CN208432885U - Cement soundness test pressure steams kettle digital display instrument circuit - Google Patents
Cement soundness test pressure steams kettle digital display instrument circuit Download PDFInfo
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- CN208432885U CN208432885U CN201821060185.5U CN201821060185U CN208432885U CN 208432885 U CN208432885 U CN 208432885U CN 201821060185 U CN201821060185 U CN 201821060185U CN 208432885 U CN208432885 U CN 208432885U
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Abstract
It is pressed the utility model discloses a kind of cement soundness test and steams kettle digital display instrument circuit, including MCU；MCU includes multiple groups I/O pin；It further include temperature collecting module；The signal input part of temperature collecting module connects temperature sensor；The signal output end of temperature collecting module is connected to first group of I/O pin of MCU；It further include pressure acquisition module；The signal input part of pressure acquisition module connects pressure sensor；The signal output end of pressure acquisition module is connected to second group of I/O pin of MCU；Temperature sensor and pressure sensor are placed into pressure and steam within kettle.The utility model integrates pressure, temperature and the unit of control in this control system, replace two pressure gauges and glass-stem thermometer with digital instrument, instrument is integrated with the function of acquisition, display and the control of pressure and temperature, simplifies the installation, after sale and maintenance of equipment.The security performance of operation is promoted.
Description
Technical field
The utility model relates to electronic circuit fields, and in particular to a kind of cement soundness test pressure steaming kettle digital display instrument electricity
Road.
Background technique
Cement soundness test pressure steams kettle and is suitable for measurement portland cement, ordinary portland cement, slag portland
The main cement type such as cement, Portland pozzolana cement, Portland fly ash cement.
Cement soundness test steams kettle main parts size with pressure and high-quality stainless steel material is mostly used to manufacture, and energy high temperature resistant is high
Press saturated steam.In the prior art, pressure steams the pressure instruction being made of stainless steel there are two dresses on the kettle cover of kettle, a peace
Full valve, two vent valves.Autoclave body is mounted in barrel shell, and there are two adding thermal resistances for outer lower portion dress, for being heated to autoclave body, system
Make vapor；Bottom deferent is connected with electro connecting pressure gauge, and electro connecting pressure gauge and electrical control system cooperate, and being used for will be in kettle
Pressure is controlled in setting range.The top of barrel shell is equipped with venting ring, and lower part is equipped with venting plate, for blocking or opening around autoclave body
Air, exhaust fan is installed in lower part, for terminate test after air draft cooling.
It in the prior art, is that correlation function is realized with pointer instrument and glass-stem thermometer, the survey of measurement structure
Accuracy of measurement is low, and it is inconvenient benefit after sale and to the upgrading of product from being installed to.
Utility model content
In view of the deficiencies of the prior art, it is pressed the utility model discloses a kind of cement soundness test and steams kettle digital display instrument electricity
Road.
The technical solution of the utility model is as follows:
A kind of cement soundness test pressure steaming kettle digital display instrument circuit, including MCU；MCU includes multiple groups I/O pin；Further include
Temperature collecting module；The signal input part of temperature collecting module connects temperature sensor；The signal output end of temperature collecting module
It is connected to first group of I/O pin of MCU；It further include pressure acquisition module；The signal input part of pressure acquisition module connects pressure
Sensor；The signal output end of pressure acquisition module is connected to second group of I/O pin of MCU；Temperature sensor and pressure sensing
Device is placed into pressure and steams within kettle；It further include driving circuit and display circuit；The signal input part of driving circuit is connected to the of MCU
Three groups of I/O pins；The signal input part of display circuit is connected with the signal output end of driving circuit；It further include keyboard circuit,
The signal output end of keyboard circuit is connected to the 4th group of I/O pin of MCU.
Its further technical solution is the model STC12C5A16AD of the MCU.
Its further technical solution is that multiple groups peripheral circuit is also connected on MCU；First peripheral circuit includes 3 points
Formula oscillating circuit；Bikini oscillating circuit include crystal oscillator and with the concatenated first capacitor of crystal oscillator and the second capacitor；The two of crystal oscillator
End is separately connected two external crystal oscillator pins of MCU；Second peripheral circuit includes data storage device；Data storage device and MCU are logical
I2C bus pin is crossed to be connected；Third peripheral circuit is data transmission circuit；Plug connector is connected to the sending data end mouth of MCU
With reception data port.
