CN2161592Y - Lifting force moment limiter for microcomputer drive - Google Patents

Lifting force moment limiter for microcomputer drive Download PDF

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Publication number
CN2161592Y
CN2161592Y CN 91231808 CN91231808U CN2161592Y CN 2161592 Y CN2161592 Y CN 2161592Y CN 91231808 CN91231808 CN 91231808 CN 91231808 U CN91231808 U CN 91231808U CN 2161592 Y CN2161592 Y CN 2161592Y
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micro controller
signal
controller system
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孟昭鑫
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BAOJI ENGINEER MACHINERY FACTORY MINISTRY OF RAILWAYS
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BAOJI ENGINEER MACHINERY FACTORY MINISTRY OF RAILWAYS
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Abstract

The utility model relates to a lifting force moment limiter for microcomputer drive, comprising a microcomputer, a sensor part, an electromagnetic valve control portion, and an alarm part. A monolithic computer is adopted as a processor, the number of the hardware and the volume of a machine case are reduced, and the working stability and the working reliability can be ensured. The detected pressure difference of the upper and the lower cavities of an oil cylinder can be used as the force taking signal. The utility model has the advantages of exact data acquisition, strong interference immunity, and convenient installation; the protection range is enlarged to the whole device; as the utility model use the computer look-up technique, a lot of complex fussy function calculation can be avoided, and the work efficiency is high. As the utility model uses a self repairing circuit which is composed of the timer of the inner part of the monolithic computer, the purpose of the high interference rejection and the strong system reliability can be achieved.

Description

Lifting force moment limiter for microcomputer drive
The utility model belongs to load moment limiter and makes the field.
Prior art in the utility model prior art field is: the microcomputer load moment limiter of Chu Shouing in the market, this device adopt the expansion of Z80 single board computer (SBC) to form, and its weak point is: the line design complexity, body is big, fault rate is high.
Design goal of the present utility model is: avoid weak point of the prior art, designing a kind of is core with the micro controller system, has to detect microcomputer load moment limiter accurate, that antijamming capability is strong, body glitch rate is low, protection domain is wide.
Design plan of the present utility model is:
One, circuit layout:
1) adopt MCS-51 series 80C31 micro controller system as the control core.P 0The P of mouth 0.0～P 0.7(i.e. 39 pin～32 pin) make 8 data lines, are connected to IC 7The mouth of A and D converter ADC0802 (18～11 pin) is to memory under program IC 4EPROM data line 11～19 pin are to the three state buffer IC of hoisting crane operating mode detection ring joint 9Mouth 3,5,7,9,11,13 pin of C14503 are to the LCD driver IC of hoisting crane work parameter demonstration link 20～IC 28 Data input pin 2,3,4,5 pin of nine C4056, low three D 0, D 1, D 2Be connected to IC 18 Data input pin 4,7,13 pin of CC4042 4 d latch.While P 0The P of mouth 0.0～P 0.7(i.e. 39 pin～32 pin) as low eight bit address of system address bus, are connected to IC again 2, IC 3 Data input pin 14,13,7,4 pin of 4 d latch CC4042.
P 2The P of mouth 2.0～P 2.5(21 pin～26 pin) make high 6 bit address of address bus, are connected to IC 425,24,21,23,2,26 pin of EPOM27128.
The ale signal of 80C31 micro controller system (30 pin) is connected to IC as the latch signal of least-significant byte address 2, IC 35 pin of 4 d latch, PSEN external program memory gating signal (29 pin) is connected to IC as the reading command signal 422 pin of EPROM27128.
The INT of 80C31 micro controller system 0(12 pin) is connected to IC for external hardware interrupts the application end 75 pin of A/D converter ADC0802.External data memory read signal RD(17 pin) is connected to IC 72 pin of A/D, write signal WR(16 pin) to IC 73 pin of A/D.Simultaneously, above-mentioned read signal RD also is connected to IC 148 pin and the monostable time delay IC circuit of CC4001 42 input joint denial gates 174 pin of C4098.Write signal WR(16 pin) also connects IC 131,5,8,12 pin and IC of 42 input joint denial gates 141,5,12 pin, participate in address decoding.
80C31 micro controller system P 1The P of mouth 1.0(1 pin) is connected to IC 325 pin of CC4011 are as clear sound and light alarm signal, P 1.1(2 pin) is connected to IC 329 pin of CC4011 are as the sound and light alarm signal.P 1.4(5 pin) is connected to IC as opening and closing audible ringing signal 331 pin of 42 input nand gate CC4011.P 1.3(4 pin) is as adhesive or discharge the electromagnetic valve signal, is connected to IC 155,6 pin of 42 input nand gate CC4011.
EA end (31 pin) ground connection of 80C31 micro controller system.
The RST(9 pin of 80C31 micro controller system) is reset terminal, is connected to IC 323 pin of 42 input nand gate CC4011, electrification reset, and P end 1.2(3 pin) is the self-healing reset terminal of software, is connected to IC 322 ends.
