CN201886307U - Bean curd machine air pressure detection and control circuit - Google Patents
Bean curd machine air pressure detection and control circuit Download PDFInfo
- Publication number
- CN201886307U CN201886307U CN2010205968482U CN201020596848U CN201886307U CN 201886307 U CN201886307 U CN 201886307U CN 2010205968482 U CN2010205968482 U CN 2010205968482U CN 201020596848 U CN201020596848 U CN 201020596848U CN 201886307 U CN201886307 U CN 201886307U
- Authority
- CN
- China
- Prior art keywords
- circuit
- control circuit
- mcu
- bean curd
- air pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 235000013527 bean curd Nutrition 0.000 title claims abstract description 13
- 238000001514 detection method Methods 0.000 title claims description 13
- 238000000034 method Methods 0.000 abstract description 2
- 230000003321 amplification Effects 0.000 abstract 4
- 238000003199 nucleic acid amplification method Methods 0.000 abstract 4
- 238000006243 chemical reaction Methods 0.000 abstract 3
- 230000001629 suppression Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 5
- 238000007599 discharging Methods 0.000 description 2
- 230000005764 inhibitory process Effects 0.000 description 2
- 238000011897 real-time detection Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
Images
Landscapes
- Measuring Fluid Pressure (AREA)
Abstract
The utility model relates to an atmospheric pressure of domestic appliance detects and control circuit, specifically is a bean curd machine atmospheric pressure detects and control circuit. The circuit includes: the device comprises a power supply circuit, a constant current source circuit, a pressure sensor, a differential amplification circuit, an A/D conversion module, an MCU, an electromagnetic valve control circuit and an air pump control circuit, wherein the connection relationship is as follows: the power supply circuit is respectively connected with the constant current source circuit, the differential amplification circuit, the A/D conversion module, the MCU and the electromagnetic valve control circuit, the constant current source circuit, the pressure sensor, the differential amplification circuit, the A/D conversion module and the MCU are sequentially connected, and the MCU is also respectively connected with the electromagnetic valve control circuit and the air pump control circuit. The circuit realizes automatic control of the air pressure of the bean curd machine, processes signals of the pressure sensor through the differential amplification circuit, and has the advantages of common-mode interference suppression, automatic temperature compensation and the like.
Description
Technical field
The utility model relates to a kind of air pressure Detection ﹠ Controling circuit of household electrical appliance, specifically is a kind of bean curd machine air pressure Detection ﹠ Controling circuit.
Background technology
The present small household electrical appliance of selling on the market much all uses the advantage of air pressure to realize the function of product, such as the mechanical, electrical pressure cooker of bean curd, and automatic tire atmosphere instrument etc.Yet the used technology major part of these products all is to utilize material and some characteristic of structure to realize control to air pressure, it is not high that this control method has control inaccuracy and sensitivity, the atmospheric pressure value of control is single, can not adjust installing in real time according to user's actual demand, control not intelligent shortcoming.
In addition, also select for use pressure transducer to come the detected pressures signal though on market, also have some small household electrical appliances, but it adopts is amplifying circuit rather than selects difference input type amplifying circuit for use, therefore Circuits System is subjected to Temperature Influence bigger, and can not suppress the common mode interference signal of sensor because of brought by electromagnetic interference (EMI) and technogenic influence own, make air pressure test shortcomings such as inaccurate.
The utility model content
The technical matters that the utility model solves provides a kind of bean curd machine air pressure Detection ﹠ Controling circuit, makes it not only can suppress common mode interference and temperature is floated, but also can realize the automatic control of its air pressure.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is:
A kind of bean curd machine air pressure Detection ﹠ Controling circuit, it is characterized in that this circuit comprises: power circuit, constant-current source circuit, pressure transducer, differential amplifier circuit, the A/D modular converter, MCU, solenoid valve control circuit, the air pump control circuit, its annexation is: power circuit respectively with this constant-current source circuit, this differential amplifier circuit, this A/D modular converter, this MCU and this solenoid valve control circuit connect, and this constant-current source circuit, pressure transducer, differential amplifier circuit, the A/D modular converter, MCU connects successively, and this MCU also respectively with this solenoid valve control circuit, the air pump control circuit connects.
As one of improving: described pressure transducer is a gauge pressure type pressure transducer.
As two of improvement: described differential amplifier circuit is that enlargement factor is 50-150 integrated operational amplifier circuit or a discrete component triode doubly.
As three of improvement: described power circuit is low frequency linear power supply or high frequency switch power.
