Wireless monitoring device

Abstract

The utility model discloses a wireless monitoring device which comprises a plurality of wireless monitors with different frequency modulation frequencies, and each wireless monitor comprises an acquisition module, a signal conditioning module, a frequency modulation wireless sending module, a main control module and a power supply module. The acquisition module is used for acquiring vibration and / or sound to obtain a first signal; the signal conditioning module is connected with the acquisition module and is used for carrying out filtering conditioning and power amplification on the first signal to obtain a second signal; the frequency modulation wireless sending module is connected with the signal conditioning module and is used for wirelessly sending the second signal in a frequency modulation mode; the main control module is connected with the frequency modulation wireless sending module and used for controlling the frequency modulation frequency; and the power supply module is used for providing electric energy for equipment on the wireless monitor. According to the utility model, the vibration and / or sound at different positions of the chassis of the vehicle are / is acquired through the plurality of wireless monitors with different frequency modulation frequencies, and are / is provided for a user in a wireless frequency modulation manner, so that the user can conveniently judge the condition of vehicle parts during the running of the vehicle.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of automobile detection, concretely relates to a wireless monitoring device. BACKGROUND

[0002] The chassis abnormal sound in the process of automobile driving is the problem that many car owners will encounter, and the chassis abnormal sound can indicate that the automobile may have a fault. However, the car owner can only feel the abnormal sound in the process of automobile driving, but it is difficult to accurately locate the position of the abnormal sound, which will bring inconvenience to the repair of the vehicle.

[0003] Therefore, a new device needs to be provided to solve the above problems. CONTENT OF THE UTILITY MODEL

[0004] In order to solve the problems existing in the prior art, the utility model provides a wireless monitoring device, which collects the vibration and / or sound at different positions of the vehicle chassis through a plurality of wireless monitors with different frequency modulation frequencies, and provides the user with the wireless frequency modulation mode, so as to facilitate the user to judge the vehicle part condition in the process of vehicle driving.

[0005] The utility model adopts the technical scheme of:

[0006] A wireless monitoring device comprises a plurality of wireless monitors with different frequency modulation frequencies, each wireless monitor comprises an acquisition module, a signal conditioning module, a frequency modulation wireless sending module, a main control module and a power module; the acquisition module is used for acquiring vibration and / or sound to obtain a first signal; the signal conditioning module is connected with the acquisition module and is used for filtering and conditioning the first signal and power amplification to obtain a second signal; the frequency modulation wireless sending module is connected with the signal conditioning module and is used for wirelessly sending the second signal through frequency modulation; the main control module is connected with the frequency modulation wireless sending module and is used for controlling the frequency modulation frequency; and the power module is used for providing power for the devices on the wireless monitor.

[0007] Further, the acquisition module comprises a piezoelectric ceramic vibration sensor, and the first signal is obtained through the piezoelectric ceramic vibration sensor.

[0008] Further, the signal conditioning module comprises a filter amplification unit and an audio power amplification unit; the filter amplification unit is used for filtering and amplifying the first signal collected by the acquisition module; the audio power amplification unit is connected with the main control module and the filter amplification unit, and the audio power amplification unit is used for receiving the start signal of the main control module and the output signal of the filter amplification unit; when the start signal of the main control module is received, the output signal of the filter amplification unit is power amplified to obtain a second signal in the form of a double-channel audio signal.

[0009] Further, the wireless listener further comprises a communication module connected to the main control module, for receiving setting information of the frequency modulation frequency.

[0010] Further, the communication module comprises a USB interface and a USB / serial port conversion chip.

[0011] Further, the wireless listener further comprises a communication module connected to the main control module, for receiving setting information of the frequency modulation frequency.

[0012] Further, the wireless listener further comprises a communication module connected to the main control module, for receiving setting information of the frequency modulation frequency.

[0013] Further, the wireless listener further comprises a communication module connected to the main control module, for receiving setting information of the frequency modulation frequency.

