CN201104260Y - Device for monitoring equipment with current - Google Patents
Device for monitoring equipment with current Download PDFInfo
- Publication number
- CN201104260Y CN201104260Y CNU2007200604153U CN200720060415U CN201104260Y CN 201104260 Y CN201104260 Y CN 201104260Y CN U2007200604153 U CNU2007200604153 U CN U2007200604153U CN 200720060415 U CN200720060415 U CN 200720060415U CN 201104260 Y CN201104260 Y CN 201104260Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- current
- equipment
- monitored
- electric current
- 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 - Lifetime
Links
Images
Landscapes
- Measurement Of Current Or Voltage (AREA)
Abstract
The utility model relates to a device for monitoring the electric current of tested equipment, comprising a power supply circuit, an AC mutual inductor, a rectifier-filter circuit, a comparator, a current value option circuit, a feedback control circuit and a feedback load, wherein, the AC mutual inductor receives the sensing current from the tested equipment; the sensing current is inputted into the comparator through the rectifier-filter circuit; the current value option circuit provides a plurality of comparison currents of optional values for the comparator; an output terminal of the comparator is connected with an input terminal of the feedback control circuit; an output control terminal of the feedback control circuit is connected with the feedback load. According to the size of the current of the monitored target, the utility model effectively monitors the working situation of the equipment, has reasonable and simple structure and low production cost and operation cost, can be applicable to the equipment with certain current value, in particular to the equipment which operates for a long time, adopts a buzzer or an indicator light to realize the remote monitoring, saves labor and is safe and reliable.
Description
Technical field
The utility model relates to the electrical field, relates in particular to the device that the equipment that certain electric current is arranged is monitored.
Background technology
In the research and development and production run of air conditioner, to experience the step of operation of air conditioner experiment usually.When the air-conditioning long-time running was tested, the unit operation environment was abominable, and environment temperature is up to more than 55 ℃, and present checkout equipment is subjected to space constraint very much, made the laboratory technician must finish experiment in the laboratory and detect that this is a test to the laboratory technician.In addition, the detection signal of at present a lot of air conditioning labors has only the vision transmission, do not have transmission sound, and laboratory technician's vision is often limited, and the quality of unit operation, whether normal judgement will be restricted.For example: two experiment tablees are with a computer monitor, and unit various protection shutdown or cancel closedown occur often in the development phase, and the experimental period cycle is very long again, many times can not find tested machine cancel closedown the very first time.For air-conditioning defrost experiment, the uncertainty of unit defrost time has increased the accurately difficulty of the tested machine defrost of discovery of laboratory technician, is unfavorable for the judgement of experimental result.
How changing laboratory technician's condition of work, is the object that we study.Wherein environment temperature we be difficult to change (the experiment condition decision), have only and find new detection method just can better alleviate laboratory technician's burden.So it is extremely urgent to develop a kind of device of automatically equipment that certain electric current is arranged being monitored.
The utility model content
The purpose of this utility model is the defective at prior art, and a kind of device that the equipment that certain electric current is arranged is monitored is provided.The purpose of this utility model is realized by following technical scheme:
A kind of device that the equipment that certain electric current is arranged is monitored, comprise power circuit, D.C mutual-inductor, current rectifying and wave filtering circuit, comparer, current value is selected circuit, feedback control circuit and feedback load, it is characterized in that, power circuit is converted to stable DC power supply with AC power supplies, be comparer, current value selects circuit and feedback control circuit that dc supply is provided, one end of current transformer obtains current sensor from equipment under test, the other end connects the input end of current rectifying and wave filtering circuit, the output terminal of current rectifying and wave filtering circuit connects an input end of comparer, current value selects circuit that the electric current input of a plurality of optional values is provided for another input end of comparer, the output terminal of comparer connects the input end of feedback control circuit, and the output control terminal of feedback control circuit connects feedback load.
The utility model is implemented effective monitoring according to monitored size to image current to working condition.The utility model is simple and reasonable, making and operating cost are all very cheap, can use the equipment that certain current value is arranged is even, to the equipment of long-time running, feedback load can adopt hummer and pilot lamp to carry out remote monitor especially, saves manpower and safe and reliable.To a plurality of monitored object, can make monitor supervision platform, equipment operation is implemented overall assurance, this device can reach the early warning effect equally without valuable utility appliance such as displays.
