A fire-fighting equipment startup and status detection circuit, system and method

Abstract

The present invention provides a startup and status detection circuit, system and method for fire-fighting equipment, wherein the positive electrode of a first diode is connected to a first power input port; the first end of a control switch is connected to a second power input port; the positive electrode of a second diode is connected to a second end of the control switch; the negative electrode of the first diode is connected to a negative electrode of the second diode; the first end of a sampling resistor and a non-inverting input end of a current detection amplifier are both connected to the negative electrode of the first diode; the inverting input end of the current detection amplifier is connected to the second end of the sampling resistor; the output end of the current detection amplifier is connected to a detection port; the first end of a coil of a relay and a first end of a normally open contact are both connected to the second end of the sampling resistor; the second end of the normally open contact is connected to the first end of a second resistor; the second end of the coil and the second end of the second resistor are both grounded, and the fire-fighting equipment is connected to another group of normally open contacts of the relay; the production and installation and debugging costs are reduced.

Description

Technical Field

[0001] The present invention relates to the field of fire fighting technology, and in particular to a startup and status detection circuit, system and method for fire fighting equipment. Background Art

[0002] The multi-line module in the fire alarm system is used to start the external fire-fighting equipment. Due to the differences in performance characteristics of the fire-fighting equipment produced by different manufacturers, coupled with the influence of the wiring distance and the complex environment of the construction site, the status detection of the external fire-fighting equipment is unstable in actual application. And most of the controlled equipment on the market currently adopts three-wire or four-wire control, that is, three wires from the control panel to the controlled equipment, three ports for start, feedback and common, and the start and feedback share a common ground wire; or four wires from the control panel to the controlled equipment, that is, two wires for start and two wires for feedback; both methods have a disadvantage that if the control equipment on site is far away from the control room, the signal is easily interfered and the wiring is complicated and the cost is very high. There are also methods that use two-wire control, such as the patent with publication number CN110221201A, which discloses a module for detecting the feedback of multi-line control equipment and its implementation method. Since it uses a pulse generating device for detection, the state is determined by detecting the fluctuation of the current pulse. Although this method can improve a certain degree of anti-interference ability, it is still susceptible to interference from other signals when the current pulse is generated, and the state detection is inaccurate and the false start will occur. Therefore, it is necessary to provide a solution to solve the problem of unstable fire equipment status detection caused by different manufacturers and different environments, so as to reduce environmental interference and save wire costs. Summary of the invention

[0003] The purpose of the present invention is to provide a fire-fighting equipment startup and status detection circuit, system and method to solve the problem of unstable fire-fighting equipment status detection caused by different manufacturers and different environments, thereby reducing environmental interference and saving wire costs.

[0004] The present invention provides a startup and status detection circuit of fire-fighting equipment, comprising a first power input port, a second power input port, a control switch, a first diode, a second diode, a sampling resistor, a current detection amplifier, a relay, a detection port and a second resistor; the positive electrode of the first diode is connected to the first power input port; the first end of the control switch is connected to the second power input port; the positive electrode of the second diode is connected to the second end of the control switch; the negative electrode of the first diode is connected to the negative electrode of the second diode; the first end of the sampling resistor and the in-phase input end of the current detection amplifier are both connected to the negative electrode of the first diode; the inverting input end of the current detection amplifier is connected to the second end of the sampling resistor; the output end of the current detection amplifier is connected to the detection port; the first end of the coil of the relay and the first end of one group of normally open contacts are both connected to the second end of the sampling resistor; the second end of the group of normally open contacts is connected to the first end of the second resistor; the second end of the coil and the second end of the second resistor are both grounded; and the fire-fighting equipment is connected to another group of normally open contacts of the relay.

[0005] Furthermore, the input voltage of the first power input port is 10V; the input voltage of the second power input port is 24V.

[0006] Furthermore, the control switch is an electronic switch or a mechanical switch.

[0007] Furthermore, the startup and status detection circuit also includes a fuse; the cathode of the first diode and the cathode of the second diode are both connected to the first end of the fuse; and the second end of the fuse is connected to the first end of the sampling resistor.

[0008] In a second aspect, the present invention provides a fire-fighting equipment startup and status detection system, including a controller, and a plurality of the above-mentioned startup and status detection circuits connected to the controller via a detection port.