[0014] Further, the wireless listener further comprises a communication module connected to the main control module, for receiving setting information of the frequency modulation frequency.

[0015] Further, the wireless listener further comprises a communication module connected to the main control module, for receiving setting information of the frequency modulation frequency.

[0016] The wireless listener has the advantages that:

[0017] The wireless listener has the advantages that: BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a communication schematic diagram of the wireless listener and the frequency modulation radio of the utility model;

[0019] Figure 2The utility model is wireless monitor electrical principle diagram;

[0020] Figure 3 The utility model is signal conditioning module circuit principle drawing;

[0021] Figure 4 The utility model is frequency modulation wireless sending module circuit principle drawing;

[0022] Figure 5 The utility model is communication module circuit principle drawing;

[0023] Figure 6 The utility model is wireless monitor another electrical principle diagram;

[0024] Figure 7 The utility model is wireless monitor front structure schematic view;

[0025] Figure 8 The utility model is wireless monitor back structure schematic view;

[0026] Figure 9 The utility model is wireless monitor part structure exploded schematic view;

[0027] Figure 10 The utility model is wireless monitor part structure exploded schematic view;

[0028] Figure 11 The utility model is collection module section structure schematic view;

[0029] Figure 12 The utility model is power module circuit principle drawing.

[0030] In the drawing,

[0031] 100-wireless monitor, 110-collection module, 111-cap-shaped casing, 1111-through hole, 112-metal plate, 113-piezoelectric ceramic, 120-signal conditioning module, 121-filtering and amplifying unit, 122-audio power amplifying unit, 130-frequency modulation wireless sending module, 140-main control module, 150-power module, 151-voltage conversion module, 160-communication module, 170-upper casing, 171-mounting hole, 180-lower casing, 181-key mounting hole, 182-light transmission hole, 183-battery compartment, 184-battery compartment cover, 185-stand, 186-mounting column, 187-gap, 188-antenna containing portion, 190-circuit board, 191-sensor mounting frame, 192-indicating lamp, 193-key switch, 194-key, 200-frequency modulation radio. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of the present application.

[0033] The terms "first", "second", "third" in the present application are only for descriptive purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number or sequence of the indicated technical features. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative position relationship or movement between components in a certain posture (as shown in the drawings); it should be noted that when a component is referred to as "fixed to", "arranged on", or "connected to" another component, it can be directly on the other component or there can be a middle component. When a component is considered as "connected" to another component, it can be directly connected to the other component, or there can be one or more middle components between them. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for illustrative purposes, and do not represent the only implementation.

[0034] As shown in Figure 1 and Figure 2 To solve the problems existing in the prior art, the utility model provides a wireless monitoring device embodiment, including a plurality of wireless monitoring device 100 of different frequency modulation frequency, each wireless monitoring device includes acquisition module 110, signal conditioning module 120, frequency modulation wireless sending module 130, main control module 140 and power module 150. Acquisition module 110 is used to collect vibration and / or sound, obtains first signal;Signal conditioning module 120 is connected to the acquisition module, is used to filter conditioning and power amplification to first signal, obtains second signal;Frequency modulation wireless sending module 130 is connected to signal conditioning module 120, is used to send second signal by frequency modulation wireless;Main control module 140 is connected to frequency modulation wireless sending module 130, is used to control frequency modulation frequency;Power module 150 is used to provide electric energy for the equipment on wireless monitoring device 100.

[0035] The working principle of the utility model is that a plurality of wireless monitoring devices 100 with different frequency modulation frequencies can be arranged at different positions of the vehicle chassis, and the vibration and / or sound at different positions of the vehicle chassis can be collected by the wireless monitoring device 100. During driving, the user can select different frequency modulation frequencies through the frequency modulation radio 200 to listen to the vibration and / or sound collected by the wireless monitoring device 100 at different positions of the vehicle chassis, and then determine the condition of the vehicle components.