2) 8 of the detecting sensor signal select an analog switch
8 select an analog switch IC 8Be CC4051, its 8 road detection signal line is:
Passage IN 0(13 pin) is connected to the brachium sensor;
Passage IN 1(14 pin) is connected to elevation sensor;
Passage IN 2(15 pin) is connected to oil cylinder cavity of resorption pressure sensor;
Passage IN 3(12 pin) is connected to oil cylinder upper cavity pressure sensor;
Passage IN 4(1 pin) is connected to A/D converter+5V power supply;
Passage IN 5(5 pin) is connected to host power supply+5V;
Passage IN 6(2 pin) is connected to the contact of the relay of control electromagnetic valve;
Passage IN 7(4 pin) ground connection.
IC 8Three two scale notations input control end A of CC4051, B, C(11,10,9) be connected to 4 d latch IC 18Mouth 2,10,11 pin of CC4042.
IC 8Mouth OUT(3 pin) to IC 7The V of A/D converter ADC0802 IN+End (6 pin).
Forbid input end 6 pin and V EEThe equal ground connection of 7 pin.
3) A/D converter ADC0802 gating signal CS and logical device is connected
CS end (1 pin) is by IC 17The control of C4098 monostable circuit.CS is connected to IC 3311 pin of CC4011, and IC 338 pin be connected to address decoder IC 14Inverter ic 1511 pin.IC 33Another input end 13 pin be connected to monostable IC 17The output Q end (7 pin) of C4098.
4) hoisting crane operating mode detection ring joint IC 9Line
IC 9Adopt the C14503 three state buffer.Its 2 pin is connected to panel " self check " button XQ 24 pin are connected to panel " lift heavy demonstration " button XQ 36 pin are connected to panel " supporting leg distance " button XQ 510 pin are connected to " traveling/supporting leg " state selector button XQ on the panel 412 pin ground connection; 14 pin are connected to and detect full reduced time used limit switch of state of arm.
5) address decoding circuitry
Address decoder IC 12Adopt one of 4-16 decoder C4515, its A 0, A 1, A 2, A 3Promptly 2,3,21,22 pin are to IC 21,11,10,2 pin of 4 d latch, decoding address is exported nine address gating signals altogether through logic determines:
IC 133 pin addresses be * * * 8H, be connected to the 3rd display window Liquid Crystal Display (LCD) LCD 3 Decimal place IC 281 pin of C4056;
IC 134 pin addresses be * * * 7H, be connected to the 3rd display window LCD 3Integer-bit IC 26, IC 271 pin of C4056;
IC 1310 pin addresses be * * * 6H, be connected to the second display window LCD 2 Decimal place IC 251 pin of C4056;
IC 1311 pin addresses be * * * 5H, link the second display window LCD 2Integer-bit IC 23, IC 21 pin of 4C4056;
IC 143 pin addresses be * * * 4H, be connected to the first display window LCD 1 Decimal place IC 221 pin of C4056;
IC 144 pin addresses be * * * 3H, be connected to the first display window LCD 1Integer-bit IC 20, IC 211 pin of C4056;
IC 2911 pin addresses be * * * 2H, be connected to IC 9CS end 1,15 pin of C14503;
IC 1511 pin addresses be * * * 1H, be connected to IC 338 pin;
IC 153 pin addresses be * * * 0H, be connected to IC 185 pin of CC4042;
Two, job analysis:
1) sound and light alarm link
A, hardware circuit are made of integrated circuit J556, CC4011, resistance, electric capacity, diode and loudspeaker;
B, when this numerical value of real work moment 〉=90%(adjustable) during permission hoisting moment under this operating mode, send melodious but not ear-piercing sound, send the eye-catching danger signal of flicker simultaneously;
C, have only after above-mentioned precarious position is removed, above-mentioned sound and light alarm signal just disappears;
D, send the sound and light alarm signal after, operating personal can be pushed " noise elimination " button, alarm sound disappears, rather than sound device is turn-offed.But visual alarm still exists.
E, if after 2 minutes 15 seconds, hoisting crane above-mentioned precarious position of living in is not removed, alarm sound will occur again, at this moment, press " noise elimination " button, still can eliminate the noise, and not remove precarious position after 2 minutes 15 seconds, will repeat chimes of doom again.
The circuit of this link is seen the sound and light alarm link in the accompanying drawing one.Now that its principle Analysis is as follows: the core of this link is a collector IC 19Dual time base timer J556, luminescent device are φ 5 red light emitting diodes, and microphone device is YD0.25W, 8 Ω electrodynamic loudspeakers.The analysis of its working process is as shown in Figure 5:
Among Fig. 5,1 expression high level 〉=4.5 volt, 0 represents low level≤0.3 volt.P 1.0, P 1.1, P 1.4The signal of three ends is sent by micro controller system.XD 2The oscillator signal of end is by the oscillator generation that first order timer and the RC of dual time base timer J556 forms, the about 0.5HZ of frequency.The aud. snl. of YD end, the oscillator of being made up of second utmost point timer and RC produces the about 800HZ of frequency.More than two oscillation frequency can by regulate the RC parameter change it.
