CN214704025U

CN214704025U - Transformer isolation detection circuit, isolation detection equipment and high-voltage pulse electronic fence

Info

Publication number: CN214704025U
Application number: CN202120494997.6U
Authority: CN
Inventors: 符家鑫
Original assignee: Shenzhen Aleph Security Equipment Co ltd
Current assignee: Shenzhen Aleph Security Equipment Co ltd
Priority date: 2021-03-08
Filing date: 2021-03-08
Publication date: 2021-11-12
Anticipated expiration: 2031-03-08

Abstract

The embodiment of the utility model discloses detection circuitry is kept apart to transformer and isolation check out test set and high-voltage pulse fence, wherein, detection circuitry is kept apart to transformer includes transformer, high frequency signal generator and high frequency load current detector, and wherein, high frequency signal generator's output is connected to the primary winding's of transformer first input, and high frequency load current detector's output is connected to the primary winding's of transformer second input. The utility model discloses a detection circuitry is kept apart to transformer and isolation check out test set and high-voltage pulse fence keep apart through the transformer and detect, and the realization that can be convenient is elementary and the high voltage isolation between the secondary, and the cost is moderate relatively moreover, does not rely on lazy external energy simultaneously, can detect through self energy transfer.

Description

Transformer isolation detection circuit, isolation detection equipment and high-voltage pulse electronic fence

Technical Field

The utility model relates to a circuit field especially relates to a detection circuitry is kept apart to transformer and keeps apart check out test set and high-voltage pulse fence.

Background

At present, in perimeter security products, a 'high-voltage pulse electronic fence' is more and more widely applied, and a 'high-voltage pulse electronic fence host machine' can generate discontinuous high-voltage pulses to supply to metal fences installed on the perimeter. When illegal invasion exists, a high-voltage electric shock is given to an invader, and an alarm is given. When the fence is damaged (such as short circuit and shearing of the fence), the high-voltage pulse electronic fence host machine can send out an alarm.

However, the alarm detection of the host for illegal intrusion and fence damage is performed by isolation detection of the state of the high-voltage side in a photoelectric isolation mode at present, however, the isolation strength of the photoelectric isolation scheme is often insufficient, and the high voltage of the fence side can break down the isolation device to damage the host. All photoelectric isolation detection schemes rely on high-voltage pulse energy emitted by a host to drive a photoelectric isolation device, so that detection is realized. Therefore, the detection circuit needs to reduce the voltage and limit the current, the hardware cost is increased, and the energy of the high-voltage pulse is consumed.

SUMMERY OF THE UTILITY MODEL

In view of this, the embodiment of the utility model provides a detection circuitry is kept apart to transformer and isolation check out test set and high-voltage pulse fence keeps apart through the transformer and detects, and the realization that can be convenient is elementary and the high voltage between the secondary keeps apart, and the cost is moderate relatively moreover, does not rely on lazy external energy simultaneously, can do energy transfer through self and detect.

An embodiment of the utility model provides a detection circuitry is kept apart to transformer, wherein, detection circuitry is kept apart to transformer includes transformer, high frequency signal generator and high frequency load current detector, wherein, the first input of the primary coil of transformer is connected the output of high frequency signal generator, the second input of the primary coil of transformer is connected high frequency load current detector's output.

In a possible solution, the transformer isolation detection circuit further includes a first resistor, one end of the first resistor is connected to the output end of the high-frequency signal generator, and the other end of the first resistor is connected to the first input end of the primary coil of the transformer.

In a possible solution, the transformer isolation detection circuit further includes a second resistor, one end of the second resistor is connected to the output end of the high-frequency load current detector, and the other end of the second resistor is grounded.

In one possible embodiment, the first output of the secondary winding of the transformer is connected to the high-voltage positive output of the pulsed high-voltage generator circuit.

In one possible embodiment, the second output of the secondary winding of the transformer is connected to a loop terminal of the pulsed high voltage generation circuit.

In one possible embodiment, the high-voltage ground of the pulsed high-voltage generator circuit is grounded.

The embodiment of the utility model provides a still provide an keep apart check out test set, wherein, keep apart check out test set and include above-mentioned arbitrary transformer keep apart detection circuitry.

The embodiment of the utility model provides a still provide a high-voltage pulse fence, wherein, high-voltage pulse fence includes any one of the aforesaid transformer keep apart detection circuitry.

According to the above technical scheme, the utility model discloses a transformer keeps apart and detects, and realization that can be convenient is elementary and the high voltage between the secondary keeps apart, and the cost is moderate relatively moreover, does not rely on lazy external energy simultaneously, can detect through self being energy transfer.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a schematic structural diagram of a transformer isolation detection circuit according to an embodiment of the present invention;

fig. 2 is a schematic diagram of a first application structure of a transformer isolation detection circuit according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a second application structure of a transformer isolation detection circuit according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a third application structure of a transformer isolation detection circuit according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention.

In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as a fixed connection, a detachable connection, or an integral part; the connection can be mechanical connection, electrical connection or communication connection; either directly or indirectly through intervening media, either internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art. The technical solution of the present invention will be described in detail with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.

The following will describe the transformer isolation detection circuit provided by the present invention in detail.

Fig. 1 is a schematic structural diagram of a transformer isolation detection circuit according to an embodiment of the present invention.

In the present embodiment, the transformer isolation detection circuit includes a transformer T1, a high frequency signal generator, and a high frequency load current detector, wherein a first input terminal 1 of the primary coil of the transformer T1 is connected to an output terminal of the high frequency signal generator, and a second input terminal 2 of the primary coil of the transformer T1 is connected to an output terminal of the high frequency load current detector. In the embodiment, the isolation detection is performed through the transformer T1, so that the high-voltage isolation between the primary and the secondary can be conveniently realized, and the cost is relatively moderate. In the present embodiment, the connection state of the secondary side of the transformer T1 is determined by detecting the primary high-frequency load current of the transformer T1, and when the fence state is detected by this method, the high-voltage and low-voltage interval intensity is large, and the high-voltage output energy is not affected by the high-voltage pulse energy emitted from the main machine.

