CN202631264U - Self-checking circuit for tractor cab testing system - Google Patents
Self-checking circuit for tractor cab testing system Download PDFInfo
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- CN202631264U CN202631264U CN 201220218740 CN201220218740U CN202631264U CN 202631264 U CN202631264 U CN 202631264U CN 201220218740 CN201220218740 CN 201220218740 CN 201220218740 U CN201220218740 U CN 201220218740U CN 202631264 U CN202631264 U CN 202631264U
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Abstract
The utility model discloses a self-checking circuit for a tractor cab testing system. The tractor cab testing system comprises an industrial personal computer, a programmable logic controller (PLC) and an adapter rack, wherein the adapter rack consists of an external input signal joint, an external control joint and a water temperature/oil pressure joint. The self-checking circuit comprises a self-checking joint assembly, a relay unit and a feedback joint assembly, which are sequentially connected, wherein the self-checking joint assembly comprises a plurality of self-checking joints, and is connected with the external control joint and the water temperature/oil pressure joint; the feedback joint assembly comprises a plurality of feedback joints, and is connected with the external input signal joint; and the relay unit comprises a plurality of relays, and each relay receives the output of the PLC through own corresponding self-checking joint to realize the closing or opening of each relay contact, and finishes mapping the input of the PLC through own corresponding feedback joint. Therefore, the tractor cab testing system is self-checked.
Description
Technical field
The utility model relates to a kind of self-checking circuit, relates in particular to a kind of self-checking circuit that is used for tractor driving cabin test macro.
Background technology
Along with the raising gradually of modern tractor performance,, must keep desirable comprehensive parameters in order to guarantee modern tractor safety and driver's handiness.Therefore, the test of tractor comprehensive parameters is just seemed particularly important, if testing process is dealt with improperly and may be caused dangerous situation, equipment breakdown etc. takes place in injury or the slight wound moderate like the person.Therefore; The applicant in submitting on the same day of the application the patented claim of by name " a kind of tractor driving cabin test macro "; Can effectively test the comprehensive parameters in tractor driving cabin; As shown in Figure 1; Switching frame 3, photoelectrical coupler 4, network resistor circuit 5, programmable power supply 6, Switching Power Supply 7 and self-checking circuit 8 that said test macro comprises industrial computer 1, PLC (Programmable Logic Controller, programmable logic controller (PLC)) 2, is made up of external input signal joint 301, external control joint 302 and water temperature/Oil-pressure joint 303, wherein; Self-checking circuit 8 is used for tractor driving cabin test macro is carried out self check, guarantees that with this this test macro itself is no problem.Therefore, need self-checking circuit 8 is designed especially.
Summary of the invention
The purpose of the utility model is to provide a kind of self-checking circuit that is used for tractor driving cabin test macro, and is simple and reliable, through to the reception of PLC output and the mapping that PLC is imported, accomplishes the self check to tractor driving cabin test macro.
The technical scheme that realizes above-mentioned purpose is:
Switching frame, photoelectrical coupler, network resistor circuit, self-checking circuit, programmable power supply and Switching Power Supply that a kind of self-checking circuit that is used for tractor driving cabin test macro, said tractor driving cabin test macro comprise industrial computer, PLC, are made up of external input signal joint, external control joint and water temperature/Oil-pressure joint; The said external input signal joint of the input termination of said PLC, the output said external control joint of termination and water temperature/Oil-pressure joint; Said self-checking circuit connects said switching frame, and said self-checking circuit comprises self check joint group, relay group and the feedback joint group of joining successively, wherein:
Said self check joint group comprises some self check joints, and this self check joint group connects said external control joint and water temperature/Oil-pressure joint;
Said feedback joint group comprises some feedback joints, and this feedback joint group connects said external input signal joint;
Said relay group comprises some relays, and each relay receives the output of said PLC through each self check joint of correspondence, realizes the adhesive or the disconnection of each relay contact, accomplishes the mapping to said PLC input through the joint that respectively feeds back of correspondence.