2) solenoid control link
This link circuit is seen accompanying drawing one.When this value of the actual hoisting moment 〉=100%(of hoisting crane can be adjusted) during permission hoisting moment under this operating mode, computing machine sends one " 0 " signal by the P end, through IC 15The phase inverter paraphase is " 1 ", and improves the power-handling capability of this signal, through diode 2AP 13Add to first order aerotron BG 1The 3DG6A base stage is amplified, and promotes second utmost point aerotron BG 2(3DG7A), drive small-sized middle power relay J, its contact is given the electromagnetic valve DT in the hoisting arm expansion oil cylinder oil circuit respectively 1, electromagnetic valve DT in the amplitude oil cylinder oil circuit 2Power supply.DT 1Adhesive is put back to oil sump with pressure oil, and telescopic oil cylinder no longer moves the danger that promptly increases work range to the semi-girder direction, oppositely moves unaffected.DT 2Adhesive makes the amplitude oil cylinder can not be to reducing the arm elevation angle, and the dangerous direction that promptly increases work range moves, and oppositely (increases the arm elevation angle) and move unaffected.
In this link, BG 1, BG 2Two aerotrons are formed multiple unit tube; Diode 2AP 13Playing buffer action, is the action of advance copy link when maintenance, but hand button XQ 7, 2AP 13Isolate its high level, avoid adding to IC 154 pin mouths; Simultaneously, utilize the forward threshold values of 2AP, avoid IC 15Output low level (≤0.3 volt) causes the misoperation of electromagnetic valve.
3) A and D converter
This link IC 7Adopt ADC0801(or 0802), finish of the conversion of the analog quantity of signal to digital quantity.Hoisting crane belongs to the construction machinery and equipment of field work, and its power supply is provided by 24 volts of storage batterys of hoisting crane.Because in the hoisting crane complete machine power supply, the negative pole of storage battery has been connected to the car body of hoisting crane, so, have only positive supply and do not have negative supply.Adopt ADC0801(or ACD0802) be exactly in order to adapt to this characteristics of power supply, ADC0801 only needs single supply+5V, has avoided the specific (special) requirements on the power supply.
Need a clock signal during A/D converter work, in order to reduce hardware as far as possible, this link had not both been established the clock signal that oscillator produces 640KHZ in addition, did not adopt frequency divider that the crystal oscillator signal amplification frequency division of 4MHZ is made clock signal yet, and adopted ADC0802 with CLKR end (IC 719 pin) and CLKIN end (IC 74 pin) adopt the connection of accompanying drawing one, produce the real time clock signal by chip internal.
ADC0801(or 0802) above-mentioned advantage is arranged, simultaneously, it has the specific (special) requirements of self again.It requires chip selection signal CS(IC 71 pin) must be effective all the time in whole switching process, promptly CS end is always low level " 0 " (≤0.3 volt).For this reason, adopted following logic control circuit to guarantee to the CS signal: its working process and logical relation are as shown in Figure 6.
The subject word of visible CS chip selection signal comprises that A/D work and CPU read the overall process of data from the A/D latch among Fig. 6.It is effective that above signal is " 0 ".
4) hoisting crane operating mode detection ring joint
One six homophase three state buffer IC of this link 9C14503 is to latch the variation of crane operating status.In the job procedure of limiter of moment, content of buffer is all read in each circulation, and what the judgment task state has change.
This device both had been applicable to the car hosit of supporting leg state work, be applicable to again supporting leg or not supporting leg be the railroad track crane-car of walking state lift heavy, simultaneously, also be applicable to the hoisting crane that supporting leg distance can change.
The panel button XQ of band self-locking 4Selecting mode of operation is supporting leg or traveling lift heavy; XQ 5Select the supporting leg distance, totally two grades of selective scopes.
XQ 2Be " self check " the at a slow speed button in the limiter of moment " OBD (On-Board Diagnostics) "; XQ 3For showing second group of working parameter button of hoisting crane.The purpose that the XK limit switch is provided with is whether the telescopic boom that detects hoisting crane all withdraws.
COMPUTER DETECTION with carrying out different branched programs, is done different computings behind the state of above-mentioned each button and limit switch.XQ wherein 3, XQ 4, XQ 5The variation of button is with the signal lamp XD that makes on the panel 3, XD 4, XD 5Luminous or extinguish, note to remind the operator.
5) address decoding circuitry
Nine of the total peripheral port of this device are although in order to reduce device, only adopt IC 12A slice C4515 latchs/the 4-16 decoder, promptly only to low four bit address decoding, promptly * * * 0H to * * * 8H(* expression underrange can be arbitrarily).Above-mentioned nine address signals " are read " or " writing " function according to it, respectively with computing machine " read " signal RD or " writing " signal WR mutually " with ", produce corresponding gating signal, to guarantee the correct of logic.