[0036] In some embodiments, the acquisition module 110 comprises a piezoelectric ceramic vibration sensor, and the first signal is obtained through the piezoelectric ceramic vibration sensor.

[0037] In some embodiments, referring to Figure 3 , the signal conditioning module 120 comprises a filter amplification unit 121 and an audio power amplification unit 122; the filter amplification unit 121 is used to filter and amplify the first signal collected by the acquisition module 110; the audio power amplification unit 122 is connected to the filter amplification unit 121 and the main control module 140, and the audio power amplification unit 122 is used to receive the enabling signal of the main control module 140 and the output signal of the filter amplification unit 121, and when the enabling signal of the main control module 140 is received, the output signal of the filter amplification unit 121 is power amplified to obtain a second signal in the form of a double-channel audio signal.

[0038] In a specific embodiment, referring to Figure 3The filter amplification unit 121 comprises an operational amplifier U3A, a resistor R8, a resistor R9, a resistor R13, a resistor R14, a resistor R15, a resistor R16, a resistor R17, a capacitor C3, a capacitor C8, a capacitor C9 and a capacitor C10. The first signal obtained by the acquisition module 110 is connected to the S+ terminal. The S+ terminal is connected to the positive input terminal of the operational amplifier U3A through the series connection of the resistor R14 and the resistor R15. The S+ terminal is connected to the negative input terminal of the operational amplifier U3A through the series connection of the resistor R13 and the capacitor C9. The S+ terminal is grounded through the resistor R16. The positive input terminal of the operational amplifier U3A is grounded through the parallel connection of the resistor R17 and the capacitor C10. The negative input terminal of the operational amplifier U3A is connected to the output terminal of the operational amplifier U3A through the series connection of the resistor R8 and the resistor R9. The two ends of the resistor R9 are connected in parallel to the C3. The output terminal of the operational amplifier U3A is connected to the S_IN terminal through the capacitor C8. The S_IN terminal is used as the output terminal of the filter amplification unit 121 and the input terminal of the audio power amplification unit 122. The audio power amplification unit 122 comprises an audio power amplification chip U2, a resistor R1, a resistor R7, a resistor R10, a resistor R12, a capacitor C4 and a capacitor C7. The S_IN terminal is connected to the first input pin VIN1 of the audio power amplification chip U2 through the series connection of the capacitor C4 and the resistor R7. The first input pin VIN1 of the audio power amplification chip U2 is connected to the first output pin VOUT1 of the audio power amplification chip U2 through the resistor R1. The first output pin VOUT1 of the audio power amplification chip U2 is used as the right channel output terminal AR. The S_IN terminal is connected to the second input pin VIN2 of the audio power amplification chip U2 through the series connection of the capacitor C7 and the resistor R12. The second input pin VIN2 of the audio power amplification chip U2 is connected to the second output pin VOUT2 of the audio power amplification chip U2 through the resistor R10. The second output pin VOUT2 of the audio power amplification chip U2 is used as the left channel output terminal AL. The bypass pin Bypass of the audio power amplification chip U2 is grounded through the capacitor C6. The shutdown pin SHUTDOWN# of the audio power amplification chip U2 is connected to the audio power amplification shutdown control terminal SHUTDOWN of the master control module 140. The master control module 140 can control the enablement and disablement of the audio power amplification chip U2. The model of the audio power amplification chip U2 can be LPA4809. The second signal in the form of a dual-channel audio signal can be obtained from the right channel output terminal AR and the left channel output terminal AL.

