CN202886498U - Load broken line detector - Google Patents
Load broken line detector Download PDFInfo
- Publication number
- CN202886498U CN202886498U CN 201220538518 CN201220538518U CN202886498U CN 202886498 U CN202886498 U CN 202886498U CN 201220538518 CN201220538518 CN 201220538518 CN 201220538518 U CN201220538518 U CN 201220538518U CN 202886498 U CN202886498 U CN 202886498U
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- Prior art keywords
- load
- sampling circuit
- current sampling
- thread break
- output terminal
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Abstract
The utility model provides a load broken line detector which comprises a current sampling circuit used for detecting the load current. The load broken line detector is characterized in that the output end of the current sampling circuit is connected with the input end of a comparator; the output end of the comparator is connected with the input end of a central processor; and the output end of the central processor outputs a control signal. According to the load broken line detector arranged in the comparator, the sampling value of the current sampling circuit is compared with a reference value, the comparison result is transmitted to the central processor, the central processor transmits a control command to an execution unit according to the comparison result, manual lookup is not required, the labor force is saved, the detection and the monitoring can be performed at any time, the detection blind area is eliminated, and the safety of the system is improved.
Description
Technical field
The utility model relates to detecting device, specifically, relates in particular to a kind of load thread break detector.
Background technology
In the existing load thread break detector, as shown in Figure 1, usually send control command by central processing unit to the performance element that is connected with load, performance element is generally relay or contactor, the control command that central processing unit sends is applied to performance element, thus the access of control load or cut-out.Simultaneously, in order to understand the working condition of load, usually between performance element and load, be provided for the reometer A of sensing lead electric current, indicate the working condition of load by the testing result of observing reometer A.But, indicate the loaded work piece situation by reometer A, need the special messenger to check each reometer, take the labour, and by artificial inspection, the blind area of patrolling may occur, can not monitor the working condition of load constantly.
The utility model content
The purpose of this utility model is for the problems referred to above, and a kind of load thread break detector is provided, and has saved the labour, has realized the constantly monitoring to load, has eliminated the detection blind area, has improved security of system.
For achieving the above object, the utility model has adopted following technical proposal: a kind of load thread break detector is provided, comprise the current sampling circuit for detection of load current, wherein, described current sampling circuit output terminal connects the input end of comparer, the output terminal of described comparer connects the input end of central processing unit, the output terminal output control signal of described central processing unit.
Above-mentioned load thread break detector, wherein, described current sampling circuit is current transformer.
Above-mentioned load thread break detector, wherein, described comparer comprises triode Q1, the base stage of this triode Q1 connects the output of current sampling circuit, emitter connects public terminal GND, collector is connected with resistance R through the resistance R 1 of mutually series connection and is connected power Vcc, and draws comparator output terminal between resistance R 1 and the resistance R 2.
Above-mentioned load thread break detector, wherein, the output terminal of described central processing unit also connects display.
Above-mentioned load thread break detector, wherein, described display is LCDs.
Compared with prior art, the utility model has the advantage of: the load thread break detector that the utility model provides, by being arranged in the comparer with the sampled value of current sampling circuit and reference value relatively, and comparative result sent to central processing unit, central processing unit sends control command according to comparative result to performance element, does not need manually to check, saved the labour, and can detect constantly monitoring, eliminate the detection blind area, improve security of system.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of existing load thread break detector;
Fig. 2 is the structured flowchart of the utility model load thread break detector;
Fig. 3 is the circuit diagram of comparer among Fig. 1.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
As shown in Figure 2, the load thread break detector that the utility model provides, comprise the current sampling circuit 4 for detection of load 3 electric currents, wherein, described current sampling circuit 4 output terminals connect the input end of comparer 5, the output terminal of described comparer 5 connects the input end of central processing unit 1, the output terminal of described central processing unit 1 is to the performance element output control signal that is connected with load, so, central processing unit 1 just can be known the duty of load 3 according to the output end signal of comparer 5, when load 3 was broken down, central processing unit 1 sent control signal to performance element 2, and the load 3 that is connected with performance element 2 is cut off.In addition, the output terminal of described central processing unit 1 also connects display 6, when load 3 is broken down, can display alarm cue on display 6, and described display 6 can be LCDs.
