CN206930705U - A kind of band-type brake current detection circuit - Google Patents
A kind of band-type brake current detection circuit Download PDFInfo
- Publication number
- CN206930705U CN206930705U CN201720916767.8U CN201720916767U CN206930705U CN 206930705 U CN206930705 U CN 206930705U CN 201720916767 U CN201720916767 U CN 201720916767U CN 206930705 U CN206930705 U CN 206930705U
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- Prior art keywords
- comparator
- current
- lamp module
- band
- display lamp
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- Cage And Drive Apparatuses For Elevators (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
- Elevator Control (AREA)
Abstract
The utility model discloses a kind of elevator internal contracting brake source current to detect circuit, including comparator, detection current element, rheostat and display lamp module, and detection current element is used to detect the electric current of band-type brake power supply to be detected and exports corresponding voltage；The voltage output end of the detection current element is connected to the positive input terminal of comparator, and the negative input end of the comparator is connected to the rheostat；The output end of the comparator is then connected to the display lamp module.When the utility model detects electric current, current value can be accurately measured, it is not necessary to which excessively troublesome artificial unloading's measurement, which saves many times；Also supervisor's time update mistake can be reminded by showing lamp module, ensure that security.
Description
Technical field
It the utility model is related to electronic technology field, and in particular to a kind of band-type brake current detection circuit.
Background technology
Band-type brake power supply generally use addition protective tube is protected to protect band-type brake power circuit in the prior art, but can not
Current fluctuation scope in elevator operation is specified, this is fatal for lift boy, therefore it is to embrace to add band-type brake current detecting
Lock part essential in elevator operation.
Utility model content
In view of the shortcomings of the prior art, the utility model aims to provide a kind of band-type brake current detection circuit, it is not necessary to artificial
Dismounting can accurately measures current value.
To achieve these goals, the utility model adopts the following technical scheme that：
A kind of elevator internal contracting brake source current detects circuit, including comparator, detection current element, rheostat and display lamp mould
Block, detection current element are used to detect the electric current of band-type brake power supply to be detected and export corresponding voltage；The detection current elements
The voltage output end of part is connected to the positive input terminal of comparator, and the negative input end of the comparator is connected to the rheostat；Institute
The output end for stating comparator is then connected to the display lamp module.
Further, the display lamp module is red light emitting diodes.
Further, the rheostat is connected to another display lamp module.Further, another display lamp module
For green LED.
Further, the detection current element uses WCS1800 current inductors, inputs the electricity of band-type brake power supply to be detected
Source line penetrates the IP current channels of the WCS1800 current inductors.
Further, the output end of the comparator is also attached to the I/O interfaces of a main processor modules.Further
Ground, the main processor modules are STM8S003F3.
The beneficial effects of the utility model are：The utility model flows through detection current element simultaneously by band-type brake source current
Output voltage, positive input terminal of this output voltage to comparator, then by the rheostat on the negative input end of comparator come
Adjusting resistance value and set reference voltage, comparator by compare positive-negative input end voltage size and determine export high level
Or low level, by expression of the light on and off of display lamp module as result of determination.When detecting electric current, electric current can be accurately measured
Value, it is not necessary to which excessively troublesome artificial unloading's measurement, which saves many times；Also prison can be reminded by showing lamp module
Control person's time update mistake, ensure that security.
Brief description of the drawings
Fig. 1 is that band-type brake of the present utility model detects current circuit schematic diagram.
Fig. 2 is main processor modules of the present utility model.
Embodiment
Below with reference to accompanying drawing, the utility model will be further described, it is necessary to which explanation, following examples are with this
Premised on technical scheme, detailed embodiment and specific operating process are given, but the scope of the utility model and unlimited
In the present embodiment.
As shown in Figure 1-2, a kind of elevator internal contracting brake source current detection circuit, including comparator LM358, detection current element
WCS1800 current inductors, rheostat R1 and display lamp module LED2.
Detection current element WCS1800 current inductors are used for the electric current for detecting band-type brake power supply to be detected and exported corresponding
Voltage, in the present embodiment, the input port of band-type brake power supply to be detected uses 4P band-type brakes power input terminal (P2), by will even
The IP current channels that the power line of the input port of reception detection band-type brake power supply penetrates the WCS1800 current inductors realize electric current
Sensing.The voltage output end of the detection current element WCS1800 current inductors is connected to the positive input terminal of comparator.