[0039] In a specific embodiment, referring to Figure 4The frequency modulation wireless transmitting module 130 comprises a frequency modulation wireless transmitting chip U1, a crystal oscillator Y1, a switching tube Q5, a resistor R2, a resistor R11, a resistor R26, a capacitor C1, a capacitor C2, a capacitor C5, a capacitor C21, an inductor L1 and an inductor L3. The left channel output end AR is connected to the left channel input pin ALI of the frequency modulation wireless transmitting chip U1 through the capacitor C1. The right channel output end AR is connected to the right channel input pin ARI of the frequency modulation wireless transmitting chip U1 through the capacitor C2. The output end TXAL1 of the crystal oscillator Y1 is connected to the first crystal oscillator pin TXAL1 of the frequency modulation wireless transmitting chip U1. The IO voltage pin VIO of the frequency modulation wireless transmitting chip U1 is connected to a 3.3V power supply. The serial data pin SDA of the frequency modulation wireless transmitting chip U1 is connected to the serial data end SDA of the main control module 140 and further connected to the 3.3V power supply through the resistor R2. The serial clock pin SCA of the frequency modulation wireless transmitting chip U1 is connected to the serial clock end SCA of the main control module 140 and further connected to the 3.3V power supply through the resistor R11. The radio frequency output pin RFO of the frequency modulation wireless transmitting chip U1 is grounded through the inductor L1 and connected to the base of the switching tube Q5 through the capacitor C5. The resistor R26 is connected in parallel to the base and the collector of the switching tube Q5. The emitter of the switching tube Q5 is grounded. The collector of the switching tube Q5 is connected to the antenna ANT through the capacitor C22. The collector of the switching tube Q5 is further connected to the 3.3V power supply through the parallel-connected capacitor C21 and inductor L3. The model of the frequency modulation wireless transmitting chip U1 can be QN8027. The main control module 140 can communicate with the frequency modulation wireless transmitting chip U1 through the serial data end SDA and the serial clock end SCA, set the frequency modulation frequency and the transmitting state of the frequency modulation wireless transmitting chip U1, etc.

[0040] In a specific implementation, the main control module 140 can adopt a microprocessor, for example, the model STC8H1K08.

[0041] In some embodiments, referring to Figure 5 The wireless listener 100 further comprises a communication module 160 connected to the main control module 140, for receiving the setting information of the frequency modulation frequency.

[0042] In a specific implementation, the wireless listener 100 can communicate with the host computer through the communication module 160 and set the frequency modulation frequency of itself.

[0043] In some embodiments, referring to Figure 6 The communication module 160 comprises a USB interface USB1 and a USB bus conversion chip U13. The serial data transmitting end TXD and the serial data receiving end RXD of the main control module 140 are connected to the USB bus conversion chip U13. The USB bus conversion chip U13 can realize mutual conversion between the USB and the serial port. The USB bus conversion chip U13 is connected to the USB interface USB1. The USB interface USB1 adopts a TYPEC type interface.

[0044] In some embodiments, referring to Figures 7 to 10 The wireless listener 100 further comprises an upper shell 170 and a lower shell 180, and a circuit board 190 is arranged between the upper shell 170 and the lower shell 180, and the acquisition module 110, the signal conditioning module 120, the frequency modulation wireless transmitting module 130 and the main control module 140 are all arranged on the circuit board 190.

[0045] In some embodiments, referring to Figure 11 The acquisition module 110 comprises a cap-shaped shell 111, a metal plate 112 and a piezoelectric ceramic 113, the cap-shaped shell 111 is provided with a through hole 1111 in the middle, the metal plate 112 is fixedly arranged in the cap-shaped shell 111, and the piezoelectric ceramic 113 is fixedly arranged below the metal plate 112; the circuit board 190 is provided with a sensor mounting bracket 191, the sensor mounting bracket 191 supports the outer edge of the cap-shaped shell 111, the upper shell 170 is provided with a sensor mounting hole 171, and the top of the cap-shaped shell 111 is exposed outside the sensor mounting hole 171. The piezoelectric ceramic 113 arranged below the metal plate 112 can sense sound and / or vibration, and based on the piezoelectric effect, induced electric charges are generated on the surface, signal lines can be arranged on the lower surfaces of the metal plate 112 and the piezoelectric ceramic 113 respectively, and the induced signals can be obtained. The arrangement of the sensor mounting hole 171 of the upper shell 170 and the through hole 1111 of the cap-shaped shell 111 facilitates the piezoelectric ceramic 113 to sense external sound, and the metal plate 112 can also play a certain protective role. The sensor mounting bracket 191 of the circuit board 190 can be ring-shaped, and the metal plate 112 and the piezoelectric ceramic 113 are arranged between the sensor mounting bracket 191 and the cap-shaped shell 111, which facilitates the sensing of vibration.

