CN207627310U - Control circuit and sphygmomanometer and pressure control device comprising same - Google Patents
Control circuit and sphygmomanometer and pressure control device comprising same Download PDFInfo
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- CN207627310U CN207627310U CN201720417314.0U CN201720417314U CN207627310U CN 207627310 U CN207627310 U CN 207627310U CN 201720417314 U CN201720417314 U CN 201720417314U CN 207627310 U CN207627310 U CN 207627310U
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Abstract
A control circuit comprising a signal generating circuit and a protection control circuit, wherein the signal generating circuit has a control signal output terminal and a protection signal output terminal, the control signal output terminal outputs a control signal to the protection control circuit, the protection signal output terminal outputs a protection signal to the protection control circuit, and the protection control circuit determines whether to output the control signal according to the control signal and the protection signal. The embodiment of the utility model provides a still provide sphygmomanometer and pressure control device including this control circuit. The utility model discloses control circuit simple structure is practical, and control is accurate, can effectively avoid the risk because of the control device leads to unusually.
Description
Technical field
The utility model is related to a kind of circuit structures, and in particular to a kind of control circuit and the blood pressure including the control circuit
Meter and pressure control device.
Background technology
Control circuit is that the device of different function links together the circuit acted as requested.In general control electricity
Lu Zhong, control signal is typically directly transferred to by control device, due to lacking protection, so will appear not in the case of accident
Desired risk, such as equipment operation irregularity, personal injury.
As shown in Figure 1, in typical sphygmomanometer air pump driving circuit, signal generating circuit MCU is by supply voltage VCC1
Power supply, air pump are powered by supply voltage VCC3.It is connected to n-channel depletion field effect transistor from the control terminal of MCU by resistance R1
The grid G of Q1, motor M1 are connected to the drain D of Q1, the source S ground connection of Q1.Wherein, supply voltage VCC1 and supply voltage VCC3
It can be the same supply voltage, supply voltage can also be different.
The control signal cs of MCU outputs controls the on and off of field-effect tube Q1 by resistance R1.When MCU outputs are effective
Control signal cs when, control signal cs is high level, Q1 conductings, air pump M1 work, to blood pressure cuff inflating pressure.Conversely,
Air pump M1 does not work, and stops pressurizeing to cuff inflation.
In foregoing circuit, when MCU operation irregularities, such as MUC resets or program pointer is abnormal, the control of MCU outputs
Signal cs processed may be continuously high level, and for air pump M1 persistently to cuff inflation, the limbs of testee are persistently oppressed in cuff pressurization,
Lead to testee's limb ischemia, will produce the risk of testee's limb necrosis.
Utility model content
In order to solve the problems, such as that above-mentioned control circuit operation irregularity can cause controlled device operation irregularity, the utility model real
It applies example and proposes a kind of control circuit and the sphygmomanometer including the control circuit and pressure control device.
A kind of control circuit, the control circuit include signal generating circuit and protection control circuit, wherein the signal
There is generation circuit control signal output and protection signal output end, the control signal output to output a control signal to institute
State protection control circuit, the protection signal output end output protection signal to the protection control circuit, the protection control
Circuit determines whether to export the control signal according to the control signal and the protection signal.
Further, protection control circuit is made of multiple logical devices and/or analog device and/or signal generates electricity
Road is logical device or analog device.
Further, composition protection control circuit device be selected from resistance, capacitance, diode, triode, field-effect tube,
IGBT pipes, GTO and GTR.
Further, signal generating circuit is CPU or MCU.
Further, protection control circuit includes first resistor R1, second resistance R2,3rd resistor R3, field-effect tube Q1
With triode Q2, the control signal output is connected to the grid of field-effect tube Q1, field-effect tube Q1 by first resistor R1
Source electrode ground connection, the drain electrode of field-effect tube Q1 is connected to by control device；The protection signal output end passes through second resistance R2
Be connected to the base stage of triode Q2, the emitter ground connection of triode Q2, the collector of triode Q2 be connected to first resistor R1 with
Between the grid of field-effect tube Q1；Between the protection signal output end and second resistance R2 is connected with by 3rd resistor R3
Two supply voltage VCC2, alternatively, being connected with the second electricity by 3rd resistor R3 between second resistance R2 and the base stage of triode Q2
Source voltage VCC2.
Further, field-effect tube Q1 is N-channel field-effect tube, and triode Q2 is NPN type triode.
Further, signal generating circuit is by the first supply voltage VCC1 power supply, the first supply voltage VCC1 and described the
Two supply voltage VCC2 are the same supply voltages, or are different supply voltage.
Further, the ground terminal ground connection of signal generating circuit.
A kind of pressure control device, including aforementioned control circuit and air valve or air pump, the protection control of the control circuit
Circuit processed is connect with the air valve or air pump.