The address number of each peripheral hardware is respectively:
1. eight select an analog switch IC 8CC4051 is * * * OH;
2. A/D converter IC 7ADC0801 is * * * 1H;
3. operating mode three state buffer IC 9C14503 is * * * 2H;
4. first display window integer-bit LCD driver IC 20, IC 21C4056 is * * * 3H;
5. first display window decimal place LCD driver IC 22C4056 is * * * 4H;
6. second display window integer-bit LCD driver IC 23, IC 24C4056 is * * * 5H;
7. second display window decimal place LCD driver IC 25C4056 is * * * 6H;
8. the 3rd display window integer-bit LCD driver IC 26, IC 27C4056 is * * * 7H;
9. the 3rd display window decimal place LCD driver IC 28C4056 is * * * 8H.
Three, OBD (On-Board Diagnostics) code
Limiter of moment is a kind of safety device, if accidental the breaking down of it and peripheral hardware auxiliary device thereof maybe needs to adjust or not start on request, will cause error in data or inaccurate, creates a deceitful impression to the driver easily, leads to a disaster.So " OBD (On-Board Diagnostics) " of limiter of moment is epochmaking safety measure, be the effective means that improves its reliability.
" OBD (On-Board Diagnostics) " item by item at a slow speed shows with code form, normally then shows the P code, mal demonstration H * * code.Including of each code is:
(1) H00: main frame+5V power supply is low, and its reason may be accumulator jar+24V voltage below level, or broken string, or voltage stabilizer damages;
(2) H01:A/D conv+5V power supply is low, the same H00 of its reason;
(3) H02: ground wire has voltage in the machine, and reason may be the ground wire broken string, virtually connects, rosin joint, corrosion etc.;
(4) H03: the signal of brachium sensor input computing machine is zero, and its reason may be relevant line broken string, and the built-in potential device damages;
(5) H04: the brachium sensor is worked all the year round, is vibrated because of hoisting crane, and it is too many to the skew of small-signal direction zero point to cause measuring pulley to drive potential device;
(6) H05: the brachium sensor is because hoisting crane is worked all the year round, vibrated, and it is too many to the skew of large-signal direction zero point to cause measuring pulley to drive potential device, needs to adjust;
(7) H06: angular transducer causes the line broken string because of reasons such as hoisting crane is worked all the year round, vibrations, or the potential device contact is stuck or damage;
(8) H07: amplitude oil cylinder cavity of resorption pressure signal is 0, and its reason may be a broken string, or sensor damages;
(9) H08: amplitude oil cylinder upper cavity pressure signal is 0, the same H07 of its reason;
(10) H09: it may be that device quality is bad that the program storage damages its reason along EPROM, or certain extraordinary cause has burnt out device;
(11) H10: the not adhesive of middle power relay of control electromagnetic valve adhesive or poor contact of contacts.Its reason may be accumulator jar+24V voltage below level, or relay damaged, or the IC in the solenoid control link 15, 2AP 13, BG 1, BG 2Damage is arranged in the device;
(12) H11: expression amplitude oil cylinder upper cavity pressure equals the rated pressure of pressure sensor.Its reason is that its operating pressure value need be safeguarded and adjust to the balance cock of the speed limit hydraulic lock in this hoisting crane oil circuit;
(13) H12: not start on request.Its reason be telescopic boom fully withdrawal open the source switch of limiter of moment when (or having stretched out), should first switch power supply, semi-girder again;
(14) H13: the micro controller system internal RAM is damaged;
(15) H14: computing machine overflows in computing, and its reason is that working environment has strong jamming or device failure.
Four, hoisting crane has a related parameter
The input computing machine related parameter totally three parts are arranged:
1, the construction parameter of crane part, as shown in Figure 7.
Total: OO ', O ' B, FR, HR, O ' Fmax
O ' Fmin, amplitude oil cylinder internal diameter, cylinder rod external diameter, the minimum work of hoisting crane angle of elevation alpha min, maximum elevation α max, arm deadweight, minimum work range, α value during β=90 °.R is the center of gyration of getting on the bus.
2, limiter of moment has a related parameter, as shown in figure 18.
Total: the 1. current potential V of the trimmer potentiometer W of brachium sensor LO
2. the current potential V of the trimmer potentiometer W of elevation sensor Ao
3. the output signal V of elevation sensor during the arm horizontal positioned a
4. upper and lower cavity pressure sensor is 0 o'clock current potential V at zero point at pressure PLO, V PHO
The rated pressure PH of 5. upper and lower cavity pressure sensor, PL.
3, about functional value and lifting performance curve, deposit memory under program in, have sine value, cosine value, tangent value, the arc-tangent value of 0～90 degree, angle of elevation alpha and amplitude oil cylinder bar elevation angle β synopsis, one group of lifting performance curve t with tabulated form H=f(s).