[0046] In some embodiments, referring to Figures 7 to 10 The wireless listener 100 further comprises an indicator light 192, a key switch 193 and a key 194, the indicator light 192 and the key switch 193 are both arranged on the circuit board 190, and the indicator light 192 and the key switch 193 are both connected to the main control module 140; the light emitted by the indicator light 192 is transmitted from the back of the lower shell 180, for example, from the light transmission hole 182; the key 194 is arranged in the key mounting hole 181 of the lower shell 180, and the key switch 193 is triggered by pressing the key 194.

[0047] In specific implementation, the indicator light 192 can be a light-emitting diode, which can emit light according to the control of the main control module 140 to indicate the boot operation or the signal strength sensed, etc. The key 194 and the key switch 193 are used to obtain the control operation of the user, such as booting / shutting down, etc.

[0048] In some embodiments, the power module 150 comprises a battery, and the battery is arranged in a battery compartment 183 of the lower shell. The battery compartment 183 can be closed by a battery compartment cover 184.

[0049] In a specific embodiment, referring to Figure 12 , the power module 150 further comprises a PMOS tube Q1, an NMOS tube Q2, a double diode D2, a resistor R24 and a resistor R25. The positive pole of the battery is connected to the source of the PMOS tube Q1 after being connected to the VIN terminal, the drain of the PMOS tube Q1 is used as the power supply terminal BATT+, the gate of the PMOS tube Q1 is connected to the drain of the NMOS tube Q2, the source of the NMOS tube Q2 is grounded, the power control terminal POW_EN of the main control module 140 is connected to the source of the NMOS tube Q2, the two ends of the resistor R24 are respectively connected to the source and the gate of the PMOS tube Q1, the two ends of the resistor R25 are respectively connected to the source and the gate of the NMOS tube Q2, the two anodes of the double diode D2 are respectively connected to the gate of the PMOS tube Q1 and the key signal terminal SW of the main control module 140, and the cathode of the double diode D2 is grounded through the key switch KEY. The user long-presses the key to turn on the key switch KEY, the gate of the PMOS tube Q1 is grounded through the double diode D2 and the key switch KEY, the PMOS tube Q1 is turned on, the device can obtain power supply through the power supply terminal BATT+, and the key signal terminal SW is also pulled low. The main control module 140 makes the power control terminal POW_EN high, so as to turn on the NMOS tube Q2, and then make the gate of the PMOS tube Q1 low, so as to keep the PMOS tube Q1 turned on.

[0050] Referring to Figure 12 , the power module 150 further comprises an NMOS tube Q3, a resistor R3 and a resistor R6. The resistor R3 and the resistor R6 are connected in series between the power supply terminal BATT+ and the ground, the source of the NMOS tube Q3 is grounded, the drain is connected to the negative pole BATT- of the battery, and the gate is connected to the series connection point of the resistor R3 and the resistor R6. When the battery supply voltage is normal, the voltage level of the power supply terminal BATT+ divided by the resistor R3 and the resistor R6 can make the NMOS tube Q3 turned on, and the battery continues to discharge. When the battery supply voltage is too low, the voltage level of the power supply terminal BATT+ divided by the resistor R3 and the resistor R6 cannot make the NMOS tube Q3 turned on, and the battery stops discharging.

[0051] Referring to Figure 12 , the power module 150 further comprises a voltage conversion module 151, which is used to convert the battery output voltage to 3.3V voltage.

