CN202903363U - Temperature measuring instrument for large-scale object - Google Patents
Temperature measuring instrument for large-scale object Download PDFInfo
- Publication number
- CN202903363U CN202903363U CN 201220624309 CN201220624309U CN202903363U CN 202903363 U CN202903363 U CN 202903363U CN 201220624309 CN201220624309 CN 201220624309 CN 201220624309 U CN201220624309 U CN 201220624309U CN 202903363 U CN202903363 U CN 202903363U
- Authority
- CN
- China
- Prior art keywords
- triode
- resistance
- positive
- power supply
- measuring instrument
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
Images
Landscapes
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The utility model discloses a temperature measuring instrument for large-scale objects. The temperature measuring instrument comprises a quartz temperature measuring instrument including a quartz temperature sensor (1), an oscillator (2), a pre-amplifier (3), a mixer (4), a waveshaping circuit (5), and a fundamental frequency oscillator (6). The mixer (4) is connected and formed by four resistors of first resistor (R1)-fourth resistor (R4), and a triode (BG). The triode (BG) in the mixer (4) is connected in an invert manner, and work state of the triode (BG) in the mixer (4) is non-amplified work state. The pre-amplifier (3) is connected with the triode (BG) through a signal transmission line (7) whose length is 1-25m. The temperature measuring instrument is advantaged by simple structure and large range for measuring objects, and is also advantaged by high measurement precision and high operational reliability. When the length of the signal transmission line is 25m, error of measurement precision is <=0.1 DEG C.
Description
Technical field
The utility model relates to a kind of large scale object temperature measuring instrument, and particularly a kind of large scale object temperature measuring equipment based on quartz temperature sensor belongs to quartz temperature surveying instrument technical field.
Background technology
At present, based on the quartz temperature measuring instrument of quartz temperature sensor, be usually used in the high-precision automatic measuring of temperature.Because quartz temperature sensor is that the principle of utilizing its resonance frequency to be directly proportional with temperature is measured temperature, so will provide oscillation source to quartz temperature sensor, again because the quartz oscillation frequency is very little with the relative variation of temperature, so will adopt the method for mixing that useful signal is proposed.For the large scale testee, realize its temperature survey, used method has following several usually in the prior art:
1, the lead-in wire between lengthening quartz temperature sensor and the oscillator.Because the load capacity of quartz temperature sensor is very little, and the signal transmit leg between the oscillatory circuit is long, can cause that then the lead-in wire stray capacitance is excessive, namely increased the load of sensor, cause the blocking of oscillator, can not realize measuring, so the length of its signal transmssion line generally is no more than 1 meter, its measurement range is generally below 1m;
2, oscillator and prime amplifier and quartz temperature sensor are integrated, improving the load capacity of quartz temperature sensor, and then amplifying signal is sent the frequency mixer of the rear utmost point.Even so, when the signal transmit leg was long between the preposition utmost point that integrates and the frequency mixer, its stray capacitance was excessive, also can make preposition utmost point failure of oscillation, so the also scope about 1m only of the measurement range of this method;
3, the circuit of the signal of whole thermometric instruments being processed all is integrated on the probe, although this can solve lead-in wire and lengthen the blocking of oscillator problem that makes, but its measuring instrument rapier volume is increased, when contacting with testee with this measurement rapier, can change the state of temperature of testee, make and measure the temperature misalignment.Simultaneously, because the rapier volume is large, be not easy to measure very much operation.
From above-mentioned analysis as can be known, at present the quartz temperature measuring instrument based on quartz temperature sensor of the prior art for the effect of large scale object thermometric or not ideal enough.
Summary of the invention
The purpose of this utility model provide a kind of simple in structure, measure all high large scale object temperature measuring instruments of the large and measuring accuracy of object range scale and functional reliability, to overcome the deficiencies in the prior art.