Three, principle of work is summarized as follows:
The microcomputer load moment limiter, it comprises display panel 15, housing 16, voltage stabilizer 1, telltale 4, micro controller system IC 1P 0The P of mouth 0.0～P 0.7(39 pin～32 pin) connect the 7A/D converter IC as 8 data lines 7Mouth 18 pin～11 pin, 9 memory under program IC 4The three state buffer IC of data line 11～19 pin, hoisting crane operating mode detection ring joint 14 9Mouth 3,5,7,9,11,13 pin, data input pin 2～5 pin of telltale 4, micro controller system IC 1P 0Low three D of mouth 0, D 1, D 2Meet 4 d latch IC 18Data input pin 4,7,13 pin, micro controller system IC 1P 0The P of mouth 0.0～P 0.7Also meet 4 d latch IC as low eight bit address of system address bus 2, IC 3Data input pin 14,13,7,4 pin, micro controller system IC 1P 2The P of mouth 2.0～P 2.5(21 pin～26 pin) meet memory under program IC as high 6 bit address of address bus 425,24,21,23,2,26 pin, micro controller system IC 1Ale signal (30 pin) meet 4 d latch IC as the latch signal of least-significant byte address 2, IC 35 pin, IC 1External program memory gating signal (29 pin) meet memory under program IC as the reading command signal 422 pin, micro controller system IC 1The INT(12 pin) be that external hardware interrupts application termination A/D converter IC 75 pin, external data memory read signal RD(17 pin) meet A/D converter IC 72 pin, 5 address decoder IC 142 the input or the door 8 pin and monostable time delay IC circuit 1741 pin, write signal WR(16 pin) meet A/D converter IC 73 pin, 5 address decoder IC 1342 the input joint denial gates 1,5,8,12 pin and IC 141,5,12 pin, participate in address decoding, micro controller system IC 1P 1The P of mouth 1.0(1 pin) meets IC in the combined aural and visual alarm 2 325 pin, as eliminating sound and light alarm signal, micro controller system IC 1P 1The P of mouth 1.1(2 pin) connects 9 pin of combined aural and visual alarm 2, as the sound and light alarm signal, and micro controller system IC 1P 1The P of mouth 1.4(5 pin) meets IC in the combined aural and visual alarm 2 331 pin of 42 input nand gates, as opening and closing audible ringing signal, micro controller system IC 1P 1The P of mouth 1.3(4 pin) meets IC in the solenoid valve controller 3 155,6 pin of 42 input nand gates are as adhesive or release electromagnetic valve signal, micro controller system IC 1EA end (31 pin) ground connection, micro controller system IC 1The RST(9 pin) be IC in the termination combined aural and visual alarm 2 that resets 323 pin of 42 input nand gates, electrification reset, micro controller system IC 1P 1The P of mouth 1.2End (3 pin) meets IC in the combined aural and visual alarm 2 322 ends, as the self-healing reset terminal of software;
8 analogue quantity switch IC 8Passage IN 0(13 pin) meets brachium sensor 10, passage IN 1(14 pin) meets elevation sensor 11, passage IN 2(15 pin) meets oil cylinder cavity of resorption pressure sensor 12, passage IN 3(12 pin) meets oil cylinder upper cavity pressure sensor 13, passage IN 4(1 pin) meets A/D converter+5V power supply, passage IN 5(5 pin) meets host power supply+5V, passage IN 6(2 pin) connects the relay J of control electromagnetic valve 4The contact, passage IN 7(4 pin) ground connection, IC 8Three two scale notations input control end A, B, C(11,10,9 pin) meet 4 d latch IC 18Mouth 2,10,11 pin, IC 8Mouth (3 pin) meet A/D converter IC 7V IN+End (6 pin), IC 8Forbid input end 6 pin and V EEThe equal ground connection of 7 pin;
The gating signal CS end (1 pin) of A/D converter 7 is by monostable circuit IC 17Control, and IC in the CS termination combined aural and visual alarm 2 3311 pin, IC 338 pin ground connection location decoder IC 14Inverter ic 1511 pin, IC 33Another input end order steady-state circuit IC 17Output Q end (7 pin);
Hoisting crane 14 operating mode detector IC 9Adopting three state buffer, its 2 pin to connect panel " self check " button, 4 pin connects panel " lift heavy demonstrations " button, 6 pin and connects panel " supporting leg distance " button, 10 pin and connect panel " traveling/supporting leg " state selector button, 12 pin ground connection, 14 pin and connect full reduced time used limit switch of state of detection arm.
