CN204101236U - High-low pressure alarm detector - Google Patents
High-low pressure alarm detector Download PDFInfo
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- CN204101236U CN204101236U CN201420549801.9U CN201420549801U CN204101236U CN 204101236 U CN204101236 U CN 204101236U CN 201420549801 U CN201420549801 U CN 201420549801U CN 204101236 U CN204101236 U CN 204101236U
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Abstract
The utility model relates to a kind of high-low pressure alarm detector, for the Detection & Controling of pressure.Comprise pressure sensor module, program input interface module, export control interface module, watchdog circuit module and process chip, described program input interface model calling computer and process chip, by the program write process chip in computer, the pressure signal of input is converted to digital signal by described pressure sensor module, and by this digital data transmission to process chip, described process chip carries out high-low pressure judgement according to the program of write to digital signal, and the result of judgement is transferred to output control interface module, described watchdog circuit module is for safeguarding the normal operation of process chip.The utility model realizes the alarm detection of high-voltage signal and low-voltage signal simultaneously, and pressure threshold is adjustable, has good dirigibility and versatility, influenced by ambient temperature little.
Description
Technical field
The utility model relates to a kind of high-low pressure alarm detector, for the Detection & Controling of pressure.
Background technology
Existing high-low pressure pressure detection adopts different sensors to realize, adopt the detection control of high-pressure pressure sensor realization to high-voltage signal, adopt the detection control of low-pressure sensor realization to low-voltage signal, and pressure transducer force value is fixed, when different with low pressure threshold definition to HVT high voltage threshold, when namely application is different, force value can not regulate, variation cannot be realized, and sensor is influenced by environmental temperature by the factor such as manufacture craft, principle of itself.
Utility model content
In order to overcome the shortcoming of prior art, the utility model provides a kind of high-low pressure warning device.
Technical solutions of the utility model are as follows:
High-low pressure alarm detector, comprise pressure sensor module, program input interface module, export control interface module, watchdog circuit module and process chip, described pressure sensor module, program input interface module, export control interface module, watchdog circuit module is all connected with process chip, described program input interface model calling computer and process chip, by the program write process chip in computer, the pressure signal of input is converted to digital signal by described pressure sensor module, and by this digital data transmission to process chip, described process chip carries out high-low pressure judgement according to the program of write to digital signal, and the result of judgement is transferred to output control interface module, described watchdog circuit module is for safeguarding the normal operation of process chip.
Described pressure sensor module is made up of sensor chip and sensor electrical source circuit, the model of described sensor chip is SQ274-12398, described sensor electrical source circuit comprises two transistor Q1 and Q2, wherein the base stage of transistor Q2 is as the input end of power control signal RA5, the collector of described transistor Q2 is connected with power supply by resistance R6, the collector of described transistor Q2 is connected with the base stage of transistor Q1 by resistance R7, the collector connecting sensor chip of described transistor Q1.
As preferably, described process chip model is PIC16F1823.
Described watchdog circuit module comprises watchdog chip and house dog power circuit, and as preferably, described watchdog chip model is Max6864UK40D3S.
The utility model beneficial effect is: the alarm detection simultaneously realizing high-voltage signal and low-voltage signal, and pressure threshold is adjustable, has good dirigibility and versatility, influenced by ambient temperature little.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Fig. 1 is the utility model schematic diagram.
Fig. 2 is the utility model circuit diagram.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Consult Fig. 1 and Fig. 2.
High-low pressure alarm detector, it is characterized in that: comprise pressure sensor module, program input interface module, export control interface module, watchdog circuit module and process chip, described pressure sensor module, program input interface module, export control interface module, watchdog circuit module is all connected with process chip, described program input interface model calling computer and process chip, by the program write process chip in computer, the pressure signal of input is converted to digital signal by described pressure sensor module, and by this digital data transmission to process chip, described process chip carries out high-low pressure judgement according to the program of write to digital signal, and the result of judgement is transferred to output control interface module, described watchdog circuit module is for safeguarding the normal operation of process chip.
Described pressure sensor module is made up of sensor chip and sensor electrical source circuit, the model of described sensor chip is SQ274-12398, described sensor electrical source circuit comprises two transistor Q1 and Q2, wherein the base stage of transistor Q2 is as the input end of power control signal RA5, the collector of described transistor Q2 is connected with power supply by resistance R6, the collector of described transistor Q2 is connected with the base stage of transistor Q1 by resistance R7, the collector connecting sensor chip of described transistor Q1.
