CN204406633U - A kind of detection alarm device and detectable signal transfer circuit - Google Patents
A kind of detection alarm device and detectable signal transfer circuit Download PDFInfo
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- CN204406633U CN204406633U CN201520040206.7U CN201520040206U CN204406633U CN 204406633 U CN204406633 U CN 204406633U CN 201520040206 U CN201520040206 U CN 201520040206U CN 204406633 U CN204406633 U CN 204406633U
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Abstract
The utility model discloses a kind of detection alarm device and detectable signal transfer circuit, described device comprises: detector circuit, prime alarm host machine, state detection unit, State-output unit and rear class alarm host machine; Wherein, the signal output part of described detector circuit is electrically connected with the defence area input end of prime alarm host machine; The input end of state detection unit is electrically connected on the signal output part of described detector, and the output terminal of described state detection unit is electrically connected on the control end of described State-output unit; The output terminal of described State-output unit is electrically connected on the defence area input end of described rear class alarm host machine.Detector is connected with rear class alarm host machine with prime alarm host machine with State-output unit by the utility model utilization state detecting unit, comparator input terminal impedance simultaneously in utilization state detecting unit is infinitely great, and then do not affect the feature of prime alarm host machine to the judgement of states of defense zones, achieve the accurate warning of single detector to multiple alarm host machine.
Description
Technical Field
The utility model relates to a survey alarm technology field, in particular to single detector inserts a plurality of alarm host's detection alarm device and detection signal transfer circuit.
Background
At present, in the alarm field, the electrical connection mode between a detector and an alarm host is that 1 detector is electrically connected with 1 alarm host as shown in fig. 1. The detector is a device for detecting the defense area state, the output signal of the signal output interface of the detector is a switching value signal, and the default output state of the detector is a normally open state or a normally closed state. If the default signal output state of the detector is the normally open state, the detector cannot trigger the alarm of the alarm host when the detector is in the normally open state, otherwise, the detector detects that the normally open state is suddenly changed into the closed state due to the abnormal signal, and the alarm of the alarm host is triggered. If the default signal output state of the detector is a normally closed state, the detector cannot trigger the alarm of the alarm host when the detector is in the normally closed state, otherwise, the detector triggers the alarm of the alarm host when the detector detects that the normally closed state is suddenly changed into an open state due to abnormal signals.
In the electric connection system, the signal output end of the detector is electrically connected with the defense area input end of the alarm host. The defense area is a basic characteristic of the alarm host, is an electric connection port of the detector and the alarm host, and is a minimum space unit capable of distinguishing alarm events. In the alarm host, the alarm controller judges whether to give an alarm or not by detecting a switching value signal at the input end of a defense area.
And a line tail resistor R is electrically connected between the detector and the alarm host, wherein the first end of the line tail resistor R is electrically connected with the signal output end of the detector and the defense area input end of the alarm host, and the second end of the line tail resistor R and the grounding end of the detector are grounded together. The tail resistor R is a resistor which is electrically connected with the signal output end of the detector in order to prevent artificial damage. The arrangement of the line tail resistor R can realize the short circuit and open circuit alarm response of the alarm host to the detector or the connecting line between the detector and the defense area input end.
Fig. 1 shows a circuit structure of a detector commonly used at present and electrically connected to an alarm host. The detector is a normally open detector, and for the alarm host, the line tail resistor R and the detector are in parallel connection. If the detector is a normally closed detector, the electric connection relation of the line tail resistor R is in series connection between the signal output end of the detector and the defense area input end of the alarm host. For the same alarm host, a plurality of defense areas can be arranged according to the design, and then a plurality of defense area input ends are arranged, so that a plurality of various detectors can be electrically connected at the same time. However, for the detector, one detector can only be electrically connected with one alarm host, and cannot be electrically connected with a plurality of alarm hosts at the same time. The reason is limited by the implementation principle of the current defense area state judgment, for example, as shown in fig. 1, the normal state and the abnormal state are distinguished between the detector and the alarm host through the difference between the line tail resistor R and the voltage division value of the equivalent resistor at the defense area input end of the alarm host, so that if the detector is directly and electrically connected to two or more alarm hosts, the abnormal voltage division value of the defense area is caused by the parallel connection relationship of the equivalent resistors at the defense area input end, and the alarm host works abnormally and cannot give a normal alarm. For the circuit structure that the detector is a normally closed detector and the line tail resistor R is connected in series between the signal output end of the detector and the defense area input end of the alarm host, normal alarm when a single detector is simply and electrically connected to two or more alarm hosts cannot be realized due to the same reason.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a survey alarm device and detection signal transfer circuit to realize that the electricity of a detector and a plurality of alarm host computer is connected and the accuracy is reported an emergency and asked for help or increased vigilance.
The technical scheme of the utility model is realized like this:
a detection alarm device comprising:
the device comprises a detector circuit, a preceding stage alarm host and a first alarm circuit; wherein,
the defense area input end of the preceding stage alarm host is electrically connected with the signal output end of the detector circuit so as to alarm according to the state change of the signal output end of the detector circuit;
the first alarm circuit comprises a state detection unit, a state output unit and a rear-stage alarm host; wherein,
the output end of the state detection unit is electrically connected with the control end of the state output unit so as to output a control signal to the state output unit according to the signal change detected by the input end of the state detection unit;
the state output unit is used for generating a state signal at the output end of the state output unit according to the control signal of the control end of the state output unit;
the defense area input end of the rear-stage alarm host is electrically connected with the output end of the state output unit so as to alarm according to the state signal change of the output end of the state output unit;
the input end of the state detection unit is electrically connected with the signal output end of the detector circuit so as to output a control signal to the state output unit according to the state change of the signal output end of the detector circuit.
