CN103414458A - Activation circuit, diagnosis tool and initialization tool for universal tire pressure monitoring system sensor - Google Patents
Activation circuit, diagnosis tool and initialization tool for universal tire pressure monitoring system sensor Download PDFInfo
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- CN103414458A CN103414458A CN2013103373413A CN201310337341A CN103414458A CN 103414458 A CN103414458 A CN 103414458A CN 2013103373413 A CN2013103373413 A CN 2013103373413A CN 201310337341 A CN201310337341 A CN 201310337341A CN 103414458 A CN103414458 A CN 103414458A
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Abstract
The invention discloses an activation circuit, a diagnosis tool and an initialization tool for a universal tire pressure monitoring system sensor. The activation circuit comprises an LC resonance circuit, a first driving circuit, a second driving circuit, a resonance regulating unit and a system CPU. A transmitting antenna and a resonance capacitor are connected in series to form the LC resonance circuit, the first driving circuit is connected with one end of the LC resonance circuit, and the second driving circuit is connected with the other end of the LC resonance circuit. The resonance regulating unit is used for controlling the output voltage of the second driving circuit by controlling the output voltage of the first driving circuit and thereby regulating the target intensity of an activation signal transmitted by the LC resonance circuit. The system CPU is used for sending a control signal used for regulating the target intensity of the activation signal transmitted by the LC resonance circuit to the resonance regulating unit. After the activation circuit is arranged on the diagnosis tool for the universal tire pressure monitoring system sensor or the initialization tool for the universal tire pressure monitoring system sensor, excitation can be rapidly and accurately completed without repeatedly regulating the distance between the tools and the universal tire pressure monitoring system sensor.
Description
Technical field
The present invention relates to the tire pressure monitoring field, relate in particular to general tyre pressure monitoring system sensor active circuit, diagnosis and initialization instrument.
Background technology
Tire pressure monitoring system sensor diagnostic instrument and tire pressure monitoring system initialization instrument in use need to activate the tire pressure monitoring system transducer makes its emission high-frequency wireless signals (being generally 434MHz or 315MHz).The method that activates the tire pressure monitoring system transducer has multiple, the most frequently used method is to use diagnostic tool or initialization instrument near the tire pressure monitoring system transducer that is activated, to launch the low-frequency wireless signal (being generally 125KHz) with specific modulation information at present, and the tire pressure monitoring system transducer is launched the high-frequency wireless signals with information such as ID, air pressure, temperature after receiving this low-frequency wireless signal.The tire pressure monitoring system transducer has several producers and model at present, and the different tire pressure monitoring system sensor is not quite identical to the amplitude requirement of low frequency activation signal.And current tire pressure monitoring system sensor diagnostic instrument or tire pressure monitoring system initialization instrument do not design for the function of different manufacturers with the different amplitude low frequency of model tire pressure monitoring system sensor emission activation signal, when automobile maintains or keeps in repair, need to select according to different vehicles the instrument of different tire pressure monitoring system sensor activations.
Summary of the invention
The invention provides the distance of exempting repeatedly between adjustment means and tire pressure monitoring system transducer, quick and precisely complete the circuit, diagnostic tool and the initialization instrument that excite.
For realizing foregoing circuit, diagnostic tool and initialization instrument, the present invention by the following technical solutions:
On the one hand, adopt general tyre pressure monitoring system sensor active circuit, comprising:
The LC resonant circuit that transmitting antenna and resonance capacitances in series form, the first drive circuit be connected with an end of LC resonant circuit, the second drive circuit is connected with the other end of LC resonant circuit;
The resonance regulon, for by controlling the output voltage of the first drive circuit, control the output voltage of the second drive circuit, thereby regulate the target strength of the activation signal of LC resonant circuit emission;
System CPU, for sending and realize regulating the control signal that the LC resonant circuit is launched the target strength of activation signal to described resonance regulon.
Wherein, described resonance regulon comprises respectively the half-bridge that is electrically connected with the first drive circuit and the second drive circuit/full-bridge control circuit, the input of half-bridge/full-bridge control circuit is electrically connected with gate circuit, described system CPU enables or the selection of closed condition by the control gate circuit, with the selection of the drive pattern of controlling described half-bridge or full-bridge; During half-bridge driven, the two ends of controlling the LC resonant circuit by the first drive circuit and the second drive circuit are in a kind of in four kinds of connection status, and described four kinds of connection status are an end ground connection of LC resonant circuit or connect power supply, other end input voltage waveform; A perhaps end input voltage waveform of LC resonant circuit, other end ground connection or connect power supply; When full-bridge drives, the voltage of the single spin-echo of the second drive circuit output and the first drive circuit, the intensity of regulating the activation signal of LC resonant circuit emission by the drive pattern change of half-bridge and full-bridge.