Description of drawings
Fig. 1 is the total circuit theory diagrams of the utility model;
Fig. 2 is the enlarged drawing of power circuit among Fig. 1;
Fig. 3 is the enlarged drawing of D.C mutual-inductor circuit among Fig. 1;
Fig. 4 is the enlarged drawing of current rectifying and wave filtering circuit among Fig. 1;
Fig. 5 is the enlarged drawing of comparer part among Fig. 1;
Fig. 6 is the enlarged drawing that current value is selected circuit among Fig. 1;
Fig. 7 is the enlarged drawing of feedback control circuit among Fig. 1;
Fig. 8 is the enlarged drawing of buzzer circuit among Fig. 1;
Fig. 9 is the enlarged drawing of indicator light circuit among Fig. 1.
Embodiment
As shown in Figure 1, and please in conjunction with consulting Fig. 2 to Fig. 8, present embodiment provides a kind of device that the equipment that certain electric current is arranged is monitored, and this device comprises power circuit, D.C mutual-inductor, current rectifying and wave filtering circuit, comparer, current value selection circuit, feedback control circuit, feedback load.
As shown in Figure 2, power circuit receives the AC12V power supply from transformer terminal, after bridge rectifier, filtering, input to the three-terminal voltage-stabilizing chip, three-terminal voltage-stabilizing chip output DC12V power supply, just obtain stabilized power source by filtering again, provide dc supply thereby select circuit and feedback control circuit for comparer, current value.
Please in conjunction with consulting Fig. 3 and Fig. 4, current transformer is monitored the unit of equipment under test as sensor, the current conditions when obtaining unit operation.Current transformer one end obtains current sensor from equipment under test, and the other end connects the input end of current rectifying and wave filtering circuit.
It is more convenient for current transformer is used, this device is provided with current transformer and the detachable design of circuit master control board especially, as shown in the figure, the circuit master control borad is provided with a four-core needle stand, also be provided with a four-core needle stand on the current transformer plate, current transformer is connected by the input end of the current rectifying and wave filtering circuit on these two four-core needle stands and connection and the circuit master control borad, the user can increase the length of connection according to actual needs like this, perhaps increase needle stand, because it is not too high that accuracy of detection requires, the loss that increase connection length is brought can be ignored.After the current rectifying and wave filtering circuit electric current that detection obtains to current transformer carries out half-wave rectification, filtering, export to an input end of comparer, wherein, between the described input end of current rectifying and wave filtering circuit and comparer the bleeder circuit (combining Fig. 5) that is formed by resistance R 3 and R4 is set also.
As shown in Figure 6, current value selects circuit to be used to another input end of comparer that the electric current input (in conjunction with Fig. 5) of a plurality of optional values is provided, current value in the present embodiment selects circuit to be made of two three toggle switchs, five fixed resistances of control and an adjustable resistance, and selects circuit to form a bleeder circuit by resistance R 5 and this current value.Certainly, current value selects circuit also can be realized by single adjustable resistor.Current value selects circuit by changing the electric current fiducial value of comparator circuit, can monitor the electric current of plurality of devices, also can monitor the electric current of an equipment when a plurality of duty, for example, can adapt to the current monitoring of air conditioner when following each situation: compressor start (big electric current), feedback circuit disconnects (closing), compressor does not start (little electric current), feedback circuit closure (disconnection).
Present embodiment adopts two three toggle switchs, and S1-1, S1-2, S1-3, S2-1, S2-2, S3-3 select to set size of current, and every dial-up is represented an electric current fiducial value.Illustrate using method below: the single-phase current transformer that passes of power lead (live wire), dial fiducial value as required, if monitored unit electric current please be selected S2-3 more than 0.5A, if the unit working current more than 1A, please select S2-(3,2) any, if the unit working current more than 2.5A, please select S2 any; If the unit working current please be selected S2 any or S1-3 more than 3A, if the unit working current more than 4A, please select S2 any or S1-(3,2) any, if the unit working current not in the fixed resistance range of set value, can be selected by adjustable resistance R13.For those of ordinary skills, increasing adjustable resistance just can make the laboratory technician freely select setting value as required.
