CN206756921U - Proportioning valve signal tester - Google Patents
Proportioning valve signal tester Download PDFInfo
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- CN206756921U CN206756921U CN201720337560.5U CN201720337560U CN206756921U CN 206756921 U CN206756921 U CN 206756921U CN 201720337560 U CN201720337560 U CN 201720337560U CN 206756921 U CN206756921 U CN 206756921U
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Abstract
The utility model provides a kind of proportioning valve signal tester, including circuit, external signal amplitude limiter circuit, enable signal control circuit, voltage signal measurement display circuit, current signal measurement display circuit, switch method of remote signal circuit and external electrical interface occur for potentiometer regulation circuit, signal zero-bit and Type Control circuit, voltage signal generation circuit, current signal.The switch method of remote signal circuit includes local/remote signal behavior toggle switch, instruction/monitoring selection toggle switch, first voltage/current signal selection toggle switch, second voltage/current signal selection toggle switch and common/open loop _ I selecting switch；The utility model can design for all kinds of proportioning valve field adjustables, and dependable performance, volume is light and handy, easy to carry.
Description
Technical field
Ratio valve test is the utility model is related to, in particular it relates to a kind of proportioning valve signal tester.
Background technology
In hydraulic pressure drive control system industrial circle, proportioning valve is a kind of modern emerging hydraulic pressure drive control system element.It is current
Collection hydraulic pressure, machinery, electronics, a kind of high-tech product for the multinomial industrial technology technology such as automatically controlling, in actual application,
For general operation personnel and engineers and technicians, it is desirable to which it is not one easy skillfully to grasp this technical products
Thing.Particularly the commissioning phase of equipment, the working condition and quick diagnosis failure of energy accurate judgement proportioning valve are former at the scene
Cause, it is a job quite with challenge.
According to investigating at present, the debugging apparatus that there are similar functions in the manufacturer of some external manufacture proportioning valves is supplied to use
Family, but functional single applicable surface is narrow (product type for being only applicable to oneself company series), or function setting complexity scene makes
With inconvenient directly perceived, or the problems such as volume heaviness is not portable.Such as there is a debugging in certain external proportioning valve manufacturer
Device, but function is fairly simple, only electric current, the sender of voltage signal and signal handoff functionality, but without coherent signal
On-line measurement display device, it is impossible to the number of online command signal or valve element monitoring signals during measurement displaying ratio valve work directly perceived
Value.When field adjustable user judges proportioning valve working condition, due to the instruction directly perceived of no related data, this is at the scene
Debugging engineers and technicians want rapidly and accurately failure judgement reason and bring certain obstacle.It is also inadequate that wiring is debugged at the scene
Flexibly and easily.Although the debugging apparatus function setting of some companies is more complete, various signal senders, measurement, display device one
Should be various, but complex operation wiring difficulty is not easy to use, the big heaviness of volume is not portable, fear of throwing is afraid of that touching shaky, cost holds high
Your cost is high, brings many inconvenience to field adjustable work, the analysis for being not only unfavorable for field failure judges, gives engineering skill on the contrary
Art personnel cause the trouble of actual use.In view of the problem of prior art products, inventor combines to be run into respectively in real work
Kind is difficult to devise the utility model device with the working experience summarized for a long time, exploitation, and conveniently and effectively solving scene makes
Various problems.
Utility model content
For in the prior art the defects of, the purpose of this utility model is to provide a kind of proportioning valve signal tester.
According to proportioning valve signal tester provided by the utility model, including potentiometer regulation circuit, signal zero-bit and class
Circuit, external signal amplitude limiter circuit, enable signal control electricity occur for type control circuit, voltage signal generation circuit, current signal
Road, voltage signal measurement display circuit, current signal measurement display circuit, switch method of remote signal circuit and external electrical connect
Mouthful；
Wherein, the input of the potentiometer regulation circuit is connected with the output end of signal zero-bit and Type Control circuit；
The input of the voltage signal generation circuit is connected with the output end of potentiometer regulation circuit, output end connection signal switching control
The first input end of circuit processed；The input that circuit occurs for the current signal is connected with the output end of potentiometer regulation circuit,
Second input of output end and switch method of remote signal circuit；
The input of the external signal amplitude limiter circuit is connected with external electrical interface, and output end passes through switch method of remote signal
The tested proportioning valve binding post of circuit connection；The input of the enable signal control circuit is connected with external electrical interface, defeated
Go out end and export enable signal to tested proportioning valve binding post；The current signal measurement display circuit, the voltage signal are surveyed
Measure the output end of the input connection switch method of remote signal circuit of display circuit.