5 address decoder IC 12A 0～A 3(2,3,21,22 pin) connects 1,11,10,2 pin of 4 d latch, and decoding address is exported nine address gating signals altogether through logic determines:
IC 133 pin addresses be * * * 8H, be connected to the 3rd display window Liquid Crystal Display (LCD) LCD 3 Decimal place IC 281 pin;
IC 134 pin addresses be * * * 7H, be connected to the 3rd display window LCD 3Integer-bit IC 26, IC 271 pin;
IC 1310 pin addresses be * * * 6H, link the second display window LCD 2 Decimal place IC 251 pin;
IC 1311 pin addresses be * * * 5H, link the second display window LCD 2Integer-bit IC 23, IC 241 pin;
IC 143 pin addresses be * * * 4H, be connected to the first display window LCD 1 Decimal place IC 221 pin;
IC 144 pin addresses be * * * 3H, be connected to the first display window LCD 1Integer-bit IC 20, IC 211 pin;
IC 2911 pin addresses be * * * 2H, be connected to IC 9CS end 1,15 pin;
IC 1511 pin addresses be * * * 1H, be connected to IC 138 pin;
IC 153 pin addresses be * * * 0H, be connected to IC 185 pin;
Pressure sensor (12,13) lays respectively on upper and lower two oil pockets of amplitude oil cylinder.The software flow of microcomputer load moment limiter as shown in Figure 9.
As shown in Figure 4, after the start, this moment is limited relevant device to micro controller system and each sensor carries out " OBD (On-Board Diagnostics) " fast, installs all normal sides and enter job procedure to guarantee this.
If the diagnostic system mal, telltale shows character " H--", uses and goes into to push " self check " button, and calculator is diagnosed item by item, and fault coverage is pointed out with code form, and the maintainer points out in view of the above and adjusts or maintenance.
After " OBD (On-Board Diagnostics) " is normal, gating 8 selects 1 analogue quantity switch respectively, incoming signal to brachium sensor, elevation sensor, pressure sensor (), pressure sensor (two) carries out the A/D conversion respectively, and the digital quantity after will changing reads in CPU and carries out digital operation, the required intrinsic parameter of intermediate parameters, hoisting crane, lifting characteristic, various functional value in the computing all reads from the form of input routine memory in advance.
When this operating mode rated moment of the current hoisting moment of hoisting crane 〉=90%, micro controller system sends signal to acoustic-optic alarm, and this device sends melodious chimes of doom, and the red eye flicker on the panel is luminous, to remind the driver.After this operating personal is pushed " noise elimination " button, and chimes of doom disappears temporarily, and visual alarm still exists, and after a period of time, the hoisting crane precarious position is not removed, and chimes of doom will occur again.When hoisting moment 〉=this operating mode rated moment 110% the time, micro controller system sends signal, cuts off hoisting crane and moves to dangerous direction.Above-mentioned 90%, 110% limit can reset.
This device shows two groups of data altogether, and promptly first group: the rated load weight under this operating mode, amplitude, hoisting moment account for the percentum of specified hoisting moment; Second group: actual lift heavy, brachium, the arm elevation angle.
The utility model is compared with prior art:
1, according to the characteristic of hoisting crane limiter of moment, central processing unit adopts micro controller system, strengthen function, dwindled volume, adopt ADCO80 * serial D and A converter to satisfy the requirement of engineering truck field work, reduced device special purpose interface system, so the hardware device than universal machines such as Z80, single board computer (SBC), STD bus machines lacks, circuit is simple, volume is little, fault rate is low.
2, adopt special-purpose high-power sensor; the difference of pressure that detects the upper and lower chamber of oil cylinder from the relevant oil cylinder of hoisting crane has been avoided the long line transmission of small and weak signal as the power taking signal, prevents interference; simultaneously easy for installation, and crane operating status safety whether protection domain is enlarged than prior art.
3, adopt distinctive warning circuit, but the operating personal intermittence is eliminated audible alarm, and have only hoisting crane to be in a safe condition down, can thoroughly remove warning.
4, utilize the computing machine look up table technique, with hoisting crane have related parameter and used function standby with the program store of tabulated form input computing machine, avoid the loaded down with trivial details function calculation of large amount of complex, shortened the operation time of micro controller system, improved reliability.
5, adopt micro controller system in-to-in timer, form software " self-repairing circuit ", do not increase any device, reach the purpose that prevents to disturb, improve system reliability.
6, the utility model is with low cost, is applicable to the jib-type car hosit, track crane.
Description of drawings:
Fig. 1 is the panel scheme drawing of microcomputer load moment limiter.
Fig. 2 is the plan structure scheme drawing of microcomputer load moment limiter.
Fig. 3 is the circuit block diagram of microcomputer load moment limiter.
Fig. 4 is the schematic block circuit diagram of microcomputer load moment limiter.
Fig. 5 is 1 schematic circuit diagram among Fig. 4.
Fig. 6 is 2 schematic circuit diagram among Fig. 4.
Fig. 7 is 3 schematic circuit diagram among Fig. 4.
Fig. 8 is 9 schematic circuit diagram among Fig. 4.
Fig. 9 is 4 schematic circuit diagram among Fig. 4.
Figure 10 is 5 schematic circuit diagram among Fig. 4.
Figure 11 is 6 and 7 schematic circuit diagram among Fig. 4.
Figure 12 is 8,11,12,13 schematic circuit diagram among Fig. 4.
