CN209014644U - Security alarm device - Google Patents
Security alarm device Download PDFInfo
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- CN209014644U CN209014644U CN201821526509.XU CN201821526509U CN209014644U CN 209014644 U CN209014644 U CN 209014644U CN 201821526509 U CN201821526509 U CN 201821526509U CN 209014644 U CN209014644 U CN 209014644U
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- voltage comparator
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- comparator circuit
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Abstract
The utility model discloses security alarm devices, are related to electric power overhaul technical field, in the presence of the dangerous technical problem for accidentally touching electricity when alleviating power test existing in the prior art.The security alarm device includes current detector and alarm device；Current detector opens up a wire guide, and wire guide for conducting wire for passing through；Current detector includes current sensor and voltage comparator circuit, and the output end of current sensor is connect with voltage comparator circuit input terminal；Alarm device includes warning circuit, and the output end of voltage comparator circuit is connect with warning circuit, for powering to warning circuit.The security alarm device is able to detect that electric current and generates warning, the danger for avoiding staff from getting an electric shock.
Description
Technical field
The utility model relates to electric power overhaul technical fields, more particularly, to a kind of security alarm device.
Background technique
In high voltage electrical test work, part test working site plane is big, equipment is dispersed, tested device volume is big,
In testing ground, staff can not accomplish comprehensive monitoring in test pressure process；Simultaneously as subject sets electrical connection
Extend length, in equipment pressurization or during through-flow test, equipment connects other end distance test (DT) scene farther out, and there are voltage,
Staff can not accomplish effectively to guard.During applied voltage test, there are distraction phenomenons for testing crew, meanwhile, make
With instrument when being worked, without obvious information warning, staff's presence may accidentally touch tested device, false triggering experimental rig
A possibility that, which increase the security risks during test.
In conclusion there are may accidentally touch galvanic circle or electrification instrument during power test field operation
Device leads to the danger of electric shock, and because cannot intuitively find, scene can not accomplish to prompt or alert that prevention has tired in advance for such danger
It is difficult.
The information disclosed in the background technology section is intended only to deepen the understanding to the utility model general background technology,
And it is not construed as recognizing or implying in any form that the information constitutes the prior art known in those skilled in the art.
Utility model content
The purpose of this utility model is to provide a kind of security alarm devices, to alleviate electric power examination existing in the prior art
In the presence of the dangerous technical problem for accidentally touching electricity when testing.
To solve the above problems, the utility model the following technical schemes are provided:
A kind of security alarm device, including current detector and alarm device；
The current detector opens up a wire guide, and the wire guide for conducting wire for passing through；
The current detector includes current sensor and voltage comparator circuit, the output end of the current sensor and institute
State the connection of voltage comparator circuit input terminal；
The alarm device includes warning circuit, and the output end of the voltage comparator circuit is connect with the warning circuit, is used
It powers in the warning circuit.
Further, the voltage comparator circuit includes first resistor, amplifier and NPN type triode；
The both ends of the first resistor are connect with the firewire input terminal of the voltage comparator circuit and zero curve input terminal respectively；
The electrode input end of the amplifier is connect with one end for being connected to firewire of the first resistor, negative input
It is connect with the other end of the first resistor；
The input terminal of the NPN type triode is connected to the output end of the amplifier, and two of the NPN type triode
Output end is connect with fire wire output end and zero line output end respectively.
Further, the voltage comparator circuit further includes pull-up resistor, the both ends of the pull-up resistor respectively with it is described
The output end of the firewire of the output end of NPN type triode and the voltage comparator circuit connects.
Further, the voltage comparator circuit further includes TVS pipe, the first resistor by the TVS pipe with it is described
The zero curve input terminal of voltage comparator circuit connects.
Further, the warning circuit includes combined aural and visual alarm, the combined aural and visual alarm and the voltage comparator circuit
Output end connection.
Further, the warning circuit includes power interface and power conversion module；
The power interface is connect with the voltage comparator circuit, is powered for the voltage comparator circuit；The power supply connects
Mouth is connect by the power conversion module with the current sensor, is powered for the current sensor.
Further, the warning circuit further includes built-in power, and the built-in power is in parallel with the power interface.
Further, the warning circuit further includes power supply indicator, and the power supply indicator and the power interface are simultaneously
Connection.
Further, the warning circuit includes detection interface, and the current detector includes matching with the detection interface
The detection tabs of conjunction.
Further, the current detector includes detection shell；
The detection shell opens up the wire guide, and the current sensor and the voltage comparator circuit are mounted on institute
It states in detection shell, and the detection shell is isolation material.