Furthermore, the detection alarm device also comprises at least 1-stage cascade alarm circuit; wherein,
each stage of alarm circuit in the cascade alarm circuit comprises a state detection unit, a state output unit and a rear stage alarm host; wherein,
the output end of the state detection unit in each stage of alarm circuit is electrically connected with the control end of the state output unit in the alarm circuit of the stage so as to output a control signal to the state output unit in the alarm circuit of the stage according to the signal change detected by the input end of the state detection unit;
the state output unit in each stage of alarm circuit is used for generating a state signal at the output end of the alarm circuit according to the control signal of the control end of the alarm circuit;
the defense area input end of the rear-stage alarm host in each stage of alarm circuit is electrically connected with the output end of the state output unit in the stage of alarm circuit so as to alarm according to the state signal change of the output end of the state output unit in the stage of alarm circuit;
the input end of the state detection unit in each stage of alarm circuit is electrically connected with the output end of the state output unit in the previous stage of alarm circuit, so as to output a control signal to the state output unit of the stage according to the state signal change of the output end of the state output unit in the previous stage of alarm circuit;
the input end of the state detection unit in the first-stage alarm circuit connected to the first alarm circuit is electrically connected to the output end of the state output unit in the first alarm circuit, so as to output a control signal to the state output unit of the first-stage according to the state signal change of the output end of the state output unit in the first alarm circuit.
Further, the state detection unit is a window comparison circuit.
Further, the detector circuit includes a detector and a first tail resistor; wherein,
the detector is a normally open detector, and the output end of the detector is used as the signal output end of a detector circuit and is electrically connected to the defense area input end of the preceding stage alarm host;
the first end of the first tail resistor is electrically connected to the output end of the detector, and the second end of the first tail resistor is electrically connected to the grounding end of the detector and grounded;
the state output unit comprises a relay, an NPN type triode, a third resistor, a freewheeling diode and a second tail resistor; wherein,
the first coil end of the relay is electrically connected to a third voltage;
the second coil end of the relay is electrically connected with the collector electrode of the triode;
the negative pole of the freewheeling diode is electrically connected to the first coil end of the relay, and the positive pole of the freewheeling diode is electrically connected to the second coil end of the relay;
the base electrode of the triode is used as the control end of the state output unit and is electrically connected with the output end of the state detection unit;
the emitting electrode of the triode is grounded;
two ends of the third resistor are respectively and electrically connected with the base electrode and the emitting electrode of the triode;
the public end of the relay is used as the output end of the state output unit and is electrically connected with the defense area input end of the rear-stage alarm host in the first alarm circuit;
the normally open end of the relay is grounded;
the normally closed end of the relay is suspended;
the first end of the second tail resistor is electrically connected to the common end of the relay, and the second end of the second tail resistor is grounded.
Further, the detector circuit includes a detector and a first tail resistor; wherein,
the detector is a normally open detector, and the output end of the detector is used as the signal output end of a detector circuit and is electrically connected to the defense area input end of the preceding stage alarm host;
the first end of the first tail resistor is electrically connected to the output end of the detector, and the second end of the first tail resistor is electrically connected to the grounding end of the detector and grounded;
the state output unit comprises a relay, an NPN type triode, a third resistor, a freewheeling diode and a second tail resistor; wherein,
the first coil end of the relay is electrically connected to a third voltage;
the second coil end of the relay is electrically connected with the collector electrode of the triode;
the negative pole of the freewheeling diode is electrically connected to the first coil end of the relay, and the positive pole of the freewheeling diode is electrically connected to the second coil end of the relay;
the base electrode of the triode is used as the control end of the state output unit and is electrically connected with the output end of the state detection unit;
the emitting electrode of the triode is grounded;
two ends of the third resistor are respectively and electrically connected with the base electrode and the emitting electrode of the triode;
the common end of the relay is electrically connected to the first end of the second tail resistor;
the normally open end of the relay is suspended;
the normally closed end of the relay is grounded;
and the second end of the second tail resistor is used as the output end of the state output unit and is electrically connected to the defense area input end of the rear-stage alarm host in the first alarm circuit.
Further, the detector circuit includes a detector and a first tail resistor; wherein,
the detector is a normally closed detector, the output end of the detector is electrically connected to the first end of the first tail resistor, and the grounding end of the detector is grounded;
the second end of the first tail resistor is used as a signal output end of the detector circuit and is electrically connected to the defense area input end of the preceding stage alarm host;
the state output unit comprises a relay, an NPN type triode, a third resistor, a freewheeling diode and a second tail resistor; wherein,
the first coil end of the relay is electrically connected to a third voltage;
the second coil end of the relay is electrically connected with the collector electrode of the triode;
the negative pole of the freewheeling diode is electrically connected to the first coil end of the relay, and the positive pole of the freewheeling diode is electrically connected to the second coil end of the relay;
the base electrode of the triode is used as the control end of the state output unit and is electrically connected with the output end of the state detection unit;
the emitting electrode of the triode is grounded;
two ends of the third resistor are respectively and electrically connected with the base electrode and the emitting electrode of the triode;
the common end of the relay is electrically connected to the first end of the second tail resistor;
the second end of the second tail resistor is used as the output end of the state output unit and is electrically connected to the defense area input end of the rear-stage alarm host in the first alarm circuit;
the normally closed end of the relay is grounded;
the normally open end of the relay is suspended.
Further, the detector circuit includes a detector and a first tail resistor; wherein,
the detector is a normally closed detector, the output end of the detector is electrically connected to the first end of the first tail resistor, and the grounding end of the detector is grounded;
the second end of the first tail resistor is used as a signal output end of the detector circuit and is electrically connected to the defense area input end of the preceding stage alarm host;
the state output unit comprises a relay, an NPN type triode, a third resistor, a freewheeling diode and a second tail resistor; wherein,
the first coil end of the relay is electrically connected to a third voltage;
the second coil end of the relay is electrically connected with the collector electrode of the triode;
the negative pole of the freewheeling diode is electrically connected to the first coil end of the relay, and the positive pole of the freewheeling diode is electrically connected to the second coil end of the relay;
the base electrode of the triode is used as the control end of the state output unit and is electrically connected with the output end of the state detection unit;
the emitting electrode of the triode is grounded;
two ends of the third resistor are respectively and electrically connected with the base electrode and the emitting electrode of the triode;
the public end of the relay is used as the output end of the state output unit and is electrically connected with the defense area input end of the rear-stage alarm host in the first alarm circuit;
the normally closed end of the relay is suspended;
the normally open end of the relay is grounded;
the first end of the second tail resistor is electrically connected to the common end of the relay, and the second end of the second tail resistor is grounded.