Compared with prior art, the beneficial effects of the utility model are: this air pressure Detection ﹠ Controling circuit is handled the signal of pressure transducer by differential amplifier circuit, has advantages such as the common mode interference of inhibition and auto thermal compensation.In addition, for Circuits System: have and detect accurately, highly sensitive, stable and reliable for performance, with low cost, advantage such as circuit board technology is simple; For systemic-function: the MCU central processing unit is analyzed according to detected air pressure signal, realizes control to solenoid valve and air pump according to user's needs, thereby realizes air pressure in the gas tank is carried out real-time Detection ﹠ Controling.
Description of drawings
Fig. 1 is a principle schematic of the present utility model.
Embodiment
As shown in Figure 1, bean curd machine air pressure Detection ﹠ Controling circuit of the present utility model comprises: power circuit 1, constant-current source circuit 2, pressure transducer 3, differential amplifier circuit 4, A/D modular converter 5, MCU6, solenoid valve control circuit 7, air pump control circuit 8.The annexation of these parts is: power circuit 1 is connected with this constant-current source circuit 2, this differential amplifier circuit 4, this A/D modular converter 5, this MCU6 and this solenoid valve control circuit 7 respectively, and this constant-current source circuit 2, pressure transducer 3, differential amplifier circuit 4, A/D modular converter 5, MCU6 connect successively, and this MCU6 also is connected with this solenoid valve control circuit 7, air pump control circuit 8 respectively.
Wherein, these pressure transducer 3 employing detected pressures ranges are 0 to 15PSI gauge pressure type pressure transducer.This pressure transducer inside is bridge-type by voltage dependent resistor (VDR) and connects, and realize the detection to pressure, and have the difference output function linear with pressure, and have can be in the characteristics of temperature for-40 to 125 degrees centigrade of operate as normal.
Wherein, this constant-current source circuit 2 adopts amplifier LM324 to realize that the constant current function provides stable electric current to pressure transducer 3, and its electric current generally is not more than 1 milliampere, selects 0.6 milliampere in the present embodiment for use.
Wherein, this differential amplifier circuit 4 can be selected enlargement factor to be 50 to 150 times and select discrete component triode or integrated transporting discharging.In the present embodiment, selecting big multiple is 120 times integrated transporting discharging LM324.
Wherein, this A/D modular converter 5 both can be a circuit module independently, also can be the module that is integrated among the MCU.
Wherein, this solenoid valve control circuit 7 and this air pump control circuit 8 can be decided selected control system circuit according to the gentle pump type of solenoid valve, for example can select relay, triode, field effect transistor, controllable silicon etc. for use.In the present embodiment, select NPN triode S8050 for use, the TO-92 packaging.
Wherein, this power circuit can be selected low frequency linear power supply or high frequency switch power for use, and can export the power supply that satisfies air pump and solenoid valve voltage and power requirement respectively.In the present embodiment, use and select the low frequency linear power supply for use, and can export 12V and 5V voltage, the 12V output current is (400 to 700 milliamperes), and the 5V output current is (50 to 250 milliamperes).
The utility model is processed the signal of pressure sensor by differential amplifier circuit, has the advantages such as the common mode disturbances of inhibition and auto thermal compensation. In addition, for Circuits System: have and detect accurately, highly sensitive, stable and reliable for performance, with low cost, the advantage such as circuit board technology is simple; For systemic-function: the MCU central processing unit is analyzed according to the air pressure signal that detects, realizes control to magnetic valve and air pump according to user's needs, thereby realizes air pressure in the gas tank is carried out real-time Detection ﹠ Controling.
Claims (4)
1. bean curd machine air pressure Detection ﹠ Controling circuit, it is characterized in that this circuit comprises: power circuit (1), constant-current source circuit (2), pressure transducer (3), differential amplifier circuit (4), A/D modular converter (5), MCU (6), solenoid valve control circuit (7), air pump control circuit (8), its annexation is: power circuit (1) respectively with this constant-current source circuit (2), this differential amplifier circuit (4), this A/D modular converter (5), this MCU (6) and this solenoid valve control circuit (7) connect, and this constant-current source circuit (2), pressure transducer (3), differential amplifier circuit (4), A/D modular converter (5), MCU (6) connects successively, and this MCU (6) also respectively with this solenoid valve control circuit (7), air pump control circuit (8) connects.
2. bean curd machine air pressure Detection ﹠ Controling circuit according to claim 1, it is characterized in that: described pressure transducer (3) is a gauge pressure type pressure transducer.
