CN213780195U - Gear detection circuit, accurate gear judgment circuit applying same and gas stove - Google Patents
Gear detection circuit, accurate gear judgment circuit applying same and gas stove Download PDFInfo
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- CN213780195U CN213780195U CN202022310741.3U CN202022310741U CN213780195U CN 213780195 U CN213780195 U CN 213780195U CN 202022310741 U CN202022310741 U CN 202022310741U CN 213780195 U CN213780195 U CN 213780195U
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Abstract
The utility model discloses a circuit and gas-cooker are judged to accurate gear of gear detection circuitry and applied it, wherein, gear detection circuitry includes mechanical switch module and resistance network module, mechanical switch module electricity connection resistance network module, mechanical switch module is used for the contact and the disconnection of gear, resistance network module is used for carrying out the gear according to the contact of mechanical switch module gear and the gear voltage that disconnection output corresponds and detects. The utility model discloses a gear detection circuitry, at first realize the contact and the disconnection of gear through the mechanical switch module, then carry out the gear through resistance network module according to the contact of mechanical switch module gear and the gear voltage that disconnection output corresponds and detect, thereby abandon mechanical type slide rheostat's control mode, eliminate the uncertainty of knob gear slip in-process voltage, reduce the gear and jump shelves, unsettled class abnormal problem, realize low cost, accurate height, advantages such as high efficiency, promote gear detection circuitry reliability such as gas-cooker.
Description
Technical Field
The utility model belongs to the technical field of the gas-cooker, concretely relates to gear detection circuitry and use its accurate gear to judge circuit and gas-cooker.
Background
In the market, gear detection of gas stoves and the like generally adopts a mechanical slide rheostat and the like to judge gear voltage.
However, the existing mechanical sliding rheostat has the disadvantages of high hardware cost, large voltage fluctuation in the sliding process, complex structure and the like, and meanwhile, in the knob gear sliding process controlled by the mechanical sliding rheostat, due to reasons of mechanical friction, contact oxidation, position deviation and the like, abnormal problems such as voltage uncertainty, gear jumping, suspension and the like are easily caused.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a gear detection circuitry abandons mechanical type slide rheostat's control mode, realizes advantages such as low cost, accurate height, high efficiency, promotes gear detection circuitry reliability such as gas-cooker.
Another object of the utility model is to provide a circuit is judged to accurate gear.
Another object of the utility model is to provide a gas stove.
The utility model adopts the technical proposal that:
the utility model provides a gear detection circuit, includes mechanical switch module and resistance network module, mechanical switch module electricity connection resistance network module, mechanical switch module is used for the contact and the disconnection of gear, resistance network module is used for carrying out the gear according to the contact of mechanical switch module gear and the gear voltage that the disconnection output corresponds and detects.
Preferably, the resistor network module includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, and an operational amplifier L1, the reference voltage UREF is connected in parallel with one end of the first resistor R1 and one end of the second resistor R2, the other end of the second resistor R2 is connected in parallel with one end of the third resistor R3 and one end of the fourth resistor R4, the other end of the fourth resistor R4 is connected to a fifth pin of the operational amplifier L1, a sixth pin of the operational amplifier L1 is connected in series with the sixth resistor R6 and then connected to a seventh pin of the operational amplifier L1 to form the output voltage Vout, and a fifth pin of the operational amplifier L1 is connected in series with the fifth resistor R5 and then connected to ground.
Preferably, the mechanical switch module includes a first switch S1 and a second switch S2, a third pin of the first switch S1 is connected to a third pin of the second switch S2, a second pin of the first switch S1 is connected to the other end of the first resistor R1, a second pin of the second switch S2 is connected to the other end of the third resistor R3, and both the first pin of the first switch S1 and the first pin of the second switch S are connected to a fifth pin of the operational amplifier L1.
Preferably, the resistance value of the fourth resistor R4 is equal to the resistance value of the third resistor R3, the resistance value of the third resistor R3 is equal to the resistance value of the first resistor R1, and the resistance value of the first resistor R1 is equal to twice the resistance value of the second resistor R2.
Preferably, the first switch S1 and the second switch S2 are both single-pole double-throw switches.
The utility model discloses a another technical scheme is realized like this:
the utility model provides an accurate gear judges circuit, its includes gear detection circuit and hysteresis comparator module, gear detection circuit is connected to hysteresis comparator module electricity, hysteresis comparator module is used for judging the gear according to the gear voltage of gear detection circuit output accurately.
