阅读说明：本技术 高灵敏度鼓式刹车高温报警感应系统及其对码调试方法 (High-sensitivity drum brake high-temperature alarm sensing system and code matching debugging method thereof ) 是由 朱克荣 于 2019-11-08 设计创作，主要内容包括：本发明公开了一种高灵敏度鼓式刹车高温报警感应系统及对码调试方法,系统包括报警装置和与多个感应装置,感应装置包括温控开关、无线收发模块、电池单元以及隔热保护壳,当刹车鼓轮温度超过预设阈值时,温控开关触发无线收发模块发出带编码的无线报警信号至报警装置中,报警装置中设置有语音模块,当报警装置收到带编码的无线报警信号时,通过语音模块播放与带编码的无线报警信号相对应的语音报警信息。其效果是：结构紧凑,安装方便,安全性好,能够有效适用于汽车轮鼓高温工作环境,低功耗,电池续航能力强,而且温度感应更加精准。(The invention discloses a high-sensitivity drum brake high-temperature alarm sensing system and a code matching debugging method, wherein the system comprises an alarm device and a plurality of sensing devices, each sensing device comprises a temperature control switch, a wireless transceiving module, a battery unit and a heat insulation protective shell, when the temperature of a brake drum exceeds a preset threshold value, the temperature control switch triggers the wireless transceiving module to send out a wireless alarm signal with a code to the alarm device, a voice module is arranged in the alarm device, and when the alarm device receives the wireless alarm signal with the code, voice alarm information corresponding to the wireless alarm signal with the code is played through the voice module. The effect is as follows: compact structure, simple to operate, the security is good, can effectively be applicable to car wheel drum high temperature operational environment, low-power consumption, and battery duration is strong, and temperature-sensing is more accurate moreover.)

1. A high-sensitivity drum brake high-temperature alarm sensing system is characterized by comprising an alarm device and a plurality of sensing devices wirelessly connected with the alarm device, the sensing device comprises a temperature control switch for sensing the temperature of the brake drum, a wireless transceiver module for sending a high-temperature alarm signal, a battery unit for supplying power to the wireless transceiver module, and a heat insulation protective shell for accommodating the wireless transceiver module and the battery unit, when the temperature of the brake drum exceeds a preset threshold value, the temperature control switch triggers the wireless transceiving module to send out a wireless alarm signal with codes to the alarm device, a voice module is arranged in the alarm device, when the alarm device receives the wireless alarm signal with the code, the voice alarm information corresponding to the wireless alarm signal with the code is played through the voice module.

2. The high-sensitivity drum brake high-temperature alarm sensing system according to claim 1, wherein a heat conducting member for attaching to a brake drum is connected to the heat insulation protective shell, a heat conducting cavity is formed on the heat conducting member, the temperature control switch is arranged in the heat conducting cavity, and heat conducting oil is further filled in the heat conducting cavity.

3. The high-sensitivity drum brake high-temperature alarm sensing system according to claim 2, wherein the heat conducting cavity is formed by enclosing the heat conducting member and an outer wall of the heat insulation protective shell.

4. The high-sensitivity drum brake high-temperature alarm system according to any one of claims 1 to 3, wherein the temperature controlled switch is a normally open or normally closed bimetallic switch.

5. The high-sensitivity drum brake high-temperature alarm sensing system according to claim 1, wherein the wireless transceiver module comprises a wireless transceiver chip of a model number of CMT2150L, and a crystal oscillator module, an antenna circuit and a power supply filter circuit are connected to the wireless transceiver chip.

6. The high-sensitivity drum brake high-temperature alarm sensing system according to claim 1, wherein the number of the sensing devices is 2-16, and is suitable for the number of applied vehicle brake drums.

7. The high sensitivity drum brake high temperature alarm sensing system of claim 1, wherein the thermally conductive member is provided with an abutment surface adapted to the drum surface of the brake drum, and the thermally conductive member is in close contact with and welded to the drum surface of the brake drum.

8. The high-sensitivity drum brake high-temperature alarm sensing system according to claim 1, wherein the antenna of the wireless transceiver module is embedded in the heat insulation protective shell, and the heat insulation protective shell is made of a non-electromagnetic shielding material.

