CN209514352U - A kind of flow signal detection circuit and control system - Google Patents
A kind of flow signal detection circuit and control system Download PDFInfo
- Publication number
- CN209514352U CN209514352U CN201920176644.4U CN201920176644U CN209514352U CN 209514352 U CN209514352 U CN 209514352U CN 201920176644 U CN201920176644 U CN 201920176644U CN 209514352 U CN209514352 U CN 209514352U
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- China
- Prior art keywords
- flow signal
- capacitor
- port
- detection circuit
- control chip
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Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
- H03K5/19—Monitoring patterns of pulse trains
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P13/00—Indicating or recording presence, absence, or direction, of movement
- G01P13/0006—Indicating or recording presence, absence, or direction, of movement of fluids or of granulous or powder-like substances
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
- H03K5/125—Discriminating pulses
- H03K5/1252—Suppression or limitation of noise or interference
Abstract
The utility model provides a kind of flow signal detection circuit characterized by comprising first resistor, second resistance, first capacitor, the second capacitor, third capacitor, diode and control chip；The first end of first resistor is connected with the output end of power supply, the second end of first resistor is connected with the cathode of diode, the first end of second resistance is connected with power supply, the second end of second resistance passes through the second capacity earth, the anode of diode is connected with the second end of second resistance, the electric discharge port and threshold value port for controlling chip are connected with the anode of diode, water flow sensor is connected by first capacitor with the triggering port for controlling chip, the voltage controling end mouth of chip is controlled by third capacity earth, controls the port the GND ground connection of chip.Based on the utility model, load switch is cut-off by the signal of MCU control module and the signal of detection circuit, hot water machine is effectively avoided and the case where dry combustion method occurs.
Description
Technical field
The utility model relates to field of flow detection, in particular to a kind of flow signal detection circuit and control system.
Background technique
Water flow detector is widely used on the waterway pipe of disengaging heat exchanger of hot water machine (device), main function
It is whether to have water in detection waterway pipe, and ensuring the problem of starting hot water machine under the situation for having water, prevent dry combustion method.
Most water flow sensing units for Hall element composition on the market are investigated, testing principle is to convert water-flow signal
At pulse signal and it is sent to MCU control module, MCU control module can determine whether have in waterway pipe after receiving pulse signal
Water, then open heating function.But the MCU control module interference by some indefinite factors, such as the interference of electromagnetic wave sometimes.
At this point, the output port of MCU control module will appear exception, accidentally exports a signal and go out, so that heater is in non-water flow
In the case of the case where working, causing hot water machine dry combustion method.
Utility model content
The utility model discloses a kind of flow signal detection circuit and control systems, so that hot water machine is in detection water flow letter
Number when from extraneous indefinite factor interference, its water-flow signal is judged simultaneously by MCU control module and detection circuit,
Effectively avoiding hot water machine there is the case where dry combustion method.
The utility model first embodiment provides a kind of flow signal detection circuit, comprising: first resistor, the second electricity
Resistance, first capacitor, the second capacitor, third capacitor, diode and control chip；
The first end of the first resistor is connected with the output end of power supply, the second end of the first resistor and two pole
The cathode of pipe is connected, and the first end of the second resistance is connected with the power supply, and the second end of the second resistance passes through second
The anode of capacity earth, the diode is connected with the second end of second resistance, the electric discharge port of the control chip and threshold value
Port is connected with the anode of the diode, the touching that the water flow sensor passes through the first capacitor and the control chip
Mouth of starting is connected, and the voltage controling end mouth of the control chip passes through the third capacity earth, the GND of the control chip
Port ground connection.
Preferably, further include Switching Power Supply, the output end of the Switching Power Supply and it is described control chip the port VCC and
Reseting port is connected.
Preferably, the model LM555CM of the control chip.
The utility model second embodiment provides a kind of flow signal control system, including water flow sensor, MCU control
Molding block, decision circuitry and any one flow signal detection circuit as described above, the input terminal of the MCU control module with
The water flow sensor is connected, and the output end of the MCU control module is connected with the first end of the decision circuitry, the control
The output end of coremaking piece is connected with the second end of the decision circuitry.
It preferably, further include load switch；
The input terminal of the load switch is connected with the output end of the decision circuitry.
Preferably, the decision circuitry is AND gate circuit.
Preferably, the load switch is relay.
Based on a kind of flow signal detection circuit and control system disclosed in the utility model embodiment, the water flow is passed
Pulse signal is sent to the MCU control module and flow signal detection circuit simultaneously by sensor, and is controlled simultaneously by the MCU
The pulse signal that module and flow signal detection circuit transmit water flow sensor detects, and controls and if only if the MCU
When molding block and the output of flow signal detection circuit are all high level, decision circuitry exports high level to load switch, and load is opened
Conducting is closed, so that heater is devoted oneself to work, can effectively avoid in the case where only MCU control module, since MCU controls mould
The case where block is accidentally exported electric signal by external electromagnetic wave interference and leads to heater dry combustion method.