Preferably, the switch method of remote signal circuit includes local/remote signal behavior toggle switch, instruction/monitoring choosing
Select toggle switch, first voltage/current signal selection toggle switch, second voltage/current signal selects toggle switch and general
Logical/open loop _ I selecting switch；
Wherein, output end connection first voltage/current signal of the voltage signal generation circuit selects toggle switch
First input end；The of output end connection first voltage/current signal selection toggle switch of circuit occurs for the current signal
Two inputs；
The output end connection local/remote signal behavior toggle switch of first voltage/current signal selection toggle switch
First input end；The second of the output end connection local/remote signal behavior toggle switch of the external signal amplitude limiter circuit is defeated
Enter end；The first input end of the output end link order of local/remote signal behavior toggle switch/monitoring selection toggle switch,
Tested proportioning valve binding post；
The output end of the instruction/monitoring selection toggle switch connects the voltage signal measurement display circuit, the electricity
Flow the input of signal measurement display circuit；
First output end of the common/open loop _ I selecting switch connects the first voltage/current signal selection button
3rd input of switch, the input of the second output end connection second voltage/current signal selection toggle switch；
The power control terminal of the voltage signal measurement display circuit is linked into second voltage/current signal selection button and opened
The first output end closed；
The power control terminal of the current signal measurement display circuit is linked into second voltage/current signal selection button and opened
The second output end closed.
Preferably, potentiometer regulation circuit include the turn knob potentiometer being installed on panel and with turn knob potentiometer phase
Reference voltage-stabilizing circuit even, input and the signal zero-bit and the output end phase of Type Control circuit of the reference voltage-stabilizing circuit
Even, circuit, the input of the voltage signal generation circuit occur for output end connection current signal.
Preferably, the signal zero-bit and Type Control circuit, including be installed on panel signal zero-bit toggle switch,
Switch method of remote signal relay and mono-/bis-polar selecting switch；
The mono-/bis-polar selecting switch connects the switch method of remote signal relay by signal zero-bit toggle switch
Control terminal；
The turn knob potentiometer accesses the switching circuitry of the switch method of remote signal relay.
Preferably, the voltage signal generation circuit, including operational amplifier A 1, resistance R5, resistance R8, resistance R9 and
Return to zero semifixed resistor PT1；
Wherein, the output end of the in-phase input end connection of the operational amplifier A 1 potentiometer regulation circuit is connected；
Resistance R5 one end ground connection, the other end connect the inverting input of the operational amplifier A 1；
Resistance R9 one end connects the output end of the operational amplifier A 1, other end connection switch method of remote signal circuit
First input end；Resistance R8 one end connects the output end of the operational amplifier A 1, the other end connection resistance R8 other end；
Zeroing semifixed resistor PT1 both ends connect two zeroing ends of the operational amplifier A 1, sliding end connection respectively
The negative pole end of operational amplifier A 1.
Preferably, circuit occurs for the current signal, including operational amplifier A 2, Current amplifier triode Q1, resistance R1,
Resistance R2, resistance R3, resistance R4, resistance R10, resistance R11, resistance R12, electric capacity C13 and zeroing semifixed resistor PT2；
Wherein, on the one hand the in-phase input end of the operational amplifier A 2 adjusts electricity by the resistance R2 connections potentiometer
The output end on road is connected, another aspect resistance R3 connection Ref power ends；Resistance R1, resistance R4 one end ground connection, other end connection
The inverting input of the operational amplifier A 2；
Current amplifier triode Q1 base stage connects the output end of the operational amplifier A 2, and emitter stage passes through resistance R12
Connect the second input of switch method of remote signal circuit, colelctor electrode concatenation operation amplifier A2 positive terminal；Resistance R10 one end
Connect the second input of switch method of remote signal circuit, other end concatenation operation amplifier A2 in-phase input end；Resistance R11's
One end connection Current amplifier triode Q1 emitter stage, other end concatenation operation amplifier A2 inverting input；Resistance R11's
One end concatenation operation amplifier A2 output end, other end concatenation operation amplifier A2 inverting input
Zeroing semifixed resistor PT2 both ends connect two zeroing ends of the operational amplifier A 2, sliding end connection respectively
The negative pole end of operational amplifier A 2.
Preferably, the external signal amplitude limiter circuit, including diode D6, diode D8, diode D5 and diode
D7；
Wherein, diode D6 positive pole, diode D5 positive pole connect the first cathode power supply end；Diode D8 negative pole,
Diode D7 negative pole connects the first negative electricity source；
Diode D6 negative pole connection diode D8 positive pole；Diode D5 negative pole connection diode D7 positive pole.
Preferably, the enable signal control circuit, which includes being arranged on panel, controls enable signal toggle switch, current limliting
Protection device, the green LED lamp as state instruction, resistance R15, socket P2 and socket P1；
Wherein, one end connection control enable signal toggle switch of the socket P2, the first connection jaws of the other end pass through
Current-limiting protection/protective parts connect the second cathode power supply end；Second connection jaws of the other end of the socket P2 are connected by resistance R15
First connection jaws of socket P1 one end, the second connection jaws ground connection of socket P1 one end；
The positive pole of the first connection jaws connection green LED lamp of the other end of the socket P1, the negative pole connection of green LED lamp
Second connection jaws of the other end of the socket P1.
Preferably, voltage signal measurement display circuit, including liquid crystal digital voltmeter on panel and the
One direct current insulating power supply modular converter；
The input connection voltage/current selection control output end of the first DC-isolation power transfer module, output
End connects the liquid crystal digital voltmeter；
The output end connection liquid crystal digital electricity of the instruction of the switch method of remote signal circuit/monitoring signals control switching circuit
Press table；
Voltage signal measures display circuit and is connected in parallel in the presence of switch method of remote signal circuit with test line formation,
To measure display voltage signal values；
The current signal measures display circuit, including liquid crystal digital ammeter on panel and the second direct current every
From power transfer module；
The input connection voltage/current selection control output end of the second DC-isolation power transfer module, output
End connects the liquid crystal digital ammeter；The instruction of the switch method of remote signal circuit/monitoring signals control switching circuit it is defeated
Go out end connection liquid crystal digital ammeter；
Current signal measures display circuit and is connected in series in the presence of switch method of remote signal circuit with test line formation,
To measure display current signal value.
