油位传感装置技术领域 本发明涉及一种传感器，具体是指油位传感装置。 Oil level sensing device Technical Field  The present invention relates to a sensor, specifically refers to an oil level sensing device. 背景技术 传统的汽车传感器就是一个滑动变阻器，阻值由一个浮子控制，随着油位的变化，阻值也随之变化。  Traditional vehicle sensor is a slide rheostat, the resistance is controlled by a float, the oil level varies, the resistance also changes. 在加载电压固定的条件下，输出电流变化，电流值反映到汽车仪表上，按照一定的比例转换油位。 At constant applied voltage, the output current changes, the current value reflected in the car dashboard, according to a certain proportion of oil conversion. 此种油位传感器自汽车发明以来一直沿用了上百年的时间，随着汽车的电子化、智能化、网络化的发展，传统的油位传感器的弊端越来越明显，其精度差、损坏率高、线性不好以及跟车辆的智能电子设备对接困难，已经跟不上目前汽车整车性能提升的步伐；传统的汽车传感器为浮子杠杆结构，颠簸路况极易致命损坏。 Such oil level sensor since the invention of the automobile has been used for hundreds of years, with the development of automotive electronics, intelligent, network-based, the drawbacks of conventional oil level sensor is more and more obvious, its accuracy, failure rate high linearity is not good and difficult with intelligent electronic device docking vehicle, it has not kept pace with the current performance of the automobile; traditional automotive sensors for the float lever structure, bumpy roads easily fatal damage. 发明内容 本发明通过设置油位传感装置，来解决传统传感器的精度差等问题，达到精确检测油位的目的。  The present invention is provided by the oil level sensing device, to solve the problems of the conventional sensor of poor accuracy, achieve precise detection of the oil level.  本发明的目的通过以下技术方案来达到: 本发明包括壳体、感应电极、电容转换电路和油量显示器，感应电极和电容转换电路置于壳体内，所述电容转换电路分别与感应电极和壳体相连，所述油量显示器与电容转换电路相连。  The object of the present invention is achieved by the following technical scheme: The present invention comprises a housing, a sensing electrode, and the capacitance converter circuit monitors fuel induction electrode and the capacitor switching circuit disposed within the housing, respectively, said converting circuit capacitance sensing and a housing connected to the electrodes, and the capacitor is connected to the display conversion circuit oil. 壳体和感应电极构成一个同轴的容器，当油开始与容器接触后，引起壳体和感应电极之间电容量的变化，这个变化量通过电容转换电路的转换，输出4〜20mA标准信号供给油量显示器。 And a housing sensing electrodes coaxial container, when the container comes into contact with the oil, causing changes in the capacitance between the housing and the sensing electrode, the capacitance variation amount converting circuit by conversion, supplied to the output standard signal 4~20mA oil display. 当汽车行驶途中遇到较为复杂崎岖的地形时，油箱中的油面会剧烈晃动，其形成的冲击力会对传感装置造成一定的损伤；而本发明设置的封闭式壳体，可应对油面的冲击而较好地保护壳体内部的电容转换电路；由于结构简单，无任何可动或弹性元部件，因此可靠性较高，维护量很少。 When the vehicle encounters a more complex way with rough terrain, the oil in the tank will be shaken vigorously, the impact force sensing device formed will cause some damage; the hermetic housing of the present invention is provided, can cope with oil the shock better protect the interior of the housing capacitive conversion circuit; simple structure, no member may be movable or elastic element, thus higher reliability, less maintenance.  进一步地，所述电容转换电路包括CAV424芯片和AM402芯片，所述CAV424芯片分别与感应电极和壳体相连，所述AM402芯片与油量显示器相连。  Further, the circuit comprises a capacitance converter CAV424 AM402 chip and the chip, the chip CAV424 housing and connected to the sensing electrodes respectively connected to the fuel AM402 chip display. 油进入油箱内后，感应电极和壳体之间的电容变化经过CAV424芯片，CAV424芯片将电容信号转换为电信号传输至AM402芯片，AM402芯片再进行电压-电流的转换，最后输出4〜20mA标准信号供给油量显示器。 Into the oil tank, the capacitance between the sensing electrode and the housing through CAV424 chip, chip capacitors CAV424 signals into electrical signals transmitted to the chip AM402, AM402 chip then a voltage - current converter, the output of the last standard 4~20mA oil supplied display signal.  