Preferably, the hysteresis comparator module comprises a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a third switch S3, a fourth switch S4 and a hysteresis comparator L2, the sixth pin of the hysteresis comparator L2 is connected to the resistor network module after being connected in series with the seventh resistor R7, the fifth pin of the hysteresis comparator L2 is connected in parallel with one end of the eighth resistor R8, one end of the ninth resistor R9, one end of the tenth resistor R10 and one end of the eleventh resistor R11, the other end of the eighth resistor R8 is connected in series with the third switch S3, the other end of the ninth resistor R9 is connected in series with the fourth switch S4, and the other end of the tenth resistor R10 are both connected to the adjustable voltage VR, and the other end of the eleventh resistor R11 and the seventh pin of the hysteresis comparator L2 are connected to form a voltage U0.
Preferably, the third switch S3 and the fourth switch S4 are both single pole, single throw switches.
The utility model discloses a another technical scheme is realized like this:
a gas stove comprises the gear detection circuit or the accurate gear judgment circuit.
Compared with the prior art, the utility model discloses a gear detection circuitry, at first realize the contact and the disconnection of gear through mechanical switch module, then carry out the gear through resistance network module according to the contact of mechanical switch module gear and the gear voltage that disconnection output corresponds and detect, thereby abandon mechanical type slide rheostat's control mode, eliminate knob gear slip in-process because mechanical friction, contact oxidation, the voltage uncertainty that reasons such as position deviation caused, reduce the gear and jump the shelves, unusual problems such as unsettled, realize low cost, it is accurate high, advantages such as high efficiency, promote gear detection circuitry reliability such as gas-cooker.
Drawings
Fig. 1 is a circuit diagram of a gear detection circuit provided in embodiment 1 of the present invention;
fig. 2 is a circuit diagram of an accurate gear determination circuit provided in embodiment 2 of the present invention;
fig. 3 is a hysteresis comparison area diagram of the accurate gear determination circuit provided by embodiment 2 of the present invention, in which the output voltage Vout follows the gear change.
Description of the reference numerals
1-mechanical switch module, 2-resistance network module and 3-hysteresis comparator module.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
The embodiment of the utility model provides a gear detection circuit, as shown in fig. 1, including mechanical switch module 1 and resistance network module 2, 1 electric connection resistance network module 2 of mechanical switch module, mechanical switch module 1 is used for the contact and the disconnection of gear, resistance network module 2 is used for carrying out the gear according to the contact of 1 gear of mechanical switch module and the gear voltage that the disconnection output corresponds and detects.
Like this, at first realize the contact and the disconnection of gear through mechanical switch module 1, then carry out the gear through resistance network module 2 according to the gear voltage that the contact of mechanical switch module gear 1 and disconnection output correspond, thereby abandon mechanical type slide rheostat's control mode, eliminate the voltage uncertainty that knob gear slip in-process caused because reasons such as mechanical friction, contact oxidation, position deviation, reduce gear jump shelves, unsettled abnormal problems such as, realize low cost, accurate advantage such as high, high efficiency, promote gear detection circuit reliability such as gas-cooker.
The mechanical switch module 1 comprises a first switch S1 and a second switch S2, a third pin of the first switch S1 is connected with a third pin of the second switch S2, a second pin of the first switch S1 is connected with the other end of the first resistor R1, a second pin of the second switch S2 is connected with the other end of the third resistor R3, and the first pin of the first switch S1 and the first pin of the second switch S are both connected with a fifth pin of the operational amplifier L1. Wherein the first switch S1 and the second switch S2 are both single-pole double-throw switches.
Thus, the first switch S1 and the second switch S2 are 1-2 contact switches of the stove knob;
s1, the contact and disconnection of the gears are realized through the mechanical switch module, and the specific steps are as follows:
s11, when the knob is in the 0-gear, the first switch S1 and the second switch S2 are both in the initial state and are both contacted with the third pin;
s12, such as when the knob is rotated from 0-gear to 1-gear; the first switch S1 is contacted with the first pin by the third pin, and the contact switch state of the second switch S2 is still unchanged;
s13, when the knob is turned to the 2-gear, the second switch S2 contacts the first pin through the third pin, and the 1-gear keeps the S12 state;
s14, if the knob is returned to 1 st gear from 2 nd gear, the second switch S2 contacts the third pin from the first pin, at this time, 1 st gear keeps the state of S12 unchanged;
s15, if the knob is returned to 0 gear from 1 gear, the first switch S1 contacts the third pin from the first pin, at this time, 2 gear keeps the state of S14 unchanged;
the steps of S11-S15 are circulated in the way for 5 steps to realize the gear switching of the knob switch of the cooking range.