Preferably, the external electrical interface includes the core socket of standard 7, power supply terminal, proportioning valve binding post；
The tested proportioning valve binding post of power supply terminal connection of the power supply terminal, the core socket of standard 7；
The signal terminal of the core socket of standard 7 connects local/remote signal behavior button by external signal amplitude limiter circuit
Second input of sub switch.
Compared with prior art, the utility model has following beneficial effect：
1st, the utility model can design for all kinds of proportioning valve field adjustables, and dependable performance, volume is light and handy, carrying side
Just；
2nd, the utility model manually knob control can produce 0-10V, the accurate signal of ± 10V, 4-20mA；
3rd, the utility model has single, double polar signal handoff functionality；
4th, the double LCD digital watches of voltage of the present utility model, current strap backlight show that display is clear soft；
5th, the utility model can switch local, remote signaling online, easily tackle field adjustable；
6th, the utility model can Real time displaying integrated amplifier proportioning valve input signal or monitoring feedback signal, sentence rapidly
Disconnected proportioning valve working condition；
7th, the utility model band signal zero setting switching switch, 0V voltage zero-signals, 4mA unipolarities electricity conveniently can accurately be produced
Zero-signal is flowed, 12mA Bipolar current zero-signals, live proportioning valve zero adjustment can be facilitated to debug；
8th, the utility model can manual enable signal activation function, facilitate the debugging with enable signal proportioning valve；
9th, the utility model is internally integrated proportioning valve power supply EMC electromagnetic interferences suppression system, power supply fuse and fusing and referred to
The function such as show, improve the reliability that field adjustable uses；
10th, the utility model has rapid inserting type Functional Design, can be connected to seven core plugs for being connected to proportioning valve originally
Tester socket, seven core plugs of tester are connected on tested proportioning valve, you can realize all on-line test function.
Brief description of the drawings
By reading the detailed description made with reference to the following drawings to non-limiting example, other spies of the present utility model
Sign, objects and advantages will become more apparent upon：
(a), (b), (c), (d) collectively illustrate housing design layout of the present utility model in Fig. 1；
Fig. 2 is structural principle circuit diagram of the present utility model；
Fig. 3 is circuit diagram of the present utility model；
Fig. 4 is the schematic diagram that potentiometer adjusts circuit in the utility model；
Fig. 5 is the schematic diagram of signal zero-bit and Type Control circuit in the utility model；
Fig. 6 is the schematic diagram that circuit occurs for current signal in the utility model；
Fig. 7 is the schematic diagram of voltage signal generation circuit in the utility model；
Fig. 8 is the schematic diagram that first voltage/current signal selects toggle switch in the utility model；
Fig. 9 is the schematic diagram of enable signal control circuit in the utility model；
Figure 10 is the schematic diagram of fuse wire and failure indicating circuit in the utility model；
Figure 11 is the schematic diagram of outside signal limiter circuit in the utility model；
Figure 12 is the schematic diagram of socket, power switch and EMC filter circuits in the utility model；
Figure 13 is the schematic diagram of local/remote signal behavior toggle switch in the utility model；
Figure 14 is the schematic diagram that voltage signal measures display circuit in the utility model；
Figure 15 is the schematic diagram of DC power voltage stabilizing circuit in the utility model；
Figure 16 is the schematic diagram that second voltage/current signal selects toggle switch in the utility model；
Figure 17 is the schematic diagram that instruction/monitoring selects toggle switch in the utility model；
Figure 18 is the schematic diagram that current signal measures display circuit in the utility model；
Figure 19 is the schematic diagram of switch method of remote signal circuit in the utility model；
In figure：1 is the core socket of proportioning valve standard 7, for accessing field power supply and external demand signal；2 be tested valve electricity
Cable binding post, the flexible tested proportioning valve of connection debugging；3 be power switch, during for field adjustable, break-make 24V direct currents
Power supply；4 be long-range/local toggle switch, for switching tested proportioning valve command signal source；5 be that instruction/monitoring button is opened
Close, signal item-function is shown for handover measurement；6 be voltage/current toggle switch, for switching local command signal and survey
Measure the type of display；7 be regulation/zero setting toggle switch, for switching the state of local command signal；8 be enabled/button release
Switch, for controlling the state of enable signal manually；9 be precision potentiator knob, straight for adjusting local command signal manually
Stream output；10 be external power supply binding post, flexible to connect 24V DC power supplies；12 be that the selection of mono-/bis-polarity is opened
Close, for selecting the polarity scope of local command signal；13 be common/open loop _ I selecting switch, for selection instruction signal with
The matching relationship of monitoring signal type；101 be that potentiometer adjusts circuit；102 be signal zero-bit and Type Control circuit；103 are
Circuit occurs for current signal；104 be voltage signal generation circuit；105 be that first voltage/current signal selects toggle switch；106
For enable signal control circuit；107 be fuse wire and failure indicating circuit；108 be external signal amplitude limiter circuit；109 are
Socket, power switch and EMC filter circuits；110 be local/remote signal behavior toggle switch；111 be that voltage signal measures
Display circuit；112 be DC power voltage stabilizing circuit；113 be that second voltage/current signal selects toggle switch；114 for instruction/
Monitoring selection toggle switch；115 be that current signal measures display circuit；116 be switch method of remote signal circuit.
