CN204757931U - Height detection early warning device is piled to grain - Google Patents

Abstract

The utility model discloses a grain pile height detection and early warning device, which comprises a single-chip microcomputer connected to a photosensitive resistance array module, an alarm, a wireless communication module communicating with an intelligent terminal, and a display terminal for displaying the height value of grain piles; the photosensitive resistance array module includes A plurality of photosensitive detection units that detect the light intensity change caused by the photoresistor being buried by the grain pile or exposed outside the grain pile through the photoresistor, and each photosensitive detection unit is arranged at a predetermined height in the granary. The utility model sends the alarm information to the intelligent terminal through the wireless communication module when the height of the grain pile is abnormal, so that the granary supervisors can make reasonable decisions in time; Theft and other situations occur; simple and efficient, easy to maintain, strong practicability, and has broad application prospects.

Description

A Grain Pile Height Detection and Early Warning Device

technical field

The utility model relates to the technical supervision field of grain storage, in particular to a grain pile height detection and early warning device.

Background technique

Food security is related to people's livelihood, and the supervision of grain storage is particularly important. At present, the management method of grain storage is relatively primitive, and manual measurement is generally used. This mode is time-consuming and labor-intensive, which is not conducive to large-scale intelligent grain storage. Although some high-tech means have been applied in the process of grain storage, such as ultrasonic measurement of the height of grain piles, the cost of use is high and it is not suitable for the actual environment of grain piles.

Utility model content

The technical problem to be solved by the utility model is to provide a grain pile height detection and early warning device, which can quickly detect the height of the grain pile and the change of the height of the grain pile. , to achieve the purpose of warehouse intelligent supervision.

For realizing above-mentioned technical problem, the technical scheme that the utility model adopts is:

A grain pile height detection and early warning device, comprising a single-chip microcomputer connected to a photoresistor array module, an alarm, a wireless communication module communicating with an intelligent terminal, and a display terminal for displaying the height value of a grain pile; the photoresistor array module includes multiple A photosensitive detection unit that detects the change of light intensity caused by the photoresistor being buried by the grain pile or exposed outside the grain pile through the photoresistor, and each photosensitive detection unit is arranged at a predetermined height in the granary.

Each of the photosensitive detection units includes a photoresistor, a signal amplifier, a pull-up resistor, and a comparison resistor; one end of the photoresistor is connected to one end of the comparison resistor and the input end of the signal amplifier, and the other end of the photoresistor is grounded; the pull-up resistor One end of the resistor is connected to the input end of the signal amplifier; the other end of the comparison resistor and the other end of the pull-up resistor are both connected to the power supply; the signal amplifying circuit amplifies the input signal and outputs it to the microcontroller.

The photosensitive detection units are arranged vertically on the wall of the granary.

The alarm adopts a loudspeaker.

The wireless communication module adopts a GPRS module.

The beneficial effects of the utility model are: 1. The utility model collects the light intensity change caused by the photoresistor being buried by the grain pile or exposed outside the grain pile through each photosensitive detection unit arranged at the predetermined height of the granary, and obtains the corresponding grain pile height When the height of the grain pile is abnormal, the alarm information is sent to the smart terminal through the wireless communication module, which is convenient for the grain warehouse supervisors to make reasonable decisions in time; 3. The utility model is simple and efficient, easy to maintain, strong in practicability, and has broad application prospects.

Description of drawings

Fig. 1 is a system frame diagram of the utility model.

Fig. 2 is a schematic diagram of the grain pile height detection circuit of the photosensitive detection unit of the present invention.

Detailed ways

The utility model is described in further detail below in conjunction with accompanying drawing and specific embodiment.

The utility model provides a grain pile height detection and early warning device, as shown in Fig. 1, including a single-chip microcomputer, the single-chip microcomputer is connected to a photosensitive resistance array module, an alarm (using a loudspeaker), a wireless communication module (using a GPRS module) for communicating with an intelligent terminal, and a grain display Display terminal for the heap height value. in:

The photoresistor array module includes a plurality of photosensitive detection units that detect the change of light intensity caused by the photoresistor being buried by the grain pile or exposed outside the grain pile through the photoresistor. Each photosensitive detection unit includes a comparison resistor R1, a pull-up resistor R2, a photoresistor R3, and a signal amplifier U1. See Figure 2. The connection relationship is as follows: one end of the photoresistor R3, one end of the comparison resistor R1, and the input of the signal amplifier U1 The other end of the photoresistor R3 is connected to the ground; one end of the pull-up resistor R2 is connected to the input end of the signal amplifier U1; the other end of the comparison resistor R1 and the other end of the pull-up resistor R2 are connected to the VCC power supply; the signal amplifying circuit U1 will The input signal is amplified and then output to the microcontroller. When the height of the grain pile surface (grain surface) in the granary changes, the photoresistor will expose the surface of the grain pile or bury it into the grain pile when the grain surface is falling or rising. At this time, because the light intensity inside the grain pile is inconsistent with the outside, use This change to get the data. The high and low levels collected by the signal amplification circuit are transmitted to the single-chip microcomputer, and the single-chip microcomputer performs corresponding processing according to the collected data.

Each photosensitive detection unit is arranged at a predetermined height in the granary and arranged vertically on the wall of the granary. Each photosensitive detection unit works at the same time. When the grain surface changes, the photoresistor detection unit can collect the height change of the current grain surface and send the data to the single-chip microcomputer. The single-chip microcomputer processes the signal and sends the current grain surface height to the display terminal. show. If the height of the grain pile is abnormal, the speaker alarm will be triggered immediately, and the GPRS module will be activated at the same time to send the abnormal message to the intelligent terminal used by the supervisor, so as to make effective corresponding decisions in time.

The utility model uses photoresistors to detect the height of grain piles in the process of grain storage, effectively monitors the existing inventory in real time, and gives timely early warning when grain conditions change. This technology is of great significance for safe and efficient supervision of grain.

Claims (5)

1. grain bulk height detects a prior-warning device, it is characterized in that: comprise single-chip microcomputer, and described single-chip microcomputer connects photoresistance array module, alarm, the wireless communication module communicated with intelligent terminal, shows the display terminal of grain bulk height value; Described photoresistance array module is comprised and multiplely to be detected because the photosensitive detecting unit of the light intensity change that grain out-pile causes is buried by grain heap or is exposed in photoresistance by photoresistance, and described each photosensitive detecting unit is arranged on the predetermined altitude in silo.

2. grain bulk height according to claim 1 detects prior-warning device, it is characterized in that: described each photosensitive detecting unit comprises photoresistance, signal amplifier, pull-up resistor, comparison resistance device; One end of photoresistance is connected with one end of comparison resistance device, the input end of signal amplifier, the other end ground connection of photoresistance; The input end of one end connection signal amplifier of pull-up resistor; The other end of comparison resistance device is all connected power supply with the other end of pull-up resistor; Signal amplification circuit exports single-chip microcomputer to after being amplified by the signal of input.

3. grain bulk height according to claim 1 detects prior-warning device, it is characterized in that: described each photosensitive detecting unit vertical arrangement is on the wall of silo.

4. grain bulk height according to claim 1 detects prior-warning device, it is characterized in that: described alarm adopts loudspeaker.

5. grain bulk height according to claim 1 detects prior-warning device, it is characterized in that: described wireless communication module adopts GPRS module.