[0052] In some embodiments, referring to Figures 7 to 10 , two supports 185 are arranged on each side of the lower shell 180, and a mounting column 186 is arranged between the two supports 185 on each side. The mounting column 186 forms a gap 187 with the side surface of the lower shell 180. The user can set the binding belt to pass through the gap 187, so as to fix the wireless listener 100 to the vehicle.

[0053] In a specific implementation, referring to Figures 7 to 10 The lower shell 180 is further provided with an antenna accommodating portion 188 for accommodating an antenna in the frequency modulation wireless transmitting module 130.

[0054] The utility model is not limited to the above optional implementation, anyone can draw other various forms of product under the enlightenment of the utility model, but no matter make any change in its shape or structure, any technical scheme falling into the scope defined by the claims of the utility model falls within the protection scope of the utility model.

Claims

1. A wireless listening device, characterized by The wireless listener comprises a plurality of wireless listeners with different frequency modulation frequencies, each of the wireless listeners comprises a collecting module, a signal conditioning module, a frequency modulation wireless transmitting module, a master control module and a power module; the collecting module is used for collecting vibration and / or sound to obtain a first signal; the signal conditioning module is connected to the collecting module and is used for filtering and conditioning the first signal and power amplification to obtain a second signal; the frequency modulation wireless transmitting module is connected to the signal conditioning module and is used for wirelessly transmitting the second signal by frequency modulation; the master control module is connected to the frequency modulation wireless transmitting module and is used for controlling the frequency modulation frequency; and the power module is used for providing power for the devices on the wireless listener.

2. A wireless listening device according to claim 1, wherein, The collecting module comprises a piezoelectric ceramic vibration sensor, and the first signal is obtained through the piezoelectric ceramic vibration sensor.

3. The wireless listening device of claim 1, wherein, The signal conditioning module comprises a filter amplification unit and an audio power amplification unit; the filter amplification unit is used for filtering and amplifying the first signal collected by the collecting module; the audio power amplification unit is connected to the master control module and the filter amplification unit, and is used for receiving an enabling signal of the master control module and an output signal of the filter amplification unit; when the enabling signal of the master control module is received, the output signal of the filter amplification unit is power amplified to obtain a second signal in the form of a double-channel audio signal.

4. The wireless listening device of claim 1, wherein, The wireless listener further comprises a communication module connected to the master control module and used for receiving setting information of the frequency modulation frequency.

5. A wireless listening device according to claim 4, wherein, The communication module comprises a USB interface and a USB / serial port conversion chip.

6. The wireless listening device of claim 1, wherein, The wireless listener further comprises an upper shell and a lower shell, a circuit board is arranged between the upper shell and the lower shell, and the collecting module, the signal conditioning module, the frequency modulation wireless transmitting module and the master control module are arranged on the circuit board.

7. A wireless listening device according to claim 6, wherein, The collecting module comprises a cap-shaped shell, a metal plate and a piezoelectric ceramic, a through hole is arranged in the middle of the cap-shaped shell, the metal plate is fixedly arranged in the cap-shaped shell, and the piezoelectric ceramic is fixedly arranged below the metal plate; the circuit board is provided with a sensor mounting rack supporting the outer edge of the cap-shaped shell, the upper shell is provided with a sensor mounting hole, and the top of the cap-shaped shell is exposed from the sensor mounting hole.

8. A wireless listening device according to claim 6, wherein, The wireless listener further comprises an indicator light, a key switch and a key, the indicator light and the key switch are arranged on the circuit board, and the indicator light and the key switch are connected to the master control module; light emitted by the indicator light is transmitted from the back of the lower shell, the key is arranged in a key mounting hole of the lower shell, and the key switch is triggered by pressing the key.

9. The wireless listening device of claim 6, wherein, The power module comprises a battery, and the battery is arranged in a battery compartment of the lower shell.

10. The wireless listening device of claim 6, wherein, Each side of the lower shell is provided with two supports, and a mounting column is arranged between the two supports on each side, and the mounting column forms a gap with the side surface of the lower shell.

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