As shown in Figure 3, described current sampling circuit 4 is current transformer, described comparer 4 comprises triode Q1, the base stage of this triode Q1 connects the output terminals A of current sampling circuit 4 behind resistance R 1, diode D, and through resistance R 2 connection public terminal GND, and be connected electric capacity between diode D negative electrode (be B end) and the common port, emitter connects public terminal GND, collector connects power Vcc through resistance R 3, and draw the output terminal C of comparer 4 at collector, thereby the signal of comparer 4 output terminal C changes with the sampled signal on the output terminals A of current sampling circuit 4.
In sum, the load thread break detector that the utility model provides, compare by being arranged on comparer 5 interior sampled value and reference values with current sampling circuit 4, and comparative result sent to central processing unit 1, central processing unit 1 sends control command according to comparative result to performance element 2, does not need manually to check, saved the labour, and can detect constantly monitoring, eliminate the detection blind area, improve security of system.
The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (5)
1. load thread break detector, comprise the current sampling circuit for detection of load current, it is characterized in that, described current sampling circuit output terminal connects the input end of comparer, the output terminal of described comparer connects the input end of central processing unit, the output terminal output control signal of described central processing unit.
2. load thread break detector according to claim 1 is characterized in that, described current sampling circuit is current transformer.
3. load thread break detector according to claim 1, it is characterized in that, described comparer comprises triode Q1, the base stage of this triode Q1 connects the output of current sampling circuit, emitter connects public terminal GND, collector is connected with resistance R through the resistance R 1 of mutually series connection and is connected power Vcc, and draws comparator output terminal between resistance R 1 and the resistance R 2.
4. load thread break detector according to claim 1 is characterized in that, the output terminal of described central processing unit also connects display.
5. load thread break detector according to claim 1 is characterized in that, described display is LCDs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220538518 CN202886498U (en) | 2012-10-19 | 2012-10-19 | Load broken line detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220538518 CN202886498U (en) | 2012-10-19 | 2012-10-19 | Load broken line detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202886498U true CN202886498U (en) | 2013-04-17 |
Family
ID=48077909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220538518 Expired - Fee Related CN202886498U (en) | 2012-10-19 | 2012-10-19 | Load broken line detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202886498U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103332187A (en) * | 2013-07-04 | 2013-10-02 | 南车株洲电力机车有限公司 | System and method for monitoring electric pneumatic breaking |
| CN106053920A (en) * | 2016-07-20 | 2016-10-26 | 浙江大华技术股份有限公司 | Load loss detection circuit and power supply system |
| CN107727992A (en) * | 2017-11-06 | 2018-02-23 | 李娟� | A kind of load circuit and its wire break detection method |
| CN106053920B (en) * | 2016-07-20 | 2019-07-16 | 浙江大华技术股份有限公司 | A kind of load missing detecting circuit and power supply system |
-
2012
- 2012-10-19 CN CN 201220538518 patent/CN202886498U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103332187A (en) * | 2013-07-04 | 2013-10-02 | 南车株洲电力机车有限公司 | System and method for monitoring electric pneumatic breaking |
| CN103332187B (en) * | 2013-07-04 | 2016-07-27 | 南车株洲电力机车有限公司 | A kind of monitoring system and method for electric pneumatic breaking |
| CN106053920A (en) * | 2016-07-20 | 2016-10-26 | 浙江大华技术股份有限公司 | Load loss detection circuit and power supply system |
| CN106053920B (en) * | 2016-07-20 | 2019-07-16 | 浙江大华技术股份有限公司 | A kind of load missing detecting circuit and power supply system |
| CN107727992A (en) * | 2017-11-06 | 2018-02-23 | 李娟� | A kind of load circuit and its wire break detection method |
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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: 20130417 Termination date: 20151019 |
|
| EXPY | Termination of patent right or utility model |