Embodiment
The utility model is described in detail with reference to specific embodiment.Following examples will be helpful to this area
Technical staff further understands the utility model, but does not limit the utility model in any form.It should be pointed out that to ability
For the those of ordinary skill in domain, without departing from the concept of the premise utility, various modifications and improvements can be made.
These belong to the scope of protection of the utility model.
In order to realize the function of the utility model patent and feature, the present embodiment is carried out from housing and circuit two parts respectively
Design.
First, housing parts design (as shown in Figure 1)
The utility model design philosophy is to have fully demonstrated the choosing comprehensively of succinct, practical, economic three basic sides
Consider and design.Therefore the various pieces of product are not simple accumulation relations, but the relation to organically blend each other.
From product appearance and operating function, the utility model device is the cuboid standard type engineering by small volume
Basic structure of the plastic casing as product.Generous using such shell product tailored appearance, in light weight, small volume is easy to take
Band, the firm not fear of throwing of structure, dimensional standard easily buying need not mold, low cost, handling ease the features such as.
In the present embodiment, the positive upper row of housing is left and right to be respectively arranged with 2 pieces of voltage, electric current digital panel meters；Under
Row, which is uniformly distributed, is provided with long-range/local, instruction/monitoring, voltage/current, regulation/zero setting, enabled/5 toggle switch of release
For major function handover operation；Lower row is additionally provided with the command signal that a potentiometer knob is used to adjust local sender；Shell
Body front is additionally provided with red and green two LEDs, red instruction fuse malfunction, green instruction enable signal shape
State.
In the present embodiment, the housing left surface is provided with a proportioning valve standard core electric interfaces socket 7, for scene
Quick connection proportioning valve electric signal plug, the core electric interfaces socket 7 is the proportioning valve general-purpose interface of international standard, industry
The most of proportioning valves in field all use this 7 core interface, and pin definitions are substantially all compatible.Design this jack interface
Purpose is：The electric connector for being connected to debugged proportioning valve originally can be switched to be connected to the utility model tester at the scene
On, and the 7 core cable plugs drawn on the utility model tester are replaced being connected on debugged proportioning valve, do not have to again so
Connect any circuit connection, you can the monitoring of on-site signal is realized using the 24V power supplys in script electric connector and control signal
And debugging function, it is achieved thereby that quickly and easily functional characteristics.
In the present embodiment, the housing right flank is provided with a power switch, for the utility model tester and by
Survey the break-make control of proportioning valve 24V power supplies.A simple power switch is set but to play on signal tester important
Safety effect and convenient operating function.Uncertain failure and unexpected feelings can be usually encountered in debugging process at the scene
Condition, the hydraulic mechanism of tested proportional valve control is made dangerous play out of control occur sometimes, it is exactly one to turn off power supply in time
The effectively safety measure of kind.The variation phenomenon of hydraulic system, can facilitate sometimes when switching power supply additionally by contrast
Whether failure judgement is caused due to electric.It is reported that similar external product of the present utility model is but not provided with such one
Individual important power switch.
In the present embodiment, the housing upper side is provided with mono-/bis-polarity, common/two switching switches of open loop _ I are used for
Setting signal type and monitoring miscellaneous function, and a quick plug terminal and one being used for being tested proportioning valve electrical connection
The individual quick plug terminal for the connection of outside 24V power supplys.Due to needing the dexterity of consideration product appearance and the letter of panel operation
Bright feature, kept left the position on side so seldom using miscellaneous function toggle switch by two and being arranged on housing upper side.And housing
Upper side keep right side two groups of terminal designs into the flexibility for quickly patching form and can increasing the utility model product and using.When
When tested proportioning valve is using external amplifier or the situation of the other wiring of needs, quick plug terminal provides a kind of convenient
The flexible mode of connection uses.
2nd, circuit part designs (as shown in Figure 2)
The utility model is a kind of proportioning valve signal tester, including：Potentiometer regulation circuit, signal zero-bit and type control
Circuit, external signal amplitude limiter circuit, enable signal control circuit, electricity occur for circuit processed, voltage signal generation circuit, current signal
Signal measurement display circuit, current signal measurement display circuit, switch method of remote signal circuit, external electrical interface are pressed, wherein：
The potentiometer adjusts circuit, and its input is connected with the output end of signal zero-bit and Type Control circuit；
The voltage signal generation circuit, its input and potentiometer regulation circuit output end be connected, its output end and
Switch method of remote signal circuit is connected；
Circuit occurs for the current signal, and its input is connected with the output end of potentiometer regulation circuit, its output end and
Switch method of remote signal circuit is connected；
The external signal amplitude limiter circuit, its input are connected with external electrical interface, the other end and switch method of remote signal
Circuit is connected；
The enable signal control circuit, its input are connected with external electrical interface, output end export enable signal to
Tested proportioning valve binding post；
Voltage signal measurement display circuit and current signal the measurement display circuit, voltage signal measurement display circuit exist
Formed in the presence of switch method of remote signal circuit with test line and be connected in parallel detection voltage.Current signal measurement display circuit exists
Formed in the presence of switch method of remote signal circuit with test line and be connected in series detection electric current.