进一步地，所述壳体底部还设有O型橡胶圈。  Further, the bottom of said housing further provided with rubber O-rings. O型橡胶圈可直接套在壳体的根部上，在汽车运行时可缓冲掉传感装置与油箱之间的作用力，保证传感装置的正常工作。 Rubber O-ring may be set directly on the root of the housing, can be buffered in the car is running out force between the sensing means and the tank, to ensure the normal operation of the sensing means.  进一步地，所述壳体内部还设有避震器。  Further, the inner housing further provided with shock absorbers. 壳体内部，在感应电极的周围设置有避震器，防止汽车在特殊的路型或地段剧烈颠簸时油箱中的油面剧烈晃动冲击传感装置以至于造成传感装置的损毁。 Interior of the housing, with a shock absorber disposed around the sensing electrodes, to prevent the oil surface when the vehicle is severe turbulence in the specific way type or location in the tank shaken vigorously impact sensing means so as to cause damage to the sensing device.  进一步地，作为优选，所述壳体的长度为0.01〜lm。  Further, preferably, the length of the housing is 0.01~lm. 壳体的长度与油箱的容积高度相适应，多种长度的壳体可适用于各类车型，具有较高的实用性。 The length of the tank volume adapted to the height of the housing, the housing may be applicable to a variety of lengths of various types of vehicles, having a high practicability.  进一步地，作为优选，所述油量显示器为LED光柱显示器。  Further, preferably, the oil is an LED display monitor beam. LED光柱显示器拥有其特殊的优越性:一是光柱自身发光，醒目，便于远距离观察；二是光柱本身无机械传动部分，抗过载、抗振动性能好；三是光柱通过芯片矩阵排列，线性化处理，能精确示值；四是LED光柱的平均无故障工作时间达5万小时左右。 LED bargraph displays have their special advantages: First, self-luminous light beam, striking, facilitate remote observation; Second beam section itself has no mechanical transmission, anti-overload, a good anti-vibration performance; three chips arranged in a matrix by a light beam, linear process can accurately indication; Fourth LED light beam average time between failures of about 50,000 hours.  进一步地，作为优选，所述壳体材质为不锈钢。  Further, preferably, the housing made of stainless steel. 不锈钢材质的壳体结构结实，不会受到汽油、机油等的长时间侵蚀，能够保证传感装置稳定工作进行。 Strong stainless steel housing structure, will not be petrol, oil and other erosion time, sensing means to ensure a stable work.  本发明与现有技术相比，所具有以下的优点和有益效果: I本发明包括壳体、感应电极、电容转换电路和油量显示器，感应电极和电容转换电路置于壳体内，所述电容转换电路分别与感应电极和壳体相连，所述油量显示器与电容转换电路相连，设置的封闭式壳体，可应对油面的冲击而较好地保护壳体内部的电容转换电路；由于结构简单，无任何可动或弹性元部件，因此可靠性较高，维护量很少。  Compared with the prior art, it has the following advantages and benefits: I the present invention comprises a housing, a sensing electrode, and the capacitance converter circuit monitors fuel induction electrode and the capacitor switching circuit disposed within the housing, the capacitance converter circuit and the sensing electrodes respectively connected to the housing, the fuel conversion circuit and the capacitor connected to the display, the closed housing is provided, it can cope with the impact of the oil and better protect the interior of the housing capacitive conversion circuit ; simple structure, no member may be movable or elastic element, and therefore high reliability and little maintenance.  2本发明不锈钢材质的壳体结构结实，不会受到汽油、机油等的长时间侵蚀，能够保证传感装置稳定工作进行。  The housing structure 2 of the invention, solid stainless steel, will not be petrol, oil and other erosion time, sensing means to ensure a stable work. 附图说明 图1为本发明的结构示意图； 图2为电容转换电路的原理框图； 其中，附图标记对应的零部件名称如下: 1-电容转换电路、2-感应电极、3-壳体、4-油箱。 BRIEF DESCRIPTION structural diagram of  the present invention. FIG. 1; FIG. 2 is a block diagram of a capacitance converter circuit; wherein the reference numerals correspond to parts the following names: 1- capacitance converter circuit, the induction electrodes 2-, 3- housing, 4- tank. 具体实施方式 实施例1 如图1所示，本实施例包括壳体3、感应电极2、电容转换电路I和油量显示器,感应电极2和电容转换电路I置于壳体3内，所述电容转换电路I分别与感应电极2和壳体3相连，所述油量显不器与电容转换电路I相连。 