9. The high-sensitivity drum brake high-temperature alarm sensing system according to claim 1, wherein the alarm device comprises a storage module and a data interface, the storage module is used for storing alarm record information, and the data interface is used for deriving the stored information in the storage module.

10. The code matching debugging method of the high-sensitivity drum brake high-temperature alarm sensing system according to any one of claims 1 to 9, comprising the following steps:

s1: pre-storing N pieces of debugging voice prompt information and corresponding alarm voice prompt information in the alarm device according to a preset sequence;

s2: clearing the paired coded information by long pressing the first key, and entering a code matching debugging process;

s3: the value of the counter n is adjusted by pressing a first key for a short time, two wiring terminals of the temperature control switch are triggered to be in short circuit, the temperature control switch in the sensing device is enabled to send out a wireless alarm signal with codes, and a normally-open bimetallic strip switch is selected as the temperature control switch;

s4: when the alarm device receives the wireless alarm signal with the code, the received wireless alarm signal with the code and the nth section of alarm voice prompt information are broadcasted through the voice module, and the corresponding debugging voice prompt information is broadcasted;

s5: confirming the associated alarm information through a second key, and entering an alarm monitoring process;

s6: in the process of alarm monitoring, when the alarm device receives any one associated wireless alarm signal with codes, the voice module broadcasts corresponding alarm voice prompt information.

Technical Field

The invention relates to an automobile electronic product, in particular to a high-sensitivity drum brake high-temperature alarm sensing system and a code matching debugging method thereof.

Background

Drum brakes have been used in automobiles for a century ago, but are still being deployed today on many models (mostly for rear wheels) due to their reliability and strong braking force. It is fixed to the tyre and rotates at the same speed. During braking, the brake shoe is pushed by hydraulic pressure to contact the inner edge of the brake drum, and the friction force generated by the contact is used to restrain the rotation of the tire so as to achieve the purpose of braking. The drum brake consists of a brake bottom plate, a brake cylinder, a brake shoe and other relevant connecting rods, a spring, a pin nail and a brake drum. Currently, the rear wheel is generally mounted. The drum brake has low cost and high absolute braking force, and the inner surface of the brake drum of the drum brake is the position of the brake device for generating brake torque. The diameter of the brake drum of a drum brake assembly can be much smaller than the diameter of the brake disc of a disc brake assembly to achieve the same braking torque. Therefore, large vehicles for heavy loads can only be equipped with drum brakes in a limited space of the rim in order to obtain a strong braking force.

However, the diameter of the brake drum of the drum brake is increased after the brake drum is heated, so that the stroke of stepping on the brake pedal is increased, and the brake reaction is easy to happen to be not as expected. Therefore, when a vehicle adopting drum brakes is driven, the phenomenon that the brake pad is subjected to heat fading due to high temperature caused by continuous braking is avoided as much as possible. There are also medium reports that the brake drum of many trucks is overheated to cause major safety accidents such as brake failure, spontaneous combustion of tires, vehicle explosion, etc.

In view of the above, many researchers have proposed the related art for monitoring the temperature of the brake drum, such as a device for monitoring the temperature of the brake drum of a large truck disclosed in chinese patent 201120039699.4, and a method and a device for measuring the temperature of the brake drum of an automobile by using a contact thermistor disclosed in chinese patent 201310355354.3. The temperature of the brake drum of the automobile is obtained through equipment such as a thermal infrared sensor or a thermistor, and therefore brake high-temperature alarming is achieved.

The wheel has a severe running environment, and particularly when the wheel runs on a road with sludge and riprap, the thermal infrared sensor is easy to damage, so that monitoring failure is caused; secondly, various monitoring devices have weak protection measures, and the monitoring devices are easily melted at high temperature under the high-temperature state of the brake drum; thirdly, the energy consumption of various existing monitoring devices is large, the endurance capacity of a common battery is insufficient, and the power supply of the devices is often insufficient due to untimely maintenance.