As preferably, described process chip model is PIC16F1823.
Described watchdog circuit module comprises watchdog chip and house dog power circuit, and as preferably, described watchdog chip model is Max6864UK40D3S.
Utility model works principle is, first, control program is write process chip by program input interface module p2, described program input interface module p2 uses pin apart from 2.54mmPIN socket, setting high-low pressure threshold value, and such as HVT high voltage threshold is set to 70 mm Hg, low pressure threshold is set to 10 mm Hg, now house dog power circuit block and process chip disconnect, and after program writes, is connected by house dog power circuit block with process chip.
Power control signal RA5 inputs, power on to sensor chip, by sensor chip, force value is converted into digital signal, be transferred to process chip, when equipment pressure signal is higher than 70 mm Hg, process chip output signal passes to and exports control interface p1, tells that external unit current demand signal is high-voltage signal; When equipment pressure signal is lower than 10 mm Hg, process chip output signal passes to and exports control interface p1, tells that external unit current demand signal is low-voltage signal.
In the process of process chip work, export a signal at set intervals watchdog circuit module, if exceed official hour do not send a signal to watchdog circuit module, then watchdog circuit module just replys a reset signal to process chip, prevents process chip from entering endless loop or brownout cisco unity malfunction because of program.
Above-mentioned drawings and Examples are only for illustration of the utility model, and any art those of ordinary skill to its suitable change done or modification, or is used other flower pattern instead and made this technical change, all should be considered as not departing from the utility model patent category.
Claims (4)
1. high-low pressure alarm detector, it is characterized in that: comprise pressure sensor module, program input interface module, export control interface module, watchdog circuit module and process chip, described pressure sensor module, program input interface module, export control interface module, watchdog circuit module is all connected with process chip, described program input interface model calling computer and process chip, by the program write process chip in computer, the pressure signal of input is converted to digital signal by described pressure sensor module, and by this digital data transmission to process chip, described process chip carries out high-low pressure judgement according to the program of write to digital signal, and the result of judgement is transferred to output control interface module, described watchdog circuit module is for safeguarding the normal operation of process chip.
2. high-low pressure alarm detector according to claim 1, it is characterized in that: described pressure sensor module is made up of sensor chip and sensor electrical source circuit, the model of described sensor chip is SQ274-12398, described sensor electrical source circuit comprises two transistor Q1 and Q2, wherein the base stage of transistor Q2 is as the input end of power control signal RA5, the collector of described transistor Q2 is connected with power supply by resistance R6, the collector of described transistor Q2 is connected with the base stage of transistor Q1 by resistance R7, the collector connecting sensor chip of described transistor Q1.
3. high-low pressure alarm detector according to claim 2, is characterized in that: described process chip model is PIC16F1823.
4. high-low pressure alarm detector according to claim 3, is characterized in that: described watchdog circuit module comprises watchdog chip and house dog power circuit, and described watchdog chip model is Max6864UK40D3S.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420549801.9U CN204101236U (en) | 2014-09-23 | 2014-09-23 | High-low pressure alarm detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420549801.9U CN204101236U (en) | 2014-09-23 | 2014-09-23 | High-low pressure alarm detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204101236U true CN204101236U (en) | 2015-01-14 |
Family
ID=52269655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420549801.9U Expired - Fee Related CN204101236U (en) | 2014-09-23 | 2014-09-23 | High-low pressure alarm detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204101236U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108519192A (en) * | 2018-04-17 | 2018-09-11 | 中国铁路哈尔滨局集团有限公司哈尔滨动车段 | A kind of hand-held EMU air-conditioning refrigerant pressure tester and test method |
-
2014
- 2014-09-23 CN CN201420549801.9U patent/CN204101236U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108519192A (en) * | 2018-04-17 | 2018-09-11 | 中国铁路哈尔滨局集团有限公司哈尔滨动车段 | A kind of hand-held EMU air-conditioning refrigerant pressure tester and test method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 215024 No. 158 Fangzhou Road, Suzhou Industrial Park, Suzhou City, Jiangsu Province Patentee after: Anjiu Medical Devices (Suzhou) Co., Ltd. Address before: 215200 Fangzhou Road 158, Suzhou Industrial Park, Suzhou City, Jiangsu Province Patentee before: Jie Ding medical instruments (Suzhou) Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150114 Termination date: 20190923 |