The beneficial effect of the utility model is: the utility model is simple and reliable; Through reception that PLC is exported and the mapping that PLC is imported; Accomplish self check to tractor driving cabin test macro; Thereby guarantee that test macro itself is no problem, on this basis, guarantee the comprehensive parameters in tractor driving cabin is effectively tested.
Description of drawings
Fig. 1 is the structural drawing of tractor driving cabin test macro;
Fig. 2 is the structural representation of the self-checking circuit that is used for tractor driving cabin test macro of the utility model;
Fig. 3 is the structural representation of the specific embodiment of the utility model.
Embodiment
To combine accompanying drawing that the utility model is described further below.
See also Fig. 1; Tractor driving cabin test macro comprises industrial computer 1, PLC2, switching frame 3, photoelectrical coupler 4, network resistor circuit 5, programmable power supply 6, the Switching Power Supply 7 that is made up of external input signal joint 301, external control joint 302 and water temperature/Oil-pressure joint 303 and the self-checking circuit 8 that contains some joints, wherein:
Switching Power Supply 7 connects PLC2 and self-checking circuit 8;
Switching frame 3, each joint in it docks each detection tabs in corresponding tractor driving cabin respectively, perhaps docks each joint of corresponding self-checking circuit 8;
PLC2, its input end connects external input signal joint 301 through photoelectrical coupler 4, and its first output terminal directly connects external control joint 302, and its second output terminal connects water temperature/Oil-pressure joint 303 through network resistor circuit 5.
Tractor driving cabin test macro also comprises the manually-operated handle that connects PLC2, and the display, printer and the scanner that connect industrial computer 1 respectively.
Wherein, self-checking circuit 8 is the part that the utility model designed and required protection.See also Fig. 2; The self-checking circuit that is used for tractor driving cabin test macro of the utility model; The input end of PLC2 connects external input signal joint 301 through photoelectrical coupler 4, and output terminal directly connects external control joint 302 and passes through network resistor circuit 5 water receiving temperature/Oil-pressure joints 303; The self-checking circuit 8 of the utility model comprises self check joint group 801, relay group 802 and the feedback joint group 803 of joining successively, wherein:
Self check joint group 801 comprises some self check joints, and this self check joint group 801 connects external control joint 302 and water temperature/Oil-pressure joint 303; Feedback joint group 803 comprises some feedback joints, and this feedback joint group 803 connects external input signal joint 301;
See also Fig. 3, be a specific embodiment of the utility model.In this embodiment, self check joint group 801 comprises that braking oil level joint 8011 (receiving PLC output Y34), liquid storage dried joint 8012 (receiving PLC output Y33), left brake pressure joint 8013 (receiving PLC output Y21), right brake pressure joint 8014 (receiving PLC output Y22), engine oil pressure joint 8015 (receiving PLC output Y40), oil filtration joint 8016 (receiving PLC output Y46), differential lock joint 8017 (receiving PLC output Y31), chassis Oil-pressure joint 8018 (receiving PLC output Y30), empty filtration resistance plug joint 8019 (receiving PLC output Y45) and neutral start joint 8020 (receiving PLC output Y35); Relay group 802 comprises first to the 8th relay 8021-8028; Feedback joint group 803 comprises first to the 9th feedback joint 8031-8039; Wherein:
When PLC output Y33 connected, compressor (mapping address X18) had feedback signal, explained that the dry detection of liquid storage is qualified, otherwise defective; When PLC output Y33 disconnection, when first relay 8021 is connected, loudspeaker, dipped headlights, infrabar or compressor (mapping address: X08, X09, X16, X18) have feedback signal, explain that detection is qualified, otherwise defective; When PLC output Y33 disconnection, when first relay 8021 is disconnected, it is qualified that night lamp or dipped headlights (mapping address: X0A, X0B) have the feedback signal explanation to detect, otherwise defective; If logical front connector feedback (mapping address: X08-X0B) all feed back, and then the wire harness ground strap detects defective by no signal;
When second relay 8022 was disconnected, (mapping address: there X00) have feedback signal then to detect to be qualified, and no feedback signal does not have working power, jumps out detection for excitation; When second relay 8022 was connected, iron inhaled by starter or generator (mapping address: X17, X1E) has the feedback signal detection qualified, and no feedback signal detects defective;
