CN204314415U - A kind of electrical heating wire broken thread detector - Google Patents
A kind of electrical heating wire broken thread detector Download PDFInfo
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- CN204314415U CN204314415U CN201520007425.5U CN201520007425U CN204314415U CN 204314415 U CN204314415 U CN 204314415U CN 201520007425 U CN201520007425 U CN 201520007425U CN 204314415 U CN204314415 U CN 204314415U
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- heating wire
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- thread detector
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Abstract
The utility model discloses a kind of electrical heating wire broken thread detector, comprising: heating unit, and each electrical heating wire in parallel in heating unit is divided into N group electrical heating wire group, arbitrary electrical heating wire group and AC power and phase shift block form series circuit; And the electric current of each electrical heating wire group inputs to MCU module respectively by after corresponding detecting unit collection; Detecting unit comprises: the current transformer being suitable for the electric current detecting electrical heating wire group, the amplification module be connected with current transformer, and the A/D module be connected with this amplification module, and A/D module is connected with MCU module; Meanwhile, mutually compare the N group heater strip load current change detected, electric current can be judged to make in heater strip group whether abnormal, to judge whether heating circuit is short-circuited or open circuit, comprise electrical heating wire and whether phase shift block open circuit or short circuit occur.
Description
Technical field
The utility model relates to a kind of temperature control field, particularly relates to a kind of electrical heating wire broken thread detector.
Background technology
Temperature control field realizes heating often by electrical heating wire, and electrical heating wire needs to carry out cooperating with phase shift block, but because electrical heating wire often adopts many parallel connections to realize heating, and, phase shift block exports as non-linear, if wherein there is single heater strip broken string, cannot reliably detect in time.
Therefore, need to design a kind of electrical heating wire broken thread detector, to solve the problems of the technologies described above.
Utility model content
The purpose of this utility model is to provide a kind of electrical heating wire broken thread detector, to solve the technical matters of electrical heating wire burn out detection.
In order to solve the problems of the technologies described above, the utility model provides a kind of electrical heating wire burn out detection, comprise: heating unit, and each electrical heating wire in parallel in described heating unit is divided into some electrical heating wire groups, wherein an electrical heating wire group and AC power and phase shift block form series circuit; And the electric current of each electrical heating wire group inputs to MCU module respectively by after corresponding detecting unit collection; Described detecting unit comprises: the current transformer being suitable for the electric current detecting electrical heating wire group, the amplification module be connected with described current transformer, and the A/D module be connected with this amplification module, and described A/D module is connected with MCU module; Meanwhile, setting a detecting unit is benchmaring unit.
Further, in order to make feeble signal be convenient to follow-up A/D module collection; Described amplification module is the two-stage calculation amplifying circuit be made up of in-phase proportion computing circuit.
Further, in order to carry out wireless networking, described MCU module is also suitable for burn out detection result to carry out wireless transmission by ZigBee module.
Further, for the ease of input command adapted thereto, described MCU module is also connected with button group.
Further, described MCU module is also connected with Liquid Crystal Module and/or voice alarm module.
The beneficial effects of the utility model are, electrical heating wire burn out detection of the present utility model gathers a roadbed calibration signal as current reference signal by described benchmaring unit, described MCU module is by comparing the electric current of other each roads collections and this current reference signal, to judge whether each electrical heating wire open circuit occurs; And this electrical heating wire burn out detection can also effectively avoid electric network noise on the impact of data acquisition, detection, effectively avoid erroneous judgement that phase shift block nonlinear object causes or fail to judge.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Fig. 1 shows the theory diagram of electrical heating wire broken thread detector.
Embodiment
By reference to the accompanying drawings the utility model is described in further detail now.These accompanying drawings are the schematic diagram of simplification, only basic structure of the present utility model are described in a schematic way, and therefore it only shows the formation relevant with the utility model.
Fig. 1 shows the theory diagram of electrical heating wire broken thread detector.
As shown in Figure 1, electrical heating wire broken thread detector of the present utility model, comprise: heating unit, and each electrical heating wire in parallel in described heating unit is divided into some electrical heating wire groups, wherein an electrical heating wire group and AC power and phase shift block form series circuit; And the electric current of each electrical heating wire group inputs to MCU module respectively by after corresponding detecting unit collection; Described detecting unit comprises: the current transformer being suitable for the electric current detecting electrical heating wire group, the amplification module be connected with described current transformer, and the A/D module be connected with this amplification module, and described A/D module is connected with MCU module; Meanwhile, setting a detecting unit is benchmaring unit.
Wherein, it can be symmetrical division that each electrical heating wire in parallel is divided into some electrical heating wire groups (N group considers that cost N generally gets 2), also can asymmetricly divide.