In conjunction with above technical scheme, the utility model bring beneficial effect is analyzed as follows:
The utility model provides a kind of security alarm device, which includes current detector and alarm
Device；Current detector opens up a wire guide, and wire guide for conducting wire for passing through；Current detector includes current sensor and voltage
The output end of comparison circuit, current sensor is connect with voltage comparator circuit input terminal；Alarm device includes warning circuit, voltage ratio
Output end compared with circuit is connect with warning circuit, for powering to warning circuit.
When carrying out power test or maintenance, may the send a telegram here lead of side of the high-voltage connection or repair apparatus of testing equipment is worn
Enter in the wire guide of current detector, and current detector is placed on incoming call side and is allowed to keep certain distance with staff.
When the high-voltage connection of testing equipment or repair apparatus may send a telegram here the lead of side there is electric current when, current sensor is able to detect that
Electric current and itself can generate induced current, and induced current is transmitted to voltage comparator circuit, when electric current be greater than it is presetting
When value, the output end of voltage comparator circuit generates voltage, and the warning circuit for being connected to voltage comparator circuit output end generates police
It accuses.The people for receiving warning can be rapidly far from testing equipment or repair apparatus, the danger for avoiding staff from getting an electric shock.
Other feature and advantage of the utility model will illustrate in the following description, also, partly from specification
In become apparent, or understood and implementing the utility model.The purpose of this utility model and other advantages are illustrating
Structure specifically noted by book, claims and attached drawing is achieved and obtained.
Detailed description of the invention
It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art
Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below
In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art
Under the premise of labour, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of circuit detector provided by the embodiment of the utility model；
Fig. 2 is the structural schematic diagram of alarm device provided by the embodiment of the utility model；
Fig. 3 is voltage comparator circuit provided by the embodiment of the utility model；
Fig. 4 is warning circuit provided by the embodiment of the utility model.
Icon: 100- circuit detector；110- detects shell；111- wire guide；120- voltage comparator circuit；121- first
Resistance；122- second resistance；123- 3rd resistor；124- amplifier；125-NPN type triode；126- pull-up resistor；127-
TVS pipe；200- alarm device；210- warning circuit；211- combined aural and visual alarm；212- power interface；213- power conversion module；
214- built-in power；215- power supply indicator；216- detects interface；217- push switch.
Specific embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described
Embodiment is the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, originally
Field those of ordinary skill every other embodiment obtained without making creative work belongs to practical
Novel protected range.
It is in the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only
For ease of description the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have it is specific
Orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.In addition, term " the
One ", " second ", " third " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
The concrete meaning of language in the present invention.
Embodiment is described in detail with reference to the accompanying drawing:
The present embodiment provides a kind of security alarm devices, please with reference to Fig. 1 to Fig. 4 in Figure of description.Fig. 1 is this reality
With the structural schematic diagram for the circuit detector 100 that new embodiment provides；Fig. 2 is alarm device provided by the embodiment of the utility model
200 structural schematic diagram；Fig. 3 is voltage comparator circuit 120 provided by the embodiment of the utility model；Fig. 4 is that the utility model is real
The warning circuit 210 of example offer is provided.
As shown in Figure 1, the security alarm device, including current detector and alarm device 200.
Current detector opens up a wire guide 111, and wire guide 111 for conducting wire for passing through；Current detector includes electric current
The output end of sensor and voltage comparator circuit 120, current sensor is connect with 120 input terminal of voltage comparator circuit；Alarm device
200 include warning circuit 210, and the output end of voltage comparator circuit 120 is connect with warning circuit 210, is used for warning circuit 210
Power supply.
Current sensor is preferably closed-loop type Hall current sensor.Other types current sensor, example can also be used
Such as, open loop shape Hall current sensor.
When carrying out power test or maintenance, may the send a telegram here lead of side of the high-voltage connection or repair apparatus of testing equipment is worn
Enter in the wire guide 111 of current detector, and current detector is placed on incoming call side and is allowed to keep a spacing with staff
From.When the high-voltage connection of testing equipment or repair apparatus may send a telegram here the lead of side there is electric current when, current sensor can be examined
It measures electric current and itself can generate induced current, and induced current is transmitted to voltage comparator circuit 120, when electric current is greater than
When setting value, the output end of voltage comparator circuit 120 generates voltage, is connected to the alarm of 120 output end of voltage comparator circuit
Circuit 210 generates warning.The people for receiving warning can avoid staff rapidly far from testing equipment or repair apparatus
The danger of electric shock.
Further, as shown in figure 3, voltage comparator circuit 120 includes first resistor 121, amplifier 124 and NPN type three
Pole pipe 125.GND indicates the conducting wire for ground line, i.e. zero curve in Fig. 3.
The both ends of first resistor 121 are connect with the firewire input terminal of voltage comparator circuit 120 and zero curve input terminal respectively；It puts
The big electrode input end of device 124 is connect with one end for being connected to firewire of first resistor 121, negative input and first resistor
121 other end connection；The input terminal of NPN type triode is connected to the output end of amplifier 124, and the two of NPN type triode 125
A output end is connect with fire wire output end and zero line output end respectively.
