CN202648766U - Coal feeder intelligent weighing sensor - Google Patents
Coal feeder intelligent weighing sensor Download PDFInfo
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- CN202648766U CN202648766U CN 201120508460 CN201120508460U CN202648766U CN 202648766 U CN202648766 U CN 202648766U CN 201120508460 CN201120508460 CN 201120508460 CN 201120508460 U CN201120508460 U CN 201120508460U CN 202648766 U CN202648766 U CN 202648766U
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- coal feeder
- weighing
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Abstract
The utility model relates to a coal feeder intelligent weighing sensor which comprises a weighing circuit, an intelligent chip and an external cable. The weighing circuit sends a voltage signal to the intelligent chip which converts the voltage signal of the weighing circuit into a current signal through A/D and D/A conversion and outputs the current signal to a coal feeder control system through the external cable. An interference problem of sensor signal long distance transmission is solved. At the same time, a special identification signal can be outputted, the intelligent weighing of a coal feeder is realized, and a self-diagnosis function of the coal feeder control system to the weighing sensor is realized.
Description
Technical field
The utility model relates to a kind of sensor, particularly the intelligent LOAD CELLS of a kind of feeder.
Background technology
Electronic weighing type coal feeder is widely used in fuel-burning power plant coal furnace pulverized coal preparation system.The core component of electronic weighing type coal feeder is LOAD CELLS.At present, the LOAD CELLS of most domestic electronic weighing type coal feeder employing all is the voltage-type output type sensor.Voltage-output type sensor exists sensitivity to disturb and the interference at zero point in principle.The working environment of feeder reality is very severe often, and signal often needs long-distance transmissions, and the interference of electromagnetic field is larger, and the use of Voltage-output type sensor is restricted, and has exposed the shortcomings such as antijamming capability is relatively poor.Also be superimposed with alternating component on the DC voltage of sometimes sensor output, make the single-chip microcomputer generation erroneous judgement of sensor-lodging in the coal feeder control system disconnected, mistake appears in control, also can damage equipment when serious.Simultaneously, the ability that coal feeder control system is judged the duty neither one of LOAD CELLS is not often just known the LOAD CELLS operation irregularity after the coal supply rate reaches the requirement of weighing.
Summary of the invention
The utility model is the problem for used LOAD CELLS poor anti jamming capability in the present coal machine control system, has proposed the intelligent LOAD CELLS of a kind of feeder, can the current output type sensor signal, realize the long-distance transmissions of sensor signal.Simultaneously can export the specific identification signal, coal feeder control system can be identified and self diagnosis LOAD CELLS.Not affected by environment and distance factor, solve the interference problem of sensor signal long-distance transmissions.
The technical solution of the utility model is: the intelligent LOAD CELLS of a kind of feeder, comprise weighing circuit, intelligent chip and external cable, weighing circuit is sent into voltage signal in the intelligent chip, intelligent chip is by A/D and D/A conversion, converts the voltage signal of weighing circuit to current signal and exports coal feeder control system to by external cable again.
Described weighing circuit is combined by four voltage dependent resistor (VDR)s that couple together with resistance bridge; Intelligent chip comprises power module, A/D module, microprocessor and D/A module, and power module is a low pressure difference linearity voltage stabilizing chip, and the voltage transitions that coal feeder control system is provided becomes the required voltage of AD chip, microprocessor and weighing circuit.
The beneficial effects of the utility model are: the intelligent LOAD CELLS of a kind of feeder of the utility model, the interference problem of solution sensor signal long-distance transmissions.Simultaneously can export the specific identification signal, realize that the intellectuality of feeder is weighed, guarantee that coal feeder control system is to the self-diagnostic function of LOAD CELLS.
Description of drawings
Fig. 1 is the intelligent LOAD CELLS theory diagram of the utility model feeder;
Fig. 2 is the intelligent LOAD CELLS circuit theory diagrams of the utility model feeder.
Embodiment
The intelligent LOAD CELLS theory diagram of feeder comprises weighing circuit 1, intelligent chip 2 and external cable 3 as shown in Figure 1.Weighing circuit 1 is sent into voltage signal in the intelligent chip 2, and intelligent chip 2 is by A/D and D/A conversion, converts the voltage signal of weighing circuit 1 to current signal and exports coal feeder control system 4 to by external cable 3 again.
