CN203930084U - Medium detector - Google Patents
Medium detector Download PDFInfo
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- CN203930084U CN203930084U CN201420176307.2U CN201420176307U CN203930084U CN 203930084 U CN203930084 U CN 203930084U CN 201420176307 U CN201420176307 U CN 201420176307U CN 203930084 U CN203930084 U CN 203930084U
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- type sensor
- capacitance type
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- medium detector
- control device
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- 239000003990 capacitor Substances 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 9
- 230000005284 excitation Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000002787 reinforcement Effects 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 238000007689 inspection Methods 0.000 description 4
- 230000010287 polarization Effects 0.000 description 4
- 229910052602 gypsum Inorganic materials 0.000 description 3
- 239000010440 gypsum Substances 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004304 visual acuity Effects 0.000 description 3
- 238000005034 decoration Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 238000010009 beating Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
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Abstract
The utility model discloses a kind of medium detector, the capacitance type sensor and the control device that comprise asic chip and be connected with asic chip, the display device being connected with control device and sound device; Asic chip comprises with described capacitance type sensor and being connected, for export the pulse signal that a frequency changes along with capacitance type sensor electric capacity free-running multivibrator, be connected with free-running multivibrator, be used for the impulse meter of the frequency of obtaining pulse signal, the output terminal of impulse meter is connected with control device, and control device does classification display and sends the sound according to frequency values control display device and the sound device of impulse meter output.The circuit structure of this medium detector inside is simple, can reduce the difficulty of circuit design and the cost of product, but also can detect accurately the position of interior of articles medium and the water percentage of timber.
Description
Technical field
The utility model relates to medium field of detecting, particularly relates to a kind of medium detector.
Background technology
For surveying detection instrument at the besieged medium of object, be widely used in handicraft and interior decoration field, for example, for measuring the position of electric wire or water pipe or reinforcement of interior of articles.The most discrete parts that adopt of existing medium detector, discharging and recharging RC circuit by a lot of digital circuits forms, form RC pulse width, passive change pulse width variation, then become voltage by pulse width wave shaping, again by digital discharge circuit chip, the magnitude of voltage that reads above-mentioned voltage detects the position of interior of articles medium, and the structure of the circuit of this medium detector is comparatively complicated, and element is many, consistance is poor, cause product quality unreliable, the cost of product is higher.
Utility model content
The purpose of this utility model is that the circuit structure in order to overcome above-mentioned medium detector is comparatively complicated, and element is many, consistance is poor, causes product quality unreliable, and the deficiency that cost is higher provides a kind of medium detector.
A kind of medium detector that the utility model provides, the capacitance type sensor and the control device that comprise asic chip and be connected with described asic chip, the display device and the sound device that are connected with described control device;
Described asic chip comprises with described capacitance type sensor and being connected, for export the pulse signal that a frequency changes along with capacitance type sensor electric capacity free-running multivibrator, be connected with described free-running multivibrator, be used for the impulse meter of the frequency of obtaining pulse signal, the output terminal of described impulse meter is connected with described control device, and described control device does classification display and sends the sound according to display device described in the frequency values control of described impulse meter output and described sound device.
On the basis of technique scheme, described capacitance type sensor comprises at least high frequency polarized plate-shaped antenna, capacitor board and the resistance of one or two or more sets of, one end of described capacitor board is connected with described high frequency polarized plate-shaped antenna, the other end is connected to an input end of described free-running multivibrator by described resistance, the node of described capacitor board and described resistance is connected to an output terminal of described free-running multivibrator, and every group of corresponding free-running multivibrator of high frequency polarized plate-shaped antenna, capacitor board and resistance.
On the basis of technique scheme, described asic chip also comprises with described impulse meter and being connected, for storing the register of frequency values of described pulse signal.
On the basis of technique scheme, described impulse meter comprises that, for the timer of timing and the counter for counting, described timer and described counter are electrically connected successively.