[0009] In a third aspect, the present invention provides a method for starting and detecting the state of fire-fighting equipment, which is applied to the above-mentioned starting and detecting the state of the equipment, comprising:

[0010] S1. After the system is built, power on the simulated circuit to generate current values ​​corresponding to several states, including normal, short circuit, open circuit, feedback, start feedback, and start without feedback, and store the current values ​​corresponding to each state;

[0011] S2. After the system runs normally, the current at both ends of the sampling resistor is detected in real time, and the detected current value is compared with the current value stored in the controller. The actual status of the circuit and the external fire-fighting equipment is determined based on the comparison result;

[0012] S3. Analyze whether the relay needs to be replaced or calibrated based on the actual status, and if necessary, re-execute steps S1-S2.

[0013] Furthermore, S1 includes:

[0014] When simulating a normal situation, a 10V voltage that is not enough to start the relay is passed through the first power input port, the control switch is disconnected, the current value I1 across the sampling resistor is detected and the current value is stored in the controller;

[0015] When simulating a short circuit, a 10V voltage that is not enough to start the relay is passed through the first power input port, and the control switch is disconnected. At this time, the simulated detection circuit is short-circuited, and the current value I2 at both ends of the sampling resistor is detected and stored in the controller;

[0016] When simulating an open circuit, a 10V voltage that is not enough to start the relay is passed through the first power input port, and the control switch is disconnected. At this time, the simulated detection circuit is open, and the current value I3 at both ends of the sampling resistor is detected and stored in the controller;

[0017] When simulating feedback, a 10V voltage that is not enough to start the relay is passed through the first power input port, and the control switch is disconnected. At this time, the external fire-fighting equipment is manually started, and the current value I4 at both ends of the sampling resistor is detected and stored in the controller;

[0018] When simulating the startup feedback, a 10V voltage is input to the first power input port, and a 24V voltage sufficient to start the relay is input to the second power input port. After closing the control switch, the relay starts normally. At this time, the external fire-fighting equipment starts successfully, and the current value I5 at both ends of the sampling resistor is detected and stored in the controller;

[0019] When the analog start-up has no feedback, a 10V voltage is input to the first power input port, and a 24V voltage sufficient to start the relay is input to the second power input port. After the control switch is closed, the relay starts normally. If the external fire-fighting equipment cannot be started due to other reasons, the current value I6 across the sampling resistor is detected at this time and stored in the controller.

[0020] The beneficial effect that can be achieved by the present invention is: the startup and status detection circuit of the fire-fighting equipment provided by the present invention realizes the detection of the startup and status of the fire-fighting equipment through a two-wire method, which can solve the problem of unstable status detection of fire-fighting equipment caused by different manufacturers and different environments, and can also avoid interference caused by other signals on site. At the same time, it simplifies the circuit and reduces the production and installation and debugging costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments of the present invention are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 A schematic diagram of a startup and status detection circuit of a fire-fighting device provided by an embodiment of the present invention;

[0023] Figure 2 A schematic diagram of the topological structure of a fire-fighting equipment startup and status detection system provided by an embodiment of the present invention;

[0024] Figure 3 A schematic flow chart of a method for starting and detecting the status of fire-fighting equipment provided in an embodiment of the present invention.

[0025] Icon: 10-start and status detection system; 100-start and status detection circuit; 200-fire equipment power supply circuit; 300-controller. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0027] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. At the same time, in the description of the present invention, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0028] Please see Figure 1 , Figure 1 A schematic diagram of a startup and status detection circuit for fire fighting equipment provided in an embodiment of the present invention.

[0029] In one embodiment, the fire-fighting equipment startup and status detection circuit 100 provided by the embodiment of the present invention includes a first power input port (VCC1), a second power input port (VCC2), a control switch (K1), a first diode (D1), a second diode (D2), a sampling resistor (R1), a current detection amplifier (U1), a relay (K2), a detection port (ADCHECK) and a second resistor (R2); the anode of the first diode (D1) is connected to the first power input port (VCC1); the first end of the control switch (K1) is connected to the second power input port (VCC2); the anode of the second diode (D2) is connected to the second end of the control switch (K1); the cathode of the first diode (D1) is connected to the cathode of the second diode (D2); 2); the first end of the sampling resistor (R1) and the in-phase input end of the current detection amplifier (U1) are both connected to the negative electrode of the first diode (D1); the inverting input end of the current detection amplifier (U1) is connected to the second end of the sampling resistor (R1); the output end of the current detection amplifier (U1) is connected to the detection port (ADCHECK); the first end of the coil (K2A) of the relay (K2) and the first end of the normally open contact (K2B) are both connected to the second end of the sampling resistor (R1); the second end of the normally open contact (K2B) is connected to the first end of the second resistor (R2); the second end of the coil (K2A) and the second end of the second resistor (R2) are both grounded, and the fire equipment power supply circuit 200 is connected to another group of normally open contacts of the relay.

