CN201152871Y - Visibility instrument - Google Patents
Visibility instrument Download PDFInfo
- Publication number
- CN201152871Y CN201152871Y CNU2007203104402U CN200720310440U CN201152871Y CN 201152871 Y CN201152871 Y CN 201152871Y CN U2007203104402 U CNU2007203104402 U CN U2007203104402U CN 200720310440 U CN200720310440 U CN 200720310440U CN 201152871 Y CN201152871 Y CN 201152871Y
- Authority
- CN
- China
- Prior art keywords
- power supply
- supply circuit
- pressure
- visiometer
- sensitive device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model discloses a visibility meter, the power supply circuit of which comprises an external power supply circuit and an internal power supply circuit, wherein, a socket connector, a safety device and a lightning grounding device which are used for connecting the external power supply circuit are in series connected with each other in turn in the internal power supply circuit; a pressure-sensitive device is in series connected between the earth end of the lightning grounding device and the ground. Under the normal working condition, the pressure-sensitive device is in a high resistance state, so as to reduce common-mode voltage interference in the internal power supply circuit; once the visibility meter encounters lightning, the internal power supply circuit produces strong surge current and large surge voltage, and the pressure-sensitive device is started and conducted; when the voltage produced when the surge current contacts with the ground is larger than the threshold voltage of the pressure-sensitive device, the pressure-sensitive device is conducted in a low resistance state; the surge current is released to the ground, so as to prevent the visibility meter from being damaged.
Description
Technical field
The utility model relates to the visiometer technical field.
Background technology
Visiometer need non-stop run in 24 hours in measurement environment, it needs the externally fed power supply that it is powered, its measurement environment is generally outdoor, therefore when this instrument of design, need consider the influence of external environment, particularly at thunderstorm weather, need guarantee view degree instrument when being hit by thunder and lightning its power supply also want operate as normal; In addition, because visiometer uses powered by direct current, when needs connect the externally fed power supply,, cause unnecessary loss because maloperations such as manual operation such as positive and negative reversal connection just might be damaged instrument.
The utility model content
Even providing a kind of the thunderbolt in bad weather conditions, the purpose of this utility model still can guarantee the visiometer of steady operation.
A kind of visiometer, its power circuit comprise the externally fed power supply and in connect power circuit, in connect the connector that is used to connect the externally fed power supply in the power circuit, insurance device and lightning protection component and be connected in series in turn, wherein: all be serially connected with a pressure-sensitive device between the earth terminal of lightning protection component and the ground.
Described visiometer, wherein: described pressure-sensitive device is a voltage dependent resistor (VDR).
Described visiometer, wherein: described connector is three core connectors, has three independently input ends, and distinguishes three output terminals one to one with respective input, wherein two input ends are respectively applied for positive pole, the negative pole that connects the externally fed power supply, and another input end is unsettled.
Described visiometer, wherein: described three core connectors, wherein, a corresponding output terminal with two input ends of the positive pole that is used for connecing respectively the externally fed power supply, negative pole, the late-class circuit that the output terminal corresponding with unsettled input end, described two output terminals serial connection back contact and another output terminal are used for internally connecing power circuit provides both positive and negative polarity to export.
The utility model adopts technique scheme will reach following technique effect:
Visiometer of the present utility model, connect within it between each lightning protection component earth terminal and the ground in the power circuit and respectively be connected in series a pressure-sensitive device, in normal operation, pressure-sensitive device is high-impedance state, in case visiometer is accepted thunderbolt, connect power circuit generation high seas in it and gush electric current and big surge voltage, described lightning protection component starts conducting, the voltage that produces at its earth terminal when surge voltage is during greater than the threshold voltage of pressure-sensitive device, the pressure-sensitive device conducting, present low resistive state, surge current is discharged into the earth, prevent that it from damaging visiometer; In addition, the pressure-sensitive device under the normal operating conditions is high-impedance state, connects the common mode voltage that produces between two lightning protection components in the power circuit in can also avoiding and disturbs, and guarantees that late-class circuit components and parts supply voltage is stable, improves the service efficiency of product.In addition, in the connector that connects in the power circuit adopt connector, 3-pin, two input end serial connections with connector, connect the positive pole of externally fed power supply, the 3rd input end is used to connect the negative pole of externally fed power supply, when preventing that externally power supply connects connector, because the people is maloperation, the attaching plug anisotropy, the damage equipment and instrument causes unnecessary loss.