Furthermore, a filter circuit is electrically connected between the signal output end of the detector circuit and the input end of the state detection unit.
A detection signal transmission circuit includes a state detection unit and a state output unit; wherein,
the input end of the state detection unit is electrically connected with the signal output end of the detector circuit or the output end of the state output unit in the previous stage, and the output end of the state detection unit is electrically connected with the control end of the state output unit so as to output a control signal to the state output unit according to the state change of the signal output end of the detector circuit or the state signal change of the output end of the state output unit in the previous stage alarm circuit;
the output end of the state output unit is electrically connected with the defense area input end of the rear-stage alarm host and used for generating a state signal at the output end of the state output unit according to the control signal of the control end of the state output unit.
According to the above technical scheme, the utility model discloses a detection alarm device and detection signal transfer circuit utilize state detecting element and state output unit to link to each other detector and preceding stage alarm host and back level alarm host, utilize comparator input impedance infinity among the state detecting element simultaneously, and then do not influence preceding stage alarm host to the characteristics of the judgement of defence area state, realized the accurate warning of single detector to a plurality of alarm hosts. In the in-process of evolving to the network alarm host computer by telephone alarm host computer, need ensure the condition of security when upgrading the generation to the product, the utility model discloses the demand of two alarm host computers of same detector electricity is connected has been satisfied to the security demand that needs the redundant work of alarm host computer has been satisfied.
Drawings
FIG. 1 is a schematic diagram of the electrical connection between a detector and an alarm host in the prior art;
fig. 2 is a schematic structural view of a first embodiment of the detection alarm device of the present invention;
fig. 3 is a schematic structural view of a second embodiment of the detection alarm device of the present invention;
fig. 4 is a schematic diagram of a first circuit structure of a first embodiment of the detection alarm device of the present invention;
fig. 5 is a schematic diagram of a second circuit structure of the first embodiment of the detection alarm device of the present invention;
fig. 6 is a schematic diagram of a third circuit structure of the first embodiment of the detection alarm device of the present invention;
fig. 7 is a schematic diagram of a fourth circuit structure of the first embodiment of the detection alarm device of the present invention;
FIG. 8 is a schematic structural diagram of an embodiment of the detecting and alarming device with a filter circuit according to the present invention;
fig. 9 is a circuit diagram of an embodiment of a state detection unit according to the present invention;
fig. 10 is a schematic structural diagram of the detection signal transmission circuit of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and examples.
Fig. 2 is a schematic structural diagram of a first embodiment of the detection alarm device provided by the present invention, which includes a detector circuit 10, a preceding-stage alarm host 20, and a first alarm circuit 30; wherein, the defense area input end of the front stage alarm host 20 is electrically connected with the signal output end of the detector circuit 10, so as to alarm according to the state change of the signal output end of the detector circuit 10; the first alarm circuit 30 comprises a state detection unit 301, a state output unit 302 and a rear-stage alarm host 303; the output end of the state detection unit 301 is electrically connected to the control end of the state output unit 302, so as to output a control signal to the state output unit 302 according to the signal change detected by the input end of the state detection unit 301; the state output unit 302 is configured to generate a state signal at an output end thereof according to a control signal at a control end thereof; the defense area input end of the rear-stage alarm host 303 is electrically connected with the output end of the state output unit 302 so as to alarm according to the state signal change of the output end of the state output unit 302; the input terminal of the state detection unit 301 is electrically connected to the signal output terminal of the detector circuit 10, so as to output a control signal to the state output unit 302 according to the state change of the signal output terminal of the detector circuit 10.
On the basis of the detection alarm device structure shown in fig. 2, the utility model also provides a multistage cascaded detection alarm device, as shown in fig. 3, the detection alarm device further comprises at least 1-stage cascaded alarm circuit 40; each stage of alarm circuit 41 in the cascade alarm circuit 40 includes a state detection unit 411, a state output unit 412 and a rear stage alarm host 413; wherein, the output terminal of the state detection unit 411 in each stage of the alarm circuit 41 is electrically connected to the control terminal of the state output unit 412 in the present stage of the alarm circuit 41, so as to output a control signal to the state output unit 412 in the present stage of the alarm circuit 41 according to the signal change detected by the input terminal of the state detection unit 411; a status output unit 412 in each stage of the alarm circuit 41, configured to generate a status signal at an output terminal thereof according to a control signal at a control terminal thereof; the defense area input end of the rear-stage alarm host 413 in each stage of the alarm circuit 41 is electrically connected with the output end of the state output unit 412 in the current-stage alarm circuit 41, so as to alarm according to the state signal change at the output end of the state output unit 412 in the current-stage alarm circuit 41; the input terminal of the state detection unit 411 in each stage of the alarm circuit 41 is electrically connected to the output terminal of the state output unit 412 in the previous stage of the alarm circuit 41, so as to output a control signal to the state output unit 412 of the present stage according to the state signal change of the output terminal of the state output unit 412 in the previous stage of the alarm circuit 41; the input terminal of the status detection unit 411 in the first-stage alarm circuit 41 connected to the first alarm circuit 30 is electrically connected to the output terminal of the status output unit 302 in the first alarm circuit 30, so as to output a control signal to the status output unit 412 in the present stage according to the status signal change at the output terminal of the status output unit 302 in the first alarm circuit 30.
The utility model discloses in, state detecting element 301 and state detecting element 411 are window comparison circuit, and it is the infinite that utilizes state detecting element input impedance, and then does not influence the characteristics of preceding stage alarm host to the judgement of defence area state, have realized that single detector is connected with a plurality of alarm host's effective electricity.
As shown in fig. 4, it is a schematic diagram of a first circuit structure of the first embodiment of the detection alarm device of the present invention. In this circuit, the state detection unit 301 includes a first comparator a1, a second comparator a2, a first diode D1, and a second diode D2. The non-inverting input terminal of the first comparator a1 and the inverting input terminal of the second comparator a2 are connected to each other and electrically connected to the defense area input terminal of the preceding alarm master 20. The inverting input terminal of the first comparator A1 is electrically connected with a first voltage U1. The non-inverting input terminal of the second comparator A2 is electrically connected to a second voltage U2. The output end of the first comparator A1 is electrically connected with the positive end of the first diode D1. The output end of the second comparator A2 is electrically connected with the positive end of the second diode D2. The cathode of the first diode D1 and the cathode of the second diode D1 are connected to each other and electrically connected to the control terminal of the state output unit 302. Wherein the voltage of the first voltage U1 is greater than the voltage of the second voltage U2.