Its further technical solution is that the temperature collecting module includes the first operational amplifier；It further include mutually going here and there
The first resistor and second resistance of connection, 3rd resistor and the 4th resistance, this series circuit one end ground connection, the other end are connected to first
The normal phase input end of operational amplifier；The positive that the common end of first resistor and second resistance is connected to the first operational amplifier is defeated
Enter to hold, the common end of 3rd resistor and the 4th resistance is connected to MCU as the signal output end of temperature collecting module；It further include phase
Mutual concatenated 5th resistance and the 6th resistance；The output signal of one end connection temperature sensor of this series circuit, the other end connect
Connect the signal output end of the first operational amplifier；The common end of 5th resistance and the 6th resistance connects the anti-of the first operational amplifier
Phase input terminal.
Its further technical solution is that the pressure acquisition module includes second operational amplifier；It further include mutually going here and there
The 7th resistance, the 8th resistance, the 9th resistance and the tenth resistance of connection, the first of one end connection pressure sensor of this series circuit
Output signal, the other end connect the first operating voltage；The common end of 7th resistance and the 8th resistance is connected to the second operation amplifier
The inverting input terminal of device；The common end of 8th resistance and the 9th resistance is connected to the signal output end of second operational amplifier；Also
Including the eleventh resistor and twelfth resistor being serially connected, this series circuit one end connects the second output letter of pressure sensor
Number, the other end is connected to the first operating voltage；The common end of eleventh resistor and twelfth resistor is connected to the second operation amplifier
The normal phase input end of device；It further include the first variable resistance, one end of the first variable resistance connects the 9th resistance and the tenth resistance
Common end, other end ground connection；Signal output end of the adjustable side of first variable resistance as pressure acquisition module, is connected to MCU.
Its further technical solution is that the display circuit is multiple LED charactrons；Eight sections of each LED charactrons
Display lamp pin is connected to MCU；The driving end of multiple LED charactrons is respectively connected to the signal output end of multiple driving circuits；
Driving circuit includes the first triode, and the base stage of the first triode connects MCU；The first work of emitter connection of first triode
Voltage；The driving end of the collector connection LED charactrons of first triode.
Its further technical solution is that the circuit includes multiple key switches；One end of key switch connects MCU,
The other end of key switch is grounded.
Its further technical solution be further include output control circuit；The output control circuit includes optocoupler and
Two triodes；First pin of optocoupler is connected to the first operating voltage, and the second pin of optocoupler connects MCU, and the third of optocoupler is drawn
Foot connects the second operating voltage；4th pin of optocoupler connects the base stage of the second triode；The emitter of second triode N passes through
Thirteenth resistor is connected to the base stage of the second triode.
Its further technical solution be further include power supply circuit；Power supply circuit includes plug connector, reverse phase guarantor
Protection circuit and three terminal regulator；External power supply is connected on plug connector, the output pin connection reverse-phase protection circuit of plug connector
Input terminal, the input terminal of the output end connection three terminal regulator of reverse-phase protection circuit, the output end output services of three terminal regulator
Power supply.
The advantageous effects of the utility model are:
The utility model digital instrumentation replaces the function of original pointer instrument and glass-stem thermometer, pressure,
Temperature and the unit of control integrate in this control system.Replace two pressure gauges and glass-stem thermometer with digital instrument, and
Digital instrument is integrated with the function of acquisition, display and the control of pressure and temperature.Wherein display circuit has used super large superelevation
0.8 inch of bright LED digital-scroll technique, temperature collecting module and pressure acquisition module provide high-precision pressure and temperature sensing
Device acquisition unit.The functional peace for all integrating in a set of controller, can be improved and control precision, simplifying equipment of these institutes
Dress facilitates after sale and safeguards.The convenience and safety of operation are also improved simultaneously.
Detailed description of the invention
Fig. 1 is the system block diagram of the utility model.
