CN1332098A - Vehicle loaded densification degree detector - Google Patents
Vehicle loaded densification degree detector Download PDFInfo
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- CN1332098A CN1332098A CN 01114573 CN01114573A CN1332098A CN 1332098 A CN1332098 A CN 1332098A CN 01114573 CN01114573 CN 01114573 CN 01114573 A CN01114573 A CN 01114573A CN 1332098 A CN1332098 A CN 1332098A
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Abstract
The vehicle loaded densification degree detector for expressway construction includes power supply circuit, oscillation and amplifier circuit and shaping and DAC circuit. It has piezoelectric ceramic acceleration sensor and two-point regulation to make the linearity of region accord with the engineering requirement. The present invention has simple structure, fast system response, good stability, high detection accuracy and high efficiency.
Description
Technical field
The present invention relates to a kind of electronic equipment, feature is a kind of vehicle loaded densification degree detector.
Background technology
At present, in expressway construction, a directly main indication-degree of compaction of reflection roadbed quality is arranged.China continues to use traditional filling micromicrofarad and core cutter method etc. and takes out experimental tests method check degree of compaction in construction, speed is slow, and the personnel that take are many, and wear and tear expense is big.Human element is also many, becomes a principal element of restriction construction speed, also is difficult to comprehensive guarantee highway subgrade quality.Still may there be inferior-quality hidden danger in the highway section that (because of it is a kind ofly to adopt the point sampling mode, and the road surface is big, can not the some point all to) promptly calculates acceptance(check).
Summary of the invention
The object of the present invention is to provide a kind of simple in structurely, technical standard is good, and the system dynamics response is fast, and stability is good, the high vehicle loaded densification degree detector of reflection accuracy.
The objective of the invention is to realize: vehicle loaded densification degree detector by following approach, it comprises power circuit, oscillator-amplification circuit and shaping D/A converting circuit, it obtains signal by sensor SEN and delivers to U3A the 3rd pin by C3, amplify the back and output to OUT1 from 1 pin, deliver to 3 pin of U5A by change-over swith S1, amplify the back and delivers to 2 pin of U7B and 6 pin of U5B respectively through C3 from the output of 1 pin;
2 pin by U7B, after 6 pin of delivering to U7D from the output of 1 pin of U7B after the shaping obtain oppositely, 6 pin of delivering to U6 from the 7 pin output of U7C carry out pressing frequently the conversion back to deliver to 12 pin of U7A from the output of 1 pin, from the output of 14 pin, deliver to the vibration frequency of operation that the indication dial plate shows roller behind the emitter following through R31;
Deliver to 6 pin of U5B by R11, deliver to 10 pin of U5C after voltage gain and the rectification, from the output of the 8th pin, show degree of compaction to dial plate behind the emitter following through R19;
The scalable signal generation circuit of being made up of U8A, U8B etc. provides a calibration signal for the degree of compaction adjustment;
Produce an AC signal by UBA vibration, its oscillation frequency is adjusted by R53 and is changed, and delivers to 13 pin of U8B from the output of 8 pin, amplifies the back and outputs to 0UT2 from 14 pin, and the output size is adjusted by RW2 and changed;
The DC regulated power supply of being made up of U11, M1, T2, U9, U10 etc. provides working power for complete machine.
Vehicle loaded densification degree detector of the present invention has following characteristics: 1. adopting piezoceramic is acceleration pick-up, when vibrating roller is constructed with the certain frequency vibration, when its pinch roller clashes into different degree of compaction road surface, can produce corresponding different acceleration/accels, and this acceleration/accel has applied cooresponding mechanical force to piezoceramic, and this mechanical force makes sensor export cooresponding electric signal, the frequency of electric signal is consistent with the frequency of vibrating wheels, after frequency is carried out the conversion of frequency pressure, just can indicate the oscillation frequency of this roller.In addition, degree of compaction is bigger, and is bigger to vibrating wheels and effect, thereby the acceleration/accel that produces is bigger, thereby the electric signal that obtains is stronger, and the electric signal that conversion is got is to amplify, after linear, precision handles, can show cooresponding degree of compaction.2. adopt 2 adjustings (by RW1, RW3) to make the linearity in 90%-95% interval meet national ministerial standard and requirement.3. adopt to adjust RW1 and change magnification factor at the corresponding levels, make the drive pressure solidity test indicator index lattice that move import the indicated actual degree of compaction official post sensor OUT1 of required voltage difference and every lattice at IN point to order the cooresponding voltage difference that produced consistent.4. the 33HZ that adopts U8A, U8B circuit composition is from the adjustable AC signal of 0-IV.Enter from S1 that the degree of compaction adjustment for this machine provides more accurate signal behind the IN, make roller at random accurate adjustment of loaded densification degree detector be achieved.5. according to the standing order of Ministry of Communication, adjusting the highway degree of compaction standard is 90%-95%, therefore, makes the indication of degree of compaction dial plate from 80%-100%, thereby makes the readable precision of indication bring up to 0.2% from 1%.
Description of drawings
Below in conjunction with accompanying drawing the present invention is described in further detail:
Fig. 1 is a circuit block diagram of the present invention.
Fig. 2 is schematic circuit diagram of the present invention.