The technical solution of the utility model is to consist of like this, a kind of large scale object temperature measuring instrument of the present utility model is, this measuring instrument comprises the quartz temperature measuring instrument that is made of quartz temperature sensor, oscillator, prime amplifier, frequency mixer, shaping circuit and base frequency oscillation device, its frequency mixer is connected to form by the first resistance～four resistance of the 4th resistance and a triode, triode in its frequency mixer is the connection that is inverted, and namely the duty of the triode in the frequency mixer is non-amplification duty; And prime amplifier is that 1～25 meter signal transmssion line is connected with triode by length.
Described triode is NPN type or positive-negative-positive triode, and when described triode was NPN type triode, the emitter of this NPN type triode was connected with the positive pole of power supply by the 3rd resistance, and the collector of this NPN type triode connects the negative pole of power supply by the 4th resistance; When described triode was the positive-negative-positive triode, the emitter of this positive-negative-positive triode was connected with the negative pole of power supply by the 3rd resistance, and the collector of this positive-negative-positive triode connects the positive pole of power supply by the 4th resistance; The base stage of triode and the first resistance be connected an end of resistance and be connected, and be connected with the electrical signal of prime amplifier with signal transmssion line by the first electric capacity, another termination power of the first resistance anodal also is connected the negative pole of another termination power of the second resistance by signal transmssion line with prime amplifier; The signal output part of base frequency oscillation device connects the negative pole of power supply by the second electric capacity and the 4th resistance, and the signal input part of shaping circuit connects the positive pole of power supply by the 3rd resistance.
Between the negative pole of the signal input part of above-mentioned shaping circuit and power supply, be connected with the 4th electric capacity.
Between the positive pole of above-mentioned power supply and negative pole, be connected with the 3rd electric capacity.
Above-mentioned quartz temperature sensor, oscillator, prime amplifier are integrated on the surface-mounted integrated circuit, and draw signal transmssion line by prime amplifier, exit at signal transmssion line is connected with the plug wire joint, frequency mixer, shaping circuit and base frequency oscillation device and power supply all are installed in the box body, be provided with the plug wire interface that is connected for the plug wire joint at box body, and the terminals of plug wire interface are connected with positive pole, the negative pole of power supply and the electric capacity of being connected respectively.
Above-mentioned triode is NPN type triode.
The model of above-mentioned triode is 3DG12.
Owing to adopted technique scheme, the utility model uses traditional quartz temperature sensor as detector unit, and existing oscillator and prime amplifier and sensor integrated, effectively solved as the excessive problem of the detector volume of thermometric instruments.Frequency mixer of the present utility model adopts the 3DG12 triode to make the mixing element, and the circuit of its collector and emitter connects opposite with traditional frequency mixer connected mode, and connection namely is inverted.Usually triode is to be under the positive configuration state to work, and refers to that for the positive configuration state of NPN type triode the triode collector connects the positive terminal of power supply, and the grounded emitter end utilizes two PN junctions of triode to mix the concentration difference and makes triode be in the amplification duty.If be inverted, both connect power positive end for NPN type triode triode emitter, its collector connects negative pole ground end, and triode does not have enlarging function like this.Utility model people of the present utility model studies discovery by analysis, because in thermometric instruments, the triode in its frequency mixer mainly is for mixing, its enlarging function is not main, so inventor of the present utility model with its connection that is inverted, need not the enlarging function of this triode.Show by actual measurement: when the signal transmssion line of front end surpassed 1m if triode is just being put, frequency mixer is cisco unity malfunction then, if be inverted, even then lead-in wire also can work above 20m.The utility model is by state work that triode is inverted, and realized under the high precision condition measurement of large scale object temperature has been overcome the difficult point of above-mentioned high precision large scale object thermometric effectively.The results showed, adopt the quartz temperature measuring instrument based on quartz temperature sensor of the utility model made, it is by quartz temperature sensor, oscillator, prime amplifier integrates the volume of temp probe of composition, and very little (volume of its temp probe is 30 * 10 * 3mm, if necessary, that can also do is less), its the probe with by frequency mixer, shaping circuit and base frequency oscillation device are connected with power supply in the box body and the length of the signal transmssion line that the main frame that forms connects can reach 25m, and when the length of signal transmssion line is 25m, the error of its measuring accuracy≤± 0.1 ℃.So, the utility model compared with prior art, that the utility model not only has is simple in structure, measure the advantage that the object range scale is large, cost is low, but also has all high advantages of measuring accuracy and functional reliability.