Fig. 2 is the circuit diagram of MCU.
Fig. 3 is the schematic diagram of the first peripheral circuit.
Fig. 4 is the schematic diagram of the second peripheral circuit.
Fig. 5 is the schematic diagram of third peripheral circuit.
Fig. 6 is the circuit diagram of temperature collecting module.
Fig. 7 is the circuit diagram of pressure acquisition module.
Fig. 8 is the schematic block diagram of power supply circuit.
Fig. 9 is the circuit diagram of the first power supply.
Figure 10 is the circuit diagram of the second power supply.
Figure 11 is the schematic diagram of display circuit.
Figure 12 is the schematic diagram of driving circuit.
Figure 13 is the schematic diagram of keyboard circuit.
Figure 14 is the schematic diagram of indicating circuit.
Figure 15 is the schematic diagram of output control circuit.
Figure 16 is the schematic diagram of warning circuit.
Specific embodiment
Fig. 1 is the system block diagram of the utility model.As shown in Figure 1, the utility model includes MCU and is connected on MCU
Temperature collecting module, pressure acquisition module, output control circuit, keyboard circuit, driving circuit and warning circuit.Driving circuit
On be also connected with the display circuit that driven circuit is driven.It further include that the power supply electricity of power supply is provided to whole system
Road.
Fig. 2 is the circuit diagram of MCU.As shown in Fig. 2, in the present invention, the model of MCU
STC12C5A16AD。
The signal input part of temperature collecting module connects temperature sensor.The signal output end of temperature collecting module is connected to
First group of I/O pin of MCU.The signal input part of pressure acquisition module connects pressure sensor.The signal of pressure acquisition module
Output end is connected to second group of I/O pin of MCU.Temperature sensor and pressure sensor be connected to pressure steam kettle be controlled unit it
On, the temperature and pressure of kettle is steamed for acquiring pressure.In the embodiment shown in Figure 2, first group of I/O pin draws for the second of MCU
Foot P1.6.The third pin P1.7 that second group of I/O pin is MCU.
The signal input part of driving circuit is connected to the third group I/O pin of MCU.The signal input part of display circuit and drive
The signal output end of dynamic circuit is connected.In the embodiment shown in Figure 2, third group I/O pin is the 18th pin of MCU
P2.0 to the 25th pin P2.7.
The signal output end of keyboard circuit is connected on the 4th group of I/O pin of MCU.In the embodiment shown in Figure 2,
The 40th pin P1.0 to the 44th pin P1.4, the first pin P1.5 that 4th group of I/O pin is MCU.
Further include output control circuit, is connected on the 5th group of I/O pin of MCU.In the embodiment shown in Figure 2,
The 11st pin P3.5, the 5th pin P3.0, the 7th pin P3.1 and the 17th pin P4.0 that 5th group of I/O pin is MCU.
It further include warning circuit, the signal input part of warning circuit is connected on the 6th group of I/O pin of MCU.In Fig. 2
Shown in embodiment, the 8th pin P3.2 that the 6th group of I/O pin is MCU.
It further include power supply circuit, power supply circuit provides working power for whole system.
Multiple peripheral circuits are connected on MCU.
Fig. 3 is the schematic diagram of the first peripheral circuit, as shown in figure 3, the first peripheral circuit includes bikini oscillating circuit, this
Circuit includes crystal oscillator B1 and is separately connected with the concatenated first capacitor C1 of crystal oscillator B1 and the second capacitor C2, the both ends of crystal oscillator B1
The 14th pin XTAL2 and the 15th pin XTAL1 of the external crystal oscillator pin of two of MCU namely MCU, for being provided to MCU
Clock signal.
Fig. 4 is the schematic diagram of the second peripheral circuit.As shown in figure 4, including data storage device IC1, implementation shown in Fig. 4
In example, the model MB85RC04V of data storage device IC1.Data storage device IC1 and MCU passes through I2C bus pin SCL, SDA,
Namely the 12nd pin P3.6, the 13rd pin P3.7 of MCU are connected.