In the circuit shown in fig. 4, the detector circuit 10 includes a detector 11 and a first tail resistor R1. The detector 11 is a normally open detector, and an output end of the detector 11 is electrically connected to a defense area input end of the preceding stage alarm host 20 as a signal output end of the detector circuit 10; a first end of the first tail resistor R1 is electrically connected to the output terminal of the probe 11, and a second end of the first tail resistor R1 is electrically connected to the ground terminal of the probe 11 and is grounded.
In the circuit shown in fig. 4, the state output unit 302 includes a relay K, NPN type transistor T, a third resistor R3, a freewheeling diode D3 and a second tail resistor R2. The first coil end of the relay K is electrically connected to a third voltage U3; the second coil end of the relay K is electrically connected to the collector electrode of the triode T; the negative electrode of the freewheeling diode D3 is electrically connected to the first coil end of the relay K, and the positive electrode of the freewheeling diode D3 is electrically connected to the second coil end of the relay K; the base electrode of the triode T is electrically connected to the output end of the state detection unit 301 as the control end of the state output unit 302; the emitting electrode of the triode T is grounded; two ends of the third resistor R3 are respectively and electrically connected with the base electrode and the emitting electrode of the triode T; the common end of the relay K is used as the output end of the state output unit 302 and is electrically connected to the defense area input end of the rear-stage alarm host 303 in the first alarm circuit 30; the normally open end of the relay K is grounded; the normally closed end of the relay K is suspended; the first end of the second tail resistor R2 is electrically connected to the common end of the relay K, and the second end of the second tail resistor R2 is grounded.
In the circuit shown in fig. 4, the first voltage U1 is set as the off threshold voltage of preceding alarm master 20, and the second voltage U2 is set as the short threshold voltage of preceding alarm master 20.
The relay has a default state similar to that of the detector, so that the normally open or normally closed end of the relay K can be selected to be connected to the rear-stage alarm main unit 303 in the first alarm circuit 30. The action of the relay K is controlled by the output of the state detection unit 301, so that the relay K is switched from one state to another state, which is similar to the operation of a detector for alarming a host.
In this embodiment, the detector 11 is a normally open detector, the normally open end and the common end of the relay K are connected to the rear-stage alarm host 303 in the first alarm circuit 30, that is, the common end of the relay K is electrically connected to the defense area input end of the rear-stage alarm host 303 in the first alarm circuit 30, and the normally open end of the relay K is connected to the ground end (i.e., grounded) of the rear-stage alarm host 303 in the first alarm circuit 30. In a default state, the rear-stage alarm host 303 in the first alarm circuit 30 receives a normally open state, and only when the state detection unit 301 detects that the detector 11 alarms, and then the state detection unit 301 controls the relay K to move to change into another state, that is, the switch is closed, the rear-stage alarm host 303 in the first alarm circuit 30 alarms.
Therefore, when the voltage at the defence area input terminal of the preceding stage alarm main unit 20 is between the first voltage U1 and the second voltage U2, the preceding stage alarm main unit 20 regards the detector 11 as being in the normal state and does not perform an alarm. At this time, the first comparator a1 and the second comparator a2 both output negative voltages, and then the first diode D1 and the second diode D2 are both in a cut-off state, and further a voltage signal cannot be output to the base of the triode T in the state output unit 302, so that the triode T is cut off, and further the common end and the normally open end of the relay K are disconnected, and further the input end of the alarm main unit 303 has a normal voltage division value due to the existence of the second tail resistor R2, and does not give an alarm.
When the voltage of the defense area input end of the front-stage alarm host 20 is greater than the voltage of the first voltage U1, the front-stage alarm host 20 alarms because the voltage of the defense area input end of the front-stage alarm host 20 is greater than the voltage of the first voltage U1, and simultaneously because the voltage of the defense area input end of the front-stage alarm host 20 is greater than the voltage of the first voltage U1, the output end of the first comparator a1 in the state detection unit 301 is positive voltage, the first diode D1 is turned on, the second diode D2 is turned off, and a positive voltage signal is output to the base of the triode T in the state output unit 302, so that the triode T is turned on, and further the common end of the relay K is electrically connected with the common end, and the defense area input end of the rear-stage alarm host 303.
When the voltage at the defense area input end of the front-stage alarm host 20 is less than the voltage of the second voltage U2, the front-stage alarm host 20 alarms because the voltage at the defense area input end of the front-stage alarm host 20 is less than the voltage of the second voltage U2, and simultaneously because the voltage at the defense area input end of the front-stage alarm host 20 is less than the voltage of the second voltage U2, the output end of the second comparator a2 in the state detection unit 301 is positive voltage, the second diode D2 is turned on, the first diode D1 is turned off, and a positive voltage signal is output to the base of the triode T in the state output unit 302, so that the triode T is turned on, and further the common input end of the relay K is electrically connected with the common input end, and the defense area input end of the rear-stage alarm.
Fig. 5 is a schematic diagram of a second circuit structure of the first embodiment of the detection alarm device according to the present invention. Unlike the circuit structure shown in fig. 4, the normally closed end of the relay K in the circuit shown in fig. 5 is grounded, the common end of the relay K is electrically connected to the first end of the second tail resistor R2, the normally open end of the relay K is floating, and the second end of the second tail resistor R2, which is the output end of the state output unit 302, is electrically connected to the defense area input end of the rear-stage alarm host 303. The operation principle of the circuit shown in fig. 5 is the same as that of the circuit shown in fig. 4, and the description is omitted.
In the circuit shown in fig. 5, the first voltage U1 is set as the off threshold voltage of preceding alarm master 20, and the second voltage V3 is set as the short threshold voltage of preceding alarm master 20.