NPN type triode 125 is made of three block semiconductors, wherein two pieces of N-types and one piece of P-type semiconductor composition, p-type half
Conductor is in centre, and two pieces of N-type semiconductors are in two sides.
When tested electric current is less than setting value, amplifier 124 exports low level, and NPN type triode 125 works in cut-off
Area, the no-voltage of 120 output end of voltage comparator circuit, warning circuit 210 will not give a warning.When the raising of tested electric current, it is greater than
When setting value, amplifier 124 exports high level, and NPN type triode 125 works in saturation region, 120 output end of voltage comparator circuit
Voltage is generated, warning circuit 210 gives a warning.
The setting value is preferably 1mA, it is of course also possible to be set as different numerical value according to actual needs, for example, 1.2mA.
Further, as shown in figure 3, voltage comparator circuit 120 further includes pull-up resistor 126, the both ends of pull-up resistor 126
It is connect respectively with the output end of the output end of NPN type triode 125 and the firewire of voltage comparator circuit 120.
Further, as shown in figure 3, voltage comparator circuit 120 further includes TVS pipe 127, first resistor 121 passes through TVS pipe
127 connect with the zero curve input terminal of voltage comparator circuit 120.
TVS (Transient Voltage Suppressor, transient voltage suppressor) is in the high energy for being subjected to moment
It, can be with high speed (up to 10 when stroke-12Second) reduce its impedance suddenly, while a high current is absorbed, it will
The voltage of its two end pieces be fixed on one it is scheduled numerically, so that it is guaranteed that subsequent circuit components are from transient state high-energy
It impacts and damages.
Because in the detection process of electric current, sensed current can not be estimated vertically, if detection electric current is excessive, electricity will cause
It presses comparison circuit 120 to input excessive, may cause burning for component.TVS pipe is accessed in the input terminal of voltage comparator circuit 120
127, it is ensured that when input signal is excessive, component will not be burnt out, circuit can work normally.
Further, as shown in figure 3, voltage comparator circuit 120 further includes second resistance 122 and 3rd resistor 123.
The anode of amplifier 124 is connect by second resistance 122 with the end of first resistor 121, the output of amplifier 124
End is connect through 3rd resistor 123 with the input terminal of NPN type triode 125.
Further, as shown in Figure 2 and Figure 4, warning circuit 210 include combined aural and visual alarm 211, combined aural and visual alarm 211 with
The output end of voltage comparator circuit 120 connects.
When tested electric current increases, when being greater than the set value, amplifier 124 exports high level, and NPN type triode 125 works in
Saturation region, 120 output end of voltage comparator circuit generate voltage, the combined aural and visual alarm 211 of warning circuit 210 issue alarm sound and
Alarm light.When staff hears alarm sound or sees alarm light rapidly far from tested device or tested equipment, keep away
Exempt to get an electric shock.
Further, as shown in Figure 2 and Figure 4, warning circuit 210 includes power interface 212 and power conversion module 213.
Power interface 212 is connect with voltage comparator circuit 120, is powered for voltage comparator circuit 120；Power interface 212 is logical
It crosses power conversion module 213 to connect with current sensor, power for current sensor.
External power supply is security alarm device power supply by power interface 212, which is preferably 12V.Power supply
Interface 212 is connected in Fig. 3 at VCC by conducting wire, is powered for voltage comparator circuit 120.Power interface 212 passes through conducting wire and electricity
The input terminal of source conversion module 213 connects, and by taking external power supply is 12V as an example, power conversion module 213 can be converted to 12V
It is connect after positive and negative 12V with current sensor, powers for current sensor, current sensor is made to be able to detect electrical equipment lead
The electric current of positive and negative both direction, so guarantee no matter on lead which kind of direction of electric current can the lead security alarm device report
It is alert, guarantee the safety of staff.
Further, as shown in figure 4, warning circuit 210 further includes built-in power 214, built-in power 214 and power interface
212 is in parallel.
Built-in power 214 can guarantee be inconvenient to pass through when power interface 212 connects external power supply for the security alarm
Device power supply, extends the scope of application of the security alarm device.The voltage of the built-in power 214 is preferably 12V.
Further, as shown in figure 4, warning circuit 210 further includes power supply indicator 215, power supply indicator 215 and power supply
Interface 212 is in parallel.
When point built-in power 214 or external power supply are connected to, the power supply indicator 215 is bright, is showing the security alarm device just
In in running order, staff can work contentedly.If after built-in power 214 or external power supply connection, power supply indicator
215 do not work, and show that the security alarm device has damage, after needing that security alarm device is replaced or repaired, staff
The test or maintenance of equipment are carried out again.As shown in figure 4, the power supply indicator 215 is preferably light emitting diode.