On the basis of technique scheme, described display device comprises light emitting diode and LCD Panel.
On the basis of technique scheme, described sound device comprises hummer.
Compared with prior art, the utlity model has following advantage:
(1) asic chip of the medium detector design that the utility model provides makes the circuit structure of medium detector inside simple, has reduced the difficulty of circuit design and the cost of medium detector.
(2) capacitance type sensor adopting in this medium detector comprises at least two group high frequency polarized plate-shaped antennas, capacitor board and resistance, if form matrix by many groups of high frequency polarized plate-shaped antenna, capacitor board and the resistance for sensing, when reaching certain resolving power, can there is a physical dimension identification clearly to the medium of interior of articles, thereby can detect accurately the position of interior of articles medium.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model embodiment.
Fig. 2 is the structural representation of capacitance type sensor inside in the utility model embodiment.
Reference numeral: 1-capacitance type sensor, 2-asic chip, 3-control device, 4-display device, 5-sound device, 2a-free-running multivibrator, 2b-impulse meter, 2c-register.
Embodiment
Below in conjunction with drawings and the specific embodiments, the utility model is described in further detail.
Shown in Figure 1, capacitance type sensor 1 and control device 3 that the utility model embodiment provides a kind of medium detector to comprise asic chip 2 and be connected with asic chip 2, the display device 4 being connected with control device 3 and sound device 5; Asic chip 2 comprises with capacitance type sensor 1 and being connected, for export the pulse signal that a frequency changes along with capacitance type sensor electric capacity free-running multivibrator 2a, be connected with free-running multivibrator 2a, be used for the impulse meter 2b of the frequency of obtaining pulse signal, the output terminal of impulse meter 2b is connected with control device 3, and control device 3 does classification display and sends the sound according to frequency values control display device 4 and the sound device 5 of impulse meter 2b output.Asic chip 2 also comprises with impulse meter 2b and being connected, for the register 2c of the frequency values of storage pulse signal.
When the start of above-mentioned medium detector is on body surface when self-inspection, free-running multivibrator 2a sends an excitation pulse signal to capacitance type sensor 1, capacitance type sensor 1 is exported an electric capacity according to excitation pulse signal and is fed back to free-running multivibrator 2a, make free-running multivibrator 2a export a metastable frequency, and the frequency of obtaining signal by impulse meter 2b is kept in register 2c as school null value; When medium detector moves and when density that interior of articles medium detected changes at body surface, the electric capacity of capacitance type sensor 1 can change, make a frequency signal that the new density with interior of articles medium changes of free-running multivibrator 2a output, show that by counter the frequency values of this signal the difference according to this frequency values and school null value make control device 3 export a control signal again, do classification display and send the sound for display device 4 and sound device 5.
Shown in Figure 2, capacitance type sensor 1 comprises at least high frequency polarized plate-shaped antenna, capacitor board and the resistance of one or two or more sets of, one end of capacitor board is connected with high frequency polarized plate-shaped antenna, the other end is connected to an input end of free-running multivibrator by resistance, the node of capacitor board and resistance is connected to an output terminal of free-running multivibrator 2a, and every group of corresponding free-running multivibrator 2a of high frequency polarized plate-shaped antenna, capacitor board and resistance.Here it should be noted that as adapting to varying environment or product structure, the tissue of adjustable above-mentioned resistance when production, change the frequency of asic chip 2 inner free-running multivibrator 2a, to high frequency polarized plate-shaped antenna transmitting radiowave, to adapt to the compatibility of utilization of wider model.
Impulse meter 2b comprises that timer sum counter is electrically connected successively for the timer of timing and the counter for counting.Display device 3 comprises light emitting diode and LCD Panel; Sound device 4 comprises hummer.