Description of drawings
Fig. 1 is circuit theory synoptic diagram of the present utility model.
Accompanying drawing 2 description of symbols: 1-quartz temperature sensor, 2-oscillator, 3-prime amplifier, 4-frequency mixer, the 5-shaping circuit, 6-base frequency oscillation device, 7-signal transmssion line, the BG-triode, R1-the first resistance, R2-the second resistance, R3-the 3rd resistance, R4-the 4th resistance, C1-the first electric capacity, C2-the second electric capacity, C3-the 3rd electric capacity, C4-the 4th electric capacity, the E-power supply, J1-plug wire joint, J2-plug wire interface.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
Embodiment of the present utility model: the utility model is constructed according to following a kind of large scale object temp measuring method based on quartz temperature sensor, the method is to improve enforcement on the basis of existing quartz temperature measuring instrument based on quartz temperature sensor, the method comprises that employing is existing by quartz temperature sensor 1, oscillator 2, prime amplifier 3, frequency mixer 4, the quartz temperature measuring instrument that shaping circuit 5 and base frequency oscillation device 6 consist of is measured object temperature, when adopting the quartz temperature measuring instrument to measure object temperature, connection in advance is inverted the triode BG in the frequency mixer 4, make the triode BG in the frequency mixer 4 when work, be in non-amplification duty, namely when the triode BG in the frequency mixer 4 is NPN type triode, the emitter of this NPN type triode is connect the positive pole of power supply, the collector of this NPN type triode is connect the negative pole of power supply; When the triode BG in the frequency mixer 4 is the positive-negative-positive triode, the emitter of this positive-negative-positive triode is connect the negative pole of power supply, the collector of this positive-negative-positive triode is connect the positive pole of power supply; Then the electrical output signal of prime amplifier 3 is connected to the signal input part of frequency mixer 4 by the signal transmssion line 7 more than 1 meter, can adopts like this quartz temperature measuring instrument to come the object of large scale is carried out thermometric.
The of the present utility model a kind of large scale object temperature measuring instrument that makes up according to said method is: this device comprises existing by quartz temperature sensor 1, oscillator 2, prime amplifier 3, frequency mixer 4, the quartz temperature measuring instrument that shaping circuit 5 and base frequency oscillation device 6 consist of, its quartz temperature sensor 1, oscillator 2, prime amplifier 3, frequency mixer 4, shaping circuit 5 all adopts finished product module of the prior art to assemble into the quartz temperature measuring instrument with base frequency oscillation device 6, during making, the existing frequency mixer 4 that is connected to form by the first resistance R 1～4 four resistance of the 4th resistance R and triode BG is reequiped, be about to triode BG in the frequency mixer 4 connection that is inverted, the duty that makes the triode BG in the frequency mixer 4 is non-amplification duty; Namely when triode BG is NPN type triode, the emitter of this NPN type triode is connected with the positive pole of power supply E by the 3rd resistance R 3, the collector of this NPN type triode is connect the negative pole of power supply E by the 4th resistance R 4; When triode BG is the positive-negative-positive triode, the emitter of this positive-negative-positive triode is connected with the negative pole of power supply E by the 3rd resistance R 3, the collector of this positive-negative-positive triode is connect the positive pole of power supply E by the 4th resistance R 4; The base stage of triode BG and the first resistance R 1 be connected an end of resistance R 2 and be connected, and be connected with signal transmssion line by the first capacitor C 1 and be connected with the electrical signal of prime amplifier 3, be connected in a traditional way with prime amplifier 3 with the anodal of another termination power E of the first resistance R 1 and by signal transmssion line 7, with the negative pole of another termination power E of the second resistance R 2; The signal output part of base frequency oscillation device 6 is connect the negative pole of power supply E by the second capacitor C 2 and the 4th resistance R 4, the