In the circuit shown in fig. 5, the detector 11 is a normally open detector, the normally closed end and the common end of the relay K are connected to the rear-stage alarm host 303 through a second tail resistor R2, the normally closed end and the common end are grounded, and the normally open end is suspended. When the relay K output is selected to be the normally closed output, the voltage division between the second tail resistor R2 and the pull-up resistor of the rear-stage alarm host 303 is within the normal voltage range of the rear-stage alarm host 303 due to the second tail resistor R2 connected in series between the defense area input end of the rear-stage alarm host 303 and the relay K, so that the rear-stage alarm host 303 does not give an alarm.
When the voltage of the defense area input end of the front-stage alarm host 20 is greater than the voltage of the first voltage U1, the front-stage alarm host 20 alarms because the voltage of the defense area input end of the front-stage alarm host 20 is greater than the voltage of the first voltage U1, and simultaneously because the voltage of the defense area input end of the front-stage alarm host 20 is greater than the voltage of the first voltage U1, the output end of the first comparator a1 in the state detection unit 301 is positive, the first diode D1 is turned on, the second diode D2 is turned off, and a positive voltage signal is output to the base electrode of the triode T in the state output unit 302, so that the triode T is turned on, and further the common end and the normally closed end of the relay K are disconnected.
When the voltage of the defense area input terminal of the front-stage alarm host 20 is less than the voltage of the second voltage U2, the front-stage alarm host 20 alarms because the voltage of the defense area input terminal of the front-stage alarm host 20 is less than the voltage of the second voltage U2, and simultaneously because the voltage of the defense area input terminal of the front-stage alarm host 20 is less than the voltage of the second voltage U2, the output terminal of the second comparator a2 in the state detection unit 301 is positive, the second diode D2 is turned on, the first diode D1 is turned off, and a positive voltage signal is output to the base terminal of the triode T in the state output unit 302, so that the triode T is turned on, and further the common input terminal and the normally closed terminal of the relay K are disconnected, at this time, the defense area input terminal voltage of the rear-stage alarm host 303 becomes a defense area pull-up voltage value, and further exceeds the normal voltage range, and.
As shown in fig. 6, it is a schematic diagram of a third circuit structure of the first embodiment of the detection alarm device of the present invention. The state detection unit 301 in this circuit is the same as the second embodiment and the second embodiment, and is not described again.
In the circuit of fig. 6, the detector circuit 10 includes a detector 11 and a first tail resistor R1; the detector 11 is a normally closed detector, an output end of the detector 11 is electrically connected to a first end of the first tail resistor R1, and a ground end of the detector is grounded; the second end of the first tail resistor R1 is used as the signal output end of the detector circuit 10 and is electrically connected to the defense area input end of the preceding stage alarm main unit 20.
In the circuit shown in fig. 6, the state output unit 302 includes a relay K, NPN type transistor T, a third resistor R3, a freewheeling diode D3 and a second tail resistor R2; the first coil end of the relay K is electrically connected to a third voltage U3; the second coil end of the relay K is electrically connected to the collector electrode of the triode T; the negative electrode of the freewheeling diode D3 is electrically connected to the first coil end of the relay K, and the positive electrode of the freewheeling diode D3 is electrically connected to the second coil end of the relay K; the base electrode of the triode T is electrically connected to the output end of the state detection unit 301 as the control end of the state output unit 302; the emitting electrode of the triode T is grounded; two ends of the third resistor R3 are respectively and electrically connected with the base electrode and the emitting electrode of the triode T; the common end of the relay K is electrically connected to the first end of the second tail resistor R2; a second end of the second tail resistor R2 is electrically connected to a defense area input end of the rear-stage alarm host 303 as an output end of the state output unit 302; the normally closed end of the relay K is grounded; the normally open end of the relay K is suspended.
In the circuit shown in fig. 6, the first voltage U1 is set as the off threshold voltage of preceding alarm master 20, and the second voltage V3 is set as the short threshold voltage of preceding alarm master 20.
In the circuit, the detector 11 is a normally closed detector, the normally closed end and the common end of the relay K are connected to the rear-stage alarm host 303 through a second tail resistor R2, the normally closed end and the common end are grounded, and the normally open end is suspended. When the relay K output is selected to be the normally closed output, the voltage division between the second tail resistor R2 and the pull-up resistor of the rear-stage alarm host 303 is within the normal voltage range of the rear-stage alarm host 303 due to the second tail resistor R2 connected in series between the defense area input end of the rear-stage alarm host 303 and the relay K, so that the rear-stage alarm host 303 does not give an alarm.
When the voltage of the defense area input end of the front-stage alarm host 20 is greater than the voltage of the first voltage U1, the front-stage alarm host 20 alarms because the voltage of the defense area input end of the front-stage alarm host 20 is greater than the voltage of the first voltage U1, and simultaneously because the voltage of the defense area input end of the front-stage alarm host 20 is greater than the voltage of the first voltage U1, the output end of the first comparator a1 in the state detection unit 301 is positive, the first diode D1 is turned on, the second diode D2 is turned off, and a positive voltage signal is output to the base electrode of the triode T in the state output unit 302, so that the triode T is turned on, and further the common end and the normally closed end of the relay K are disconnected.
When the voltage of the defense area input terminal of the front-stage alarm host 20 is less than the voltage of the second voltage U2, the front-stage alarm host 20 alarms because the voltage of the defense area input terminal of the front-stage alarm host 20 is less than the voltage of the second voltage U2, and simultaneously because the voltage of the defense area input terminal of the front-stage alarm host 20 is less than the voltage of the second voltage U2, the output terminal of the second comparator a2 in the state detection unit 301 is positive, the second diode D2 is turned on, the first diode D1 is turned off, and a positive voltage signal is output to the base terminal of the triode T in the state output unit 302, so that the triode T is turned on, and further the common input terminal and the normally closed terminal of the relay K are disconnected, at this time, the defense area input terminal voltage of the rear-stage alarm host 303 becomes a defense area pull-up voltage value, and further exceeds the normal voltage range, and.
