ICP acceleration sensor power supply device

Abstract

A power supply unit comprises an LDO (Low Dropout Regulator) power supply device, a first current-limiting resistor, a second current-limiting resistor and a capacitor, an input port of the LDO power supply device is connected with a power supply, one end of the second current-limiting resistor is connected to an output port of the LDO power supply device through the first current-limiting resistor, and the other end of the second current-limiting resistor is connected with the capacitor. The first path is used for carrying out constant current source power supply on the ICP acceleration sensor, the second path is grounded through a capacitor, and the third path is connected to an LDO power supply device adjusting port; the heat dissipation unit comprises a central partition plate, a power source fixing plate, a heat dissipation block, a heat dissipation block isolation pad and a heat dissipation block restraining frame used for fixing the heat dissipation block, the power source fixing plate is arranged on the rear end face of the central partition plate, the heat dissipation block restraining frame is arranged on the front end face of the central partition plate, and the heat dissipation block isolation pad is arranged between the heat dissipation block restraining frame and the central partition plate. The power supply unit is arranged on the front end face of the heat dissipation block and located outside the heat dissipation block restraining frame. The device is suitable for measuring the voltage type acceleration sensor which needs to be supplied with power by a constant current source.

Description

Technical Field

[0001] The utility model relates to industrial sensor detection technology, and more specifically to an ICP acceleration sensor power supply device. Background Art

[0002] With the popularization of industrial fault monitoring systems, a large number of sensors will be used in industrial sites. Among the sensors, there is a type of ICP acceleration sensor that needs to be powered by a constant current source. The acceleration value is inverted according to the change in the voltage at both ends caused by the change in its acceleration.

[0003] The most commonly used method now is to use a dedicated constant current source chip to generate a standard constant current source. However, in outdoor extreme temperature environments, the operating temperature range of the existing constant current source does not meet the requirements of industrial extreme environments, such as low temperatures below -30°C or high temperatures above 60°C, such as -40°C or 70°C. The performance of some dedicated chips cannot be stable, or the process for improving stability is too complicated. At the same time, different constant current source chips have different requirements for input voltage. Different chips need to be adapted according to different input requirements, and it is impossible to unify the devices. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies in the prior art and to provide an ICP acceleration sensor power supply device, which greatly expands the use environment of the ICP acceleration sensor power supply and improves the overall system stability through the transformation of the power supply circuit and the heat dissipation structure.

[0005] The purpose of the utility model is achieved through the following technical solutions.

[0006] The utility model ICP acceleration sensor power supply device comprises a power supply unit and a heat dissipation unit, wherein the power supply unit comprises an LDO power supply device, a first current limiting resistor, a second current limiting resistor, and a capacitor, wherein the input port of the LDO power supply device is connected to a power supply, and the output port of the LDO power supply device performs constant current source power supply to the ICP acceleration sensor via the first current limiting resistor and the second current limiting resistor connected in series, wherein one end of the second current limiting resistor is connected to the output port of the LDO power supply device via the first current limiting resistor, and the other end is divided into three paths: the first path is connected to the ICP acceleration sensor, the second path is grounded via the capacitor, and the third path is connected to the adjustment port of the LDO power supply device;

[0007] The heat dissipation unit includes a central partition, a power supply fixing plate, a heat dissipation block, a heat dissipation block spacer and a heat dissipation block constraint frame for fixing the heat dissipation block, the power supply fixing plate is arranged on the rear end surface of the central partition, the heat dissipation block constraint frame is arranged on the front end surface of the central partition, a heat dissipation block spacer is arranged between the heat dissipation block constraint frame and the central partition, and the power supply unit is arranged on the front end surface of the heat dissipation block and is located outside the heat dissipation block constraint frame.

[0008] Furthermore, the LDO power supply device adopts an LM317 power supply chip.

[0009] Compared with the prior art, the beneficial effects brought about by the technical solution of the utility model are:

[0010] (1) The utility model uses a universal LDO power supply device, namely, the LM317 power supply chip. The LM317 power supply chip can uniformly expand the input voltage to 37V. With the cooperation of a current limiting resistor, it outputs a 4mA constant current to supply constant current source power to the ICP acceleration sensor.

[0011] (2) The utility model adopts a heat dissipation unit to dissipate heat from the power supply unit, expanding the temperature range to -40°C to 70°C, adapting to more industrial scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a circuit schematic diagram of the power supply unit in the utility model.

[0013] Figure 2 It is a front view of the heat dissipation unit in the utility model.

[0014] Figure 3 It is a side view of the heat dissipation unit in the utility model.

[0015] Figure 4 It is a rear view of the heat dissipation unit in the utility model.

[0016] Figure markings: 1-central partition, 2-power supply fixing plate, 3-heat sink, 4-heat sink spacer, 5-heat sink constraint frame, 6-bolt, ICI3-LDO power supply device, R45-first current limiting resistor, R46-second current limiting resistor, C41-capacitor, GND-ground. DETAILED DESCRIPTION

[0017] The utility model is further described below in conjunction with the accompanying drawings.