signal input part of shaping circuit 5 is connect in a traditional way the positive pole of power supply E by the 3rd resistance R 3; During making, the length of its signal transmssion line 7 can be made into 1～25 meter according to the needs that use; In order to reach better shielding interference effect, can between the negative pole of the signal input part of shaping circuit 5 and power supply E, be connected the 4th capacitor C 4, and between the positive pole of power supply E and negative pole, be connected with the 3rd capacitor C 3; For in use, convenient higher with measuring accuracy, can be with quartz temperature sensor 1, oscillator 2, prime amplifier 3 is integrated on the surface-mounted integrated circuit temp probe as surveying instrument by traditional integrated circuit manufacture method, and with an end of signal transmssion line 7 routinely connected mode be connected with prime amplifier 3, the other end of signal transmssion line 7 is connected a plug wire joint J1, then with frequency mixer 4, shaping circuit 5 and base frequency oscillation device 6 and power supply E are installed in the interior main frame as surveying instrument of a box body, install one at box body and be used for the plug wire interface J2 that is connected with plug wire joint J1, and with the terminals of plug wire interface J2 respectively with power supply E be connected capacitor C 1 and be connected.
During making, used triode BG preferably adopts NPN type triode, and it is the triode of 3DG12 that this NPN type triode can adopt the model of selling on the market, also can be according to the NPN type triode of the convenience of using and other model of requirement employing.Other element adopts SMD element to assemble.
Claims (7)
1. large scale object temperature measuring instrument, comprise the quartz temperature measuring instrument that is consisted of by quartz temperature sensor (1), oscillator (2), prime amplifier (3), frequency mixer (4), shaping circuit (5) and base frequency oscillation device (6), its frequency mixer (4) is connected to form by four resistance of the first resistance (R1)～the 4th resistance (R4) and a triode (BG), it is characterized in that: the triode (BG) in the frequency mixer (4) is the connection that is inverted, and namely the duty of the triode (BG) in the frequency mixer (4) is non-amplification duty; And prime amplifier (3) is that 1～25 meter signal transmssion line (7) is connected with triode (BG) by length.
2. large scale object temperature measuring instrument according to claim 1, it is characterized in that: triode (BG) is NPN type or positive-negative-positive triode, when described triode (BG) is NPN type triode, the emitter of this NPN type triode is connected with the positive pole of power supply (E) by the 3rd resistance (R3), and the collector of this NPN type triode connects the negative pole of power supply (E) by the 4th resistance (R4); When described triode (BG) was the positive-negative-positive triode, the emitter of this positive-negative-positive triode was connected with the negative pole of power supply (E) by the 3rd resistance (R3), and the collector of this positive-negative-positive triode connects the positive pole of power supply (E) by the 4th resistance (R4); The base stage of triode (BG) and the first resistance (R1) be connected an end of resistance (R2) be connected, and be connected 7 by the first electric capacity (C1) with signal transmssion line) be connected with the electrical signal of prime amplifier (3), the anodal of another termination power (E) of the first resistance (R1) also is connected the negative pole of another termination power (E) of the second resistance (R2) by signal transmssion line (7) with prime amplifier (3); The signal output part of base frequency oscillation device (6) connects the negative pole of power supply (E) by the second electric capacity (C2) and the 4th resistance (R4), and the signal input part of shaping circuit (5) connects the positive pole of power supply (E) by the 3rd resistance (R3).
3. large scale object temperature measuring instrument according to claim 1 is characterized in that: be connected with the 4th electric capacity (C4) between the negative pole of the signal input part of shaping circuit (5) and power supply (E).
4. large scale object temperature measuring instrument according to claim 1 is characterized in that: be connected with the 3rd electric capacity (C3) between the positive pole of power supply (E) and negative pole.
