claim 3, characterized in that: The first detection sampling circuit includes a first sampling input terminal, a first inductor, a tenth resistor, a third capacitor, a third triode, an eleventh resistor, a twelfth resistor, a thirteenth resistor and a first sampling output terminal; the first sampling input terminal is connected to the fifth static contact, the first inductor and the tenth resistor are connected in series between the first sampling input terminal and the base of the third triode, the collector of the third triode is connected to VCC, the emitter of the third triode is grounded via the twelfth resistor, the third capacitor is connected between the base of the third triode and the ground, the eleventh resistor is connected between the base of the third triode and the ground, and the thirteenth resistor is connected between the emitter of the third triode and the first sampling output terminal.

7. The dual output control detection circuit according to claim 3, characterized in that: The second detection sampling circuit includes a second sampling input terminal, a second inductor, a fourteenth resistor, a fourth capacitor, a fourth transistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor and a second sampling output terminal; the second sampling input terminal is connected to the seventh static contact, the second inductor and the fourteenth resistor are connected in series between the second sampling input terminal and the base of the fourth transistor, the collector of the fourth transistor is connected to VCC, the emitter of the fourth transistor is grounded via the sixteenth resistor, the fourth capacitor is connected between the base of the fourth transistor and the ground, the fifteenth resistor is connected between the base of the fourth transistor and the ground, and the seventeenth resistor is connected between the emitter of the fourth transistor and the second sampling output terminal.

8. A dual-channel output control detection system, characterized in that: The system comprises the dual-output control detection circuit as described in any one of claims 1-7.

9. A dual-channel output control detection method, using the dual-channel output control detection circuit as described in any one of claims 1 to 7, characterized in that: The lines where the first input terminal, the second input terminal and the third input terminal are located are the first line, the second line and the third line respectively, and the method comprises the steps of: Control the first switch module to switch to a first state, and control the second switch module to switch to a third state, and the first switch module and the second switch module do not operate; If the sampling voltage of the first detection sampling circuit is within the first voltage range, and the sampling voltage of the second detection sampling circuit is within the second voltage range, then the first circuit, the second circuit, and the third circuit are all normal; If the sampling voltage of the first detection sampling circuit and the sampling voltage of the second detection sampling circuit are both 0, the first circuit is open; If the sampling voltage of the first detection sampling circuit is 0 and the sampling voltage of the second detection sampling circuit is not 0, the second circuit is open; If the sampling voltage of the first detection sampling circuit is not 0 and the sampling voltage of the second detection sampling circuit is 0, the third circuit is open; If only the sampling voltage of the first detection sampling circuit is within the third voltage range, the first circuit and the second circuit are short-circuited; If only the sampling voltage of the second detection sampling circuit is within the fourth voltage range, the first circuit and the third circuit are short-circuited; If the sampling voltage of the first detection sampling circuit and the sampling voltage of the second detection sampling circuit are both within the fifth voltage range, the second circuit and the third circuit are short-circuited.

10. The dual-channel output control detection method according to claim 9, characterized in that: include: Control the first switch module to switch to the second state, and control the second switch module to switch to the third state, the first relay is actuated, the second relay is inactive, and the third switch module is driven to actuate, thereby driving the starting device, and the device action feedback switch is closed; Control the first switch module to switch to the first state, and control the second switch module to switch to the third state, the first relay and the third switch module resume operation, the sampling voltage of the first detection sampling circuit is a sixth voltage range value, the sampling voltage of the second detection sampling circuit is a seventh voltage range value, and the control circuit obtains feedback of device startup according to the sixth voltage range value and the seventh voltage range value; The method also includes: Control the first switch module to switch to the second state, and control the second switch module to switch to the fourth state, the first relay and the second relay are actuated, driving the fourth switch module to actuate, thereby driving the remote device to stop, and the device action feedback switch is disconnected; The first switch module is controlled to switch to the first state, and the second switch module is controlled to switch to the third state, the first relay, the second relay and the fourth switch module resume operation, the sampling voltage of the first detection sampling circuit is the eighth voltage range value, the sampling voltage of the second detection sampling circuit is the ninth voltage range value, and the control circuit obtains feedback that the equipment stops according to the eighth voltage range value and the ninth voltage range value.

Images