Detailed description of the invention
Fig. 1 is the utility model first embodiment flow signal detection circuit schematic diagram；
Fig. 2 is the utility model second embodiment flow signal control system schematic diagram；
Specific embodiment
It is practical below in conjunction with this to keep the purposes, technical schemes and advantages of the utility model embodiment clearer
The technical solution in the utility model embodiment is clearly and completely described in attached drawing in novel embodiment, shows
So, described embodiment is a part of embodiment of the utility model, rather than whole embodiments.It is practical based on this
Embodiment in novel, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment is fallen within the protection scope of the utility model.Therefore, the implementation to the utility model provided in the accompanying drawings below
The detailed description of mode is not intended to limit the range of claimed invention, but is merely representative of the utility model
Selected embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making creative labor
Every other embodiment obtained under the premise of dynamic, fall within the protection scope of the utility model.
It elaborates below in conjunction with attached drawing to specific embodiment of the utility model.
Referring to Fig. 1, the utility model first embodiment provides a kind of flow signal detection circuit, comprising: the first electricity
Hinder R1, second resistance R2, first capacitor C1, the second capacitor C2, third capacitor C3, diode D1 and control chip；
The first end of the first resistor R1 is connected with the output end of power supply, the second end of the first resistor R1 with it is described
The cathode of diode D1 is connected, and the first end of the second resistance R2 is connected with the power supply, and the second of the second resistance R2
End is grounded by the second capacitor C2, and the anode of the diode D1 is connected with the second end of second resistance R2, the control chip
Electric discharge port and threshold value port be connected with the anode of the diode D1, the water flow sensor passes through the first capacitor
C1 is connected with the triggering port of the control chip, and the voltage controling end mouth of the control chip is connect by the third capacitor C3
Ground, the port the GND ground connection of the control chip.
Wherein, the first resistor R1 is the pull-up resistor that the control chip triggers port, for preventing chip from puncturing.
The first capacitor C1 is coupled capacitor, and only when input signal is the pulse signal of variation, signal can just flow through, and so may be used
Filter out the signal except water flow sensor.The second resistance R2 and the second capacitor C2 forms RC network, with control
The width of the high level of output end output, the second capacitor C2 charge by the second resistance R2's, when the threshold
When value port voltage reaches 2/3rds of supply voltage, control chip output mouth exports a low level signal.Described two
Pole pipe D1 is coupled so that the pulse train from flow sensor is repeatedly short-circuit, and the second capacitor C2 can prevent control chip
Upper threshold value port reaches threshold voltage.
It preferably, further include Switching Power Supply, the output end of the Switching Power Supply is with the port VCC for controlling chip and again
Bit port is connected.
The Switching Power Supply is used to for the alternating voltage of AC 220V being converted into the DC voltage of DC 5V, to drive flow to believe
The work of number detection circuit.
Preferably, the model LM555CM of the control chip.
Certainly, in the other embodiments of the utility model, the chip of other models can also be used, the utility model is not
Make specific limit.
Flow signal detection circuit in the present embodiment may filter that by the way that coupled capacitor is arranged except water flow sensor
Other non-pulse signals except the pulse signal of generation, and then the interference of power down magnetic wave is effectively avoided, to be aligned
True testing result.
Referring to Fig. 2, the utility model second embodiment provides a kind of flow signal control system, including water flow passes
Sensor 1, MCU control module 3, decision circuitry 4 and any one flow signal detection circuit 2 as described above, the MCU control
The input terminal of module 3 is connected with the water flow sensor 1, the output end of the MCU control module 3 and the decision circuitry 4
First end be connected, it is described control chip output end be connected with the second end of the decision circuitry.
It preferably, further include load switch 5；
The input terminal of the load switch 5 is connected with the output end of the decision circuitry 4.
When the load switch 5 receives 4 one high level signals of decision circuitry, switch conduction makes heating device
Start to work, when the electric signal of the decision circuitry 4 received from it is preset different when, a low level is exported, so that institute
Load switch disconnection is stated, heating device stops working.
Preferably, the decision circuitry can be AND gate circuit, be also possible to other corresponding decision circuitries, these
Scheme is within the protection scope of the utility model.
Preferably, the load switch can be relay, can also be silicon-controlled Deng switching devices, can be used for receiving judgement electricity
Switching load after the electric signal on road, these schemes are within the protection scope of the utility model.