[0030] In one embodiment, the first power input port (VCC1) is connected to a 10V power supply to input a voltage of 10V; the second power input port (VCC2) is connected to a 24V power supply to input a voltage of 24V. The control switch (K1) is an electronic switch (such as a temperature control switch) or a mechanical switch (such as a push button switch).

[0031] Through the above-mentioned startup and status detection circuit 100, the user can detect various states of the startup circuit of the consumer device, such as startup, feedback, open circuit and short circuit, so that the user can know the operating status of the fire-fighting equipment in time.

[0032] For example, the above-mentioned starting and state detection circuit 100 can use a relay with a starting voltage of 18V or 24V. After the user builds the starting and state detection circuit 100 of the fire-fighting equipment in the above manner, the current value of the circuit in various states under the 10V and 24V power supply modes can be obtained through simulation experiments.

[0033] Specifically, the circuit states include normal, short circuit, open circuit, feedback, start-up feedback and start-up without feedback. The simulation laboratory can be carried out in the following ways:

[0034] When simulating a normal situation, a 10V voltage which is insufficient to start the relay (K2) is passed through the first power input port (VCC1), the switch (K1) is controlled to be disconnected, and the current value I1 across the sampling resistor (R1) is detected and stored in the controller 300;

[0035] When simulating a short circuit, a 10V voltage that is insufficient to start the relay (K2) is passed through the first power input port (VCC1), and the control switch (K1) is disconnected. At this time, the simulated detection circuit is short-circuited, and the current value I2 across the sampling resistor (R1) is detected and stored in the controller 300;

[0036] When simulating an open circuit, a 10V voltage that is insufficient to start the relay (K2) is passed through the first power input port (VCC1), and the control switch (K1) is disconnected. At this time, the simulated detection circuit is open, and the current value I3 across the sampling resistor (R1) is detected and stored in the controller 300;

[0037] When simulating feedback, a 10V voltage that is insufficient to start the relay is passed through the first power input port (VCC1), and the control switch (K1) is disconnected. At this time, the external fire-fighting equipment is manually started, and the current value I4 across the sampling resistor (R1) is detected and stored in the controller 300;

[0038] When simulating the startup feedback, a 10V voltage is input to the first power input port (VCC1), and a 24V voltage sufficient to start the relay (K2) is input to the second power input port (VCC2). After closing the control switch (K1), the relay (K2) starts normally. At this time, the external fire-fighting equipment is successfully started, and the current value I5 across the sampling resistor (R1) is detected and stored in the controller 300;

[0039] When the analog startup does not provide feedback, a 10V voltage is input to the first power input port (VCC1), and a 24V voltage sufficient to start the relay (K2) is input to the second power input port (VCC2). After the control switch (K1) is closed, the relay (K2) starts normally. The external fire-fighting equipment cannot be started due to other reasons. At this time, the current value I6 across the sampling resistor (R1) is detected and stored in the controller 300.

[0040] After simulating the current values ​​of the circuit in various states in the above manner, the various states of the circuit can be detected and analyzed according to the acquired current values ​​after the circuit is put into normal use.

[0041] In one embodiment, the startup and status detection circuit 100 further includes a fuse (F1); the cathode of the first diode (D1) and the cathode of the second diode (D2) are both connected to the first end of the fuse (F1); the second end of the fuse (F1) is connected to the first end of the sampling resistor (R1). By providing the fuse (F1), the circuit can be protected and the safety of use can be improved.

[0042] Please see Figure 2 , Figure 2 A schematic diagram of the topological structure of a fire-fighting equipment startup and status detection system provided in an embodiment of the present invention.

[0043] In one implementation, the embodiment of the present invention further provides a fire-fighting equipment startup and status detection system 10, which includes a controller 300, and a plurality of the above startup and status detection circuits 100 connected to the controller 300 through a detection port (ADCHECK). The current values ​​obtained by simulation experiments of each startup and status detection circuit 100 in each operating state can be stored in the controller 300. When the startup and status detection circuit 100 is officially put into use, the current value of each startup and status detection circuit 100 can be obtained through the AD pin of the controller 300, and then compared with the current value of the corresponding operating state obtained by the simulation experiment, and the current operating state of each startup and status detection circuit 100 can be analyzed.