Wherein, described resonance regulon comprises respectively the voltage commutation circuit be electrically connected with the first drive circuit, the second drive circuit, described voltage commutation circuit, be used for the intensity of control to the activation signal of the size adjustment LC resonant circuit emission of the voltage of the first drive circuit and the conveying of the second drive circuit, described system CPU is controlled the size of described voltage commutation circuit to the voltage of the first drive circuit and the conveying of the second drive circuit.
Wherein, also comprise selector switch and a plurality of control capacittances be used to the electric capacity of regulating the LC resonant circuit of controlling by selector switch, by the number of the selector switch adjustment control capacittance in parallel with resonant capacitance, finely tune with the size to electric capacity in the LC resonant circuit.
Wherein, described selector switch is toggle switch, rotary disk shutter or electronic switch.
Wherein, described the first driving and the second drive circuit are comprised of metal-oxide-semiconductor or triode.
Wherein, described the first drive circuit comprises P type metal-oxide-semiconductor M1 and N-type metal-oxide-semiconductor M2, and the drain electrode of described P type metal-oxide-semiconductor M1 and an end of LC resonant circuit are connected, and source electrode is connected with power supply, and grid connects control signal; The source ground of N-type metal-oxide-semiconductor M2, drain electrode is connected with an end of LC resonant circuit, and grid connects control signal; The second drive circuit comprises P type metal-oxide-semiconductor M3 and N-type metal-oxide-semiconductor M4, and the drain electrode of described P type metal-oxide-semiconductor M3 is connected with the other end of LC resonant circuit, and source electrode is connected with power supply, and grid connects control signal; The source ground of described N-type metal-oxide-semiconductor M4, drain electrode is connected with the other end of LC resonant circuit, and grid connects control signal.
Wherein, described the first drive circuit and the second drive circuit are IRF9952 type integrated circuit.
On the other hand, adopt general tyre pressure monitoring system sensor diagnostic tool, be provided with above-mentioned general tyre pressure monitoring system sensor active circuit.
On the other hand, be provided with above-mentioned general tyre pressure monitoring system sensor active circuit.
Beneficial effect of the present invention is: the tire pressure monitoring system transducer sends the low frequency activation signal by LC resonant circuit in active circuit and activates, the resonance regulon is set in the present invention in active circuit regulate the amplitude of low frequency activation signal, after tire pressure monitoring system sensor diagnostic instrument or tire pressure monitoring system initialization instrument arrange this active circuit, do not need repeatedly the distance between adjustment means and tire pressure monitoring system transducer, can quick and precisely complete and excite.
The accompanying drawing explanation
Fig. 1 is the first example structure block diagram of general tyre pressure monitoring system sensor active circuit of the present invention;
Fig. 2 a is the second example structure block diagram of general tyre pressure monitoring system sensor active circuit of the present invention;
Fig. 2 b is a kind of concrete circuit diagram of two drive circuits of general tyre pressure monitoring system sensor active circuit of the present invention.
Embodiment
Below in conjunction with accompanying drawing and by embodiment, further illustrate technical scheme of the present invention.
Fig. 1 is the first example structure block diagram of general tyre pressure monitoring system sensor active circuit of the present invention, as shown in the figure, this circuit comprises: the LC resonant circuit that transmitting antenna 110 and resonant capacitance 120 are composed in series, and the first drive circuit 130 be connected with an end of LC resonant circuit, the second drive circuit 140 is connected with the other end of LC resonant circuit;
Resonance regulon 150, for by controlling the output voltage of the first drive circuit 130, control the output voltage of the second drive circuit 140, thereby regulate the target strength of the activation signal of LC resonant circuit emission;
The tire pressure monitoring system transducer sends the low frequency activation signal by LC resonant circuit in active circuit and activates, the variable amplitude of existing active circuit medium and low frequency activation signal is very little, resonance regulon 150 is set in the present invention in active circuit regulate the amplitude of low frequency activation signal, after tire pressure monitoring system sensor diagnostic instrument or tire pressure monitoring system initialization instrument arrange this active circuit, do not need repeatedly the distance between adjustment means and tire pressure monitoring system transducer, can quick and precisely complete and excite.
