CN204929012U - Jam -proof camera - Google Patents
Jam -proof camera Download PDFInfo
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- CN204929012U CN204929012U CN201520729316.4U CN201520729316U CN204929012U CN 204929012 U CN204929012 U CN 204929012U CN 201520729316 U CN201520729316 U CN 201520729316U CN 204929012 U CN204929012 U CN 204929012U
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Abstract
The utility model discloses a jam -proof camera, including field intensity detection circuitry, field intensity detection circuitry includes the signal reception end for receiving environment field strong signal, the signal amplification module is coupled and holds in signal reception for amplify environment field strong signal, the power supply is coupled in the signal amplification module to provide amplifier circuit, instruction portion is coupled in the signal amplification module, switches on when the electric current that flows through instruction portion exceedes a default. Detection circuitry detects it through the field intensity to with the current amplification of this detected signal, when the electric current that enlargies exceeded the default, instruction portion switches on reminded the present camera mounted position of user to adjust, in another scene, if the user discovers the camera and the cord of roll state appears, just is in operating condition through observing the interior instruction portion of front and back time that the cord appears that discovers, so can help the electric current of the supplementary judgement instruction portion of user big or small.
Description
Technical field
The utility model relates to a kind of watch-dog, and more particularly, it relates to a kind of anti-tampering camera.
Background technology
Gamma camera camera type is various, and the general principle of its work is all the same: optical image signal is changed into the signal of telecommunication, so that store or transmission.When we take an object, the light that this object reflects camera shots being shot, makes on its sensitive surface focusing on picture pick-up device (target surface of such as camera tube), then by picture pick-up device, light is changed into electric energy, namely obtain " vision signal ".Photosignal is very faint, need be amplified by pre-arcing road, carry out processing and adjusting through various circuit again, the standard signal finally obtained can be delivered on the recording mediums such as video tape recorder and record, or is propagated by broadcasting system or deliver on monitor and show.But there is a problem in video camera at present, when making a video recording or monitor, sometimes there will be the coarse groove of rolling, the normal display of interference, this situation may have two reason: a, power supply adaptor quality (ripple is excessive) is aging or bad causes, and now compares by a good video camera, use same power supply adaptor, if phenomenon disappears, be that video camera itself is aging and cause, advise returning maintenance, otherwise then change power supply adaptor.B, machine occur that cord rolling is generally system wiring and whether is subject to highfield interference, and suggestion machine is avoided forceful electric power and installed, connects up, and whether inspection ground wire is firm, is secondly change power supply.For second reason, user cannot judge whether it is normal condition, so need the anti-tampering camera of a kind of one that can determine whether that forceful electric power disturbs.
Utility model content
For the deficiency that prior art exists, the purpose of this utility model is that providing a kind of detects the anti-tampering camera of one that forceful electric power interference strength also can realize reminding user.
For achieving the above object, the utility model provides following technical scheme: a kind of anti-tampering camera, comprises field intensity testing circuit, and described field intensity testing circuit comprises signal receiving end, for reception environment field intensity signal; Signal amplification module, is coupled to signal receiving end, for amplifying environment field intensity signal; Power supply, is coupled to signal amplification module, and provides amplifying circuit; Instruction unit, is coupled to signal amplification module, when flowing through the electric current of instruction unit more than conducting during a preset value.
Such setting, by a receiving terminal, field strength is detected, when needing near the position of installing or when occurring that forceful electric power disturbs near mounted position, by field intensity testing circuit, it is detected, and by the Current amplifier of this detection signal, when the electric current amplified exceedes preset value, instruction unit conducting reminds position, user current camera installation site to adjust, in another scene, if user finds that the cord of rolling condition appears in camera, and it is in running order through observing instruction unit in the surrounding time finding to occur cord, so the size of current of user's auxiliary judgment instruction unit can be helped.