The asic chip 2 of the medium detector design that the utility model embodiment provides makes the circuit structure of medium detector inside simple, the difficulty of circuit design and the cost of medium detector are reduced, the result that this medium detector can detect medium is processed, taking the school null value of body surface self-inspection as reference, detect edge and the central point of interior of articles reinforcement, specifically be quantized into intensity rank by display device and sound device, and digital quantity changes into Media density, the position changing with this accurate judgment object interior media, to a single object, above-mentioned density is also convertible into object purity and water percentage.
In addition, the capacitance type sensor adopting in this medium detector comprises at least two group high frequency antenna polarization capacity plate and resistance, if form matrix by many groups of high frequency antenna polarization capacity plate and the resistance for sensing, when reaching certain resolving power, can there is a physical dimension identification clearly to the medium of interior of articles, thereby can detect accurately the position of interior of articles medium.
The principle of work of the medium detector that the utility model embodiment provides is elaborated as follows:
Interior decoration or install an air-conditioner unavoidably burrows on gypsum board wall, and naked eyes cannot also can not be seen its inner structure clearly, as blindly burrowed, probably beat less than reinforcements such as the wooden frames in body of wall, mechanical insufficient strength is installed like this, causes and fall, collapse etc., bring very large loss.Therefore the accurate location of, preferably first verifying the reinforcement such as wooden frame in gypsum board wall with detector before burrowing on gypsum board wall is for well.The medium detector that uses the utility model embodiment to provide can be surveyed the position of the inner reinforcement of body of wall accurately, avoid beating on the wooden frame less than body of wall when burrowing, and make to install mechanical insufficient strength, and cause falling, collapse etc., cause the loss of not retrieving.
When use, after medium detector start, its capacitance type sensor 1 is carried out to self-inspection near the surface of wall that needs detection, free-running multivibrator 2a sends an excitation pulse signal to capacitance type sensor 1, capacitance type sensor 1 is exported an electric capacity according to excitation pulse signal and is fed back to free-running multivibrator 2a, make free-running multivibrator 2a export a frequency signal, and the frequency of obtaining signal by impulse meter 2b is kept in register 2c as school null value.Medium detector moves at body surface, in the time having timber near capacitance type sensor 1, the Media density of body of wall inside can change, cause the electric capacity of capacitance type sensor 1 to change, make a signal that frequency changes with the density of body of wall interior media of free-running multivibrator 2a output, now illustrate that there is timber this body of wall inside, place, then show that by counter the frequency values of this signal the difference according to this frequency values and school null value make control device export a control signal, control the light emitting diode in display device 4, hummer in LCD Panel and sound device 5 does classification display and sends the sound, we can find out accurately according to the classification display of display device 4 and sound device 5 and the sound sending the center of timber in body of wall.In like manner, if form matrix by many groups of high frequency antenna polarization capacity plate and the resistance for sensing, when reaching certain resolving power, can be to the physical dimension of the medium of interior of articles, there is an identification clearly.
In like manner, the medium detector that the utility model embodiment provides can also be applied to the detection of moisture content.Its principle is mainly that the medium DIELECTRIC CONSTANT ε between electric capacity and its two-plate of capacitor board of high frequency antenna polarization is proportional.In the time that the water percentage of timber is different, also respective change of its specific inductive capacity, the variation that is also directly proportional to ε of the electric capacity of the capacitor board taking timber as medium, the specific inductive capacity of timber increases with the increase of water percentage.Utilize this dry density characteristic of timber, by recording the electric capacity of capacitor board, the variation that is converted to pulse signal frequency through the variation of asic chip 2 electric capacitys obtains the water percentage of timber indirectly.
Particularly, when use, after medium detector start, its capacitance type sensor 1 is carried out to self-inspection near the wood surface that needs detection, free-running multivibrator 2a sends a radio-frequency excitation pulses signal to capacitance type sensor 1, capacitance type sensor 1 is exported an electric capacity according to excitation pulse signal and is fed back to free-running multivibrator 2a, makes free-running multivibrator 2a export a frequency signal, and obtains pulsed frequency by impulse meter 2b and be kept in register 2c as school null value.Capacitance type sensor 1 moves at wood surface, and the electric capacity changing according to the number of timber inside water percentage, make a signal that pulse width changes with the variation of this electric capacity of free-running multivibrator 2a output, then obtain the frequency values of this signal by counter and the school null value in frequency values and register 2c is carried out after difference computing, make control device 3 export a control signal according to difference between the two, control the light emitting diode in display device 4, hummer in LCD Panel and sound device 5 does classification display and sends the sound, draw the water percentage of timber each several part according to this classification display and the sound sending.