Fig. 2 a is the second example structure schematic diagram of general tyre pressure monitoring system sensor active circuit of the present invention, as shown in the figure, described resonance regulon 150 comprises respectively the half-bridge that is electrically connected with the first drive circuit 130 and the second drive circuit 140/full-bridge control circuit 151, the input of half-bridge/full-bridge control circuit 151 is electrically connected with gate circuit 153, described system CPU 160 enables or the selection of closed condition by control gate circuit 153, with the selection of the drive pattern of controlling described half-bridge/full-bridge control circuit 151; During half-bridge driven, the two ends of controlling the LC resonant circuits by the first drive circuit 130 and the second drive circuit 140 are in a kind of in four kinds of connection status, and described four kinds of connection status are an end ground connection of LC resonant circuit or connect power supply, other end input voltage waveform; A perhaps end input voltage waveform of LC resonant circuit, other end ground connection or connect power supply; When full-bridge drove, the second drive circuit 140 outputs and first drove the voltage of the single spin-echo on electric 130 tunnels, by the drive pattern of half-bridge and full-bridge, changed the intensity of the activation signal of regulating the emission of LC resonant circuit.Described resonance regulon 150 comprises respectively the voltage commutation circuit 152 be electrically connected with the first drive circuit 130, the second drive circuit 140, described voltage commutation circuit 152, be used for the intensity of control to the activation signal of the size adjustment LC resonant circuit emission of the voltage of the first drive circuit 130 and the second drive circuit 140 conveyings, described system CPU 160 is controlled the size of described voltage commutation circuit 152 to the voltage of the first drive circuit 140 and the second drive circuit 140 conveyings.Also comprise selector switch 122 and a plurality of control capacittances 121 be used to the electric capacity of regulating the LC resonant circuit of controlling by selector switch 122, by selector switch 122, adjust the number of the control capacittance 121 in parallel with resonant capacitance 120, finely tune with the size to electric capacity in the LC resonant circuit.Described selector switch 121 is toggle switch, rotary disk shutter or electronic switch.Described the first driving and the second drive circuit are comprised of metal-oxide-semiconductor or triode.
The transmitting antenna 110 of low frequency activation signal, generally to use bar magnet, on circuit, be equivalent to inductance, transmitting antenna 110 is with after electric capacity 120 is connected, form the LC resonant circuit, make the alternating voltage of two sections of bar magnets reach 300V～800V, the low frequency activation signal is launched, the tire pressure monitoring system transducer is started working after by the low frequency activation signal, being activated.Two drive circuits in this programme, all by metal-oxide-semiconductor or transistor, formed, the energy of power supply 170 is fed on the LC resonant circuit, by half-bridge/full-bridge control circuit, the type of drive of the first drive circuit and the second drive circuit is controlled in the present embodiment.When adopting the half-bridge driven mode, have four kinds of connection status and can select switching, the first state is the end dead earth that the LC resonant circuit is connected with the second drive circuit, the first drive circuit is to other end output voltage waveforms, the second state is that the end that the LC resonant circuit is connected with the second drive circuit fixedly connects power supply, the first drive circuit is to other end output voltage waveforms, the third state is the end dead earth that the LC resonant circuit is connected with the first drive circuit, the second drive circuit is to other end output voltage waveforms, the 4th kind of state is that the end that the LC resonant circuit is connected with the first drive circuit fixedly connects power supply, the second drive circuit is to other end output voltage waveforms, when adopting 125K hertz low frequency activation signal, the switching frequency of the second drive circuit 140 between power supply 170 and ground is also the 125K hertz, under the half-bridge driven mode, the resonance potential at bar magnet two ends is lower, and the low frequency activation signal amplitude radiate is also just lower.When adopting the full-bridge type of drive, the second drive circuit 140 is identical with the switching frequency of the first drive circuit 130, between power supply 170 and ground, switch, but the driving single spin-echo of the driving phase place of the second drive circuit 140 and the first drive circuit 130, namely the second drive circuit 140 connects power supply 170 during the first drive circuit 130 ground connection, the second drive circuit 140 ground connection when the first drive circuit 130 connects power supply 170, when adopting the low frequency activation signal of 125K hertz, the first drive circuit 130 and the switching frequency of the second drive circuit 140 between power supply 170 and ground are the 125K hertz but