[0018] The utility model discloses an ICP acceleration sensor power supply device, which mainly consists of a power supply unit and a heat dissipation unit. The power supply unit is used to provide a stable constant current source for the ICP acceleration sensor, and the heat dissipation unit is used to dissipate heat from the power supply unit to adapt to different temperature environments.

[0019] like Figure 1 As shown, the power supply unit includes an LDO power supply device ICI3, a first current limiting resistor R45, a second current limiting resistor R46, and a capacitor C41. The input port IN of the LDO power supply device ICI3 is connected to a power source (i.e. Figure 1PV24 is connected to the power supply), the output port OUT of the LDO power supply device ICI3 is connected to the ICP acceleration sensor through the first current limiting resistor R45 and the second current limiting resistor R46 connected in series as a constant current source, one end of the second current limiting resistor R46 is connected to the output port OUT of the LDO power supply device ICI3 through the first current limiting resistor R45, and the other end is divided into three paths: the first path is connected to the ICP acceleration sensor (i.e. Figure 1 IEPE2+ is connected to the ICP acceleration sensor), the second path is connected to the ground GND through the capacitor C41, and the third path is connected to the LDO power supply device ICI3 adjustment port ADJUST. Among them, the LDO power supply device ICI3 can use the LM317 power supply chip, which can uniformly expand the input voltage to 37V, and output 4mA constant current with the cooperation of the first current limiting resistor R45 and the second current limiting resistor R46 to provide constant current source power for the ICP acceleration sensor. The resistance value of the first current limiting resistor R45 is 300 ohms, the resistance value of the second current limiting resistor R46 is 12 ohms, and the capacitance value of the capacitor C41 is 100pF.

[0020] like Figures 2 to 4 As shown, the heat dissipation unit includes a central partition 1, a power supply fixing plate 2, a heat dissipation block 3, a heat dissipation block spacer 4, and a heat dissipation block constraint frame 5 for fixing the heat dissipation block 3. The power supply fixing plate 2 is arranged at the rear end face of the central partition 1 for fixing the power supply. The heat dissipation block constraint frame 5 is fixed to the front end face of the central partition 1 by bolts 6 (cross-slot cylindrical head bolts can be used), and a heat dissipation block spacer 4 is arranged between the heat dissipation block constraint frame 5 and the central partition 1. The power supply unit is arranged at the front end face of the heat dissipation block 3 and is located outside the heat dissipation block constraint frame 5.

[0021] The utility model uses a universal LDO power supply device, LM317 power supply chip, in conjunction with a first current limiting resistor R45 and a second current limiting resistor R46, to supply constant current to the ICP acceleration sensor, detects the voltage generated by the constant current source after passing through the ICP acceleration sensor, and the embedded program uses the built-in ICP acceleration sensor sensitivity to invert the acceleration value. On the heat dissipation unit, the LM317 power supply chip can use a model with a heat dissipation package, and a heat dissipation block is uniformly used for heat dissipation to expand the constant current source supply current.

[0022] The utility model combines the heat dissipation structure and the power supply circuit in design and utilizes the LM317 power supply chip to uniformly expand the input voltage to 37V. At the same time, due to the special heat dissipation unit, the same LM317 can be used to expand the temperature range to -40℃~70℃, adapting to more industrial scenarios.

[0023] Although the functions and working processes of the utility model are described above in conjunction with the accompanying drawings, the utility model is not limited to the above-mentioned specific functions and working processes, and the above-mentioned specific implementation methods are merely illustrative rather than restrictive. Under the enlightenment of the utility model, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the utility model and the claims, which are all within the protection of the utility model.

Claims

1. An ICP acceleration sensor power supply device, comprising a power supply unit and a heat dissipation unit, characterized in that: The power supply unit comprises an LDO power supply device (ICI3), a first current limiting resistor (R45), a second current limiting resistor (R46), and a capacitor (C41); an input port of the LDO power supply device (ICI3) is connected to a power supply; an output port of the LDO power supply device (ICI3) supplies constant current power to the ICP acceleration sensor via the first current limiting resistor (R45) and the second current limiting resistor (R46) connected in series; one end of the second current limiting resistor (R46) is connected to the output port of the LDO power supply device (ICI3) via the first current limiting resistor (R45), and the other end is divided into three paths: a first path is connected to the ICP acceleration sensor, a second path is connected to ground (GND) via the capacitor (C41), and a third path is connected to the adjustment port of the LDO power supply device (ICI3); The heat dissipation unit comprises a central partition (1), a power supply fixing plate (2), a heat dissipation block (3), a heat dissipation block spacer (4), and a heat dissipation block restraining frame (5) for fixing the heat dissipation block (3); the power supply fixing plate (2) is arranged on the rear end surface of the central partition (1); the heat dissipation block restraining frame (5) is arranged on the front end surface of the central partition (1); a heat dissipation block spacer (4) is arranged between the heat dissipation block restraining frame (5) and the central partition (1); and the power supply unit is arranged on the front end surface of the heat dissipation block (3) and is located outside the heat dissipation block restraining frame (5).

2. The ICP acceleration sensor power supply device according to claim 1, characterized in that: The LDO power supply device (ICI3) adopts the LM317 power supply chip.

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