The utility model can be set to further: described signal amplification module comprises the first enlarging section, the second enlarging section and the 3rd enlarging section.By the amplification of three enlarging sections, amplified current can be increased when signal stabilization, ensure that amplified current is also under being in a stable state, and ensure that gain amplifier.
The utility model can be set to further: described first enlarging section comprises the first triode and the first resistance, and the base stage of described first triode is coupled to signal receiving end, and collector electrode is coupled to the first resistance; Described second enlarging section comprises the second triode and the second resistance, and the base stage of described second triode is coupled to the emitter of the first triode, and the collector electrode of described second triode is coupled to the second resistance; Described 3rd enlarging section comprises the 3rd triode and the 3rd resistance, and the base stage of described 3rd triode is coupled to the emitter of the second triode, and the collector electrode of described 3rd triode is coupled to the 3rd resistance.Amplified by three triodes, its gain amplifier can reach 8, and 000,000 and the precision of instruction unit can be improved in this gain.
The utility model can be set to further: described instruction unit comprises light-emitting diode, and the negative electrode of described light-emitting diode is connected to the 3rd resistance, and its anode is connected to power supply.By the setting of light-emitting diode, one can play an effect detected, and when the electric current flow through is greater than preset value, light-emitting diode just by starter, can be arranged power consumption less, ensure that useful life equally like this.
The utility model can be set to further: described instruction unit also comprises piezoelectric buzzer, and an end of described piezoelectric buzzer is connected to the anode of light-emitting diode, and its other end is connected to the 3rd transistor collector.By the setting of piezoelectric buzzer, an auxiliary prompting effect can be played, abnormal conditions are more easily discovered by user.
The utility model can be set to further: described signal receiving end is coupled with a copper foil plate.The ability that can strengthen and detect electric field is set like this, ensures accuracy of detection.
By adopting technique scheme, serve following effect compared to existing technology: arrange like this, by a receiving terminal, field strength is detected, when needing near the position of installing or when occurring that forceful electric power disturbs near mounted position, by field intensity testing circuit, it is detected, and by the Current amplifier of this detection signal, when the electric current amplified exceedes preset value, instruction unit conducting reminds position, user current camera installation site to adjust, in another scene, if user finds that the cord of rolling condition appears in camera, and it is in running order through observing instruction unit in the surrounding time finding to occur cord, so the size of current of user's auxiliary judgment instruction unit can be helped.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation;
Fig. 2 is circuit diagram one.
Reference numeral: 10, signal receiving end; 11, copper foil plate; 21, the first enlarging section; 22, the second enlarging section; 23, the 3rd enlarging section; 31, instruction unit; 41, power supply.
Embodiment
Referring to figs. 1 through Fig. 2, the utility model embodiment is described further.
A kind of anti-tampering camera, comprise field intensity testing circuit, described field intensity testing circuit comprises
With reference to shown in Fig. 2, signal receiving end 10, for reception environment field intensity signal; Described signal receiving end 10 is coupled with a copper foil plate 11.
Signal amplification module, is coupled to signal receiving end 10, for amplifying environment field intensity signal; Described signal amplification module comprises the first enlarging section 22, enlarging section 21, second and the 3rd enlarging section 23.Described first enlarging section 21 comprises the first triode Q1 and the first resistance R1, and the base stage of described first triode Q1 is coupled to signal receiving end 10, and collector electrode is coupled to the first resistance R1; Described second enlarging section 22 comprises the second triode Q2 and the second resistance R2, and the base stage of described second triode Q2 is coupled to the emitter of the first triode Q1, and the collector electrode of described second triode Q2 is coupled to the second resistance R2; Described 3rd enlarging section 23 comprises the 3rd triode Q3 and the 3rd resistance R3, and the base stage of described 3rd triode Q3 is coupled to the emitter of the second triode Q2, and the collector electrode of described 3rd triode Q3 is coupled to the 3rd resistance R3.The model of described first triode Q1, the second triode Q2, the 3rd triode Q3 is preferably set to BC547, first resistance R1 resistance is set to 1M ohm, second resistance R2 resistance is set to 100K Europe, and the 3rd resistance R3 resistance is set to 220 Europe, and its gain is 8000000 ohm.