In the present embodiment, the potentiometer adjusts circuit, comprising a manual knob potentiometer being installed on panel and
The reference voltage-stabilizing circuit being connected with turn knob potentiometer, the reference voltage-stabilizing circuit provide stable accurate positive and negative for turn knob potentiometer
The reference voltage-stabilizing circuit of reference voltage, stablize accurate manual test signal to provide.Due to consideration that signal used is steady
Qualitative and accuracy requirement, it is specially provided with the positive and negative polarity reference voltage being made up of two accurate benchmark integrated regulators
Source, reference voltage signal is provided for two fixing ends of potentiometer.To realize the sensitivity and reliability requirement of manual ringing regulation,
Potentiometer uses the accurate potentiometer of individual pen of reliable in quality.
In the present embodiment, the signal zero-bit and Type Control circuit, including a signal zero-bit being installed on panel
Toggle switch, switch method of remote signal relay, mono-/bis-polar selecting switch, signal zero-bit toggle switch select in mono-/bis-polarity
In the presence of switch, and according to voltage/current signals selecting switch state, control signal switching control relay is by knob current potential
Device output signal, which switches, is connected to the reference signal of precise and stable 0V signals or negative reference voltage, to provide in unipolarity and double
The accurate zero-bit state of voltage, current signal under two kinds of situations of polarity.
It is usually used in proportioning valve analog signal：Electrode range of signal 0V~10V, bipolar voltage signal scope -10V
~+10V, zero signal are all 0V.And standard current signal situation is different, single, double polarity current range of signal is all 4~
20mA, unipolarity zero current signal are 4mA, and bipolar zero position current signal is 12mA.How these four different situations are coordinated
It is a design difficulty, the utility model dexterously make use of the relay tip and zero signal of single, double polarity switch control
The network collectively constituted is switched, the lower end pin of controlling potential device switches negative between reference signal and earth signal, and current potential
The sliding end of device realizes the single, double pole of voltage signal in the negative cooperation logical relation switched between reference signal and earth signal
Property scope conversion and current signal single, double polarity zero-bit change function.In view of the complexity for designing and operating, indivedual ratios
0mA~the 20mA and -20mA~+20mA specific current semiotic function that Li Fa manufacturers use are not designed into the utility model then
In product.
In the present embodiment, the voltage signal generation circuit, including one with precision operational-amplifier and by precision resistance
And the in-phase voltage amplifier that zeroing semifixed resistor is formed.Precision operational-amplifier and precision resistance and zeroing semifixed resistor
It is connected in parallel, when adjusting the input signal that potentiometer circuit provides and under the control of mono-/bis-polar selecting switch, to produce
Unipolar 0~10V and ambipolar -10V~+10V voltage signals.
In the present embodiment, circuit occurs for the current signal, including one with precision operational-amplifier, electric current triode and
The in-phase current reversed feedback amplifier being made up of precision resistance and zeroing semifixed resistor.Precision operational-amplifier and precision resistance
And zeroing semifixed resistor is connected in parallel, precision operational-amplifier is connected in series with Current amplifier triode, in regulation electricity
During the input signal that potentiometer circuit provides and under the control of mono-/bis-polar selecting switch, 4~20mA electricity of single, double polarity is produced
Flow signal.
In the present embodiment, the external signal amplitude limiter circuit, including it is connected in series with each other what is formed by transient suppression device
Protection circuit.Will be limited to from the signal clamper of outside input between positive and negative direct current supply voltage range.In view of debugging
Live electromagnetic environment is complicated, external input signal often can because of exceed under interference effect positive and negative direct current supply voltage range it
Outside, tested proportioning valve is may result under serious conditions electric fault occurs.External signal limiter protection circuit is in this feelings
It can be played a protective role under condition.Transient suppression device in the present embodiment, two-way Transient Suppression Diode or pressure can be used
Quick resistance.
In the present embodiment, the enable signal control circuit, including control enable signal button on panel
Switch, current-limiting protection/protective parts and the green LED lamp as state instruction.Enable signal toggle switch and current-limiting protection/protective parts string
Connection connection, is connected in parallel with green LED lamp, to produce the enable signal locally controlled.In view of enable signal toggle switch
It may mistakenly be used in the proportioning valve model without enabled option, if without the protection of current-limiting protection/protective parts, be enabled
The 24V voltages of signal will cause catastrophe failure due to short circuit.Current-limiting protection/protective parts are using recoverable PTC devices or simply
A resistance.Green LED indicator lamp can then allow operator to observe the state for judging enable signal.
In the present embodiment, the voltage signal measures display circuit, including a liquid crystal digital electricity being arranged on panel
Table and a DC-isolation power transfer module are pressed, DC-isolation power transfer module connects and composes electricity with liquid crystal digital voltmeter
Press signal measurement display circuit, voltage signal measure display circuit in the presence of switch method of remote signal circuit with test line shape
Into being connected in parallel, to measure display voltage signal values；
In the present embodiment, the current signal measures display circuit, including a digital electronic ammeter being arranged on panel
With a DC-isolation power transfer module, DC-isolation power transfer module connects and composes electric current letter with liquid crystal digital ammeter
Number measurement display circuit, current signal, which measures display circuit and formed in the presence of switch method of remote signal circuit with test line, goes here and there
Connection connection.To measure display current signal value.