The resistor network module 2 includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6 and an operational amplifier L1, a reference voltage UREF is connected in parallel with one end of the first resistor R1 and one end of the second resistor R2, the other end of the second resistor R2 is connected in parallel with one end of the third resistor R3 and one end of the fourth resistor R4, the other end of the fourth resistor R4 is connected with a fifth pin of an operational amplifier L1, a sixth pin of the operational amplifier L1 is connected in series with the sixth resistor R6 and then connected with a seventh pin of the operational amplifier L1 to form an output voltage Vout, and a fifth pin of the operational amplifier L1 is connected in series with the fifth resistor R5 and then grounded. The resistance value of the fourth resistor R4 is equal to the resistance value of the third resistor R3, the resistance value of the third resistor R3 is equal to the resistance value of the first resistor R1, and the resistance value of the first resistor R1 is equal to twice the resistance value of the second resistor R2.
In this way, at S2, the shift voltage is divided and outputted by the resistor network module 2, and the constant-state operating voltage and the positive voltage range output Vout of the operational amplifier L1 are provided by the fifth resistor R5 (bias resistor).
According to the principle of virtual short and virtual break,
VN _ IC1B ═ VP _ IC1B ═ UREF × R5/(((R4// R3) + R2)// R1)), currents flowing through R4 and R3, and R1 and R2 are equal regardless of the contact states of the first switch S1 and the second switch S2; and R4-R3-R2-R1, the current distributed by the resistor network is:
IR1＝IR2＝2*IR4＝2*IR3＝UREF/R。
the method comprises the following specific steps:
s21, referring to S11, when the knob is in the 0-position, since the first switch S1 and the second switch S2 both contact the third pin, the voltage at the non-inverting input terminal (the fifth pin) of the operational amplifier L1 is VP _ IC1B ═ UREF × R5/((R4// R3) + R2)// R1)); according to the virtual interrupt principle, the voltage at the inverting input terminal (sixth pin) of the operational amplifier L1 is VN _ IC1B ═ VP _ IC1B at this time; according to the virtual short principle, no current passes through the sixth resistor R6 (degeneration resistor), so the output voltage of the operational amplifier L1 is: vout _ IC1B VP _ IC 1B;
when the knob is in the 1-position, the first switch S1 contacts the first pin and the second switch S2 contacts the third pin when S22 and reference S12 indicate that the current of the sixth resistor R6 (negative feedback resistor) is I _ Rf ═ I _ VP _ IC 1B/R1 ═ I _ R1, so the operational amplifier output voltage is:
Vout＝VN_IC1B-I_Rf*Rf＝VN_IC1B-I_R1*R1；
s23, refer to S13 when the knob is in 2-gear; since the first switch S1 and the second switch S2 are both in contact with the first pin, and the current of the sixth resistor R6 (negative feedback resistor) is I _ Rf 2 × I _ R1, the operational amplifier output voltage Vout is VN _ IC1B-I _ Rf VN _ IC1B-2 × I _ R1R 1;
s24, repeating the steps S21-S23 again to realize the output of the range knob gear voltage:
0 range- - -UREF;
gear 1-Vout _ VN _ IC1B-I _ Rf _ VN _ IC1B-I _ R1R 1;
gear 2-Vout _ VN _ IC1B-I _ Rf _ VN _ IC 1B-2I _ R1R 1;
the voltage of the kitchen range knob gear is changed among UREF-VN _ IC 1B-2I _ R1 by integrating the steps, so that the gear change is identified.
The utility model discloses a gear detection circuitry, at first realize the contact and the disconnection of gear through the mechanical switch module, then carry out the gear through resistance network module according to the contact of mechanical switch module gear and the gear voltage that disconnection output corresponds and detect, thereby abandon mechanical type slide rheostat's control mode, eliminate knob gear slip in-process because mechanical friction, contact oxidation, the voltage uncertainty that reasons such as positional deviation caused, reduce the gear and jump the shelves, unusual problems such as unsettled, realize low cost, it is accurate high, advantages such as high efficiency, promote gear detection circuitry reliability such as gas-cooker.