The utility model is by mutually comparing the N group heater strip load current change detected, whether extremely, can judge to make electric current in heater strip group, to judge whether heating circuit is short-circuited or open circuit, comprise electrical heating wire and whether phase shift block open circuit or short circuit occur.
Described MCU module, such as but not limited to employing single-chip microcomputer, embedded chip, optionally, can adopt not containing the MCU module of AD function, adopt external A/D module, also can adopt the MCU module with AD function.
Principle of work of the present utility model: gather a roadbed calibration signal as current reference signal by described benchmaring unit, described MCU module is by comparing the electric current of other each roads collections and this current reference signal, to judge whether each electrical heating wire open circuit occurs; And this electrical heating wire burn out detection can also effectively avoid electric network noise on the impact of data acquisition, detection, effectively avoid erroneous judgement that phase shift block nonlinear object causes or fail to judge.
Described amplification module is the two-stage calculation amplifying circuit be made up of in-phase proportion computing circuit, to improve signal amplitude, is convenient to A/D module and carries out analog to digital conversion.
As optional embodiment a kind of in the present embodiment.
Described MCU module is also suitable for burn out detection result being carried out wireless transmission by ZigBee module, to realize wireless networking.
Described MCU module is also connected with button group, so that input command adapted thereto; And described MCU module is also connected with Liquid Crystal Module and/or voice alarm module, checks to realize data and/or report to the police.
With above-mentioned according to desirable embodiment of the present utility model for enlightenment, by above-mentioned description, relevant staff in the scope not departing from this utility model technological thought, can carry out various change and amendment completely.The technical scope of this utility model is not limited to the content on instructions, must determine its technical scope according to right.
Claims (5)
1. an electrical heating wire broken thread detector, is characterized in that, comprising: heating unit, and each electrical heating wire in parallel in described heating unit is divided into some electrical heating wire groups, and wherein an electrical heating wire group and AC power and phase shift block form series circuit; And
The electric current of each electrical heating wire group inputs to MCU module respectively by after corresponding detecting unit collection;
Described detecting unit comprises: the current transformer being suitable for the electric current detecting electrical heating wire group, the amplification module be connected with described current transformer, and the A/D module be connected with this amplification module, and described A/D module is connected with MCU module;
Meanwhile, setting a detecting unit is benchmaring unit.
2. electrical heating wire broken thread detector as claimed in claim 1, it is characterized in that, described amplification module is the two-stage calculation amplifying circuit be made up of in-phase proportion computing circuit.
3. electrical heating wire broken thread detector as claimed in claim 2, it is characterized in that, described MCU module is also suitable for burn out detection result to carry out wireless transmission by ZigBee module.
4. electrical heating wire broken thread detector as claimed in claim 3, it is characterized in that, described MCU module is also connected with button group.
5. electrical heating wire broken thread detector as claimed in claim 4, it is characterized in that, described MCU module is also connected with Liquid Crystal Module and/or voice alarm module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520007425.5U CN204314415U (en) | 2015-01-06 | 2015-01-06 | A kind of electrical heating wire broken thread detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520007425.5U CN204314415U (en) | 2015-01-06 | 2015-01-06 | A kind of electrical heating wire broken thread detector |
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| Publication Number | Publication Date |
|---|---|
| CN204314415U true CN204314415U (en) | 2015-05-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520007425.5U Active CN204314415U (en) | 2015-01-06 | 2015-01-06 | A kind of electrical heating wire broken thread detector |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106646086A (en) * | 2017-02-25 | 2017-05-10 | 郑州畅威物联网科技有限公司 | Detection method for wire breaking of heating wire of semiconductor gas sensor |
| CN106646077A (en) * | 2016-11-18 | 2017-05-10 | 深圳市有方科技股份有限公司 | Detection apparatus used for detecting open and short circuit of load |
| CN111796001A (en) * | 2020-07-13 | 2020-10-20 | 宏辉磁电科技(安徽)有限公司 | Automatic alarm system for breakage of stick of sintering furnace |
-
2015
- 2015-01-06 CN CN201520007425.5U patent/CN204314415U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106646077A (en) * | 2016-11-18 | 2017-05-10 | 深圳市有方科技股份有限公司 | Detection apparatus used for detecting open and short circuit of load |
| CN106646086A (en) * | 2017-02-25 | 2017-05-10 | 郑州畅威物联网科技有限公司 | Detection method for wire breaking of heating wire of semiconductor gas sensor |
| CN111796001A (en) * | 2020-07-13 | 2020-10-20 | 宏辉磁电科技(安徽)有限公司 | Automatic alarm system for breakage of stick of sintering furnace |
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