In the present embodiment, the current signal measurement display device, voltage signal measurement display device are using 3 with backlight
Half precision liquid crystal digital panel table of position, reliability is high and measurement accuracy is preferable.Band backlight function not only can be in dim light ring
Ensure that display is clear under border, moreover it is possible to reflect the fluctuation situation of 24V voltages by backlight illumination change, during specific works：Measurement
When showing voltage signal, voltmeter lights work；When measurement shows current signal, ammeter lights work.That so designs is good
Place is brief and practical, clear and definite to operator message instruction, is not likely to produce illusion.Functional Design easily realizes that device buying is easy,
Cost is low.All design is positive in housing for Operation switch for major function setting, and using two grades of good buttons of reliability
Sub switch.Easy to operate, functional status is very clear.The knob of regulation local signal then uses individual pen linear potentiometer, signal
Reliability is good.Red green two LED lights can provide simple clearly failure and status information to operator.
In the present embodiment, voltmeter and ammeter use band 3 Semi-digital liquid crystal display panel tables of backlight, range difference
For +/- 20V and +/- 20mA.Band backlight function can not only ensure that display is clear under dim light environment, moreover it is possible to pass through backlight
Brightness changes the fluctuation situation for reflecting supply voltage.Because two gauge outfits all employ the DC-isolation modular converter of non-voltage stabilizing
By the gauge outfit supply voltage that 24V voltage conversions are 5V, then the fluctuation of 24V power supplies can be reacted on 5V out-put supply, 5V electricity
The change of pressure can allow the brightness of backlight to occur obvious change, such operator just it is observed that the situation of power-supply fluctuation,
Solution grasp 24V power-supply fluctuations change information can allow the electric 24V electric power systems of commissioning engineer's instant analysis work whether
Normally, this is judges that electrical malfunction provides effective foundation.And without worrying that the fluctuation of 5V power supplies can be to the measurement of gauge outfit
Precision brings influence, will not be by the shadow of power source change because the A/D converter ic reference systems of digital watch
Ring.Due to DC-isolation modular converter with thoroughly having isolated signal ground and the power supply of measurement port, allow the measurement of voltage x current can
To work in very wide common-mode voltage range, without worrying that the common-mode voltage of signal gives the problem of dtmf distortion DTMF that brings of measurement, this
Point during on-line measurement proportioning valve teleinstruction signal for being even more important.
In the present embodiment, the switch method of remote signal circuit, including by local/remote signal behavior toggle switch, instruction/
Monitoring selection toggle switch, voltage/current signals selection toggle switch, common/open loop _ I selection toggle switches and multiple signals
Switching control relay group into signal exchange networking, the switch method of remote signal relay is right in the presence of toggle switch
The switching of local/remote command signal, the circuit switching of instruction/monitoring dispaly state, access cutting for voltage/current signals passage
Change, and the switching of the signal detection circuit of voltage/current digital display meter, carry out coordinating and unifying control.
Because the utility model product function needs to take into account the complex relationships such as local/remote, instruction/monitoring, voltage/current
Logic coordinating problem, solve problems can use programmable digital logic circuit, can also take patrolling using relay
Function is collected to solve.The logic using relay is taken in view of reducing circuit complexity and Cost Problems, the utility model
The scheme of function.With the progress of hydraulic drive automatic technology, modern proportional valve amplifier can typically provide a reflection valve
The monitoring signals output of core working condition, generally command signal is typically to match unanimously with the type of monitoring signals,
But also there is the open loop proportioning valve series that a kind of special circumstances are current controling signal, the command signal of this kind of proportioning valve is current capacity
Type, and its monitoring signals is voltage type, and such proportioning valve is also using relatively conventional.In view of the brief spy of test function
Point, the signal type of the local signal generation of the utility model product and the signal type of measurement display are linkage logical relations,
In order to which the utility model product also can be conveniently used for into this kind of proportioning valve, it is necessary to solve this contradiction.Therefore, this practicality is new
Type has been specifically designed common/open loop _ I selection auxiliary functional switchs.When switch is in " common " gear, what local signal occurred
Signal type with measurement display signal type it is consistent, when switch in " during switch _ I " gears, local signal occur signal
Type is current mode, and the signal type for measuring display is voltage-type.
In the present embodiment, the external electrical interface, contain a core socket of proportioning valve standard 7, power supply terminal,
Proportioning valve binding post, the interior power supply circuit of the power supply terminal connecting test instrument in 7 core sockets, signal terminal then with tester
Local/remote signal behavior toggle switch connection.Power supply terminal is connected in parallel with the power supply terminal in 7 core sockets.Than
Example valve binding post is connected with each several part circuit inside tester, during debugging use at the scene, is quickly and easily connected
Connect tested proportioning valve circuit.