Fig. 7 is a schematic diagram of a fourth circuit structure of the first embodiment of the detection alarm device according to the present invention. Unlike the circuit shown in fig. 6, the common terminal of the relay K in the circuit shown in fig. 7 is electrically connected to the defense area input terminal of the rear-stage alarm host 303 as the output terminal of the state output unit 302, and the normally open terminal of the relay K is grounded; the normally closed end of the relay K is suspended; the first end of the second tail resistor R2 is electrically connected to the common end of the relay K, and the second end of the second tail resistor R2 is grounded.
In the circuit shown in fig. 7, the detector 11 is a normally closed detector, and the normally open end and the common end of the relay K are connected to the rear-stage alarm host 303, that is, the common end of the relay K is electrically connected to the defense area input end of the rear-stage alarm host 303, and the normally open end of the relay K is connected to the ground end (i.e., grounded) of the rear-stage alarm host 303. In a default state, the rear-stage alarm host 303 receives a normally open state, and only when the state detection unit 301 detects that the detector 11 alarms, the state detection unit 301 controls the relay K to move to change the relay K into another state, namely, the switch is closed, at this time, the rear-stage alarm host 303 alarms.
Therefore, when the voltage at the defence area input terminal of the preceding stage alarm main unit 20 is between the first voltage U1 and the second voltage U2, the preceding stage alarm main unit 20 regards the detector 11 as being in the normal state and does not perform an alarm. At this time, the first comparator a1 and the second comparator a2 both output negative voltages, and then the first diode D1 and the second diode D2 are both in a cut-off state, and further a voltage signal cannot be output to the base of the triode T in the state output unit 302, so that the triode T is cut off, and further the common end and the normally open end of the relay K are disconnected, and further the input end of the rear-stage alarm host 303 is normal in voltage division value due to the existence of the second tail resistor R2 and does not give an alarm.
When the voltage of the defense area input end of the front-stage alarm host 20 is greater than the voltage of the first voltage U1, the front-stage alarm host 20 alarms because the voltage of the defense area input end of the front-stage alarm host 20 is greater than the voltage of the first voltage U1, and simultaneously because the voltage of the defense area input end of the front-stage alarm host 20 is greater than the voltage of the first voltage U1, the output end of the first comparator a1 in the state detection unit 301 is positive voltage, the first diode D1 is turned on, the second diode D2 is turned off, and a positive voltage signal is output to the base of the triode T in the state output unit 302, so that the triode T is turned on, and further the common end of the relay K is electrically connected with the common end, and the defense area input end of the rear-stage alarm host 303.
When the voltage at the defense area input end of the front-stage alarm host 20 is less than the voltage of the second voltage U2, the front-stage alarm host 20 alarms because the voltage at the defense area input end of the front-stage alarm host 20 is less than the voltage of the second voltage U2, and simultaneously because the voltage at the defense area input end of the front-stage alarm host 20 is less than the voltage of the second voltage U2, the output end of the second comparator a2 in the state detection unit 301 is positive voltage, the second diode D2 is turned on, the first diode D1 is turned off, and a positive voltage signal is output to the base of the triode T in the state output unit 302, so that the triode T is turned on, and further the common input end of the relay K is electrically connected with the common input end, and the defense area input end of the rear-stage alarm.
In order to prevent the interference of noise in the circuit, the filter circuit 6 may be electrically connected between the signal output terminal of the detector circuit 10 and the input terminal of the state detection unit 301, as shown in fig. 8.
The utility model provides an in state detection unit 301, first comparator A1 and second comparator A2 still all have power input end and earthing terminal. The power input terminal of the first comparator a1 and the power input terminal of the second comparator a2 are electrically connected to the third voltage U3, and the ground terminal of the first comparator a1 and the ground terminal of the second comparator a2 are both grounded. And both the first voltage U1 and the second voltage U2 can be obtained from the third voltage U3 by using voltage dividing resistors. For example, the circuit diagram of the embodiment of the window comparator 3 shown in fig. 9. The power input terminal of the first comparator a1 is electrically connected to the third voltage U3, and the ground terminal of the first comparator a1 is grounded. A first end of the fourth resistor R4 is electrically connected to the third voltage U3, a second end of the fourth resistor R4 is electrically connected to the non-inverting input terminal of the first comparator a1 and the first end of the fifth resistor R5, and a second end of the fifth resistor R5 is grounded. By adjusting the resistance values of the fourth resistor R4 and the fifth resistor R5, the required first voltage U1 at the non-inverting input terminal of the first comparator a1 can be obtained. The power input terminal of the second comparator a2 is electrically connected to the third voltage U3, and the ground terminal of the second comparator a2 is grounded. A first end of the sixth resistor R6 is electrically connected to the third voltage U3, a second end of the sixth resistor R6 is electrically connected to the non-inverting input terminal of the second comparator a2 and the first end of the seventh resistor R7, and a second end of the seventh resistor R7 is grounded. By adjusting the resistance values of the sixth resistor R6 and the seventh resistor R7, the required second voltage U2 at the non-inverting input terminal of the second comparator a2 can be obtained.
As a specific example, in the present invention, the first comparator a1 is, for example, LM2903DR, the second comparator a2 is, for example, LM2903DR, the triode T is, for example, LMBT3904LT1G, and the relay K is, for example, HFD23/012-1 ZS. The utility model discloses in, line tail resistance's resistance has multiple resistance according to in the trade in the in service behavior, mainly adopts 2.2K omega, 4.7K omega, 5.6K omega and 8.2K omega etc. and line tail resistance is different, and the threshold of window comparator is also different. And because the alarm host has the storage battery power supply condition, the supply voltage value of the alarm host can change, and all the voltages and the supply voltage are in a proportional relation. As follows, the following description is made according to several tail resistance values, assuming that the supply voltage is U:
when the resistance of the first tail resistor R1 is 2.2K Ω, and the resistance of the second tail resistor R2 is 2.2K Ω, the third voltage U3 is U, the first voltage U1 is 0.695U, and the second voltage U2 is 0.495U.
When the resistance of the first tail resistor R1 is 4.7K Ω, and the resistance of the second tail resistor R2 is 4.7K Ω, the third voltage U3 is U, the first voltage U1 is 0.858U, and the second voltage U2 is 0.658U.