A kind of sphygmomanometer, including aforementioned control circuit and sphygmomanometer air pump, the protection control circuit of the control circuit with
Sphygmomanometer air pump connects.
The controling circuit structure that the utility model embodiment proposes is simple and practical, and control is accurate, can effectively avoid because of control
The extremely caused risk of device processed.
Description of the drawings
Fig. 1 is the typical sphygmomanometer air pump driving circuit figure of the prior art；
Fig. 2 is the control circuit block diagram that the utility model embodiment proposes；
Fig. 3 is the first embodiment for the control circuit that the utility model embodiment proposes；
Fig. 4 is the second embodiment for the control circuit that the utility model embodiment proposes.
Specific implementation mode
To make the purpose of this utility model, technical solution and advantage be more clearly understood, below in conjunction with specific embodiment, and
With reference to attached drawing, the utility model is further described.But those skilled in the art know, the utility model is not limited to
Attached drawing and following embodiment.
The utility model embodiment proposes a kind of control circuit, as shown in Fig. 2, being controlled including signal generating circuit and protection
Circuit processed, signal generating circuit have control signal output and protection signal output end, control signal output output control
Signal cs to protection control circuit, protection signal output end output protection signal bs to protection control circuit, protection control circuit
Determine whether control signal cs exports to by control device.That is, when the control signal cs is normal and protection signal bs is normal
When, control signal cs is output to by control device；When the control signal cs exceptions or protection signal bs exceptions, not to
Control signal cs is exported by control device, to avoid undesirable risk from occurring.
Wherein, signal generating circuit is, for example, CPU, MCU, logical device, analog device etc., and composition protects control circuit
The optional self-resistance of device, capacitance, diode, triode, field-effect tube, IGBT pipes, GTO, GTR, logical device, analog device etc.
Device.
The utility model embodiment also proposed a kind of sphygmomanometer, which includes above-mentioned control circuit and sphygmomanometer gas
Pump, the protection control circuit of control circuit are connect with sphygmomanometer air pump.
The utility model embodiment also proposed a kind of pressure control device, including above-mentioned control circuit and air valve or
The protection control circuit of air pump, the control circuit is connect with the air valve or air pump.
The embodiment of control circuit is described below in conjunction with the accompanying drawings.
Embodiment 1：
As shown in figure 3, in the first embodiment of the control circuit of the utility model, signal generating circuit MCU is by first
Supply voltage VCC1 power supplies, the ground terminal ground connection of signal generating circuit MCU, signal generating circuit MCU have control signal output
End and protection signal output end.The control signal output is connected to n-channel depletion field effect transistor by first resistor R1
The grid of Q1, the source electrode ground connection of field-effect tube Q1, the drain electrode of field-effect tube Q1 be connected to such as sphygmomanometer air pump by controller
Part M1.The protection signal output end is connected to the base stage of NPN type triode Q2, NPN type triode Q2 by second resistance R2
Emitter ground connection, the collector of NPN type triode Q2 is connected between first resistor R1 and the grid of field-effect tube Q1, described
Second source voltage VCC2 is connected with by 3rd resistor R3 between protection signal output end and second resistance R2.Sphygmomanometer air pump
M1 is powered by third supply voltage VCC3.First supply voltage VCC1, second source voltage VCC2 and third supply voltage VCC3
It can be the same supply voltage, supply voltage can also be different.
In the control circuit of the utility model first embodiment, first resistor R1, second resistance R2,3rd resistor R3, n
Channel depletion type field-effect tube Q1 and NPN type triode Q2 constitute protection control circuit.When control circuit works normally, protect
The protection signal bs for demonstrate,proving signal generating circuit output is low level.
When control circuit works normally, the protection signal bs of signal generating circuit MCU outputs is low level, NPN type three
Pole pipe Q2 cut-offs.Signal generating circuit MCU output controls signal cs, control signal cs control field-effect tube by first resistor R1
The on and off of Q1.At this point, protecting control circuit not influences to control signal cs normal transmissions to sphygmomanometer air pump M1.
When control circuit operation irregularity, if signal generating circuit MUC resets or program pointer are abnormal, control is typically resulted in
Signal cs processed is identical with the level of protection signal bs.If control signal cs, the protection signal bs of signal generating circuit MCU outputs are equal
For low level, NPN type triode Q2 cut-offs, field-effect tube Q1 cut-offs, then sphygmomanometer air pump M1 does not work, and not will produce risk.
If control signal cs, the protection signal bs of signal generating circuit MCU outputs are high level, NPN type triode Q2 conductings, field effect
Should pipe Q1 cut-off, then sphygmomanometer air pump M1 does not work, and will not generate risk.