In the present embodiment, the power system circuit is by power switch, fuse wire, insures malfunction indicator lamp, common
The devices such as mould choking-winding, voltage-stablizer and negative electricity source converter form, to supply tested proportioning valve power supply and produce tester
Positive and negative dc source needed for each circuit module of body.
The important function of power switch is above described, fuse wire equally plays important security function, and reply can
The power supply short circuit risk that can occur.In the event of blown fuse, red LED insurances malfunction indicator lamp will be lighted.Common mode
Choking-winding can effectively filtering external 24V power supply in EMC interference problems, reduce electric fault risk.In view of tester
The DC load of body is lighter, and a simple 3 linear voltage-stablizer can be competent at the work of+15V power supplys, and negative supply is then by one
Individual switched capacitance charge pump converter takes the task for -15V by+15V voltage transformations.
Specific embodiment of the utility model is described above.It is to be appreciated that the utility model not office
It is limited to above-mentioned particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims,
This has no effect on substantive content of the present utility model.
Claims (10)
1. a kind of proportioning valve signal tester, it is characterised in that including potentiometer regulation circuit, signal zero-bit and Type Control electricity
Circuit, external signal amplitude limiter circuit, enable signal control circuit, voltage letter occur for road, voltage signal generation circuit, current signal
Number measurement display circuit, current signal measurement display circuit, switch method of remote signal circuit and external electrical interface；
Wherein, the input of the potentiometer regulation circuit is connected with the output end of signal zero-bit and Type Control circuit；It is described
The input of voltage signal generation circuit is connected with the output end of potentiometer regulation circuit, output end connection switch method of remote signal electricity
The first input end on road；The input that circuit occurs for the current signal is connected with the output end of potentiometer regulation circuit, exports
End and the second input of switch method of remote signal circuit；
The input of the external signal amplitude limiter circuit is connected with external electrical interface, and output end passes through switch method of remote signal circuit
The tested proportioning valve binding post of connection；The input of the enable signal control circuit is connected with external electrical interface, output end
Enable signal is exported to tested proportioning valve binding post；The current signal measurement display circuit, voltage signal measurement are aobvious
Show the output end of the input connection switch method of remote signal circuit of circuit.
2. proportioning valve signal tester according to claim 1, it is characterised in that the switch method of remote signal circuit includes
Local/remote signal behavior toggle switch, instruction/monitoring selection toggle switch, first voltage/current signal selection button are opened
Close, second voltage/current signal selects toggle switch and common/open loop _ I selecting switch；
Wherein, the first of the output end connection first voltage of the voltage signal generation circuit/current signal selection toggle switch
Input；The second of the output end connection first voltage of the current signal generation circuit/current signal selection toggle switch is defeated
Enter end；
The first of the output end connection local/remote signal behavior toggle switch of first voltage/current signal selection toggle switch
Input；Second input of the output end connection local/remote signal behavior toggle switch of the external signal amplitude limiter circuit；
First input end, the tested ratio of the output end link order of local/remote signal behavior toggle switch/monitoring selection toggle switch
Example valve binding post；
The output end of the instruction/monitoring selection toggle switch connects the voltage signal measurement display circuit, electric current letter
The input of number measurement display circuit；
First output end of the common/open loop _ I selecting switch connects the first voltage/current signal selection toggle switch
The 3rd input, the input of the second output end connection second voltage/current signal selection toggle switch；
The power control terminal of the voltage signal measurement display circuit is linked into second voltage/current signal selection toggle switch
First output end；
The power control terminal of the current signal measurement display circuit is linked into second voltage/current signal selection toggle switch
Second output end.
3. proportioning valve signal tester according to claim 1, it is characterised in that the potentiometer regulation circuit includes peace
Loaded on the turn knob potentiometer on panel and the reference voltage-stabilizing circuit being connected with turn knob potentiometer, the input of the reference voltage-stabilizing circuit
End is connected with the output end of signal zero-bit and Type Control circuit, and circuit, voltage letter occur for output end connection current signal
Number occur circuit input.
4. proportioning valve signal tester according to claim 3, it is characterised in that the signal zero-bit and Type Control electricity
Road, including the signal zero-bit toggle switch, switch method of remote signal relay and the selection of mono-/bis-polarity that are installed on panel are opened
Close；
The mono-/bis-polar selecting switch connects the control of the switch method of remote signal relay by signal zero-bit toggle switch
End；
The turn knob potentiometer accesses the switching circuitry of the switch method of remote signal relay.
5. proportioning valve signal tester according to claim 1, it is characterised in that the voltage signal generation circuit, bag
Include operational amplifier A 1, resistance R5, resistance R8, resistance R9 and zeroing semifixed resistor PT1；
Wherein, the output end of the in-phase input end connection of the operational amplifier A 1 potentiometer regulation circuit is connected；Resistance
R5 one end ground connection, the other end connect the inverting input of the operational amplifier A 1；
Resistance R9 one end connects the output end of the operational amplifier A 1, and the other end connects the first of switch method of remote signal circuit
Input；Resistance R8 one end connects the output end of the operational amplifier A 1, the other end connection resistance R8 other end；
Zeroing semifixed resistor PT1 both ends connect two zeroing ends of the operational amplifier A 1, sliding end concatenation operation respectively
Amplifier A1 negative pole end.