single spin-echo.Under the full-bridge type of drive under the bar magnet two ends can obtain than half-bridge driven pattern higher resonance potential, the low frequency activation signal radiate is also just stronger, concrete half-bridge and the switching of full-bridge are controlled by system CPU 160.Half-bridge and full-bridge switching mode, make the excursion of resonance potential increase by one times.The LC resonant circuit is by two drive circuitry by power supply 170, after having increased the voltage handover module, system CPU 160 controls by the voltage handover module voltage that power supply 170 outputs to two driver modules according to actual needs, thereby change the voltage at bar magnet two ends in the LC resonant circuit, and then the amplitude of change low frequency activation signal, by the voltage handover module is set, resonance potential fine steps scope and precision have further been increased.Wherein the setting of control capacittance 121 is in order to reduce foozle.The bar magnet of transmitting antenna 110 and electric capacity 120 in process of production all can some foozles, so the low frequency signal of different tire pressure monitoring system sensor diagnostic instruments or tire pressure monitoring system initialization instrument emission amplitude all can some difference, so in the present invention, increased selector switch 122 and a plurality of control capacittance 121 for fine-tuned emission intensity.Each control capacittance 121 is passed through respectively a terminal of the selecting side at selection beginning and is connected with selector switch 122, quantity by the adjustment change of selector switch 122 control capacittance 121 in parallel with electric capacity 120, thereby change the value of C in the LC resonant circuit, the voltage at bar magnet two ends can change along with the change of the value of C.In inside plants, regulate the position of selector switch 122 by particular step and method, the voltage of the LC resonant circuit that is is desired value, thus the difference between the abatement apparatus individuality.When 212 of selector switch 122 and control capacittances were produced in factory, adjusting can be used, and generally can not change it after dispatching from the factory again.Can certainly select directly to replace electric capacity 120 and reach the purpose that changes capacitance.
Further, as shown in Figure 2 b, described the first drive circuit comprises P type metal-oxide-semiconductor M1 and N-type metal-oxide-semiconductor M2, and the drain electrode of described P type metal-oxide-semiconductor M1 and an end of LC resonant circuit are connected, and source electrode is connected with power supply, and grid connects control signal; The source ground of N-type metal-oxide-semiconductor M2, drain electrode is connected with an end of LC resonant circuit, and grid connects control signal; The second drive circuit comprises P type metal-oxide-semiconductor M3 and N-type metal-oxide-semiconductor M4, and the drain electrode of described P type metal-oxide-semiconductor M3 is connected with the other end of LC resonant circuit, and source electrode is connected with power supply, and grid connects control signal; The source ground of described N-type metal-oxide-semiconductor M4, drain electrode is connected with the other end of LC resonant circuit, and grid connects control signal.
The control signal received by the grid of controlling four metal-oxide-semiconductors, realize the amplitude of low frequency signal is controlled thereby realize controlling the voltage that two drive circuits apply to the two ends of LC resonant circuit.
Preferably, described the first drive circuit 130 and the second drive circuit 140 are IRF9952 type integrated circuit.
Further, above-mentioned general tyre pressure monitoring system sensor active circuit is arranged to tire pressure monitoring system sensor diagnostic instrument, newly obtains a kind of general tyre pressure monitoring system sensor diagnostic tool.
Further, above-mentioned general tyre pressure monitoring system sensor active circuit is arranged to tire pressure monitoring system sensor initializing instrument, newly obtains a kind of general tyre pressure monitoring system sensor initialization instrument.
The above; only be the present invention's embodiment preferably, but protection scope of the present invention is not limited to this, anyly is familiar with the people of this technology in the disclosed technical scope of the present invention; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (10)
1. general tyre pressure monitoring system sensor active circuit, is characterized in that, comprising:
The LC resonant circuit that transmitting antenna and resonance capacitances in series form, the first drive circuit be connected with an end of LC resonant circuit, the second drive circuit is connected with the other end of LC resonant circuit;
The resonance regulon, for by controlling the output voltage of the first drive circuit, control the output voltage of the second drive circuit, thereby regulate the target strength of the activation signal of LC resonant circuit emission;
System CPU, for sending and realize regulating the control signal that the LC resonant circuit is launched the target strength of activation signal to described resonance regulon.