In this embodiment, the transformer isolation detection circuit further includes a first resistor R1, one end of the first resistor R1 is connected to the output terminal of the high-frequency signal generator, and the other end of the first resistor R1 is connected to the first input terminal 1 of the primary coil of the transformer T1.

In this embodiment, the transformer isolation detection circuit further includes a second resistor R2, one end of the second resistor R2 is connected to the output terminal of the high-frequency load current detector, and the other end of the second resistor R2 is grounded.

Please refer to fig. 2, which is a schematic diagram of a first application structure of a transformer isolation detection circuit according to an embodiment of the present invention.

In the present embodiment, the first output terminal 3 of the secondary winding of the transformer T1 is connected to the high-voltage positive output terminal of the pulse high-voltage generation circuit.

In the present embodiment, the second output terminal 4 of the secondary winding of the transformer T1 is connected to the loop terminal of the pulsed high voltage generation circuit, so that the two

output terminals

3 and 4 of the secondary winding of the transformer T1 and the external high voltage line form a detection loop, wherein the loop in the detection loop is equipotential and has no high voltage current loss, and the detection loop does not depend on the high voltage pulse energy from the host and does not affect the high voltage output energy.

In the present embodiment, the high-voltage ground of the pulse high-voltage generation circuit is grounded.

In the embodiment, when a person touches the high-voltage line, the high-voltage current of the touch net flows to the ground from the human body, and the connection state of the secondary side of the transformer T1 is judged by detecting the primary high-frequency load current of the transformer T1.

Please refer to fig. 3, which is a schematic diagram of a second application structure of a transformer isolation detection circuit according to an embodiment of the present invention.

In this embodiment, when someone touches the high-voltage line and the high-voltage line has a breakpoint, the line at the rear end of the breakpoint will remain connected through the secondary coil of the transformer T1, and after the breakpoint, because of the presence of the detection circuit, the high-voltage power is still provided, the disconnection alarm of the fence loop is easily realized through the structure diagram shown in fig. 3, and the line at the rear end of the breakpoint will remain connected through the secondary coil of the transformer T1, which also ensures the output of high-voltage pulses, and improves the reliability of high-voltage defense.

Please refer to fig. 4, which is a schematic diagram of a third application structure of a transformer isolation detection circuit according to an embodiment of the present invention.

In this embodiment, when there is an illegal short circuit in the high-voltage line, the alarm is output by detecting the impedance change of the loop, and the alarm of the short circuit of the high-voltage phase line is easily realized by the structural diagram shown in fig. 4, that is: after the high-voltage output interface of the host is illegally short-circuited, the host can give an alarm without cutting off the rear fence line. The principle is as follows: the impedance of the loop changes due to illegal short circuit, the transformer isolation detection circuit can detect the impedance of the loop, and when the impedance changes to a certain value, an alarm is given out.

Additionally, the utility model also provides an keep apart check out test set, wherein, keep apart check out test set and include above-mentioned arbitrary the transformer keep apart detection circuitry.

Furthermore, the embodiment of the utility model provides a high-voltage pulse fence is still provided, wherein, high-voltage pulse fence includes any one of the aforesaid transformer isolation detection circuitry.

The utility model provides a technical scheme has following advantage: keep apart through the transformer and detect, realization that can be convenient is elementary and the high voltage between the secondary keeps apart, and the cost is moderate relatively, does not rely on lazy external energy simultaneously, can do energy transfer through self and detect, realize the broken string of rail return circuit and report to the police moreover easily, and the line of breakpoint rear end can keep communicateing through the secondary coil of transformer, has also ensured high-voltage pulse's output, has improved the reliability of high-pressure defense, also realizes high-pressure homophase line short circuit warning very easily in addition.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

In the present application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first feature or the second feature or indirectly contacting the first feature or the second feature through an intermediate.

Also, a first feature "on," "above," and "over" a second feature may mean that the first feature is directly above or obliquely above the second feature, or that only the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lower level than the second feature.

In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example" or "some examples," or the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. A transformer isolation detection circuit comprises a transformer, a high-frequency signal generator and a high-frequency load current detector, wherein a first input end of a primary coil of the transformer is connected with an output end of the high-frequency signal generator, and a second input end of the primary coil of the transformer is connected with an output end of the high-frequency load current detector.

2. The transformer isolation detection circuit according to claim 1, further comprising a first resistor, one end of the first resistor being connected to the output terminal of the high frequency signal generator, and the other end of the first resistor being connected to the first input terminal of the primary coil of the transformer.

3. The transformer isolation detection circuit according to claim 1, further comprising a second resistor, one end of the second resistor being connected to the output terminal of the high frequency load current detector, and the other end of the second resistor being grounded.

4. The transformer isolation detection circuit of claim 1, wherein the first output of the secondary winding of the transformer is connected to the high voltage positive output of the pulsed high voltage generation circuit.

5. The transformer isolation detection circuit of claim 4, wherein the second output terminal of the secondary winding of the transformer is connected to a loop terminal of the pulsed high voltage generation circuit.

6. The transformer isolation detection circuit of claim 5, wherein a high voltage ground of the pulsed high voltage generation circuit is grounded.

7. An isolation detection device, characterized in that it comprises a transformer isolation detection circuit according to any of the preceding claims 1-6.

8. A high voltage pulse electronic fence, characterized in that it comprises a transformer isolation detection circuit according to any of the preceding claims 1-6.