Fig. 5 is the schematic diagram of third peripheral circuit.As shown in figure 5, including the sending data end of the first plug connector J1, MCU
Mouth TXD and the 5th pin P3.0 and the 7th pin P3.1 for receiving data port RXD namely MCU, is connected to the first plug connector
J1 is used for transmission the data of MCU.
Fig. 6 is the circuit diagram of temperature collecting module.As shown in fig. 6, temperature collecting module includes the second plug connector J2.Thermoelectricity
The signal output end of resistance sensor accesses to the second plug connector J2.
Temperature collecting module includes electric bridge bleeder circuit and signal amplification circuit.
Electric bridge bleeder circuit includes the 14th resistance R14 and the 16th resistance R16 being cascaded, this series circuit one
End is connected to the first pin of the second plug connector J2, and the other end is connected to the second pin of the second plug connector J2.It further include mutually going here and there
The both ends of the 17th resistance R17, first diode D1, the 18th resistance R18 and the second diode D2 of connection, this series circuit connect
It connects at the both ends of the 16th resistance R16.It further include the 15th resistance R15, one end of the 15th resistance R15 connects the 18th resistance
The common end of R18 and the second diode D2, the other end connect the third pin of the second plug connector J2.
Using the common end of the second diode D2 and the 15th resistance R15 as the output end of electric bridge bleeder circuit, it is connected to
Signal amplification circuit.
Signal amplification circuit includes the first operational amplifier IC2.It further include the first resistor R1 being serially connected, second resistance
R2,3rd resistor R3 and the 4th resistance R4, this series circuit one end ground connection, the other end are connected to the first operational amplifier IC2's
Signal output end.The common end of first resistor R1 and second resistance R2 are connected to the normal phase input end of the first operational amplifier IC2,
The common end of 3rd resistor R3 and the 4th resistance R4 are connected to MCU as the signal output end PT100-IN of temperature collecting module.
It further include the 5th resistance R5 and the 6th resistance R6 being serially connected.One end of this series circuit passes through electric bridge bleeder circuit connection temperature
The output signal of sensor is spent, the other end connects the signal output end of the first operational amplifier IC2.The electricity of 5th resistance R5 and the 6th
The common end for hindering R6 connects the inverting input terminal of the first operational amplifier IC.
Wherein 3rd resistor R3 and the 4th resistance R4 plays the role of current limliting and pull-up partial pressure.
First resistor R1, second resistance R2, the 5th resistance R5 and the 6th resistance R6 play the work of current limliting and signal amplification
With.
The one end third capacitor C3 and the 4th capacitor C4, third capacitor C1 is connected to one end of first resistor R1, and the other end connects
It is connected to one end of the 5th resistance R5.4th both ends capacitor C4 be connected to the first operational amplifier IC2 normal phase input end and
Inverting input terminal.Third capacitor C3 and the 4th capacitor C4 play filter action.
It further include the series circuit and the electricity of the second electrolytic capacitor E2 and the 20th of the first electrolytic capacitor E1 and the 19th resistance
The series circuit of resistance is connected between ground terminal and first resistor R1, plays the role of current limliting and filtering.
Fig. 7 is the circuit diagram of pressure acquisition module.As shown in fig. 7, comprises third plug connector J3, the signal of pressure sensor
Output end is connected on third plug connector J3.
The signal output end of pressure sensor is connected on third plug connector J3.Pressure acquisition module includes the second operation
Amplifier IC3.It further include the 7th resistance R7, the 8th resistance R8, the 9th resistance R9 and the tenth resistance R10 being serially connected, this string
Join the first output signal IN1- of one end connection pressure sensor of circuit, the other end connects operating voltage+5VM.7th resistance
The common end of R7 and the 8th resistance R8 are connected to the inverting input terminal of second operational amplifier IC3.The electricity of 8th resistance R8 and the 9th
The common end of resistance R9 is connected to the signal output end of second operational amplifier IC3.It further include the eleventh resistor R11 being serially connected
With twelfth resistor R12, this series circuit one end connects the second output signal IN1+ of pressure sensor, and the other end is connected to work
Make voltage+5VM.The common end of eleventh resistor R11 and twelfth resistor R12 are connected to the positive of second operational amplifier IC3
Input terminal.It further include one end connection the 9th resistance R9 and the tenth resistance R10 of the first variable resistance RW1, the first variable resistance RW1
Common end, the other end ground connection.Signal output end AD-IN of the adjustable side of first variable resistance RW1 as pressure acquisition module,
It is connected to the third pin of MCU.First variable resistance RW1 plays the full effect of pressure tune.