DETAILED DESCRIPTION FIG Example 1  embodiment shown, this embodiment includes a housing 3, two sensing electrode, the capacitance converter circuit monitors I and oil, and the capacitive sensing electrode 2 I converting circuit 3 disposed within the housing the capacitance converter circuit I are connected to the sensing electrodes 2 and the housing 3, the oil does not significantly connected with the capacitive conversion circuit I. 壳体3和感应电极2构成一个同轴的容器,壳体3构成容器的当油开始与容器接触后，引起壳体3和感应电极2之间电容量的变化，这个变化量通过电容转换电路I的转换，输出4〜20mA标准信号供给油量显示器。 And the induction electrode housing 3 constitute a coaxial container 2, the rear housing 3 constituting the container when the container comes into contact with the oil, causing changes in the capacitance between the sensing electrode 3 and the housing 2, the switching circuit through a capacitance variation I conversion, the output signal supplied fuel 4~20mA standard display. 当汽车行驶途中遇到较为复杂崎岖的地形时，油箱4中的油面会剧烈晃动，其形成的冲击力会对传感装置造成一定的损伤；而本发明设置的封闭式壳体3，可应对油面的冲击而较好地保护壳体3内部的电容转换电路I ;由于结构简单，无任何可动或弹性元部件，因此可靠性较高，维护量很少。 When the vehicle encounters a more complex way with rough terrain, the oil tank 4 will be shaken vigorously, the impact force sensing device formed will cause some damage; the closed housing 3 of the present invention is provided, can cope oil impact and better protection of the interior of the housing 3 capacitive conversion circuit I; simple structure, no member may be movable or elastic element, thus higher reliability, less maintenance.  实施例2 如图1所示，本实施例在实施例1的基础上，所述电容转换电路I包括CAV424芯片和AM402芯片，所述CAV424芯片分别与感应电极2和壳体3相连，所述AM402芯片与油量显示器相连。  Example 2 shown in FIG. 1, in this embodiment, on the basis of the embodiment 1, the capacitance converter circuit including CAV424 I AM402 chip and a chip, the chip is connected to the sensing electrodes CAV424 2 and the housing 3, respectively connected to the fuel AM402 chip display. 油进入油箱4内后，感应电极2和壳体3之间的电容变化经过CAV424芯片，CAV424芯片将电容信号转换为电信号传输至AM402芯片，AM402芯片再进行电压-电流的转换，最后输出4〜20mA标准信号供给油量显示器实施例3 如图1所示，本实施例在实施例1的基础上，所述壳体3底部还设有O型橡胶圈，壳体3内部还设有避震器。 Into the oil tank 4, the change in capacitance between sensing electrodes 2 and the housing 3 through CAV424 chip, chip capacitors CAV424 signals into electrical signals transmitted to the chip AM402, AM402 chip then a voltage - current conversion, the final output 4 ~20mA reference signal supplied oil amount display embodiment 3 shown in FIG. 1, in this embodiment, on the basis of the embodiment 1, the bottom housing 3 is also provided with rubber O-ring, it is also provided to avoid the inner housing 3 shock absorber. O型橡胶圈可直接套在壳体3的根部上，在汽车运行时可缓冲掉传感装置与油箱4之间的作用力，保证传感装置的正常工作；在感应电极2的周围设置有避震器，防止汽车在特殊的路型或地段剧烈颠簸时油箱4中的油面剧烈晃动冲击传感装置以至于造成传感装置的损毁。 Rubber O-ring may be set directly on the root of the housing 3, the car can run off a buffer force between the sensing means and the tank 4, to ensure the normal operation of the sensing means; 2 disposed around the induction electrodes are shock, to prevent oil in the car severe turbulence specific way type or location in the tank 4 shaken vigorously sensing means so as to cause damage to the impact sensing device.  作为优选，所述壳体3的长度为0.01〜lm。  Advantageously, the length of the housing 3 is 0.01~lm. 壳体3的长度与油箱4的容积高度相适应，多种长度的壳体3可适用于各类车型，具有较高的实用性。 Length and height of the housing 3 of the tank volume 4 adapted to, the length of the housing 3 is applicable to a variety of types of vehicles, has high utility.  作为优选，所述油量显示器为LED光柱显示器。  Advantageously, the oil is an LED display monitor beam.  作为优选，所述壳体3材质为不锈钢。  Advantageously, the housing 3 is made of stainless steel.