When the 3rd relay 8023 was disconnected, (mapping address: there X07) have feedback signal to detect to be qualified, and no feedback signal detects defective for flame-out solenoid valve; When the 3rd relay 8023 was connected, (mapping address: there X19) have feedback signal to detect to be qualified, and no feedback signal detects defective in reversing;
Connect when the 3rd relay 8023, when the 4th relay 8024 was disconnected, it is qualified that left brake, left steering or right brake (mapping address: X04, X05, X06) have feedback signal to detect, otherwise detect defective; Connect when the 3rd relay 8023, when the 4th relay 8024 was connected, it is qualified that right turn, rear running light or lamp at night (mapping address: X01, X02, X03) have feedback signal to detect, otherwise detect defective; If the logical back of 12N wire harness feedback (mapping address: X01-X06) equal no signal feedback, then the wire harness ground strap detects defective;
When the 5th relay 8025 was connected, (mapping address: there X0D) have feedback signal to detect to be qualified, and no feedback signal detects defective for P0T (PTO);
When the 6th relay 8026 was connected, (mapping address: there X0C) have feedback signal to detect to be qualified, and no feedback signal detects defective for 4WD (four-wheel drive);
When PLC output Y30 connected, (mapping address: X1D) no feedback signal detection was qualified, and there have feedback signal to detect to be defective for the chassis oil pressure;
When the 7th relay 8027 was disconnected, (mapping address: there X15) have feedback signal to detect to be qualified, and no feedback signal detects defective for empty filtration resistance plug; When the 7th relay 8027 was connected, (mapping address: there X14) have feedback signal to detect to be qualified, and no feedback signal detects defective for heater plug;
When the 8th relay 8028 was connected, (mapping address: there X0E) have feedback signal to detect to be qualified, and no feedback signal detects defective for differential lock.
In sum, the utility model is accomplished the self check to tractor driving cabin test macro through to the reception of PLC output and the mapping that PLC is imported, thereby guarantees that test macro itself is no problem.
Above embodiment only supplies to explain the usefulness of the utility model; But not to the restriction of the utility model; The technician in relevant technologies field under the situation of the scope that does not break away from the utility model, can also make various conversion or modification; Therefore all technical schemes that are equal to also should belong to the category of the utility model, should be limited each claim.
Claims (1)
1. switching frame, photoelectrical coupler, network resistor circuit, self-checking circuit, programmable power supply and Switching Power Supply that self-checking circuit that is used for tractor driving cabin test macro, said tractor driving cabin test macro comprise industrial computer, PLC, are made up of external input signal joint, external control joint and water temperature/Oil-pressure joint; The said external input signal joint of the input termination of said PLC, the output said external control joint of termination and water temperature/Oil-pressure joint; Said self-checking circuit connects said switching frame, it is characterized in that, said self-checking circuit comprises self check joint group, relay group and the feedback joint group of joining successively, wherein:
Said self check joint group comprises some self check joints, and this self check joint group connects said external control joint and water temperature/Oil-pressure joint;
Said feedback joint group comprises some feedback joints, and this feedback joint group connects said external input signal joint;
Said relay group comprises some relays, and each relay receives the output of said PLC through each self check joint of correspondence, realizes the adhesive or the disconnection of each relay contact, accomplishes the mapping to said PLC input through the joint that respectively feeds back of correspondence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220218740 CN202631264U (en) | 2012-05-15 | 2012-05-15 | Self-checking circuit for tractor cab testing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220218740 CN202631264U (en) | 2012-05-15 | 2012-05-15 | Self-checking circuit for tractor cab testing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202631264U true CN202631264U (en) | 2012-12-26 |
Family
ID=47384455
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220218740 Expired - Fee Related CN202631264U (en) | 2012-05-15 | 2012-05-15 | Self-checking circuit for tractor cab testing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202631264U (en) |
-
2012
- 2012-05-15 CN CN 201220218740 patent/CN202631264U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121226 Termination date: 20140515 |