Example 2
As shown in fig. 2, embodiment 2 provides a circuit is judged to accurate gear, it includes gear detection circuit and hysteresis comparator module 3, gear detection circuit is connected to hysteresis comparator module 3 electricity, hysteresis comparator module 3 is used for judging the gear according to the gear voltage of gear detection circuit output is accurate.
Like this, judge the gear through hysteresis comparator module 3 according to the gear voltage of gear detection circuit output accurately, and then improve the gear and judge the precision.
The hysteresis comparator module 3 comprises a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a third switch S3, a fourth switch S4 and a hysteresis comparator L2, a sixth pin of the hysteresis comparator L2 is connected with the resistor network module 2 after being connected with the seventh resistor R7 in series, a fifth pin of the hysteresis comparator L2 is connected with one end of an eighth resistor R8, one end of a ninth resistor R9, one end of a tenth resistor R10 and one end of an eleventh resistor R11 in parallel, the other end of the eighth resistor R8 is connected with the third switch S3 in series, the other end of the ninth resistor R9 is connected with the fourth switch S4 in series, and the other end of the tenth resistor R10 are both connected with the adjustable voltage VR, the other end of the eleventh resistor R11 and the seventh pin of the hysteresis comparator L2 are connected with the hysteresis voltage U6, and the comparator L0 is connected with the power supply voltage VCC 2, the ground pin of the hysteresis comparator L2 is grounded, wherein the third switch S3 and the fourth switch S4 are both single-pole single-throw switches.
Thus, in S3, the hysteresis comparator module 3 is used to implement the conversion from the shift position DA and output the exclusive judgment area level, as shown in fig. 3, the method specifically includes the following steps:
s31, according to S11, when the knob is in the 0-position, the first switch S1 and the second switch S2 are both in the initial state of contacting the third pin, and the third switch S3 and the fourth switch S4 are turned off, and according to S24, when the shift position is in the 0-position, and the UREF > (VCC-VR) × R11/(R10+ R11), the U0 is 0, and the shift position is determined to be in the 0-position;
s32, according to S12, when the knob is in 1 gear, the first switch S1 is contacted with the first pin by the third pin, at this time, the 2 gear contact switch state is still unchanged, meanwhile, the third switch S3 is closed, the fourth switch S4 is opened, according to S24, when the gear is in 1 gear,
when Vout > (VCC-VR) × R11/((R10// R8) + R11), U0 is 0, and it is determined as 1 st;
s33, according to S13, for example, when the knob is in the 2-gear, the second switch S2 is contacted to the first pin by the third pin, and then the 1-gear keeps the state of S12 unchanged, while the third switch S3 and the fourth switch S4 are closed, according to S24, when the gear is in the 2-gear, Vout > (VCC-VR) × R11/((R10// R8// R9) + R11), U0 is 0, and it is determined as the 2-gear;
s34, obtaining a hysteresis comparison area that Vout appears 3 mutual exclusions following the gear change according to S31-S33, and judging the switch position as 0, 1 and 2 gears.
The utility model discloses an accurate gear judges circuit, at first realize the contact and the disconnection of gear through the mechanical switch module, then carry out the gear through resistance network module according to the contact of mechanical switch module gear and the gear voltage that disconnection output corresponds and detect, thereby abandon mechanical type slide rheostat's control mode, eliminate knob gear slip in-process because mechanical friction, contact oxidation, the voltage uncertainty that reasons such as positional deviation caused, reduce the gear and jump the shelves, unusual problems such as unsettled, realize low cost, it is accurate high, advantages such as high efficiency, gear detection circuitry reliability such as promotion gas-cooker, realize gear judgement of higher precision, simultaneously because accurate gear judges that circuit directly changes through the level height and carries out concrete gear judgement, so the gear detection precision is higher.
Example 3
The embodiment 3 of the utility model provides a gas stove, it includes gear detection circuit perhaps accurate gear judge the circuit.