Disclosure of Invention

Based on the above defects, the first objective of the present invention is to provide a high-sensitivity drum brake high-temperature alarm sensing system which has a simple structure, is convenient to install, and can be safely operated for a long time.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

a high-sensitivity drum brake high-temperature alarm sensing system is characterized by comprising an alarm device and a plurality of sensing devices wirelessly connected with the alarm device, the sensing device comprises a temperature control switch for sensing the temperature of the brake drum, a wireless transceiver module for sending a high-temperature alarm signal, a battery unit for supplying power to the wireless transceiver module, and a heat insulation protective shell for accommodating the wireless transceiver module and the battery unit, when the temperature of the brake drum exceeds a preset threshold value, the temperature control switch triggers the wireless transceiving module to send out a wireless alarm signal with codes to the alarm device, a voice module is arranged in the alarm device, when the alarm device receives the wireless alarm signal with the code, the voice alarm information corresponding to the wireless alarm signal with the code is played through the voice module.

The temperature control switch is adopted to sense the temperature change condition of the brake drum wheel, when the temperature exceeds a preset range, the state of the temperature control switch can be changed, and then the wireless transceiving module is triggered to send alarm information based on the state change of the temperature control switch; under the temperature normal condition, wireless transceiver module is in low-power consumption dormant state, can effectively prolong battery unit's life, adopt wireless transmission and insulate against heat and protect wireless transceiver module and battery unit by thermal-insulated protective housing, can prevent to damage, ensure that the circuit normally works, each induction system sends out the wireless alarm signal of area code, alarm device can take the measure of dealing with in time through the unusual concrete position of voice broadcast temperature, the driver of being convenient for.

Optionally, a heat conduction member for attaching to the brake drum is connected to the heat insulation protective shell, a heat conduction cavity is formed in the heat conduction member, the temperature control switch is arranged in the heat conduction cavity, and heat conduction oil is filled in the heat conduction cavity.

Optionally, the heat conducting cavity is formed by enclosing the heat conducting member and an outer wall of the heat insulation protective shell.

Optionally, the temperature-controlled switch is a normally open or normally closed bimetallic strip switch.

Optionally, the wireless transceiver module includes a wireless transceiver chip of the model CMT2150L, and a crystal oscillator module, an antenna circuit, and a power supply filter circuit are connected to the wireless transceiver chip.

Optionally, the number of the sensing devices is 2-16, and is suitable for the number of the applied vehicle brake drums.

Optionally, the heat conducting member is provided with an abutting surface adapted to a drum surface of the brake drum, and the heat conducting member is closely abutted to the drum surface of the brake drum and is welded and fixed.

Optionally, the antenna of the wireless transceiver module is embedded in the heat insulation protective shell, and the heat insulation protective shell is made of a non-electromagnetic shielding material.

Optionally, the alarm device includes a storage module and a data interface, the storage module is configured to store alarm record information, and the data interface is configured to derive storage information in the storage module.

Based on the system, the invention also provides a code matching debugging method, which is carried out according to the following steps:

s1: pre-storing N pieces of debugging voice prompt information and corresponding alarm voice prompt information in the alarm device according to a preset sequence;

s2: clearing the paired coded information by long pressing the first key, and entering a code matching debugging process;

s3: the value of the counter n is adjusted by pressing a first key for a short time, two wiring terminals of the temperature control switch are triggered to be in short circuit, the temperature control switch in the sensing device is enabled to send out a wireless alarm signal with codes, and a normally-open bimetallic strip switch is selected as the temperature control switch;

s4: when the alarm device receives the wireless alarm signal with the code, the received wireless alarm signal with the code and the nth section of alarm voice prompt information are broadcasted through the voice module, and the corresponding debugging voice prompt information is broadcasted;

s5: confirming the associated alarm information through a second key, and entering an alarm monitoring process;

s6: in the process of alarm monitoring, when the alarm device receives any one associated wireless alarm signal with codes, the voice module broadcasts corresponding alarm voice prompt information.

The invention has the following remarkable effects:

compact structure, simple to operate, the security is good, can effectively be applicable to car wheel drum high temperature operational environment, low-power consumption, battery duration is strong, and temperature-sensing is more accurate moreover, can give corresponding audio alert suggestion to high temperature abnormal position.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a diagram of the topology of the system of the present invention.

Fig. 2 is a schematic block diagram of the system circuitry of the present invention.