Figure 13 is 10 schematic circuit diagram among Fig. 4.
Figure 14 is 14 schematic circuit diagram among Fig. 4.
Figure 15 is the sound and light alarm link job analysis potential waveform figure of microcomputer load moment limiter.
Figure 16 is the A and D converter work and the logical relation mode chart of microcomputer load moment limiter.
Figure 17 is the diagram scheme drawing that related parameter is arranged of the hoisting crane of microcomputer load moment limiter.
Figure 18 be the microcomputer load moment limiter limiter of moment the related parameter scheme drawing arranged.
Figure 19 is the software flow scheme drawing of microcomputer load moment limiter.
Embodiment:
Fig. 1～Fig. 5 is a kind of embodiment of microcomputer load moment limiter.
Implement: at first make housing, printed circuit board and purchase components and parts with reference to accompanying drawing 1～4 and specification sheets the 5th part; Installation and Debugging get final product by the prior art Installation and Debugging with reference to Figure of description 1～4 and specification sheets the 5th part.

Claims (2)

1, a kind of microcomputer load moment limiter, it comprises display panel 15, housing 16, voltage stabilizer 1, telltale 4, it is characterized in that: micro controller system IC 1P 0The P of mouth 0.0～P 0.7(39 pin～32 pin) connect the 7A/D converter IC as 8 data lines 7Mouth 18 pin～11 pin, 9 memory under program IC 4The three state buffer IC of data line 11～19 pin, hoisting crane operating mode detection ring joint 14 9Mouth 3,5,7,9,11,13 pin, data input pin 2～5 pin of telltale 4, micro controller system IC 1P 0Low three D of mouth 0, D 1, D 2Meet 4 d latch IC 18Data input pin 4,7,13 pin, micro controller system IC 1P 0Mouthful P 0.0～P 0.7Also meet 4 d latch IC as low eight bit address of system address bus 2, IC 3Data input pin 14,13,7,4 pin, micro controller system IC 1P 2The P of mouth 2.0～P 2.5(21 pin～26 pin) meet memory under program IC as high 6 bit address of address bus 425,24,21,23,2,26 pin, micro controller system IC 1Ale signal (30 pin) meet 4 d latch IC as the latch signal of least-significant byte address 2, IC 35 pin, IC 1External program memory gating signal (29 pin) meet memory under program IC as the reading command signal 422 pin, micro controller system IC 1INT (12 pin) be that external hardware interrupts application termination A/D converter IC 75 pin, external data memory read signal RD (17 pin) meets A/D converter IC 72 pin, 5 address decoder IC 142 the input or the door 8 pin and monostable time delay IC circuit 1741 pin, write signal WR (16 pin) meets A/D converter IC 73 pin, 5 address decoder IC 1342 the input joint denial gates 1,5,8,12 pin and IC 141,5,12 pin, participate in address decoding, micro controller system IC 1P 1The P of mouth 1.0(1 pin) meets IC in the combined aural and visual alarm 2 325 pin, as eliminating sound and light alarm signal, micro controller system IC 1P 1The P of mouth 1.1(2 pin) connects 9 pin of combined aural and visual alarm 2, as the sound and light alarm signal, and micro controller system IC 1P 1The P of mouth 1.4(5 pin) meets IC in the combined aural and visual alarm 2 331 pin of 42 input nand gates, as opening and closing audible ringing signal, micro controller system IC 1P 1The P of mouth 1.3(4 pin) meets IC in the solenoid valve controller 3 155,6 pin of 42 input nand gates are as adhesive or release electromagnetic valve signal, micro controller system IC 1EA end (31 pin) ground connection, micro controller system IC 1RST (9 pin) be IC in the termination combined aural and visual alarm 2 that resets 323 pin of 42 input nand gates, electrification reset, micro controller system IC 1P 1The P of mouth 1.2End (3 pin) meets IC in the combined aural and visual alarm 2 322 ends, as the self-healing reset terminal of software;
8 analogue quantity switch IC 8Passage IN 0(13 pin) meets brachium sensor 10, passage IN 1(14 pin) meets elevation sensor 11, passage IN 2(15 pin) meets oil cylinder cavity of resorption pressure sensor 12, passage IN 3(12 pin) meets oil cylinder upper cavity pressure sensor 13, passage IN 4(1 pin) meets A/D converter+5V power supply, passage IN 5(5 pin) meets host power supply+5V, passage IN 6(2 pin) connects the relay J of control electromagnetic valve 4The contact, passage IN 7(4 pin) ground connection, IC 8Three two scale notations input control end A, B, C (11,10,9 pin) meet 4 d latch IC 18Mouth 2,10,11 pin, IC 8Mouth (3 pin) meet A/D converter IC 7V IN+End (6 pin), IC 8Forbid input end 6 pin and V EEThe equal ground connection of 7 pin;
The gating signal CS end (1 pin) of A/D converter 7 is by monostable circuit IC 17Control, and IC in the CS termination combined aural and visual alarm 2 3311 pin, IC 338 pin ground connection location decoder IC 14Inverter ic 1511 pin, IC 33Another input end order steady-state circuit IC 17Output Q end (7 pin);
Hoisting crane 14 operating mode detector IC 9Adopting three state buffer, its 2 pin to connect panel " self check " button, 4 pin connects panel " lift heavy demonstrations " button, 6 pin and connects panel " supporting leg distance " button, 10 pin and connect panel " traveling/supporting leg " state selector button, 12 pin ground connection, 14 pin and connect full reduced time used limit switch of state of detection arm.