3. bean curd machine air pressure Detection ﹠ Controling circuit according to claim 1 is characterized in that: described differential amplifier circuit (2) is 50-150 integrated operational amplifier circuit or a discrete component triode doubly for enlargement factor.
4. bean curd machine air pressure Detection ﹠ Controling circuit according to claim 1, it is characterized in that: described power circuit (1) is low frequency linear power supply or high frequency switch power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205968482U CN201886307U (en) | 2010-11-05 | 2010-11-05 | Bean curd machine air pressure detection and control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205968482U CN201886307U (en) | 2010-11-05 | 2010-11-05 | Bean curd machine air pressure detection and control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201886307U true CN201886307U (en) | 2011-06-29 |
Family
ID=44183855
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205968482U Expired - Lifetime CN201886307U (en) | 2010-11-05 | 2010-11-05 | Bean curd machine air pressure detection and control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201886307U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103187871A (en) * | 2011-12-30 | 2013-07-03 | 北京谊安医疗系统股份有限公司 | Power supply control device of magnetic valve flow in anaesthesia machine and method thereof |
| CN110237516A (en) * | 2019-07-18 | 2019-09-17 | 成都金杰利警用器材有限公司 | A kind of more gasbag-type boxing weight detecting targets |
-
2010
- 2010-11-05 CN CN2010205968482U patent/CN201886307U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103187871A (en) * | 2011-12-30 | 2013-07-03 | 北京谊安医疗系统股份有限公司 | Power supply control device of magnetic valve flow in anaesthesia machine and method thereof |
| CN103187871B (en) * | 2011-12-30 | 2016-04-20 | 北京谊安医疗系统股份有限公司 | The power control of electromagnetically operated valve flow and method in a kind of Anesthesia machine |
| CN110237516A (en) * | 2019-07-18 | 2019-09-17 | 成都金杰利警用器材有限公司 | A kind of more gasbag-type boxing weight detecting targets |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201886307U (en) | Bean curd machine air pressure detection and control circuit | |
| CN201578035U (en) | Electric pressure cooker pressure detecting device capable of detecting pressure directly and accurately | |
| CN101858941A (en) | Capacitor sensing circuit having anti-electromagnetic interference capability | |
| CN209961315U (en) | Dynamic and static railroad track scale weighing instrument | |
| CN204495452U (en) | A kind of multifunction electronic kitchen scale | |
| CN201788222U (en) | AC-DC (alternating current-direct current) compatible isolated voltage sampling circuit | |
| CN203053527U (en) | Weight sensors, microwave oven and container applying the weight sensors | |
| CN204718715U (en) | Intelligent pressure sensing testing system | |
| CN204575724U (en) | The testing circuit of ac supply signal and heating arrangement | |
| CN102928649A (en) | Current sensor for static synchronous compensator | |
| CN103575434A (en) | Pressure detection circuit | |
| CN201122157Y (en) | Special equipment for panary fermentation detection | |
| CN110646195A (en) | System and method for detecting action time of electromagnetic valve | |
| CN205449372U (en) | Single chip microcomputer control's digital altimeter | |
| CN202916330U (en) | Current sensor used for static synchronous compensator | |
| CN213780687U (en) | Power socket control system for humidity and electric leakage induction | |
| CN207231657U (en) | A kind of temperature collection circuit with multi-protocols output | |
| CN203561476U (en) | Electric pressure cooker and pressure detection device thereof | |
| CN210323186U (en) | Current detection circuit | |
| CN209513895U (en) | A kind of current sampling circuit for motor control | |
| CN203138069U (en) | Pressure control circuit used for electric pressure cooker | |
| CN108494865B (en) | Remote wireless electromagnetic valve control system based on Internet of things | |
| CN203350756U (en) | High-precision numerically-controlled adjustable stabilized voltage supply | |
| CN202013377U (en) | Ultramicro current detecting device | |
| CN201541298U (en) | Processing device for video signals |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: MIDEA GROUP CO., LTD. Free format text: FORMER NAME: MEIDI GROUP CO. LTD. |
|
| CP03 | Change of name, title or address |
Address after: 528311 Guangdong, Foshan, Beijiao, the United States, the United States and the United States on the avenue of the United States, the headquarters of the United States building B floor, District, 26-28 Patentee after: MIDEA GROUP Co.,Ltd. Address before: 528311 beautiful road, Beijiao Town, Shunde District, Guangdong, Foshan Patentee before: Midea Group |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110629 |