The negative input end of the comparator LM358 is connected to the rheostat R1；The output end of the comparator LM358 is then
It is connected to the display lamp module LED2 (red light emitting diodes).The negative input end of the comparator LM358 is also attached to one
Grounding resistance R2 (470 ohm), the display lamp module LED2 are series at another grounding resistance R3 (470 ohm).In this implementation
In example, the rheostat R1 is 1K.In addition, in the present embodiment, the power supply of the elevator internal contracting brake source current detection circuit by
2P terminals provide chip power.
The operation principle of the elevator internal contracting brake source current detection circuit is：
Detect on circuit after electricity, start band-type brake, band-type brake source current flows through detection current element WCS1800 electric current sensings
Device, detection current element WCS1800 current inductors sense after electric current by voltage output end export corresponding voltage to than
Compared with device LM358 positive input terminal.In addition, reference voltage is determined by rheostat R1 resistance regulation and inputted to comparator
LM358 negative input end.Comparator LM358 determines output high level by comparing the voltage swing of positive input terminal and negative input end
Or low level, so as to drive display lamp module LED2 light on and off, to show whether current band-type brake source current is normal.When normal
When, electric current exports low level without departing from normal working voltage, then comparator LM358, and display lamp module LED2 goes out.When abnormal
When, electric current exceeds normal working voltage, then comparator LM358 exports high level, and display lamp module LED2 is lighted, and prompts to remind prison
Control person's time update mistake.
Further, the rheostat R1 is connected to another display lamp module LED1 (green LED).By this
Green LED, rheostat R1 change in resistance process can be shown.Green LED from bright dimmed process just
It is that rheostatic resistance becomes big process from small.
Further, the output end of the comparator LM358 is also attached to the I/O of the main processor modules described in Fig. 2 and connect
Mouthful.Further, the main processor modules are STM8S003F3.By setting main processor modules, primary processor mould is made
Block control connection band-type brake, can be controlled processing to band-type brake when band-type brake source current exceeds normal working voltage.Output is high
During level, electric current exceedes normal working voltage, and main processor modules make the processing that control band-type brake is held tightly；When exporting low level,
Electric current is not above normal working voltage, then main processor modules make the processing that control band-type brake opens maintenance.
The structure design of whole elevator internal contracting brake source current detection circuit is simple, and cost price is relatively low, and detection and control are embraced
Lock effect is preferable, and need not excessively troublesome artificial unloading's measurement while accurately can measure current value.
For those skilled in the art, technical scheme that can be more than and design, provide various corresponding
Change and deformation, and all these change and deformation, should be construed as being included in the utility model claims protection domain it
It is interior.
Claims (7)
1. a kind of elevator internal contracting brake source current detects circuit, it is characterised in that including comparator, detection current element, rheostat
With display lamp module, detection current element is used to detect the electric current of band-type brake power supply to be detected and exports corresponding voltage；It is described
The voltage output end of detection current element is connected to the positive input terminal of comparator, and the negative input end of the comparator is connected to described
Rheostat；The output end of the comparator is then connected to the display lamp module.
2. elevator internal contracting brake source current according to claim 1 detects circuit, it is characterised in that described to show that lamp module is
Red light emitting diodes.
3. elevator internal contracting brake source current according to claim 1 detects circuit, it is characterised in that the rheostat is connected to
Another display lamp module.
4. elevator internal contracting brake source current according to claim 3 detects circuit, it is characterised in that another display lamp mould
Block is green LED.
5. elevator internal contracting brake source current according to claim 1 detects circuit, it is characterised in that the detection current element
Using WCS1800 current inductors, the power line for inputting band-type brake power supply to be detected penetrates the IP of the WCS1800 current inductors
Current channel.
6. elevator internal contracting brake source current according to claim 1 detects circuit, it is characterised in that the output of the comparator
End is also attached to the I/O interfaces of a main processor modules.
7. elevator internal contracting brake source current according to claim 6 detects circuit, it is characterised in that the main processor modules
For STM8S003F3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720916767.8U CN206930705U (en) | 2017-07-26 | 2017-07-26 | A kind of band-type brake current detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720916767.8U CN206930705U (en) | 2017-07-26 | 2017-07-26 | A kind of band-type brake current detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206930705U true CN206930705U (en) | 2018-01-26 |
Family
ID=61355342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720916767.8U Active CN206930705U (en) | 2017-07-26 | 2017-07-26 | A kind of band-type brake current detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206930705U (en) |
-
2017
- 2017-07-26 CN CN201720916767.8U patent/CN206930705U/en active Active
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