Description of drawings
Fig. 1 is the theory diagram of visiometer power circuit;
Fig. 2 is a kind of connection diagram that is connected to the connector of externally fed power supply;
Fig. 3 is the another kind of connection diagram that is connected to the connector of externally fed power supply.
Embodiment
Embodiment:
A kind of visiometer, its power circuit comprise the externally fed power supply and in connect power circuit, in connect the connector that is used to connect the externally fed power supply in the power circuit, insurance device and lightning protection component and be connected in series in turn, also be serially connected with a voltage dependent resistor (VDR) between the earth terminal of lightning protection component and the ground, see the theory diagram of visiometer power circuit shown in Figure 1.
In normal operation, this voltage dependent resistor (VDR) is high resistant, in case visiometer is accepted thunderbolt, connect power circuit generation high seas in it and gush electric current and big surge voltage, described lightning protection component starts conducting, by its earth terminal discharging surge current, the voltage that produces at its earth terminal when surge voltage is during greater than the threshold voltage of voltage dependent resistor (VDR), and the voltage dependent resistor (VDR) conducting presents low resistive state, surge current is discharged into the earth, prevents that it from damaging visiometer; In addition, the voltage dependent resistor (VDR) under the normal operating conditions is high-impedance state, and the common mode voltage that connects in can also avoiding in the power circuit disturbs, and guarantees that late-class circuit components and parts supply voltage is stable, improves the service efficiency of product.
Fig. 2 is a kind of connector connection diagram that is connected to the externally fed power supply, connector adopts three core connectors, its input end has three inputs of 1,2,3 pin pin, its output terminal has three output connecting pins of 1 ', 2 ', 3 ' pin, the externally fed power supply is a direct supply, its power lead is two core twisted-pair feeders, with input end 1 pin of this three cores connector, 2 pin respectively with the corresponding connection of positive pole, negative pole of externally fed power supply, another input end 3 pin are unsettled, and its output terminal 1 ', 2 ' pin is respectively applied for and the late-class circuit that internally connects in the power circuit provides positive and negative electrode output.
Adopt the above-mentioned connected mode of three core connectors, have following three kinds of effects:
First kind: when operating personnel used three core connectors to be connected with the externally fed power supply, if 3 unsettled pin have connected the external power source positive pole, 2 pin connect the external power source negative pole, and were unsettled because of 3 pin, then do not have the power supply input; Oppositely connect if two core connectors are then inevitable, when oppositely connecting, late-class circuit is not worked.
Second kind: when damaging for one in three core connector input end 1 pin or 2 pin, use 3 pin to replace: damage such as 1 pin, 3 pin connect the externally fed positive source, 2 pin connect the externally fed power cathode, its output terminal need be adjusted, and 3 ' pin is used for output cathode, 2 ' pin output negative pole; If 2 pin damage, 3 pin connect the externally fed power cathode, and 1 pin still connects the positive pole of externally fed power supply, after its output terminal is adjusted, and 1 ' pin output cathode, 3 ' pin output negative pole, the connector that need not more renew improves service efficiency.
Fig. 3 is the another kind of connection diagram that is connected to the connector of externally fed power supply, 1 pin of the input end plug portion of three core connectors and 2 pin are connected the positive pole and the negative pole of external power source respectively, 3 pin are unsettled, 1 ' pin of output terminal socket part and 3 ' pin serial connection, the late-class circuit both positive and negative polarity is connected on 1 ', the 2 ' pin and is connected on 3 ', the 2 ' pin can both normal power supply, improves the accuracy of pegging graft.
Claims (4)
1, a kind of visiometer, its power circuit comprise the externally fed power supply and in connect power circuit, in connect the connector that is used to connect the externally fed power supply in the power circuit, insurance device and lightning protection component and be connected in series in turn, it is characterized in that: all be serially connected with a pressure-sensitive device between the earth terminal of lightning protection component and the ground.
2, visiometer as claimed in claim 1 is characterized in that: described pressure-sensitive device is a voltage dependent resistor (VDR).