The resistance of the first tail resistor R1 is 5.6K Ω, the resistance of the second tail resistor R2 is 5.6K Ω, the third voltage U3 is U, the first voltage U1 is 0.889U, and the second voltage U2 is 0.689U.
The resistance of the first tail resistor R1 is 8.2K Ω, the resistance of the second tail resistor R2 is 8.2K Ω, the third voltage U3 is U, the first voltage U1 is 0.945U, and the second voltage U2 is 0.745U.
The utility model also provides a detection signal transmission circuit, which comprises a state detection unit and a state output unit; the input end of the state detection unit is electrically connected with the signal output end of the detector circuit or between the output end of the previous-stage state output unit and the defense area input end of the preceding-stage alarm host, and the output end of the state detection unit is electrically connected with the control end of the state output unit so as to output a control signal to the state output unit according to the state change of the signal output end of the detector circuit or the state signal change of the output end of the state output unit in the previous-stage alarm circuit; the output end of the state detection unit is electrically connected with the control end of the state output unit; the output end of the state output unit is electrically connected with the defense area input end of the rear-stage alarm host and used for generating a state signal at the output end of the state output unit according to the control signal of the control end of the state output unit.
As shown in fig. 10, a schematic structural diagram of an embodiment of the detection signal transmission circuit is shown, in which only the alarm circuit of 1 stage is provided, and the detection signal transmission circuit is also applicable to a detection alarm device having a multi-stage alarm circuit.
In fig. 10, the probe signal transfer circuit 100 includes a state detection unit 101 and a state output unit 102; the input end of the state detection unit 101 is electrically connected to the signal output end of the detector circuit 200, and the output end of the state detection unit 101 is electrically connected to the control end of the state output unit 102, so as to output a control signal to the state output unit 102 according to the state change of the signal output end of the detector circuit 200; the output end of the state output unit 102 is electrically connected to the defense area input end of the rear-stage alarm host 400, and is configured to generate a state signal at the output end thereof according to the control signal of the control end thereof.
The utility model discloses a detection alarm device and detection signal transfer circuit utilize state detecting element and state output unit to link to each other detector and preceding stage alarm host and back level alarm host, utilize the comparator input impedance infinity among the state detecting element simultaneously, and then do not influence preceding stage alarm host to the characteristics of the judgement of preventing the district state, realized the accurate warning of single detector to a plurality of alarm hosts. In the in-process of evolving to the network alarm host computer by telephone alarm host computer, need ensure the condition of security when upgrading the generation to the product, the utility model discloses the demand of two alarm host computers of same detector electricity is connected has been satisfied to the security demand that needs the redundant work of alarm host computer has been satisfied.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A detection alarm device, comprising:
the device comprises a detector circuit, a preceding stage alarm host and a first alarm circuit; wherein,
the defense area input end of the preceding stage alarm host is electrically connected with the signal output end of the detector circuit so as to alarm according to the state change of the signal output end of the detector circuit;
the first alarm circuit comprises a state detection unit, a state output unit and a rear-stage alarm host; wherein,
the output end of the state detection unit is electrically connected with the control end of the state output unit so as to output a control signal to the state output unit according to the signal change detected by the input end of the state detection unit;
the state output unit is used for generating a state signal at the output end of the state output unit according to the control signal of the control end of the state output unit;
the defense area input end of the rear-stage alarm host is electrically connected with the output end of the state output unit so as to alarm according to the state signal change of the output end of the state output unit;
the input end of the state detection unit is electrically connected with the signal output end of the detector circuit so as to output a control signal to the state output unit according to the state change of the signal output end of the detector circuit.
2. The detection alarm apparatus according to claim 1, wherein:
the detection alarm device also comprises at least 1-stage cascade alarm circuit; wherein,
each stage of alarm circuit in the cascade alarm circuit comprises a state detection unit, a state output unit and a rear stage alarm host; wherein,
the output end of the state detection unit in each stage of alarm circuit is electrically connected with the control end of the state output unit in the alarm circuit of the stage so as to output a control signal to the state output unit in the alarm circuit of the stage according to the signal change detected by the input end of the state detection unit;
the state output unit in each stage of alarm circuit is used for generating a state signal at the output end of the alarm circuit according to the control signal of the control end of the alarm circuit;
the defense area input end of the rear-stage alarm host in each stage of alarm circuit is electrically connected with the output end of the state output unit in the stage of alarm circuit so as to alarm according to the state signal change of the output end of the state output unit in the stage of alarm circuit;
the input end of the state detection unit in each stage of alarm circuit is electrically connected with the output end of the state output unit in the previous stage of alarm circuit, so as to output a control signal to the state output unit of the stage according to the state signal change of the output end of the state output unit in the previous stage of alarm circuit;
the input end of the state detection unit in the first-stage alarm circuit connected to the first alarm circuit is electrically connected to the output end of the state output unit in the first alarm circuit, so as to output a control signal to the state output unit of the first-stage according to the state signal change of the output end of the state output unit in the first alarm circuit.
3. The detection alarm device according to claim 1 or 2, wherein the state detection unit is a window comparison circuit.
4. The detection alarm apparatus according to claim 1, wherein:
the detector circuit comprises a detector and a first tail resistor; wherein,
the detector is a normally open detector, and the output end of the detector is used as the signal output end of a detector circuit and is electrically connected to the defense area input end of the preceding stage alarm host;
the first end of the first tail resistor is electrically connected to the output end of the detector, and the second end of the first tail resistor is electrically connected to the grounding end of the detector and grounded;
the state output unit comprises a relay, an NPN type triode, a third resistor, a freewheeling diode and a second tail resistor; wherein,
the first coil end of the relay is electrically connected to a third voltage;
the second coil end of the relay is electrically connected with the collector electrode of the triode;
the negative pole of the freewheeling diode is electrically connected to the first coil end of the relay, and the positive pole of the freewheeling diode is electrically connected to the second coil end of the relay;
the base electrode of the triode is used as the control end of the state output unit and is electrically connected with the output end of the state detection unit;
the emitting electrode of the triode is grounded;
two ends of the third resistor are respectively and electrically connected with the base electrode and the emitting electrode of the triode;
the public end of the relay is used as the output end of the state output unit and is electrically connected with the defense area input end of the rear-stage alarm host in the first alarm circuit;
the normally open end of the relay is grounded;
the normally closed end of the relay is suspended;
the first end of the second tail resistor is electrically connected to the common end of the relay, and the second end of the second tail resistor is grounded.