Concrete enforcement mode
As shown in Figure 1 and Figure 2, vehicle loaded densification degree detector of the present invention adopts piezoelectric ceramics Be acceleration sensor, because piezoelectric ceramics has the function of mechanical energy and the mutual conversion of electric energy, when Sensor SEN obtains exporting from 1 pin after signal is delivered to the amplification of U3A the 3rd pin by C3 To OUT1, by 3 pin that change-over switch S1 delivers to U5A, export warp from 1 pin after amplifying C3 delivers to 2 pin of U7B, exports 6 pin of delivering to U7D from 1 pin of U7B after the shaping and gets After shaping, 6 pin of delivering to U6 from the 7 pin output of U7C carry out the conversion of frequency pressure afterwards from 1 12 pin of U7A are delivered in pin output. From the output of 14 pin, deliver to finger through R31 behind the emitter following Show that dial plate shows the vibration work frequency of road roller; Simultaneously, sensor number after preposition amplification Deliver to 6 pin, voltage amplification and the rectification of U5B through C3, R11 from the 1 pin output of U5A After deliver to 10 pin of U5C, from the output of the 8th pin, show to dial plate through R19 behind the emitter following The compacting degree; Transferred for the compacting degree by the adjustable AC signal circuit for generating that U8A, U8B etc. forms Wholely provide a more accurate signal. Loaded densification degree detector is installed in road roller, records compacting When degree was 88.8%, sensor was output as 340MV; When the compacting degree was 92.1%, sensor was defeated Go out to be 400MV; To turn to 1 dozen of mould switch S in more accurate position, and adjust RW2 and make S1 output End is 340MV, adjusts RW3 and makes the compacting degree be designated as 88.8%; Adjusting RW2 makes S1 defeated Go out to be 400MV, adjust RW1, make the compacting degree be designated as 92.1%, repeatedly adjust, until 88.8%-340MV, 92.1%-400MV are fully corresponding, and its precision satisfies the compacting degree 0.5% error scope; The UBA vibration produces an AC signal, and then its frequency of oscillation is by R53 Adjust and change, deliver to 13 pin of U8B from the output of 8 pin, outputs to from 14 pin after amplifying OUT2, the output size is adjusted by RW2 and is changed. U11, M1, T2, U9, U10 etc. The DC voltage-stabilizing power supply that forms provides working power for complete machine.
Claims (1)
1. vehicle loaded densification degree detector, it comprises power circuit, oscillator-amplification circuit and shaping D/A converting circuit, it is characterized in that: obtain signal by sensor SEN and deliver to U3A the 3rd pin by C3, amplify the back and output to OUT1 from 1 pin, deliver to 3 pin of U5A by change-over swith S1, amplify the back and delivers to 2 pin of U7B and 6 pin of U5B respectively through C3 from the output of 1 pin;
2 pin by U7B, after 6 pin of delivering to U7D from the output of 1 pin of U7B after the shaping obtain oppositely, 6 pin of delivering to U6 from the 7 pin output of U7C carry out pressing frequently the conversion back to deliver to 12 pin of U7A from the output of 1 pin, from the output of 14 pin, deliver to the vibration frequency of operation that the indication dial plate shows roller behind the emitter following through R31;
Deliver to 6 pin of U5B by R11, deliver to 10 pin of U5C after voltage gain and the rectification, from the output of the 8th pin, show degree of compaction to dial plate behind the emitter following through R19;
The scalable signal generation circuit of being made up of U8A, U8B etc. provides a calibration signal for the degree of compaction adjustment;
Produce an AC signal by UBA vibration, its oscillation frequency is adjusted by R53 and is changed, and delivers to 13 pin of U8B from the output of 8 pin, amplifies the back and outputs to OUT2 from 14 pin, and the output size is adjusted by RW2 and changed;
The DC regulated power supply of being made up of U11, M1, T2, U9, U10 etc. provides working power for complete machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01114573 CN1332098A (en) | 2001-07-06 | 2001-07-06 | Vehicle loaded densification degree detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01114573 CN1332098A (en) | 2001-07-06 | 2001-07-06 | Vehicle loaded densification degree detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1332098A true CN1332098A (en) | 2002-01-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01114573 Pending CN1332098A (en) | 2001-07-06 | 2001-07-06 | Vehicle loaded densification degree detector |
Country Status (1)
| Country | Link |
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| CN (1) | CN1332098A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102535313A (en) * | 2010-11-26 | 2012-07-04 | 宝马格有限公司 | Drivable device for compacting a soil layer structure and method for ascertaining a layer modulus of elasticity of an uppermost layer of this soil layer structure |
-
2001
- 2001-07-06 CN CN 01114573 patent/CN1332098A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102535313A (en) * | 2010-11-26 | 2012-07-04 | 宝马格有限公司 | Drivable device for compacting a soil layer structure and method for ascertaining a layer modulus of elasticity of an uppermost layer of this soil layer structure |
| CN102535313B (en) * | 2010-11-26 | 2014-12-24 | 宝马格有限公司 | Drivable device for compacting a soil layer structure and method for ascertaining a layer modulus of elasticity of an uppermost layer of this soil layer structure |
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| C06 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| REG | Reference to a national code |
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