5 address decoder IC 12A 0～A 3(2,3,21,22 pin) connects 4 d latch 1,11,10,2 pin, and decoding address is exported nine address gating signals altogether through logic determines:
IC 133 pin addresses be * * * 8H, be connected to the 3rd display window Liquid Crystal Display (LCD) LCD 3Decimal place IC 281 pin;
IC 134 pin addresses be * * * 7H, be connected to the 3rd display window LCD 3Integer-bit IC 26, IC 271 pin;
IC 1310 pin addresses be * * * 6H, link the second display window LCD 2Decimal place IC 251 pin;
IC 1311 pin addresses be * * * 5H, link the second display window LCD 2Integer-bit IC 23, IC 241 pin;
IC 143 pin addresses be * * * 4H, be connected to the first display window LCD 1Decimal place IC 221 pin;
IC 144 pin addresses be * * * 3H, be connected to the first display window LCD 1Integer-bit IC 20, IC 211 pin;
IC 2911 pin addresses be * * * 2H, be connected to IC 9CS end 1,15 pin;
IC 1511 pin addresses be * * * 1H, be connected to IC 138 pin;
IC 153 pin addresses be * * * 0H, be connected to IC 185 pin;
2, microcomputer load moment limiter according to claim 1 is characterized in that: pressure sensor (12,13) lays respectively on upper and lower two oil pockets of amplitude oil cylinder.
CN 91231808 1991-12-29 1991-12-29 Lifting force moment limiter for microcomputer drive Expired - Fee Related CN2161592Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 91231808 CN2161592Y (en) 1991-12-29 1991-12-29 Lifting force moment limiter for microcomputer drive

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 91231808 CN2161592Y (en) 1991-12-29 1991-12-29 Lifting force moment limiter for microcomputer drive

Publications (1)

Publication Number Publication Date
CN2161592Y true CN2161592Y (en) 1994-04-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN 91231808 Expired - Fee Related CN2161592Y (en) 1991-12-29 1991-12-29 Lifting force moment limiter for microcomputer drive

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CN (1) CN2161592Y (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100465846C (en) * 2006-09-15 2009-03-04 上海三一科技有限公司 Crawler crane torque controlling method and apparatus under super lifting working condition
CN102482064A (en) * 2009-09-21 2012-05-30 罗伯特·博世有限公司 Method and control unit for determining the height of a tool equipped with a pivoting element
CN102745132A (en) * 2012-06-14 2012-10-24 四川交通职业技术学院 Semi-linkage acousto-optic alarming device of automobile clutch and operation mode of semi-linkage acousto-optic alarming device
WO2012163190A1 (en) * 2011-06-01 2012-12-06 湖南三一智能控制设备有限公司 Device and method for detecting movable counterweight of crane
CN106882706A (en) * 2017-02-28 2017-06-23 长治清华机械厂 Tower crane control protection system
CN107651565A (en) * 2017-08-28 2018-02-02 北汽福田汽车股份有限公司 A kind of method of inspection, device and the limiter of moment of Car Crane Retractable Arms operating mode

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100465846C (en) * 2006-09-15 2009-03-04 上海三一科技有限公司 Crawler crane torque controlling method and apparatus under super lifting working condition
CN102482064A (en) * 2009-09-21 2012-05-30 罗伯特·博世有限公司 Method and control unit for determining the height of a tool equipped with a pivoting element
CN102482064B (en) * 2009-09-21 2015-11-25 罗伯特·博世有限公司 For determining method and the controller of the height of the working equipment being equipped with swing element
WO2012163190A1 (en) * 2011-06-01 2012-12-06 湖南三一智能控制设备有限公司 Device and method for detecting movable counterweight of crane
CN102745132A (en) * 2012-06-14 2012-10-24 四川交通职业技术学院 Semi-linkage acousto-optic alarming device of automobile clutch and operation mode of semi-linkage acousto-optic alarming device
CN102745132B (en) * 2012-06-14 2015-07-01 四川交通职业技术学院 Semi-linkage acousto-optic alarming device of automobile clutch and operation mode of semi-linkage acousto-optic alarming device
CN106882706A (en) * 2017-02-28 2017-06-23 长治清华机械厂 Tower crane control protection system
CN107651565A (en) * 2017-08-28 2018-02-02 北汽福田汽车股份有限公司 A kind of method of inspection, device and the limiter of moment of Car Crane Retractable Arms operating mode

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