2. general tyre pressure monitoring system sensor active circuit according to claim 1, it is characterized in that, described resonance regulon comprises respectively the half-bridge that is electrically connected with the first drive circuit and the second drive circuit/full-bridge control circuit, the input of half-bridge/full-bridge control circuit is electrically connected with gate circuit, described system CPU enables or the selection of closed condition by the control gate circuit, with the selection of the drive pattern of controlling described half-bridge or full-bridge; During half-bridge driven, the two ends of controlling the LC resonant circuit by the first drive circuit and the second drive circuit are in a kind of in four kinds of connection status, and described four kinds of connection status are an end ground connection of LC resonant circuit or connect power supply, other end input voltage waveform; A perhaps end input voltage waveform of LC resonant circuit, other end ground connection or connect power supply; When full-bridge drives, the voltage of the single spin-echo of the second drive circuit output and the first drive circuit, the intensity of regulating the activation signal of LC resonant circuit emission by the drive pattern change of half-bridge and full-bridge.
3. according to the described general tyre pressure monitoring system sensor of claim 1 to 2 any one active circuit, it is characterized in that, described resonance regulon comprises respectively the voltage commutation circuit be electrically connected with the first drive circuit, the second drive circuit, described voltage commutation circuit, be used for the intensity of control to the activation signal of the size adjustment LC resonant circuit emission of the voltage of the first drive circuit and the conveying of the second drive circuit, described system CPU is controlled the size of described voltage commutation circuit to the voltage of the first drive circuit and the conveying of the second drive circuit.
4. general tyre pressure monitoring system sensor active circuit according to claim 3, it is characterized in that, also comprise selector switch and a plurality of control capacittances be used to the electric capacity of regulating the LC resonant circuit of controlling by selector switch, by the number of the selector switch adjustment control capacittance in parallel with resonant capacitance, finely tune with the size to electric capacity in the LC resonant circuit.
5. general tyre pressure monitoring system sensor active circuit according to claim 4, is characterized in that, described selector switch is toggle switch, rotary disk shutter or electronic switch.
6. general tyre pressure monitoring system sensor active circuit according to claim 1, is characterized in that, described the first driving and the second drive circuit are comprised of metal-oxide-semiconductor or triode.
7. general tyre pressure monitoring system sensor active circuit according to claim 6, it is characterized in that, described the first drive circuit comprises P type metal-oxide-semiconductor M1 and N-type metal-oxide-semiconductor M2, the drain electrode of described P type metal-oxide-semiconductor M1 and an end of LC resonant circuit are connected, source electrode is connected with power supply, and grid connects control signal; The source ground of N-type metal-oxide-semiconductor M2, drain electrode is connected with an end of LC resonant circuit, and grid connects control signal; The second drive circuit comprises P type metal-oxide-semiconductor M3 and N-type metal-oxide-semiconductor M4, and the drain electrode of described P type metal-oxide-semiconductor M3 is connected with the other end of LC resonant circuit, and source electrode is connected with power supply, and grid connects control signal; The source ground of described N-type metal-oxide-semiconductor M4, drain electrode is connected with the other end of LC resonant circuit, and grid connects control signal.
8. general tyre pressure monitoring system sensor active circuit according to claim 1, is characterized in that, described the first drive circuit and the second drive circuit are IRF9952 type integrated circuit.
9. general tyre pressure monitoring system sensor diagnostic tool, is characterized in that, is provided with the described general tyre pressure monitoring system sensor of claim 1-8 any one active circuit.
10. general tyre pressure monitoring system sensor initialization instrument, is characterized in that, is provided with the described general tyre pressure monitoring system sensor of claim 1-8 any one active circuit.
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| CN201310337341.3A CN103414458B (en) | 2013-08-05 | 2013-08-05 | General tyre pressure monitoring system sensor active circuit, diagnose and initialization instrument |
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| CN201310337341.3A CN103414458B (en) | 2013-08-05 | 2013-08-05 | General tyre pressure monitoring system sensor active circuit, diagnose and initialization instrument |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109795269A (en) * | 2019-03-13 | 2019-05-24 | 深圳市元征科技股份有限公司 | A kind of low frequency signal adjusting method and device |
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