5. The detection alarm apparatus according to claim 1, wherein:
the detector circuit comprises a detector and a first tail resistor; wherein,
the detector is a normally open detector, and the output end of the detector is used as the signal output end of a detector circuit and is electrically connected to the defense area input end of the preceding stage alarm host;
the first end of the first tail resistor is electrically connected to the output end of the detector, and the second end of the first tail resistor is electrically connected to the grounding end of the detector and grounded;
the state output unit comprises a relay, an NPN type triode, a third resistor, a freewheeling diode and a second tail resistor; wherein,
the first coil end of the relay is electrically connected to a third voltage;
the second coil end of the relay is electrically connected with the collector electrode of the triode;
the negative pole of the freewheeling diode is electrically connected to the first coil end of the relay, and the positive pole of the freewheeling diode is electrically connected to the second coil end of the relay;
the base electrode of the triode is used as the control end of the state output unit and is electrically connected with the output end of the state detection unit;
the emitting electrode of the triode is grounded;
two ends of the third resistor are respectively and electrically connected with the base electrode and the emitting electrode of the triode;
the common end of the relay is electrically connected to the first end of the second tail resistor;
the normally open end of the relay is suspended;
the normally closed end of the relay is grounded;
and the second end of the second tail resistor is used as the output end of the state output unit and is electrically connected to the defense area input end of the rear-stage alarm host in the first alarm circuit.
6. The detection alarm apparatus according to claim 1, wherein:
the detector circuit comprises a detector and a first tail resistor; wherein,
the detector is a normally closed detector, the output end of the detector is electrically connected to the first end of the first tail resistor, and the grounding end of the detector is grounded;
the second end of the first tail resistor is used as a signal output end of the detector circuit and is electrically connected to the defense area input end of the preceding stage alarm host;
the state output unit comprises a relay, an NPN type triode, a third resistor, a freewheeling diode and a second tail resistor; wherein,
the first coil end of the relay is electrically connected to a third voltage;
the second coil end of the relay is electrically connected with the collector electrode of the triode;
the negative pole of the freewheeling diode is electrically connected to the first coil end of the relay, and the positive pole of the freewheeling diode is electrically connected to the second coil end of the relay;
the base electrode of the triode is used as the control end of the state output unit and is electrically connected with the output end of the state detection unit;
the emitting electrode of the triode is grounded;
two ends of the third resistor are respectively and electrically connected with the base electrode and the emitting electrode of the triode;
the common end of the relay is electrically connected to the first end of the second tail resistor;
the second end of the second tail resistor is used as the output end of the state output unit and is electrically connected to the defense area input end of the rear-stage alarm host in the first alarm circuit;
the normally closed end of the relay is grounded;
the normally open end of the relay is suspended.
7. The detection alarm apparatus according to claim 1, wherein:
the detector circuit comprises a detector and a first tail resistor; wherein,
the detector is a normally closed detector, the output end of the detector is electrically connected to the first end of the first tail resistor, and the grounding end of the detector is grounded;
the second end of the first tail resistor is used as a signal output end of the detector circuit and is electrically connected to the defense area input end of the preceding stage alarm host;
the state output unit comprises a relay, an NPN type triode, a third resistor, a freewheeling diode and a second tail resistor; wherein,
the first coil end of the relay is electrically connected to a third voltage;
the second coil end of the relay is electrically connected with the collector electrode of the triode;
the negative pole of the freewheeling diode is electrically connected to the first coil end of the relay, and the positive pole of the freewheeling diode is electrically connected to the second coil end of the relay;
the base electrode of the triode is used as the control end of the state output unit and is electrically connected with the output end of the state detection unit;
the emitting electrode of the triode is grounded;
two ends of the third resistor are respectively and electrically connected with the base electrode and the emitting electrode of the triode;
the public end of the relay is used as the output end of the state output unit and is electrically connected with the defense area input end of the rear-stage alarm host in the first alarm circuit;
the normally closed end of the relay is suspended;
the normally open end of the relay is grounded;
the first end of the second tail resistor is electrically connected to the common end of the relay, and the second end of the second tail resistor is grounded.
8. The detection alarm apparatus according to claim 1, wherein: and a filter circuit is also electrically connected between the signal output end of the detector circuit and the input end of the state detection unit.
9. A probe signal transmission circuit characterized by:
the device comprises a state detection unit and a state output unit; wherein,
the input end of the state detection unit is electrically connected with the signal output end of the detector circuit or the output end of the state output unit in the previous stage, and the output end of the state detection unit is electrically connected with the control end of the state output unit so as to output a control signal to the state output unit according to the state change of the signal output end of the detector circuit or the state signal change of the output end of the state output unit in the previous stage alarm circuit;
the output end of the state output unit is electrically connected with the defense area input end of the rear-stage alarm host and used for generating a state signal at the output end of the state output unit according to the control signal of the control end of the state output unit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520040206.7U CN204406633U (en) | 2015-01-21 | 2015-01-21 | A kind of detection alarm device and detectable signal transfer circuit |
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| CN201520040206.7U CN204406633U (en) | 2015-01-21 | 2015-01-21 | A kind of detection alarm device and detectable signal transfer circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108230595A (en) * | 2018-01-05 | 2018-06-29 | 佛山市新东方电子技术工程有限公司 | A kind of anti-intrusion warning device and system |
| CN109035728A (en) * | 2018-09-11 | 2018-12-18 | 厦门立林科技有限公司 | A kind of anti-camouflage formula intrusion alarm system |
-
2015
- 2015-01-21 CN CN201520040206.7U patent/CN204406633U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108230595A (en) * | 2018-01-05 | 2018-06-29 | 佛山市新东方电子技术工程有限公司 | A kind of anti-intrusion warning device and system |
| CN109035728A (en) * | 2018-09-11 | 2018-12-18 | 厦门立林科技有限公司 | A kind of anti-camouflage formula intrusion alarm system |
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Granted publication date: 20150617 |