The effect of tenth resistance R10 is pressure input voltage pull-up partial pressure.It further include the 5th electrolytic capacitor E5, one end connection
In the common end of the 9th resistance R9 and the tenth resistance R10, other end ground connection plays filter action.
It is also parallel with the 8th capacitor C8 at the 8th both ends resistance R8, plays balanced action.
Further include the second adjustable resistance RW2 shown in Fig. 7, play the role of pressure zeroing.
Circuit shown in Fig. 7 further includes multiple capacitors: the 5th capacitor C5, the 6th capacitor C6, the 7th capacitor C7, as absorption
Capacitor.
Fig. 8 is the schematic block diagram of power supply circuit.As shown in figure 8, power supply circuit includes plug connector, reverse-phase protection
Circuit and three terminal regulator.
External power supply is connected on plug connector, the input terminal of the output pin connection reverse-phase protection circuit of plug connector, reverse phase
Protect the input terminal of the output end connection three terminal regulator of circuit, the work electricity of the output end output whole system of three terminal regulator
Source.If the working power of system has multiple, multiple power supply circuits can be set.Reverse-phase protection circuit is in parallel
Forward diode and backward dioded.It prevents because of the reversed damage circuit of power supply.
Fig. 9 is the circuit diagram of the first power supply.As shown in figure 9, external power supply is connected on plug connector J2.Diode
D3, diode D4, diode D5, diode D6 are connected as reverse-phase protection circuit as shown in Figure 9.Three terminal regulator M1 output+5VM
Voltage, the first three terminal regulator M3 output -5VM voltage.
Figure 10 is the circuit diagram of the second power supply.As shown in Figure 10, external power supply is connected on plug connector J5.Two poles
Pipe D7, diode D8, diode D9 and diode D10 are connected as reverse-phase protection circuit, the second three terminal regulator M2 output+5V-
MCU voltage.
Figure 11 is the schematic diagram of display circuit.As shown in figure 11, display circuit is multiple LED charactrons.Each LED is digital
Eight sections of display lamp pins of pipe are respectively connected to the 30th pin P0.7 to the 37th pin P0.0 of MCU.Multiple LED are digital
The driving end BB of pipe is respectively connected to the signal output end of multiple driving circuits.It altogether include nine LED charactrons in the present embodiment.
Figure 12 is the schematic diagram of driving circuit.As shown in figure 12, driving circuit includes the first triode P of positive-negative-positive, and first
The 18th pin P2.0 to the 25th pin P2.7, the 9th pin P3.3 or the tenth of the base stage connection MCU of triode P draws
Any one pin in foot P3.4.It include altogether ten driving circuits in the present embodiment, so the triode in ten driving circuits
Base stage and the pin of above-mentioned MCU connect one to one.Emitter connection+5V the voltage of first triode.The collection of first triode
The driving end BB of electrode connection LED charactrons.The first driving circuit to the 9th driving circuit in ten driving circuits drives respectively
Move nine LED charactrons.
Figure 13 is the schematic diagram of keyboard circuit.As shown in figure 13, keyboard circuit includes six press keys switch S1~S6, and six
One end of key switch S1~S6 is separately connected the 40th pin P1.0 to the 44th pin P1.4, the first pin of MCU
The other end of P1.5, six press keys switch S1~S6 are grounded.
Figure 14 is the schematic diagram of indicating circuit.As shown in figure 14, indicating circuit includes four light emitting diode L1~L4, and four
The cathode of a light emitting diode L1~L4 is separately connected the 34th pin P0.3 to the 37th pin P0.0 of MCU, and four
The driving end of anode the tenth driving circuit of connection of light emitting diode L1~L4.The effect of indicating circuit shown in Figure 14 is corresponding
Each working status indication effect.