In conjunction with Fig. 1 and shown in Figure 7, the output terminal of comparer connects the input end of feedback control circuit, this feedback control circuit comprises the two-way control circuit, this two-way control circuit is controlled by triode, and form interlock circuit each other, when being the needle stand CN3 unlatching of Q1 control, the needle stand CN4 of Q2 control closes; When the needle stand CN3 of Q1 control in like manner turn-offed, the needle stand CN4 of Q2 control opened.CN3, CN4 are respectively applied for the connection feedback load, as hummer and pilot lamp (in conjunction with Fig. 8 and Fig. 9).In the monitor procedure, handle out height electricity signal frequently, control the keying of two triodes more respectively, and then control the hummer of two two core needle stand CN3, CN4 ends connection and the keying of pilot lamp by comparer.Select according to user's custom or physical condition then, feedback load work when being equipment operation, feedback load work when still equipment stops, or operation and stop two kinds of feedbacks and show simultaneously, can increase the length of feedback circuit after choosing, implement remote monitor, avoid the equipment work environment abominable, or operation supervise and control personnel work place and equipment is not in the restriction in same place.
This device adopts light current Control and Feedback circuit (hummer and pilot lamp), and safer like this, also need not increases power supply separately, if only adopt wherein one tunnel among Fig. 7, promptly saves electricity, also can reduce the load of this device, increases the service life.
Claims (10)
1. device that the equipment that certain electric current is arranged is monitored, comprise power circuit, D.C mutual-inductor, current rectifying and wave filtering circuit, comparer, current value is selected circuit, feedback control circuit and feedback load, it is characterized in that, power circuit is converted to stable DC power supply with AC power supplies, be comparer, current value selects circuit and feedback control circuit that dc supply is provided, one end of current transformer obtains current sensor from equipment under test, the other end connects the input end of current rectifying and wave filtering circuit, the output terminal of current rectifying and wave filtering circuit connects an input end of comparer, current value selects circuit that the electric current input of a plurality of optional values is provided for another input end of comparer, the output terminal of comparer connects the input end of feedback control circuit, and the output control terminal of feedback control circuit connects feedback load.
2. the device that the equipment that certain electric current is arranged is monitored as claimed in claim 1 is characterized in that, described feedback load is a kind of in hummer and the pilot lamp or both combinations.
3. the device that the equipment that certain electric current is arranged is monitored as claimed in claim 1 is characterized in that, described current transformer is connected with the input end of current rectifying and wave filtering circuit by at least two four-core needle stands and connection.
4. the device that the equipment that certain electric current is arranged is monitored as claimed in claim 1 is characterized in that, described current value selects circuit to be realized by an adjustable resistor.
5. the device that the equipment that certain electric current is arranged is monitored as claimed in claim 1 is characterized in that, described current value selects circuit to be made of the plurality of fixed resistance and the adjustable resistance of some toggle switch Parallel Control.
6. the device that the equipment that certain electric current is arranged is monitored as claimed in claim 5 is characterized in that, also comprises a divider resistance R5, and resistance R 5 selects circuit to form a bleeder circuit with described current value.
7. the device that the equipment that certain electric current is arranged is monitored as claimed in claim 1 is characterized in that, between the described input end of described current rectifying and wave filtering circuit and comparer the bleeder circuit that is formed by resistance R 3 and R4 is set also.
8. the device that the equipment that certain electric current is arranged is monitored as claimed in claim 1 is characterized in that, the output control terminal of feedback control circuit connects feedback load by at least two two core needle stands and connecting line.
9. the device that the equipment that certain electric current is arranged is monitored as claimed in claim 1 is characterized in that, described feedback control circuit comprises the interlock circuit that two-way is controlled by triode respectively, controls one road feedback load respectively.