Pulse signal is sent to institute by a kind of flow control system disclosed in the present embodiment, the water flow sensor simultaneously
MCU control module and flow signal detection circuit are stated, and simultaneously by the MCU control module and flow signal detection circuit to water
The pulse signal of flow sensor transmission is detected, defeated and if only if the MCU control module and flow signal detection circuit
When being out all high level, decision circuitry output high level to load switch, load switch conducting, so that heater is devoted oneself to work,
It can effectively avoid in the case where only MCU control module, since MCU control module is accidentally exported telecommunications by external electromagnetic wave interference
Number and the case where lead to heater dry combustion method.
Above are merely preferred embodiments of the utility model, the protection scope of the utility model is not limited merely to above-mentioned
Embodiment, technical solution belonging to the idea of the present invention belong to the protection scope of the utility model.
Claims (7)
1. a kind of flow signal detection circuit characterized by comprising first resistor, second resistance, first capacitor, the second electricity
Appearance, third capacitor, diode and control chip；
The first end of the first resistor is connected with the output end of power supply, the second end of the first resistor and the diode
Cathode is connected, and the first end of the second resistance is connected with the power supply, and the second end of the second resistance passes through the second capacitor
The anode of ground connection, the diode is connected with the second end of second resistance, the electric discharge port and threshold value port of the control chip
It is connected with the anode of the diode, the triggering port phase that water flow sensor passes through the first capacitor and the control chip
Even, the voltage controling end mouth of the control chip passes through the third capacity earth, the port the GND ground connection of the control chip.
2. a kind of flow signal detection circuit according to claim 1, which is characterized in that it further include Switching Power Supply, it is described
The output end of Switching Power Supply is connected with the port VCC of the control chip and reseting port.
3. a kind of flow signal detection circuit according to claim 1, which is characterized in that the model of the control chip
LM555CM。
4. a kind of flow signal control system, which is characterized in that including water flow sensor, MCU control module, decision circuitry and
Any one flow signal detection circuit as described in right wants 1 to 3, the input terminal of the MCU control module and the water flow
Quantity sensor is connected, and the output end of the MCU control module is connected with the first end of the decision circuitry, the control chip
Output end is connected with the second end of the decision circuitry.
5. a kind of flow signal control system according to claim 4, which is characterized in that further include load switch；
The input terminal of the load switch is connected with the output end of the decision circuitry.
6. a kind of flow signal control system according to claim 5, which is characterized in that the decision circuitry is and door is electric
Road.
7. a kind of flow signal control system according to claim 5, which is characterized in that the load switch is relay
Device.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920176644.4U CN209514352U (en) | 2019-01-31 | 2019-01-31 | A kind of flow signal detection circuit and control system |
| GB1917720.3A GB2581239B8 (en) | 2019-01-31 | 2019-12-04 | Flow signal detection circuit and control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920176644.4U CN209514352U (en) | 2019-01-31 | 2019-01-31 | A kind of flow signal detection circuit and control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209514352U true CN209514352U (en) | 2019-10-18 |
Family
ID=68203638
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920176644.4U Active CN209514352U (en) | 2019-01-31 | 2019-01-31 | A kind of flow signal detection circuit and control system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN209514352U (en) |
| GB (1) | GB2581239B8 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109683537A (en) * | 2019-01-31 | 2019-04-26 | 厦门阿玛苏电子卫浴有限公司 | A kind of flow signal detection circuit, control system and control method |
-
2019
- 2019-01-31 CN CN201920176644.4U patent/CN209514352U/en active Active
- 2019-12-04 GB GB1917720.3A patent/GB2581239B8/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109683537A (en) * | 2019-01-31 | 2019-04-26 | 厦门阿玛苏电子卫浴有限公司 | A kind of flow signal detection circuit, control system and control method |
Also Published As
| Publication number | Publication date |
|---|---|
| GB201917720D0 (en) | 2020-01-15 |
| GB2581239A8 (en) | 2021-10-13 |
| GB2581239A (en) | 2020-08-12 |
| GB2581239B8 (en) | 2021-10-13 |
| GB2581239B (en) | 2021-09-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211129 Address after: 361028 floor 3, plant 1, No. 8, Xinguang Road, Xinyang street, Haicang District, Xiamen City, Fujian Province Patentee after: XIAMEN E-TEC ELECTRIC SHOWER CO.,LTD. Address before: No.11, Haijing East 2nd Road, Xiamen area (bonded port area), China (Fujian) pilot Free Trade Zone, Xiamen City, Fujian Province, 361000 Patentee before: XIAMEN AQUASU ELECTRIC SHOWER CO.,LTD. |
|
| TR01 | Transfer of patent right |