Figure 15 is the schematic diagram of output control circuit.As shown in figure 15, output control circuit includes optocoupler IC4 and NPN type
The second triode N.The first pin of optocoupler IC4 is connected to+5V voltage, and the second pin of optocoupler IC4 connects the 11st of MCU the
Pin P3.5, the 5th pin P3.0, the 7th pin P3.1 or the 17th pin P4.0.The third pin connection of optocoupler IC4+
12V voltage, the 4th pin of optocoupler IC4 connect the base stage of the second triode N.The emitter of second triode N passes through resistance R26
It is connected to the base stage of triode N.It further include relay RX1, the effect of relay RX1 is electromagnetic switch, controls corresponding output
Circuit is started to work.
The utility model includes four output control circuits, the second pin point of the optocoupler in four output control circuits altogether
Do not connect one to one the 11st pin P3.5 of MCU, the 5th pin P3.0, the 7th pin P3.1 or the 17th pin
P4.0.The effect of output control circuit is control heating, the output such as fan and alarm.
Figure 16 is the schematic diagram of warning circuit.As shown in figure 16, warning circuit includes buzzer FD1, third transistor P1,
The grounded collector of third transistor P1；The signal input part of the emitter connection buzzer FD1 of third transistor P1, the three or three
The 8th pin P3.2 of the base stage connection MCU of pole pipe P1.
Above-described is only preferred embodiments of the present invention, and the utility model is not limited to above embodiments.It can
To understand, what those skilled in the art directly exported or associated under the premise of not departing from the spirit and design of the utility model
Oher improvements and changes are considered as being included within the scope of protection of this utility model.
Claims (9)
1. a kind of cement soundness test pressure steams kettle digital display instrument circuit, which is characterized in that including MCU；MCU includes that multiple groups I/O draws
Foot；It further include temperature collecting module；The signal input part of temperature collecting module connects temperature sensor；The letter of temperature collecting module
Number output end is connected to first group of I/O pin of MCU；It further include pressure acquisition module；The signal input part of pressure acquisition module
Connect pressure sensor；The signal output end of pressure acquisition module is connected to second group of I/O pin of MCU；Temperature sensor and
Pressure sensor is placed into pressure and steams within kettle；It further include driving circuit and display circuit；The signal input part of driving circuit connects
In the third group I/O pin of MCU；The signal input part of display circuit is connected with the signal output end of driving circuit；Further include
Keyboard circuit, the signal output end of keyboard circuit are connected to the 4th group of I/O pin of MCU.
2. cement soundness test pressure as described in claim 1 steams kettle digital display instrument circuit, which is characterized in that the type of the MCU
Number be STC12C5A16AD.
3. cement soundness test pressure as described in claim 1 steams kettle digital display instrument circuit, which is characterized in that also connect on MCU
It is connected to multiple groups peripheral circuit；First peripheral circuit includes bikini oscillating circuit；Bikini oscillating circuit include crystal oscillator and with
The concatenated first capacitor of crystal oscillator and the second capacitor；The both ends of crystal oscillator are separately connected two external crystal oscillator pins of MCU；Second periphery
Circuit includes data storage device；Data storage device is connected with MCU by I2C bus pin；Third peripheral circuit is data biography
Transmission of electricity road；Plug connector is connected to the sending data end mouth of MCU and receives data port.
4. cement soundness test pressure as described in claim 1 steams kettle digital display instrument circuit, which is characterized in that the temperature acquisition
Module includes the first operational amplifier；It further include the first resistor being serially connected and second resistance, 3rd resistor and the 4th resistance,
This series circuit one end ground connection, the other end are connected to the normal phase input end of the first operational amplifier；First resistor and second resistance
Common end be connected to the normal phase input end of the first operational amplifier, the common end of 3rd resistor and the 4th resistance is adopted as temperature
The signal output end of collection module is connected to MCU；It further include the 5th resistance and the 6th resistance being serially connected；The one of this series circuit
The output signal of end connection temperature sensor, the other end connect the signal output end of the first operational amplifier；5th resistance and
The common end of six resistance connects the inverting input terminal of the first operational amplifier.