6. proportioning valve signal tester according to claim 1, it is characterised in that circuit, bag occur for the current signal
Include operational amplifier A 2, Current amplifier triode Q1, resistance R1, resistance R2, resistance R3, resistance R4, resistance R10, resistance R11,
Resistance R12, electric capacity C13 and zeroing semifixed resistor PT2；
Wherein, on the one hand the in-phase input end of the operational amplifier A 2 adjusts circuit by the resistance R2 connections potentiometer
Output end is connected, another aspect resistance R3 connection Ref power ends；Resistance R1, resistance R4 one end are grounded, described in other end connection
The inverting input of operational amplifier A 2；
Current amplifier triode Q1 base stage connects the output end of the operational amplifier A 2, and emitter stage is connected by resistance R12
Second input of switch method of remote signal circuit, colelctor electrode concatenation operation amplifier A2 positive terminal；Resistance R10 one end connection
Second input of switch method of remote signal circuit, other end concatenation operation amplifier A2 in-phase input end；Resistance R11 one end
Connect Current amplifier triode Q1 emitter stage, other end concatenation operation amplifier A2 inverting input；Resistance R11 one end
Concatenation operation amplifier A2 output end, other end concatenation operation amplifier A2 inverting input
Zeroing semifixed resistor PT2 both ends connect two zeroing ends of the operational amplifier A 2, sliding end concatenation operation respectively
Amplifier A2 negative pole end.
7. proportioning valve signal tester according to claim 1, it is characterised in that the external signal amplitude limiter circuit, bag
Include diode D6, diode D8, diode D5 and diode D7；
Wherein, diode D6 positive pole, diode D5 positive pole connect the first cathode power supply end；Diode D8 negative pole, two poles
Pipe D7 negative pole connects the first negative electricity source；
Diode D6 negative pole connection diode D8 positive pole；Diode D5 negative pole connection diode D7 positive pole.
8. proportioning valve signal tester according to claim 1, it is characterised in that the enable signal control circuit includes
Enable signal toggle switch, current-limiting protection/protective parts, the green LED lamp as state instruction, resistance are controlled on panel
R15, socket P2 and socket P1；
Wherein, one end connection control enable signal toggle switch of the socket P2, the first connection jaws of the other end pass through current limliting
Protection device connects the second cathode power supply end；Second connection jaws of the other end of the socket P2 pass through resistance R15 connection sockets
First connection jaws of P1 one end, the second connection jaws ground connection of socket P1 one end；
The other end of the socket P1 the first connection jaws connection green LED lamp positive pole, green LED lamp negative pole connection described in
Second connection jaws of the socket P1 other end.
9. proportioning valve signal tester according to claim 1, it is characterised in that the voltage signal measurement display electricity
Road, including liquid crystal digital voltmeter and the first DC-isolation power transfer module on panel；
The input connection voltage/current selection control output end of the first DC-isolation power transfer module, output end connect
Connect the liquid crystal digital voltmeter；
The output end connection liquid crystal digital voltage of the instruction of the switch method of remote signal circuit/monitoring signals control switching circuit
Table；
Voltage signal measures display circuit and is connected in parallel in the presence of switch method of remote signal circuit with test line formation, to
Measurement shows voltage signal values；
The current signal measures display circuit, including liquid crystal digital ammeter and the second DC-isolation electricity on panel
Source modular converter；
The input connection voltage/current selection control output end of the second DC-isolation power transfer module, output end connect
Connect the liquid crystal digital ammeter；The output end of the instruction of the switch method of remote signal circuit/monitoring signals control switching circuit
Connect liquid crystal digital ammeter；
Current signal measures display circuit and is connected in series in the presence of switch method of remote signal circuit with test line formation, to
Measurement shows current signal value.
10. proportioning valve signal tester according to claim 1, it is characterised in that the external electrical interface includes mark
Accurate 7 core sockets, power supply terminal, proportioning valve binding post；
The tested proportioning valve binding post of power supply terminal connection of the power supply terminal, the core socket of standard 7；
The signal terminal of the core socket of standard 7 connects local/remote signal behavior button by external signal amplitude limiter circuit and opened
The second input closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720337560.5U CN206756921U (en) | 2017-03-31 | 2017-03-31 | Proportioning valve signal tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720337560.5U CN206756921U (en) | 2017-03-31 | 2017-03-31 | Proportioning valve signal tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206756921U true CN206756921U (en) | 2017-12-15 |
Family
ID=60612002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720337560.5U Active CN206756921U (en) | 2017-03-31 | 2017-03-31 | Proportioning valve signal tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206756921U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110857960A (en) * | 2018-08-22 | 2020-03-03 | 江苏沙钢集团有限公司 | Servo valve fault detection method |
| CN112666872A (en) * | 2020-12-29 | 2021-04-16 | 南京大陆豪智能电子科技有限公司 | Conversion control system, method and equipment based on membrane switch and computer readable medium |
-
2017
- 2017-03-31 CN CN201720337560.5U patent/CN206756921U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110857960A (en) * | 2018-08-22 | 2020-03-03 | 江苏沙钢集团有限公司 | Servo valve fault detection method |
| CN112666872A (en) * | 2020-12-29 | 2021-04-16 | 南京大陆豪智能电子科技有限公司 | Conversion control system, method and equipment based on membrane switch and computer readable medium |
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