Weighing circuit 1 voltage dependent resistor (VDR) of being got up by four dependency structure Colaesces that utilized resistance bridge combines as shown in Figure 2.The difference of sensor pressure, resistance value changes, and corresponding resistance bridge output voltage is different.Intelligent chip 2 comprises power module, A/D module, microprocessor and D/A module.Power module is a low pressure difference linearity voltage stabilizing chip, and the voltage transitions that coal feeder control system is provided becomes the required voltage of AD chip, microprocessor and weighing circuit.The A/D module is transformed into digital signal with the voltage signal of weighing circuit, exports corresponding current signal through control D/A module after the microprocessor processes.Current signal does not have sensitivity interference and zero degree to disturb, and has very high stability when long-distance transmissions.Microprocessor can pass through Programming, control D/A module output specific current signal.Output current signal forms the sampling voltage signal in coal feeder control system 4 terminals by precision resistance, the microprocessor of coal feeder control system 4 is analyzed the sampling voltage signal, judge the duty of intelligent weighing sensor, reach control system to identification and the self-diagnostic function of LOAD CELLS.
Claims (2)
1. the intelligent LOAD CELLS of a feeder, it is characterized in that, comprise weighing circuit, intelligent chip and external cable, weighing circuit is sent into voltage signal in the intelligent chip, intelligent chip is by A/D and D/A conversion, converts the voltage signal of weighing circuit to current signal and exports coal feeder control system to by external cable again.
2. the intelligent LOAD CELLS of described feeder according to claim 1 is characterized in that, described weighing circuit is combined by four voltage dependent resistor (VDR)s that couple together with resistance bridge; Intelligent chip comprises power module, A/D module, microprocessor and D/A module, and power module is a low pressure difference linearity voltage stabilizing chip, and the voltage transitions that coal feeder control system is provided becomes the required voltage of AD chip, microprocessor and weighing circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120508460 CN202648766U (en) | 2011-12-08 | 2011-12-08 | Coal feeder intelligent weighing sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120508460 CN202648766U (en) | 2011-12-08 | 2011-12-08 | Coal feeder intelligent weighing sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202648766U true CN202648766U (en) | 2013-01-02 |
Family
ID=47417861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120508460 Expired - Lifetime CN202648766U (en) | 2011-12-08 | 2011-12-08 | Coal feeder intelligent weighing sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202648766U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104006868A (en) * | 2013-02-26 | 2014-08-27 | 梅特勒-托利多(常州)精密仪器有限公司 | Intelligent simulation type weighing sensor and self-diagnosis method thereof |
| WO2015007106A1 (en) * | 2013-07-17 | 2015-01-22 | 北京睿声智诚科技有限责任公司 | Device for monitoring audio signal transmission |
| WO2016055016A1 (en) * | 2014-10-09 | 2016-04-14 | 梅特勒-托利多(常州)精密仪器有限公司 | Weighing sensor, weighing network and monitoring method |
-
2011
- 2011-12-08 CN CN 201120508460 patent/CN202648766U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104006868A (en) * | 2013-02-26 | 2014-08-27 | 梅特勒-托利多(常州)精密仪器有限公司 | Intelligent simulation type weighing sensor and self-diagnosis method thereof |
| CN104006868B (en) * | 2013-02-26 | 2016-04-13 | 梅特勒-托利多(常州)精密仪器有限公司 | Artificial intelligence formula LOAD CELLS and self-diagnosing method thereof |
| WO2015007106A1 (en) * | 2013-07-17 | 2015-01-22 | 北京睿声智诚科技有限责任公司 | Device for monitoring audio signal transmission |
| CN105379262A (en) * | 2013-07-17 | 2016-03-02 | 北京睿声智诚科技有限责任公司 | Device for monitoring audio signal transmission |
| CN105379262B (en) * | 2013-07-17 | 2019-02-19 | 北京睿声智诚科技有限责任公司 | A kind of monitoring sound intermediate frequency signal transmitting apparatus |
| WO2016055016A1 (en) * | 2014-10-09 | 2016-04-14 | 梅特勒-托利多(常州)精密仪器有限公司 | Weighing sensor, weighing network and monitoring method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130102 |
|
| CX01 | Expiry of patent term |