In summary it can be seen, the circuit structure of the medium detector inside that the utility model provides is simple, can reduce the difficulty of circuit design and the cost of product, but also can detect accurately the position of interior of articles medium and the water percentage of timber.
Those skilled in the art can carry out various modifications and variations to the utility model embodiment; if these amendments and modification belong within the scope of the utility model claim and equivalent technologies thereof, these amendments and modification are also within protection domain of the present utility model.The prior art that the content of not describing in detail in instructions is known to the skilled person.
Claims (6)
1. a medium detector, is characterized in that, the capacitance type sensor and the control device that comprise asic chip and be connected with described asic chip, the display device and the sound device that are connected with described control device;
Described asic chip comprises with described capacitance type sensor and being connected, for export the pulse signal that a frequency changes along with capacitance type sensor electric capacity free-running multivibrator, be connected with described free-running multivibrator, be used for the impulse meter of the frequency of obtaining pulse signal, the output terminal of described impulse meter is connected with described control device, and described control device does classification display and sends the sound according to display device described in the frequency values control of described impulse meter output and described sound device.
2. medium detector as claimed in claim 1, it is characterized in that: described capacitance type sensor comprises at least high frequency polarized plate-shaped antenna, capacitor board and the resistance of one or two or more sets of, one end of described capacitor board is connected with described high frequency polarized plate-shaped antenna, the other end is connected to an input end of described free-running multivibrator by described resistance, the node of described capacitor board and described resistance is connected to an output terminal of described free-running multivibrator, and every group of corresponding free-running multivibrator of high frequency polarized plate-shaped antenna, capacitor board and resistance.
3. medium detector as claimed in claim 2, is characterized in that: described asic chip also comprises with described impulse meter and being connected, for storing the register of frequency values of described pulse signal.
4. medium detector as claimed in claim 3, described impulse meter comprises that, for the timer of timing and the counter for counting, described timer and described counter are electrically connected successively.
5. medium detector as claimed in claim 4, described display device comprises light emitting diode and LCD Panel.
6. medium detector as claimed in claim 5, described sound device comprises hummer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420176307.2U CN203930084U (en) | 2014-04-11 | 2014-04-11 | Medium detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420176307.2U CN203930084U (en) | 2014-04-11 | 2014-04-11 | Medium detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203930084U true CN203930084U (en) | 2014-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420176307.2U Expired - Lifetime CN203930084U (en) | 2014-04-11 | 2014-04-11 | Medium detector |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106154336A (en) * | 2016-06-28 | 2016-11-23 | 漳州市东方智能仪表有限公司 | A kind of circuit detecting medium below plasterboard and method |
| CN108445051A (en) * | 2018-05-17 | 2018-08-24 | 浩辰弘明（北京）科技有限公司 | A kind of online device for testing moisture content of wood |
-
2014
- 2014-04-11 CN CN201420176307.2U patent/CN203930084U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106154336A (en) * | 2016-06-28 | 2016-11-23 | 漳州市东方智能仪表有限公司 | A kind of circuit detecting medium below plasterboard and method |
| CN106154336B (en) * | 2016-06-28 | 2017-12-12 | 漳州市东方智能仪表有限公司 | The circuit and method of medium below a kind of detection plasterboard |
| CN108445051A (en) * | 2018-05-17 | 2018-08-24 | 浩辰弘明（北京）科技有限公司 | A kind of online device for testing moisture content of wood |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141105 |
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| CX01 | Expiry of patent term |