Further, as shown in Figure 2 and Figure 4, warning circuit 210 includes detection interface 216, and current detector includes and inspection
Survey the detection tabs that interface 216 cooperates.
Detection interface 216 and detection tabs realize being detachably connected for alarm device 200 and current detector.When the safety
Alarm device when not in use, will test connector and take out from detection interface 216, facilitate the preservation of the security alarm device.
Further, as shown in Figure 1, current detector includes detection shell 110；Detection shell 110 opens up wire guide
111, current sensor and voltage comparator circuit 120 are mounted in detection shell 110, and detecting shell 110 is isolation material.
If detection shell 110 is nonisulated material, such as metal material, when the lead of electrical equipment generate electric current when
It waits, the shielding of the electric current may be made to detect the current sensor in shell 110 and incuded less than in lead by detection shell 110
Electric current, and make warning circuit 210 that can not alarm, staff will be made to face a danger.The detection shell 110 of isolation material prevents
The generation of above situation, ensure that security alarm device can accurately alarm, the danger for avoiding staff from getting an electric shock.
Finally, it should be noted that above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations；
Although the utility model is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that:
It can still modify to technical solution documented by previous embodiment, or to some or all of the technical features
It is equivalently replaced；And these are modified or replaceed, the utility model embodiment that it does not separate the essence of the corresponding technical solution
The range of technical solution.
Claims (10)
1. a kind of security alarm device, which is characterized in that including current detector and alarm device；
The current detector opens up a wire guide, and the wire guide for conducting wire for passing through；
The current detector includes current sensor and voltage comparator circuit, the output end of the current sensor and the electricity
Pressure ratio is connected compared with circuit input end；
The alarm device includes warning circuit, and the output end of the voltage comparator circuit is connect with the warning circuit, for
The warning circuit power supply.
2. security alarm device according to claim 1, which is characterized in that the voltage comparator circuit includes the first electricity
Resistance, amplifier and NPN type triode；
The both ends of the first resistor are connect with the firewire input terminal of the voltage comparator circuit and zero curve input terminal respectively；
The electrode input end of the amplifier is connect with one end for being connected to firewire of the first resistor, negative input and institute
State the other end connection of first resistor；
The input terminal of the NPN type triode is connected to the output end of the amplifier, two outputs of the NPN type triode
End is connect with fire wire output end and zero line output end respectively.
3. security alarm device according to claim 2, which is characterized in that the voltage comparator circuit further includes pull-up electricity
Resistance, the both ends of the pull-up resistor firewire with the output end of the NPN type triode and the voltage comparator circuit respectively
Output end connection.
4. security alarm device according to claim 3, which is characterized in that the voltage comparator circuit further includes TVS pipe,
The first resistor is connect by the TVS pipe with the zero curve input terminal of the voltage comparator circuit.
5. security alarm device according to claim 1-4, which is characterized in that the warning circuit includes acousto-optic
Alarm, the combined aural and visual alarm are connect with the output end of the voltage comparator circuit.
6. security alarm device according to claim 5, which is characterized in that the warning circuit includes power interface and electricity
Source conversion module；
The power interface is connect with the voltage comparator circuit, is powered for the voltage comparator circuit；The power interface is logical
It crosses the power conversion module to connect with the current sensor, power for the current sensor.
7. security alarm device according to claim 6, which is characterized in that the warning circuit further includes built-in power,
The built-in power is in parallel with the power interface.
8. security alarm device according to claim 7, which is characterized in that the warning circuit further includes power supply instruction
Lamp, the power supply indicator are in parallel with the power interface.
9. security alarm device according to claim 8, which is characterized in that the warning circuit includes detection interface, institute
Stating current detector includes the detection tabs with the detection Interference fit.
10. security alarm device according to claim 1, which is characterized in that the current detector includes detection shell；
The detection shell opens up the wire guide, and the current sensor and the voltage comparator circuit are mounted on the inspection
It surveys in shell, and the detection shell is isolation material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821526509.XU CN209014644U (en) | 2018-09-18 | 2018-09-18 | Security alarm device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821526509.XU CN209014644U (en) | 2018-09-18 | 2018-09-18 | Security alarm device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209014644U true CN209014644U (en) | 2019-06-21 |
Family
ID=66833552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821526509.XU Active CN209014644U (en) | 2018-09-18 | 2018-09-18 | Security alarm device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209014644U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108896810A (en) * | 2018-09-18 | 2018-11-27 | 国网青海省电力公司检修公司 | Security alarm device |
-
2018
- 2018-09-18 CN CN201821526509.XU patent/CN209014644U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108896810A (en) * | 2018-09-18 | 2018-11-27 | 国网青海省电力公司检修公司 | Security alarm device |
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