3, visiometer as claimed in claim 1 or 2, it is characterized in that: described connector is three core connectors, have three independently input ends, and with respective input three output terminals one to one respectively, wherein two input ends are respectively applied for positive pole, the negative pole that connects the externally fed power supply, and another input end is unsettled.
4, visiometer as claimed in claim 3, it is characterized in that: described three core connectors, wherein, a corresponding output terminal with two input ends of the positive pole that is used for connecing respectively the externally fed power supply, negative pole, and the output terminal corresponding with unsettled input end, the late-class circuit that described two output terminals serial connection back contact and another output terminal are used for internally connecing power circuit provides both positive and negative polarity to export.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007203104402U CN201152871Y (en) | 2007-12-11 | 2007-12-11 | Visibility instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007203104402U CN201152871Y (en) | 2007-12-11 | 2007-12-11 | Visibility instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201152871Y true CN201152871Y (en) | 2008-11-19 |
Family
ID=40128550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007203104402U Expired - Fee Related CN201152871Y (en) | 2007-12-11 | 2007-12-11 | Visibility instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201152871Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102854138A (en) * | 2012-03-23 | 2013-01-02 | 中国气象局北京城市气象研究所 | Visibility measuring system and method based on digital camera shooting method |
-
2007
- 2007-12-11 CN CNU2007203104402U patent/CN201152871Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102854138A (en) * | 2012-03-23 | 2013-01-02 | 中国气象局北京城市气象研究所 | Visibility measuring system and method based on digital camera shooting method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201797312U (en) | Network port circuit of Ethernet power supply device | |
| CN202662941U (en) | USB patch cord | |
| CN201898656U (en) | Protective circuit of waterlogged mobile terminal circuit board and mobile terminal | |
| CN201699254U (en) | Protective socket for lightning-protection and overvoltage-protection | |
| CN201152871Y (en) | Visibility instrument | |
| CN201690091U (en) | Lightning-protection filter adapter | |
| CN207320853U (en) | A kind of current foldback circuits of PPTC in charging and discharging lithium battery circuit | |
| CN204794065U (en) | Electric leakage circuit breaker thunderbolt surge protection circuit | |
| CN209641973U (en) | A kind of MCU single-chip microcontroller control can show the data line of voltage and current | |
| CN209517056U (en) | A kind of photovoltaic wire box and a kind of photovoltaic module | |
| CN208522461U (en) | A kind of USB electrostatic interface protection circuit | |
| CN106549272A (en) | A kind of automotive connector and its short-circuit detecting device | |
| CN201859998U (en) | Multifunctional protection energy-saving computer socket | |
| CN207321772U (en) | A kind of electronic information suppressor | |
| CN205584004U (en) | Power switching circuit and power supply system | |
| CN208241297U (en) | A kind of MCU protection circuit and the electronic cigarette comprising the protection circuit | |
| CN214176896U (en) | Inverter impact short circuit distinguishing protection circuit | |
| CN202282611U (en) | Surge protection device | |
| CN114744602B (en) | Protection circuit and terminal equipment | |
| CN217087764U (en) | Anti-interference power supply | |
| CN209592968U (en) | The short-circuit protection circuit of power supply output | |
| CN212435359U (en) | Power supply protection circuit of virtual simulation equipment | |
| CN104345855B (en) | Current-limiting circuit for USB interface | |
| CN217406174U (en) | Overpower protection circuit of LED driving power supply | |
| CN202949096U (en) | Power socket with overvoltage protection function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: CAMA (LUOYANG) ENVIRONMENTAL MEASUREMENT CO., LTD. Free format text: FORMER OWNER: CAMA (LUOYANG) MEASUREMENT + CONTROLS CO., LTD. Effective date: 20120613 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 471009 LUOYANG, HENAN PROVINCE TO: 471000 LUOYANG, HENAN PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20120613 Address after: 471000 No. 80, South South Road, Luoyang hi tech Development Zone, Henan Patentee after: Kaimai (Luoyang) limited measuring ring Address before: 471009 No. 89 Jiefang South Road, Henan, Luoyang Patentee before: CAMA (Luoyang) Measurements & Controls Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081119 Termination date: 20141211 |
|
| EXPY | Termination of patent right or utility model |