5. large scale object temperature measuring instrument according to claim 1, it is characterized in that: quartz temperature sensor (1), oscillator (2), prime amplifier (3) is integrated on the surface-mounted integrated circuit, and draw signal transmssion line (7) by prime amplifier (3), exit at signal transmssion line (7) is connected with plug wire joint (J1), frequency mixer (4), shaping circuit (5) and base frequency oscillation device (6) and power supply (E) all are installed in the box body, be provided with the plug wire interface (J2) that is connected for plug wire joint (J1) at box body, and the terminals of plug wire interface (J2) respectively with the positive pole of power supply (E), negative pole be connected electric capacity (C1) and connect.
6. large scale object temperature measuring instrument according to claim 1, it is characterized in that: triode (BG) is NPN type triode.
7. large scale object temperature measuring instrument according to claim 6, it is characterized in that: the model of triode (BG) is 3DG12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220624309 CN202903363U (en) | 2012-11-23 | 2012-11-23 | Temperature measuring instrument for large-scale object |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220624309 CN202903363U (en) | 2012-11-23 | 2012-11-23 | Temperature measuring instrument for large-scale object |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202903363U true CN202903363U (en) | 2013-04-24 |
Family
ID=48124022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220624309 Withdrawn - After Issue CN202903363U (en) | 2012-11-23 | 2012-11-23 | Temperature measuring instrument for large-scale object |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202903363U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102980677A (en) * | 2012-11-23 | 2013-03-20 | 贵州民族大学 | Temperature measuring method and device for large-scale objects based on quartz temperature sensor |
-
2012
- 2012-11-23 CN CN 201220624309 patent/CN202903363U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102980677A (en) * | 2012-11-23 | 2013-03-20 | 贵州民族大学 | Temperature measuring method and device for large-scale objects based on quartz temperature sensor |
| CN102980677B (en) * | 2012-11-23 | 2014-10-01 | 贵州民族大学 | Temperature measuring method and device for large-scale objects based on quartz temperature sensor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105355704B (en) | Symmetric double PIN balances photodetector | |
| CN101975893A (en) | Differential capacitance detection circuit based on instrument amplifier and detection method thereof | |
| CN102980677B (en) | Temperature measuring method and device for large-scale objects based on quartz temperature sensor | |
| CN202903363U (en) | Temperature measuring instrument for large-scale object | |
| CN103293566B (en) | Signal detection circuit of atmospheric ozone sonde | |
| CN108304023B (en) | High-load stability compensation circuit of switching power supply | |
| CN202007662U (en) | Direct-reading double temperature probe compensation pressure instrument | |
| CN211234441U (en) | Double-shaft gyroscope inertial sensor | |
| CN204496001U (en) | Laser range finder | |
| CN204740293U (en) | Capacitive sensor circuit | |
| CN103412194B (en) | Capacitance measuring and calculating circuit | |
| CN103954831A (en) | Average power measuring circuit and method for weak continuous wave signals | |
| CN204988567U (en) | Monocrystalline silicon formula pressure transmitter | |
| CN211626511U (en) | Sensor signal conditioning circuit and circuit board | |
| CN109946354B (en) | Air formaldehyde distributed cloud monitoring system and method | |
| CN204206117U (en) | A kind of amplifier of creatures' physical electric signals circuit of fast detector | |
| CN204129211U (en) | A kind of base passive and wireless multi-parameter sensor intelligent electric energy meter temperature rise detecting device | |
| CN204405840U (en) | A kind of high precision distance detector of double channel data acquisition | |
| CN104483503A (en) | Conditioning circuit capable of outputting stable vehicle speed pulse signal | |
| CN204988565U (en) | Capacitanc pressure transmitter | |
| CN201311449Y (en) | Signal conditioning circuit of high precision measurement uV level voltage | |
| CN217849385U (en) | High-temperature-resistant precise hybrid integrated amplification circuit | |
| Zhang et al. | Design of the new ultrasonic wind speed and direction sensor | |
| CN208547599U (en) | A kind of TDS detection circuit and water purifier | |
| CN204730976U (en) | Pressure transducer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130424 Effective date of abandoning: 20141001 |
|
| RGAV | Abandon patent right to avoid regrant |