10. the device to there being certain current flow devices to monitor as claimed in claim 1 is characterized in that, described feedback control circuit comprises the circuit of route triode control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200604153U CN201104260Y (en) | 2007-11-30 | 2007-11-30 | Device for monitoring equipment with current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200604153U CN201104260Y (en) | 2007-11-30 | 2007-11-30 | Device for monitoring equipment with current |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201104260Y true CN201104260Y (en) | 2008-08-20 |
Family
ID=39951292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200604153U Expired - Lifetime CN201104260Y (en) | 2007-11-30 | 2007-11-30 | Device for monitoring equipment with current |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201104260Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103022960A (en) * | 2012-11-03 | 2013-04-03 | 介国安 | Split-type three-phase current mutual inductor interchange circuit |
| CN103971911A (en) * | 2014-01-23 | 2014-08-06 | 瑞安市工泰电器有限公司 | Coarse registration and fine adjustment type universal interconvertible three-phase current mutual inductor |
| CN109059300A (en) * | 2018-06-01 | 2018-12-21 | 珠海格力电器股份有限公司 | Heat pump water-heating machine and its controller and detection method |
-
2007
- 2007-11-30 CN CNU2007200604153U patent/CN201104260Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103022960A (en) * | 2012-11-03 | 2013-04-03 | 介国安 | Split-type three-phase current mutual inductor interchange circuit |
| CN103022960B (en) * | 2012-11-03 | 2015-08-26 | 介国安 | Split-type three-phase current mutual inductor interchange circuit |
| CN103971911A (en) * | 2014-01-23 | 2014-08-06 | 瑞安市工泰电器有限公司 | Coarse registration and fine adjustment type universal interconvertible three-phase current mutual inductor |
| CN103971911B (en) * | 2014-01-23 | 2016-08-17 | 瑞安市工泰电器有限公司 | Slightly join fine tuning formula universal interchangeable threephase current transformer |
| CN109059300A (en) * | 2018-06-01 | 2018-12-21 | 珠海格力电器股份有限公司 | Heat pump water-heating machine and its controller and detection method |
| CN109059300B (en) * | 2018-06-01 | 2020-07-17 | 珠海格力电器股份有限公司 | Heat pump water heater and controller and detection method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103713238B (en) | The double-colored trouble indicator that warning current value can be established | |
| CN104502763B (en) | Electric-controlled plate automatic checkout equipment | |
| CN201104260Y (en) | Device for monitoring equipment with current | |
| CN208623045U (en) | Monitor the intelligent socket of electrical equipment in real time | |
| CN102707751B (en) | Temperature and humidity intelligent monitoring system of standardized security apparatus storeroom for electrified operation | |
| CN203398043U (en) | Low-voltage breaker with connecting terminal block temperature rise monitoring device | |
| CN105353323A (en) | Detection apparatus, and fan detection system and method | |
| CN205882678U (en) | High -power DCDC converter protection device | |
| CN103454508B (en) | Four-way over-current over-voltage protection tester | |
| CN207473055U (en) | A kind of relay intelligent test device | |
| CN201707576U (en) | Intelligent control system of industrial temperature control equipment | |
| CN207123611U (en) | Fire-fighting equipment power supply monitoring system comprehensive automation detecting system | |
| CN202003018U (en) | Load device for switch power supply load debugging for air conditioner controller | |
| CN202815644U (en) | High-power full-automatic intelligent alternative current (AC) voltage stabilized power supply | |
| CN205581677U (en) | High tension switchgear's dimension accuse device | |
| CN205017102U (en) | Power consumption distribution intelligent monitoring subassembly | |
| CN210626962U (en) | Remote monitoring system for running state of electric equipment | |
| CN205067589U (en) | Cubical switchboard thermote | |
| CN102148488B (en) | Circuit device | |
| CN204101654U (en) | Electric heater detects frock | |
| CN103698027A (en) | Temperature indication circuit and electronic product | |
| CN202305689U (en) | Multiway heating wire detection circuit and refrigerator provided with same | |
| CN210244186U (en) | Novel intelligent power supply time sequence control circuit | |
| CN211554130U (en) | Intelligent safety power consumption monitoring device based on NB-IOT | |
| CN207557722U (en) | A kind of control panel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080820 |