[0044] Please see Figure 3 , Figure 3 A schematic flow chart of a method for starting and detecting the status of fire-fighting equipment provided in an embodiment of the present invention.

[0045] In one implementation, the present invention also provides a method for starting and detecting the status of fire fighting equipment, including:

[0046] S1. After the system is built, power on the simulated circuit to generate current values ​​corresponding to several states, including normal, short circuit, open circuit, feedback, start feedback, and start without feedback, and store the current values ​​corresponding to each state;

[0047] S2. After the system runs normally, the current at both ends of the sampling resistor is detected in real time, and the detected current value is compared with the current value stored in the controller. The actual status of the circuit and the external fire-fighting equipment is determined based on the comparison result;

[0048] S3. Analyze whether the relay needs to be replaced or calibrated based on the actual status, and if necessary, re-execute steps S1-S2.

[0049] Furthermore, the specific process of the above method when executing S1 is as follows:

[0050] When simulating a normal situation, a 10V voltage which is insufficient to start the relay (K2) is passed through the first power input port (VCC1), the switch (K1) is controlled to be disconnected, and the current value I1 across the sampling resistor (R1) is detected and stored in the controller 300;

[0051] When simulating a short circuit, a 10V voltage that is insufficient to start the relay (K2) is passed through the first power input port (VCC1), and the control switch (K1) is disconnected. At this time, the simulated detection circuit is short-circuited, and the current value I2 across the sampling resistor (R1) is detected and stored in the controller 300;

[0052] When simulating an open circuit, a 10V voltage that is insufficient to start the relay (K2) is passed through the first power input port (VCC1), and the control switch (K1) is disconnected. At this time, the simulated detection circuit is open, and the current value I3 across the sampling resistor (R1) is detected and stored in the controller 300;

[0053] When simulating feedback, a 10V voltage that is insufficient to start the relay is passed through the first power input port (VCC1), and the control switch (K1) is disconnected. At this time, the external fire-fighting equipment is manually started, and the current value I4 across the sampling resistor (R1) is detected and stored in the controller 300;

[0054] When simulating the startup feedback, a 10V voltage is input to the first power input port (VCC1), and a 24V voltage sufficient to start the relay (K2) is input to the second power input port (VCC2). After closing the control switch (K1), the relay (K2) starts normally. At this time, the external fire-fighting equipment is successfully started, and the current value I5 across the sampling resistor (R1) is detected and stored in the controller 300;

[0055] When the analog startup does not provide feedback, a 10V voltage is input to the first power input port (VCC1), and a 24V voltage sufficient to start the relay (K2) is input to the second power input port (VCC2). After the control switch (K1) is closed, the relay (K2) starts normally. The external fire-fighting equipment cannot be started due to other reasons. At this time, the current value I6 across the sampling resistor (R1) is detected and stored in the controller 300.

[0056] In the above implementation process, the current magnitude relationship in simulation or actual detection is I5>I6>I2>I4>I1>I3.

[0057] Through the above method, various operating states of the startup and status detection circuit can be detected under both 10V and 24V power supply modes; at the same time, through the above method, simulation is performed on the completed circuit before detection, and the set detection parameters are more precise and the detection results are more accurate.

[0058] In summary, an embodiment of the present invention provides a fire-fighting equipment startup and status detection circuit, system and method, including a first power input port, a second power input port, a control switch, a first diode, a second diode, a sampling resistor, a current detection amplifier, a relay, a detection port and a second resistor; the positive electrode of the first diode is connected to the first power input port; the first end of the control switch is connected to the second power input port; the positive electrode of the second diode is connected to the second end of the control switch; the negative electrode of the first diode is connected to the negative electrode of the second diode; the first end of the sampling resistor and the in-phase input end of the current detection amplifier are both connected to the negative electrode of the first diode; the inverting input end of the current detection amplifier is connected to the second end of the sampling resistor; the output end of the current detection amplifier is connected to the detection port; the first end of the coil of the relay and the first end of the normally open contact are both connected to the second end of the sampling resistor; the second end of the normally open contact is connected to the first end of the second resistor; the second end of the coil and the second end of the second resistor are both grounded, and the fire-fighting equipment power supply circuit is connected to another group of normally open contacts of the relay. Through the above method, the problem of unstable fire equipment status detection caused by different manufacturers and different environments is solved, and the interference caused by other signals on site can be avoided. At the same time, the circuit is simplified and the production and installation and debugging costs are reduced.