Embodiment 2：
In the second embodiment of the control circuit of the utility model, as shown in figure 4, signal generating circuit MCU is by first
Supply voltage VCC1 power supplies, the ground terminal ground connection of signal generating circuit MCU, signal generating circuit MCU have control signal output
End and protection signal output end.The control signal output is connected to n-channel depletion field effect transistor by first resistor R1
The grid of Q1, the source electrode ground connection of field-effect tube Q1, the drain electrode of field-effect tube Q1 be connected to such as sphygmomanometer air pump by controller
Part M1.The protection signal output end is connected to the base stage of NPN type triode Q2, NPN type triode Q2 by second resistance R2
Emitter ground connection, the collector of NPN type triode Q2 is connected between first resistor R1 and the grid of field-effect tube Q1, second
Second source voltage VCC2 is connected with by 3rd resistor R3 between resistance R2 and the base stage of NPN type triode Q2.Sphygmomanometer gas
M1 is pumped to be powered by third supply voltage VCC3.
The operation principle of the control circuit of the utility model second embodiment is identical with the first embodiment, no longer superfluous herein
It states.
It will be understood by those skilled in the art that the control circuit in specific embodiment of the utility model is removed for controlling blood
Outside pressure meter air pump, other can also be controlled by control device；In the above-described embodiments, it removes and uses n-channel depletion field effect transistor
Outside Q1 and NPN type triode, the field-effect tube of other models and triode can also be used to complete switching function.
More than, the embodiment of the utility model is illustrated.But the utility model is not limited to above-mentioned implementation
Mode.Within the spirit and principle of the utility model, any modification, equivalent substitution, improvement and etc. done, should be included in
Within the scope of protection of the utility model.
Claims (10)
1. a kind of control circuit, it is characterised in that：The control circuit include signal generating circuit and protection control circuit,
In, the signal generating circuit has control signal output and protection signal output end, the control signal output output
Signal is controlled to the protection control circuit, the protection signal output end output protection signal to the protection control circuit,
The protection control circuit determines whether to export the control signal according to the control signal and the protection signal.
2. control circuit as described in claim 1, it is characterised in that：Protect control circuit by multiple logical devices and/or mould
Quasi- device composition and/or signal generating circuit are logical device or analog device.
3. control circuit as claimed in claim 2, it is characterised in that：The device of composition protection control circuit is selected from resistance, electricity
Appearance, diode, triode, field-effect tube, IGBT pipes, GTO and GTR.
4. control circuit as claimed in claim 2, it is characterised in that：Signal generating circuit is CPU or MCU.
5. the control circuit as described in one of claim 1-4, it is characterised in that：Protection control circuit include first resistor R1,
Second resistance R2,3rd resistor R3, field-effect tube Q1 and triode Q2,
The control signal output is connected to the grid of field-effect tube Q1 by first resistor R1, and the source electrode of field-effect tube Q1 connects
The drain electrode on ground, field-effect tube Q1 is connected to by control device；
The protection signal output end is connected to the base stage of triode Q2 by second resistance R2, and the emitter of triode Q2 connects
The collector on ground, triode Q2 is connected between first resistor R1 and the grid of field-effect tube Q1；
Second source voltage VCC2 is connected with by 3rd resistor R3 between the protection signal output end and second resistance R2, or
Person is connected with second source voltage VCC2 between second resistance R2 and the base stage of triode Q2 by 3rd resistor R3.
6. control circuit as claimed in claim 5, it is characterised in that：Field-effect tube Q1 is N-channel field-effect tube, triode Q2
For NPN type triode.
7. control circuit as claimed in claim 5, it is characterised in that：Signal generating circuit is supplied by the first supply voltage VCC1
Electricity, the first supply voltage VCC1 and second source voltage VCC2 is the same supply voltage, or is different power supply electricity
Pressure.
8. control circuit as claimed in claim 7, it is characterised in that：The ground terminal of signal generating circuit is grounded.
9. a kind of pressure control device, it is characterised in that：Including control circuit as described in one of claim 1-8 and air valve
Or air pump, the protection control circuit of the control circuit are connect with the air valve or air pump.
10. a kind of sphygmomanometer, it is characterised in that：Including control circuit as described in one of claim 1-8 and sphygmomanometer air pump,
The protection control circuit of the control circuit is connect with sphygmomanometer air pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720417314.0U CN207627310U (en) | 2017-04-19 | 2017-04-19 | Control circuit and sphygmomanometer and pressure control device comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720417314.0U CN207627310U (en) | 2017-04-19 | 2017-04-19 | Control circuit and sphygmomanometer and pressure control device comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207627310U true CN207627310U (en) | 2018-07-20 |
Family
ID=62860729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720417314.0U Active CN207627310U (en) | 2017-04-19 | 2017-04-19 | Control circuit and sphygmomanometer and pressure control device comprising same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207627310U (en) |
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2017
- 2017-04-19 CN CN201720417314.0U patent/CN207627310U/en active Active
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