FIG. 3 is a diagram of an installation configuration of an induction device in an embodiment of the present invention;

FIG. 4 is a schematic circuit diagram of an inductive device in accordance with an embodiment of the present invention;

fig. 5 is a flow chart of a method of the present invention.

The labels in FIG. 3 are: the device comprises a temperature control switch 1, a wireless transceiving module 2, a battery unit 3, a heat insulation protective shell 4, a heat conducting piece 5 and heat conducting oil 6.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Referring to fig. 1, the invention provides a high-sensitivity drum brake high-temperature alarm sensing system, which includes 1 alarm device and N sensing devices wirelessly connected to the alarm device, wherein the number of the sensing devices is adapted to the number of applied vehicle brake drums, and the sensing devices can support 16 channels at most, i.e. N can be 16, and can independently detect the brake of each tire.

As can be seen from fig. 2 and 3, the sensing device includes a temperature control switch 1 for sensing the temperature of the brake drum, a wireless transceiver module 2 for sending a high temperature alarm signal, a battery unit 3 for supplying power to the wireless transceiver module, and a heat insulation protective housing 4 for accommodating the wireless transceiver module 2 and the battery unit 3, when the temperature of the brake drum exceeds a preset threshold, the temperature control switch 1 triggers the wireless transceiver module 2 to send a coded wireless alarm signal to the alarm device, and the coded wireless alarm signal corresponds to the installation position of the alarm device; the alarm device is provided with a voice module, and when the alarm device receives the wireless alarm signal with the code, voice alarm information corresponding to the wireless alarm signal with the code is played through the voice module.

As shown in fig. 4, in this embodiment, the temperature control switch 1 may adopt a normally open or normally closed bimetallic strip switch, as an implementation manner, a closed temperature controller with a model number of KSD9700 is adopted, the wireless transceiver module 2 includes a wireless transceiver chip with a model number of CMT2150L, the temperature control switch 1 is connected between a switch signal pin of the wireless transceiver chip and a power ground terminal, the wireless transceiver chip is connected with a crystal oscillator module, an antenna circuit and a power filter circuit, and the battery unit adopts a button battery. As can be seen from fig. 2, in the drawing, Y1 denotes a crystal oscillator module, which provides a clock signal for the wireless transceiver chip, VCC provides a working power supply for the button battery, an antenna circuit is formed by the inductor L1, the inductor L2, the capacitor C1, and the capacitor C2, and is used for transmitting a wireless signal outwards, the capacitor C0 and the capacitor C5 are power filter circuits, and the temperature-controlled switch 1 is equivalent to the switch element K1. In a low-temperature state, the switch is closed, and a switch signal pin of the wireless transceiving chip is grounded, so that a low-power-consumption dormant state is maintained; along with the rise of temperature, the inside of the temperature control switch 1 deforms, when the preset temperature threshold value is reached, the temperature control switch 1 is automatically switched off, the wireless transceiver chip receives a switch trigger signal, automatically wakes up to send a section of wireless signal, receives the final draft and can make an alarm response by receiving the wireless signal, so that a driver is prompted to pay attention to the temperature of the wheel drum, and timely treatment measures are convenient to take.

As another embodiment, the temperature control switch 1 is a normally open switch, is connected in series with a power line, is disconnected at low temperature, and is powered on only at high temperature to trigger the wireless transceiver chip to work, so that energy consumption is saved.

As can also be seen from fig. 3, in order to enable the temperature control switch 1 to more accurately sense the temperature of the automobile wheel drum, the heat-conducting member 5 for attaching to the brake drum wheel is connected to the heat-insulating protective shell 4, a heat-conducting cavity is formed on the heat-conducting member 5, the temperature control switch 1 is arranged in the heat-conducting cavity, and heat-conducting oil 6 is further filled in the heat-conducting cavity.

The temperature control switch 1 can be directly attached to the brake drum wheel, but the contact surface is limited, so that on one hand, the fixation is inconvenient, and the product is easy to fall off; on the other hand, the heat conduction efficiency is low, the temperature detection is inaccurate, and the heat conduction piece 5 is additionally arranged, so that the installation and the fixation are convenient, and the falling-off is prevented; and the contact area can be increased, the heat conduction efficiency is improved, meanwhile, the temperature control switch 1 is completely coated by the heat conduction oil 6, and the detection precision is higher.