The utility model discloses a gas-cooker, at first realize the contact and the disconnection of gear through the mechanical switch module, then carry out the gear through resistance network module according to the contact of mechanical switch module gear and the gear voltage that disconnection output corresponds and detect, thereby abandon mechanical type slide rheostat's control mode, eliminate knob gear slip in-process because mechanical friction, contact oxidation, the voltage uncertainty that reasons such as positional deviation caused, reduce the gear and jump the shelves, unusual problems such as unsettled, realize low cost, it is accurate high, advantages such as high efficiency, promote gear detection circuitry reliability such as gas-cooker.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. The utility model provides a gear detection circuit, its characterized in that includes mechanical switch module (1) and resistance network module (2), mechanical switch module (1) electric connection resistance network module (2), mechanical switch module (1) is used for the contact and the disconnection of gear, resistance network module (2) are used for carrying out the gear according to the contact of mechanical switch module (1) gear and the gear voltage that the disconnection output corresponds and detect.
2. The gear detection circuit according to claim 1, wherein the resistor network module (2) comprises a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6 and an operational amplifier L1, a reference voltage UREF is connected in parallel with one end of the first resistor R1 and one end of the second resistor R2, the other end of the second resistor R2 is connected in parallel with one end of the third resistor R3 and one end of the fourth resistor R4, the other end of the fourth resistor R4 is connected with a fifth pin of an operational amplifier L1, a sixth pin of the operational amplifier L1 is connected in series with the sixth resistor R6 and then connected with a seventh pin of the operational amplifier L1 to form an output voltage Vout, and a fifth pin of the operational amplifier L1 is connected in series with the fifth resistor R5 and then grounded.
3. The gear detection circuit according to claim 2, characterized in that the mechanical switch module (1) comprises a first switch S1 and a second switch S2, a third pin of the first switch S1 is connected to a third pin of the second switch S2, a second pin of the first switch S1 is connected to the other end of the first resistor R1, a second pin of the second switch S2 is connected to the other end of the third resistor R3, and a first pin of the first switch S1 and a first pin of the second switch S are both connected to a fifth pin of an operational amplifier L1.
4. The shift detection circuit according to claim 2 or 3, wherein the fourth resistor R4 has a resistance equal to that of the third resistor R3, the third resistor R3 has a resistance equal to that of the first resistor R1, and the first resistor R1 has a resistance equal to twice that of the second resistor R2.
5. The range detection circuit of claim 3, wherein the first switch S1 and the second switch S2 are each single-pole double-throw switches.
6. A precise gear judgment circuit is characterized by comprising the gear detection circuit and a hysteresis comparator module (3) according to any one of claims 1 to 5, wherein the hysteresis comparator module (3) is electrically connected with the gear detection circuit, and the hysteresis comparator module (3) is used for precisely judging a gear according to the gear voltage output by the gear detection circuit.
7. The precise gear determination circuit according to claim 6, wherein the hysteresis comparator module (3) comprises a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a third switch S3, a fourth switch S4 and a hysteresis comparator L2, the sixth pin of the hysteresis comparator L2 is connected with the seventh resistor R7 in series and then is connected with the resistor network module (2), the fifth pin of the hysteresis comparator L2 is connected in parallel with one end of an eighth resistor R8, one end of a ninth resistor R9, one end of a tenth resistor R10 and one end of an eleventh resistor R11, the other end of the eighth resistor R8 is connected with the third switch S3 in series, the other end of the ninth resistor R9 is connected with the fourth switch S4 in series, and the other end of the tenth resistor R10 is connected with the adjustable voltage VR, the other end of the eleventh resistor R11 is connected to the seventh pin of the hysteresis comparator L2 to form a voltage U0.
8. The precise gear determination circuit of claim 7, wherein the third switch S3 and the fourth switch S4 are both single-pole single-throw switches.
9. A gas range, characterized in that it comprises the gear detection circuit of any one of claims 1-5 or the precise gear judgment circuit of any one of claims 6-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022310741.3U CN213780195U (en) | 2020-10-16 | 2020-10-16 | Gear detection circuit, accurate gear judgment circuit applying same and gas stove |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022310741.3U CN213780195U (en) | 2020-10-16 | 2020-10-16 | Gear detection circuit, accurate gear judgment circuit applying same and gas stove |
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| Publication Number | Publication Date |
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| CN213780195U true CN213780195U (en) | 2021-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022310741.3U Active CN213780195U (en) | 2020-10-16 | 2020-10-16 | Gear detection circuit, accurate gear judgment circuit applying same and gas stove |
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| CN (1) | CN213780195U (en) |
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