[0059] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A fire-fighting equipment startup and status detection circuit, characterized in that: The invention comprises a first power input port, a second power input port, a control switch, a first diode, a second diode, a sampling resistor, a current detection amplifier, a relay, a detection port and a second resistor; the positive electrode of the first diode is connected to the first power input port; the first end of the control switch is connected to the second power input port; the positive electrode of the second diode is connected to the second end of the control switch; the negative electrode of the first diode is connected to the negative electrode of the second diode; the first end of the sampling resistor and the in-phase input end of the current detection amplifier are both connected to the negative electrode of the first diode; the inverting input end of the current detection amplifier is connected to the second end of the sampling resistor; the output end of the current detection amplifier is connected to the detection port; the first end of the coil of the relay and the first end of one group of normally open contacts are both connected to the second end of the sampling resistor; the second end of the group of normally open contacts is connected to the first end of the second resistor; the second end of the coil and the second end of the second resistor are both grounded; at the same time, the fire fighting equipment is connected to another group of normally open contacts of the relay; the starting voltage of the relay is between the input voltage of the first power input port and the input voltage of the second power input port.

2. The startup and status detection circuit according to claim 1, characterized in that: The input voltage of the first power input port is 10V; the input voltage of the second power input port is 24V.

3. The startup and status detection circuit according to claim 1, characterized in that: The control switch is an electronic switch or a mechanical switch.

4. The startup and status detection circuit according to claim 1, characterized in that: The startup and status detection circuit also includes a fuse; the cathode of the first diode and the cathode of the second diode are both connected to the first end of the fuse; the second end of the fuse is connected to the first end of the sampling resistor.

5. A fire-fighting equipment startup and status detection system, characterized in that: It comprises a controller, and a plurality of startup and status detection circuits according to any one of claims 1 to 4 connected to the controller via a detection port.

6. A method for starting and detecting the state of fire fighting equipment, applied to the starting and detecting the state of fire fighting equipment according to claim 5, characterized in that: include: S1. After the system is built, power on the simulated circuit to generate current values ​​corresponding to several states, including normal, short circuit, open circuit, feedback, start feedback, and start without feedback, and store the current values ​​corresponding to each state; S2. After the system runs normally, the current at both ends of the sampling resistor is detected in real time, and the detected current value is compared with the current value stored in the controller. The actual status of the circuit and the external fire-fighting equipment is determined based on the comparison result; S3. Analyze whether the relay needs to be replaced or calibrated based on the actual status, and if necessary, re-execute steps S1-S2.

7. The method according to claim 6, characterized in that S1 includes: When simulating a normal situation, a 10V voltage that is not enough to start the relay is passed through the first power input port, the control switch is disconnected, the current value I1 across the sampling resistor is detected and the current value is stored in the controller; When simulating a short circuit, a 10V voltage that is not enough to start the relay is passed through the first power input port, and the control switch is disconnected. At this time, the simulated detection circuit is short-circuited, and the current value I2 at both ends of the sampling resistor is detected and stored in the controller; When simulating an open circuit, a 10V voltage that is not enough to start the relay is passed through the first power input port, and the control switch is disconnected. At this time, the simulated detection circuit is open, and the current value I3 at both ends of the sampling resistor is detected and stored in the controller; When simulating feedback, a 10V voltage that is not enough to start the relay is passed through the first power input port, and the control switch is disconnected. At this time, the external fire-fighting equipment is manually started, and the current value I4 at both ends of the sampling resistor is detected and stored in the controller; When simulating the startup feedback, a 10V voltage is input to the first power input port, and a 24V voltage sufficient to start the relay is input to the second power input port. After closing the control switch, the relay starts normally. At this time, the external fire-fighting equipment starts successfully, and the current value I5 at both ends of the sampling resistor is detected and stored in the controller; When the analog start-up has no feedback, a 10V voltage is input to the first power input port, and a 24V voltage sufficient to start the relay is input to the second power input port. After the control switch is closed, the relay starts normally. If the external fire-fighting equipment cannot be started due to other reasons, the current value I6 across the sampling resistor is detected at this time and stored in the controller.

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