5. cement soundness test pressure as described in claim 1 steams kettle digital display instrument circuit, which is characterized in that the pressure acquisition
Module includes second operational amplifier；It further include the 7th resistance, the 8th resistance, the 9th resistance and the tenth resistance being serially connected,
First output signal of one end connection pressure sensor of this series circuit, the other end connect the first operating voltage；7th resistance
The inverting input terminal of second operational amplifier is connected to the common end of the 8th resistance；The common end of 8th resistance and the 9th resistance
It is connected to the signal output end of second operational amplifier；It further include the eleventh resistor and twelfth resistor being serially connected, this string
Join the second output signal of circuit on one side connection pressure sensor, the other end is connected to the first operating voltage；Eleventh resistor and
The common end of twelfth resistor is connected to the normal phase input end of second operational amplifier；It further include the first variable resistance, first can
One end of power transformation resistance connects the common end of the 9th resistance and the tenth resistance, other end ground connection；Make the adjustable side of first variable resistance
For the signal output end of pressure acquisition module, it is connected to MCU.
6. cement soundness test pressure as described in claim 1 steams kettle digital display instrument circuit, which is characterized in that the display circuit
For multiple LED charactrons；Eight sections of display lamp pins of each LED charactrons are connected to MCU；The driving end of multiple LED charactrons
It is respectively connected to the signal output end of multiple driving circuits；Driving circuit includes the first triode, and the base stage of the first triode connects
Meet MCU；The emitter of first triode connects the first operating voltage；The drive of the collector connection LED charactrons of first triode
Moved end.
7. cement soundness test as described in claim 1 pressure steams kettle digital display instrument circuit, which is characterized in that the circuit includes
Multiple key switches；One end of key switch connects MCU, the other end ground connection of key switch.
8. cement soundness test pressure as described in claim 1 steams kettle digital display instrument circuit, which is characterized in that further include output control
Circuit processed；The output control circuit includes optocoupler and the second triode；First pin of optocoupler is connected to the first operating voltage,
The second pin of optocoupler connects MCU, and the third pin of optocoupler connects the second operating voltage；The 4th pin connection the two or three of optocoupler
The base stage of pole pipe；The emitter of second triode N is connected to the base stage of the second triode by thirteenth resistor.
9. cement soundness test pressure as described in claim 1 steams kettle digital display instrument circuit, which is characterized in that further include power supply electricity
Source circuit；Power supply circuit includes plug connector, reverse-phase protection circuit and three terminal regulator；External power supply is connected to plug connector
On, the input terminal of the output pin connection reverse-phase protection circuit of plug connector, the output end of reverse-phase protection circuit connects three-terminal voltage-stabilizing
The input terminal of device, the output end output power supply of three terminal regulator.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821060185.5U CN208432885U (en) | 2018-07-06 | 2018-07-06 | Cement soundness test pressure steams kettle digital display instrument circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821060185.5U CN208432885U (en) | 2018-07-06 | 2018-07-06 | Cement soundness test pressure steams kettle digital display instrument circuit |
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| CN201821060185.5U Expired - Fee Related CN208432885U (en) | 2018-07-06 | 2018-07-06 | Cement soundness test pressure steams kettle digital display instrument circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117007416A (en) * | 2023-09-21 | 2023-11-07 | 常州市建筑材料研究所有限公司 | Safe cement pressure testing machine |
| CN117415931A (en) * | 2023-11-01 | 2024-01-19 | 泰州华航精密铸造有限公司 | Novel cement brick maintenance control device |
-
2018
- 2018-07-06 CN CN201821060185.5U patent/CN208432885U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117007416A (en) * | 2023-09-21 | 2023-11-07 | 常州市建筑材料研究所有限公司 | Safe cement pressure testing machine |
| CN117007416B (en) * | 2023-09-21 | 2023-12-08 | 常州市建筑材料研究所有限公司 | Safe cement pressure testing machine |
| CN117415931A (en) * | 2023-11-01 | 2024-01-19 | 泰州华航精密铸造有限公司 | Novel cement brick maintenance control device |
| CN117415931B (en) * | 2023-11-01 | 2024-04-26 | 泰州华航精密铸造有限公司 | Cement brick maintenance control device |
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