Power supply 41, is coupled to signal amplification module, and provides amplifying circuit, be set to DC power supply E1;
Instruction unit 31, is coupled to signal amplification module, when flowing through the electric current of instruction unit more than conducting during a preset value.Described instruction unit comprises LED, and the negative electrode of described LED is connected to the 3rd resistance R3, and its anode is connected to power supply.Described instruction unit also comprises piezoelectric buzzer SP, and an end of described piezoelectric buzzer SP is connected to the anode of light-emitting diode, and its other end is connected to the 3rd triode Q3 collector electrode.
The above is only preferred implementation of the present utility model, protection range of the present utility model be not only confined to above-described embodiment, and all technical schemes belonged under the utility model thinking all belong to protection range of the present utility model.It should be pointed out that for those skilled in the art, do not departing from the some improvements and modifications under the utility model principle prerequisite, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (6)
1. an anti-tampering camera, is characterized in that: comprise field intensity testing circuit, and described field intensity testing circuit comprises
Signal receiving end, for reception environment field intensity signal;
Signal amplification module, is coupled to signal receiving end, for amplifying environment field intensity signal;
Power supply, is coupled to signal amplification module, and provides amplifying circuit;
Instruction unit, is coupled to signal amplification module, when flowing through the electric current of instruction unit more than conducting during a preset value.
2. a kind of anti-tampering camera as claimed in claim 1, is characterized in that: described signal amplification module comprises the first enlarging section, the second enlarging section and the 3rd enlarging section.
3. a kind of anti-tampering camera as claimed in claim 2, is characterized in that:
Described first enlarging section comprises the first triode and the first resistance, and the base stage of described first triode is coupled to signal receiving end, and collector electrode is coupled to the first resistance;
Described second enlarging section comprises the second triode and the second resistance, and the base stage of described second triode is coupled to the emitter of the first triode, and the collector electrode of described second triode is coupled to the second resistance;
Described 3rd enlarging section comprises the 3rd triode and the 3rd resistance, and the base stage of described 3rd triode is coupled to the emitter of the second triode, and the collector electrode of described 3rd triode is coupled to the 3rd resistance.
4. a kind of anti-tampering camera as claimed in claim 3, is characterized in that: described instruction unit comprises light-emitting diode, and the negative electrode of described light-emitting diode is connected to the 3rd resistance, and its anode is connected to power supply.
5. a kind of anti-tampering camera as claimed in claim 4, is characterized in that: described instruction unit also comprises piezoelectric buzzer, and an end of described piezoelectric buzzer is connected to the anode of light-emitting diode, and its other end is connected to the 3rd transistor collector.
6. the anti-tampering camera of one as described in claim 1 or 2 or 3 or 4 or 5, is characterized in that: described signal receiving end is coupled with a copper foil plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520729316.4U CN204929012U (en) | 2015-09-19 | 2015-09-19 | Jam -proof camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520729316.4U CN204929012U (en) | 2015-09-19 | 2015-09-19 | Jam -proof camera |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204929012U true CN204929012U (en) | 2015-12-30 |
Family
ID=54978106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520729316.4U Expired - Fee Related CN204929012U (en) | 2015-09-19 | 2015-09-19 | Jam -proof camera |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204929012U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109428989A (en) * | 2017-08-28 | 2019-03-05 | 深圳传音通讯有限公司 | A kind of camera assembly of anti-crosstalk |
-
2015
- 2015-09-19 CN CN201520729316.4U patent/CN204929012U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109428989A (en) * | 2017-08-28 | 2019-03-05 | 深圳传音通讯有限公司 | A kind of camera assembly of anti-crosstalk |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151230 Termination date: 20190919 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |